CN111132216B

CN111132216B - Information reporting method, terminal and network equipment

Info

Publication number: CN111132216B
Application number: CN201811290407.7A
Authority: CN
Inventors: 宋扬; 孙鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2023-03-24
Anticipated expiration: 2038-10-31
Also published as: CN111132216A

Abstract

The invention provides an information reporting method, a terminal and network equipment, wherein the information reporting method comprises the following steps: sending a CSI report to the network equipment; the CSI report comprises CSI difference information of at least one first subband; the CSI difference information of the first subband is any one of: the difference value of the CSI information of the first sub-band and the CSI information of the reference sub-band and the difference value of the CSI information of the first sub-band and the CSI reconstruction information; the reference subband is a subband adjacent to the first subband or a subband for feeding back CSI (channel state information); the CSI reconstruction information is CSI interpolation information or CSI decompression information; the CSI interpolation information is the CSI information of a first sub-band after interpolation, which is obtained by performing interpolation calculation according to the CSI information of a plurality of sub-bands. The embodiment of the invention can further compress the CSI report by utilizing the CSI frequency domain correlation, thereby reducing the feedback overhead of the CSI report.

Description

Information reporting method, terminal and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an information reporting method, a terminal, and a network device.

Background

The NR Rel-15 enhances the feedback of Channel State Information (CSI), and the CSI feedback can be in a Type I mode and a Type II mode. Type II CSI feedback is a further enhancement on the basis of the CSI feedback introduced by Rel-14, and spatial orthogonal baseline combining (LC) may be employed to approximate the CSI (e.g., eigenvalue vector of the channel), thereby enabling CSI compression in the spatial domain. Type II CSI includes wideband information and subband information: the choice of L orthogonal bases (orthogonal beams) is broadband and applies to all ranks (rank), i.e. layers (layer); the amplitude quantization of the combining coefficients corresponding to the L orthogonal beams in each layer may be configured to be only wideband quantization or wideband quantization and subband quantization, and the phase angle quantization of the combining coefficients is performed on each subband.

Type II CSI reports can be divided into two parts, part 1 and Part 2: part 1 has a fixed load size under a parameter configuration (such as the number of CSI-RS ports, the number of orthogonal beams L, and the like), and includes Rank Indication (RI), channel Quality Indication (CQI), and a number Indication of nonzero amplitude coefficients of each layer of wideband; part 2 includes a Precoding Matrix Indicator (PMI). Part 1 and Part 2 are respectively coded, and the load size of Part 2 can be determined by the information of Part 1.

When a Type II CSI report is transmitted on a Physical Uplink Shared Channel (PUSCH), since a network device such as a base station cannot know CSI feedback in advance, especially the load size of Part 2 thereof, an allocated PUSCH resource may not accommodate the complete CSI report content, and thus Rel-15 specifies that a terminal may discard Part of the content of Part 2 without feedback.

However, although the current Type II CSI report can be compressed in the spatial domain, the feedback overhead is still large.

Disclosure of Invention

The embodiment of the invention provides an information reporting method, a terminal and network equipment, which aim to solve the problem of high feedback overhead of the existing CSI report.

In a first aspect, an embodiment of the present invention provides an information reporting method, applied to a terminal, including:

sending a CSI report to the network equipment;

wherein the CSI report comprises CSI difference information of at least one first subband; the CSI difference information of the first subband is any one of:

the difference value of the CSI information of the first sub-band and the CSI information of the reference sub-band and the difference value of the CSI information of the first sub-band and the CSI reconstruction information;

the reference subband is a subband adjacent to the first subband or a subband for feeding back CSI information.

In a second aspect, an embodiment of the present invention provides an information reporting method, applied to a terminal, including:

sending a CSI report to the network equipment;

the CSI report comprises CSI information of at least one second subband, the second subband exists in a subband group form, and each subband group comprises one second subband.

In a third aspect, an embodiment of the present invention provides an information reporting method, applied to a terminal, including:

sending a CSI report to the network device;

all layers of the CSI information of the terminal select the same orthogonal beam group, each layer independently selects orthogonal beams in the orthogonal beam group, and the CSI report comprises index information of the orthogonal beam group and index information in the orthogonal beam group corresponding to each layer;

or,

each layer in all layers of the CSI information of the terminal independently selects an orthogonal beam group, each layer independently selects an orthogonal beam in the corresponding orthogonal beam group, and the CSI report comprises index information of the orthogonal beam group corresponding to each layer and index information in the orthogonal beam group corresponding to each layer.

In a fourth aspect, an embodiment of the present invention provides an information reporting method, which is applied to a network device, and includes:

receiving a CSI report from a terminal;

In a fifth aspect, an embodiment of the present invention provides an information reporting method, which is applied to a network device, and includes:

receiving a CSI report from a terminal;

In a sixth aspect, an embodiment of the present invention provides an information reporting method, applied to a network device, including:

receiving a CSI report from a terminal;

all layers of the CSI information of the terminal select the same orthogonal beam group, each layer of the all layers independently selects an orthogonal beam in the orthogonal beam group, and the CSI report comprises index information of the orthogonal beam group and index information in the orthogonal beam group corresponding to each layer;

or,

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

a first sending module, configured to send a CSI report to a network device;

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

a second sending module, configured to send a CSI report to the network device;

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

a third sending module, configured to send a CSI report to the network device;

or,

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

a first receiving module for receiving a CSI report from a terminal;

the reference subband is a subband adjacent to the first subband or a subband for feeding back CSI (channel state information).

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

a second receiving module for receiving a CSI report from a terminal;

wherein the CSI report includes CSI information of at least one second subband, the second subband exists in subband groups, and each subband group includes one second subband.

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

a third receiving module, configured to receive a CSI report from the terminal;

or,

In a thirteenth aspect, an embodiment of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the computer program, when executed by the processor, may implement the steps of the information reporting method applied to the terminal.

In a fourteenth aspect, an embodiment of the present invention provides a network device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the computer program, when executed by the processor, may implement the steps of the information reporting method applied to the network device.

In a fifteenth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored thereon, where the computer program, when being executed by a processor, can implement the steps of the information reporting method applied to a terminal or the steps of the information reporting method applied to a network device.

In the embodiment of the invention, the CSI report can be further compressed by utilizing the CSI frequency domain correlation, so that the feedback overhead of the CSI report (particularly the Type II CSI report) is reduced, and meanwhile, the increase of the CSI compression calculation complexity is limited, so that the information reporting performance of the terminal is maintained.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described 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 to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a flowchart of an information reporting method according to an embodiment of the present invention;

FIG. 2 is a diagram of one of the sub-bands in the embodiment of the present invention;

FIG. 3 is a second schematic diagram of a subband in an embodiment of the present invention;

FIG. 4 is a third schematic diagram of a subband in an embodiment of the present invention;

FIG. 5 is a fourth schematic diagram of a sub-band in an embodiment of the present invention;

fig. 6 is a second flowchart of an information reporting method according to an embodiment of the present invention;

fig. 7 is a third flowchart of an information reporting method according to an embodiment of the present invention;

fig. 8 is a fourth flowchart of an information reporting method according to an embodiment of the present invention;

fig. 9 is a fifth flowchart of an information reporting method according to an embodiment of the present invention;

fig. 10 is a sixth flowchart of an information reporting method according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 12 is a second schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 13 is a third schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 15 is a second schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 16 is a third schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 17 is a fourth schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 18 is a fourth schematic structural diagram of a network device according to an embodiment of the present invention.

Detailed Description

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, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, 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 Time 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. CDMA systems may implement Radio technologies such as CDMA2000, universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership project" (3 rd Generation Partnership project,3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3 GPP 2). 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 exemplary purposes, and uses NR terminology in much of the following description, and those skilled in the art will understand that the embodiments are only examples and not limiting, and the technical solutions of the embodiments of the present invention can 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. In addition, features described with reference to certain examples may be combined in other examples.

The wireless communication system of the embodiment of the invention comprises a terminal and network equipment. The terminal may also be referred to as a terminal Device or a User Equipment (UE), where the terminal 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 a specific type of the terminal is not limited in the embodiment of the present invention. The network device 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.

It is first pointed out that the CSI report in the embodiment of the present invention may be optionally a Type II CSI report.

Referring to fig. 1, an embodiment of the present invention provides an information reporting method, which is applied to a terminal, and the method includes the following steps:

step 101: sending a CSI report to the network equipment; the CSI report includes CSI difference information of at least one first subband.

The CSI difference information of the first subband may be any one of the following:

the difference value between the CSI information of the first sub-band and the CSI information of the reference sub-band, and the difference value between the CSI information of the first sub-band and the CSI reconstruction information.

The reference subband may be a subband adjacent to the first subband or a subband for feeding back CSI information. The CSI information of the reference subband may be understood as CSI complete information of the reference subband, which is reported in a CSI report and corresponds to a situation that CSI information is fed back on the reference subband; or, the CSI difference information of the reference subband may be recovered based on the CSI information of a certain subband and the CSI difference information of the reference subband, where the CSI difference information of the reference subband is reported in a CSI report, and corresponds to a case where the CSI difference information is fed back on the reference subband; or, the CSI information of the reference subband may be recovered based on the decompression information of the reference subband, where the CSI compressed information of the reference subband is reported in a CSI report, and the CSI compressed information is obtained by compressing CSI information of a plurality of subbands including the reference subband, and corresponds to a case where the CSI compressed information of the reference subband is fed back. When determining the CSI difference information of the first subband, it is required to ensure that the network device can recover the CSI information of the first subband by using the same information.

Optionally, the CSI reconstruction information may be CSI interpolation information or CSI decompression information.

The CSI interpolation information may be interpolated CSI information of a first subband obtained by performing interpolation calculation according to CSI information of a plurality of subbands. It can be understood that the CSI information of the multiple subbands is not limited to the CSI complete information of the corresponding subband, but may also be the CSI information recovered based on the CSI difference information of the corresponding subband, and it needs to be ensured that the network device can recover the CSI information of the first subband by using the same information. The sub-band of the plurality of sub-bands may be a first sub-band or may be a second sub-band (see subsequent description). The interpolation calculation may be a linear difference, which is not limited in the embodiment of the present invention.

The CSI decompression information may be decompressed CSI information of a first subband obtained by decompressing CSI compressed information, where the CSI compressed information is obtained by compressing CSI information of a plurality of subbands. It can be understood that the CSI information of the multiple subbands is not limited to the CSI complete information of the corresponding subband, but may also be the CSI information recovered based on the CSI compressed information of the corresponding subband, and it needs to be ensured that the network device can recover the CSI information of the first subband by using the same information. In a specific implementation, the multiple sub-bands may be all or a part of sub-bands including the first sub-band related to the terminal reporting. The compression method includes, but is not limited to, frequency domain compression, and specifically may be a compression method of orthogonal basis linear combination of frequency domain subband combination coefficients.

The information reporting method of the embodiment of the invention can further compress the CSI report by utilizing the CSI frequency domain correlation, thereby reducing the feedback overhead of the CSI report (especially the Type II CSI report), and simultaneously considering the limitation of the increase of the CSI compression calculation complexity, thereby maintaining the information reporting performance of the terminal; furthermore, the CSI interpolation information of the first sub-band is obtained on the basis of the interpolated CSI information, so that the network equipment can track the channel frequency domain information which changes rapidly.

In the embodiment of the present invention, during specific implementation, the CSI report sent by the terminal may include, in addition to the CSI difference information of the at least one first subband, CSI information of the at least one second subband (i.e., CSI complete information); or, the CSI report sent by the terminal only includes CSI information of at least one second subband. That is, when the terminal sends the CSI report, the CSI information of the partial sub-band may be fed back, and the CSI difference information is not fed back or fed back by other sub-bands except the partial sub-band.

Optionally, the CSI information of the second subband may be quantized CSI complete information, and the Type II CSI report includes an amplitude quantization value and a phase angle quantization value of the subband combination coefficient. The subband combination coefficients are specifically combination coefficients of non-zero quantization amplitudes of all layers of orthogonal beams on the corresponding subband.

That is to say, when the CSI report reported by the terminal includes CSI information of at least one second subband, the CSI information of each second subband specifically includes: the amplitude quantization value and the phase angle degree quantization value of the combined coefficient of the non-zero quantized amplitude of all layers of orthogonal beams.

Optionally, the CSI difference information may be quantized information, and may include at least one of an amplitude difference quantization value and a phase angle difference quantization value of a subband combination coefficient, which indicates a change of an amplitude and/or a phase angle with respect to an adjacent subband. The subband combination coefficient may be a combination coefficient of non-zero quantized amplitude of all layers of orthogonal beams on the corresponding subband, or a combination coefficient of non-zero quantized amplitude of partial layers of orthogonal beams on the corresponding subband.

That is to say, when the CSI report reported by the terminal includes CSI difference information of at least one first subband, the CSI difference information of each first subband may be any one of the following:

an amplitude difference quantization value of a combined coefficient of non-zero quantized amplitudes of partial-layer orthogonal beams, a phase angle difference quantization value of a combined coefficient of non-zero quantized amplitudes of partial-layer orthogonal beams, an amplitude difference quantization value and a phase angle difference quantization value of a combined coefficient of non-zero quantized amplitudes of partial-layer orthogonal beams, an amplitude difference quantization value of a combined coefficient of non-zero quantized amplitudes of all-layer orthogonal beams, a phase angle difference quantization value of a combined coefficient of non-zero quantized amplitudes of all-layer orthogonal beams, and an amplitude difference quantization value and a phase angle difference quantization value of a combined coefficient of non-zero quantized amplitudes of all-layer orthogonal beams.

In this embodiment of the present invention, optionally, when the CSI report includes CSI information of a plurality of second subbands, the plurality of second subbands may be distributed at equal intervals or distributed at unequal intervals.

For example, as shown in fig. 2, subband 1, subband 5, and subband 9 for feeding back CSI information are distributed at equal intervals; alternatively, referring to fig. 3, subbands 2, 6, and 9 for feeding back CSI information are distributed at unequal intervals.

It should be noted that, when the plurality of second sub-bands are distributed at equal intervals, the intervals between adjacent second sub-bands may be configured by the network device or agreed by the protocol. For example, the interval may be N subbands, where N is a positive integer greater than or equal to 1, and the interval of N subbands indicates that one CSI information is fed back every N +1 subbands. And the number or offset of the starting subband for feeding back CSI information (as shown in fig. 2) may be configured by the network equipment or agreed upon by the protocol.

When the plurality of second subbands are distributed at unequal intervals, the terminal may determine the number of the subband for feeding back the CSI information, or the network device configures the number of the subband for feeding back the CSI information, or the protocol may agree with a plurality of subband number sets for feeding back the CSI information and the terminal selects one subband number set from the subband number sets (at this time, the selected subband number set needs to be fed back to the network device). The criterion for determining or configuring the number of the sub-band for feeding back the CSI information may be that, according to the change of the channel frequency domain, several consecutive sub-bands with similar CSI information feed back one CSI information. For example, referring to fig. 3, based on the peak or trough of the channel frequency domain variation, the sub-bands 2, 6 and 9 for feeding back CSI information may be determined respectively.

In this embodiment of the present invention, optionally, the first subband may exist in the form of a subband group, and the reference subband and the first subband may belong to the same subband group or different subband groups.

For example, in one embodiment, the CSI difference information for the first subband 1 in the subband group a is determined based on the recovered CSI information for the first subband 2 adjacent to the first subband 1 in the subband group a and the CSI information for the first subband 1.

In another embodiment, the CSI difference information of the first subband 1 in the subband group a is determined based on the CSI information of the second subband (for which CSI complete information is fed back) in the subband group a and the CSI information of the first subband 1.

In another embodiment, the CSI difference information of the first subband 1 in the subband group a is determined based on the CSI information of the second subband (for which CSI complete information is fed back) in the subband group a and the interpolated or decompressed CSI information of the first subband 1.

In another embodiment, the CSI difference information for the first subband 1 in subband group a is determined based on the CSI information for the second subband (for which CSI is fed back) in subband group b and the CSI information for the first subband 1.

In another embodiment, one subband group may include a second subband feeding back CSI complete information, and the subbands in other subband groups are all first subbands, and CSI difference information may be determined based on CSI complete information of the second subband in the subband group.

Alternatively, when the first subband exists in a subband group, the number of subbands included in different subband groups may be the same or different. And each band group may include one or more subbands for feeding back CSI information.

For example, referring to fig. 2, three subbands may be divided into one subband group, that is, the number of subbands included in subband group a, subband group b, and subband group c is 3, and each subband group includes one subband (second subband) feeding CSI information back, that is, subband 1, subband 2, and subband 9; alternatively, referring to fig. 3, the number of subbands included in different subband groups may be different, for example, 3 subbands are included in subband group d, 5 subbands are included in subband group e, 1 subband is included in subband group f, and each subband group includes one subband (second subband) feeding CSI information back, that is, subband 2, subband 6, and subband 9.

It should be noted that, when dividing the subband group by the same number of subbands, if the number of terminal subbands cannot be divided, the last remaining subbands may be classified as head or tail, for example, subband 0 in fig. 2 may be classified as subband group a. The information about the subband groups (e.g., the number of subbands included in each subband group, the dividing method of the subband groups, etc.) may be configured by the network device or determined by the terminal. When the terminal determines that the CSI information of the subband group is similar to the CSI information of the subband group, the terminal may determine, according to the frequency domain variation of the channel, that at least one subband group with similar CSI information is divided into one subband group, that is, the variation (amplitude or/and phase angle) of the combining coefficient in one subband group is lower than a preset threshold. When the network device is configured, if the network device is configured with multiple subband group schemes, and each subband group scheme allocates subbands to different subband groups, the terminal may select one subband group scheme from the multiple subband group schemes and report the subband group scheme index to the network device.

In this embodiment of the present invention, optionally, when the CSI report includes CSI difference information of a plurality of first subbands, the number of difference quantization bits or the difference quantization step corresponding to the CSI difference information of the plurality of first subbands may be different. That is, in the plurality of first subbands, the number of difference quantization bits (for example, 2 bits) of the CSI difference information of some first subbands may be greater than the number of difference quantization bits (for example, 1 bit) of the CSI difference information of other first subbands; or the difference quantization step size of the CSI difference information of a part of first sub-bands is longer than that of the CSI difference information of other parts of first sub-bands.

In this way, since a larger number of difference quantization bits or a longer difference quantization step represents a larger difference range, the CSI difference information of the first subband is quantized by different difference quantization bits or difference quantization steps, and the channel frequency domain information that changes rapidly can be tracked.

It should be noted that, in a specific implementation, the position of the sub-band in the feedback large difference range may be predefined, or may be adaptively selected by the terminal according to the channel variation condition.

Next, a detailed description is given of the CSI difference information determining process in the embodiment of the present invention with reference to fig. 4 and 5.

In the embodiment of the present invention, referring to fig. 4, subband 0, subband 2, subband 6, and subband 8 may be predefined as subband positions for feeding back large difference ranges, and difference quantization (such as phase angle difference quantization) may be performed using 2 bits, while the subbands for feeding back CSI difference information (such as small difference ranges), that is, subband 1, subband 3, subband 5, subband 7, and subband 9, may be subjected to difference quantization (such as phase angle difference quantization) using 1 bit; and subband 4 feeds back the complete CSI information. Thus, for subband 5, difference calculation may be performed according to CSI quantization information (quantization information of CSI actual information) of subband 4 and CSI actual information (unquantized actual CSI information) of subband 5 to obtain CSI difference information of subband 5, and difference quantization may be performed using 1 bit; for the sub-band 6, difference calculation can be performed according to the CSI information restored by the sub-band 5 (i.e., CSI difference information based on the sub-band 5 and CSI quantized information of the sub-band 4 are restored) and the CSI actual information of the sub-band 6 to obtain CSI difference information of the sub-band 6, and difference quantization is performed by using 2 bits; for subband 7, difference calculation may be performed according to CSI information restored by subband 6 (i.e., CSI difference information restored based on subband 6 and CSI information restored by subband 5) and CSI actual information of subband 7 to obtain CSI difference information of subband 7, and difference quantization may be performed using 1 bit; for the quantization process of the sub-bands 8, 9, etc., see above, and will not be described herein.

As shown in fig. 5, assuming that the terminal determines that the subband 4 is a subband number for feeding back complete CSI information, and other subbands feed back CSI difference information, and the CSI difference information of the subband 0 and the subband 8 is a difference value with the CSI information of the subband 4, and the CSI difference information of the subband 1, the subband 2, the subband 3, the subband 5, the subband 6, the subband 7, and the subband 9 is a difference value with the CSI information after interpolation calculation, for the subband 5, CSI information (i.e., CSI interpolation information) after interpolation of the subband 5 may be obtained according to interpolation calculation of the CSI information of the subband 0, the subband 4, and the subband 8, and then difference calculation is performed according to CSI interpolation information of the subband 5 and CSI actual information (unquantized) of the subband 5, so as to obtain CSI difference information of the subband 5 and perform difference quantization; for the sub-band 6, the CSI information (i.e., CSI interpolation information) interpolated by the sub-band 6 can be obtained according to the interpolation calculation of the CSI information of the sub-band 0, the sub-band 4, and the sub-band 8, and then the difference calculation is performed according to the CSI interpolation information of the sub-band 6 and the CSI actual information (unquantized) of the sub-band 6 to obtain the CSI difference information of the sub-band 6 and perform difference quantization; for the sub-band 7, the CSI information (i.e., CSI interpolation information) interpolated in the sub-band 7 can be obtained according to the interpolation calculation of the CSI information of the sub-band 0, the sub-band 4, and the sub-band 8, and then the difference calculation is performed according to the CSI interpolation information of the sub-band 7 and the CSI actual information (unquantized) of the sub-band 7 to obtain the CSI difference information of the sub-band 7 and perform difference quantization; for the sub-band 8, difference calculation can be performed according to the CSI information of the sub-band 8 and the complete CSI information of the sub-band 4 to obtain CSI difference information of the sub-band 8; for the interpolation process of sub-bands 1, 2, 3, 9, etc., reference is made to the above description, and the description is omitted here.

In the embodiment of the present invention, the network device may configure at least one selectable reporting mode of a CSI report (for example, a Type II CSI report) for the terminal through signaling, where the reporting mode may be a Type II CSI reporting mode of Rel-15 or another newly added compressed CSI reporting mode.

Optionally, before step 101, the method further includes:

receiving configuration information from a network device;

the configuration information is used for indicating at least one CSI reporting mode configured for the terminal.

Further, when the configuration information is used to indicate a CSI reporting mode configured for the terminal, step 101 may include:

sending a CSI report to the network equipment according to the CSI report mode;

alternatively, when the configuration information is used to indicate at least two CSI reporting manners configured for the terminal, step 101 may include:

selecting a first CSI reporting mode from the at least two CSI reporting modes;

sending a CSI report to the network equipment according to the first CSI report mode; the CSI report comprises information used for indicating a first CSI reporting mode, and the selected first CSI reporting mode is reported to the network equipment.

It should be noted that the information for indicating the first CSI reporting mode may be included in Part 1 of the CSI report, so that the load size of Part 2 may be determined. And when the terminal selects the first CSI reporting mode, the terminal may determine the size of the bearable load according to the allocated PUSCH resource and the code rate, and further select the reporting mode with the least information loss.

If the resources allocated by the network device cannot accommodate a complete CSI report, the terminal may discard CSI difference information of some first subbands first and then discard CSI information of some second subbands first and then according to the priority order when sending the CSI report.

Referring to fig. 6, an embodiment of the present invention further provides an information reporting method, which is applied to a terminal, and the method includes the following steps:

step 601: sending a CSI report to the network device; the CSI report includes CSI information of at least one second subband.

Wherein the second sub-bands are in the form of sub-band groups, and each sub-band group comprises one second sub-band.

Therefore, the CSI information is fed back in the form of the subband group, and the network equipment can conveniently track the rapidly-changing channel frequency domain information.

Optionally, the number of subbands included in different subband groups is the same or different.

It should be noted that, in the embodiment of the present invention, the CSI report may include, in addition to the CSI information of the at least one second subband, CSI difference information of the at least one first subband, and for a description related to the CSI difference information of the first subband, reference may be made to the foregoing embodiment, which is not described herein again.

Referring to fig. 7, an embodiment of the present invention further provides an information reporting method, which is applied to a terminal, and the method includes the following steps:

step 701: and sending the CSI report to the network equipment.

Wherein, all layers (for example, in bandwidth) of CSI information of the terminal select the same orthogonal beam group, and each layer independently selects an orthogonal beam in the orthogonal beam group, and the CSI report includes index information of the orthogonal beam group and index information in the orthogonal beam group corresponding to each layer;

or, each of all layers of the CSI information of the terminal independently selects an orthogonal beam group (e.g., on a bandwidth) and each layer independently selects an orthogonal beam in the corresponding orthogonal beam group, and the CSI report includes index information of the orthogonal beam group corresponding to each layer and index information in the orthogonal beam group corresponding to each layer.

Therefore, by means of the CSI report reported by the terminal, the network equipment can acquire the orthogonal beam information related to the terminal.

Referring to fig. 8, an embodiment of the present invention further provides an information reporting method, which is applied to a network device, and the method includes the following steps:

step 801: receiving a CSI report from a terminal; the CSI report includes CSI difference information of at least one first subband.

Wherein the CSI difference information of the first subband is any one of:

In the embodiment of the invention, the CSI report can be further compressed by utilizing the CSI frequency domain correlation, so that the feedback overhead of the CSI report (particularly Type II CSI report) is reduced, and meanwhile, the increase of the CSI compression calculation complexity is limited, so that the information reporting performance of the terminal is maintained.

It should be noted that, when the CSI difference information of the first subband is a difference between the CSI information of the first subband and the CSI interpolation information, after receiving the CSI report, the network device may first restore the CSI information of the second subband and the CSI information of the subband required for interpolation calculation, then perform interpolation calculation that is the same as that of the terminal (including an interpolation calculation manner, the subband required for interpolation calculation, and the like), to obtain the CSI information of the first subband after interpolation, and finally calculate the CSI information of the first subband according to the CSI difference information of the first subband and the CSI information of the first subband after interpolation.

In the embodiment of the present invention, optionally, the CSI reconstruction information is CSI interpolation information or CSI decompression information; the CSI interpolation information is the CSI information of the first sub-band after interpolation, which is obtained by performing interpolation calculation according to the CSI information of a plurality of sub-bands; the CSI decompression information is the decompressed CSI information of the first sub-band obtained by decompressing the CSI compression information, and the CSI compression information is obtained by compressing the CSI information of a plurality of sub-bands

Optionally, the first subband is in the form of a subband group, and the reference subband and the first subband belong to the same subband group or different subband groups.

Optionally, the first subband exists in a subband group, and the number of subbands included in different subband groups is the same or different.

Optionally, when the CSI report includes CSI difference information of a plurality of first subbands, difference quantization bit numbers or difference quantization step sizes corresponding to the CSI difference information of the plurality of first subbands are different.

Optionally, the CSI report further includes CSI information of at least one second subband;

when the CSI report includes CSI information of a plurality of second subbands, the plurality of second subbands are distributed at equal intervals or distributed at unequal intervals.

Optionally, before the step 801, the method further includes:

sending configuration information to the terminal;

Optionally, when the configuration information is used to indicate a CSI reporting mode configured for the terminal, step 801 may include:

receiving the CSI report sent by the terminal according to the CSI report mode;

or,

when the configuration information is used to indicate at least two CSI reporting modes configured for the terminal, the receiving a CSI report from the terminal includes:

receiving the CSI report sent by the terminal according to a first CSI report mode; the first CSI reporting mode is selected by the terminal from the at least two CSI reporting modes, and the CSI report comprises information used for indicating the first CSI reporting mode.

Referring to fig. 9, an embodiment of the present invention further provides an information reporting method, which is applied to a network device, and the method includes the following steps:

step 901: receiving a CSI report from a terminal; the CSI report includes CSI information of at least one second subband.

Referring to fig. 10, an embodiment of the present invention further provides an information reporting method, which is applied to a network device, and the method includes the following steps:

step 110: a CSI report is received from a terminal.

or,

The above embodiment describes the information reporting method of the present invention, and the following describes the terminal and the network device of the present invention with reference to the embodiment and the drawings.

Referring to fig. 11, an embodiment of the present invention further provides a terminal 11, including:

a first sending module 111, configured to send a CSI report to a network device;

In the embodiment of the present invention, optionally, the CSI reconstruction information is CSI interpolation information or CSI decompression information; the CSI interpolation information is the CSI information of the first sub-band after interpolation, which is obtained by performing interpolation calculation according to the CSI information of a plurality of sub-bands; the CSI decompression information is decompressed CSI information of the first subband, and the CSI compressed information is obtained by compressing CSI information of a plurality of subbands.

Optionally, the terminal further includes:

a fourth receiving module, configured to receive configuration information from the network device;

Optionally, when the configuration information is used to indicate a CSI reporting mode configured for the terminal, the first sending module 111 is specifically configured to:

sending a CSI report to the network equipment according to the CSI report mode;

or,

when the configuration information is used to indicate at least two CSI reporting manners configured for the terminal, the first sending module 111 is specifically configured to:

selecting a first CSI reporting mode from the at least two CSI reporting modes;

sending a CSI report to the network equipment according to the first CSI report mode; wherein the CSI report includes information indicating the first CSI reporting mode.

Referring to fig. 12, an embodiment of the present invention further provides a terminal 12, including:

a second sending module 121, configured to send a CSI report to the network device;

Referring to fig. 13, an embodiment of the present invention further provides a terminal 13, including:

a third sending module 131, configured to send a CSI report to the network device;

or,

Referring to fig. 14, an embodiment of the present invention further provides a network device 14, including:

a first receiving module 141, configured to receive a CSI report from a terminal;

In the embodiment of the present invention, optionally, the CSI reconstruction information is CSI interpolation information or CSI decompression information; the CSI interpolation information is the CSI information of the first sub-band after interpolation, which is obtained by performing interpolation calculation according to the CSI information of a plurality of sub-bands; the CSI decompression information is obtained by decompressing CSI compressed information of the first sub-band, and the CSI compressed information is obtained by compressing CSI information of a plurality of sub-bands.

Optionally, the network device further includes:

a fourth sending module, configured to send configuration information to the terminal;

Optionally, when the configuration information is used to indicate a CSI reporting mode configured for the terminal, the first receiving module 141 is specifically configured to:

receiving the CSI report sent by the terminal according to the CSI report mode;

or,

when the configuration information is used to indicate at least two CSI reporting manners configured for the terminal, the first receiving module 141 is specifically configured to include:

Referring to fig. 15, an embodiment of the present invention further provides a network device 15, including:

a second receiving module 151, configured to receive a CSI report from a terminal;

Referring to fig. 16, an embodiment of the present invention further provides a network device 16, including:

a third receiving module 161, configured to receive a CSI report from the terminal;

or,

The embodiment of the present invention further provides a terminal, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the above-mentioned information reporting method applied to the terminal, and can achieve the same technical effect, and is not described herein again to avoid repetition.

Specifically, fig. 17 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention, where the terminal 1700 includes, but is not limited to: radio frequency unit 1701, network module 1702, audio output unit 1703, input unit 1704, sensor 1705, display unit 1706, user input unit 1707, interface unit 1708, memory 1709, processor 1710, and power supply 1711. Those skilled in the art will appreciate that the terminal configuration shown in fig. 17 is not intended to be limiting, 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 1701 is configured to send a CSI report to the network device; the CSI report comprises CSI difference information of at least one first subband; the CSI difference information of the first subband is any one of: the difference value of the CSI information of the first sub-band and the CSI information of the reference sub-band and the difference value of the CSI information of the first sub-band and the CSI reconstruction information; the reference subband is a subband adjacent to the first subband or a subband for feeding back CSI information.

Or, the radio frequency unit 1701 is configured to send a CSI report to the network device; the CSI report comprises CSI information of at least one second subband, the second subband exists in a subband group form, and each subband group comprises one second subband.

Or, the radio frequency unit 1701 is configured to send a CSI report to the network device; all layers of the CSI information of the terminal select the same orthogonal beam group, each layer independently selects orthogonal beams in the orthogonal beam group, and the CSI report comprises index information of the orthogonal beam group and index information in the orthogonal beam group corresponding to each layer; or each layer in all layers of the CSI information of the terminal independently selects an orthogonal beam group, and each layer independently selects an orthogonal beam in the corresponding orthogonal beam group, and the CSI report includes index information of the orthogonal beam group corresponding to each layer and index information in the orthogonal beam group corresponding to each layer.

It should be understood that, in the embodiment of the present invention, the rf unit 1701 may be configured to receive and transmit signals during a message transmission or a call, and specifically, receive downlink data from a base station and then process the received downlink data to the processor 1710; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 1701 includes, but is not limited to, an antenna, at least one amplifier, transceiver, coupler, low noise amplifier, duplexer, and the like. The radio frequency unit 1701 may also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 1702, such as to assist the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 1703 may convert audio data received by the radio frequency unit 1701 or the network module 1702 or stored in the memory 1709 into an audio signal and output as sound. Also, the audio output unit 1703 may provide audio output related to a specific function performed by the terminal 1700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 1703 includes a speaker, a buzzer, a receiver, and the like.

Input unit 1704 is used to receive audio or video signals. The input Unit 1704 may include a Graphics Processing Unit (GPU) 17041 and a microphone 17042, the Graphics processor 17041 Processing image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 1706. The image frames processed by the graphics processor 17041 may be stored in the memory 1709 (or other storage medium) or transmitted via the radio frequency unit 1701 or the network module 1702. The microphone 17042 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 1701 in the case of the phone call mode.

Terminal 1700 also includes at least one sensor 1705, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 17061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 17061 and/or a backlight when the terminal 1700 is moved 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 1705 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described herein.

The display unit 1706 is used to display information input by the user or information provided to the user. The Display unit 1706 may include a Display panel 17061, and the Display panel 17061 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 1707 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 1707 includes a touch panel 17071 and other input devices 17072. The touch panel 17071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 17071 (e.g., operations by a user on or near the touch panel 17071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 17071 may include two parts of 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 detection device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 1710, and receives and executes commands sent by the processor 1710. In addition, the touch panel 17071 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 17071, the user input unit 1707 may include other input devices 17072. In particular, the other input devices 17072 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.

Further, the touch panel 17071 may be overlaid on the display panel 17061, and when the touch panel 17071 detects a touch operation on or near the touch panel 17071, the touch operation is transmitted to the processor 1710 to determine the type of the touch event, and then the processor 1710 provides a corresponding visual output on the display panel 17061 according to the type of the touch event. Although the touch panel 17071 and the display panel 17061 are shown in fig. 17 as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 17071 and the display panel 17061 may be integrated to implement the input and output functions of the terminal, and this is not limited herein.

Interface unit 1708 is an interface for connecting an external device to terminal 1700. 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. Interface unit 1708 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 terminal 1700 or may be used to transmit data between terminal 1700 and an external device.

The memory 1709 may be used to store software programs as well as various data. The memory 1709 may mainly include a program storage area and a data storage area, where 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 1709 may include high speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid state storage device.

The processor 1710 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 1709 and calling data stored in the memory 1709, thereby integrally monitoring the terminal. Processor 1710 may include one or more processing units; preferably, the processor 1710 can integrate an application processor, which primarily handles operating systems, user interfaces, application programs, etc., and a modem processor, which primarily handles wireless communications. It is to be appreciated that the modem processor described above may not be integrated into processor 1710.

Terminal 1700 may also include a power supply 1711 (e.g., a battery) for powering the various components, and preferably, power supply 1711 may be logically coupled to processor 1710 via a power management system that provides functionality for managing charging, discharging, and power consumption.

In addition, the terminal 1700 may further include some functional modules that are not shown, and are not described herein again.

The embodiment of the present invention further provides a network device, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when being executed by the processor, the computer program implements each process of the above-mentioned information reporting method applied to the network device, and can achieve the same technical effect, and is not described herein again to avoid repetition.

Specifically, fig. 18 is a schematic diagram of a hardware structure of a network device for implementing various embodiments of the present invention, where the network device 180 includes but is not limited to: bus 181, transceiver 182, antenna 183, bus interface 184, processor 185, and memory 186.

In this embodiment of the present invention, the network device 180 further includes: computer programs stored on the memory 186 and executable on the processor 185.

Wherein the computer program when executed by the processor 185 performs the steps of:

receiving a CSI report from a terminal;

wherein the CSI report comprises CSI difference information of at least one first subband; the CSI difference information of the first subband is any one of: the difference value of the CSI information of the first sub-band and the CSI information of the reference sub-band and the difference value of the CSI information of the first sub-band and the CSI reconstruction information; the reference subband is a subband adjacent to the first subband or a subband for feeding back CSI information.

Alternatively, the computer program when executed by the processor 185 performs the steps of:

receiving a CSI report from a terminal;

or,

A transceiver 182 for receiving and transmitting data under the control of a processor 185.

In FIG. 18, a bus architecture (represented by bus 181), the bus 181 may include any number of interconnected buses and bridges, the bus 181 linking together various circuits including one or more processors represented by processor 185 and memory represented by memory 186. The bus 181 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 184 provides an interface between the bus 181 and the transceiver 182. The transceiver 182 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 185 is transmitted over a wireless medium via the antenna 183, and further, the antenna 183 receives the data and transmits the data to the processor 185.

The processor 185 is responsible for managing the bus 181 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory 186 may be used to store data used by the processor 185 in performing operations.

Alternatively, the processor 185 may be a CPU, ASIC, FPGA, or CPLD.

The 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 being executed by a processor, the computer program can implement each process of the above-mentioned information reporting method applied to a terminal, or each process of the above-mentioned information reporting method applied to a network device, and can achieve the same technical effect, and in order to avoid repetition, the computer program is not described here again. The computer-readable storage medium is, for example, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An information reporting method is applied to a terminal, and is characterized by comprising the following steps:

sending a Channel State Information (CSI) report to the network equipment;

a difference value between the CSI information of the first sub-band and the CSI information of a reference sub-band, and a difference value between the CSI information of the first sub-band and the CSI reconstruction information;

the reference subband is a subband adjacent to the first subband or a subband for feeding back CSI (channel state information);

the CSI reconstruction information is CSI interpolation information or CSI decompression information; the CSI interpolation information is the CSI information of the first sub-band after interpolation, which is obtained by performing interpolation calculation according to the CSI information of a plurality of sub-bands; the CSI decompression information is decompressed CSI information of the first subband, and the CSI compressed information is obtained by compressing CSI information of a plurality of subbands.

2. The method of claim 1, wherein the first subband is in the form of a subband group, and wherein the reference subband belongs to the same subband group as the first subband or a different subband group.

3. The method of claim 1, wherein the first subband is in the form of a subband group, and wherein the number of subbands included in different subband groups is the same or different.

4. The method of claim 1, wherein when the CSI report includes CSI difference information of a plurality of first subbands, the number of difference quantization bits or the difference quantization step corresponding to the CSI difference information of the plurality of first subbands is different.

5. The method of claim 1, wherein the CSI report further comprises CSI information for at least one second subband;

6. The method of claim 1, wherein prior to sending the Channel State Information (CSI) report to the network device, the method further comprises:

receiving configuration information from the network device;

7. The method of claim 6, wherein when the configuration information is used to indicate a CSI reporting mode configured for the terminal, the sending a CSI report to the network device comprises:

sending a CSI report to the network equipment according to the CSI report mode;

or,

when the configuration information is used to indicate at least two CSI reporting modes configured for the terminal, the sending a CSI report to a network device includes:

selecting a first CSI reporting mode from the at least two CSI reporting modes;

8. An information reporting method is applied to a network device, and is characterized by comprising the following steps:

receiving a CSI report from a terminal;

9. The method of claim 8, wherein the first subband is in the form of a subband group, and wherein the reference subband belongs to the same subband group as the first subband or a different subband group.

10. The method of claim 8, wherein the first subband is in the form of a subband group, and wherein the number of subbands included in different subband groups is the same or different.

11. The method of claim 8, wherein when the CSI report includes CSI difference information of a plurality of first subbands, the number of difference quantization bits or the difference quantization step corresponding to the CSI difference information of the plurality of first subbands is different.

12. The method of claim 8, wherein the CSI report further comprises CSI information for at least one second subband;

13. The method of claim 8, wherein prior to receiving the CSI report from the terminal, the method further comprises:

sending configuration information to the terminal;

14. The method of claim 13, wherein when the configuration information indicates a CSI reporting mode configured for the terminal, the receiving CSI report from the terminal comprises:

receiving the CSI report sent by the terminal according to the CSI report mode;

or,

15. A terminal, comprising:

a first sending module, configured to send a CSI report to a network device;

16. A network device, comprising:

a first receiving module for receiving a CSI report from a terminal;

a difference value between the CSI information of the first sub-band and the CSI information of a reference sub-band, and a difference value between the CSI information of the first sub-band and the CSI interpolation information;

17. A terminal comprising a memory, a processor and a computer program stored on the memory and operable on the processor, wherein the computer program, when executed by the processor, implements the steps of the information reporting method according to any one of claims 1 to 7.

18. A network device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the information reporting method according to any one of claims 8 to 14.

19. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the information reporting method according to one of claims 1 to 7 or the steps of the information reporting method according to one of claims 8 to 14.