CN111836309B

CN111836309B - Transmission method, terminal and network side equipment for Channel State Information (CSI) report

Info

Publication number: CN111836309B
Application number: CN201910786084.9A
Authority: CN
Inventors: 施源; 塔玛拉卡·拉盖施; 宋扬
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2023-10-24
Anticipated expiration: 2039-08-23
Also published as: CN111836309A

Abstract

The invention discloses a transmission method, a terminal and network side equipment of Channel State Information (CSI) reports, and belongs to the technical field of communication. The transmission method of the CSI report comprises the following steps: grouping bit maps indicating quantization coefficients and the quantization coefficients according to grouping lengths to obtain a plurality of information groups; according to the priority information of the information group, discarding at least one of the following information in the CSI report: the public part and the plurality of information groups, wherein the bit number of the CSI report after discarding is equal to the bit number which can be carried by the uplink channel resource used for sending the CSI report; and sending the CSI report after the discarding process on the uplink channel resource. According to the technical scheme, the target code rate can be kept unchanged, and further the CSI feedback performance is guaranteed.

Description

Transmission method, terminal and network side equipment for Channel State Information (CSI) report

Technical Field

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

Background

In a wireless communication system, feedback of channel state information (Channel State Information, CSI) is enhanced, and CSI feedback is in two ways, type one and type two. Wherein type two employs spatial orthogonal baseline combining (Linear Combination, LC) to approximate CSI, such as eigenvalue vectors of the channel. Specifically, L orthogonal beams are selected from the oversampled two-dimensional discrete fourier transform (2-Dimentional Discrete Fourier Transform,2D DFT) beams, the combination coefficients (complex numbers) of the L orthogonal beams corresponding to each layer (or each eigenvalue vector) are calculated, and the amplitude values, phase values, and/or phase angle values thereof are quantized. Where L is configured for the network side device, the selection of the orthogonal beam is based on bandwidth and is applicable to all ranks (rank), i.e. to all layers (layers). The amplitude quantization of the combined coefficients may be configured as bandwidth quantization or bandwidth quantization and subband quantization, wherein the bandwidth quantization is indicated when the subband amplitude (subband) is false (false) and the bandwidth quantization and subband quantization are indicated when the subband amplitude is true (wire). Phase angle quantization of the combined coefficients is done on each subband.

Further, CSI reports corresponding to CSI feedback type two may be written as a matrix with codebook writing of 2 lxr at frequency domain granularity m.

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

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

Specifically, the CSI report of type two includes a first part (part 1) and a second part (part 2), wherein part1 has a fixed payload size, specifically including: rank Indication (RI), channel quality Indication (Channel Quality Indication, CQI), and a number of non-zero amplitude combining coefficients per layer bandwidth. part2 includes a precoding matrix indicator (Precoding Matrix Indicator, PMI). Part1 and part2 in the CSI report are respectively encoded, and the load size of part2 is determined according to the information of part 1.

When the CSI report is transmitted on the physical uplink shared channel (Physical Uplink Share Channel, PUSCH), since the network side device cannot predict the size of the CSI report, especially the payload size of part2 in the CSI report, the PUSCH resource allocated by the network side device may not accommodate the entire content of the CSI report, and at this time, the terminal may discard the information of the subband CSI, so as to ensure that the CSI report can be placed in the uplink resource of the corresponding network configuration. However, after the terminal side discards the CSI information, the number of bits of the CSI report to be transmitted may be less than the number of bits that can be carried by the uplink channel resource used to send the CSI report, where the number of bits that can be carried is calculated by using the uplink channel resource and the target code rate, in order to ensure that the number of bits of the CSI report to be transmitted is consistent with the number of bits that can be carried, the target code rate needs to be modified, but the network side device cannot learn the modified target code rate, which may cause decoding failure and further cause CSI feedback performance degradation.

Disclosure of Invention

The embodiment of the invention provides a transmission method, a terminal and network side equipment of Channel State Information (CSI) reports, which can ensure that a target code rate is unchanged and further ensure CSI feedback performance.

In a first aspect, an embodiment of the present invention provides a method for transmitting a CSI report, applied to a terminal, including:

grouping bit maps indicating quantized coefficients and the quantized coefficients according to grouping lengths to obtain a plurality of information groups, wherein grouping results of the quantized coefficients are obtained according to grouping results of the bit maps, and the quantized coefficients are quantized coefficients of non-zero coefficients of a compression coefficient matrix;

according to the priority information of the information group, discarding at least one of the following information in the CSI report: the public part and the plurality of information groups, wherein the bit number of the CSI report after discarding is equal to the bit number which can be carried by the uplink channel resource used for sending the CSI report, and the bit number which can be carried by the uplink channel resource used for sending the CSI report is determined according to the code rate configured by a network side and the uplink channel resource allocated for the CSI report;

and sending the CSI report after the discarding process on the uplink channel resource.

In a second aspect, an embodiment of the present invention provides a method for transmitting a CSI report, applied to a network device side, including:

receiving a Channel State Information (CSI) report of a terminal, wherein quantized coefficients of non-zero coefficients of a compression coefficient matrix and bit maps indicating the quantized coefficients in the CSI report are divided into a plurality of information groups;

determining the bit number of a bit map in an information group according to the priority information of the information group, and demodulating the bit map according to the bit number of the bit map;

and determining the bit number of the quantized coefficient according to the demodulated bit map, and demodulating the quantized coefficient according to the bit number of the quantized coefficient.

In a third aspect, an embodiment of the present invention further provides a device for transmitting a CSI report, which is applied to a terminal, and includes:

the grouping module is used for grouping the bit bitmap indicating the quantized coefficients and the quantized coefficients according to the grouping length to obtain a plurality of information groups, wherein the grouping result of the quantized coefficients is obtained according to the grouping result of the bit bitmap, and the quantized coefficients are quantized coefficients of non-zero coefficients of the compressed coefficient matrix;

The discarding module is configured to discard, according to the priority information of the information group, at least one of the following information in the CSI report: the public part and the plurality of information groups, wherein the bit number of the CSI report after discarding is equal to the bit number which can be carried by the uplink channel resource used for sending the CSI report, and the bit number which can be carried by the uplink channel resource used for sending the CSI report is determined according to the code rate configured by a network side and the uplink channel resource allocated for the CSI report;

and a sending module, configured to send the CSI report after the discarding process on the uplink channel resource.

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

a receiving module, configured to receive a CSI report of a terminal, where a quantized coefficient of a non-zero coefficient of a compression coefficient matrix and a bit map indicating the quantized coefficient in the CSI report are divided into a plurality of information groups;

the processing module is used for determining the bit number of the bit map in the information group according to the priority information of the information group and demodulating the bit map according to the bit number of the bit map; and determining the bit number of the quantized coefficient according to the demodulated bit map, and demodulating the quantized coefficient according to the bit number of the quantized coefficient.

In a fifth aspect, an embodiment of the present invention further provides a communication device, where the communication device includes a processor, a memory, and a computer program stored on the memory and running on the processor, where the steps of the transmission method of channel state information CSI reports as described above are implemented when the processor executes the computer program.

In a sixth aspect, embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method of transmitting channel state information CSI reports as described above.

In the above scheme, the bit number of the CSI report after discarding the information is equal to the bit number which can be carried by the uplink channel resource used for sending the CSI report, so that the network side device and the terminal do not need to change the target code rate, the network side device can receive and parse the CSI report according to the priority information of the information group, determine the discarded part of the content of the terminal, and is favorable for the network side device to accurately obtain the channel state and optimize the CSI feedback performance.

Drawings

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

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

fig. 2 is a flow chart illustrating a method for transmitting CSI reports of a terminal according to an embodiment of the present application;

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

FIG. 4 shows a block diagram of a terminal according to an embodiment of the application;

fig. 5 is a flow chart of a method for transmitting CSI reports of a network device according to an embodiment of the present application;

fig. 6 is a schematic block diagram of a network device according to an embodiment of the present application;

fig. 7 shows a block diagram of a network side device according to an embodiment of the present application;

fig. 8-13 are schematic diagrams illustrating discarding information in CSI reports according to embodiments of the present application.

Detailed Description

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

The terms first, second and the like in the description and in the claims, 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 may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. "and/or" in the specification and claims means at least one of the connected objects.

The techniques described herein are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems and may also be used for various wireless communication systems such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement radio technologies such as CDMA2000, universal terrestrial radio access (Universal Terrestrial Radio Access, UTRA), and the like. UTRA includes wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as the global system for mobile communications (Global System for Mobile Communication, GSM). OFDMA systems may implement radio technologies such as ultra mobile broadband (UltraMobile Broadband, UMB), evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, and the like. UTRA and E-UTRA are parts of the universal mobile telecommunications system (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, LTE-a and GSM are described in the literature from an organization named "third generation partnership project" (3rd Generation Partnership Project,3GPP). CDMA2000 and UMB are described in the literature from an organization named "third generation partnership project 2" (3 GPP 2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. However, the following description describes an NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

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

Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a terminal Device or a User Equipment (UE), and the terminal 11 may be a terminal-side Device such as a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA), a mobile internet Device (Mobile Internet Device, MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, which is not limited to a specific type of the terminal 11 in the embodiment of the present invention. The network side device 12 may be a base station or a core network, where 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 (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (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, and the base station is not limited to a specific technical vocabulary, but only uses a base station in an NR system as an example in the embodiment of the present invention, so long as the same technical effect is achieved.

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

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

The communication link in the wireless communication system may include an Uplink for carrying Uplink (UL) transmissions (e.g., from the terminal 11 to the network-side device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from the network-side device 12 to the terminal 11). UL transmissions may also be referred to as reverse link transmissions, while DL transmissions may also be referred to as forward link transmissions. Downlink transmissions may be made using licensed bands, unlicensed bands, or both. Similarly, uplink transmissions may be made using licensed bands, unlicensed bands, or both.

In a wireless communication system, a CSI report of type two includes a first portion (part 1) and a second portion (part 2), wherein part1 has a fixed payload size, and specifically includes: rank Indication (RI), channel quality Indication (Channel Quality Indication, CQI), and a number of non-zero amplitude combining coefficients per layer bandwidth. part2 includes a precoding matrix indicator (Precoding Matrix Indicator, PMI). Part1 and part2 in the CSI report are respectively encoded, and the load size of part2 is determined according to the information of part 1.

The two-level codebook of CSI reports at frequency domain granularity m may be written as:

Wherein N is ₁ 、N ₂ The port numbers of the CSI reference signals (CSI Reference Signal, CSI-RS) in two dimensions are respectively, and R is the rank or the layer number; b' _l C is an orthogonal vector composed of 2D-DFT beam vectors _l,r (m) is the combination coefficient of the first orthogonal beam vector of layer R on the frequency domain granularity m, r=1, 2, …, R, l=1, 2, …,2l, l is the number of orthogonal beams selected. The frequency domain granularity may be a subband or a Resource Block (RB), and the wideband may be divided into M frequency domain resources in units of the frequency domain granularity.

If the combined coefficients of all the sub-bands are cascaded together, a precoding matrix of a layer r on a frequency domain can be obtained, wherein the precoding matrix is a precoding matrix of a certain layer on a broadband (or called frequency domain), that is, the combined coefficients on all the frequency domain granularity are cascaded together, and a precoding matrix of the layer r on the frequency domain can be obtained, and the precoding matrix can be written as a 2L×M matrix and is expressed as follows:

wherein c _l,r (m) is the combining coefficient of the first orthogonal beam vector of layer r at frequency domain granularity m. W (W) _2,r The first line in (b) represents the beam vector b' _l The combined coefficient matrix at all frequency domain granularity is represented as follows:

due to the frequency domain correlation, the coefficient matrices (W _2,r ) _2L×M Frequency domain compression can be further performed; on the other hand, the thin of the time domain channel impulse responseThe sparsity may be a time domain compression, both frequency domain compression and time domain compression being equivalent in some sense.

The compression matrix is: extracting elements in the product of the precoding matrix and the initial vector matrix of the orthogonal base, wherein K is a value smaller than M, and K can be configured by network side equipment, can be agreed by a protocol, or can be autonomously determined by a terminal. For example, using spatial compression of CSI feedback type two, for W _2,r Transform W ₃ I.e.From W ₃ Is->

Let W be ₃ The inverse discrete fourier transform (InverseDiscrete Fourier Transform, IDFT) matrix determined as m×m dimensions corresponds to transforming the combined coefficients of the frequency domain to the time domain, and if the spatial compressed frequency domain coefficients have sparsity in the time domain, only a small number of time domain coefficients with larger amplitude may be fed back, and the other time domain coefficients are zero. Let only feedback k with maximum amplitude after IDFT transformation _r The number of time-domain coefficients is one,

the complex number of the feedback needed for each layer is reduced from (2L-1) M to (2L) k _r And feeding back the number of the selected k1 non-zero coefficients, achieving time domain compression, wherein The selected orthogonal base vector matrix corresponding to the corresponding position is as follows

Assume thatComprisesK is selected _r An optimal orthogonal vector, where k _r <M, then approximately recover W _2,r . For exampleIncluding selected k _r Orthogonal DFT vectors, or K right dominant singular vectors after singular value decomposition (Singular Value Decomposition, SVD) decomposition, etc. For W _2，r And (3) performing transformation to obtain:

therefore, the content requiring feedback is composed of W in 2L×M dimensions _2,r Becomes 2L x k _r Dimension(s)Selected k _r Numbering of the orthogonal vectors. The complex number of feedback needed per layer is reduced from (2L-1) M to 2L x k _r And frequency domain compression is realized.

Therefore, the terminal needs to feed back quantized signalsAnd +.>Selected orthogonal basis vector matrix corresponding to corresponding position +.>Index indicating information of (a).

Polarization differential methods have been used in NR for quantization. The specific quantization method is as follows: at the position ofThe largest amplitude coefficient is found out from the first L rows and the last L rows in the matrix to form a polarization matrix, wherein the L rows where the strongest amplitude coefficient is located are called strong polarization parts, and the other half of the L rows are called weak polarization parts.For->The front L rows and the rear L rows in the matrix are normalized according to the corresponding maximum amplitude coefficient. The polarization matrix is normalized according to the largest amplitude coefficient in the own matrix, the strong polarization coefficient in the polarization matrix is normalized to 1, amplitude and phase quantization is not needed, and the terminal informs network side equipment through the strongest coefficient indication information, and the weak amplitude polarization coefficient needs to be quantized. For polarization normalized +. >Matrix (For { c) _l,k ,(l,k)≠(l ^* ,k ^* ) Both amplitude and phase require quantization.

After codebook compression, the following parameters exist:

k0, number of sub-set coefficients, configured by the network side device for indicating multi-layer compression coefficient matrixHow many coefficients need to be fed back, i.e. for +.>Coefficients other than K0 coefficients in the matrix are considered to be 0 and are not fed back. For rank1/2, K0 coefficients are independently selected from layer to layer. For rank3/4, all layers pick out 2×K0 coefficients together, i.e. for rank1 only K0 coefficients need to be quantized, for rank>1, all layers together require quantization of 2 x k0 coefficients.

Indication information Of Non-zero coefficients (Number Of Non-Zero Coefficients Indication, NNZCI), for multi-layer compression coefficient matrixAnd the sum of all non-zero coefficients is K1, the total number of the coefficients of the subset is K0 or 2 x K0, and if K1 is smaller than the total number of the coefficients of the subset, the terminal only needs to feed back K1 coefficients. Therefore, part1 needs to feed back the indication information of the non-zero coefficient.

Bitmaps (bitmaps) are matrices of X rows, xi columns, the rows being related to the number of Spatial (SD) beams (beams) and the columns being related to the number of orthogonal base beams, where i represents the first layer. For each layer, there is a bitmap for indicating the position of the non-zero coefficients of the current layer and the number of non-zero coefficients of the current layer.

When the type two CSI report is transmitted on the PUSCH, since the network side device cannot know CSI feedback, especially the payload size of part 2, the allocated PUSCH resource may not accommodate the complete CSI report content, so the terminal needs to discard part 2 content of CSI without feedback. Assuming that N CSI reports need to be fed back in one slot, the part 2 content discard Priority (Priority) of CSI is shown in table 1: priority 0 is the highest priority, namely the content of the CSI report which is sent preferentially; the priority 2N is the lowest priority, i.e. the CSI report content discarded first, and the CSI report content of each priority is discarded as a whole.

Table 1: part 2CSI report priority

When a UE is scheduled to transmit uplink data (transport block) and one or more CSI reports on PUSCH, ifIs greater than->Part 2 of the CSI is discarded step by step in the above order until +.>Less than or equal to->Until that point. Wherein:

O _CSI-2 is the number of bits of CSI part 2;

if O _CSI-2 ≥360，L _CSI-2 =11; otherwise L _CSI-2 Is the cyclic redundancy check (Cyclic Redundancy Check, CRC) bit number of CSI part 2 determined according to a preset rule;

set CSI offset value;

is the total number of OFDM symbols within PUSCH, including all OFDM symbols transmitting DMRS;

The RE number used for transmitting UCI on OFDM symbol/in PUSCH;

C _UL-SCH is the number of code blocks of the UL-SCH transmitted on PUSCH;

if the DCI scheduling the PUSCH includes a Code Block Group Transmission Information (CBGTI) field indicating that the UE does not transmit the (r) th code block, K _r =0; otherwise K _r The size of the r code block of the UL-SCH transmitted on the PUSCH;

Q' _CSI-1 is the number of coded modulation symbols per layer of CSI part 1 transmitted on PUSCH;

if the number of HARQ-ACK information bits is greater than 2, Q' _ACK For each layer of coded modulation symbol number transmitted on PUSCH, if the HARQ-ACK information bit number is equal to 1 or 2, Q' _ACK ＝0；

Alpha is a scale parameter of the higher layer configuration;

when UE only transmits CSI report on PUSCH, part 2 of CSI is discarded step by step according to the sequence until the code rate of part 2CSI is lower than a threshold code rate c smaller than 1 _T Until now, wherein

And R is the code rate indicated by DCI for the set CSI offset value.

When transmitting type two CSI on PUCCH, discarding part 2CSI still according to the priority of table 1, discarding from the lowest priority until the code rate of part 2CSI is less than or equal to the parameter maxCodeRate configured by the higher layer.

In the related art, firstly, the bitmap and the quantization coefficients corresponding to the bitmap are grouped based on the DFT compression codebook, and after the grouping is completed, the quantization coefficients are discarded according to the corresponding priority. Correspondingly, after the decoding is completed, the network side equipment obtains the corresponding bit buffer and then carries out bit bitmap and quantized coefficient joint detection according to the established rule, wherein the joint detection means that the corresponding bitmap is decoded according to the group, the bit number of the quantized coefficient corresponding to the corresponding bitmap is obtained according to the bitmap information, the quantized coefficient is further decoded, and the information of the next group of bitmaps and quantized coefficients is continuously obtained.

The discarding principle is as follows: the content with lower priority is discarded first with higher priority, and the content with the same priority is discarded when being discarded.

It may be that the bitmap and the quantization coefficients corresponding to the bitmap are in the same group:

the priority of the bitmap of a certain group is equal to that of the quantization coefficient indicated by the bitmap of the group, if the group needs to be discarded, the bitmap of the group and the quantization coefficient indicated by the bitmap are discarded at the same time;

the priority of the bitmap of a certain group is larger than the priority of the quantized coefficients indicated by the bitmap of the group, if the group needs to be discarded, the quantized coefficients indicated by the bitmap of the group are discarded preferentially.

It may also be that the bitmap and its quantization coefficients corresponding to the bitmap are in two adjacent groups:

the priority of a bitmap of a group is greater than the priority of quantization coefficients of an adjacent group indicated by the bitmap of the group.

When bitmap and quantization coefficient indicated by the bitmap are subjected to bit mapping, elements with smaller row index values or elements with smaller bitmap column index values or elements with larger row index values or elements with larger bitmap column index values are mapped preferentially.

The element of the bitmap where the strongest coefficient is located may not be mapped.

When the CSI report is sent, the content with lower priority is discarded first, and when the content is discarded, all the content with one priority is discarded. The bit map and the quantization coefficient corresponding to the bit map may be in the same information group, if the bit map of a certain group is equal to the priority of the quantization coefficient indicated by the group, if the group needs to be discarded, the bit map of the group and the quantization coefficient indicated by the bit map are discarded at the same time; if the priority of the bitmap of a certain group is greater than the priority of the quantized coefficients indicated by the group, if the group needs to be discarded, the quantized coefficients indicated by the bitmap of the group are discarded preferentially. The quantization coefficients corresponding to the bitmaps and bitmaps can also be in two adjacent information groups, and the priority of the bitmap of a certain group can be greater than the priority of the quantization coefficient of the adjacent group indicated by the bitmap.

When the terminal discards the information set according to the above discarding rule, if a whole set of bitmap and/or quantization coefficients is discarded, the number of bits of the CSI report to be transmitted is less than the number of bits that can be carried by the uplink channel resource used to transmit the CSI report, where the number of bits that can be carried is calculated by the uplink channel resource and the target code rate, in order to ensure that the number of bits of the CSI report to be transmitted is consistent with the number of bits that can be carried, the target code rate needs to be modified, but the network side device cannot learn the modified target code rate, which results in decoding failure and further results in degradation of CSI feedback performance.

In order to solve the above problems, embodiments of the present invention provide a method, a terminal, and a network side device for transmitting a CSI report, which can ensure that the target code rate is unchanged, thereby ensuring CSI feedback performance.

The embodiment of the invention provides a transmission method of Channel State Information (CSI) report, which is applied to a terminal side, as shown in fig. 2, and the method can comprise the following steps:

step 101: grouping bit maps indicating quantized coefficients and the quantized coefficients according to grouping lengths to obtain a plurality of information groups, wherein grouping results of the quantized coefficients are obtained according to grouping results of the bit maps, and the quantized coefficients are quantized coefficients of non-zero coefficients of a compression coefficient matrix;

step 102: according to the priority information of the information group, discarding at least one of the following information in the CSI report: the public part and the plurality of information groups, wherein the bit number of the CSI report after discarding is equal to the bit number which can be carried by the uplink channel resource used for sending the CSI report, and the bit number which can be carried by the uplink channel resource used for sending the CSI report is determined according to the code rate configured by a network side and the uplink channel resource allocated for the CSI report;

Step 103: and sending the CSI report after the discarding process on the uplink channel resource.

In this embodiment, the number of bits of the CSI report after discarding the information is equal to the number of bits that can be carried by the uplink channel resource used to send the CSI report, so that the network side device and the terminal do not need to change the target code rate, and the network side device can receive and parse the CSI report according to the priority information of the information group, so as to determine the discarded part of the content of the terminal, which is favorable for the network side device to accurately obtain the channel state and optimize the CSI feedback performance.

In a specific embodiment, before discarding the information in the CSI report, the method further includes:

acquiring uplink channel resources used for sending the CSI report;

calculating uplink channel resources required for transmitting the CSI report;

and judging that the acquired uplink channel resource is smaller than the transmission resource required by the CSI report.

Among them, uplink channel resources include, but are not limited to, physical uplink control channel (Physical Uplink Control Channel, PUCCH) and/or physical uplink shared channel (Physical Uplink Share Channel, PUSCH), etc. Alternatively, the uplink channel resources may be semi-statically configured to the terminal by the network side device through radio resource control (Radio Resource Control, RRC) signaling, or may be dynamically indicated to the terminal through a physical downlink control channel (Physical Downlink Control Channel, PDCCH).

After compression is completed, the terminal obtains bit maps of all layers and quantization coefficients indicated by the bit maps, wherein the quantization coefficients comprise at least one of the following: amplitude quantization value and phase quantization value. The quantized coefficients represent that they have been quantized to bit levels. The bit map is a matrix with complete dimensions without bit mapping, the rows are equal to 2 x SD beams, the columns are equal to FD bases, where SD beams are spatial domain beams, and FD is an orthogonal base.

Optionally, the common portion has a higher priority than the plurality of information groups, and priority information of the plurality of information groups satisfies any one of the following rules:

each group of bit maps and the quantization coefficients indicated by the bit maps are positioned in the same information group, and the bit maps and the quantization coefficients indicated by the bit maps have the same priority;

each group of bit maps and the quantization coefficients indicated by the bit maps are positioned in the same information group, and the priority of the bit maps is higher than the priority of the quantization coefficients indicated by the bit maps;

each group of bit maps and the quantization coefficients indicated by the bit maps are positioned in adjacent information groups, and the priority of the bit maps is higher than the priority of the quantization coefficients indicated by the bit maps;

Each set of bitmaps is located with its indicated quantized coefficients in adjacent information sets and has a lower priority than its indicated quantized coefficients.

When discarding the information in the CSI report, discarding the information group with the lowest priority according to the bit map and the quantization coefficient from low to high in priority, and discarding the whole content corresponding to one priority.

In the CSI report, the plurality of information groups sequentially include, from high to low, a 1 st information group, a 2 nd information group, a … nd information group, and N is the total number of information groups, and when the number of bits in the common portion is less than the number of bits D that can be carried by an uplink channel resource used to send the CSI report, the step of discarding at least one of the following information in the CSI report according to the priority information of the information groups includes any one of the following:

according to the priority from low to high, discarding the content in the N information groups bit by bit until the bit number of the CSI report after discarding the information is equal to the bit number D which can be carried by the uplink channel resource for sending the CSI report;

Sequentially discarding the Nth information group, the N-1 information group, the … th information group and the t+1 information group in the whole group, and discarding the contents of the t information group bit by bit until the bit number of the CSI report after discarding the information is equal to D;

the N information group, the N-1 information group, the … information group and the t information group are discarded in the whole group, specific bits are complemented in the CSI report after the information is discarded, and the bit number of the CSI report after the bits are complemented is equal to D;

wherein t is an integer greater than or equal to 1 and less than N, the sum of the numbers of bits of the public part, the 1 st information group, the 2 nd information group, the … th information group and the t information group is greater than D, and the sum of the numbers of bits of the public part, the 1 st information group, the 2 nd information group, the … th information group and the t-1 st information group is less than D.

In the CSI report, when the number of bits in the common portion is greater than or equal to the number of bits D that can be carried by the uplink channel resource used to send the CSI report, the step of discarding at least one of the following information in the CSI report according to the priority information of the information group includes any one of the following:

according to the priority from low to high, discarding the content in the public part and the plurality of information groups bit by bit until the bit number of the CSI report after discarding the information is equal to the bit number D which can be carried by the uplink channel resource for sending the CSI report;

Discarding the plurality of information groups in a whole group according to the priority from low to high, and discarding the content of the public part bit by bit until the bit number of the CSI report after discarding the information is equal to D;

and discarding the plurality of information groups and the common part in the whole group according to the priority from low to high, and supplementing specific bits in the CSI report after discarding the information, so that the bit number of the CSI report after supplementing the bits is equal to D.

Optionally, the specific bit is 0 or 1.

Optionally, the common portion includes at least one of the following information: spatial beam information, oversampling information, information of the strongest coefficient, indication information of frequency domain orthogonal basis, and weak polarization reference amplitude quantization information.

Optionally, the packet length is determined in any of the following ways:

protocol specification;

configuring network side equipment;

the terminal sets and reports to the network side equipment;

determining according to the number of the spatial domain beams configured by the network side equipment;

and the grouping coefficient is obtained through calculation, and the grouping coefficient is more than or equal to 0 and less than or equal to 1.

Optionally, the grouping coefficient is determined in any one of the following ways:

protocol specification;

configuring network side equipment;

And setting by the terminal and reporting to the network side equipment.

Optionally, when the packet length is calculated by a packet coefficient, the packet length is calculated by any one of the following means:

-said grouping length = ceil (said grouping coefficient x dimension), said dimension being equal to the length of a row or column of said bitmap;

the grouping length = floor (the grouping coefficient dimension), the dimension being equal to the length of the bitmap row or column;

the packet length=floor (the packet coefficient is BS);

the packet length=ceil (the packet coefficient is BS), BS is the total number of bits of the bit map.

The following describes a method for transmitting CSI reports of a terminal in combination with a specific embodiment:

example 1

In this embodiment, the information groups may be discarded according to the priority from low to high, and when a certain information group is discarded, the number of bits of the remaining CSI report is slightly greater than D, the next group of information groups is discarded bit by bit until the number of bits of the CSI report after discarding the information is equal to D.

In a specific example, as shown in fig. 8, the quantized coefficients and bit maps of the CSI report are divided into information group 4, information group 3, information group 2, information group 1 and information group 0 according to priorities, each information group including bit maps and quantized coefficients, wherein the sum of the numbers of bits of the common part, information group 0 to information group 3 is greater than D, and the sum of the numbers of bits of the common part, information group 0 to information group 2 is less than D. When discarding information, the entire set of discarding information set 4 is first discarded, and then the contents in information set 3 are discarded bit by bit until the number of bits of the CSI report after discarding the information is equal to D.

After sending the CSI report after discarding the information to the network side device, because the information set 3 is incomplete, the network side device does not use the information set 3 to recover the codebook of the CSI report, and may directly not use the information set 3 when recovering the codebook of the CSI report, or consider the content in the information set 3 as a default value, and the default value may be 0 or 1 when the content in the information set 3 is a bitmap; when the content in the information group 3 is a quantized coefficient, the default value may be any one of the protocol conventions in the candidate quantized set, or may be all 0 bits or all 1 bits.

In another specific example, as shown in fig. 9, quantization coefficients and bit maps of CSI reports are divided into information group 9, information group 8, …, information group 3, information group 2, information group 1 and information group 0 according to priorities from low to high, wherein information group 0, information group 2, information group 4, information group 6 and information group 8 contain only bit maps, information group 1, information group 3, information group 5, information group 7 and information group 9 contain only quantization coefficients, the sum of the numbers of bits of the common portion, information group 0 to information group 7 is greater than D, and the sum of the numbers of bits of the common portion, information group 0 to information group 6 is less than D. When discarding information, the entire group of discarding information group 9 and information group 8 is first discarded, and then the content in information group 7 is discarded bit by bit until the number of bits of the CSI report after discarding information is equal to D.

After sending the CSI report after discarding the information to the network side device, because the information set 7 is incomplete, the network side device does not use the information set 7 to recover the codebook of the CSI report, and may directly not use the information set 7 when recovering the codebook of the CSI report, or consider the content in the information set 7 as a default value, and the default value may be 0 or 1 when the content in the information set 7 is a bitmap; when the content in the information group 7 is a quantized coefficient, the default value may be any one of the protocol conventions in the candidate quantized set, or may be all 0 bits or all 1 bits.

Example two

In this embodiment, the content of the information group may be discarded in units of bits according to the priority from low to high until the number of bits of the CSI report after discarding the information is equal to D.

Specifically, as shown in fig. 10, the quantized coefficients and bit maps of the CSI report are divided into information group 4, information group 3, information group 2, information group 1 and information group 0 according to the priority from low to high, each information group including bit maps and quantized coefficients, wherein the sum of the numbers of bits of the common part, information group 0 to information group 3 is greater than D, and the sum of the numbers of bits of the common part, information group 0 to information group 2 is less than D. When discarding information, the contents in the information group 4 and the information group 3 are discarded bit by bit until the bit number of the CSI report after discarding the information is equal to D.

Alternatively, as shown in fig. 11, the quantization coefficients and bit maps of the CSI report are divided into information group 9, information group 8, …, information group 3, information group 2, information group 1 and information group 0 according to the priority, wherein information group 0, information group 2, information group 4, information group 6 and information group 8 contain only bit maps, information group 1, information group 3, information group 5, information group 7 and information group 9 contain only quantization coefficients, the sum of the numbers of bits of the common portion, information group 0-information group 7 is larger than D, and the sum of the numbers of bits of the common portion, information group 0-information group 6 is smaller than D. When discarding information, the contents in the information group 0, the information group 8 and the information group 7 are discarded bit by bit until the bit number of the CSI report after discarding the information is equal to D.

Example III

In this embodiment, the information group may be discarded in a group unit according to the priority from low to high until the number of bits of the CSI report after discarding the information is less than D, and a specific bit is complemented in the CSI report after discarding the information, so that the number of bits of the CSI report after complementing the bit is equal to D.

Specifically, as shown in fig. 12, the quantized coefficients and bit maps of the CSI report are divided into information group 4, information group 3, information group 2, information group 1 and information group 0 according to the priority from low to high, each information group including bit maps and quantized coefficients, wherein the sum of the numbers of bits of the common part, information group 0 to information group 3 is greater than D, and the sum of the numbers of bits of the common part, information group 0 to information group 2 is less than D. When discarding information, the content in the entire discarded information group 4 and the information group 3, the bit number of the CSI report after discarding information is smaller than D, and specific bits are complemented in the CSI report after discarding information, so that the bit number of the CSI report after complementing bits is equal to D, wherein the specific bits can be 0 or 1.

After sending the CSI report after discarding the information to the network side device, the network side device does not recover the codebook of the CSI report by using the specific bit because the specific bit has no practical meaning.

Alternatively, as shown in fig. 13, the quantization coefficients and bit maps of the CSI report are divided into information group 9, information group 8, …, information group 3, information group 2, information group 1 and information group 0 according to the priority, wherein information group 0, information group 2, information group 4, information group 6 and information group 8 contain only bit maps, information group 1, information group 3, information group 5, information group 7 and information group 9 contain only quantization coefficients, the sum of the numbers of bits of the common portion, information group 0-information group 7 is larger than D, and the sum of the numbers of bits of the common portion, information group 0-information group 6 is smaller than D. When discarding information, the whole group of discarding information group 9, information group 8 and information group 7 is used until the bit number of the CSI report after discarding the information is less than D.

The number of bits of the CSI report after discarding the information is smaller than D, and a specific bit is complemented in the CSI report after discarding the information, so that the number of bits of the CSI report after complementing the bit is equal to D, wherein the specific bit may be 0 or 1.

The above embodiments describe a transmission method of channel state information CSI reports in different scenarios, and the following will further describe a terminal corresponding to the transmission method with reference to the accompanying drawings.

As shown in fig. 3, the terminal 300 according to the embodiment of the present invention includes a transmission device for CSI reports, which can send CSI reports to the network side device in the above embodiment, and achieve the same effect, and the terminal 300 specifically includes the following functional modules:

a grouping module 310, configured to group, according to a grouping length, a bit map indicating quantized coefficients and the quantized coefficients, to obtain a plurality of information groups, where a grouping result of the quantized coefficients is obtained according to a grouping result of the bit map, and the quantized coefficients are quantized coefficients of non-zero coefficients of a compressed coefficient matrix;

a discarding module 320, configured to discard at least one of the following information in the CSI report according to the priority information of the information group: the public part and the plurality of information groups, wherein the bit number of the CSI report after discarding is equal to the bit number which can be carried by the uplink channel resource used for sending the CSI report, and the bit number which can be carried by the uplink channel resource used for sending the CSI report is determined according to the code rate configured by a network side and the uplink channel resource allocated for the CSI report;

And a sending module 330, configured to send the CSI report after the discarding process on the uplink channel resource.

Optionally, the apparatus is further configured to obtain an uplink channel resource used to send the CSI report; calculating uplink channel resources required for transmitting the CSI report; and judging that the acquired uplink channel resource is smaller than the transmission resource required by the CSI report.

In the CSI report, the plurality of information groups are, in order from high to low, the 1 st information group, the 2 nd information group, the … nd information group, and N is the total number of information groups, where in the case that the number of bits in the common portion is less than the number of bits D that can be carried by the uplink channel resource used to send the CSI report, the discarding module 320 is specifically configured to execute any one of the following:

In the CSI report, when the number of bits in the common portion is greater than or equal to the number of bits D that can be carried by the uplink channel resource used to send the CSI report, the discarding module 320 is specifically configured to perform any one of the following:

Optionally, the specific bit is 0 or 1.

Optionally, the packet length is determined in any of the following ways:

protocol specification;

configuring network side equipment;

the terminal sets and reports to the network side equipment;

protocol specification;

configuring network side equipment;

and setting by the terminal and reporting to the network side equipment.

the packet length=floor (the packet coefficient is BS);

To better achieve the above objects, further, fig. 4 is a schematic hardware structure of a terminal for implementing various embodiments of the present invention, where the terminal 40 includes, but is not limited to: radio frequency unit 41, network module 42, audio output unit 43, input unit 44, sensor 45, display unit 46, user input unit 47, interface unit 48, memory 49, processor 410, and power 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.

The radio frequency unit 41 is configured to send a channel state information CSI report to a network side device;

a processor 410, configured to group a bit map indicating quantized coefficients and the quantized coefficients according to a grouping length to obtain a plurality of information groups, where the grouping result of the quantized coefficients is obtained according to the grouping result of the bit map, and the quantized coefficients are quantized coefficients of non-zero coefficients of a compressed coefficient matrix; according to preset priority information, discarding at least one of the following information in the CSI report: and the common part and the plurality of information groups until the bit number of the CSI report after discarding is equal to the bit number which can be carried by the uplink channel resource used for sending the CSI report, wherein the bit number which can be carried by the uplink channel resource used for sending the CSI report is determined according to the code rate configured by a network side and the uplink channel resource allocated for the CSI report.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 41 may be used for receiving and transmitting signals during the process of receiving and transmitting information or communication, specifically, receiving downlink data from the 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 41 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 41 may also communicate with networks and other devices via a wireless communication system.

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

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

The input unit 44 is for receiving an audio or video signal. The input unit 44 may include a graphics processor (Graphics Processing Unit, GPU) 441 and a microphone 442, the graphics processor 441 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 46. The image frames processed by the graphics processor 441 may be stored in the memory 49 (or other storage medium) or transmitted via the radio frequency unit 41 or the network module 42. The microphone 442 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 41 in the case of a telephone call mode.

The terminal 40 further comprises at least one sensor 45, 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 461 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 461 and/or the backlight when the terminal 40 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the 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 45 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 will not be described herein.

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

The user input unit 47 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 47 includes a touch panel 471 and other input devices 472. The touch panel 471, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 471 or thereabout using any suitable object or accessory such as a finger, stylus, etc.). The touch panel 471 may include two parts of 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 471 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 47 may include other input devices 472 in addition to the touch panel 471. In particular, other input devices 472 may include, but are not limited to, physical keyboards, function keys (e.g., volume control keys, switch keys, etc.), trackballs, mice, joysticks, and so forth, which are not described in detail herein.

Further, the touch panel 471 may be overlaid on the display panel 461, and when the touch panel 471 detects a touch operation thereon or thereabout, the touch panel 471 is transmitted 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 461 according to the type of touch event. Although in fig. 4, the touch panel 471 and the display panel 461 are provided as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 471 may be integrated with the display panel 461 to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 48 is an interface to which an external device is connected to the terminal 40. 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 48 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 40 or may be used to transmit data between the terminal 40 and an external device.

The memory 49 may be used to store software programs as well as various data. The memory 49 may mainly include a 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 49 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The processor 410 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by running or executing software programs and/or modules stored in the memory 49 and calling data stored in the memory 49, thereby performing overall monitoring of the terminal. Processor 410 may include one or more processing units; preferably, the processor 410 may integrate an application processor 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 40 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 40 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 49, and a computer program stored in the memory 49 and capable of running on the processor 410, where the computer program when executed by the processor 410 implements the respective processes of the above-mentioned transmission method embodiment of the CSI report, and can achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein. The terminal may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or other service data connectivity to a user, a handheld device with wireless connection functionality, or other processing device connected to a wireless modem. The wireless terminals may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), which may be mobile terminals such as mobile phones (or "cellular" phones) and computers with mobile terminals, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiation Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. A wireless Terminal may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), mobile Station (Mobile), remote Station (Remote Station), remote Terminal (Remote Terminal), access Terminal (Access Terminal), user Terminal (User Terminal), user Agent (User Agent), user equipment (User Device or User Equipment), without limitation.

The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the above-mentioned processes of the transmission method embodiment applied to the CSI report of the terminal side, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here. 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.

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

As shown in fig. 5, the transmission method of the CSI report according to the embodiment of the present invention is applied to a network side device, and the method may include the following steps:

step 201: receiving a Channel State Information (CSI) report of a terminal, wherein quantized coefficients of non-zero coefficients of a compression coefficient matrix and bit maps indicating the quantized coefficients in the CSI report are divided into a plurality of information groups;

Step 202: determining the bit number of a bit map in an information group according to the priority information of the information group, and demodulating the bit map according to the bit number of the bit map;

step 203: and determining the bit number of the quantized coefficient according to the demodulated bit map, and demodulating the quantized coefficient according to the bit number of the quantized coefficient.

In this embodiment, the network side device may receive and parse the CSI report according to the priority information of the information group, determine the content in the CSI report, learn the channel state, and optimize the CSI feedback performance.

According to the configured uplink channel resource, the network side equipment decodes part 2 to a bit level after receiving the CSI report according to the CSI parameter configured by the network side equipment and the information carried by part 1 in the CSI report, wherein a part of a non-bit bitmap and a quantization coefficient in part 2 can be obtained by the part 1 and the CSI parameter information configured by the network side equipment, and the rest part, namely the bit bitmap and the quantization coefficient part, sequentially determines the bit bitmap and the corresponding quantization coefficient according to priority information of a corresponding information group and from high to low according to priority.

Optionally, the quantization coefficients include at least one of: amplitude quantization value and phase quantization value.

Optionally, the priority information of the information group satisfies any one of the following rules:

Optionally, after demodulating the quantized coefficients according to the number of bits of the quantized coefficients, the method further includes any one of:

if an information group comprises a bit bitmap, but the bit number of the bit bitmap is inconsistent with the preset number, recovering the codebook of the CSI report without using the information group;

if one information group comprises quantized coefficients, and the bit number of the quantized coefficients of the information group is inconsistent with the bit number indicated by the bit map corresponding to the quantized coefficients of the information group, recovering the codebook of the CSI report without using the information group;

If an information group comprises a bit bitmap, but the bit number of the bit bitmap is inconsistent with the preset number, and the information group is filled with specific bits, the codebook of the CSI report is restored without using the specific bits;

if an information group comprises quantized coefficients, the bit number of the quantized coefficients of the information group is inconsistent with the bit number indicated by the bit map corresponding to the quantized coefficients of the information group, and specific bits are filled in the information group, the codebook of the CSI report is restored without using the specific bits.

The network side device does not use the information group to recover the codebook of the CSI report, and can directly not use the information group when recovering the codebook of the CSI report, or consider the content in the information group as a default value, and the default value can be 0 or 1 when the content in the information group is a bitmap; when the content in the information group is a quantized coefficient, the default value may be any one of the protocol conventions in the candidate quantized set, or may be all 0 bits or all 1 bits. In addition, since the specific bit does not have a practical meaning, the network side device does not recover the codebook of the CSI report using the specific bit.

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

As shown in fig. 6, a network side device 600 according to an embodiment of the present invention includes a transmission apparatus for CSI reports, which can receive CSI reports of channel state information in the above embodiment and achieve the same effect, where the network side device 600 specifically includes the following functional modules:

a receiving module 610, configured to receive a CSI report of a terminal, where quantized coefficients of non-zero coefficients of a compression coefficient matrix and a bit map indicating the quantized coefficients in the CSI report are divided into a plurality of information groups;

a processing module 620, configured to determine, according to priority information of an information group, a bit number of a bit map in the information group, and demodulate the bit map according to the bit number of the bit map; and determining the bit number of the quantized coefficient according to the demodulated bit map, and demodulating the quantized coefficient according to the bit number of the quantized coefficient.

Optionally, after demodulating the quantized coefficients according to the number of bits of the quantized coefficients, the processing module 620 is further configured to perform any one of the following:

The processing module 620 does not use the information set to recover the codebook of the CSI report, and may directly not use the information set when recovering the codebook of the CSI report, or consider the content in the information set as a default value, and the default value may be 0 or 1 when the content in the information set is a bitmap; when the content in the information group is a quantized coefficient, the default value may be any one of the protocol conventions in the candidate quantized set, or may be all 0 bits or all 1 bits. In addition, since the specific bit does not have a practical meaning, the network side device does not recover the codebook of the CSI report using the specific bit.

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

For example, the modules above may be one or more integrated circuits configured to implement the methods above, such as: one or more specific integrated circuits (Application Specific Integrated Circuit, ASIC), or one or more microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), or the like. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

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

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

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

The baseband device 73 may also include a network interface 76 for interacting with the radio frequency device 72, such as a common public radio interface (common public radio interface, CPRI).

The processor may be a processor, or may be a generic term for a plurality of processing elements, for example, the processor may be a CPU, or may be an ASIC, or may be one or more integrated circuits configured to implement the methods performed by the network side devices, for example: one or more microprocessor DSPs, or one or more field programmable gate array FPGAs, etc. The memory element may be one memory or may be a collective term for a plurality of memory elements.

The memory 75 may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be a random access memory (RandomAccessMemory, RAM) that acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic random access memory (DynamicRAM, DRAM), synchronous dynamic random access memory (SynchronousDRAM, SDRAM), double data rate synchronous dynamic random access memory (DoubleDataRateSDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (EnhancedSDRAM, ESDRAM), synchronous link dynamic random access memory (SynchlinkDRAM, SLDRAM), and direct memory bus random access memory (DirectRambusRAM, DRRAM). The memory 75 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

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

In particular, the computer program, when invoked by the processor 74, is operable to perform: receiving a Channel State Information (CSI) report of a terminal, wherein quantized coefficients of non-zero coefficients of a compression coefficient matrix and bit maps indicating the quantized coefficients in the CSI report are divided into a plurality of information groups; determining the bit number of a bit map in an information group according to the priority information of the information group, and demodulating the bit map according to the bit number of the bit map; and determining the bit number of the quantized coefficient according to the demodulated bit map, and demodulating the quantized coefficient according to the bit number of the quantized coefficient.

The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the above-mentioned processes of the transmission method embodiment of the channel state information CSI report applied to the network side device, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here. 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.

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

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

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network side device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

Furthermore, it should be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. Also, the steps of performing the series of processes described above may naturally be performed in chronological order in the order of description, but are not necessarily performed in chronological order, and some steps may be performed in parallel or independently of each other. It will be appreciated by those of ordinary skill in the art that all or any of the steps or components of the methods and apparatus of the present invention may be implemented in hardware, firmware, software, or a combination thereof in any computing device (including processors, storage media, etc.) or network of computing devices, as would be apparent to one of ordinary skill in the art after reading this description of the invention.

The object of the invention can thus also be achieved by running a program or a set of programs on any computing device. The computing device may be a well-known general purpose device. The object of the invention can thus also be achieved by merely providing a program product containing program code for implementing said method or apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is apparent that the storage medium may be any known storage medium or any storage medium developed in the future. It should also be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. The steps of executing the series of processes may naturally be executed in chronological order in the order described, but are not necessarily executed in chronological order. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present invention, and such modifications and changes are intended to be within the scope of the present invention.

Claims

1. A transmission method of a CSI report applied to a terminal, comprising:

Transmitting the discarded CSI report on the uplink channel resource;

the grouping length is calculated by a grouping coefficient, wherein the grouping coefficient is more than or equal to 0 and less than or equal to 1, and the grouping length is calculated by any one of the following modes:

the packet length=floor (the packet coefficient is BS);

2. The transmission method of CSI reports according to claim 1, wherein the common part has a higher priority than the plurality of information groups, and the priority information of the plurality of information groups satisfies any one of the following rules:

3. The transmission method of CSI report according to claim 2, wherein the plurality of information groups are, in order from high to low, the 1 st information group, the 2 nd information group, the … nd information group, and the N-th information group, N being the total number of groups of information groups, and the step of discarding at least one of the following information in the CSI report according to the priority information of the information groups in case that the number of bits of the common part is smaller than the number D of bits that can be carried by the uplink channel resource used to transmit the CSI report comprises:

according to the priority from low to high, discarding the content in N information groups bit by bit until the bit number of the CSI report after discarding the information is equal to the bit number D which can be carried by the uplink channel resource for transmitting the CSI report;

4. The transmission method of CSI report according to claim 2, wherein in the case that the number of bits of the common part is equal to or greater than the number of bits D that can be carried by the uplink channel resource used to transmit the CSI report, the step of discarding at least one of the following information in the CSI report according to the priority information of the information group includes any one of the following:

5. The transmission method of CSI reports according to claim 3 or 4, characterized in that the specific bit is 0 or 1.

6. The transmission method of CSI reports according to claim 1, characterized in that said common part comprises at least one of the following information: spatial beam information, oversampling information, information of the strongest coefficient, indication information of frequency domain orthogonal basis, and weak polarization reference amplitude quantization information.

7. The method for transmitting CSI reports according to claim 1, wherein said packet length is further determined in any of the following ways:

protocol specification;

configuring network side equipment;

the terminal sets and reports to the network side equipment;

and determining according to the number of the spatial domain beams configured by the network side equipment.

8. The method for transmitting CSI reports according to claim 1, wherein said grouping coefficients are determined in any of the following ways:

protocol specification;

configuring network side equipment;

And setting by the terminal and reporting to the network side equipment.

9. A transmission method of a channel state information CSI report, applied to a network side device side, comprising:

determining the bit number of the quantization coefficient according to the demodulated bit map, and demodulating the quantization coefficient according to the bit number of the quantization coefficient;

the CSI report is that the terminal discards at least one of the following information in the CSI report according to the priority information of the information group: the public part and the plurality of information groups, wherein the bit number of the CSI report after discarding is equal to the bit number which can be carried by the uplink channel resource used for sending the CSI report, and the bit number which can be carried by the uplink channel resource used for sending the CSI report is determined according to the code rate configured by a network side and the uplink channel resource allocated for the CSI report;

The information group is obtained by grouping a bit map indicating a quantized coefficient and the quantized coefficient according to a grouping length, the grouping length is obtained by grouping coefficient calculation, the grouping coefficient is greater than or equal to 0 and less than or equal to 1, and the grouping length is calculated by any one of the following modes:

the packet length=floor (the packet coefficient is BS);

10. The transmission method of CSI reports according to claim 9, wherein after demodulating the quantized coefficients according to the number of bits of the quantized coefficients, the method further comprises any one of:

11. The transmission method of CSI reports according to claim 10, wherein said specific bit is 0 or 1.

12. The transmission method of CSI reports according to claim 9, wherein the priority information of the information sets satisfies any one of the following rules:

13. A transmission apparatus for a CSI report, applied to a terminal, comprising:

a sending module, configured to send the CSI report after the discarding process on the uplink channel resource;

the packet length=floor (the packet coefficient is BS);

14. A transmission apparatus for a CSI report applied to a network device, comprising:

the processing module is used for determining the bit number of the bit map in the information group according to the priority information of the information group and demodulating the bit map according to the bit number of the bit map; determining the bit number of the quantization coefficient according to the demodulated bit map, and demodulating the quantization coefficient according to the bit number of the quantization coefficient;

the packet length=floor (the packet coefficient is BS);

15. A communication device, characterized in that it comprises a processor, a memory and a computer program stored on the memory and running on the processor, which when executed implements the steps of the method for transmitting channel state information CSI reports according to any of claims 1 to 12.

16. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method for transmitting channel state information CSI reports according to any of claims 1 to 12.