CN117651339A - Precoding method and related device - Google Patents

Abstract

The application discloses a precoding method and a related device, which are applied to user equipment, wherein the method comprises the following steps: acquiring first DCI and second DCI; the first DCI comprises first indication information used for a first frequency domain range, the second DCI comprises third indication information used for a second frequency domain range, and the precoded data is sent through a transmission channel, wherein the precoded data is obtained by precoding data to be transmitted according to the first indication information and the third indication information. The first indication information and the third indication information are indicated jointly through the first DCI and the second DCI, so that different indication information is used for different frequency domain ranges, precoding of the corresponding frequency domain ranges by using the different indication information is achieved, accuracy of precoding information is improved, error rate is reduced, and transmission efficiency is improved.

Description

Precoding method and related device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a precoding method and a related device.

Background

The communication system may include network devices such as base stations. The network device may support communication with a plurality of terminal devices. The terminal device may be a User Equipment (UE). The uplink data transmission of the terminal device to the network device is generally performed by a wideband precoding-based manner to suppress that a plurality of terminal devices simultaneously transmit signals to the network device may cause interference between signals.

However, as the number of antennas of the terminal device increases and the transmission bandwidth increases, the wideband precoding-based scheme may result in low uplink transmission efficiency.

Disclosure of Invention

Based on the above problems, the present application provides a precoding method and a related device, so as to solve the problem of low uplink transmission efficiency.

The embodiment of the application discloses the following technical scheme:

in a first aspect, the present application provides a precoding method, applied to a user equipment, where the method includes: acquiring first DCI and second DCI; the first DCI comprises first indication information used for a first frequency domain range, the second DCI comprises third indication information used for a second frequency domain range, and the precoded data is sent through a transmission channel, wherein the precoded data is obtained by precoding data to be transmitted according to the first indication information and the third indication information.

The first indication information and the third indication information are indicated jointly through the first DCI and the second DCI, so that different indication information is used for different frequency domain ranges, precoding of the corresponding frequency domain ranges by using the different indication information is achieved, accuracy of precoding information is improved, error rate is reduced, and transmission efficiency is improved.

In one possible implementation, the first indication information further includes at least one of a first MCS and a first layer indication information; the first layer indication information is used to indicate the number of layers of the transport channel.

In one possible implementation, the first DCI further includes second indication information; the second indication information is used to indicate information of the second DCI. In this way, whether the associated second DCI exists or not is reflected through the second indication information in the first DCI, and when the second indication information indicates that the second DCI exists, the second precoding information is determined through the third indication information in the second DCI, so that the first DCI and the second DCI jointly indicate the first precoding information and the second precoding information, the first precoding information and the second precoding information are utilized for precoding, the corresponding frequency domain range is precoded through different indication information, the accuracy of the precoding information is improved, the error rate is reduced, and the transmission efficiency is improved.

In one possible implementation, the second indication information includes at least one of the first information, the second information, and the third information; the first information is used for indicating whether the second DCI exists or not, the second information is used for indicating whether the second DCI contains a second MCS domain or not, and the third information is used for indicating whether the second DCI contains a second layer indication information domain or not.

In one possible implementation, the third indication information further includes at least one of a second MCS field and a second layer indication information; the second layer indication information is used to indicate the number of layers of the transport channel.

In one possible implementation, the user equipment transmits the transmission channel according to the third indication information.

In one possible implementation, the frequency domain range of the transmission channel includes a plurality of frequency domain subbands; the third indication information includes K second precoding information, K is a positive integer greater than or equal to 1, the first frequency domain range is a first frequency domain subband set, frequency domain subbands other than the first frequency domain subband set of the plurality of frequency domain subbands are divided into K second frequency domain subband sets, and each of the plurality of second frequency domain ranges is one of the K second frequency domain subband sets. That is, when the third indication information includes K pieces of second precoding information, the plurality of pieces of second precoding information exist in respective corresponding second frequency domain ranges. Therefore, the plurality of second precoding information is respectively applied to different frequency domain sub-bands, namely, different precoding information is applied to different frequency domain ranges, so that the corresponding frequency domain ranges can be precoded by using different precoding information, the precoding accuracy is further improved, the error rate is reduced, and the transmission efficiency is improved.

In one possible implementation, the number of the plurality of frequency domain subbands may be determined according to a number of resource blocks RBs configured by the network device and a number of RBs included in a frequency domain range of the transmission channel.

In one possible implementation, the number of RBs for each of the plurality of frequency domain subbands may be determined based on a number of the plurality of frequency domain subbands configured by the network device and a number of RBs included in a frequency domain range of the transmission channel.

In one possible implementation, the method further includes: and receiving third DCI which comprises fifth indication information and is sent by the network equipment, and not receiving fourth DCI which comprises sixth indication information, wherein the fifth indication information comprises third precoding information, the sixth indication information comprises fourth precoding information, and precoding second data to be transmitted according to the third precoding information which is contained in the fifth indication information. That is, when the network device transmits the third DCI and the fourth DCI, but the user device does not receive the fourth DCI, precoding may be performed according to the third precoding information in order to ensure reliability of data transmission.

In one possible implementation, the second DCI further includes fourth indication information for indicating whether to use the first indication information in the first DCI; if the fourth indication information indicates that the first indication information in the first DCI is not used, the precoded data to be transmitted is obtained by precoding the data to be transmitted according to the third indication information. That is, when the fourth indication information in the second DCI indicates that the first DCI is not used, the data to be transmitted may be precoded according to only the third indication information.

In one possible implementation, the number of layers of the transport channel indicated by the first layer indication information in the first indication information is the same as the number of layers of the transport channel indicated by the second layer indication information in the third indication information.

In one possible implementation, if the number of layers of the transmission channel indicated by the first layer indication information in the first indication information is different from the number of layers of the transmission channel indicated by the second layer indication information in the third indication information, the precoded data to be transmitted is obtained by precoding the data to be transmitted according to the third indication information.

In one possible implementation, the number of antenna ports indicated by the first precoding information in the first indication information is the same as the number of antenna ports indicated by the second precoding information in the third indication information.

In one possible implementation, the non-zero power antenna port indicated by the first precoding information in the first indication information is the same as the non-zero power antenna port indicated by the second precoding information in the third indication information.

In a second aspect, the present application provides a precoding method applied to a network device, where the method includes: transmitting first DCI including first indication information and second DCI including third indication information; the method comprises the steps that first indication information is used for a first frequency domain range, third indication information is used for a second frequency domain range, and pre-encoded data to be transmitted are obtained, wherein the pre-encoded data to be transmitted are obtained through pre-encoding the data to be transmitted according to the first indication information or the third indication information.

It should be noted that, the precoding method provided in the second aspect corresponds to the precoding method provided in the first aspect, so various implementation manners of the second aspect and the technical effects thereof may be described with reference to the relevant points of the corresponding implementation manners and the technical effects thereof in the first aspect, which are not described herein.

In a third aspect, the present application provides a terminal device, including: a memory for storing a computer program or computer instructions; a processor for executing a computer program or computer instructions stored in a memory to cause a terminal device to perform a method as in the first aspect.

In a fourth aspect, the present application provides a network device, the network device comprising: a memory for storing a computer program or computer instructions; a processor for executing a computer program or computer instructions stored in a memory to cause a network device to perform a method as in the second aspect.

In a fifth aspect, the present application provides a communication system comprising a terminal device for performing a method as in the first aspect and a network device for performing a method as in the second aspect.

In a sixth aspect, the present application provides a computer storage medium storing a computer program for implementing the methods of the first and second aspects when the computer program is executed.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a diagram illustrating a scenario in which a base station communicates with a terminal according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a precoding method provided in an embodiment of the present application;

fig. 3 is a schematic diagram of a precoding method provided in an embodiment of the present application;

fig. 4 is a schematic diagram of hardware components of an electronic device according to an embodiment of the present application;

fig. 5 is a schematic diagram of hardware components of another electronic device according to an embodiment of the present application.

Detailed Description

For clarity and conciseness in the description of the following embodiments, a brief description of the related art will be given first:

A transmission channel refers to a transmission channel of a signal, the role of which is to provide a channel for data transmission, which defines the way and characteristics of data transmission over the air interface. In wireless communication, a transmission channel may refer to a path through which radio waves are transmitted over the air, whereas in wired communication, a transmission channel refers to a data transmission path through a medium such as a cable or an optical fiber. Illustratively, the transmission channel may be a PUSCH (Physical Uplink Share Channel, physical uplink shared channel), but is not limited thereto. In the following embodiments, a transmission channel is exemplified as PUSCH.

DCI (Downlink Control Information) is content transmitted in a PDCCH (Physical Downlink Control Channel ) channel. DCI has a plurality of formats, and different formats are adopted according to different purposes and scenes. In LTE (Long Term Evolution ) systems, network devices are used to communicate DCI, including scheduling resource allocation, scheduling request, transmission mode selection, etc., to User Equipment (UE) over DCI. The DCI format includes different fields for conveying different control information. The control information includes time-frequency domain location information, MCS and layer indication information of PUSCH channel data.

The PUSCH is used for transmitting uplink user data in the 5G wireless communication system, and the PUSCH may transmit the user data of the user equipment to the network equipment through precoding, modulation, and other steps. And the network equipment performs channel estimation and demodulation according to the received PUSCH symbols, so as to extract uplink data of the user equipment.

MCS (Modulation and Coding Scheme, modulation and coding strategy) for implementing configuration parameters for 802.11n radio frequency rates. The MCS is a digital index that is used to represent a combination of different modulation and coding strategies. By adjusting the value of the MCS, the characteristics and transmission rate of the wireless signal may be changed to meet different network requirements and conditions.

The layer indication information is used to indicate the number of uplink layers, such as 2 layers, 3 layers, etc. The number of layers for uplink transmission is used to increase system capacity and improve signal quality in precoding. That is, by transmitting data in multiple layers, spatial diversity can be exploited to improve the reliability and performance of the system. Precoding techniques can map multiple data streams onto multiple antennas through linear transforms to achieve spatial diversity. Therefore, the transmission error of the signal can be reduced, and the anti-interference capability and coverage range of the signal are improved. The more number of transmission layers in precoding, the better the capacity and performance of the system. The degree of freedom of the system can be increased by increasing the number of layers of uplink transmission, and the reliability and the anti-interference capability of signals are improved. However, increasing the number of layers for uplink transmission also increases the complexity and power consumption of the system. Therefore, the number of uplink layers in the embodiment of the present application may be determined according to actual requirements, which is not specifically limited herein.

Precoding is a technique used in communication systems to improve the efficiency and reliability of multi-user communications. The precoding reduces interference between multiple users and improves transmission quality of signals by processing data at a transmitting end such as a user equipment. Precoding can be classified into linear precoding and nonlinear precoding. Linear precoding encodes data into a transmission signal by using a linear transformation matrix. Linear precoding includes, but is not limited to, zero precoding and minimum mean square error precoding, and is not limited herein. Nonlinear precoding encodes data using nonlinear transformation and designs a precoding matrix by an optimization algorithm. Non-linear precoding includes, but is not limited to, zero forcing criterion design and minimum mean square error criterion design, and is not limited herein.

Frequency domain refers to a representation of a signal in frequency. The frequency domain converts the signal from the time domain to the frequency domain by performing a fourier transform or other spectral analysis of the signal. In the frequency domain, the signal may be represented as components or spectra of different frequencies. Frequency domain analysis can help us understand the frequency characteristics of a signal, such as the intensity of frequency components, frequency distribution, etc.

A frequency band refers to a range of signals in frequency. For a channel, a frequency band is the frequency domain range between the highest frequency and the lowest frequency of the signal that is allowed to be transmitted. For a signal, a frequency band is the frequency domain range between the highest frequency and the lowest frequency that the signal contains. The frequency band may be used to describe the frequency domain range of the signal or the bandwidth of the transfer function of the system.

Precoding information means information required for the UE to transmit data to the terminal equipment, including but not limited to channel state information, user data, transmission mode, precoding algorithm, system parameters, etc., and is not particularly limited herein. Channel State Information (CSI) means information required for precoding to be optimized, such as channel gain, phase, etc. information between a network device and a UE. User data means user data to be transmitted, such as a size, a format, etc., of data, for precoding. The transmission mode means that the transmission mode, e.g. single user transmission or multi-user transmission, as well as the modulation and coding scheme used, etc., needs to be determined for precoding. The precoding algorithm means a precoding algorithm required for precoding, such as FC-ZF (full-Connected Zero-forming) and pzf+ (Partial Zero-forming Plus), etc. The system parameters mean parameters of the system required for precoding, such as the number of antennas, the number of subcarriers, signal-to-noise ratio, etc.

The following describes advantages of a precoding method provided by the embodiments of the present application in combination with a precoding method provided by the related art.

In the related art, when a terminal device transmits data to a network device, interference between signals possibly caused by a plurality of terminal devices transmitting signals to the network device at the same time is generally suppressed by a wideband precoding-based manner. Illustratively, in uplink data (meaning data sent by a terminal device to a network device) transmission, a base station (eNodeB) sends DCI to a User Equipment (UE) and then is received by the UE. After receiving the DCI, the UE performs precoding based on all frequency domain ranges in the PUSCH by using precoding information in the DCI.

However, the channel characteristics may be different between different frequency domain ranges in PUSCH, and if the same precoding information is used for channels in different frequency domain ranges, the characteristics of each frequency domain cannot be fully utilized, resulting in a decrease in transmission efficiency. For example, assuming that the PUSCH channel has the frequency domain a and the frequency domain B, the channel characteristics of the frequency domain a are better, and the channel characteristics of the frequency domain B are worse, if the frequency domain a and the frequency domain B use the same precoding information, a part of coding resources may be wasted on the frequency domain a, and a higher bit error rate may occur on the frequency domain B, which results in a decrease in transmission efficiency.

In order to solve the above-mentioned problems, the embodiments of the present application provide a precoding method and related apparatus, where in the precoding method, the precoding method includes a first DCI and a second DCI, the first DCI includes first indication information, the second DCI includes third indication information, the first indication information includes first precoding information used in a first frequency domain range, the third indication information includes at least one second precoding information used in a second frequency domain range, that is, the first precoding information and the second precoding information are indicated jointly by the first DCI and the second DCI, so that different precoding information is used in different frequency domain ranges, and precoding is performed on the corresponding frequency domain range by using the different precoding information, so that accuracy of the precoding information is improved, error rate is reduced, and transmission efficiency is improved.

The precoding method is suitable for a communication system. The communication system may be a second generation (2G) communication system, a third generation (3G) communication system, an LTE system, a fifth generation (5G) communication system, a hybrid architecture of LTE and 5G, a new 5G wireless (5G New Radio,5G NR) system, a new communication system in future communication development, and the like.

The communication system includes a first device and a second device. The first device may be a device on the network side for providing network communication functions, in some cases also referred to as a network device, a network element, which may typically be a base station (including a functional unit of a base station, or a combination of functional units of a base station) or a core network unit, wherein the core network unit may be a functional unit in the core network, including but not limited to an access and mobility management function (Access and Mobility Management Function, AMF) unit or a session management function (Session Management Function, SMF) unit. The second device may be a device accessing the network, typically a terminal device. Referring to fig. 1, an exemplary diagram of a scenario in which a base station communicates with a terminal is provided in an embodiment of the present application. Fig. 1 includes a base station 1 and a terminal 2.

In the embodiments provided herein, the base station may be any device having a wireless transceiver function, including but not limited to: an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in long term evolution (long term evolution, LTE), a base station (gnnodeb or gNB) or transceiver point (transmission receiving point/transmission reception point, TRP) in New Radio (NR), a base station for 3GPP subsequent evolution, an access node in Wi-Fi system, a wireless relay node, a wireless backhaul node, etc. The base station may be: macro base station, micro base station, pico base station, small station, relay station, balloon station, or the like. A base station may include one or more co-sited or non-co-sited transmission points (Transmission Reception Point, TRP). The base station may also be a radio controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in the cloud radio access network (cloud radio access network, CRAN) scenario. The base station may communicate with the terminal or may communicate with the terminal through a relay station. The terminal may communicate with a plurality of base stations of different technologies, for example, the terminal may communicate with a base station supporting an LTE network, may communicate with a base station supporting a 5G network, and may perform dual connectivity with the base station supporting the LTE network and the base station supporting the 5G network.

In the embodiments provided herein, the terminal may be in various forms, such as a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medium), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wearable terminal device, and the like. A terminal may also be referred to as a terminal device, user Equipment (UE), access terminal device, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent, UE apparatus, or the like. The terminal may also be a fixed terminal or a mobile terminal.

In order to make the technical scheme of the application clearer and easier to understand, the precoding method of the application is described below with reference to the accompanying drawings.

Referring to fig. 2, the flow chart of a precoding method provided in the embodiment of the present application is shown. The method is applied to terminal equipment, such as mobile phones, computers and the like, and is described below as UE. The method comprises the following steps:

s201: and receiving the first DCI and the second DCI sent by the network equipment.

The first DCI includes first indication information. The first indication information includes first precoding information for a first frequency domain range. In some possible implementations, the first indication information may further include information of a first MCS, first layer indication information, and the like, but is not limited thereto. The first DCI may further include second indication information. The second indication information is used to indicate information related to the second DCI. In some possible implementations, the second indication information may include information indicating whether the second DCI exists, information indicating whether the second DCI includes a second MCS field, information indicating whether the second DCI includes an indication field of the second layer indication information.

In order to embody the association between the first DCI and the second DCI, the first DCI includes second indication information for indicating related information of the second DCI, so as to indicate whether the second DCI exists or not, and a state of the second DCI. In other possible implementations, to embody the association between the first DCI and the second DCI, it may also be indicated by other instructions or information, which is not limited herein.

The second DCI includes third indication information. The third indication information comprises at least one second precoding information for the second frequency domain range. In some possible implementations, the third indication information may further include information of a second MCS, second layer indication information, and the like, but is not limited thereto.

In one example, if the second DCI includes a second precoding information, where the first frequency domain range is 0-100 hz of PUSCH and the second frequency domain range is 101-200 hz of PUSCH, the first precoding information is used for 0-100 hz of PUSCH and the second precoding information is used for 101-200 hz of PUSCH.

In another example, if the second DCI includes two second precoding information, the first frequency domain range is 0-100 hz of PUSCH, the second frequency domain range a is 101-200 hz of PUSCH, the second frequency domain range B is 201-300 hz of PUSCH, then the first precoding information is used for 0-100 hz of PUSCH, one second precoding information is used for 101-200 hz of PUSCH, and the other second precoding information is used for 201-300 hz of PUSCH.

In the embodiment of the application, the first indication information and the third indication information are indicated jointly through the first DCI and the second DCI, so that different indication information is used in different frequency domain ranges, precoding of the corresponding frequency domain ranges by using the different indication information is achieved, accuracy of precoding information is improved, error rate is reduced, and transmission efficiency is improved.

S202: and decoding the received first DCI and the second DCI to obtain first indication information, second indication information and third indication information.

In the embodiment of the present application, taking the first DCI including the first indication information and the second indication information as an example, in some possible implementations, decoding the received first DCI may only obtain the first indication information, but the present invention is not limited thereto.

Taking the first DCI as an example, the descrambling operation may be performed on the first DCI to remove the interference in the received signal; then after descrambling the first DCI, checking the first DCI after descrambling to verify whether the received first DCI is correct or not; after determining that the first DCI is correct, the UE may decode the first DCI to obtain specific control information included in the first DCI, e.g., obtain first indication information and second indication information in the DCI. The decoding operation of the second DCI may refer to the decoding process of the first DCI, which is not described herein. The specific descrambling, verification and decoding processes can be referred to in the related art, and are not specifically described herein.

Illustratively, the first indication information may include a first MCS, first precoding information, and first layer indication information; the second indication information may include information for indicating whether the second DCI exists, information for indicating whether the second DCI includes a second MCS field, information for indicating whether the second DCI includes an indication field of the second layer indication information; the third indication information may include a second MCS, at least one second precoding information, and a second layer indication information.

S203: and determining a first precoding matrix and a second precoding matrix according to the first indication information, the second indication information and the third indication information.

The first indication information may include first precoding information, and the first precoding information may include a Precoding Matrix Index (PMI), so that the state of a channel may be known through the first precoding information, and an appropriate precoding matrix may be selected for signal processing according to the information. As an example, taking the first precoding information as an example, a precoding table may be searched according to the first precoding information to obtain a corresponding precoding matrix. As an example, taking the first precoding information as an example, the precoding matrix may be formed by a series of coding parameters, such as amplitude, phase, etc., so that the first precoding information may be parsed to obtain parameters, such as amplitude, phase, etc., and the precoding matrix is further determined according to the parameters, such as amplitude, phase, etc.

In one possible implementation manner, before determining the second precoding matrix, determining whether the second DCI associated with the first DCI exists or not through second indication information, and if the second indication information indicates that the second DCI exists, determining the second precoding matrix according to second precoding information in third indication information; if the second indication information indicates that the second DCI does not exist, the second precoding matrix does not need to be determined.

It should be understood that whether the associated second DCI exists or not is reflected by the second indication information in the first DCI, and when the second indication information indicates that the second DCI exists, the second DCI is acquired to determine the second precoding information by the third indication information in the second DCI, so that the first DCI and the second DCI jointly indicate the first precoding information and the second precoding information, and precoding is performed by using the first precoding information and the second precoding information.

S204: and respectively determining a first precoding vector and a second precoding vector by using the first precoding matrix and the second precoding matrix.

Taking the first precoding matrix as an example, singular value decomposition (Singular Value Decomposition, SVD) can be performed on the first precoding matrix to obtain three matrices of U, S and V, respectively; then selecting column vectors corresponding to the first n largest singular values in the S matrix, wherein n is the dimension of the precoding vector; the first precoding vector may be determined by using the plurality of column vectors as precoding vectors.

The first precoding vector and the second precoding vector are used for performing linear transformation on data to be transmitted so as to improve signal quality or reduce interference.

The data to be transmitted means data to be transmitted by the UE to the network device. The data to be transmitted includes, but is not limited to, audio, video, pictures, text, files, installation packages, etc., and is not particularly limited herein.

S205: and precoding data to be transmitted by using the first precoding vector and the second precoding vector.

It should be understood that, in the embodiment of the present application, the first precoding information and the second precoding information are included, and are used in different frequency domain ranges, so after the first precoding vector and the second precoding vector are obtained according to the first precoding information and the second precoding information, the data to be transmitted needs to be precoded in different frequency domain ranges by using the first precoding vector and the second precoding vector. For example, assuming that the frequency domain range used by the first precoding information is 0-100 hz and the frequency domain range used by the second precoding information is 101-200 hz, precoding first data on 0-100 hz in the data to be transmitted by using the first precoding vector, and precoding second data on 101-200 hz in the data to be transmitted by using the second precoding vector.

In the embodiment of the present application, the number of layers of the transmission channel corresponding to the precoding indicated by the first precoding information needs to be the same as the number of layers of the transmission channel corresponding to the precoding indicated by the second precoding information. The number of antenna ports corresponding to the precoding indicated by the first precoding information needs to be the same as the number of antenna ports corresponding to the precoding indicated by the second precoding information. The number of layers and the number of antenna ports of the transmission channel together determine the dimension of the precoding matrix. Illustratively, the number of layers of the transmission channel is 2, the number of antenna ports is 4, and the dimension of the precoding matrix may be 4x2. The dimensions of the first precoding matrix and the second precoding matrix are the same. The non-zero power antenna ports included in the precoding indicated by the first precoding information need to be the same as the non-zero power antenna ports included in the precoding indicated by the second precoding information. Illustratively, the antenna port of the non-zero power contained in the first layer in the precoding indicated by the second precoding information needs to be the same as the antenna port of the non-zero power contained in the first layer in the precoding indicated by the first precoding information; the antenna port of non-zero power contained in the second layer in the precoding indicated by the second precoding information needs to be the same as the antenna port of non-zero power contained in the second layer in the precoding indicated by the first precoding information; and so on.

S206: and mapping the precoded data to be transmitted to the corresponding transmission channel.

Wherein the precoded data includes data precoded with a first precoding vector and data precoded with a second precoding vector.

The number of transmission layers is used to increase system capacity and improve signal quality in precoding. That is, by transmitting data in multiple layers, spatial diversity can be exploited to improve the reliability and performance of the system. Precoding techniques can map multiple data streams onto multiple antennas through linear transforms to achieve spatial diversity. Therefore, the transmission error of the signal can be reduced, and the anti-interference capability and coverage range of the signal are improved. The more number of transmission layers in precoding, the better the capacity and performance of the system. The degree of freedom of the system can be increased by increasing the number of transmission layers, and the reliability and the anti-interference capability of signals are improved. However, increasing the number of transmission layers also increases the complexity and power consumption of the system. Therefore, the number of transmission layers in the embodiment of the present application may be determined according to actual requirements, and is not specifically limited herein.

It should be understood that, in the embodiment of the present application, the precoded data to be transmitted may be mapped to different transmission layers of the PUSCH through the number of transmission layers in the DCI.

S207: and sending the precoded data to be transmitted to the network equipment through the corresponding transmission channel.

It should be noted that, because the precoded data to be transmitted is processed according to the first precoding vector and the second precoding vector, after the network device receives the precoded data to be transmitted, the precoded data to be transmitted needs to be processed (such as performing channel measurement, channel equalization and channel decoding) according to the first precoding information and the second precoding information, and complete data to be transmitted is obtained.

Based on the precoding method provided in the foregoing embodiment, the frequency domain range indicated by each of the first precoding information in the first indication information in the first DCI and the at least one second precoding information in the third indication information in the second DCI is related to the frequency domain indication mode of the PUSCH.

In one possible implementation, the first precoding information may be for a specific frequency domain range of the PUSCH and the second precoding information may be for a frequency domain range other than the specific frequency domain range. The frequency domain range of the PUSCH may be divided into a plurality of frequency domain subbands, and the first precoding information may be used for one specific frequency domain subband. For example, if the number of frequency domain subbands of the PUSCH is 2N, the first precoding information may be applied to an nth frequency domain subband of the PUSCH (refer to a specific frequency domain range); if the number of frequency domain subbands of PUSCH is 2n+1, the first precoding information may be applied to the n+1th frequency domain subband of PUSCH.

The frequency domain range refers to a frequency interval for describing a distribution range of signals or data on a frequency axis. The frequency domain range covers a plurality of spectral components in the signal or data.

Frequency domain sub-bands refer to a narrower frequency interval in the frequency domain that describes a particular spectral component or set of spectral components. The frequency domain subbands may be used to distinguish the distribution of different signals or data streams over frequency.

In another possible implementation, if the second indication information in the first DCI indicates that the second DCI is not present, the first precoding information may be wideband precoding and may be applied to all frequency domain ranges of PUSCH.

In still other possible implementations, the second precoding information in the second DCI may be applied to a specific frequency domain range of PUSCH. For example, the frequency domain range of the PUSCH may be divided into a plurality of frequency domain subbands, and a plurality of second precoding information may be used for each corresponding specific frequency domain subband, i.e., each second precoding information may be applied to one frequency domain subband.

In one possible implementation, the frequency domain range of the transmission channel may include a plurality of frequency domain subbands, and the third indication information includes K second precoding information; wherein K is a positive integer greater than or equal to 1. The first frequency domain range is a first set of frequency domain subbands; dividing a frequency domain sub-band except the first frequency domain sub-band set in the plurality of frequency domain sub-bands into K second frequency domain sub-band sets; each of the plurality of second frequency domain ranges is one of K second frequency domain subband sets. For example, assuming that the frequency domain range of the transmission channel includes 10 frequency domain subbands, the third indication information includes 3 second precoding information, the first frequency domain range may be the first 4 frequency domain subbands, the frequency domain subbands other than the first 4 are divided into 3 second frequency domain subband sets, and each of the 3 second frequency domain ranges corresponds to one of the 3 second frequency domain subband sets.

In some possible implementations, the size of the frequency domain sub-bands or the number of frequency domain sub-bands may be configured by the network device. In one example, the network device configures the frequency domain sub-band to have a size of M RBs, and the frequency domain range of the PUSCH includes N RBs, and then the number of frequency domain sub-bands is. In another example, the network device configures the number of frequency sub-bands to be P, and the frequency domain range of PUSCH includes N RBs, and the number of RBs included in each frequency domain sub-band is +.>。

In one possible implementation, the first precoding information may be applied to frequency domain subbands with odd or even numbers within the PUSCH frequency domain. For example, the first precoding information may be applied to frequency domain subbands with sequence numbers 1,3,5,7, … …, n, where n is an odd number; then, the second precoding information may be applied to frequency domain subbands with sequence numbers 2,4,6,8, … …, m, where m is an even number.

In one possible implementation, the first precoding information may be applied to an index range of a frequency domain sub-band specific to a PUSCH frequency domain range. For example, the first precoding information may be applied to the first, second, and third precoding information of 1,2, …,a plurality of frequency domain subbands; then the second precoding information may be applied to the remaining frequency domain subbands.

In another possible implementation, when the frequency domain range of PUSCH is a discontinuous RB, the PUSCH frequency domain range may be divided into two frequency domain subbands that are fixedly divided. Illustratively, if the frequency domain range of PUSCH includes N RBs, the number of RBs that may be included in the first frequency domain subband is m=The second frequency domain sub-band contains a number of RBs N-M. The first precoding information may be applied to a first frequency domain sub-band of the frequency domain range of the PUSCH and the second precoding information may be applied to a second frequency domain sub-band of the frequency domain range of the PUSCH. As an example, the first precoding information may be applied to 1,2, …, +.>The second precoding information may be applied to +.>，/>…, P frequency domain subbands.

Based on the precoding method provided in the foregoing embodiment, the following further describes a procedure in which the user equipment performs precoding using the first DCI and/or the second DCI under different conditions.

In one possible implementation manner, if the terminal device does not receive or detect the second DCI, the terminal device performs precoding on the data to be transmitted according to the first indication information of the first DCI, and transmits the precoded data to be transmitted to the network device through the transmission channel.

It should be understood that, when the network device sends control information to the user device, the network device may send only the first DCI, where the data to be transmitted needs to be precoded through the first DCI, and the first precoding information in the first indication information may be applied to all frequency domain ranges of the PUSCH.

In another possible implementation manner, if the second DCI includes indication third indication information, the third indication information includes at least one second precoding information and one second MCS field, and the second MCS field is used to indicate the second MCS.

If the user equipment does not receive or detect the second DCI, the user equipment performs precoding on the data to be transmitted according to the first indication information of the first DCI, and uplink-transmits the precoded data to be transmitted to the network equipment through a transmission channel.

It should be understood that, when the network device sends the first DCI and the second DCI to the user device, the user device may not receive the second DCI sent by the network device, and at this time, the data to be transmitted needs to be precoded according to the first indication information of the first DCI to ensure reliability of data transmission. The first indication information may include first precoding information and a first MCS field, where the first MCS field is used to indicate the first MCS, the first precoding information is wideband precoding, and the first precoding information may be applied to all frequency domain ranges of PUSCH.

If the user equipment receives or detects the second DCI, the data to be transmitted is transmitted to the network equipment on the transmission channel after the second MCS is applied. Further, the user equipment may pre-encode the data to be transmitted according to one of the following manners:

mode one: and the user equipment performs precoding on the data to be transmitted according to the first precoding information of the first DCI and the second precoding information of the second DCI.

Mode two: the second DCI may further include fourth indication information, where the fourth indication information is used to indicate whether the first precoding information of the first DCI is used, and if the fourth indication information indicates that the first precoding information is not used, the user equipment may precode the data to be transmitted according to the second precoding information in the second DCI.

In yet another possible implementation manner, the second DCI includes third indication information, where the third indication information includes at least one second precoding information, a second layer indication information field, and a second MCS field, where the second layer indication information field is used to indicate the second layer indication information, and the second MCS field is used to indicate the second MCS.

If the user equipment does not receive or detect the second DCI, the user equipment performs precoding on the data to be transmitted according to the first indication information of the first DCI, and uplink-transmits the precoded data to be transmitted to the network equipment through a transmission channel.

It should be understood that, when the network device sends the first DCI and the second DCI to the user device, the user device may not receive the second DCI sent by the network device, and at this time, the data to be transmitted needs to be precoded according to the first indication information of the first DCI to ensure reliability of data transmission. The first indication information may include first precoding information and a first MCS field, where the first MCS field is used to indicate the first MCS, the first precoding information is wideband precoding, and the first precoding information may be applied to all frequency domain ranges of PUSCH.

If the user equipment receives or detects the second DCI, the user equipment performs precoding on the data to be transmitted according to the first indication information and/or the third indication information, and uplink transmits the precoded data to be transmitted to the network equipment through a transmission channel.

It should be understood that, if the number of layers indicated by the first layer indication information is different from the number of layers indicated by the second layer indication information, the user equipment may ignore the first precoding information and precode the data to be transmitted according to the second precoding information. If the number of layers indicated by the first layer indication information is the same as the number of layers indicated by the second layer indication information, the first precoding information may be applied to a specific frequency domain subband of the PUSCH, and the second precoding information may be applied to other frequency domain subbands except for the specific frequency domain subband. That is, if the first precoding information is applied to one specific frequency domain sub-band of the PUSCH, the second precoding information no longer indicates the precoding information of the specific frequency domain sub-band.

The layer number indicated by the first layer indication information is the same as the layer number indicated by the second layer indication information; the number of antenna ports included in the precoding indicated by the second precoding information needs to be the same as the number of antenna ports included in the precoding indicated by the first precoding information; the antenna ports of non-zero power included in the precoding indicated by the plurality of second precoding information need to be the same.

Based on the precoding method provided in the foregoing embodiment, in order to further explain the process of uplink data transmission from the user equipment to the network equipment, referring to fig. 3, fig. 3 shows an interaction process between the user equipment and the network equipment.

As shown in fig. 3, the precoding method provided in the embodiment of the present application may include:

s301: the user equipment sends a data request to the network equipment. Correspondingly, the network device receives a data request sent by the user device.

Wherein the data request is used for requesting to send data to be transmitted to the network device. For example, if the user device needs to send an audio file to the network device, a data request needs to be generated according to the audio file, where the data request may include information such as a destination address, a data type, and the like of the audio file.

S302: the network device receives the data request and analyzes and processes the data request.

After receiving the data request sent by the user equipment, the network equipment analyzes and processes the data request. For example, the network device may determine a transmission path of the data to be transmitted according to the destination address in the data request.

S303: and the network equipment allocates resources to the user equipment according to the analysis and processing results.

After determining the transmission path of the data to be transmitted, the network device allocates corresponding resources, such as radio resources and core network resources, to the user device. The radio resources may include allocated frequencies, chips, etc., and the core network resources may include allocated IP addresses, bearers, etc.

S304: and the network equipment sends the first DCI and the second DCI to the user equipment according to the analysis and processing results. Correspondingly, the user equipment receives the first DCI and the second DCI sent by the network equipment.

The first DCI comprises first indication information and second indication information, the second DCI comprises at least one third indication information, the first indication information comprises first precoding information used for a first frequency domain range, the second indication information is used for indicating related information of the second DCI, and the third indication information comprises at least one second precoding information used for a second frequency domain range.

S305: the user equipment performs precoding on data to be transmitted according to at least one piece of first precoding information in the first DCI and at least one piece of second precoding information in the second DCI, and obtains the precoded data to be transmitted.

It should be noted that, the precoding process in step S305 may refer to steps S201 to S205, which are not described herein.

S306: and the user equipment transmits the precoded data to be transmitted to the network equipment through a transmission channel.

Correspondingly, the network device receives the precoded data to be transmitted, i.e., the transmission channel, sent by the user device.

It should be noted that, the uplink transmission process in step S306 may refer to steps S206 to S207, which are not described herein.

S307: and the network equipment processes the precoded data to be transmitted to obtain the transmission data.

For example, the network device may perform processes such as decoding and signal demodulation on the received preprocessed data to be transmitted, so as to extract the transmission data and perform further processing. In addition to decoding and signal demodulation, the network device may also perform other processing on the received transmission data, such as error correction coding, encryption, and the like. The error correction coding, encryption and other processes can improve the reliability and safety of the transmission data and ensure the normal transmission and processing of the transmission data. The network device then transmits the processed transmission data to the core network or other network node for further processing and transmission.

Referring to fig. 4, a schematic diagram of hardware components of an electronic device according to an embodiment of the present application is shown. The electronic device may be a network device including, but not limited to, a base station, a core network element.

Fig. 4 shows a simplified schematic diagram of a base station structure. The base station includes a portion 410, a portion 420, and a portion 430. The 410 part is mainly used for baseband processing, controlling a base station and the like; portion 410 is typically a control center of the base station, and may be generally referred to as a processor, for controlling the base station to perform processing operations on the network device side in the above method. Portion 420 is mainly used for storing computer program code and data. The 430 part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; portion 430 may be referred to generally as a transceiver module, transceiver circuitry, or transceiver, among others. The transceiver module of section 430, which may also be referred to as a transceiver or transceiver, includes an antenna 433 and radio frequency circuitry (radio frequency circuitry not shown in fig. 4) that is primarily used for radio frequency processing. Alternatively, the means for implementing the receiving function in part 430 may be regarded as a receiver and the means for implementing the transmitting function may be regarded as a transmitter, i.e. part 430 comprises a receiver 432 and a transmitter 431. The receiver may also be referred to as a receiving module, receiver, or receiving circuit, etc., and the transmitter may be referred to as a transmitting module, transmitter, or transmitting circuit, etc.

Portions 410 and 420 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used for reading and executing the program in the memory to realize the baseband processing function and control of the base station. If there are multiple boards, the boards can be interconnected to enhance processing power. As an alternative implementation manner, the multiple boards may share one or more processors, or the multiple boards may share one or more memories, or the multiple boards may share one or more processors at the same time.

For example, in one implementation, the transceiver module of part 430 is configured to perform the transceiver-related procedures performed by the base station (network device) in the foregoing method embodiment. The processor of portion 410 is configured to perform the processes associated with the processing performed by the network device in the foregoing method embodiments.

It should be understood that fig. 4 is merely an example and not a limitation, and that the network device including the processor, memory, and transceiver described above may not rely on the structure shown in fig. 4.

Referring to fig. 5, a schematic diagram of hardware components of another electronic device according to an embodiment of the present application is shown. The electronic device may be a terminal device including, but not limited to, a mobile phone, a smart wearable device (e.g., a smart watch), etc. In the following, taking a mobile phone as an example, the electronic device may include a processor 510, an external memory interface 520, an internal memory 521, an antenna 1, an antenna 2, a mobile communication module 530, a wireless communication module 540, and the like.

It is to be understood that the structure illustrated in the present embodiment does not constitute a specific limitation on the electronic apparatus. In other embodiments, the electronic device may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 510 may include one or more processing units, such as: processor 510 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and/or a neural network processor (neural-network processing unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

It should be understood that the connection relationship between the modules illustrated in this embodiment is only illustrative, and does not limit the structure of the electronic device. In other embodiments of the present application, the electronic device may also use different interfacing manners in the foregoing embodiments, or a combination of multiple interfacing manners.

The external memory interface 520 may be used to connect external memory cards, such as Micro SD cards, to enable expansion of the memory capabilities of the electronic device. The external memory card communicates with the processor 510 via an external memory interface 520 to implement data storage functions. For example, files such as music, video, etc. are stored in an external memory card.

The internal memory 521 may be used to store computer-executable program code that includes instructions. The processor 510 executes various functional applications of the electronic device and data processing by executing instructions stored in the internal memory 521. The internal memory 521 may include a storage program area and a storage data area. The storage program area may store an application program (such as a sound playing function, an image playing function, etc.) required for at least one function of the operating system, etc. The storage data area may store data created during use of the electronic device (e.g., audio data, phonebook, etc.), and so forth. In addition, the internal memory 521 may include a high-speed random access memory, and may further include a nonvolatile memory such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (universal flash storage, UFS), and the like. The processor 510 performs various functional applications of the electronic device and data processing by executing instructions stored in the internal memory 521 and/or instructions stored in a memory provided in the processor.

The wireless communication function of the electronic device may be implemented by the antenna 1, the antenna 2, the mobile communication module 530, the wireless communication module 540, a modem processor, a baseband processor, and the like.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the electronic device may be used to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed into a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 530 may provide a solution for wireless communication including 2G/3G/4G/5G, etc., applied on an electronic device. The mobile communication module 530 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc. The mobile communication module 530 may receive electromagnetic waves from the antenna 1, perform processes such as filtering, amplifying, and the like on the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processor for demodulation. The mobile communication module 530 may amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna 1 to radiate the electromagnetic waves. In some embodiments, at least some of the functional modules of the mobile communication module 530 may be disposed in the processor 510. In some embodiments, at least some of the functional modules of the mobile communication module 530 may be disposed in the same device as at least some of the modules of the processor 510.

The wireless communication module 540 may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN) (e.g., wireless fidelity (wireless fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field wireless communication technology (near field communication, NFC), infrared technology (IR), etc. for application on an electronic device. The wireless communication module 540 may be one or more devices integrating at least one communication processing module. The wireless communication module 540 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 510. The wireless communication module 540 may also receive a signal to be transmitted from the processor 510, frequency modulate it, amplify it, and convert it to electromagnetic waves for radiation via the antenna 2.

In some embodiments, the electronic device initiates or receives a call request through the mobile communication module 530 and the antenna 1.

In addition, an operating system is run on the components. Such as iOS operating systems, android operating systems, windows operating systems, etc. Running applications may be installed on the operating system. It can be clearly understood by those skilled in the art that, for convenience and brevity, any explanation and beneficial effects of the related content in the electronic device provided above may refer to the corresponding method embodiments provided above, and are not repeated herein.

The present application also provides a communication system that may include a network device (e.g., a network device such as a base station) as shown in fig. 4 and a terminal device (e.g., a terminal such as a mobile phone) as shown in fig. 5.

In this application, a terminal or network device may include a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer may include a central processing unit (central processing unit, CPU), a memory management module (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes (processes), for example, a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or windows operating system, etc. The application layer may include applications such as a browser, address book, word processor, instant messaging software, and the like.

The technical solution of the present embodiment may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the method described in the respective embodiments. And the aforementioned storage medium includes: flash memory, removable hard disk, read-only memory, random access memory, magnetic or optical disk, and the like.

The terms first, second, third and the like in the description and in the claims and drawings are used for distinguishing between different objects and not for limiting the specified sequence.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (20)

1. A precoding method, applied to a user equipment, the method comprising:

acquiring first DCI and second DCI; the first DCI includes first indication information including first precoding information for a first frequency domain range; the second DCI comprises third indication information, wherein the third indication information comprises at least one piece of second precoding information used for a second frequency domain range;

Transmitting the precoded data to be transmitted through a transmission channel; and the precoded data to be transmitted is obtained by precoding the data to be transmitted according to the first indication information or the third indication information.

2. The method of claim 1, wherein the first indication information further comprises at least one of a first MCS and a first layer indication information; the first layer indication information is used for indicating the layer number of the transmission channel.

3. The method of claim 1, wherein the first DCI further comprises second indication information; the second indication information is used for indicating information of the second DCI.

4. The method of claim 2, wherein the second indication information comprises at least one of first information, second information, and third information; the first information is used for indicating whether the second DCI exists, the second information is used for indicating whether the second DCI contains a second MCS domain, and the third information is used for indicating whether the second DCI contains a second layer indication information domain.

5. The method of claim 1, wherein the third indication information further comprises at least one of a second MCS field and a second layer indication information; the second layer indication information is used for indicating the layer number of the transmission channel.

6. The method of claim 4, wherein the user equipment transmits the transport channel according to the third indication information.

7. The method of claim 1, wherein the frequency domain range of the transmission channel comprises a plurality of frequency domain subbands; the third indication information comprises K pieces of second precoding information; k is a positive integer greater than or equal to 1; the first frequency domain range is a first frequency domain subband set; dividing a frequency domain sub-band except the first frequency domain sub-band set in the plurality of frequency domain sub-bands into K second frequency domain sub-band sets; each of the plurality of second frequency domain ranges is one of the K second frequency domain subband sets.

8. The method of claim 7, wherein the number of frequency domain subbands in the frequency domain range for the transmission channel is obtained by: and determining the number of frequency domain sub-bands in the frequency domain range of the transmission channel according to the number of Resource Blocks (RBs) configured by the network equipment and the number of RBs contained in the frequency domain range of the transmission channel.

9. The method of claim 7, wherein the number of resource blocks RBs for each of the plurality of frequency domain subbands is obtained by: and determining the number of RBs of each frequency domain sub-band in the plurality of frequency domain sub-bands according to the number of the plurality of frequency domain sub-bands configured by the network equipment and the number of RBs contained in the frequency domain range of the transmission channel.

10. The method as recited in claim 1, further comprising: receiving third DCI sent by network equipment, and not receiving fourth DCI; the third DCI includes fifth indication information including third precoding information; the fourth DCI comprises sixth indication information, and the sixth indication information DCI comprises fourth precoding information;

and precoding the second data to be transmitted according to the third precoding information contained in the fifth indicating information.

11. The method of claim 1, wherein the second DCI further comprises fourth indication information; the fourth indication information is used for indicating whether to use the first indication information in the first DCI; and if the fourth indication information indicates that the first indication information in the first DCI is not used, the precoded data to be transmitted is obtained by precoding the data to be transmitted according to the third indication information.

12. The method according to any one of claims 1-11, wherein the number of layers of the transport channel indicated by the first layer indication information in the first indication information is the same as the number of layers of the transport channel indicated by the second layer indication information in the third indication information.

13. The method according to any one of claims 1-11, wherein if the number of layers of the transmission channel indicated by the first layer indication information in the first indication information is different from the number of layers of the transmission channel indicated by the second layer indication information in the third indication information, the precoded data to be transmitted is obtained by precoding the data to be transmitted according to the third indication information.

14. The method according to any of claims 1-11, wherein the number of antenna ports indicated by the first precoding information in the first indication information is the same as the number of antenna ports indicated by the second precoding information in the third indication information.

15. The method according to any of claims 1-11, wherein the non-zero power antenna ports indicated by the first precoding information in the first indication information are the same as the non-zero power antenna ports indicated by the second precoding information in the third indication information.

16. A precoding method, applied to a network device, the method comprising:

transmitting first DCI and second DCI; the first DCI includes first indication information, where the first indication information is used in a first frequency domain range; the second DCI includes third indication information, where the third indication information is used in a second frequency domain range;

Acquiring pre-coded data to be transmitted; and the precoded data to be transmitted is obtained by precoding the data to be transmitted according to the first indication information or the third indication information.

17. A terminal device, characterized in that the terminal device comprises:

a memory for storing a computer program or computer instructions;

a processor for executing a computer program or computer instructions stored in the memory to cause the terminal device to perform the method of any one of claims 1 to 15.

18. A network device, the network device comprising:

a memory for storing a computer program or computer instructions;

a processor for executing a computer program or computer instructions stored in the memory to cause the network device to perform the method of claim 16.

19. A communication system, characterized in that the system comprises a terminal device for performing the method according to any of claims 1 to 15 and a network device for performing the method according to claim 16.

20. A computer storage medium for storing a computer program for implementing the method of any one of claims 1 to 15 when executed.