CN111263400B - Method and terminal for discarding CSI report - Google Patents
Method and terminal for discarding CSI report Download PDFInfo
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- CN111263400B CN111263400B CN201811535561.6A CN201811535561A CN111263400B CN 111263400 B CN111263400 B CN 111263400B CN 201811535561 A CN201811535561 A CN 201811535561A CN 111263400 B CN111263400 B CN 111263400B
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Abstract
The embodiment of the invention provides a method and a terminal for discarding a CSI report, wherein the method comprises the following steps: and discarding part or all compression coefficients of the first CSI report if the current CSI report to be discarded is determined to be the first CSI report according to the sequence in the CSI report to be fed back. The embodiment of the invention can discard the CSI report.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a terminal for discarding a channel state information (Channel State Information, CSI) report.
Background
The CSI report is fed back by using uplink resources allocated by the network side, for example, a physical uplink control channel (Physical uplink control channel, PUCCH) or a physical uplink shared channel (Physical uplink shared channel, PUSCH), and in practical application, the network side cannot determine the payload size of the CSI report in advance, so that the allocated uplink resources cannot accommodate all contents of the lower CSI report. The current New Radio, NR, version Rel-15 is discarded in order of all odd subbands and all even subbands of the CSI report in this case, so that the allocated uplink resource can accommodate the discarded CSI report. However, NR Rel-16 compresses the combined coefficients of the CSI codebook of Type II to obtain a compressed coefficient in order to reduce the feedback overhead of the CSI report of Type 2 (Type II CSI), where the fed back CSI report includes the compressed coefficient. However, the CSI report enhanced or compressed based on the Type II CSI report cannot differentiate the subbands by its compression coefficient, and thus cannot be discarded in the subband order, so that the CSI report cannot be discarded.
Disclosure of Invention
The embodiment of the invention provides a method and a terminal for discarding a CSI report, which are used for solving the problem that the CSI report cannot be discarded.
In a first aspect, an embodiment of the present invention provides a method for discarding a CSI report, which is applied to a terminal, and includes:
and discarding part or all compression coefficients of the first CSI report if the current CSI report to be discarded is determined to be the first CSI report according to the sequence in the CSI report to be fed back.
In a second aspect, an embodiment of the present invention provides a terminal, including:
and the discarding module is used for discarding part or all of the compression coefficients of the first CSI report if the current CSI report to be discarded is determined to be the first CSI report according to the sequence in the CSI reports to be fed back.
In a third aspect, an embodiment of the present invention provides a terminal, including: the system comprises a memory, a processor and a program stored in the memory and capable of running on the processor, wherein the program is executed by the processor to realize the steps in the method for discarding the CSI report provided by the embodiment of the invention.
In a fourth 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, where the computer program when executed by a processor implements steps in a method for discarding CSI reports provided by an embodiment of the present invention.
The embodiment of the application can discard the CSI report.
Drawings
FIG. 1 is a block diagram of a network system to which embodiments of the present application are applicable;
fig. 2 shows a flowchart of a method for discarding CSI reports according to an embodiment of the present application;
fig. 3 is a block diagram of a terminal according to an embodiment of the present application;
fig. 4 is a block diagram of another terminal according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "comprises," "comprising," or any other variation 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 but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means at least one of the connected objects, e.g., a and/or B, meaning that it includes a single a, a single B, and that there are three cases of a and B.
In embodiments of the invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Embodiments of the present invention are described below with reference to the accompanying drawings. The codebook information feedback method, the terminal and the network equipment provided by the embodiment of the invention can be applied to a wireless communication system. The wireless communication system may be a 5G system, or an evolved long term evolution (Evolved Long Term Evolution, lte) system, or a subsequent evolved communication system.
Referring to fig. 1, fig. 1 is a block diagram of a network system to which an embodiment of the present invention is applicable, and as shown in fig. 1, the network system includes a terminal 11 and a network device 12, where the terminal 11 may be a User Equipment (UE) or other terminal side devices, for example: terminal-side devices such as a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer), a personal digital assistant (personal digital assistant, PDA for short), a mobile internet Device (Mobile Internet Device, MID) or a Wearable Device (weardable Device), it should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a 4G base station, or a 5G base station, or a later version base station, or a base station in other communication systems, or referred to as a node B, an evolved node B, or a transmission receiving Point (TRP, transmission Reception Point), or an Access Point (AP), or other words in the field, and the network device is not limited to a specific technical word as long as the same technical effect is achieved. In addition, the network device 12 may be a Master Node (MN) or a Secondary Node (SN). It should be noted that, in the embodiment of the present invention, only a 5G base station is taken as an example, but the specific type of the network device is not limited.
Referring to fig. 2, fig. 2 is a flowchart of a method for discarding CSI reports, which is applied to a terminal and shown in fig. 2, and includes the following steps:
step 201, discarding part or all compression coefficients of a first CSI report if it is determined that the current CSI report to be discarded is the first CSI report according to the order in the CSI reports to be fed back.
The CSI report to be fed back may include one or more CSI reports reported on one uplink resource (PUCCH or PUSCH). When the CSI report to be fed back includes multiple CSI reports, the multiple CSI reports are mapped to the uplink resource according to a certain order, for example, according to the priority order of the CSI reports, or the sequence number order of the CSI reports, etc. In addition, the order here may be defined in a protocol, or configured by a terminal, or pre-negotiated with a terminal by a network device, or the like.
In addition, the determining that the CSI report to be discarded currently according to the order in the CSI report to be fed back is the first CSI report may be determining that the CSI report to be discarded currently is the first CSI report in the process of sequentially discarding the CSI report in the CSI report to be fed back according to the mapping order of the plurality of CSI reports on the uplink resource. In addition, if the CSI report to be fed back also includes other CSI reports, the other CSI reports may be discarded step by step in parity subband order, for example: these other CSI reports may be uncompressed second CSI reports.
It should be noted that, the CSI report to be fed back may include one or more types of CSI reports, for example: including CSI reporting of Type 1 (Type I) and/or CSI reporting of Type 2 (Type II) and/or beam Type CSI reporting and/or non-precoding matrix indication (non-PMI) CSI reporting, etc. And may also include compressed CSI reports, or may also include uncompressed CSI reports.
The first CSI report may be an enhanced or compressed CSI report based on the CSI report of Type II, for example: the CSI report with time domain compression may be the combined coefficient of the CSI report of Type II, or the CSI report with frequency domain compression may be the combined coefficient of the CSI report of Type II, or the CSI report with further compression may be the combined coefficient of the CSI report of Type II.
The time domain compression may be to transform the frequency domain coefficients in the matrix to be compressed into time domain coefficients by a matrix formed by at least one compression vector (i.e., inverse discrete fourier transform IDFT), and then select a part of the time domain coefficients. The frequency domain compression may be performed by transforming the combined coefficient matrix to be compressed by at least one compression vector, so as to obtain a compressed coefficient matrix with a matrix dimension smaller than that of the combined coefficient matrix to be compressed.
Hereinafter W is given as 2,r A matrix of combining coefficients representing Type II CSI to be compressed for layer r, wherein for example: a combined coefficient matrix of all frequency domain granularity (sub-band or resource block RB) or a combined coefficient matrix representing partial frequency domain granularity obtained after sampling, W 3 Representing an orthogonal matrix of the at least one compressed vector and using W 3 For W 2,r Performing orthogonal transformation to obtainFrom W 3 Is->The combined coefficient compression process for Type II CSI is illustrated:
cascading all the frequency domain granularity combined coefficients of the CSI of the Type II together can obtain the representation form of M frequency domain granularity precoding matrixes of the layer r on the frequency domain, wherein the representation form is as follows:
wherein the method comprises the steps ofThe combination coefficients of the first (l=0, 1, …, 2L-1) orthogonal spatial beam vectors at the frequency domain granularity m for layer R (r=1, 2, …, R). W (W) 2,r The first line in (b) represents the spatial beam vector b' l Combining coefficients at all frequency domain granularity.
W 2,r The combination coefficients in the system can be further compressed by adopting an orthogonal baseline combination method. For the combination coefficient matrix W 2,r Performing orthogonal transformation W 3 I.e.From W 3 Is obtained by the orthogonality ofFor example W 3 May be an M x M dimensional discrete fourier transform (Discrete Fourier Transform, DFT) matrix or an inverse discrete fourier transform (Inverse Discrete Fourier Transform, IDFT) matrix or a right singular matrix, etc.
If W is 3 From selected X<M important orthogonal vectors are used as compression vectors, and the same X orthogonal vectors are selected as the compression vectors by the combination coefficients corresponding to all orthogonal space beam vectors, so that W can be approximately recovered 2,r I.e.For example W 3 Including the selected X orthogonal DFT vectors, or the X right dominant singular vectors after singular value decomposition (Singular Value Decomposition, SVD), etc.
Thus the content requiring feedback is composed of W in 2L x M dimension 2,r Changed to 2L X dimensionAnd the number of the selected X compression vectors. Thus, the complex number of each layer needing feedback is reduced from 2LM to 2LX, and the compression feedback of the combined coefficient is realized.
The representation of the precoding matrix of the compressed Type II based CSI codebook for layer r in the frequency domain can be written as
Wherein, the aboveIs a space beam vector matrix, wherein N 1 、N 2 The number of ports for channel state information reference signals (Channel State Information-Reference Signaling, CSI-RS) in two dimensions, respectively. Wherein, the->A compression coefficient matrix representing a first CSI report, and +.>Representing a spatial beam vector matrix, and +.>Representing a compressed vector matrix corresponding to the spatial beam vector matrix.
In addition, one row of the compression coefficient matrix corresponds to one spatial beam vector of the spatial beam vector matrix, and one column of the compression coefficient matrix corresponds to one compression vector of the compression vector matrix.
Of course, the foregoing is merely illustrative of time domain compression and frequency domain compression, and is not limited thereto, for example: the first CSI report in the embodiment of the present invention may be a prior sample and then perform time-domain compression or frequency-domain compression, or time-domain compression or frequency-domain compression and resampling, so as to obtain a compression coefficient matrix.
The discarding of some or all of the compression coefficients of the first CSI report may be discarding some or all of the compression coefficients in some layers, or may be discarding some or all of the compression coefficients in all layers, and the number of compression coefficients discarded in each layer may be the same or different.
It should be noted that, in the embodiment of the present invention, discarding may be understood as not reporting, that is, not transmitting, that is, step 201 may be understood as not reporting, for example, reporting information corresponding to part or all of compression coefficients of the first CSI report: quantized values of the compression coefficients. And discarding the compression coefficient may be discarding at least one of the amplitude and phase angle in the compression coefficient, and the discarded content may be different for different compression coefficients.
In addition, the discarding may be performed after the calculation of the first CSI report is completed, or the discarding may be performed before the calculation of the first CSI report. For example: the terminal can calculate the first CSI report completely, and determine to discard the compression coefficients according to the allocated uplink channel resources during transmission, namely bits corresponding to the compression coefficients in the first CSI report are not transmitted; or the terminal may not calculate and then transmit some compression coefficients in the first CSI report according to the allocated uplink channel resource size when calculating the first CSI report.
It should be noted that the first CSI report is not limited to one CSI report, but may represent one type of CSI report, for example: compressed CSI report of Type II. And may be discarded in the same manner for any first CSI report, except that the discarded content of each first CSI report may be the same or different. In addition, the compression coefficients of the first CSI report belong to a second Part (Part 2) of the first CSI report, such that discarding the content of Part 2 of the first CSI report comprises discarding the compression coefficients.
In addition, when the CSI report to be fed back includes a plurality of first CSI reports (for example, a plurality of aperiodic CSI reports triggered at one time), each first CSI report is discarded according to the discarding method provided by the embodiment of the present invention until a set condition is met, that is, the uplink resource can accommodate the CSI report to be fed back after the discarding process.
In the embodiment of the invention, part or all of the compression coefficient of the first CSI report can be discarded through the steps, so that the discarded CSI report is transmitted under the condition that the allocated uplink resource cannot accommodate the CSI report to be fed back, and the feedback of the CSI report is realized.
As an optional implementation manner, discarding some or all compression coefficients of the first CSI report includes:
and discarding the compression coefficient step by step for the first CSI report until the uplink resource can accommodate the CSI report to be fed back after discarding.
The progressive discarding may be discarding a portion of the compression coefficients at a time, for example: one or more rows of compression coefficients in a certain layer are discarded at a time, or one or more rows of compression coefficients in all layers are discarded at a time, or one or more columns of compression coefficients in a certain layer are discarded at a time, or one or more columns of compression coefficients in all layers are discarded at a time.
The uplink resource may be a physical layer uplink shared channel (Physical uplink shared channel, PUSCH) resource or a physical layer downlink control channel (Physical uplink control channel, PUCCH) resource. For example: when the payload capacity of the allocated PUSCH or PUCCH resource for transmitting CSI report can transmit CSI report information can not transmit the entire content of the CSI report to be fed back, and when determining that the current CSI report to be discarded is the first CSI report according to the sequence in the CSI report to be fed back, the compression coefficient of the first CSI report can be discarded in the discarding manner and not reported to the network device, and the uplink resource can accommodate the CSI report to be fed back after the discarding process, even discard the entire compression coefficient of the first CSI report. The uplink resource can accommodate the CSI report to be fed back after the discard process may be that the CSI report to be fed back after the discard process can meet a set condition, where the condition may be defined in a protocol, or the network device negotiates with the terminal in advance, and the like, which is not limited.
In this embodiment, the dropping is performed step by step until the uplink resource can accommodate the CSI report to be fed back after the dropping process, so that the dropping can be stopped in time when the uplink resource can accommodate the CSI report to be fed back after the dropping process, so that the uplink resource can feed back as much CSI information as possible, and the feedback performance of the CSI report can be further improved.
In the embodiment of the present invention, the number of layers of the first CSI report may be greater than or equal to 1, and the progressive dropping of the compression coefficient may include the following multiple implementation manners:
according to the first implementation mode, discarding is performed for a times according to the first priority order of the space beam vectors, wherein compression coefficients corresponding to the first B space beam vectors of the current priority order in all layers are discarded each time, A and B are integers which are larger than or equal to 1, and A multiplied by B is smaller than or equal to the number of the space beam vectors in each layer.
It should be noted that, in the embodiment of the present invention, the current priority of the compression coefficient in the first CSI report changes every time the first CSI report is discarded, that is, the priority in the first CSI report is updated in real time. For example: before the first discarding, the spatial beam vector 1 has the highest priority and the spatial beam vector 2 has the second highest priority, so that the compression coefficient corresponding to one spatial beam vector with the highest priority in all layers is discarded for the first time, that is, the compression coefficient corresponding to the spatial beam vector 1 in all layers is discarded, after the first discarding, before the second discarding, the spatial beam vector 2 becomes the highest priority, because the compression coefficient corresponding to the spatial beam vector 1 is already discarded at this time, so that the compression coefficient corresponding to the spatial beam vector 2 in all layers is discarded for the second time under the condition that B is equal to 1.
In addition, the foregoing discarding of the compression coefficients corresponding to the first B spatial beam vectors of the current priority order in all layers at a time may be discarding of the compression coefficients corresponding to the first B spatial beam vectors of the current priority order in all layers at the same time. For example: before discarding for the first time, the spatial beam vector 1 in all layers has the highest priority, the spatial beam vector 2 has the second highest priority, and if B is equal to 2, the compression coefficients corresponding to the spatial beam vector 1 and the spatial beam vector 2 in all layers are discarded for the first time.
The first priority may be a spatial beam vector priority determined from a smaller maximum value or an average value of the magnitudes of the compression coefficients corresponding to the spatial beam vectors in the layer, that is, a higher priority of the spatial beam vector with a smaller maximum value or average value of the magnitudes of the corresponding compression coefficients. Therefore, the compression coefficient with smaller maximum amplitude or average amplitude can be discarded preferentially, the compression coefficient with larger maximum amplitude or average amplitude is ensured to be transmitted, and important information is reserved so that the information fed back by the transmitted CSI report is more accurate.
Alternatively, the first priority may be a spatial beam vector priority determined from small to large according to the magnitude of the wideband combining coefficient corresponding to the spatial beam vector in the layer, that is, the smaller the magnitude of the corresponding wideband combining coefficient, the higher the priority of the spatial beam vector. Therefore, the compression coefficient corresponding to the space beam vector with smaller amplitude of the wideband combination coefficient can be discarded preferentially, the compression coefficient corresponding to the space beam vector with larger amplitude of the wideband combination coefficient is ensured to be transmitted, and important information is reserved so that the information fed back by the transmitted CSI report is more accurate. The wideband combination coefficient corresponding to the spatial beam vector may be a wideband combination coefficient in the bandwidth information corresponding to the spatial beam vector.
And in the second implementation manner, discarding is performed for C times according to the second priority order of the compression vectors, wherein the compression coefficients corresponding to the first D compression vectors of the current priority order in all layers are discarded each time, C and D are integers greater than or equal to 1, and c×d is less than or equal to the number of compression vectors in each layer.
Similarly, the current priority of the compression coefficients in the first CSI report changes every time the first CSI report is discarded, that is, the priority in the first CSI report is updated in real time. For example: before discarding the first time, the priority of the compression vector 1 is highest, and the priority of the compression vector 2 is second highest, then the compression coefficient corresponding to one compression vector with the highest priority in all layers is discarded for the first time, that is, the compression coefficient corresponding to the compression vector 1 in all layers is discarded, after discarding the first time, before discarding the second time, the compression vector 2 becomes the priority highest, because the compression coefficient corresponding to the compression vector 1 is already discarded at this time, so that in the case that D is equal to 1, the compression coefficient corresponding to the discarded compression vector 2 in all layers is discarded for the second time.
In addition, the foregoing discarding of the compression coefficients corresponding to the D compression vectors before the current priority in all layers may be discarding of the compression coefficients corresponding to the D compression vectors before the current priority in all layers at the same time. For example: before discarding for the first time, the priority of all intra-layer compression vectors 1 is highest, the priority of compression vectors 2 is second highest, and if D is equal to 2, the compression coefficients corresponding to all intra-layer compression vectors 1 and compression vectors 2 are discarded for the first time.
Optionally, the second priority is a priority of the compression vectors determined from small to large according to the maximum value or average value of the magnitudes of the compression coefficients corresponding to the compression vectors corresponding to the spatial beam vectors in the layer, that is, the smaller the maximum value or average value of the magnitudes of the corresponding compression coefficients is, the higher the priority of the compression vectors. Therefore, the compression coefficient with smaller maximum amplitude or average amplitude can be discarded preferentially, the compression coefficient with larger maximum amplitude or average amplitude is ensured to be transmitted, and important information is reserved so that the information fed back by the transmitted CSI report is more accurate.
And in the third implementation mode, determining a target layer which is discarded currently and preferentially according to the third priority sequence of the sequence numbers of the layers, and discarding the compression coefficients step by step in the target layer.
Note that, the target layer may be any layer in the first CSI report, and the discarding is performed according to the third priority order of the sequence numbers of the layers, so that each time, one layer is the discarding object, but the discarding may be performed one or more times in the layer. Taking two layers as an example, according to the third priority order, the priority order of the layer 2 is higher than that of the layer 1, and for the first CSI report, the layer 2 is preferentially selected as the target layer, and after the layer 2 is discarded, if the set condition is not met, the layer 1 is selected as the current target layer. Of course, after the layer 1 is discarded, if the set condition is not met, the layer 2 may be selected continuously for discarding, that is, the discarding may be performed circularly between the layers, and the number of compression coefficients discarded in each discarding process may be the same or different, according to the third priority, the number of times F of discarding the layer with higher priority is greater than or equal to the number of times F of discarding the layer with lower priority, and/or the number K of space beam vectors of compression coefficients corresponding to each discarded space beam vector of the layer with higher priority is greater than or equal to the number K of space beam vectors of compression coefficients corresponding to each discarded space beam vector of the layer with lower priority. For example: the compression coefficients corresponding to k=2 spatial beam vectors may be discarded every time layer 2 is discarded, and the compression coefficients corresponding to k=1 spatial beam vectors may be discarded every time layer 1 is discarded.
Preferably, the third priority may be a priority discarding order determined according to the sequence number of the layer from large to small, for example, the higher the priority of the layer with a larger sequence number, so that the CSI information of the layer with a smaller sequence number may be ensured, so that the information fed back by the transmitted CSI report is more accurate, because the CSI information of the layer with a smaller sequence number is often more important than the CSI information of the layer with a larger sequence number.
The layer-by-layer discarding can be realized through the third priority sequence, and the compression coefficients are discarded step by step in the layer, so that the CSI information reserved by the fed-back first CSI report can be ensured to be more comprehensive.
Optionally, the step-by-step discarding of the compression coefficient is performed in the target layer, including at least one of:
f times of discarding are carried out in the target layer according to the fourth priority order of the space beam vectors in the target layer, wherein the compression coefficients corresponding to K space beam vectors in the front of the current priority order in the target layer are discarded each time, F and K are positive integers corresponding to the target layer, and F multiplied by K is smaller than or equal to the number of the space beam vectors in the target layer;
performing T times of discarding in the target layer according to the fifth priority order of the compression vectors in the target layer, wherein each time the compression coefficients corresponding to the H compression vectors before the current priority order in the target layer are discarded, T and H are positive integers corresponding to the target layer, and T multiplied by H is smaller than or equal to the number of compression vectors corresponding to the space beam vectors in the target layer;
Discarding all current compression coefficients of the target layer.
The fourth priority may be a spatial beam vector priority determined from small to large according to a maximum value or an average value of magnitudes of compression coefficients corresponding to spatial beam vectors in the target layer; alternatively, the fourth priority may be a spatial beam vector priority determined from small to large according to the magnitude of the wideband combination coefficient corresponding to the spatial beam vector in the target layer.
The fifth priority may be a compression vector priority determined from a small value to a large value according to a maximum value or an average value of magnitudes of compression coefficients corresponding to compression vectors corresponding to the spatial beam vectors in the target layer. For example: the corresponding compression coefficients are discarded step by step in order of magnitude of the compression coefficients of the compression vector from small to large (e.g., at least one of magnitude or phase angle is discarded). Wherein the compression coefficient matrixCorresponding to a compressed vector, meaning that a certain column is discarded from transmission, and the network device may set the corresponding coefficient to 0 upon recovery.
It should be noted that, the foregoing F and K are positive integers corresponding to the target layer, and it is understood that the values of F and K corresponding to different layers may be different or the same, that is, the number of times of discarding for different layers may be the same or different, and the number of compression coefficients discarded each time may be the same or different. For example: when the target layer is layer 1, F and K are F1 and K1 respectively, and T and H are T1 and H1 respectively; when the target layer is layer 2, then F and K are F2 and K2, respectively, and T and H are T2 and H2, respectively.
Further, the number of times discarded in the first target layer in the first CSI report is greater than or equal to the number of times discarded in the second target layer; and/or
The number of compression coefficients discarded each time in the first target layer is greater than or equal to the number of compression coefficients discarded each time in the second target layer;
wherein the first target layer has a higher priority in the third order of priority than the second target layer.
For example: according to the third priority, the priority of layer 2 is higher than that of layer 1, then F2 of layer 2 is greater than or equal to F1 of layer 1, and K2 of layer 2 is greater than or equal to K1 of layer 1.
This makes it possible to realize that the compression coefficient of the layer priority discarding with a lower priority is smaller than that of the layer priority discarding with a higher priority. Assuming f1=f2, if the set condition is not satisfied, layer 2 with high priority loses compression coefficients corresponding to K2 space beam vectors first, layer 1 with next high priority loses compression coefficients corresponding to K1 space beam vectors, and so on, wherein K2 is greater than or equal to K1, so that the compression coefficients of the important layers can be reported as much as possible, and the feedback performance of the CSI report can be further improved.
In the above embodiment, the step-by-step discarding of the compression coefficients corresponding to the spatial beam vectors according to the fourth priority order may be implemented. For example: the compression coefficients corresponding to a certain spatial beam vector are discarded step by step in order of magnitude of the compression coefficients of the spatial beam vector from small to large (e.g., at least one of magnitude or phase angle is discarded). Wherein the compression coefficient matrixCorresponds to a spatial beam vector, meaning that a row is discarded from transmission. Compression coefficient matrixThe following may be possible:
the amplitude of the compression coefficient of the spatial beam vector may be the maximum value or the average value of the amplitude of the compression coefficient (a certain row in the compression matrix) corresponding to one spatial beam vector, or the amplitude value of the wideband combination coefficient of the spatial beam vector.
For example, if l=4, assuming that the spatial beam vector 2,1,3,5,4,6,7,8 is arranged in the order of the magnitudes of the compression coefficients of the spatial beam vectors from large to small, the compression coefficient corresponding to the spatial beam vector 8 is discarded first; the corresponding compression coefficients of the spatial beam vector 7 are discarded again and so on. I.e. the compression coefficient matrix discards line 8 first, then line 7, and so on.
Further, if the compression coefficient of the specific spatial beam vector is discarded, the compression vector information corresponding to the combination coefficient of the specific spatial beam vector may be discarded, where the combination coefficient of the specific spatial beam vector corresponds to the independently selected compression vector.
For example: if the combined coefficients of each spatial beam vector correspond to an independently selected compressed vector matrix, then the compressed coefficients corresponding to a certain spatial beam vector may be discarded, while the corresponding compressed vector information, such as the selected compressed vector identification, may also be discarded. Thereby ensuring that more useful CSI information is fed back on the allocated uplink resources.
When the network is set up to reconstruct the precoding matrix on the side, the discarded compression coefficient may be set to 0 or the precoding matrix may be reconstructed using the transmitted partial spatial beam vector, partial compression coefficient and compression vector.
Note that, the current total compression coefficient may be all the compression coefficients when the target layer does not discard, or the current total compression coefficient may be the compression coefficients remaining in the target layer after discarding according to the fourth priority order or the fifth priority order. The discarding the current all compression coefficients of the target layer may be sequentially discarding the current all compression coefficients of some or all layers according to the third priority order of the sequence numbers of the layers.
For example: the corresponding compression coefficient matrix is discarded step by step in the order of the layer sequence number (for example, corresponding to the order number), and the rank in the CSI report is determined by the rank number of the CSI actually fed back. For example: the first determined rank is 2, and the compression coefficient matrix corresponding to the layer 2 (r=2) is discarded firstly when discardingCompression coefficient matrix corresponding to only transmission layer 1 (r=1)>Still further, rank 1 may be indicated in the CSI report. That is, in the embodiment of the present invention, the rank corresponding to the compression coefficient matrix remaining after discarding may be indicated in the first CSI report, for example: after some compression coefficient matrix is discarded, the first CSI report does not include the rank corresponding to the compression coefficient matrix.
It should be noted that, the foregoing progressive dropping of the compression coefficients in the target layer includes at least one of the foregoing three modes, and it is understood that one of the foregoing three dropping modes (i.e., dropping according to the fourth priority, dropping according to the fifth priority, and dropping all the current compression coefficients of the target layer) is preferentially selected for dropping, if dropping is performed to a certain extent (e.g., at least L is reserved) 0 <2L lines or at least preserve X 0 <X columns, or rows or columns that retain compression factor magnitudes less than some set value) still do not meet the target condition and are discarded in another manner until the target condition is met. Or alternatively, several ways are used, such as the order of discarding one row, discarding one column, discarding one row, discarding one column. For another example, according to the third priority, the rows or columns of the higher priority layer are discarded first, and then the rows or columns of the lower priority layer are discarded.
The method for discarding the CSI report provided by the embodiment of the invention can discard the CSI report, and further provides a CSI report discarding rule for enhancing or compressing the CSI report based on the Type II.
Referring to fig. 3, fig. 3 is a block diagram of a terminal according to an embodiment of the present invention, and a terminal 300 shown in fig. 3 includes:
and the discarding module 301 is configured to discard part or all of the compression coefficients of the first CSI report if it is determined that the CSI report to be discarded is the first CSI report according to the order in the CSI reports to be fed back.
Optionally, discarding some or all compression coefficients of the first CSI report includes:
and discarding the compression coefficient step by step for the first CSI report until the uplink resource can accommodate the CSI report to be fed back after discarding.
Optionally, the number of layers of the first CSI report is greater than or equal to 1, and the compression coefficient is discarded step by step, including:
according to the first priority order of the space beam vectors, carrying out A times of discarding, wherein each time of discarding compression coefficients corresponding to B space beam vectors in front of the current priority order in all layers, A and B are integers which are larger than or equal to 1, and A multiplied by B is smaller than or equal to the number of the space beam vectors in each layer; or alternatively
C times of discarding are carried out according to the second priority order of the compression vectors, wherein the compression coefficients corresponding to the D compression vectors before the current priority order in all layers are discarded each time, C and D are integers which are larger than or equal to 1, and C multiplied by D is smaller than or equal to the number of the compression vectors in each layer; or alternatively
And determining a target layer which is discarded currently and preferentially according to the third priority sequence of the sequence numbers of the layers, and discarding the compression coefficients step by step in the target layer.
Optionally, the step-by-step discarding of the compression coefficient is performed in the target layer, including at least one of:
f times of discarding are carried out in the target layer according to the fourth priority order of the space beam vectors in the target layer, wherein the compression coefficients corresponding to K space beam vectors in the front of the current priority order in the target layer are discarded each time, F and K are positive integers corresponding to the target layer, and F multiplied by K is smaller than or equal to the number of the space beam vectors in the target layer;
performing T times of discarding in the target layer according to the fifth priority order of the compression vectors in the target layer, wherein each time the compression coefficients corresponding to the H compression vectors before the current priority order in the target layer are discarded, T and H are positive integers corresponding to the target layer, and T multiplied by H is smaller than or equal to the number of compression vectors corresponding to the space beam vectors in the target layer;
Discarding all current compression coefficients of the target layer.
Optionally, the number of times discarded in the first target layer in the first CSI report is greater than or equal to the number of times discarded in the second target layer; and/or
The number of compression coefficients discarded each time in the first target layer is greater than or equal to the number of compression coefficients discarded each time in the second target layer;
wherein the first target layer has a higher priority in the third order of priority than the second target layer.
Optionally, the first priority is a spatial beam vector priority determined from small to large according to the maximum value or average value of the amplitude of the compression coefficient corresponding to the spatial beam vector in the layer; or the first priority order is a spatial beam vector priority order determined from small to large according to the amplitude of the broadband combination coefficient corresponding to the spatial beam vector in the layer;
and/or the number of the groups of groups,
the second priority order is a compression vector priority order determined from small to large according to the maximum value or average value of the amplitude of the compression coefficient corresponding to the compression vector corresponding to the space beam vector in the layer.
Optionally, the fourth priority is a spatial beam vector priority determined from small to large according to a maximum value or an average value of magnitudes of compression coefficients corresponding to spatial beam vectors in the target layer; or the fourth priority is a spatial beam vector priority determined from small to large according to the amplitude of the wideband combination coefficient corresponding to the spatial beam vector in the target layer;
And/or the number of the groups of groups,
the fifth priority is a compression vector priority determined from the maximum value or the average value of the magnitudes of the compression coefficients corresponding to the compression vectors corresponding to the space beam vectors in the target layer from small to large.
Optionally, if the compression coefficient of the specific spatial beam vector is discarded, compressed vector information corresponding to the combination coefficient of the specific spatial beam vector is also discarded, where the combination coefficient of the specific spatial beam vector corresponds to the independently selected compressed vector.
Optionally, the third priority order is a priority discarding order determined according to the sequence number of the layer from big to small.
The terminal provided by the embodiment of the invention can realize each process realized by the terminal in the embodiment of the method of fig. 2, and in order to avoid repetition, the description is omitted here, and the feedback overhead of the CSI codebook can be reduced.
Figure 4 is a schematic diagram of a hardware architecture of a terminal implementing various embodiments of the present invention,
the terminal 400 includes, but is not limited to: radio frequency unit 401, network module 402, audio output unit 403, input unit 404, sensor 405, display unit 406, user input unit 407, interface unit 408, memory 409, processor 410, and power source 411. Those skilled in the art will appreciate that the terminal structure shown in fig. 4 is not limiting of the terminal and that the terminal may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. In the embodiment of the invention, the terminal comprises, 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.
And the processor 410 is configured to discard some or all compression coefficients of the first CSI report if it is determined that the CSI report to be discarded is the first CSI report according to the order in the CSI reports to be fed back.
Optionally, discarding some or all compression coefficients of the first CSI report includes:
and discarding the compression coefficient step by step for the first CSI report until the uplink resource can accommodate the CSI report to be fed back after discarding.
Optionally, the number of layers of the first CSI report is greater than or equal to 1, and the compression coefficient is discarded step by step, including:
according to the first priority order of the space beam vectors, carrying out A times of discarding, wherein each time of discarding compression coefficients corresponding to B space beam vectors in front of the current priority order in all layers, A and B are integers which are larger than or equal to 1, and A multiplied by B is smaller than or equal to the number of the space beam vectors in each layer; or alternatively
C times of discarding are carried out according to the second priority order of the compression vectors, wherein the compression coefficients corresponding to the D compression vectors before the current priority order in all layers are discarded each time, C and D are integers which are larger than or equal to 1, and C multiplied by D is smaller than or equal to the number of the compression vectors in each layer; or alternatively
And determining a target layer which is discarded currently and preferentially according to the third priority sequence of the sequence numbers of the layers, and discarding the compression coefficients step by step in the target layer.
Optionally, the step-by-step discarding of the compression coefficient is performed in the target layer, including at least one of:
f times of discarding are carried out in the target layer according to the fourth priority order of the space beam vectors in the target layer, wherein the compression coefficients corresponding to K space beam vectors in the front of the current priority order in the target layer are discarded each time, F and K are positive integers corresponding to the target layer, and F multiplied by K is smaller than or equal to the number of the space beam vectors in the target layer;
performing T times of discarding in the target layer according to the fifth priority order of the compression vectors in the target layer, wherein each time the compression coefficients corresponding to the H compression vectors before the current priority order in the target layer are discarded, T and H are positive integers corresponding to the target layer, and T multiplied by H is smaller than or equal to the number of compression vectors corresponding to the space beam vectors in the target layer;
discarding all current compression coefficients of the target layer.
Optionally, the number of times discarded in the first target layer in the first CSI report is greater than or equal to the number of times discarded in the second target layer; and/or
The number of compression coefficients discarded each time in the first target layer is greater than or equal to the number of compression coefficients discarded each time in the second target layer;
wherein the first target layer has a higher priority in the third order of priority than the second target layer.
Optionally, the first priority is a spatial beam vector priority determined from small to large according to the maximum value or average value of the amplitude of the compression coefficient corresponding to the spatial beam vector in the layer; or the first priority order is a spatial beam vector priority order determined from small to large according to the amplitude of the broadband combination coefficient corresponding to the spatial beam vector in the layer;
and/or the number of the groups of groups,
the second priority order is a compression vector priority order determined from small to large according to the maximum value or average value of the amplitude of the compression coefficient corresponding to the compression vector corresponding to the space beam vector in the layer.
Optionally, the fourth priority is a spatial beam vector priority determined from small to large according to a maximum value or an average value of magnitudes of compression coefficients corresponding to spatial beam vectors in the target layer; or the fourth priority is a spatial beam vector priority determined from small to large according to the amplitude of the wideband combination coefficient corresponding to the spatial beam vector in the target layer;
And/or the number of the groups of groups,
the fifth priority is a compression vector priority determined from the maximum value or the average value of the magnitudes of the compression coefficients corresponding to the compression vectors corresponding to the space beam vectors in the target layer from small to large.
Optionally, if the compression coefficient of the specific spatial beam vector is discarded, compressed vector information corresponding to the combination coefficient of the specific spatial beam vector is also discarded, where the combination coefficient of the specific spatial beam vector corresponds to the independently selected compressed vector.
Optionally, the third priority order is a priority discarding order determined according to the sequence number of the layer from big to small.
The terminal can improve the feedback performance of the CSI report.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 401 may be used for receiving and transmitting signals during the process of receiving and transmitting information or communication, specifically, receiving downlink data from a base station and then processing the received downlink data by the processor 410; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 401 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 401 may also communicate with networks and other devices through a wireless communication system.
The terminal provides wireless broadband internet access to the user through the network module 402, such as helping the user to send and receive e-mail, browse web pages, access streaming media, etc.
The audio output unit 403 may convert audio data received by the radio frequency unit 401 or the network module 402 or stored in the memory 409 into an audio signal and output as sound. Also, the audio output unit 403 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the terminal 400. The audio output unit 403 includes a speaker, a buzzer, a receiver, and the like.
The input unit 404 is used to receive an audio or video signal. The input unit 404 may include a graphics processor (Graphics Processing Unit, GPU) 4041 and a microphone 4042, the graphics processor 4041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 406. The image frames processed by the graphics processor 4041 may be stored in memory 409 (or other storage medium) or transmitted via the radio frequency unit 401 or the network module 402. The microphone 4042 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 that can be transmitted to the mobile communication base station via the radio frequency unit 401 in the case of a telephone call mode.
The terminal 400 also includes at least one sensor 405, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 4061 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 4061 and/or the backlight when the terminal 400 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when the accelerometer sensor is stationary, and can be used for recognizing the terminal gesture (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; the sensor 405 may further 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 are not described herein.
The display unit 406 is used to display information input by a user or information provided to the user. The display unit 406 may include a display panel 4061, and the display panel 4061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 407 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 407 includes a touch panel 4071 and other input devices 4072. The touch panel 4071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 4071 or thereabout using any suitable object or accessory such as a finger, stylus, etc.). The touch panel 4071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth 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 it into touch point coordinates, and sends the touch point coordinates to the processor 410, and receives and executes commands sent from the processor 410. In addition, the touch panel 4071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 407 may include other input devices 4072 in addition to the touch panel 4071. In particular, other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
Further, the touch panel 4071 may be overlaid on the display panel 4061, and when the touch panel 4071 detects a touch operation thereon or thereabout, the touch operation is transferred to the processor 410 to determine the type of touch event, and then the processor 410 provides a corresponding visual output on the display panel 4061 according to the type of touch event. Although in fig. 4, the touch panel 4071 and the display panel 4061 are two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 4071 may be integrated with the display panel 4061 to implement the input and output functions of the terminal, which is not limited herein.
The interface unit 408 is an interface through which an external device is connected to the terminal 400. For example, the external devices may include a wired or wireless headset port, an external power (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 408 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 400 or may be used to transmit data between the terminal 400 and an external device.
Memory 409 may be used to store software programs as well as various data. The memory 409 may mainly include a storage program area that may store an operating system, application programs required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, memory 409 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, and performs various functions of the terminal and processes data by running or executing software programs and/or modules stored in the memory 409 and calling data stored in the memory 409, 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 that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.
The terminal 400 may further include a power source 411 (e.g., a battery) for supplying power to the respective components, and preferably, the power source 411 may be logically connected to the processor 410 through a power management system, so as to perform functions of managing charging, discharging, and power consumption management through the power management system.
In addition, the terminal 400 includes some functional modules, which are not shown, and will not be described herein.
Preferably, the embodiment of the present invention further provides a terminal, which includes a processor 410, a memory 409, and a computer program stored in the memory 409 and capable of running on the processor 410, where the computer program when executed by the processor 410 implements each process of the foregoing CSI report discarding method embodiment, and the same technical effects can be achieved, so that repetition is avoided and redundant description is omitted herein.
The embodiment of the invention also provides a computer readable storage medium, and a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the process of the discarding method embodiment of the CSI report provided by the embodiment of the invention is realized, and the same technical effect can be achieved, so that repetition is avoided, and the detailed description is omitted. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or 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 phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (10)
1. A method for discarding a CSI report, applied to a terminal, comprising:
discarding part or all compression coefficients of a first CSI report if the current CSI report to be discarded is determined to be the first CSI report according to the sequence in the CSI report to be fed back;
wherein discarding some or all compression coefficients of the first CSI report includes:
discarding the compression coefficient step by step for the first CSI report until the uplink resource can accommodate the discarded CSI report to be fed back;
the number of layers of the first CSI report is greater than or equal to 1, and the compression coefficient is discarded step by step, including:
according to the first priority order of the space beam vectors, carrying out A times of discarding, wherein each time of discarding compression coefficients corresponding to B space beam vectors in front of the current priority order in all layers, A and B are integers which are larger than or equal to 1, and A multiplied by B is smaller than or equal to the number of the space beam vectors in each layer; or alternatively
C times of discarding are carried out according to the second priority order of the compression vectors, wherein the compression coefficients corresponding to the D compression vectors before the current priority order in all layers are discarded each time, C and D are integers which are larger than or equal to 1, and C multiplied by D is smaller than or equal to the number of the compression vectors in each layer; or alternatively
And determining a target layer which is discarded currently and preferentially according to the third priority sequence of the sequence numbers of the layers, and discarding the compression coefficients step by step in the target layer.
2. The method of claim 1, wherein progressive dropping of compression coefficients within the target layer comprises at least one of:
f times of discarding are carried out in the target layer according to the fourth priority order of the space beam vectors in the target layer, wherein the compression coefficients corresponding to K space beam vectors in the front of the current priority order in the target layer are discarded each time, F and K are positive integers corresponding to the target layer, and F multiplied by K is smaller than or equal to the number of the space beam vectors in the target layer;
performing T times of discarding in the target layer according to the fifth priority order of the compression vectors in the target layer, wherein each time the compression coefficients corresponding to the H compression vectors before the current priority order in the target layer are discarded, T and H are positive integers corresponding to the target layer, and T multiplied by H is smaller than or equal to the number of compression vectors corresponding to the space beam vectors in the target layer;
Discarding all current compression coefficients of the target layer.
3. The method of claim 2, wherein a number of drops in a first target layer in the first CSI report is greater than or equal to a number of drops in a second target layer; and/or
The number of compression coefficients discarded each time in the first target layer is greater than or equal to the number of compression coefficients discarded each time in the second target layer;
wherein the first target layer has a higher priority in the third order of priority than the second target layer.
4. The method of claim 1, wherein the first order of preference is a spatial beam vector order determined from small to large according to a magnitude maximum or average of compression coefficients corresponding to spatial beam vectors within a layer; or the first priority order is a spatial beam vector priority order determined from small to large according to the amplitude of the broadband combination coefficient corresponding to the spatial beam vector in the layer;
and/or the number of the groups of groups,
the second priority order is a compression vector priority order determined from small to large according to the maximum value or average value of the amplitude of the compression coefficient corresponding to the compression vector corresponding to the space beam vector in the layer.
5. The method of claim 2, wherein the fourth order of preference is a spatial beam vector order determined from small to large according to a maximum or average value of magnitudes of compression coefficients corresponding to spatial beam vectors within the target layer; or the fourth priority is a spatial beam vector priority determined from small to large according to the amplitude of the wideband combination coefficient corresponding to the spatial beam vector in the target layer;
and/or the number of the groups of groups,
the fifth priority is a compression vector priority determined from the maximum value or the average value of the magnitudes of the compression coefficients corresponding to the compression vectors corresponding to the space beam vectors in the target layer from small to large.
6. The method according to any one of claims 1 to 5, wherein if the compression coefficient of a specific spatial beam vector is discarded, the compression vector information corresponding to the combination coefficient of the specific spatial beam vector is also discarded, wherein the combination coefficient of the specific spatial beam vector corresponds to an independently selected compression vector.
7. The method according to any one of claims 1 to 5, wherein the third priority order is a priority discard order determined from a large to a small sequence number of a layer.
8. A terminal, comprising:
the discarding module is used for discarding part or all of the compression coefficients of the first CSI report if the current CSI report to be discarded is determined to be the first CSI report according to the sequence in the CSI report to be fed back;
wherein discarding some or all compression coefficients of the first CSI report includes:
discarding the compression coefficient step by step for the first CSI report until the uplink resource can accommodate the discarded CSI report to be fed back;
the number of layers of the first CSI report is greater than or equal to 1, and the compression coefficient is discarded step by step, including:
according to the first priority order of the space beam vectors, carrying out A times of discarding, wherein each time of discarding compression coefficients corresponding to B space beam vectors in front of the current priority order in all layers, A and B are integers which are larger than or equal to 1, and A multiplied by B is smaller than or equal to the number of the space beam vectors in each layer; or alternatively
C times of discarding are carried out according to the second priority order of the compression vectors, wherein the compression coefficients corresponding to the D compression vectors before the current priority order in all layers are discarded each time, C and D are integers which are larger than or equal to 1, and C multiplied by D is smaller than or equal to the number of the compression vectors in each layer; or alternatively
And determining a target layer which is discarded currently and preferentially according to the third priority sequence of the sequence numbers of the layers, and discarding the compression coefficients step by step in the target layer.
9. A terminal, comprising: a memory, a processor and a program stored on the memory and executable on the processor, which when executed by the processor, implements the steps in the CSI report discarding method according to any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, implements the steps of the CSI report discarding method according to any of claims 1 to 7.
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