CN111277360B

CN111277360B - Transmission method, terminal and network equipment for CSI report

Info

Publication number: CN111277360B
Application number: CN201910028431.1A
Authority: CN
Inventors: 施源
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2023-02-21
Anticipated expiration: 2039-01-11
Also published as: CN111277360A

Abstract

The invention discloses a transmission method, a terminal and network equipment for CSI reports, wherein the method comprises the following steps: acquiring uplink channel resources; sending a Channel State Information (CSI) report on uplink channel resources; the CSI report comprises a first part and a second part, the load size of the second part is determined according to the first part, and the first part carries indication information indicating the load size of the second part. In this way, in the embodiment of the present invention, when the terminal reports the CSI report to the network device, the first part with the fixed load size carries the information indicating the load size of the second part, and after the network device receives the CSI report, according to the load size of the second part indicated by the first part and the actually received data size of the second part, it can be determined whether the terminal discards part of the content, which is beneficial for the network device to accurately know the channel state.

Description

Transmission method, terminal and network equipment for CSI report

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a transmission method, a terminal, and a network device for a CSI report.

Background

In a wireless communication system, feedback of Channel State Information (CSI) is enhanced, and the CSI feedback has two modes of a type I and a type II. Type two employs spatial orthogonal baseline combining (LC) to approximate CSI, such as eigenvalue vectors of channels. Specifically, L orthogonal beams are selected from oversampled two-dimensional Discrete Fourier Transform (2D DFT) beams, a combination coefficient (complex number) corresponding to each layer (or each eigenvalue vector) of the L orthogonal beams is calculated, and an amplitude value, a phase value, and/or a phase angle value thereof is quantized. Where L is configured for the network device, the selection of orthogonal beams is bandwidth based and applies to all ranks (rank), i.e. to all layers (layer). The amplitude quantization of the combined coefficients may be configured as bandwidth quantization or as bandwidth quantization and subband quantization, wherein bandwidth quantization is indicated when the subband amplitude (subband amplitude) is false (false) and bandwidth quantization and subband quantization is indicated when the subband amplitude is true (true). The phase angle quantization of the combined coefficients is done on each subband.

Further, CSI reports corresponding to CSI feedback type two may be written as a codebook written as a 2L × R matrix at frequency domain granularity m.

If all the combination coefficients at the granularity of the frequency domain are concatenated together, a precoding matrix of the layer r in the frequency domain can be obtained, and the precoding matrix can be written as a 2L × M matrix.

In order to reduce CSI feedback overhead, a 2 lxm matrix can be compressed into a 2 lxk compression matrix by methods such as frequency domain compression for frequency domain correlation, time domain compression for sparsity of time domain impulse response, and frequency domain difference.

Specifically, the CSI report includes a first part (part 1) and a second part (part 2), wherein part1 has a fixed load size, specifically including: rank Indication (RI), channel Quality Indication (CQI), and a number Indication of non-zero amplitude combining coefficients for each layer of bandwidth. part2 includes a Precoding Matrix Indicator (PMI). In the CSI report, part1 and part2 are respectively encoded, and the load size of part2 is determined according to the compression matrix and the compression mode, and is uncertain.

However, when the CSI report is transmitted on a Physical Uplink Shared Channel (PUSCH), since the network device cannot predict the size of the CSI report, especially the load size of part2 in the CSI report, the PUSCH resource allocated by the network device may not accommodate all contents of the CSI report, and at this time, the terminal may discard part of the CSI content of part2 according to the preset priority rule. Since the precoding matrix indicated by the precoding matrix indication in the patr2 is compressed in the frequency domain or the time domain, the load size of the part2 may not be determined only according to the RI and the CQI carried in the part1 and the number indication of the nonzero amplitude combination coefficient of each layer of bandwidth, and then the network device may not determine whether the terminal discards the CSI part content of the part2 after receiving the CSI report, so that the network device may not accurately determine the channel condition according to the CSI report.

Disclosure of Invention

The embodiment of the invention provides a transmission method of a Channel State Information (CSI) report, a terminal and network equipment, and aims to solve the problem that the network equipment cannot accurately judge the channel condition because whether the terminal discards part of the CSI content of part2 cannot be determined.

In a first aspect, an embodiment of the present invention provides a method for transmitting a CSI report, which is applied to a terminal side, and includes:

acquiring uplink channel resources;

sending a Channel State Information (CSI) report on uplink channel resources; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined from the first portion; the first portion includes at least one of the following information:

first indication information indicating a size of a precoding matrix subband;

second indication information indicating the number of orthogonal bases,

third indication information indicating a selection manner of the orthogonal base,

fourth indication information indicating the number of coefficients in the subset of the matrix of coefficients,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type.

In a second aspect, an embodiment of the present invention further provides a terminal, including:

an obtaining module, configured to obtain uplink channel resources;

a sending module, configured to send a CSI report on an uplink channel resource; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined from the first portion; the first portion includes at least one of the following information:

first indication information indicating a size of a precoding matrix subband;

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type.

In a third aspect, an embodiment of the present invention provides a terminal, where the terminal includes a processor, a memory, and a computer program stored in the memory and running on the processor, and when the computer program is executed by the processor, the steps of the method for transmitting a CSI report are implemented.

In a fourth aspect, an embodiment of the present invention provides a method for transmitting a CSI report, where the method is applied to a network device side, and the method includes:

configuring uplink channel resources for the terminal;

receiving a Channel State Information (CSI) report on uplink channel resources; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined from the first portion; the first portion includes at least one of the following information:

first indication information indicating a size of a precoding matrix subband;

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type.

In a fifth aspect, an embodiment of the present invention provides a network device, including:

the configuration module is used for configuring uplink channel resources for the terminal;

a receiving module, configured to receive a CSI report on an uplink channel resource; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined from the first portion; the first portion includes at least one of the following information:

first indication information indicating a size of a precoding matrix subband;

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type.

In a sixth aspect, an embodiment of the present invention further provides a network device, where the network device includes a processor, a memory, and a computer program stored in the memory and running on the processor, and the processor, when executing the computer program, implements the steps of the transmission method for CSI report.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for transmitting a CSI report are implemented.

Therefore, when the terminal reports the CSI report to the network device, the first part with the fixed load size carries the information indicating the size of the second part of the load, and after the network device receives the CSI report, according to the size of the second part of the load indicated by the first part and the actually received data volume of the second part, whether the terminal discards part of the content can be determined, which is beneficial for the network device to accurately know the channel state.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 shows a block diagram of a mobile communication system to which an embodiment of the present invention is applicable;

fig. 2 is a flowchart illustrating a method for transmitting a CSI report of a terminal according to an embodiment of the present invention;

fig. 3 is a schematic block diagram of a terminal according to an embodiment of the present invention;

FIG. 4 shows a block diagram of a terminal of an embodiment of the invention;

fig. 5 is a schematic diagram of a bang of a transmission method for CSI reports of a network device according to an embodiment of the present invention;

FIG. 6 is a block diagram of a network device according to an embodiment of the present invention;

fig. 7 shows a block diagram of a network device of an embodiment of the invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a terminal Device or a User Equipment (UE), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a Base Station or a core network, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), where the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that the Base Station in the NR system is only taken as an example in the embodiment of the present invention, but the specific type of the Base Station is not limited.

The base stations may communicate with the terminals 11 under the control of a base station controller, which may be part of the core network or some of the base stations in various examples. Some base stations may communicate control information or user data with the core network through a backhaul. In some examples, some of the base stations may communicate with each other, directly or indirectly, over backhaul links, which may be wired or wireless communication links. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, and so on.

The base station may communicate wirelessly with the terminal 11 via one or more access point antennas. Each base station may provide communication coverage for a respective coverage area. The coverage area of an access point may be divided into sectors that form only a portion of the coverage area. A wireless communication system may include different types of base stations (e.g., macro, micro, or pico base stations). The base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations (including coverage areas of base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.

The communication links in a wireless communication system may comprise an Uplink for carrying Uplink (UL) transmissions (e.g., from terminal 11 to network device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from network device 12 to terminal 11). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission.

An embodiment of the present invention provides a transmission method for CSI reports, which is applied to a terminal side, and as shown in fig. 2, the method includes the following steps:

step 21: and acquiring uplink channel resources.

The Uplink Channel resource includes, but is not limited to, a Physical Uplink Control Channel (PUCCH) and/or a Physical Uplink Shared Channel (PUSCH). Optionally, the uplink Channel Resource may be configured to the terminal semi-statically through Radio Resource Control (RRC) signaling by the network device, or may be dynamically indicated to the terminal through a Physical Downlink Control Channel (PDCCH).

Step 22: sending a Channel State Information (CSI) report on uplink channel resources; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined according to the first portion.

Wherein the first Part (Part 1) has a fixed payload size and carries information indicating the payload size of the second Part (Part 2), optionally the first Part comprises at least one of the following information:

the first indication information indicating the precoding matrix indication subband size is, for example, precoding matrix PMI subband size indication (PMI subband size indication). The wideband frequency domain granularity may be a subband or an RB, and the subband is taken as an example in this embodiment, but those skilled in the art can understand that the first indication information may also be first indication information indicating the number of RBs included in the frequency domain granularity corresponding to the precoding matrix.

Second indication information indicating the number of orthogonal bases, the second indication information specifically indicating: the number of DFT bases that can be selected after the codebook is compressed in the frequency domain. The orthogonal basis may include, but is not limited to, a DFT orthogonal basis and/or an IDFT orthogonal basis, among others.

Third indication information indicating a selection mode (or referred to as a selection scheme) of the orthogonal base, wherein the selection scheme of the orthogonal base includes independent selection or common selection, and the selectable combination modes include, but are not limited to, the following four modes:

selecting a first mode, selecting level independent selection and selecting beam level independent selection (Layer level independent with beam level independent);

selecting a second mode, namely, selecting independently in a hierarchy mode and selecting jointly in a beam level mode (Layer level index with beam level common);

a third selection mode is that the beam level common selection and the beam level independent selection are carried out in a hierarchy common selection mode (Layer level common with beam level index);

and the selection mode is four, the layers are selected together, and the beams are selected together (Layer level common with beam level common).

The selection mode of the orthogonal base of the terminal influences the selection of the initial vector matrix of the orthogonal base. That is, the selection and determination of the initial vector matrix of orthogonal bases is related to the manner in which the orthogonal bases are selected. For example, the selection and determination of the initial vector matrix of the DFT orthogonal basis are related to the selection mode of the DFT orthogonal basis; the selection and determination of the initial vector matrix of the IDFT orthogonal basis is related to the manner in which the IDFT orthogonal basis is selected.

Fourth indication information indicating the number of coefficients in the subset of coefficient matrices, the subset of coefficient matrices being: a 2L × R subset constructed by selecting coefficients from a coefficient matrix. Wherein, the coefficient matrix refers to a combination coefficient matrix of orthogonal beam vectors of a certain layer on the granularity of a frequency domain.

And fifth indication information indicating the coefficient matrix subset bitmap, wherein the fifth indication information specifically indicates which coefficients are selected from the coefficient matrix as the subset. Optionally, the fifth indication information may be a 2-dimensional bitmap (bitmap) of a 2L × M-dimensional matrix, where L is the number of selected orthogonal beams, and a value of L may be configured by the network device, and M is a frequency domain number into which a frequency domain wideband is divisible by using a frequency domain granularity as a unit.

The terminal determines the value of the oversampling coefficient, and the terminal may carry the oversampling coefficient information in the first part when the terminal needs to autonomously determine the value of the oversampling coefficient.

And sixth indication information indicating a quantization type (or called a quantization scheme), wherein the quantization type includes but is not limited to: wideband quantization and subband quantization.

It should be noted that the first part in the CSI report may only include one of the above information items, or may include different combinations of the above information items, for example, a combination including any two of the above information items, a combination including any three of the above information items, a combination including any four of the above information items, and the like. In addition, the CSI report may further include other information besides the above information, for example, rank indication RI, channel quality indication CQI information, or other information that may be used to indicate the size of the second fractional payload.

Optionally, the information carried in the second part, or the payload size of the second part, is related to a coefficient matrix of the terminal, a selected orthogonal base, and the like, and in order to accurately indicate the payload size of the second part, the terminal may determine the information carried in the first part according to the coefficient matrix, the selected orthogonal base, and the like, for example:

the first part further comprises: and the first part carries first indication information under the condition that the size of the sub-band of the precoding matrix is not consistent with the size of the sub-band indicated by the CQI information. That is, the first indication information is carried in Part1 only when the precoding matrix subband size is not consistent with the CQI subband size.

Or, in a case that the network device is configured with at least two pieces of precoding matrix indicator subband information (i.e., PMI subband information), the first part carries the first indicator information. That is to say, only when the network device configures multiple pieces of PMI subband information to the terminal, the first indication information is carried in Part 1.

And under the condition that the number of the orthogonal bases is not consistent with the number of the orthogonal bases configured by the network equipment or the network equipment is configured with at least two orthogonal bases, the first part carries second indication information. The second indication information is carried in Part1 only when the number of orthogonal bases that can be selected after the frequency domain compression of the codebook is inconsistent with the number of orthogonal bases indicated by the network equipment, or when the network equipment configures the selection number indication information of a plurality of orthogonal bases.

The third indication information can be realized by adopting a bit indication mode, the third indication information comprises at least one indication bit, and the selection modes of orthogonal bases indicated by different values of the indication bit are different. Wherein the number of the indication bits is related to the number of selection modes of the orthogonal base, and assuming that the number of selection modes of the orthogonal base is N, the number of the indication bits may be ceil (log) ₂ N). E.g., four, orthogonal bases, then the terminal may use 2 bits for indication. Or, there are two selection modes of the orthogonal bases, and the third indication information may be indicated by 1 bit. In addition, in addition to using the third indication information to indicate the selection manner of the orthogonal base, a default scheme may be used to indicate, for example, the protocol specifies the selection manner of the default orthogonal base.

Under the condition that the terminal autonomously determines the oversampling coefficient of the orthogonal base, the first part carries the oversampling coefficient information of the orthogonal base. That is to say, when the protocol agrees on the oversampling coefficient of the orthogonal base, or when the network device indicates the oversampling coefficient of the orthogonal base, or when the terminal negotiates with the network device to determine the oversampling coefficient of the orthogonal base, the first part may not carry the oversampling coefficient information of the orthogonal base.

In case there are at least two candidate quantization types, the first part carries sixth indication information. That is, the sixth indication information is carried in Part1 only when the terminal needs to select one quantization type from a plurality of candidate quantization types.

Further, step 22 comprises: under the condition that uplink channel resources are smaller than transmission resources required by the CSI report, discarding at least part of information of a second part in the CSI report according to a preset priority; and sending the discarded CSI report on the uplink channel resources. Because the network device cannot know the load size of Part2 in the CSI report in advance, the uplink channel resource scheduled by the network device for the terminal may not be enough to transmit all contents of the CSI report, and in this case, the terminal needs to discard Part of the contents in Part2 according to the preset priority.

Optionally, the second portion comprises: wideband CSI information, a compressed matrix of CSI, and seventh indication information indicating a vector matrix of orthogonal bases.

The wideband CSI information, or wideband information, includes information common to the subbands, such as a non-zero wideband amplitude position indication, and may further include but is not limited to: the index of the orthogonal beam group where the selected orthogonal beam is located, the index of the selected orthogonal beam in the orthogonal beam group, the orthogonal beam index corresponding to the strongest combination coefficient of each layer, the amplitude quantization value of the wideband combination coefficient of each layer, and the like. Optionally, the bandwidth CSI information may be a 2D DFT matrix formed by any combination of the above information, or referred to as a W1 matrix, and optionally, the bandwidth CSI information may be represented in a bitmap form of the W1 matrix.

The compression matrix of the CSI refers to a matrix formed by compressing a precoding matrix in a time domain or a frequency domain, wherein the precoding matrix is a layer on a broadbandThe precoding matrix (or called frequency domain), specifically the concatenation of the combined coefficient matrix of orthogonal beam vectors on all frequency domain granularities of a certain layer, can be written as a 2L × M matrix (W) _2,r ) _2L×M 。

The coefficient matrix refers to a combined coefficient matrix of orthogonal beam vectors of a certain layer on the granularity of a frequency domain, and the coefficient matrix is a 2L multiplied by R matrix and is expressed as follows:

wherein R is a rank number; b' _l For orthogonal vectors consisting of 2D-DFT beam vectors, c _l,r (m) is the combining coefficient of the l-th orthogonal beam vector of layer R at frequency domain granularity m, R =1,2, \ 8230, R, l =1,2, \ 8230, and 2l, l is the number of orthogonal beams selected. The frequency domain granularity may be a sub-band or a Resource Block (RB), and the wideband may be divided into M frequency domain resources by using the frequency domain granularity as a unit.

The precoding matrix is a precoding matrix of a certain layer on a wideband (or called frequency domain), that is, combining coefficients on all frequency domain granularities are concatenated together to obtain a precoding matrix of the layer r on the frequency domain, and the precoding matrix can be written as a 2L × M matrix, and is expressed as follows:

wherein, c _l,r (m) is the combining coefficient of the l-th orthogonal beam vector of layer r at frequency domain granularity m. W _2,r The l line in (b) represents a beam vector b' _l Combining coefficients at all frequency domain granularities.

The compression matrix is: and extracting elements from the product of the precoding matrix and the initial vector matrix of the orthogonal basis to form a 2L multiplied by K matrix, wherein K is a value less than M, and can be configured by the network equipment, agreed by the protocol or determined by the terminal. E.g., spatial compression using CSI feedback type twoW _2,r Carry out transformation W ₃ I.e. by

From W ₃ Is orthogonal to

Suppose W ₃ Determining an Inverse Discrete Fourier Transform (IDFT) matrix of dimension M × M corresponds to transforming the combined coefficients of the frequency domain into the time domain, i.e. for W _2,r And (3) carrying out transformation:

if the frequency domain coefficients after the spatial compression have sparseness in the time domain, only a small number of time domain coefficients with larger amplitude can be fed back, and other time domain coefficients are zero. Assuming that only the K time domain coefficients with the maximum amplitude after IDFT are fed back, the method is characterized in that

Extracting K rows to obtain

Due to the fact that

Each column has an element of 1, feedback is not needed, the number of complex numbers needing feedback in each layer is reduced from (2L-1) M to (2L-1) K, and the serial numbers of the selected K nonzero coefficients are fed back, so that time domain compression is realized, wherein

The selected orthogonal basis vector matrix corresponding to the corresponding position is

Or, assume that

Including the selected K optimal orthogonal vectors, where K<M, then W can be approximately recovered _2,r . For example

Including K orthogonal DFT vectors selected, or K right principal Singular vectors decomposed by Singular Value Decomposition (SVD), etc. To W _2,r Transforming to obtain:

therefore, the content to be fed back is composed of W of 2L × M dimensions _2,r Into 2L by K dimensions

And the number of the selected K orthogonal vectors. Due to the fact that

Each column of the data compression unit is subjected to normalization operation, one element of each column is 1, feedback is not needed, and therefore the number of complex numbers needing feedback in each layer is reduced from (2L-1) M to (2L-1) K, and frequency domain compression is achieved.

Accordingly, the seventh indication information may indicate an initial vector matrix of the orthogonal base, for example, an IDFT matrix (W) in which the initial vector of the orthogonal base is M × M ₃ ) _M×M . Alternatively, the seventh indication information may be indicated by extracting an index value where an element is located in the initial vector matrix of the orthogonal base.

Optionally, in the embodiment of the present invention, the number of preset priorities N = X + RI, where RI is the number of layers, that is, the number of compression matrices, X = a × b is the number of the seventh indication information, and values of a and b are related to a selection manner of the orthogonal base. For example, for the first selection mode, a = RI, b =2L; for the second selection mode, a = RI, b =1; for option three above, a =1,b =2l; for the selection mode four above, a =1,b =1. Where RI represents the number of layers, 2L represents the number of rows of the compression matrix, and L is the number of selected orthogonal vectors. Further, the reporting order of the X seventh indication information in the CSI report is b first and a second, and is arranged from the small arrival according to the index (index) of b and a.

In the embodiment of the invention, the preset priority meets one of the following rules:

rule one, the wideband CSI information has the highest priority, and the compression matrix has a higher priority than the seventh indication information.

Wherein the compression matrix has a higher priority than the seventh indication information, and the compression matrix comprises one of:

in case one, the Priority (Priority) of the compression matrix on all layers is higher than that of the seventh indication information on any layer, and the preset Priority is shown in table 1 below:

TABLE 1

In case two, the priority of the compression matrix on each layer is higher than the priority of the seventh indication information on the respective layer, and if the RI is 2, the preset priority is as shown in table 2:

TABLE 2

When uplink channel resources are not enough to transmit all CSI reports, discarding each CSI report from low Priority to high Priority, as shown in the above tables 1 and 2, discarding the CSI reports in the order from Priority N to Priority 1. That is, when the uplink channel resource is smaller than the load size of the CSI report, the terminal determines the content of the CSI report to be transmitted according to the rule that the priority is from high to low according to the size of the uplink channel resource.

Rule two, the priority of the wideband CSI information is the highest, and the priority of the seventh indication information is higher than the priority of the compression matrix.

Wherein the seventh indication information has a higher priority than the compression matrix comprises one of:

in case three, the priority of the seventh indication information matrix on all layers is higher than that of the compression matrix on any layer, and the preset priority is shown in table 3:

TABLE 3

In case four, the priority of the seventh indication information matrix on each layer is higher than that of the compression matrix on the respective layer, taking RI =2 as an example, the preset priority is shown in table 4:

TABLE 4

When uplink channel resources are not enough to transmit all CSI reports, discarding each CSI report from low to high according to Priority, as shown in the above tables 1 and 2, discarding is performed according to the order from Priority N to Priority 1. That is, when the uplink channel resource is smaller than the load size of the CSI report, the terminal determines the content of the CSI report to be transmitted according to the rule that the priority is from high to low according to the size of the uplink channel resource.

In the method for transmitting the CSI report of the embodiment of the present invention, when the terminal reports the CSI report to the network device, the information indicating the size of the second part of the load is carried in the first part with the fixed load size, so that after the network device receives the CSI report, according to the size of the second part of the load indicated by the first part and the actually received data size of the second part, it can be determined whether the terminal discards part of the content, which is beneficial for the network device to accurately know the channel state.

The foregoing embodiments describe methods for transmitting CSI reports in different scenarios, and further describe terminals corresponding to the methods with reference to the accompanying drawings.

As shown in fig. 3, the terminal 300 according to the embodiment of the present invention can obtain uplink channel resources in the foregoing embodiment; and sending details of a Channel State Information (CSI) report method on uplink channel resources, and achieving the same effect, wherein the CSI report comprises a first part and a second part, the load size of the second part is determined according to the first part, and the first part carries indication information indicating the load size of the second part. The terminal 300 specifically includes the following functional modules:

an obtaining module 310, configured to obtain uplink channel resources;

a sending module 320, configured to send a CSI report on an uplink channel resource; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined from the first portion; the first portion includes at least one of the following information:

first indication information indicating a size of a precoding matrix subband;

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type.

Wherein the first part further comprises: and the first part carries first indication information under the condition that the size of the precoding matrix sub-band is not consistent with the size of the sub-band indicated by the CQI information.

Optionally, the first part carries the first indication information when the network device is configured with at least two precoding matrix indication subband information.

And when the number of the orthogonal bases is not consistent with the number of the orthogonal bases configured by the network equipment or the network equipment is configured with at least two orthogonal bases, the first part carries second indication information.

The third indication information comprises at least one indication bit, and different values of the indication bit indicate different selection modes of orthogonal bases.

And the first part carries the over-sampling coefficient information of the orthogonal base under the condition that the terminal autonomously determines the over-sampling coefficient of the orthogonal base.

And when at least two candidate quantization types exist, the first part carries sixth indication information.

Wherein, the sending module 320 includes:

the discarding submodule is used for discarding at least part of information of the second part in the CSI report according to the preset priority under the condition that the uplink channel resource is less than the transmission resource required by the CSI report;

and the sending submodule is used for sending the discarded CSI report on the uplink channel resources.

Wherein the second portion comprises: wideband CSI information, a compressed matrix of CSI, and seventh indication information indicating a vector matrix of orthogonal bases.

Wherein the preset priority satisfies one of the following rules:

the priority of the wideband CSI information is the highest, and the priority of the compression matrix is higher than that of the seventh indication information;

the wideband CSI information has the highest priority, and the seventh indication information has a higher priority than the compression matrix.

the priority of the compression matrix on all layers is higher than that of the seventh indication information on any layer;

the compression matrix at each layer has a higher priority than the seventh indication information at the respective layer.

the priority of the seventh indication information matrix on all layers is higher than that of the compression matrix on any layer;

the seventh indication information matrix on each layer has a higher priority than the compression matrix on the respective layer.

In the embodiment of the present invention, the number N = X + RI of the preset priorities is set, where RI is the number of layers, and X = a × b, and the values of a and b are related to the selection manner of the orthogonal base.

It is worth pointing out that, when the terminal reports the CSI report to the network device, the first part with the fixed load size carries the information indicating the size of the second part of the load, so that after the network device receives the CSI report, according to the size of the second part of the load indicated by the first part and the actually received data volume of the second part, it can be determined whether the terminal discards part of the content, which is beneficial for the network device to accurately know the channel state.

To better achieve the above object, further, fig. 4 is a schematic diagram of a hardware structure of a terminal implementing various embodiments of the present invention, where the terminal 40 includes, but is not limited to: radio frequency unit 41, network module 42, audio output unit 43, input unit 44, sensor 45, display unit 46, user input unit 47, interface unit 48, memory 49, processor 410, and power supply 411. Those skilled in the art will appreciate that the terminal structure shown in fig. 4 is not intended to be limiting of the terminal, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 41 is configured to obtain an uplink channel resource; sending a Channel State Information (CSI) report on uplink channel resources; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined from the first portion; the first portion includes at least one of the following information:

first indication information indicating a size of a precoding matrix subband;

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type.

And a processor 410 for controlling the rf unit 41 to transmit and receive data.

When the terminal reports the CSI report to the network equipment, the first part with the fixed load size carries the information indicating the load size of the second part, so that after the network equipment receives the CSI report, according to the load size of the second part indicated by the first part and the actually received data volume of the second part, whether the terminal discards part of the content can be determined, and the network equipment can accurately know the channel state conveniently.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 41 may be used for receiving and sending signals during a message transmission or call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 410; in addition, the uplink data is transmitted to the base station. In general, the radio frequency unit 41 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 41 can also communicate with a network and other devices through a wireless communication system.

The terminal provides the user with wireless broadband internet access via the network module 42, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 43 may convert audio data received by the radio frequency unit 41 or the network module 42 or stored in the memory 49 into an audio signal and output as sound. Also, the audio output unit 43 may also provide audio output related to a specific function performed by the terminal 40 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 43 includes a speaker, a buzzer, a receiver, and the like.

The input unit 44 is for receiving an audio or video signal. The input Unit 44 may include a Graphics Processing Unit (GPU) 441 and a microphone 442, and the Graphics processor 441 processes image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 46. The image frames processed by the graphic processor 441 may be stored in the memory 49 (or other storage medium) or transmitted via the radio frequency unit 41 or the network module 42. The microphone 442 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 41 in case of the phone call mode.

The terminal 40 also includes at least one sensor 45, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 461 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 461 and/or the backlight when the terminal 40 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 45 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 46 is used to display information input by the user or information provided to the user. The Display unit 46 may include a Display panel 461, and the Display panel 461 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 47 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 47 includes a touch panel 471 and other input devices 472. The touch panel 471, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 471 (e.g., operations by a user on or near the touch panel 471 using a finger, a stylus, or any other suitable object or attachment). The touch panel 471 can include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 410, receives a command from the processor 410, and executes the command. In addition, the touch panel 471 can be implemented by various types, such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 47 may include other input devices 472 in addition to the touch panel 471. Specifically, the other input devices 472 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 471 can be overlaid on the display panel 461, and when the touch panel 471 detects a touch operation on or near the touch panel 471, the touch panel transmits the touch operation to the processor 410 to determine the type of the touch event, and then the processor 410 provides a corresponding visual output on the display panel 461 according to the type of the touch event. Although in fig. 4, the touch panel 471 and the display panel 461 are implemented as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 471 and the display panel 461 may be integrated to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 48 is an interface for connecting an external device to the terminal 40. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 48 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 40 or may be used to transmit data between the terminal 40 and an external device.

The memory 49 may be used to store software programs as well as various data. The memory 49 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 49 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 410 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 49 and calling data stored in the memory 49, thereby performing overall monitoring of the terminal. Processor 410 may include one or more processing units; preferably, the processor 410 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.

The terminal 40 may further include a power supply 411 (e.g., a battery) for supplying power to various components, and preferably, the power supply 411 may be logically connected to the processor 410 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the terminal 40 includes some functional modules that are not shown, and are not described in detail herein.

Preferably, an embodiment of the present invention further provides a terminal, including a processor 410, a memory 49, and a computer program stored in the memory 49 and capable of running on the processor 410, where the computer program is executed by the processor 410 to implement each process of the above transmission method for CSI report, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. A terminal may be a wireless terminal or a wired terminal, and a wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. Examples of the Wireless Communication devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Device or User Equipment (User Equipment), which are not limited herein.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the foregoing transmission method for a CSI report, and can achieve the same technical effect, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

The above embodiment describes the transmission method of the CSI report of the present invention from the terminal side, and the following embodiment further describes the transmission method of the CSI report of the network device side with reference to the accompanying drawings.

The transmission method of the CSI report of the embodiment of the present invention is applied to a network device side, and as shown in fig. 5, the method includes the following steps:

step 51: and configuring uplink channel resources for the terminal.

The uplink channel resource includes, but is not limited to, PUCCH and/or PUSCH. Optionally, the uplink channel resource may be configured to the terminal semi-statically by the network device through RRC signaling, or may be dynamically indicated to the terminal through a physical downlink control channel PDCCH.

Step 52: receiving a Channel State Information (CSI) report on uplink channel resources; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined according to the first portion.

Wherein the first Part (Part 1) has a fixed payload size and carries information indicating the payload size of the second Part (Part 2), optionally the first Part comprises at least one of the following information: first indication information indicating a size of a precoding matrix subband; for example, the first indication information is a precoding matrix PMI subband size indication.

Second indication information indicating the number of orthogonal bases, the second indication information specifically indicating: the codebook is frequency domain compressed and the number of orthogonal bases can be selected.

And third indication information indicating a selection manner of the orthogonal bases, wherein the selection scheme of the orthogonal bases includes independent selection or collective selection, and the selectable combination manner includes, but is not limited to, the four manners exemplified in the terminal side embodiment.

Fourth indication information indicating the number of coefficients in the subset of coefficient matrices, wherein the subset of coefficient matrices is: a 2L x M subset of coefficients is constructed by picking the coefficients from the coefficient matrix. Wherein, the coefficient matrix refers to a combination coefficient matrix of orthogonal beam vectors of a certain layer on the granularity of a frequency domain.

And optionally, the fifth indication information may be a 2-dimensional bitmap of a 2l × M-dimensional matrix, where L is the number of selected orthogonal beams, and a value of L may be configured by the network device, and M is the number of frequency domains into which frequency domain bandwidths can be divided in units of frequency domain granularity.

And sixth indication information indicating a quantization type, wherein the quantization type includes, but is not limited to: wideband quantization and subband quantization.

It should be noted that the first part of the CSI report may only include one of the above information, or may include different combinations of the above information. In addition, the CSI report may further include other information besides the above information, for example, rank indication RI, channel quality indication CQI information, or other information that may be used to indicate the size of the second fractional payload.

In the embodiment of the present invention, after step 52, the method further includes: determining a payload size of a second portion from the first portion in a CSI report; in a case that a payload of the second portion is less than the determined payload size, it is determined that at least part of information of the second portion in the CSI report is discarded. Thus, after receiving the first part, the network device can determine the size of the load of the second part that the terminal actually needs to transmit, and if the determined load is greater than the actually received load of the second part, it indicates that a part of the content of the second part is lost, and the network device can configure a new uplink channel resource for the terminal to report the CSI, and the like.

In the transmission method of the CSI report of the channel state information according to the embodiments of the present invention, after receiving the CSI report, the network device determines the size of the second part load according to the information indicating the size of the second part load carried in the first part with the fixed load size, and then determines whether the terminal discards part of the content according to the actually received data size of the second part, which is beneficial for the network device to accurately know the channel state.

The foregoing embodiments respectively describe in detail the transmission methods of CSI reports in different scenarios, and the following embodiments further describe corresponding network devices with reference to the accompanying drawings.

As shown in fig. 6, the network device 600 according to the embodiment of the present invention can configure uplink channel resources for the terminal in the foregoing embodiment; on the uplink channel resource, receiving details of a Channel State Information (CSI) reporting method, and achieving the same effect, wherein the CSI report comprises a first part and a second part, and the load size of the second part is determined according to the first part. The network device 600 specifically includes the following functional modules:

a configuration module 610, configured to configure uplink channel resources for a terminal;

a receiving module 620, configured to receive a CSI report on an uplink channel resource; wherein the CSI report comprises a first part and a second part, and the load size of the second part is determined according to the first part; the first portion includes at least one of the following information:

first indication information indicating a size of a precoding matrix subband;

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type.

Wherein, the network device 600 further comprises:

a first determining module, configured to determine a payload size of a second part according to a first part in a CSI report;

a second determining module for determining that at least part of the information of the second part in the CSI report is discarded, if the load of the second part is smaller than the determined load size.

It is worth pointing out that, after receiving the CSI report, the network device according to the embodiment of the present invention determines the size of the second part of the payload according to the information indicating the size of the second part of the payload carried in the first part of the fixed payload size, and then determines whether the terminal discards part of the content according to the actually received data amount of the second part, which is beneficial for the network device to accurately know the channel state.

It should be noted that the division of the modules of the network device and the terminal is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or can be implemented in the form of hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the determining module may be a processing element separately set up, or may be integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a processing element of the apparatus calls and executes the function of the determining module. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when some of the above modules are implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can invoke the program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

To better achieve the above object, embodiments of the present invention further provide a network device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps in the transmission method for CSI report as described above are implemented. An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the transmission method for CSI report as described above.

Specifically, the embodiment of the invention also provides a network device. As shown in fig. 7, the network device 700 includes: an antenna 71, a radio frequency device 72, a baseband device 73. The antenna 71 is connected to a radio frequency device 72. In the uplink direction, the rf device 72 receives information through the antenna 71 and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes information to be transmitted and transmits the information to the radio frequency device 72, and the radio frequency device 72 processes the received information and transmits the processed information through the antenna 71.

The above-mentioned band processing means may be located in the baseband means 73, and the method performed by the network device in the above embodiment may be implemented in the baseband means 73, where the baseband means 73 includes a processor 74 and a memory 75.

The baseband device 73 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 7, wherein one of the chips, for example, the processor 74, is connected to the memory 75 to call up the program in the memory 75 to perform the network device operation shown in the above method embodiment.

The baseband device 73 may further include a network interface 76, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 72.

The processor may be a single processor or a combination of multiple processing elements, for example, the processor may be a CPU, an ASIC, or one or more integrated circuits configured to implement the methods performed by the network devices, for example: one or more microprocessors DSP, or one or more field programmable gate arrays FPGA, or the like. The storage element may be a memory or a combination of a plurality of storage elements.

The memory 75 may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 75 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Specifically, the network device of the embodiment of the present invention further includes: a computer program stored on the memory 75 and executable on the processor 74, the processor 74 calling the computer program in the memory 75 to execute the method performed by each module shown in fig. 6.

In particular, the computer program when invoked by the processor 74 is operable to perform: configuring uplink channel resources for the terminal;

first indication information indicating a size of a precoding matrix subband;

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type.

After receiving the CSI report, the network device in the embodiment of the present invention determines the size of the second part of the payload according to the information indicating the size of the second part of the payload carried in the first part of the fixed payload size, and then determines whether the terminal discards part of the content according to the actually received data amount of the second part of the payload, which is beneficial for the network device to accurately know the channel state.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A transmission method of CSI report is applied to a terminal side, and is characterized by comprising the following steps:

acquiring uplink channel resources;

sending a Channel State Information (CSI) report on the uplink channel resource; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined from the first portion; the first portion includes at least one of the following information:

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type;

wherein a payload size of the second portion is related to at least one of the orthogonal basis, the coefficient matrix, and the quantization type.

2. The method of claim 1, wherein the first part carries the second indication information when the number of orthogonal bases is not the same as the number of orthogonal bases configured by a network device, or the network device is configured with at least two orthogonal bases.

3. The method of claim 1, wherein the third indication information comprises at least one indication bit.

4. The method for transmitting CSI reports according to claim 1, wherein the first part carries the oversampling coefficient information of the orthogonal base if the terminal autonomously determines the oversampling coefficient of the orthogonal base.

5. The method for transmitting CSI reports according to claim 1, wherein the first part carries the sixth indication information in case that there are at least two candidate quantization types.

6. The method for transmitting CSI reports according to claim 1, wherein the step of sending CSI reports on the uplink channel resources comprises:

under the condition that the uplink channel resources are smaller than the transmission resources required by the CSI report, discarding at least part of information of a second part in the CSI report according to a preset priority;

and sending the discarded CSI report on the uplink channel resource.

7. The method according to claim 6, wherein the number of the preset priorities N = X + RI, where RI is the number of layers, and X = a × b, and values of a and b are related to a selection manner of the orthogonal base.

8. The method for transmitting CSI reports according to claim 6, wherein said second part comprises: wideband CSI information, a compressed matrix of CSI, and seventh indication information indicating a vector matrix of orthogonal bases.

9. The method for transmitting CSI reports according to claim 8, wherein the predetermined priority satisfies one of the following rules:

the wideband CSI information has the highest priority, and the compression matrix has a priority higher than that of the seventh indication information;

the wideband CSI information has a highest priority, and the seventh indication information has a higher priority than the compression matrix.

10. The method for transmitting CSI reports according to claim 9, wherein the compression matrix has a higher priority than the seventh indication information, which comprises one of the following cases:

11. The method of claim 9, wherein the seventh indication information has a higher priority than the compression matrix, and wherein one of:

the seventh indication information matrix on all layers has a higher priority than the compression matrix on any layer;

the seventh indication information matrix at each layer has a higher priority than the compression matrix at the respective layer.

12. A terminal, comprising:

an obtaining module, configured to obtain an uplink channel resource;

a sending module, configured to send a CSI report on the uplink channel resource; wherein the CSI report comprises a first part and a second part, a load size of the second part is determined according to the first part; the first portion includes at least one of the following information:

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type;

13. The terminal according to claim 12, wherein the first part carries the second indication information when the number of orthogonal bases is not consistent with the number of orthogonal bases configured by the network device, or the network device is configured with at least two orthogonal bases.

14. The terminal of claim 12, wherein the third indication information comprises at least one indication bit.

15. The terminal of claim 12, wherein the first part carries information of the over-sampled coefficients of the orthogonal basis in case that the terminal autonomously determines the over-sampled coefficients of DFT basis.

16. The terminal of claim 12, wherein the first portion carries the sixth indication information in a case that there are at least two candidate quantization types.

17. The terminal of claim 12, wherein the sending module comprises:

a discarding submodule, configured to discard at least part of information of a second part in the CSI report according to a preset priority when the uplink channel resource is smaller than a transmission resource required by the CSI report;

18. The terminal of claim 17, wherein the number of the preset priorities N = X + RI, where RI is the number of layers, and wherein X = a × b, and wherein values of a and b are related to a selection manner of the orthogonal base.

19. The terminal of claim 17, wherein the second portion comprises: wideband CSI information, a compressed matrix of CSI, and seventh indication information indicating a vector matrix of orthogonal bases.

20. The terminal of claim 19, wherein the predetermined priority satisfies one of the following rules:

21. A terminal, characterized in that the terminal comprises a processor, a memory and a computer program stored on the memory and run on the processor, which computer program, when executed by the processor, implements the steps of the method for transmission of channel state information, CSI, reports according to any of claims 1 to 11.

22. A transmission method of a Channel State Information (CSI) report is applied to a network device side, and is characterized by comprising the following steps:

configuring uplink channel resources for the terminal;

receiving a Channel State Information (CSI) report on the uplink channel resource; wherein the CSI report comprises a first part and a second part, a load size of the second part is determined according to the first part; the first portion includes at least one of the following information:

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type;

23. The method for transmitting CSI reports according to claim 22, further comprising, after the step of receiving CSI reports on said uplink channel resources:

determining a payload size of the second portion from the first portion in the CSI report;

determining that at least part of the information of the second part in the CSI report is discarded, in case the payload of the second part is smaller than the determined payload size.

24. A network device, comprising:

a configuration module, configured to configure uplink channel resources for a terminal;

a receiving module, configured to receive a CSI report on the uplink channel resource; wherein the CSI report includes a first portion and a second portion, a payload size of the second portion being determined from the first portion; the first portion includes at least one of the following information:

second indication information indicating the number of orthogonal bases,

fifth indication information indicating a coefficient matrix subset bitmap,

oversampling coefficient information of orthogonal basis, and

sixth indication information indicating a quantization type;

wherein a load size of the second portion is related to at least one of the orthogonal base, the coefficient matrix, and the quantization type.

25. The network device of claim 24, wherein the network device further comprises:

a first determining module for determining a payload size of the second portion according to the first portion in the CSI report;

a second determining module for determining that at least part of information of a second part in the CSI report is discarded, in case a payload of the second part is smaller than the determined payload size.

26. A network device, characterized in that the network device comprises a processor, a memory and a computer program stored on the memory and run on the processor, the processor implementing the steps of the method for transmission of channel state information, CSI, report according to claim 22 or 23 when executing the computer program.

27. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for transmission of a channel state information, CSI, report according to any of claims 1 to 11, 22 to 23.