WO2018228266A1

WO2018228266A1 - Channel state information feedback and receiving method, receiving device and transmitting device

Info

Publication number: WO2018228266A1
Application number: PCT/CN2018/090243
Authority: WO
Inventors: 金黄平; 蒋鹏; 毕晓艳; 尚鹏
Original assignee: 华为技术有限公司
Priority date: 2017-06-16
Filing date: 2018-06-07
Publication date: 2018-12-20
Also published as: CN109150268B; CN109150268A

Abstract

The present application provides a channel state information feedback and receiving method and device. The method comprises: a transmitting device generates codebook indication information of K transport layers, the K being greater than or equal to 2, and the codebook indication information comprising beam information of K transport layers, beam superposition coefficient information of m transport layers, and beam reference information of K-m transport layers, wherein 0<m<K; a receiving device determines pre-coding vectors of m transport layers according to the beam information of the K transport layers and the beam superposition coefficient information of the m transport layers; and the receiving device determines pre-coding vectors of K-m transport layers according to the pre-coding vectors of the m transport layers and the beam reference information of the K-m transport layers. By implementing the channel state information feedback and reception technology provided by the present application, the transmission quality can be improved, and the system feedback overhead can be saved.

Description

Channel state information feedback and receiving method, receiving end device and transmitting end device

This application claims the priority of the Chinese Patent Application filed on June 16, 2017, the Chinese Patent Office, the application number is 201710459667.1, and the application name is "channel state information feedback and receiving method, receiving device and transmitting device". The content is incorporated herein by reference.

Technical field

The present application relates to the field of communications, and in particular, to a channel state information feedback and receiving method, a receiving end device, and a transmitting end device.

Background technique

Massive multiple-input multiple-output (Massive MIMO) is one of the industry's recognized 5G key technologies, and achieves significant improvements in spectral efficiency through the use of large-scale antennas.

The accuracy of channel state information (CSI) that the base station can obtain largely determines the performance of Massive MIMO. In a time division duplex (TDD) system or a frequency division duplex (frequency division duplex) system in which channel dissimilarity is not well met, a codebook is usually used to quantize CSI. Therefore, the codebook design is a key issue of Massive MIMO and is also a problem to be solved by the present invention.

The basic function of the LTE R13 MIMO codebook is to select a single codeword from a predefined codebook, or a beam selection technique. Generally, one codeword corresponds to one beam direction, that is, from multiple candidates. An optimal one of the codewords is selected as a CSI information in the form of a pre-coding matrix indicator (PMI). New Radio (NR) Massive MIMO puts forward higher requirements for channel state information feedback. The above mechanism can not meet the high precision CSI requirement of NR.

Summary of the invention

In order to meet the requirements of the NR Massive MIMO system for channel state information feedback, the present application provides a channel state information feedback method, a receiving end device and a transmitting end device.

A channel state information feedback method provided by the application includes:

The sending end device generates codebook indication information of the K layer transport layer; the K is greater than or equal to 2; the codebook indication information includes beam information of the K layer transport layer, beam superposition coefficient information of the m layer transport layer, and Km layer transmission Layer beam reference information; where 0 < m < K;

The sending end device sends the codebook indication information of the K layer transport layer.

The receiving end device receives the codebook indication information of the K layer transport layer, and generates a precoding vector of each layer of the K layer transport layer according to the indication information including the K layer transport layer codebook. In the implementation of the present application, when the transmitting device sends the K-layer transport layer codebook indication information, it is not necessary to report the beam information and the beam superposition coefficients of each transport layer, which can save feedback overhead.

Correspondingly, the application further provides a sender device, including:

a processor, configured to generate codebook indication information of a K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of an m layer transmission layer, and Km Reference information of the layer transport layer; where 0 < m < K;

And a transceiver, configured to send codebook indication information of the K layer transport layer generated by the processor.

In another aspect, the application further provides a receiving end device, including:

a transceiver for codebook indication information of a K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of an m layer transmission layer, and a Km layer Beam reference information of the transport layer; where 0 < m < K;

And a processor, configured to generate a precoding vector of each layer of the K layer transport layer according to the codebook indication information of the K layer transport layer.

It can be seen that, in the technical solution provided by the embodiment of the present invention, the codebook indication information generated by the transmitting end device and sent to the receiving end device includes the codebook indication information of the K layer transport layer; the K is greater than or equal to 2; The codebook indication information includes beam information of the K layer transmission layer, beam superposition coefficient information of the m layer transmission layer, and beam reference information of the Km layer transmission layer; where 0<m<K. The receiving end device can receive and generate a precoding vector of each layer in the K layer transmission layer according to the foregoing codebook indication information.

In a specific implementation process, the foregoing transmitting device may be an access device, such as a base station, or a terminal device; the receiving device may be a terminal device or an access device, such as a base station.

In a specific implementation process, the beam information may include information of multiple beams used to construct a precoding vector of each transport layer, such as a beam index of each beam.

In a specific implementation process, the beam superposition coefficient information of the m layer transport layer may include a set of beam superposition coefficients of each of the plurality of beams used to construct a precoding vector of each of the m layer transport layers. And including at least one of the following: a wideband superposition coefficient and a narrowband superposition coefficient, wherein the wideband superposition coefficient may include a wideband amplitude coefficient, and the narrowband superposition coefficient may include at least one of a narrowband amplitude coefficient and a narrowband phase coefficient.

In a specific implementation process, the beam reference information of the Km layer transport layer may include strength indicator information of the foregoing multiple beams used to construct a precoding vector of each transport layer in the Km layer transport layer, such as, but not limited to, the foregoing The intensity ranking information of each beam in the beams, or the information indicating the strongest beam, or the information indicating the strongest at least two beams and the strong ordering information of the at least two beams.

In a specific implementation process, for each transport layer in the Km layer transport layer, when the receiving end device generates the precoding vector corresponding to the transport layer, in addition to applying the beam reference information, reference may also be made to the layer in the m layer transport layer. Beam superposition coefficient information. For example, for the transport layer a in the above-described K-m layer transport layer, beam superposition coefficient information of the transport layer b in the above m-layer transport layer can be applied. Further, each of the plurality of beams of the precoding vector used to construct the transmission layer a may be determined according to the intensity of the beam in the plurality of beams, and determined in the multiple beams corresponding to the transmission layer b. Corresponding to the beam of intensity, and setting the beam superposition coefficient of each of the above beams of the transmission layer a according to the beam superposition coefficient of the determined beam. Further, the beam superposition coefficient of the determined beam may be used as the beam superposition coefficient of each of the above beams of the transmission layer a, and the beam of each of the above beams of the transmission layer a obtained by the above manner may also be adjusted. The positive and negative of the narrow-band phase coefficient in the superposition coefficient, that is, the narrow-band phase coefficient is inverted. In this way, the precoding vector of the transport layer a can be orthogonal to the precoding vector of the transport layer b. Further, the beam superposition coefficient of the strongest one or more beams of the transmission layer a may be set according to the beam superposition coefficient of the strongest one or more beams of the transmission layer b according to the above method, instead of The beam superposition coefficients of the respective beams of the transmission layer b correspondingly set the beam superposition coefficients of the respective beams of the transmission layer a. Further, for the other beams other than the strongest one or more beams, beam superposition coefficients adapted to the intensities of the beams, such as default beam superposition coefficients, may be set, thereby eliminating the need to correspond to the transmission layer b. The beam superposition coefficients of the intensity beams are used to set the beam superposition coefficients of the other beams described above.

Further, it can be known from the following formula:

among them,

by

with

Synthetic.

The plurality of beams simultaneously act on two polarization directions, wherein the upper left corner and the lower right corner of the block diagonal matrix W ₁ are respectively constructed by the same set of beams b ₀ -b ₃ . When setting the beam superposition coefficients of the respective beams of the transmission layer a according to the beam superposition coefficients of the respective beams of the transmission layer b, in addition to the setting as described in the previous paragraph, for the same beam, the transmission layer b is also required. The beam superposition coefficient in one polarization direction of the beam superposition coefficients of the beam is set to the beam superposition coefficient in the other polarization direction of the corresponding beam of the transmission layer a, and the narrowband phase coefficient is further inverted, and The beam superposition coefficient in the other polarization direction of the beam superposition coefficients of the beam of the transmission layer b is set to the beam superposition coefficient in one polarization direction of the corresponding beam of the transmission layer a without negating the narrow band phase coefficient. For example, if the secondary strong beam in the transmission layer b is b ₁ , the corresponding beam in the transmission layer a, that is, the secondary strong beam is b ₀ , and the beam superposition coefficient of the secondary strong beam b ₁ in the transmission layer b in one polarization direction is p ₁ c ₁ , the beam superposition coefficient in the other polarization direction is p ₅ c ₅ , then the beam superposition coefficient of the beam b ₀ of the transmission layer a is set correspondingly according to the beam superposition coefficient of the beam b ₁ of the transmission layer b When the beam superposition coefficient p ₁ c ₁ of the secondary strong beam b ₁ in the transmission layer b in one polarization direction should be used as the beam superposition coefficient in the other polarization direction of the beam b ₀ of the transmission layer a, similarly, transmission The beam superposition coefficient p ₅ c ₅ of the sub-strong beam in layer b, which is b ₁ in the other polarization direction, should be the beam superposition coefficient in the polarization direction of the beam b ₀ of the transmission layer a. Further, the beam superposition coefficient p ₁ c ₁ of the secondary strong beam b ₁ in the transmission layer b in one polarization direction is used as the beam superposition coefficient in the other polarization direction of the secondary strong beam b ₀ of the transmission layer a At the same time, the narrowband phase coefficient may be further inverted, and the beam superposition coefficient p ₅ c ₅ of the second strong beam b ₁ in the transmission layer b in the other polarization direction is used as the secondary strong beam b ₀ of the transmission layer a. When the beam is superimposed in a polarization direction, it is not necessary to invert the narrowband phase coefficient.

In a specific implementation process, for each transport layer in the Km layer transport layer, when the pre-coding vector corresponding to the transport layer is generated by the receiving end device, in addition to applying the beam reference information, the pre-preparation for constructing the transport layer may be The above plurality of beams of the coding vector apply beam-superimposing coefficients adapted to the intensities of these beams (obtained from the beam reference information), thereby eliminating the need to refer to the beam superposition coefficient information of the above m-layer transmission layer. These beam superposition coefficients may reflect the strength or contribution of the respective beams in the process of constructing the precoding vectors described above, in other words these beam superposition coefficients correspond to the strength or contribution of the corresponding beams in the construction of the precoding vectors described above.

On the other hand, the embodiment of the present application provides a base station, which has a function of realizing the behavior of the base station in the actual method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the base station includes a processor and a transceiver configured to support the base station to perform the corresponding functions in the above methods. The transceiver is configured to support communication between the base station and the terminal, and send information or signaling involved in the foregoing method to the terminal, and receive information or instructions sent by the base station. The base station can also include a memory for coupling with the processor that stores the necessary program instructions and data for the base station.

In another aspect, the embodiment of the present application provides a terminal, where the terminal has a function of implementing terminal behavior in the design of the foregoing method. The function can be implemented by hardware, and the structure of the terminal includes a transceiver and a processor. The corresponding software implementation can also be performed by hardware. The hardware or software includes one or more modules corresponding to the functions described above. The modules can be software and/or hardware.

In another aspect, an embodiment of the present application provides a control node, which may include a controller/processor, a memory, and a communication unit. The controller/processor may be used to coordinate resource management and configuration between multiple base stations, and may be used to perform the method of channel state information feedback described in the foregoing embodiments. The memory can be used to store program code and data for the control node. The communication unit is configured to support the control node to communicate with the base station, for example, to send information of the configured resource to the base station.

In another aspect, the transmitting end device and the receiving end device may be a chip, which includes a processor and an interface. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented by software, the The processor can be a general purpose processor implemented by reading software code stored in the memory, which can be integrated in the processor and can exist independently of the processor.

In another aspect, an embodiment of the present application provides a communication system, where the system includes the base station and the terminal in the foregoing aspect. Optionally, the control node in the above embodiment may also be included.

In a further aspect, the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the base station, which includes a program designed to perform the above aspects.

In a further aspect, the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the terminal, which includes a program designed to execute the above aspects.

The beneficial effects of the technical solution provided by the present application are:

The K-layer transmission layer codebook indication information is sent by the source device, and the codebook indication information does not quantize and report the beam superposition coefficients of all the transmission layers, but only reports the beam information and the beam superposition coefficient of the partial transmission layer and the remaining transmission layer. The beam reference information, therefore, the feedback and receiving techniques for implementing the channel state information provided by the present application can improve the transmission quality and save the feedback overhead of the system.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiments of the present application will be briefly described below. Obviously, the drawings described below are only some embodiments of the present application, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is an exemplary schematic diagram of a wireless communication network provided by the present application;

2 is a schematic flowchart of a channel state information feedback and reception method provided by the present application;

FIG. 3 is still another schematic diagram of a channel state information feedback and reception method provided by the present application; FIG.

4 is another schematic diagram of a channel state information feedback and reception method provided by the present application;

FIG. 5 is still another schematic diagram of a channel state information feedback and reception method provided by the present application; FIG.

6 is a schematic structural diagram of a source device provided by the present application;

FIG. 7 is a schematic structural diagram of a receiving end device provided by the present application.

detailed description

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the corresponding drawings.

FIG. 1 is an exemplary schematic diagram of a wireless communication network 100 in accordance with an embodiment of the present application. As shown in FIG. 1, the wireless communication network 100 includes base stations 102-106 and terminal devices 108-122, wherein the base stations 102-106 can pass backhaul links with each other (e.g., lines between base stations 102-106) Communication is shown, which may be a wired backhaul link (eg, fiber optic, copper) or a wireless backhaul link (eg, microwave). The terminal devices 108-122 can communicate with the corresponding base stations 102-106 via a wireless link (as indicated by the broken line between the base stations 102-106 and the terminal devices 108-122).

The base stations 102-106 are configured to provide wireless access services for the terminal devices 108-122. Specifically, each base station corresponds to a service coverage area (also referred to as a cell, as shown in each ellipse area in FIG. 1), and the terminal device entering the area can communicate with the base station by using a wireless signal to receive the base station. Wireless access service provided. There may be overlap between the service coverage areas of the base stations, and the terminal devices in the overlapping area may receive wireless signals from a plurality of base stations, so that the terminal devices can be served by multiple base stations at the same time. For example, multiple base stations may use Coordinated Multipoint (CoMP) technology to provide services for terminal devices in the overlapping area. For example, as shown in FIG. 1, the base station 102 overlaps with the service coverage area of the base station 104, and the terminal device 112 is within the overlapping area, so the terminal device 112 can receive the wireless signals from the base station 102 and the base station 104. Base station 102 and base station 104 can simultaneously provide services to terminal device 112. For another example, as shown in FIG. 1, the service coverage areas of the base station 102, the base station 104, and the base station 106 have a common overlapping area, and the terminal device 120 is within the overlapping area, so the terminal device 120 can receive the base station. The wireless signals 102, 104, and 106, the

base stations

102, 104, and 106 can simultaneously serve the terminal device 120.

The base station may be referred to as a Node B (NodeB), an evolved Node B (eNodeB), and an Access Point (AP), etc., depending on the wireless communication technology used. In addition, according to the size of the service coverage area provided, the base station can be further divided into a macro base station for providing a macro cell, a micro base station for providing a pico cell, and a femtocell for providing Femto cell) Femto base station. As wireless communication technologies continue to evolve, future base stations may use other names.

The terminal devices 108-118 are devices with wireless transceiving functions that can be deployed on land, including indoors or outdoors, handheld, wearable or on-board; can also be deployed on the water surface (such as ships), and can also be deployed in the air (eg, Aircraft, balloons and satellites, etc.) The terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and industrial control ( Wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, transportation safety A wireless terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like. The embodiment of the present application does not limit the application scenario. A terminal device may also be referred to as a user equipment (UE), an access terminal device, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a terminal device, Wireless communication device, UE proxy or UE device, and the like.

The base stations 102-106 and the terminal devices 108-122 can be configured with multiple antennas to support MIMO (Multiple Input Multiple Output) technology. Further, the terminal devices 108-122 can support single-user MIMO (SU-MIMO) technology or multi-user MIMO (Multi-User MIMO, MU-MIMO), where MU-MIMO can be based on Implemented by Space Division Multiple Access (SDMA) technology. Due to the configuration of multiple antennas, the base stations 102-106 and the terminal devices 108-122 can also flexibly support Single Input Single Output (SISO) technology, Single Input Multiple Output (SIMO) and multiple input. Multiple Input Single Output (MISO) technology to implement various diversity (such as but not limited to transmit diversity and receive diversity) and multiplexing techniques, where diversity techniques may include, for example, but not limited to, Transmit Diversity (TD) technology and Receive Diversity (RD) technology, the multiplexing technology can be a spatial multiplexing (Spatial Multiplexing) technology. Moreover, the foregoing various technologies may also include various implementation schemes. For example, currently used transmit diversity may include, for example, but not limited to, Space-Time Transmit Diversity (STTD), Space-Frequency Transmit Diversity (Space-Frequency Transmit). Diversity, SFTD), Time Switched Transmit Diversity (TSTD), Frequency Switching Transmit Diversity (FSTD), Orthogonal Transmit Diversity (OTD), Cyclic Delay Diversity , CDD) equal diversity, and the diversity methods obtained by deriving, evolving, and combining the various diversity methods described above. For example, the current LTE (Long Term Evolution) standard adopts a transmit diversity method such as Space Time Block Coding (STBC), Space Frequency Block Coding (SFBC), and CDD.

In addition, the base station 102 and the terminal devices 104-110 can communicate using various wireless communication technologies, such as, but not limited to, Time Division Multiple Access (TDMA) technology, Frequency Division Multiple Access (FDMA). Technology, Code Division Multiple Access (CDMA) technology, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Orthogonal Frequency Division Multiple Access (OFDMA) technology Single carrier frequency division multiple access (Single Carrier FDMA, SC-FDMA) technology, Space Division Multiple Access (SDMA) technology, and evolution and derivative technologies of these technologies. The above wireless communication technology is adopted as a radio access technology (RAT) by many wireless communication standards, thereby constructing various wireless communication systems (or networks) well known today, including but not limited to Global System for Mobile Communications (GSM), CDMA2000, Wideband CDMA (WCDMA), WiFi defined by the 802.11 series of standards, Worldwide Interoperability for Microwave Access (WiMAX), long-term Evolution (Long Term Evolution, LTE), LTE-Advanced (LTE-A), and evolution systems of these wireless communication systems. The wireless communication network shown in FIG. 1 may be any system or network in the above wireless communication system. The technical solutions provided by the embodiments of the present application can be applied to the above various wireless communication technologies and wireless communication systems unless otherwise specified. Furthermore, the terms "system" and "network" can be replaced with each other.

It should be noted that the wireless communication network 100 shown in FIG. 1 is for example only and is not intended to limit the technical solution of the present application. It should be understood by those skilled in the art that in a specific implementation process, the wireless communication network 100 further includes other devices, and the number of base stations and terminal devices may also be configured according to specific needs.

In the above-mentioned wireless communication network 100, the network device, for example, the base station, needs to obtain the channel state information, and the terminal needs to report the accurate CSI. Generally, the channel state information is reported to the base station in the form of a precoding codebook.

Before the implementation of the present application is described in detail, the precoding codebook is first described as follows. In addition, the related art in the present application is in the Chinese application number 201710284175.3, and the invention name is "a method and device for indicating and determining a precoding vector". There are introductions, which can be referred to in full text.

Based on the high-precision CSI feedback of the beam combination mechanism, the pre-encoded codebook can be represented as a two-level codebook structure:

W=W ₁ ×W ₂

Where W ₁ contains a beam index and a broadband superposition coefficient that require feedback, and W ₂ includes a narrow-band superposition coefficient. The wideband superposition coefficient corresponds to the quantization of the wideband amplitude, and the narrowband superposition coefficient corresponds to the quantization of the narrowband amplitude and the narrowband phase.

The following is a simple example of a two-level codebook form:

among them,

by

with

Synthetic.

In the above example, p ₀ to p ₇ are the broadband superposition coefficients included in W ₁ in the foregoing description, and represent the quantization of the wideband amplitude. α ₀ ~ α ₇ and θ ₀ ~ θ ₇ representing the narrowband quantized narrowband amplitude and phase of the synthesized narrowband constituting the superposition coefficients W ₂ included.

The above scheme describes a precoding codebook corresponding to one transport layer (rank1). For a precoding codebook of a K layer transport layer (rank-K), the W2 codebook matrix will be K columns, and the corresponding W2 feedback overhead will be K times of rank1.

Specifically, for a pre-coded codebook of a K-layer transport layer (rank-K), a codebook of a transport layer may be expressed as:

Where b _i is the beam used to represent the CSI selection when using the beam combination method.

For the broadband amplitude coefficient,

For the narrowband amplitude coefficient,

Is a narrowband phase coefficient, where 0 < i < L, L is the number of beams in each transport layer.

If the codebook elements corresponding to each transport layer are independently quantized, the overhead of the feedback will increase sharply. Therefore, to reduce the overhead, the same set of beams b _i can be used to construct the codebook of each layer in the K-layer transport layer, that is, K. Each layer codebook in the layer transport layer codebook uses the same set of beams b _i .

The present application provides a channel state information feedback and reception method that can achieve low overhead. Specifically, in the foregoing wireless communication network 100, the channel state information feedback and reception method provided by the present application is implemented, including the following steps:

Step 200: The source device generates codebook indication information of the K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of an m layer transmission layer, and Beam reference information of the Km layer transmission layer; where 0 < m < K;

The K layer transmission layer beam information is used to indicate a group of beams b1 to b4. For example, the beam information may be an index of b1 to b4. In other words, the same set of beams b1 to b4 can be used to construct the codebook of each layer in the K layer transport layer, that is, each layer codebook in the K layer transport layer codebook uses the same set of beams b1 to b4.

The beam superposition coefficient information of the m layer transmission layer includes coefficients of each of the above beams b1 to b4 for generating precoding vectors of each of the m layer transmission layers. For example, for each transport layer in the m-layer transport layer, the beam superposition coefficient information of the transport layer may include, for example but not limited to, at least one of the following values: a quantized value of the wideband amplitude coefficient, a narrowband amplitude coefficient The quantized value and the quantized value of the narrowband phase coefficient. In some codebook structures, the beam superposition coefficient information usually includes quantized values of narrowband superposition coefficient quantized values and narrowband phase coefficients, and some codebook structures are also designed with quantized values of wideband superposition coefficients.

The beam reference information of the Km layer transport layer may have two representation manners, one is the strength and weakness order indication information of each beam in each transport layer of the Km layer transport layer; taking a group of beams b1 to b4 as an example, at Km In a transport layer of a layer transport layer, its order is strong and weak, and its order is b2, b3, b4, b1, and in another transport layer, its order is strong or weak. For b4, b2, b1, b3.

The other is the strongest beam indication in each transmission layer of the K-m layer transmission layer, and specifically may be the location information of the beam in the L beams of the transmission layer, where L is greater than or equal to 2. Taking a group of beams b1 to b4 as an example, in one transmission layer of the K-m layer transmission layer, the strongest beam is b2, and its position in the beams b1 to b4 is located at the second position. In the other transmission layer, the strongest beam is b4 in the order from strong to weak, and its position in the beams b1 to b4 is at the 4th position.

Step 201: The sending end device sends the codebook indication information of the K layer transport layer.

Step 202: The receiving end device receives the codebook indication information of the K layer transport layer.

Step 203: The receiving end device generates, according to the codebook indication information of the K layer transport layer, a precoding vector of each layer of the K layer transport layer.

For example, when the beam superposition coefficient information of the codebook indication information sent by the transmitting end does not include the broadband superposition coefficient, the receiving end device determines according to the beam information of the K layer transmission layer and the narrowband superposition coefficient of the m layer transmission layer. a precoding vector of the m layer transport layer.

For example, when the beam superposition coefficient information of the codebook indication information sent by the transmitting end includes the broadband superposition coefficient, the receiving end device according to the beam information of the K layer transmission layer, and the narrowband superposition coefficient of the m layer transmission layer a broadband superposition coefficient, determining a precoding vector of the m layer transmission layer;

For each layer of the K-m layer transport layer, the corresponding precoding vector of each layer can be obtained in various ways.

One way is that the beam superposition coefficients of the respective beams of the Km layer transmission layer are default values, and the default values of the respective beam superposition coefficients correspond to the strength and weak relationship of each beam; another way is that m The beam superposition coefficients of the respective beams of the layer transport layer are assigned to the respective beams of the Km layer according to a certain mapping relationship, thereby determining the precoding vector of the Km layer transport layer.

The mapping of the wideband amplitude coefficient or the narrowband amplitude coefficient of each element in the precoding codebook is:

Using a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a first polarization direction of the xth transmission layer in the m layer transmission layer as a start vector; and a second of the yth transmission layer in the Km layer transmission layer a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a polarization direction as a target vector;

a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a second polarization direction of the xth transmission layer in the m layer transmission layer is used as a starting vector; and a number of the yth transmission layer in the Km layer transmission layer A broadband amplitude coefficient or a narrowband amplitude coefficient vector of a polarization direction is used as a target vector.

If the beam reference information of the Km layer transmission layer sent by the transmitting device includes the strength indication information of each beam in each layer of the Km layer transmission layer, the receiving end device generates a precoding code of each layer of the Km layer transmission layer. At this time, the beam superposition coefficient may be obtained by referring to the strong and weak indication information, or the strong indication information may not be referred to;

When the beam superposition coefficient is obtained by referring to the strong and weak indication information, one way is to assign an element corresponding to the t-th strong beam in the starting vector to a corresponding element of the t-th strong beam in the target vector. That is to say, after the beams are sorted according to strength, the corresponding elements in the starting vector are assigned to the corresponding elements in the target vector.

Specifically, the above-mentioned broadband amplitude coefficient, narrowband amplitude coefficient and narrowband phase coefficient are specifically expressed as shown in Table 1:

Table 1

As shown in Table 1, the number of transport layer layers is K=8, and m=3, then K-m=5. For convenience of description, any one of m=3 may be referred to as a first type of transport layer, and any of K-m=5 may be referred to as a second type of transport layer. The beam information is b1 to b4. The beam information is applicable to any of the first type of transport layer and to any of the second type of transport layers. The beam superposition coefficient information of the first type of transport layer is as shown in Table 1.

The beam intensity in the transport layer 1 is b1, b3, b2, b4 in order from strong to weak, and the wide-band amplitude coefficients are X11, X21, X31, X41, and the narrow-band amplitude coefficients are X12, X22, X32, X42; narrow band The phase coefficients are X13, X23, X33, X43;

The beam intensity in the transmission layer 2 is b3, b4, b1, b2 in order from strong to weak, and the broadband amplitude coefficients are Y11, Y21, Y31, Y41, and the narrowband amplitude coefficients are Y12, Y22, Y32, Y42; narrow band The phase coefficients are Y13, Y23, Y33, Y43;

The beam intensity in the transmission layer 3 is b3, b1, b4, b2 in order from strong to weak, and the broadband amplitude coefficients are Z11, Z21, Z31, Z41, and the narrowband amplitude coefficients are Z12, Z22, Z32, Z42; narrow band The phase coefficients are Z13, Z23, Z33, Z43;

The beam intensity of the transport layer 4 is b2, b1, b3, b4 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b1, b3, b2, b4 of the transport layer 1, specifically, the broadband amplitude thereof. The coefficients are X11, X21, X31, X41, the narrowband amplitude coefficients are X12, X22, X32, X42; the narrowband phase coefficients are X13, X23, X33, X43;

The beam intensity of the transmission layer 5 is b2, b3, b1, b4 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b3, b4, b1, b2 of the transmission layer 2, specifically, the broadband amplitude thereof. The coefficients are Y11, Y21, Y31, Y41, the narrowband amplitude coefficients are Y12, Y22, Y32, Y42; the narrowband phase coefficients are Y13, Y23, Y33, Y43;

The beam intensity of the transmission layer 6 is b3, b2, b1, b4 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b3, b1, b4, b2 of the transmission layer 3, specifically, the broadband amplitude thereof. The coefficients are Z11, Z21, Z31, Z41, the narrow band amplitude coefficients are Z12, Z22, Z32, Z42; the narrow band phase coefficients are Z13, Z23, Z33, Z43;

The beam intensity of the transport layer 7 is b4, b3, b2, b1 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b1, b3, b2, b4 of the transport layer 1, specifically, the broadband amplitude thereof. The coefficients are X11, X21, X31, X41, the narrowband amplitude coefficients are X12, X22, X32, X42; the narrowband phase coefficients are X13, X23, X33, X43;

The beam intensity of the transmission layer 8 is b1, b2, b3, b4 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b3, b4, b1, b2 of the transmission layer 2, specifically, the broadband amplitude thereof. The coefficients are Y11, Y21, Y31, Y41, the narrowband amplitude coefficients are Y12, Y22, Y32, Y42; the narrowband phase coefficients are Y13, Y23, Y33, Y43;

In addition, in a specific implementation process, when the beam superposition coefficients of the second type of transport layer are set with reference to the first type of transport layer, the positive and negative of the beam superposition coefficients of the second type of transport layer may be adjusted (eg, the narrowband phase may be adjusted) The positive and negative coefficients of the coefficients), the precoding vectors and the beam superposition coefficients of the first type of transport layer are orthogonal to the precoding vectors of the second type of transport layer set according to the beam superposition coefficients of the first type of transport layer, To reduce interference between the first transport layer and the second transport layer.

Specifically, if the beam superposition coefficient of the second type of transmission layer is set by referring to the beam superposition coefficient of the first type of transmission layer, the beam superposition coefficient of the strongest beam among the beams corresponding to the first type of the transmission layer may be set. The beam superposition coefficient of the strongest beam of the second type of transmission layer is changed, and the positive and negative of the narrowband phase coefficient of the second type of transmission layer are changed; for other intensity beams, the first type of transmission layer may be referred to by the above method. The beam superposition coefficients of the beams of the corresponding intensity in the corresponding beam are set to the beam superposition coefficients of the respective intensity beams of the second type of transmission layer, and the positive and negative of the narrow band phase coefficients of the second type of transmission layer are changed. For example, if the above Table 1 is optimized according to the above method, the following Table 2 can be obtained:

Table 2

In this way, the transport layer 1 can be made orthogonal to the transport layer 4 and the transport layer 7, the transport layer 2 is orthogonal to the transport layer 5 and the transport layer 8, and the transport layer 3 is orthogonal to the transport layer 6.

It can be seen that the beam superposition coefficients of the at least one second type of transmission layer are set according to the beam superposition coefficients of the first type of transmission layer, and the positive and negative beam superposition coefficients of the at least one second type of transmission layer are set. Sex changes.

In this implementation manner, the transmitting end device does not need to report the wideband superposition coefficient and the narrowband superposition coefficient of the beam of each transmission layer, and only needs to report the transmission layer 1 and the transmission layer 2, and the broadband superposition of the beam of the transmission layer 3 The coefficient and the narrowband superposition coefficient may be, and the receiving end device performs mapping processing according to the beam information of the multiple beams and the narrowband superposition coefficient of the partial transmission layer, so that the narrowband superposition coefficient or the broadband superposition coefficient of all the transmission layers can be obtained, thereby saving feedback Overhead.

In another implementation manner, if the beam reference information of the Km layer transport layer sent by the sending end device includes location information of the strongest beam in each of the L m beams in each of the transport layers of the Km layer transport layer The receiving device assigns the strongest beam corresponding element in the starting vector to the element corresponding to the strongest beam in the target vector; for the element other than the corresponding element of the starting vector with the strongest beam in the starting vector, according to the positional relationship The one-to-one correspondence principle, or according to the principle of random assignment, assigns it to elements other than the element corresponding to the strongest beam in the target vector.

In another implementation manner, the receiving end device assigns the most strong beam corresponding element in the starting vector to the element corresponding to the strongest beam in the target vector; assigns the corresponding element of the second strong beam in the starting vector to the target vector. The element corresponding to the strong beam; the other elements are assigned according to the principle of one-to-one correspondence of positional relationships, or according to the principle of random assignment.

In this implementation, the beams need not be ranked according to strength and strength, only the strongest beam needs to be focused, and then the elements corresponding to the strongest beam in the starting vector are assigned to the elements corresponding to the strongest beam in the target vector. The elements corresponding to other beams in the starting vector are randomly assigned or the elements corresponding to other beams in the target vector may be given according to the principle of one-to-one correspondence of positional relationships.

In this way, the transmitting end device does not need to report the wideband superposition coefficient and the narrowband superposition coefficient information of the beam of each transmission layer, and the receiving end device performs mapping processing according to the beam information and the broadband and narrowband beam superposition coefficients of the partial transmission layer. The wideband and narrowband beam superposition coefficients of all transmission layers can be obtained, thereby obtaining the broadband and narrowband superposition coefficients of each element of the precoding codebook, thereby saving feedback overhead and ensuring the y-stream and m-layer transmission of the Km layer transmission layer. The xth layer of transport layers in the layer are orthogonal.

The mapping processing manner of the narrowband phase coefficient of each element in the precoding codebook is: the receiving end device takes the narrowband phase coefficient vector of the first polarization direction of the xth transmission layer in the m layer transmission layer a start vector; a narrowband phase coefficient vector of a second polarization direction of the yth transmission layer in the Km layer transport layer is used as a target vector;

Using a narrowband phase coefficient vector of a second polarization direction of the xth transmission layer in the m layer transmission layer as a starting vector; and a first pole of the yth transmission layer in the Km layer transmission layer The narrow-band phase coefficient vector of the direction is used as the target vector.

Then, the receiving end device assigns the fth element of the first polarization direction of the narrowband phase coefficient vector of the xth transmission layer in the m layer transmission layer to the narrow band of the yth transmission layer in the Km layer transmission layer The fth element of the first polarization direction of the phase coefficient vector; after multiplying the fth element of the second polarization direction of the narrowband phase coefficient vector of the xth transmission layer of the m layer transmission layer by -1, The fth element of the second polarization direction assigned to the narrowband phase coefficient vector of the yth transmission layer of the Km layer transmission layer.

To describe in detail the implementation process of the above channel state information feedback and reception method in the present application, a more specific description will be made below.

Embodiment 1

When the number of beams L=4, the number of transmission layers is k=4; when the superposition coefficients of beam superposition include wideband and narrowband superposition coefficients:

The first way is: the broadband and narrowband coefficient vectors of the third transmission layer are determined by the first transmission layer; the broadband and narrowband coefficient vectors of the fourth transmission layer are determined by the second transmission layer;

The second way is: the broadband and narrowband coefficient vectors of the third transmission layer are determined by the second transmission layer; the broadband and narrowband coefficient vectors of the fourth transmission layer are determined by the first transmission layer;

In the following, the first method is taken as an example, and the second mode is the same as the principle. The specific figure is shown as 3:

The mapping relationship in the first embodiment is:

Assign the strongest beam corresponding element in the starting vector to the element corresponding to the strongest beam in the target vector; assign the most powerful beam corresponding element in the starting vector to the strongest beam corresponding element of the target vector starting vector; The elements in the starting vector other than the corresponding elements of the strongest beam of the starting vector are assigned to the target vector in addition to the elements corresponding to the strongest beam according to the principle of one-to-one correspondence of positional relationships or according to the principle of random assignment. Elements;

For narrowband phase coefficient vectors, the mapping is:

The narrowband phase coefficient vector of the third transmission layer, the fth element of the first polarization direction is the same as the fth element of the first polarization direction of the narrowband phase coefficient vector of the first transmission layer; The narrowband phase coefficient vector of the transmission layer, the fth element of the second polarization direction, is equal to the fth element of the second polarization direction of the narrowband phase coefficient vector of the first transmission layer multiplied by -1.

The narrowband phase coefficient vector of the fourth transmission layer, the fth element of the first polarization direction is the same as the fth element of the first polarization direction of the narrowband phase coefficient vector of the second transmission layer; The narrowband phase coefficient vector of the transmission layer, the fth element of the second polarization direction, is equal to the fth element of the second polarization direction of the narrowband phase coefficient vector of the second transmission layer multiplied by -1.

Embodiment 2

Taking the first mode as an example, the mapping relationship in the second embodiment is: the replacement relationship between the start vector and the target vector is to sequentially assign the element corresponding to the t-th strong beam in the start vector to the t-th strong in the target vector. The corresponding element of the beam.

Specifically, as shown in FIG. 4, the element corresponding to the third strong beam of the first transport layer is assigned to the element corresponding to the third strong beam in the third transport layer; the first of the first transport layer is The element corresponding to the strong beam is assigned to the element corresponding to the first strong beam in the third transport layer; the element corresponding to the fourth strong beam of the first transport layer is assigned to the fourth strongest in the third transport layer An element corresponding to the beam; an element corresponding to the second strong beam of the first transport layer is assigned to an element corresponding to the second strong beam of the third transport layer;

The replacement relationship between the fourth transport layer and the second transport layer is the same, and will not be described again.

Similarly, for a narrowband phase coefficient vector, the mapping relationship is (not shown):

Embodiment 3

When the number of beams L=4, the number of transmission layers is k=4; when the superposition coefficient of the beam superposition only includes the narrowband superposition coefficients, as shown in FIG. 5:

The first way is: the narrowband coefficient vector of the third transmission layer is determined by the first transmission layer; the narrowband coefficient vector of the fourth transmission layer is determined by the second transmission layer;

The second way is: the narrowband coefficient vector of the fourth transmission layer is determined by the first transmission layer; the narrowband coefficient vector of the third transmission layer is determined by the second transmission layer;

Taking the first method as an example, the mapping relationship is: assigning the strongest beam corresponding element in the starting vector to the element corresponding to the strongest beam in the target vector; assigning the most powerful beam corresponding element in the starting vector to the target element The target vector starting vector is the strongest beam corresponding element; for the elements other than the starting element of the strongest beam in the starting vector, according to the principle of one-to-one correspondence of positional relations, or according to the principle of random assignment, assign it to An element other than the element corresponding to the strongest beam in the target vector.

The channel state information feedback method provided by the embodiment of the present application is described in the above, with reference to FIG. 1 to FIG. 5 . It should be understood that the steps or operations shown in the methods of the foregoing various embodiments may be used as an example only. Perform other operations or deformations of various operations. Also, in the specific implementation, the various steps may be performed in a different order than that described in the embodiments of the present application, and may not perform all the operations or steps shown in the embodiments of the present application. Alternatively, it is also possible to perform more of the operations or steps shown in the various embodiments of the present application.

It should also be understood that, in various embodiments of the present application, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be implemented in the present application. The implementation of the examples constitutes any limitation.

Further, it can be known from the following formula:

among them,

by

with

Synthetic.

Hereinafter, the sender device and the sink device provided by the embodiments of the present application will be described. In a specific implementation, the sending end device of the present application may be a terminal, and the receiving end device may be a network device.

Referring to FIG. 6, the terminal 500 provided by the embodiment of the present application includes at least a processor 504 and a transceiver 508.

The processor 504 is configured to generate codebook indication information of the K layer transmission layer, where the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of the m layer transmission layer, and Reference information of the Km layer transport layer; where 0 < m < K;

The transceiver 508 is configured to send codebook indication information of the K layer transport layer generated by the processor;

The beam superposition coefficient information of the m layer transmission layer includes: a narrow band superposition coefficient of the m layer transmission layer, or further, according to the codebook design, a broadband superposition coefficient may further be included. The beam reference information of the K-m layer transport layer includes: a beam strength ordering indication of each layer of the transport layer or a strongest beam indicator of each layer of the transport layer.

The above transceiver 508 can be used to perform the actions of the terminal to transmit or transmit to the network device described in the foregoing method embodiments, and the processor 504 can be used to perform the actions implemented by the terminal as described in the foregoing method embodiments. For details, please refer to the description in the previous method embodiments, and details are not described herein again.

The terminal can also include a memory 519 that stores computer-executed instructions; the processor 504 and the memory 519 can be integrated into a processing device, and the processor 504 can execute the program code stored in the memory 519 to implement the functions described above. The memory 519 can also be integrated in the processor 504 when implemented.

The terminal may further include a power source 512 for providing power to various devices or circuits in the terminal. The terminal may include an antenna 510 for transmitting uplink data or uplink control signaling output by the transceiver 508 through the wireless signal.

In addition, in order to make the function of the terminal more perfect, the terminal may further include one or more of an input unit 514, a display unit 516, an audio circuit 518, a camera 520, a sensor 522, and the like, and the audio circuit may further include Speaker 5182, microphone 5184, and the like.

Referring to FIG. 7, the network device provided by the embodiment of the present application includes at least a processor 604 and a transceiver 608.

The transceiver 608 is used for codebook indication information of a K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, and beam superposition coefficient information of an m layer transmission layer, And beam reference information of the Km layer transmission layer; wherein 0 < m < K;

The processor 604 is configured to determine, according to beam information of the K layer transmission layer, beam superposition coefficient information of the m layer transmission layer, a precoding vector of the m layer transmission layer;

The receiving end device determines a precoding vector of the K-m layer transport layer according to the precoding vector of the m layer transport layer and the beam reference information of the K-m layer transport layer.

In a specific implementation, the network device may further include a memory 603, configured to save codebook indication information received by the transceiver 608 or save a precoding vector processed by the processor 604;

The processor 604 and the memory 603 may be combined to form a processing device, and the processor 604 is configured to execute the program code stored in the memory 603 to implement the above functions. The memory 603 can also be integrated in the processor 604 when implemented.

In a specific implementation, the beam superposition coefficient information of the m-layer transmission layer sent by the transceiver 608 includes a narrow-band superposition coefficient of the m-layer transmission layer or a broadband superposition coefficient further including an m-layer transmission layer.

The broadband superposition coefficient includes: a wideband amplitude coefficient; the narrowband superposition coefficient includes: a narrowband amplitude coefficient and a narrowband phase coefficient.

The beam reference information of the Km layer transmission layer includes: a beam strength ordering indication of each layer of the transmission layer or a strongest beam indication of each layer of the transmission layer, where the strongest beam indication may be the strongest beam in all beams. location information.

The processor 604, the specific receiving end device determines a precoding vector of the m layer transport layer according to beam information of the K layer transport layer and a narrowband superposition coefficient of the m layer transport layer;

Or further, the processor 604 determines a precoding vector of the m layer transport layer according to beam information of the K layer transport layer, and a narrowband superposition coefficient and a broadband superposition coefficient of the m layer transport layer.

The processor 604 is further configured to determine a precoding vector of the K-m layer transport layer according to the precoding vector of the m layer transport layer and the beam reference information of the K-m layer transport layer. Specifically, the processor 604 maps the broadband superposition coefficient or the narrowband superposition coefficient of the beam of the m layer transmission layer to the foregoing according to the mapping rule and the beam reference information of the Km layer transmission layer except the m layer transmission layer. Broadband superposition coefficient or narrowband superposition coefficient of the beam in the Km layer transmission layer.

For a wideband amplitude coefficient or a narrowband amplitude coefficient, in one implementation, the processor 604 sets a wideband amplitude coefficient or a narrowband amplitude coefficient of a first polarization direction of the xth transmission layer in the m layer transmission layer. a vector as a starting vector; a wideband amplitude coefficient or a narrowband amplitude coefficient vector of a second polarization direction of the yth transmission layer in the Km layer transmission layer is used as a target vector;

Or, in another implementation manner, a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a second polarization direction of the xth transmission layer in the m layer transmission layer is used as a starting vector; A broadband amplitude coefficient or a narrowband amplitude coefficient vector of a first polarization direction of the yth transmission layer in the transmission layer is used as a target vector.

When assigning an element corresponding to a beam in a starting vector to an element corresponding to a beam in a target vector, a specific implementation manner is:

An element corresponding to the t-th strong beam in the start vector is assigned to a corresponding element of the t-th strong beam in the target vector.

In another implementation manner, the element corresponding to the strongest beam in the starting vector is assigned to the element corresponding to the strongest beam in the target vector; and the first in the starting vector except the corresponding element of the strongest beam The f elements are assigned to the fth element of the target vector except the corresponding element of the strongest beam, where 0<f<L.

For the narrowband phase coefficient, the processor 604 uses a narrowband phase coefficient vector of a first polarization direction of the xth transmission layer in the m layer transmission layer as a start vector; and the Km layer in the transport layer a narrowband phase coefficient vector of the second polarization direction of the yth transmission layer as a target vector;

Or using a narrowband phase coefficient vector of a second polarization direction of the xth transport layer in the m layer transport layer as a start vector; and a first type of the yth transport layer in the transport layer of the Km layer The narrowband phase coefficient vector of the polarization direction is used as the target vector.

Then, the processor 604 assigns the fth element of the first polarization direction of the narrowband phase coefficient vector in the start vector to the first polarization direction of the narrowband phase coefficient vector in the target vector. a f-th element; after multiplying the f-th element of the second polarization direction of the narrow-band phase coefficient vector in the start vector by -1, assigning to the second of the narrow-band phase coefficient vectors in the target vector The fth element of the polarization direction.

The network device may further include an antenna 610, configured to send downlink data or downlink control signaling output by the transceiver 608 by using a wireless signal.

It should be noted that the processor 504 of the terminal and the processor 604 of the network device may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and an NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination.

The memory 12 of the terminal and the memory 22 of the network device may include a volatile memory, such as a random access memory (RAM), and may also include a non-volatile memory. For example, a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); the memory may further include a combination of the above types of memories.

The network device in the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the terminal may correspond to the terminal in the method embodiment of the present application. In addition, the above-mentioned and other operations and/or functions of the respective modules of the network device and the terminal are respectively implemented in order to implement the corresponding processes of the foregoing method embodiments. For the sake of brevity, the description of the method embodiments of the present application may be applied to the device embodiment, and Let me repeat.

Implementing the channel state information feedback technology provided by the present application, the K-layer transmission layer codebook indication information is sent by the source device, where the codebook indication information only includes beam index information of multiple beams and narrowband superposition coefficients of a part of the transmission layer, and The wideband superposition coefficient and the narrowband superposition coefficient of each order beam are not reported, and the receiving end device performs mapping processing according to the beam index information of the multiple beams and the narrowband superposition coefficient of the partial transmission layer, and then obtains all the transmission layers. The narrowband superposition coefficient, if there is a broadband superposition coefficient, can also obtain the broadband superposition coefficient of all transmission layers through mapping processing. Therefore, implementing the feedback technology of the channel state information provided by the present application can improve the transmission quality and save the system. Feedback overhead.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

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

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

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

A channel state information feedback method, comprising:

The sending end device generates codebook indication information of the K layer transport layer; the K is greater than or equal to 2; the codebook indication information includes beam information of the K layer transport layer, beam superposition coefficient information of the m layer transport layer, and Km layer transmission Layer beam reference information; where 0 < m < K;

The sending end device sends the codebook indication information of the K layer transport layer.
A sender device, comprising:

a processor, configured to generate codebook indication information of a K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of an m layer transmission layer, and Km Reference information of the layer transport layer; where 0 < m < K;

And a transceiver, configured to send codebook indication information of the K layer transport layer generated by the processor.
The channel state information feedback method according to claim 1 or the source device according to claim 2, wherein the beam superposition coefficient information of the m layer transmission layer comprises: a narrowband superposition coefficient of the m layer transmission layer.
The channel state information feedback method according to claim 1 or the source device according to claim 2, wherein the beam superposition coefficient information of the m layer transmission layer comprises: a broadband superposition coefficient of the m layer transmission layer.
The channel state information feedback method according to claim 1 or the source device according to claim 2, wherein the beam reference information of the Km layer transmission layer comprises: a beam strength ordering indication of each layer of the transmission layer .
The channel state information feedback method according to claim 1 or the source device according to claim 2, wherein the beam reference information of the Km layer transmission layer comprises: a strongest beam indication of each layer of the transmission layer or At least two of the strongest beam indications.
A channel state information receiving method, the method comprising:

The receiving end device receives the codebook indication information of the K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of the K layer transmission layer, beam superposition coefficient information of the m layer transmission layer, and Km layer transmission. Layer beam reference information; where 0 < m < K;

The codebook indication information of the K layer transmission layer of the receiving end device generates a precoding vector of each layer of the K layer transmission layer.
A receiving end device, comprising:

a transceiver for codebook indication information of a K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of an m layer transmission layer, and a Km layer Beam reference information of the transport layer; where 0 < m < K;

And a processor, configured to generate a precoding vector of each layer of the K layer transport layer according to the codebook indication information of the K layer transport layer.
The channel state information receiving method according to claim 7 or the receiving end device according to claim 8, wherein the beam superposition coefficient information of the m layer transmission layer comprises: a narrow band superposition coefficient of the m layer transmission layer.
The channel state information receiving method according to claim 7 or the receiving end device according to claim 8, wherein the beam superposition coefficient information of the m layer transmission layer comprises: a broadband superposition coefficient of the m layer transmission layer.
The channel state information receiving method according to claim 7, or the receiving end device according to claim 8, wherein the beam reference information of the K-m layer transport layer comprises: a beam strength ordering indication of each layer of the transport layer.
The channel state information receiving method according to claim 7 or the receiving end device according to claim 8, wherein the beam reference information of the Km layer transport layer comprises: a strongest beam indication of each layer of the transport layer or At least two of the strongest beam indications.
The channel state information receiving method according to claim 9, or the receiving end device, wherein the precoding vector of each layer of the K layer transmission layer is generated according to the codebook indication information of the K layer transmission layer ,include:

The receiving end device determines a precoding vector of the m layer transport layer according to beam information of the K layer transport layer and a narrowband superposition coefficient of the m layer transport layer.
The channel state information receiving method or the receiving end device according to claim 10, wherein the K layer transport layer codebook indication information generates a precoding vector of each layer of the K layer transport layer, including:

The receiving end device determines a precoding vector of the m layer transport layer according to beam information of the K layer transport layer, and a narrowband superposition coefficient and a broadband superposition coefficient of the m layer transport layer.
The channel state information receiving method or the receiving end device according to claim 13 or 14, wherein the receiving end device generates precoding of each layer of the K layer transport layer according to the K layer transport layer codebook indication information. Vector, including:

The receiving end device maps the broadband superposition coefficient or the narrowband superposition coefficient of the beam of the m layer transmission layer to the broadband of the beam in the Km layer transmission layer according to the beam information of the K layer transmission layer and the beam reference information of the Km layer transmission layer. A superposition coefficient or a narrowband superposition coefficient is obtained to obtain a precoding vector of the Km layer transmission layer.
The channel state information receiving method or the receiving end device according to claim 15, further comprising:

Using a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a first polarization direction of the xth transmission layer in the m layer transmission layer as a starting vector; and a yth transmission layer in the Km layer transmission layer a broadband amplitude coefficient or a narrowband amplitude coefficient vector of the second polarization direction as a target vector;

Using a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a second polarization direction of the xth transmission layer in the m layer transmission layer as a starting vector; and a yth transmission layer in the Km layer transmission layer The broadband amplitude coefficient or the narrowband amplitude coefficient vector of the first polarization direction is used as the target vector.
The channel state information receiving method or the receiving end device according to claim 16, wherein the receiving end device refers to the mapping rule and beam reference information of a Km layer transport layer other than the m layer transport layer. The broadband superposition coefficient or the narrow-band superposition coefficient of the beam of the m-layer transmission layer is mapped to the broadband superposition coefficient or the narrow-band superposition coefficient of the beam in the transmission layer of the Km layer, and specifically includes:

An element corresponding to the t-th strong beam in the start vector is assigned to a corresponding element of the t-th strong beam in the target vector.
The channel state information receiving method or the receiving end device according to claim 16, wherein the receiving end device according to the mapping rule and the beam reference information of the Km layer transport layer except the m layer transport layer The broadband superposition coefficient or the narrow-band superposition coefficient of the beam of the m-layer transmission layer is mapped to the broadband superposition coefficient or the narrow-band superposition coefficient of the beam in the transmission layer of the Km layer, and specifically includes:

Assigning an element corresponding to the strongest beam in the starting vector to an element corresponding to the strongest beam in the target vector; assigning an element other than the corresponding element of the strongest beam in the starting vector to the target vector The strongest beam corresponds to an element other than the element.
The channel state information receiving method or the receiving end device according to claim 17 or 18, further comprising:

Using a narrowband phase coefficient vector of a first polarization direction of the xth transmission layer in the m layer transmission layer as a starting vector; and a first pole of a yth transmission layer in the Km layer transmission layer a narrow-band phase coefficient vector of the direction as a target vector;

a narrowband phase coefficient vector of a second polarization direction of the xth transmission layer in the m layer transmission layer is used as a starting vector; and a second pole of the yth transmission layer in the Km layer transmission layer The narrow-band phase coefficient vector of the direction is used as the target vector.
The channel state information receiving method or the receiving end device according to claim 19, wherein the receiving end device refers to the mapping rule and beam reference information of a Km layer transport layer other than the m layer transport layer. The broadband superposition coefficient or the narrow-band superposition coefficient of the beam of the m-layer transmission layer is mapped to the broadband superposition coefficient or the narrow-band superposition coefficient of the beam in the transmission layer of the Km layer, and specifically includes:

And assigning the fth element of the first polarization direction of the narrowband phase coefficient vector in the start vector to the fth element of the first polarization direction of the narrowband phase coefficient vector in the target vector; After the fth element of the second polarization direction of the narrowband phase coefficient vector in the start vector is multiplied by -1, the fth of the second polarization direction assigned to the narrowband phase coefficient vector in the target vector Elements.