CN112398518B

CN112398518B - Information transmission method and device and communication equipment

Info

Publication number: CN112398518B
Application number: CN201910750405.XA
Authority: CN
Inventors: 李辉; 刘正宣; 高秋彬
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2022-06-10
Anticipated expiration: 2039-08-14
Also published as: CN112398518A

Abstract

The application discloses an information transmission method, an information transmission device and communication equipment, and belongs to the technical field of communication. In the application, a terminal device performs channel measurement to obtain a CSI, wherein the CSI comprises at least one layer of nonzero coefficient set and nonzero coefficient position indication information; the terminal equipment discards partial information in the CSI according to a CSI discarding rule, wherein the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded according to a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate; and the terminal equipment sends the CSI with the discarded part of information to the network equipment. Therefore, for example, under the condition that the allocated uplink resources are insufficient, the terminal device can discard and report part of the CSI, so that the reported CSI can be correctly decoded by the network side, the reliability of the system is further ensured, and the system performance is improved.

Description

Information transmission method and device and communication equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information transmission method and apparatus, and a communication device.

Background

In the NR Rel-15 system, a type ii (typeii) codebook is defined that supports both the rank1 codebook and the rank2 codebook based on the way in which beams within the orthogonal beam group are linearly combined.

For one subband, the rank1 codebook is expressed as:

for one subband, the rank2 codebook is expressed as:

wherein the content of the first and second substances,

l represents the number of orthogonal beams within the group,

represents orthogonal beams, which employ 2D DFT (two-dimensional discrete fourier transform) vectors; r-0, 1 denotes the first and second polarization directions in the dual-polarized antenna array, l-0, 1 denotes a layer.

Representing the broadband amplitude coefficients acting on the beam i, the polarization direction r and the layer l in the beam group;

representing the subband amplitude coefficients acting on the beam i, the polarization direction r and the layer l in the beam group; c. C_r,l,iThe subband phase coefficients acting on the beam i, the polarization direction r and the layer l in the beam group are shown.

The number of codebook coefficients of rank-2 is about one time of the number of codebook coefficients of rank-1, and thus the overhead of codebooks is greatly different when the values of Rank Indication (RI) are different. When the base station receives Channel State Information (CSI) fed back by the terminal, the base station cannot know the value of the RI before correctly decoding, and thus cannot determine the overhead of the CSI. In order to avoid that the base station cannot correctly perform CSI decoding due to overhead ambiguity, in Rel-15, a two-part structure is adopted for reporting Type II CSI. The first part of the CSI comprises: RI, a wideband Quality Indicator (CQI) corresponding to a first codeword (codeword), a differential CQI corresponding to the first codeword (codeword), the number of zero coefficients in layer one, and the number of zero coefficients in layer two; the second part of the CSI comprises: the antenna comprises a rotation factor, beam indication information, a strongest beam indication of a layer one, a wideband amplitude coefficient of a layer one, a strongest beam indication of a layer two, a wideband amplitude coefficient of a layer two, at least one of a subband phase and a subband amplitude coefficient of an even subband, and at least one of a subband phase and a subband amplitude coefficient of an odd subband. The overhead of the first part of the CSI is fixed and is irrelevant to the value of the RI, and the overhead of the second part of the CSI can be determined by the result of decoding of the first part.

Because the feedback of each subband includes both a subband phase coefficient and a subband amplitude coefficient, when the number of subbands is large, the feedback overhead required for feeding back coefficients of all subbands is huge, and for this reason, Precoding Matrix Indicator (PMI) information of a part of subbands may be discarded when the terminal reports CSI.

A low-overhead Type II codebook is defined in the NR Rel-16 system, the coefficient of each sub-band is compressed, and the compressed differential amplitude coefficient, phase coefficient and reference amplitude coefficient are all fed back to a base station. The Type II codebook defined in Rel-16 has no report amount of the sub-band, and the discarding mechanism of Rel-15 cannot be reused. At present, no corresponding CSI discarding mechanism and corresponding feedback method exist for the codebook structure of Rel-16.

Disclosure of Invention

The embodiment of the application provides an information transmission method, an information transmission device and communication equipment, which are used for providing a CSI discarding scheme.

In a first aspect, an information transmission method is provided, where the method includes:

the method comprises the steps that terminal equipment carries out channel measurement to obtain CSI, wherein the CSI comprises at least one layer of nonzero coefficient set and nonzero coefficient position indication information;

the terminal equipment discards partial information in the CSI according to a CSI discarding rule; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate;

And the terminal equipment sends the CSI with the discarded part of information to the network equipment.

In a possible implementation manner, the discarding part of information in the CSI includes:

the terminal equipment discards non-zero coefficient position indication information in the CSI according to preset granularity; the predetermined granularity is a part or all of the non-zero coefficient position indication information of one layer, or the predetermined granularity is a part or all of the non-zero coefficient position indication information of each of at least two layers.

and the terminal equipment determines bit number related information needing to be discarded and discards bits needing to be discarded in the non-zero coefficient position indication information indicated by the bit number related information.

In a possible implementation, the bit number related information includes an indication of the number of frequency domain basis vectors.

In one possible implementation, the method further includes:

and the terminal equipment sends the bit number related information to the network equipment.

The terminal equipment determines a first number of non-zero coefficients needing to be discarded according to the discarded non-zero coefficient position indication information and the preset threshold or the preset code rate, and discards the non-zero coefficients of the first number; alternatively, the first and second liquid crystal display panels may be,

the terminal equipment determines the non-zero coefficient position indication information needing to be discarded according to the discarded non-zero coefficient and the preset threshold or the preset code rate, and discards the non-zero coefficient position indication information needing to be discarded; alternatively, the first and second electrodes may be,

the terminal equipment determines non-zero coefficient position indication information needing to be discarded and a second number of non-zero coefficients needing to be discarded according to the preset threshold or the preset code rate, and discards the non-zero coefficient position indication information needing to be discarded and the non-zero coefficients of the second number;

wherein, the overhead occupied by the CSI with the part of information discarded meets the predetermined threshold or the predetermined code rate.

the terminal equipment determines a third number of non-zero coefficients needing to be discarded in the CSI according to the preset threshold or the preset code rate;

The terminal equipment determines non-zero coefficient position indication information needing to be discarded in the CSI according to the preset discarding rule, wherein the non-zero coefficient position indication information needing to be discarded corresponds to a fourth number of non-zero coefficients;

when the fourth number is smaller than the third number, the terminal device discards all non-zero coefficients corresponding to the non-zero coefficient position indication information that needs to be discarded, discards N non-zero coefficients in all non-zero coefficients corresponding to the non-discarded non-zero coefficient position indication information, and updates the non-zero position indication information corresponding to the N non-zero coefficients to zero coefficient indication, where N is a difference between the third number and the fourth number;

when the fourth number is greater than or equal to the third number, the terminal device discards all non-zero coefficients corresponding to the non-zero coefficient position indication information to be discarded, and supplements M coefficient reports with any values, wherein M is the difference between the fourth number and the third number; alternatively, the first and second liquid crystal display panels may be,

and when the fourth number is greater than or equal to the third number, the terminal device discards the non-zero coefficients of the third number in all the non-zero coefficients corresponding to the non-zero coefficient position indication information needing to be discarded.

In a possible implementation manner, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the terminal device by the network device.

In one possible implementation, the method further includes:

and when the non-zero coefficient position indication information of one layer of the CSI is completely discarded, the terminal equipment discards at least one of the frequency domain base indication, the strongest coefficient index and the reference amplitude coefficient of the layer.

In a second aspect, an information transmission method is provided, the method including:

the network equipment receives Channel State Information (CSI) sent by the terminal equipment;

the network equipment determines that part of information in the CSI is discarded, and decodes the CSI according to a CSI discarding rule adopted by the terminal equipment; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding the non-zero coefficient in the CSI according to a preset threshold or a preset code rate.

In one possible implementation, the CSI includes a first part of CSI or a first part of CSI and a second part of CSI, where the first part of CSI includes RI and total number indication information of non-zero coefficients of all layers, and the second part of CSI includes all or part of non-zero coefficients of at least one layer and non-zero coefficient position indication information;

The decoding the CSI according to the CSI discard rule adopted by the terminal device includes:

the network equipment determines an information field contained in a second part of the CSI according to the first part of the CSI and/or the CSI discarding rule;

and the network equipment decodes the second part of the CSI according to the information field contained in the second part of the CSI and the CSI discarding rule.

In one possible implementation, the decoding the second part of the CSI includes:

the network equipment determines the number of nonzero coefficients included in a first layer in a second part in the CSI; wherein the first layer is one of all layers included in the CSI;

the network equipment determines the number of nonzero coefficients correspondingly indicated by the nonzero coefficient position indication information of the first layer;

if the number of the nonzero coefficients included in the first layer is larger than the number of the nonzero coefficients correspondingly indicated by the nonzero coefficient position indication information of the first layer, the network equipment ignores the nonzero coefficients which do not correspond to the nonzero coefficient position indication information of the first layer in the nonzero coefficient information domain of the first layer.

In a third aspect, a communication device is provided, comprising:

a memory for storing program instructions;

a processor for calling the program instructions stored in the memory and executing according to the obtained program:

performing channel measurement to obtain CSI, wherein the CSI comprises at least one layer of nonzero coefficient set and nonzero coefficient position indication information; according to a CSI discarding rule, discarding part of information in the CSI; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate;

and the transceiver is used for transmitting the CSI with the discarded part of information to the network equipment.

In one possible implementation, the processor executes, according to the obtained program:

discarding non-zero coefficient position indication information in the CSI according to a preset granularity; the predetermined granularity is a part or all of the non-zero coefficient position indication information of one layer, or the predetermined granularity is a part or all of the non-zero coefficient position indication information of each of at least two layers.

And determining bit number related information needing to be discarded, and discarding bits needing to be discarded in the non-zero coefficient position indication information indicated by the bit number related information.

In one possible implementation, the transceiver is further configured to:

and sending the bit number related information to the network equipment.

determining a first number of non-zero coefficients needing to be discarded according to the discarded non-zero coefficient position indication information and the preset threshold or the preset code rate, and discarding the non-zero coefficients of the first number; alternatively, the first and second electrodes may be,

determining non-zero coefficient position indication information needing to be discarded according to the discarded non-zero coefficient and the preset threshold or the preset code rate, and discarding the non-zero coefficient position indication information needing to be discarded; alternatively, the first and second electrodes may be,

according to the preset threshold or the preset code rate, determining non-zero coefficient position indication information needing to be discarded and a second number of non-zero coefficients needing to be discarded, and discarding the non-zero coefficient position indication information needing to be discarded and the non-zero coefficients of the second number;

Wherein, the cost occupied by the CSI with the part of information discarded meets the predetermined threshold or the predetermined code rate.

determining a third number of non-zero coefficients needing to be discarded in the CSI according to the predetermined threshold or the predetermined code rate;

determining non-zero coefficient position indication information which needs to be discarded in the CSI according to the preset discarding rule, wherein the non-zero coefficient position indication information which needs to be discarded corresponds to a fourth number of non-zero coefficients;

when the fourth number is smaller than the third number, discarding all non-zero coefficients corresponding to the non-zero coefficient position indication information needing to be discarded, discarding N non-zero coefficients in all non-zero coefficients corresponding to the non-discarded non-zero coefficient position indication information, and updating the non-zero position indication information corresponding to the N non-zero coefficients to be zero coefficient indication, wherein N is the difference between the third number and the fourth number;

when the fourth number is greater than or equal to the third number, discarding all non-zero coefficients corresponding to the non-zero coefficient position indication information to be discarded, and supplementing M coefficients with any values to report, wherein M is the difference between the fourth number and the third number; alternatively, the first and second electrodes may be,

And when the fourth number is greater than or equal to the third number, discarding the non-zero coefficient of the third number in all the non-zero coefficients corresponding to the non-zero coefficient position indication information needing to be discarded.

In a possible implementation manner, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the communication device by the network device.

and when the non-zero coefficient position indication information of one layer of the CSI is completely discarded, discarding at least one of the frequency domain base indication, the strongest coefficient index and the reference amplitude coefficient of the layer.

In a fourth aspect, there is provided a communication device comprising:

the transceiver is used for receiving the CSI sent by the terminal equipment;

a memory for storing program instructions;

if partial information in the CSI is determined to be discarded, decoding the CSI according to a CSI discarding rule adopted by the terminal equipment; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding the non-zero coefficient in the CSI according to a preset threshold or a preset code rate.

the processor executes according to the obtained program:

determining an information field contained in the second part of the CSI according to the first part of the CSI and/or the CSI discarding rule;

and decoding the second part of the CSI according to an information field contained in the second part of the CSI and the CSI discarding rule.

determining the number of nonzero coefficients included in a first layer in a second part of the CSI; wherein the first layer is one of all layers included in the CSI;

determining the number of nonzero coefficients correspondingly indicated by the nonzero coefficient position indication information of the first layer;

and if the number of the nonzero coefficients included in the first layer is larger than the number of the nonzero coefficients correspondingly indicated by the nonzero coefficient position indication information of the first layer, ignoring the nonzero coefficients which do not correspond to the nonzero coefficient position indication information of the first layer in the nonzero coefficient information domain of the first layer.

In a possible implementation manner, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the terminal device by the communication device.

In a fifth aspect, an information transmission apparatus is provided, including:

the channel measurement unit is used for carrying out channel measurement to obtain CSI, wherein the CSI comprises at least one layer of nonzero coefficient set and nonzero coefficient position indication information;

a discarding unit, configured to discard part of information in the CSI according to a CSI discarding rule; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate;

and the transmission unit is used for sending the CSI with the discarded part of information to the network equipment.

In a possible implementation manner, the discarding unit is configured to determine information related to a bit number to be discarded, and discard bits to be discarded in non-zero coefficient position indication information indicated by the information related to the bit number.

In a possible implementation manner, the transmission unit is further configured to send the information related to the bit number to the network device.

In a possible implementation manner, the discarding unit is configured to:

Determining non-zero coefficient position indication information needing to be discarded in the CSI according to the preset discarding rule, wherein the non-zero coefficient position indication information needing to be discarded corresponds to a fourth number of non-zero coefficients;

when the fourth number is greater than or equal to the third number, discarding all non-zero coefficients corresponding to the non-zero coefficient position indication information to be discarded, and supplementing M coefficients with arbitrary values to report, wherein M is a difference between the fourth number and the third number; alternatively, the first and second liquid crystal display panels may be,

In a possible implementation manner, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the information transmission apparatus by the network device.

In a possible implementation manner, the discarding unit is further configured to discard at least one of the frequency-domain base indicator, the strongest coefficient index, and the reference amplitude coefficient of a layer of the CSI when all the non-zero coefficient position indication information of the layer is discarded.

A sixth aspect provides an information transmission apparatus comprising:

the transmission unit is used for receiving the CSI sent by the terminal equipment;

a determining unit, configured to determine that part of information in the CSI is discarded;

a decoding unit, configured to decode the CSI according to a CSI discard rule adopted by the terminal device; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding the non-zero coefficient in the CSI according to a preset threshold or a preset code rate.

In one possible implementation, the CSI includes a first part of CSI or a first part of CSI and a second part of CSI, where the first part of CSI includes RI and total number indication information of non-zero coefficients of all layers, and the second part of CSI includes all or part of non-zero coefficients of at least one layer and non-zero coefficient position indication information; the decoding unit is configured to:

In a possible implementation manner, the decoding unit is configured to:

In a possible implementation manner, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the terminal device by the information transmission apparatus.

In a seventh aspect, there is provided an information transmission system comprising the communication device in the third aspect capable of performing the steps of the information transmission method as performed by the terminal device in the first aspect, and the communication device in the fourth aspect capable of performing the steps of the information transmission method as performed by the network device in the second aspect.

In an eighth aspect, there is provided an information transmission system including the information transmission apparatus in the fifth aspect capable of executing the steps of the information transmission method as performed by the terminal device in the first aspect and the information transmission apparatus in the sixth aspect capable of executing the steps of the information transmission method as performed by the network device in the second aspect.

In a ninth aspect, a computer-readable storage medium is provided, which stores computer-executable instructions for causing a computer to perform the steps included in any one of the information transmission methods in the first aspect.

In a tenth aspect, a computer-readable storage medium is provided, which stores computer-executable instructions for causing a computer to perform the steps included in any one of the information transmission methods in the second aspect.

In an eleventh aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the information transmission methods of the first aspect described above.

In a twelfth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the information transmission methods of the second aspect described above.

In the embodiment of the application, when the terminal device performs CSI feedback, part of information in the CSI is discarded according to the CSI discard rule, and the CSI with the discarded part of information is sent to the network device. The CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule and discarding the non-zero coefficient in the CSI according to a preset threshold or a preset code rate, so that the CSI reported by the terminal equipment meets the requirement of uplink resources allocated to the terminal equipment.

Especially, when the embodiment of the present application is applied to an NR Rel-16 system, when the cost of CSI to be reported exceeds the uplink resource allocated to the terminal device by the network side, the embodiment of the present application is adopted to discard part of CSI information and report the discarded CSI information, so that the reported CSI can be correctly decoded, thereby ensuring the reliability of the system and improving the system performance.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of an application scenario in an embodiment of the present application;

fig. 2 is a schematic flowchart of an information transmission method in an embodiment of the present application;

fig. 3 is a schematic diagram of one way of discarding part of information in CSI in the embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device in an embodiment of the present application;

fig. 5 is another schematic structural diagram of a communication device in the embodiment of the present application;

fig. 6 is a block diagram showing the structure of an information transmission apparatus according to an embodiment of the present application;

fig. 7 is another block diagram of the information transmission device in the embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the claimed protection. In the present application, the embodiments and features of the embodiments may be arbitrarily combined with each other without conflict. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

The terms "first" and "second" in the description and claims of the present application and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the term "comprises" and any variations thereof are intended to cover non-exclusive protection. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. The "plurality" in the present application may mean at least two, for example, two, three or more, and the embodiments of the present application are not limited.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the preceding and following related objects are in a "and/or" relationship, unless otherwise specified.

Before describing the embodiments of the present application, some terms in the present application will be explained to facilitate understanding for those skilled in the art.

1) Terminal equipment, including devices that provide voice and/or data connectivity to a user, may include, for example, handheld devices with wireless connection capability or processing devices connected to wireless modems. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchanging voice and/or data with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device communication (D2D) terminal device, a V2X terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (IoT) terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber state), a mobile station (mobile state), a remote station (remote state), an access point (access point, AP), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), or a user equipment (user device), etc. For example, mobile telephones (or so-called "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included mobile devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable smart device or intelligent wearable equipment etc. is the general term of using wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.

The various terminal devices described above, if located on a vehicle (e.g., placed in or installed in the vehicle), may be considered to be vehicle-mounted terminal devices, which are also referred to as on-board units (OBUs), for example.

In this embodiment, the terminal device may further include a relay (relay). Or, it is understood that any device capable of data communication with a base station may be considered a terminal device.

2) A network device may refer to a device in an access network that communicates over the air with a wireless terminal device through one or more cells. The network device may be a node in a radio access network, which may also be referred to as a base station, and may also be referred to as a Radio Access Network (RAN) node (or device). Examples of some network devices are currently: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In addition, in a network structure, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node. The structure separates the protocol layers of the eNB in a Long Term Evolution (LTE) system, the functions of part of the protocol layers are controlled in the CU in a centralized way, the functions of the rest part or all of the protocol layers are distributed in the DU, and the CU controls the DU in a centralized way.

Application scenarios of embodiments of the present application are described below.

Fig. 1 shows a schematic diagram of a possible application scenario according to an embodiment of the present application, where the application scenario includes a network device and a terminal device, where functions of the network device and the terminal device have been described in the foregoing, and are not described herein again. The terminal device is wirelessly connected with the network device, and data transmission can be performed between the terminal device and the network device, for example, data sent by the network device to the terminal device is called downlink transmission, and data sent by the terminal device to the network device is called uplink transmission. The application scenario shown in fig. 1 may be an application scenario in an NR system, or may be an application scenario in an LTE system, for example, if the application scenario shown in fig. 1 is an application scenario in an NR system, then the network device therein may be a gNB in the NR system, and the terminal device therein may be a terminal device in the NR system.

It should be noted that the scenario shown in fig. 1 should not limit the application scenario of the embodiment of the present application, and in an actual application, the scenario may include a plurality of network devices and a plurality of terminal devices. For example, one terminal device may perform data transmission only with one network device, or may perform data transmission with multiple network devices, or one network device may perform data transmission with one terminal device, or may perform data transmission with multiple terminal devices, that is, the number of the terminal devices and the number of the network devices in fig. 1 are only examples, and in practical applications, one network device may provide services for multiple terminal devices, which is not specifically limited in this embodiment of the present application.

In the NR Rel-16 system, a low-overhead Type II codebook is defined, the coefficient of each sub-band is compressed, and the compressed coefficient is fed back to a base station. Taking rank 1 as an example, the codebook can be expressed as shown in the following equation for all subbands:

wherein:

W₁the method comprises orthogonal combined beams, wherein the contained orthogonal combined beams are the same as a Type II codebook of a Rel-15 system.

Representing the compressed coefficient, where p_diff(i, j) represents a differential amplitude coefficient, q (i, j) represents a phase coefficient, p_refRepresenting a reference amplitude coefficient. If it is

Is located in the first polarization direction (i.e. the strongest amplitude coefficient of (b) is located in the first polarization direction

The first L rows) of the first row, the reference amplitude coefficient is located in the second polarization direction, as shown in the above expression; if it is

Is located in the second polarization direction (i.e. the strongest amplitude coefficient of (b) is located in the second polarization direction

The last L rows) of the array, the reference amplitude coefficient is located in the first polarization direction. The differential amplitude coefficient, the phase coefficient and the reference amplitude coefficient are all required to be fed back to the base station. And the terminal also needs to report the position of the strongest amplitude coefficient. The differential amplitude coefficient corresponding to the strongest amplitude coefficient is defined as 1, and the phase coefficient corresponding to the strongest amplitude coefficient is defined as 0, so that the differential amplitude coefficient and the phase coefficient corresponding to the strongest amplitude coefficient do not need to be reported. In addition, each layer allows for further savings in feedback overhead

The compression coefficients in (1) do not need to be reported completely, and only the nonzero coefficients in (1) can be reported. For Rank 1 and Rank 2, the base station configures the upper limit of the number of nonzero coefficients reported by each layer to be K0. Because all compression coefficients do not need to be reported, reporting needs to be indicated for each layerThe position of the non-zero coefficient.

W_fRepresenting compressed basis vectors, comprising M basis vectors, each of length N₃，N₃Determined by the number of CQI subbands configured by the system.

Taking rank 2 as an example, the Type II codebook in the NR Rel-16 system has the first layer precoding expressed as follows:

the second layer precoding is represented by the following equation:

wherein, W₁The method comprises the steps of including orthogonal combined beams, wherein the number of the included orthogonal beams is 2L; w_f,0A base vector, W, representing layer one_f,1A base vector, W, representing layer two_f,0And W_f,1Respectively comprises M base vectors;

represents the layer-one corresponding compressed coefficients,

representing the compressed coefficients corresponding to layer two,

and

each of which contains 2L x M coefficients.

In other cases of rank, the expression of the Type II codebook in the NR Rel-16 system may be derived by referring to the expression of rank ═ 2, which is not described herein again.

According to the codebook structure, when the terminal reports the CSI, the CSI cost has larger difference corresponding to different RI values. If rank is 1, reporting K0 non-zero coefficients at most, and reporting position indication information (for example, using a bitmap indication) of the K0 non-zero coefficients at most; when rank is 2, report 2 × K0 non-zero coefficients at most, and report the position indication information of the non-zero coefficients of each layer (each layer uses a bitmap indication). Thus, the PMI overhead when Rank 2 is close to twice that when Rank 1. Because the base station cannot predict the RI value fed back by the terminal, if the uplink resource is allocated according to the overhead of rank 1, and the terminal determines rank 2 and reports CSI according to the RI value, the overhead of the CSI to be reported exceeds the uplink resource allocated by the base station, so that part of PMI information needs to be discarded in the reported CSI, so as to ensure that network equipment (e.g., the base station) can correctly receive and decode the CSI reported by the terminal.

In view of this, an embodiment of the present application provides an information transmission method, and in particular, to a CSI transmission method, where in a case that uplink resources allocated to a terminal by a network device are not enough to feed back all information of CSI, the terminal device may discard part of information in the CSI and report the information, so as to ensure that the network device can correctly decode the CSI, thereby ensuring reliability of a system. By means of discarding part of the information of the CSI, even if the system obtains non-optimal channel characteristics (namely, complete CSI is not obtained), certain performance can be ensured to work, and the reliability of the system is improved as much as possible.

The embodiment of the application is applicable to a Rel-16 system and carries out CSI feedback based on the type II codebook structure. The embodiment of the application can be applied to the NR Rel-16 system or the evolution system thereof, or other systems needing to discard the CSI.

The codebook in the embodiment of the present application is a matrix, for example, the codebook is a precoding matrix.

The "beams," i.e., vectors, in the embodiments of the present application may be referred to as beam vectors or otherwise named.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the embodiment of the present application, a CSI discard rule may be predefined, and the CSI discard rule may be known to the terminal device and the network device. Different terminal devices may adopt the same CSI drop rule or different CSI drop rules, and no matter what CSI drop rule the terminal device adopts, the network device and the terminal device can know together.

The CSI discard rule is used to instruct a terminal device to discard part of information in CSI, and specifically, to discard non-zero coefficient position indication information and non-zero coefficients in CSI, for example, how many non-zero coefficients to discard may be defined, which layers of non-zero coefficients to discard may also be defined, which layers of non-zero coefficient position indication information to discard may also be defined, and how many bits of non-zero coefficient position indication information to discard may be defined. The terminal equipment can discard part of information in the CSI according to the CSI discarding rule, so that the terminal equipment can meet the requirement of uplink resources allocated to the terminal equipment. And the network device can correctly decode the CSI reported by the terminal device and discarded with partial information according to the CSI discarding rule adopted by the terminal device.

Wherein the CSI discard rule may be specified for a one-time discard operation. When the terminal device discards the CSI, the terminal device may repeatedly perform the discarding operation for multiple times according to the CSI discarding rule until the requirement of the uplink resource is satisfied, or may determine all information to be discarded at one time and discard the information according to the CSI discarding rule and the uplink resource allocated to the terminal device, so as to satisfy the requirement of the uplink resource.

Specifically, the CSI discard rule is used to instruct to discard non-zero coefficient position indication information with a predetermined discard rule, and discard non-zero coefficients according to a predetermined threshold; or, the CSI discard rule is used to instruct to discard the nonzero coefficient position indication information with a predetermined discard rule, and discard the nonzero coefficient according to a predetermined code rate. That is to say, the partial information in the CSI discarded in the embodiment of the present application includes both the nonzero-coefficient position indication information and the nonzero coefficient, and may be configured between the discarded amount corresponding to the nonzero-coefficient position indication information and the discarded number of the nonzero coefficient, so as to ensure that the CSI discarded with the partial information can meet the uplink resource requirement allocated by the network side, and also ensure that the information in the CSI can be reported to the network side as much as possible, so that the network device can correctly decode the CSI reported by the terminal device, and can acquire as much information as possible.

Referring to fig. 2, which is a flowchart of an information transmission method provided in an embodiment of the present application, the flowchart shown in fig. 2 is described as follows.

Step 201: and the terminal equipment carries out channel measurement to obtain CSI.

Wherein the CSI comprises a non-zero coefficient set of at least one layer and non-zero coefficient position indication information. In specific implementation, according to the value of the RI determined by the terminal device, the CSI may include feedback information of a corresponding layer. For example, if RI is 2, the CSI includes a nonzero coefficient set and nonzero coefficient position indication sequence (bitmap) information corresponding to each of the layer one and the layer two, and if RI is 3, the CSI includes a nonzero coefficient set and nonzero coefficient position indication sequence (bitmap) corresponding to each of the layer one, the layer two, and the layer three.

The non-zero coefficient set of a layer may include a non-zero amplitude coefficient set and a non-zero phase coefficient set of the layer, where the non-zero amplitude coefficient set includes a differential amplitude coefficient and a reference amplitude coefficient.

All information of the CSI can be reported in two parts, that is, the CSI may include a first part of the CSI and a second part of the CSI. The first part of the CSI comprises total number indication information of nonzero coefficients of all layers, and the second part of the CSI comprises the nonzero coefficients and nonzero coefficient position indication information which correspond to all the layers respectively.

Specifically, for full CSI, the first part of CSI may include the following information:

RI；

a wideband CQI;

differential CQI, if a plurality of sub-bands exist, each sub-band corresponds to one differential CQI;

a total number of non-zero coefficients indicating a sum of the numbers of non-zero coefficients of all layers.

For full CSI, the second part of the CSI may comprise for each layer respective specific information. Taking the ith layer as an example, the information of the ith layer in the second part of CSI may include:

the frequency domain base indication of the ith layer indicates the frequency domain base vector used for constructing the precoding matrix of the layer;

the non-zero coefficient position indication information of the ith layer indicates the position of the non-zero coefficient of the layer in a coefficient matrix corresponding to the layer for constructing a precoding matrix;

the strongest coefficient index of the ith layer indicates the position of the strongest amplitude coefficient of the ith layer in a coefficient matrix corresponding to the ith layer for constructing a precoding matrix;

a reference amplitude coefficient for the ith layer;

the differential amplitude coefficient of the ith layer;

phase amplitude coefficient of the ith layer.

For layer one, in the second part of CSI, the information corresponding to layer one may further include a spatial base indicator and a twiddle factor indicator.

Step 202: and the terminal equipment discards part of information in the CSI according to the CSI discarding rule.

Optionally, the first part of the CSI is not discarded, and part or all of the information in the second part of the CSI may be discarded. Specifically, in some embodiments, the discarded partial CSI information includes some or all of the non-zero coefficients of at least one layer in the CSI, and some or all of the non-zero coefficient position indication information of at least one layer.

In the embodiment of the present application, the CSI discard rule is used to instruct discarding the non-zero coefficient position indication information in the CSI by using a predetermined discard rule, and discarding the non-zero coefficient in the CSI according to a predetermined threshold or a predetermined code rate, that is, the terminal device discards the non-zero coefficient position indication information in the CSI according to the predetermined discard rule, and discards the non-zero coefficient in the CSI according to the predetermined threshold or the predetermined code rate.

The predetermined threshold may refer to a maximum overhead of an uplink resource allocated by the network side for the terminal device to transmit the CSI, that is, the terminal device may only occupy the uplink resource less than or equal to the predetermined threshold to transmit the CSI. In a specific implementation process, uplink resources configured by the network side for each terminal device may be different, and uplink resources configured by the network side for the same terminal device at different times may also be different, so that the predetermined threshold is determined for a process in which one terminal device reports CSI at a single time, that is, the predetermined thresholds when reporting CSI at different times may be different. Certainly, in some other embodiments, the predetermined threshold may also be fixed and unchanged in each CSI reporting process, and the embodiments of the present application are not limited.

The predetermined code rate is a code rate used when the terminal device transmits the CSI on the uplink resource allocated by the network device, and determines the reliability of CSI transmission.

In one possible embodiment, the predetermined threshold is related to the CSI overhead when rank is 1 (i.e., RI is 1), i.e., the predetermined threshold may be determined according to the CSI overhead when rank is 1. Because the CSI overhead required for rank-1 is the minimum relative to the CSI overhead when rank takes other values, and is also the minimum uplink resource that can be allocated by the system, it is reasonable to use it as the predefined threshold. In addition, the predetermined code rate may be defined by the system, which guarantees minimum requirements for reliability of CSI transmission.

Some specific embodiments of the terminal device discarding partial information based on the CSI discard rule are described below.

First mode

When the non-zero coefficient position indication information is discarded according to the predetermined discarding rule, the terminal device may discard the non-zero coefficient position indication information in the CSI according to the predetermined granularity.

In an alternative embodiment, the predetermined granularity may be a part or all of the non-zero coefficient position indication information of a layer. For example, the predetermined granularity may be all bits of a non-zero coefficient position indication sequence (bitmap) of a layer, i.e. the predetermined discard rule for non-zero coefficient position indication information specifies to discard a non-zero coefficient position indication sequence (bitmap) of a layer at a time. As another example, the predetermined granularity may be half the number of bits of a non-zero coefficient position indication sequence (bitmap) of a layer, i.e., the predetermined discard rule for non-zero coefficient position indication information specifies to discard half the number of bits of a non-zero coefficient position indication sequence (bitmap) of a layer at a time. Specifically, bits at which positions are discarded and bits at which positions are reserved may be specified by a predetermined discarding rule or agreed by a system, which is not limited in the embodiment of the present application.

In another alternative embodiment, the predetermined granularity is a portion or all of the non-zero coefficient position indication information for each of the at least two layers. For example, the predetermined granularity is half of the number of bits of the non-zero coefficient position indication sequence (bitmap) of each layer, that is, the predetermined discarding rule for the non-zero coefficient position indication information provides for discarding half of the number of bits of the non-zero coefficient position indication sequence (bitmap) of each layer at a time. Specifically, bits at which positions are discarded and bits at which positions are reserved may be specified by a predetermined discarding rule or may be agreed by a system, which is not limited in the embodiment of the present application.

The predetermined granularity may be predetermined by the network device and the terminal device, or may be dynamically notified by the network device, or may be notified to the network device after being determined by the terminal device itself, which is not limited in the embodiment of the present application.

Second mode

When discarding the non-zero coefficient position indication information according to the predetermined discarding rule, the terminal device may determine bit number related information to be discarded, where the bit number related information is used to indicate bits that need to be discarded in the non-zero coefficient position indication information, and further, the terminal device may discard bits that need to be discarded in the non-zero coefficient position indication information indicated by the determined bit number related information.

That is to say, for the nonzero coefficient position indication information, the terminal device may autonomously determine the bits that need to be discarded, and the bit number related information includes the number of bits and/or the bit position, and further, the terminal device may discard the nonzero coefficient position indication information carried on the bits indicated by the bit number related information. Further, in order to realize cognitive unification between the terminal side and the network side so that the network side can correctly decode the CSI with the partial information discarded, the terminal device may send the information related to the bit number to the network device after discarding the non-zero coefficient position indication information indicated by the information related to the bit number.

In a possible implementation manner, the bit number related information in the embodiment of the present application includes a specific bit number, or may include a specific bit position. In another possible implementation, the bit number related information in the embodiment of the present application may be a number indication of frequency domain basis vectors, which determines a bit number of the reported nonzero coefficient position indication information, and further determines a bit number of the reported CSI.

Third mode

In a possible implementation manner, the terminal device determines the number of non-zero coefficients that need to be discarded according to the discarded non-zero coefficient position indication information and a predetermined threshold (or a predetermined code rate), for example, if the determined number of non-zero coefficients is a first number, the first number of non-zero coefficients may be discarded.

In another possible implementation, the terminal device determines, according to the discarded non-zero coefficient and a predetermined threshold (or a predetermined code rate), non-zero coefficient position indication information that needs to be discarded, and discards the determined non-zero coefficient position indication information that needs to be discarded.

In another possible implementation, the terminal device determines, according to a predetermined threshold (predetermined code rate), the position indication information of the non-zero coefficients that need to be discarded and the number (for example, a second number) of the non-zero coefficients that need to be discarded, and discards the determined position indication information of the non-zero coefficients that need to be discarded and the non-zero coefficients of the second number at the same time.

In the above embodiment, no matter what implementation is adopted to discard the non-zero coefficient position indication information and the non-zero number, the CSI discarded with the partial information needs to satisfy the requirement of the predetermined threshold (or the predetermined code rate).

Fourth mode

Referring to fig. 3, fig. 3 exemplarily shows a flow for discarding CSI provided in an embodiment of the present application, and the flow shown in fig. 3 is described as follows.

Step 301: the terminal device determines the number of nonzero coefficients to be discarded in the CSI according to a predetermined threshold or a predetermined code rate, for example, the determined nonzero coefficients to be discarded are a third number, and the third number is represented by T.

Step 302: the terminal device determines, according to a predetermined discarding rule, non-zero coefficient position indication information that needs to be discarded in the CSI, where for example, the number of non-zero coefficients indicated by the determined non-zero coefficient position indication information that needs to be discarded is a fourth number, and the fourth number is represented by S.

Step 303: and judging the magnitude relation between the third number T and the fourth number S, for example, judging whether the fourth number S is smaller than the third number T, and continuing the subsequent operation according to the judgment result.

In the implementation process, if S < T, step 304 is continued, and if S ≧ T, step 305 or step 306 is executed.

Step 304: if the fourth number is smaller than the third number, that is, S is smaller than T, the terminal device discards all non-zero coefficients corresponding to the non-zero coefficient position indication information that needs to be discarded, discards N non-zero coefficients in all non-zero coefficients corresponding to the non-discarded non-zero coefficient position indication information, and updates the non-zero position indication information corresponding to the N non-zero coefficients to zero coefficient indication.

Where N is the difference between the third number and the fourth number, i.e., N ═ T-S, so that N is a positive integer, i.e., N is an integer greater than or equal to 1.

Step 305: if the fourth number is determined to be not less than the third number, that is, the fourth number is greater than or equal to the third number, that is, S is greater than or equal to T, the terminal device discards all nonzero coefficients corresponding to the nonzero coefficient position indication information to be discarded, and supplements M coefficients with arbitrary values for reporting.

In the embodiment of the present application, M is the difference between the fourth number and the third number, i.e., M is S-T, and therefore M is zero or a positive integer. And M coefficients of arbitrary value include non-zero coefficients and zero coefficients, and arbitrary values are, for example, 0, 1, 2, etc.

Step 306: if the fourth number is determined to be not less than the third number, that is, the fourth number is greater than or equal to the third number, that is, S is greater than or equal to T, the terminal device discards the non-zero coefficients of the third number in all the non-zero coefficients corresponding to the non-zero coefficient position indication information that needs to be discarded, that is, T non-zero coefficients in all the non-zero coefficients corresponding to the non-zero coefficient position indication information that needs to be discarded.

In the embodiment of the application, the corresponding relation between the non-zero coefficient position indication information and the non-zero coefficient is ensured, and further the accuracy of the channel information and certain system performance are ensured.

In this embodiment of the present application, the predetermined discarding rule for discarding the non-zero coefficient position indication information, and the predetermined threshold and the predetermined code rate for discarding the non-zero coefficient are determined by the terminal device according to the uplink resource allocated to the terminal device by the network side, that is, according to the uplink resource allocated by the network side, a trade-off may be performed between the non-zero coefficient position indication information and the discard share of the non-zero coefficient, for example, the non-zero coefficient position indication information of which layers and bits need to be discarded, and how many non-zero coefficients need to be discarded.

In the embodiment of the present application, when CSI is partially discarded, non-zero coefficient position indication information and a non-zero coefficient may be discarded at the same time, because these two parts of information are main parts affecting CSI overhead, these two parts of information may be selected to be discarded preferentially, and the discarded amount of the non-zero coefficient position indication information and the discarded number of the non-zero coefficients may be configured flexibly according to the requirement of uplink resources.

In another possible embodiment, with the above-described discarding manner, the non-zero coefficient position indication information in a certain layer or each of several layers in the CSI may all be discarded, for example, for any ith layer in the CSI, if the non-zero coefficient position indication information in the ith layer is discarded completely, the codebook parameters of the ith layer cannot be used, and in order to reduce invalid transmission, other codebook parameters of the ith layer may also be discarded, for example, the frequency-domain base indication, the strongest coefficient index, and the reference amplitude coefficient in the ith layer may all be discarded.

Step 203: the terminal equipment sends the CSI with part of information discarded to the network equipment.

After discarding part of information in the CSI by using the CSI discard rule, the terminal device may report the CSI discarded with part of information to the network side.

Step 204: after receiving the CSI sent by the terminal device, the network device may determine whether part of the received CSI is discarded.

In the specific implementation process, the CSI reported by the terminal device each time may adopt the CSI discard rule to partially discard the CSI, or may not discard the CSI but report the CSI completely, so that the network device may first determine whether the CSI received this time is discarded after receiving the CSI reported by the terminal device, and then adopt a corresponding decoding method to perform correct decoding. For example, if the network device determines that the CSI received this time is partially discarded, then according to the knowledge that the terminal device discards based on CSI, the network device may correspondingly decode using the CSI discarding rule of the terminal device, that is, perform step 205 to ensure correct decoding of CSI; if it is determined that the CSI received this time is not partially discarded, the conventional decoding method may be adopted for decoding, that is, step 206 is executed.

In the specific implementation process, the network device may determine whether the CSI reported by the terminal device discards part of the information according to the CSI reported by the terminal device and the uplink resource allocated to the terminal device.

The first part of the CSI generally is not discarded, where the first part of the CSI includes RI (the value of RI is equal to the number of layers) and total number of nonzero coefficients of all layers indicating information, and in the second part of the CSI, the number of bits of the frequency domain base indication field, the nonzero coefficient position indication information field, and the strongest coefficient index information field in each layer is fixed, so that the network device may determine the number of bits occupied by the nonzero coefficients in all layers according to the total number of nonzero coefficients of all layers indicated by the first part of the CSI, and may further determine the number of bits of the complete CSI (the complete CSI refers to the CSI that is not discarded), that is, may determine the resource overhead of the complete CSI. If the resource overhead of the CSI distributed in the uplink resources is less than the determined resource overhead of the complete CSI, the distributed uplink resources are not enough to enable the terminal equipment to transmit the CSI, and the CSI is discarded by the terminal equipment, namely part of information in the CSI is discarded.

Step 205: and the network equipment decodes the CSI discarded with partial information according to the CSI discarding rule adopted by the terminal equipment.

Since the CSI discard rule is known between the network device and the terminal device, the network device may perform corresponding decoding according to the CSI discard rule adopted by the terminal device when performing decoding specifically, and for the description of the CSI discard rule, reference may be made to the foregoing embodiment, and for brevity of the text, the description is not repeated here.

Specifically, the network device may determine, according to the first part of the CSI and/or the CSI discard rule adopted by the terminal device, an information field included in the second part of the CSI (that is, an information field of which layers the second part of the CSI includes, or which information fields a layer includes, or a number of bits occupied by an information field), and then decode the second part of the CSI according to the information field of the second part of the CSI and the CSI discard rule adopted by the terminal device.

For example, in the CSI discard rule adopted by the terminal, a predetermined discard rule for the nonzero coefficient position indication information specifies a position indication sequence (bitmap) for discarding one layer of nonzero coefficients at a time, and determines to discard K nonzero coefficients according to a predetermined threshold or a predetermined code rate, if RI in the first part of the CSI reported by the terminal is 2, the base station may determine, according to the CSI discard rule, that a nonzero position indication sequence (bitmap) field of the layer two is not included in the second part of the CSI, and the number of nonzero coefficients included in the nonzero coefficient information field of the layer two is reduced by K compared with a normal case (i.e., a case where a discard operation is not performed).

For another example, among CSI discard rules adopted by the terminal, a predetermined discard rule for the nonzero coefficient position indication information specifies: for a non-zero coefficient position indication sequence (bitmap), discarding half bits in the bitmap of the non-zero coefficient position indication sequence of each layer including all layers at a time, and determining to discard Q non-zero coefficients at a time according to a predetermined threshold or a predetermined code rate. If RI in the first part of the CSI reported by the terminal is 2, the base station may determine, according to the CSI discard rule, that the second part of the CSI includes information fields of a layer one and a layer two, but the length of a non-zero position indication sequence (bitmap) field of the layer one and the layer two is reduced by half compared with a normal length (i.e., the length without the discard operation), and the number of non-zero coefficients included in the non-zero coefficient information fields of the layer one and the layer two is reduced by Q compared with the number in the normal case (i.e., without the discard operation).

In one possible implementation, when decoding the CSI in which the partial information is discarded, the network device may determine, for any layer (e.g., represented by an ith layer) in the second part of the CSI, the number of nonzero coefficients included in the ith layer (e.g., represented by K), and may determine the number of nonzero coefficients correspondingly indicated by the nonzero coefficient position indication information of the ith layer (e.g., represented by P). Further, the network device may compare K with P, and use a corresponding decoding manner according to a difference of comparison results.

If K > P is determined, it indicates that the non-zero coefficient information field of the i-th layer contains redundant non-zero coefficients, which may be supplemented to meet the requirement of the number of non-zero coefficients specified by the CSI discard rule when the terminal performs CSI discard, so that the network device may ignore the non-zero coefficients in the non-zero coefficient information field of the i-th layer that do not correspond to the non-zero coefficient position indication information of the i-th layer (i.e., the redundant non-zero coefficients in the non-zero coefficient field of the i-th layer), that is, do not perform decoding or directly discard the non-zero coefficients or discard the non-zero coefficients as invalid contents after decoding.

If it is determined that K is P, all the non-zero coefficients in the non-zero coefficient information field of the i-th layer are decoded.

Wherein the non-zero coefficient information field may include a differential amplitude coefficient information field and a phase coefficient information field.

Step 206: the network device conventionally decodes the CSI of the non-discarded partial information.

As mentioned above, if the network device determines that the received CSI is complete CSI without discarding part of information, the network device may correspondingly decode the CSI by using the existing decoding method, which is not described herein.

Specific examples of several scenarios are given below, and are described below, according to one or a combination of the above embodiments of the present application.

Example 1

The precoding matrix uses the same 2L beams (spatial basis) for each layer according to the definition of the Type II codebook. For layer i, M is used_iThe frequency domain basis vectors form a set of compressed basis vectors. Maximum reported K0 ═ 2L × M per layer₁And 2K0 non-zero coefficients are reported by all layers at most.

For the Type II codebook of layer i, its precoding is expressed as:

wherein, W₁Includes 2L space-domain basis vectors, W_f,iComprising M_iA number of frequency-domain basis vectors,

comprising 2L M_iA coefficient of the number of the elements.

If the terminal device determines that RI is 3, the determined complete CSI information is as follows:

the first part of CSI reporting comprises:

wherein, K_NZ1Number of non-zero coefficients, K, representing layer one_NZ2Number of non-zero coefficients, K, representing layer two_NZ3Indicating the number of non-zero coefficients for layer three. And N is_sb＝N₃。

The second part of the CSI, as shown below, comprises:

wherein the non-zero coefficient position indication for the i-th layer (any one of the second part of the CSI) employs a size of 2LM_iThe bitmap of the bit indicates.

When the uplink channel resources allocated by the network device are insufficient, for example: the uplink channel resources allocated by the network equipment to the terminal equipment are H bits in total, and the CSI to be fed back by the terminal equipment needs to occupy C bits, and C is larger than or equal to H, so that the terminal equipment needs to discard the CSI when feeding back the CSI. The CSI of the first part remains normally reported in the figure. In the second part, non-zero coefficient position indication information of one layer is discarded at a time according to the specification of a predetermined discard rule for the non-zero information position indication information in the CSI discard rule. In this embodiment, for example, the non-zero coefficient position indication for layer three is discarded first (total 2 LM) ₃Bits). Meanwhile, the terminal equipment determines the predetermined threshold as H bits, so that the non-zero coefficient which still needs to be discarded is C-2LM₃H bits, according to quantization of coefficients, e.g. C-2LM₃-H corresponds to Ks₁The overhead occupied by the individual non-zero coefficients (including the amplitude coefficient and the phase coefficient).

The terminal determines the number K of non-zero coefficients according to layer three_NZ3And Ks₁Determining the discarding mode of the non-zero coefficient according to the value relationship, specifically as follows:

1) if it isK_NZ3Ks is greater than or equal to₁In one way, K is_NZ3All non-zero coefficients are discarded. At this time, the number of the discarded non-zero coefficients exceeds Ks₁To ensure that only Ks is reduced₁When reporting a nonzero coefficient, K needs to be supplemented in the second part of the reported CSI_NZ3-Ks₁And the coefficients to ensure that the base station can decode according to the correct CSI load size. This supplemented K_NZ3-Ks₁Any value can be taken, and the method is not limited herein. Another way is to put K_NZ3Ks in (C)₁And discarding one nonzero coefficient, and still reporting the rest nonzero coefficients.

2) If K_NZ3Is less than Ks₁Then K is added_NZ3All non-zero coefficients are discarded. The number of the discarded non-zero coefficients does not reach Ks₁The Ks needs to be discarded again from the non-zero coefficients of some other layer₁-K_NZ3And (4) respectively. Meanwhile, in the non-zero coefficient position indication (bitmap) of the corresponding layer, the corresponding Ks ₁-K_NZ3The individual bit positions need to be changed from a non-zero coefficient indication to a zero coefficient indication. For example, Ks₁-K_NZ3When the number of the non-zero coefficients is 5, 5 non-zero coefficients of the layer two are discarded, and in the bitmap of the non-zero coefficient position indication information of the layer two, the bit value of the position of the 5 non-zero coefficients is changed from 1 to 0, so that the 5 positions have no non-zero coefficient to be reported.

When the terminal device discards the non-zero coefficient with a predetermined code rate, for example, the terminal device determines that the predetermined code rate of the system is p, the uplink channel resource x for transmitting the CSI needs to satisfy x · p ≦ H, and thus the non-zero coefficient still to be discarded is C-2LM₃H/p bits, and further, from the quantization of the coefficients, the C-2LM₃The overhead occupied by a specific number of non-zero coefficients (including amplitude coefficients and phase coefficients) for H/p. Further, the specific discarding operation may be performed in the same manner as the above discarding for the predetermined threshold, and for the sake of brevity, a description thereof will not be repeated.

Since the non-zero coefficient position indication information of one layer is completely discarded, the codebook parameters of the layer cannot be used, so that other parameters of the layer including frequency domain base indication, strongest coefficient index and reference amplitude coefficient can be discarded.

The network device may determine whether the CSI reported by the terminal device is discarded according to the CSI first part reported by the terminal device and the uplink resource allocated to the terminal device. And according to a CSI discarding rule predefined by the system, determining the size of the CSI second part reported by the terminal equipment and the specific information contained in the CSI second part, thereby carrying out correct decoding.

Example two

For the Type II codebook of layer i, its precoding is expressed as:

wherein, W₁In which 2L space-domain basis vectors, W_f,iComprising M_iA number of frequency-domain basis vectors,

comprising 2L M_iA coefficient.

the first part of CSI reporting comprises:

The second part of the CSI, as shown below, comprises:

Wherein the indication of the non-zero coefficient position for the i-th layer (any one of the second part of the CSI) takes a size of 2LM_iThe bitmap of the bit indicates.

When the uplink channel resources allocated by the network device are insufficient, for example: the uplink channel resources allocated by the network equipment to the terminal equipment are H bits in total, and the CSI to be fed back by the terminal equipment needs to occupy C bits, and C is larger than or equal to H, so that the terminal equipment needs to discard the CSI when feeding back the CSI. The CSI of the first part remains normally reported in the figure. In the second part, the CSI discard rule specifies a predetermined discard rule for the non-zero information position indication information, and first discards half of the non-zero coefficient position indication information per layer. I.e. layer one discard LM₁Bit map of bits, layer two discard LM₂Bit map of bits, layer three discard LM₃The bitmap of the bit. Meanwhile, the terminal equipment determines that the predetermined threshold is H bits, so that the nonzero coefficient which still needs to be discarded is C-LM₁-LM₂-LM₃H bits, according to quantization of coefficients, e.g. C-LM₁-LM₂-LM₃-H corresponds to Ks₂The overhead occupied by the individual non-zero coefficients (including the amplitude coefficient and the phase coefficient).

LM discarded by terminal equipment according to layer one, layer two, layer three₁、LM₂And LM₃The total number K of corresponding non-zero coefficient numbers in the bit _halfAnd Ks₂The discarding mode of the non-zero coefficient is determined as follows:

1) if K_halfKs is greater than or equal to₂In one way, K is_halfAll non-zero coefficients are discarded. At this time, the number of the discarded non-zero coefficients exceeds Ks₂To ensureOnly a reduction of Ks per discard₂When reporting a nonzero coefficient, K needs to be supplemented in the second part of the reported CSI_half-Ks₂And the coefficients to ensure that the base station can decode according to the correct CSI load size. This supplemented K_half-Ks₂Any value can be taken, and the method is not limited herein. Another way is to put K_halfKs in (C)₂And discarding one nonzero coefficient, and still reporting the rest nonzero coefficients.

2) If K_halfIs less than Ks₂Then K is added_halfAll non-zero coefficients are discarded. The number of the discarded non-zero coefficients does not reach Ks₂Determining Ks in the non-zero coefficients corresponding to the non-discarded non-zero coefficient position indications₂-K_halfThe non-zero coefficients are discarded. Meanwhile, in the non-zero coefficient position indication (bitmap), the corresponding Ks₂-K_halfThe individual bit positions need to be changed from a non-zero coefficient indication to a zero coefficient indication. For example, Ks₂-K_halfLM not discarded according to layer three when 5₃The bitmap of the bit indicates that 5 non-zero coefficients are selected for discarding. Meanwhile, in the non-discarded bitmap, the bit value of the position of the 5 nonzero coefficients is changed from 1 to 0, which indicates that no nonzero coefficient is reported in the 5 positions. Alternatively, LM's that are not discarded according to layer one, layer two and layer three ₁、LM₂And LM₃The bitmap of the bit indicates that 1 non-zero coefficient is selected in layer one, 2 non-zero coefficients are selected in layer two, and 2 non-zero coefficients are selected in layer three to be discarded. Correspondingly, in the respective non-discarded bitmap, the bit value of the position of the discarded non-zero coefficient is changed from 1 to 0, which indicates that no non-zero coefficient is reported in the corresponding position.

When the terminal device discards the non-zero coefficient with a predetermined code rate, for example, the terminal device determines that the predetermined code rate of the system is p, the uplink channel resource x for transmitting the CSI needs to satisfy x · p ≦ H, and thus the non-zero coefficient still to be discarded is C-LM₁-LM₂-LM₃-H/p bits, and further, from the quantization of the coefficients, C-LM can be determined₁-LM₂-LM₃The specific number of non-zero coefficients (including amplitude coefficient and phase coefficient) corresponding to H/pOverhead occupied. Further, the specific discarding operation may be performed in the same manner as the above discarding for the predetermined threshold, and for the sake of brevity, a description thereof will not be repeated.

Example three

The precoding matrix uses the same 2L beams (spatial basis) for each layer according to the definition of the Type II codebook. For layer i, use M_iThe frequency-domain basis vectors form a set of compressed basis vectors. Maximum reported K0 ═ 2L × M per layer₁And 2K0 non-zero coefficients are reported by all layers at most.

For the Type II codebook of layer i, its precoding is expressed as:

comprising 2L M_iA coefficient.

the first part of CSI reporting comprises:

wherein, K_NZ1Number of non-zero coefficients, K, representing layer one_NZ2Number of non-zero coefficients, K, representing layer two_NZ3Non-zero for presentation layer threeThe number of coefficients. And N is_sb＝N₃。

The second part of the CSI, as shown below, comprises:

When the uplink channel resources allocated by the network device are insufficient, for example: the uplink channel resources allocated by the network equipment to the terminal equipment are H bits in total, and the CSI to be fed back by the terminal equipment needs to occupy C bits, and C is larger than or equal to H, so that the terminal equipment needs to discard the CSI when feeding back the CSI. The CSI of the first part remains normally reported in the figure. In the second part, the non-zero coefficient position indication information of two layers is discarded at a time according to the provision of a predetermined discarding rule for the non-zero information position indication information in the CSI discarding rule. In this embodiment, for example, the non-zero coefficient position indications for layer two and layer three are discarded first (total 2 LM) ₂+2LM₃Bits). And simultaneously, the terminal equipment determines the overhead occupied by the CSI when the predetermined threshold is rank 1, which is represented as J bits, and J is less than or equal to H. Thus, the non-zero coefficients that still need to be discarded are C-2LM₂-2LM₃J bits, according to quantization of coefficients, e.g. C-2LM₂-2LM₃-J corresponds to Ks₃The overhead occupied by the individual non-zero coefficients (including the amplitude coefficient and the phase coefficient).

The terminal determines the number K of non-zero coefficients according to the layer two and the layer three_NZ2+K_NZ3And Ks₃Determining the discarding mode of the non-zero coefficient, as follows:

1) if K_NZ2+K_NZ3Ks is greater than or equal to₃One way is to combine K with_NZ2+K_NZ3All non-zero coefficients are discarded. This is achieved byThen, the number of the discarded non-zero coefficients exceeds Ks₃To ensure that only Ks is reduced₃For non-zero coefficient reporting, K needs to be supplemented in the CSI second part of the reporting_NZ2+K_NZ3-Ks₃And the coefficients to ensure that the base station can decode according to the correct CSI load size. This supplemented K_NZ2+K_NZ3-Ks₃Any value can be taken, and the method is not limited herein. Another way is to put K_NZ2+K_NZ3Ks in (C)₃And discarding one nonzero coefficient, and still reporting the rest nonzero coefficients.

2) If K_NZ2+K_NZ3Is less than Ks₃Then K is added_NZ2+K_NZ3All non-zero coefficients are discarded. The number of the discarded non-zero coefficients does not reach Ks₃Second, the non-zero coefficients of layer one need to be discarded again to the Ks₃-K_NZ2-K_NZ3And (4) respectively. Meanwhile, in the non-zero coefficient position indication (bitmap) of the corresponding layer, the corresponding Ks ₃-K_NZ2-K_NZ3The individual bit positions need to be changed from a non-zero coefficient indication to a zero coefficient indication. For example, Ks₃-K_NZ2-K_NZ3When the value is 5, 5 non-zero coefficients of layer one are discarded, and in the bitmap, the bit value of the position of the 5 non-zero coefficients is changed from 1 to 0. Indicating that these 5 positions have no non-zero coefficients to report.

When the terminal device discards the non-zero coefficient with a predetermined code rate, for example, the terminal device determines that the predetermined code rate of the system is p, the uplink channel resource x for transmitting the CSI needs to satisfy x · p ≦ H, and thus the non-zero coefficient still to be discarded is C-LM₁-LM₂-LM₃J/p bits, and further, from the quantization of the coefficients, the C-LM₁-LM₂-LM₃The overhead occupied by a specific number of non-zero coefficients (including amplitude coefficients and phase coefficients) for J/p. Further, the specific discarding operation may be performed in the same manner as the above discarding for the predetermined threshold, and for the sake of brevity, a description thereof will not be repeated.

Because the non-zero coefficient position indication information of the two layers, i.e. the layer two, the layer three and the layer three, is completely discarded, the codebook parameters of the two layers cannot be used, and thus other parameters of the two layers, including frequency domain base indication, strongest coefficient index and reference amplitude coefficient, can be discarded.

In the embodiment of the application, when the terminal device performs CSI feedback, part of information in CSI is discarded according to the CSI discard rule, and the discarded CSI is sent to the network device. The CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule and discarding the non-zero coefficient in the CSI according to a preset threshold or a preset code rate, so that the CSI reported by the terminal equipment meets the requirement of uplink resources allocated to the terminal equipment.

Based on the same inventive concept, an embodiment of the present application provides a communication device, which may be, for example, a terminal device described in the foregoing embodiment, and please refer to fig. 4, where the communication device in the embodiment of the present application includes a memory 401, a processor 402, a transceiver 403, and a user interface 404. The transceiver 403 is configured to implement communication between the communication device and other communication entities, for example, reporting CSI to a network device, the memory 401 is configured to store program instructions, and the processor 402 is configured to call the program instructions stored in the memory 401, and execute, according to the obtained program:

Performing channel measurement to obtain CSI, wherein the CSI comprises at least one layer of nonzero coefficient set and nonzero coefficient position indication information; discarding part of information in the CSI according to a CSI discarding rule; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate;

a transceiver 403, configured to send CSI with part of information discarded to the network device.

In one possible implementation, the processor 402 executes, in accordance with the obtained program:

discarding non-zero coefficient position indication information in the CSI according to the preset granularity; the predetermined granularity is a part or all of the non-zero coefficient position indication information of one layer, or the predetermined granularity is a part or all of the non-zero coefficient position indication information of each of at least two layers.

In one possible implementation, the processor 402 performs, in accordance with the obtained program:

and determining the bit number related information needing to be discarded, and discarding the bits needing to be discarded in the non-zero coefficient position indication information indicated by the bit number related information.

In one possible embodiment, the bit number related information comprises an indication of the number of frequency domain basis vectors.

In one possible implementation, the transceiver 403 is further configured to:

and sending the information related to the bit number to the network equipment.

determining a first number of non-zero coefficients needing to be discarded according to the discarded non-zero coefficient position indication information and a preset threshold or a preset code rate, and discarding the non-zero coefficients of the first number; alternatively, the first and second electrodes may be,

determining non-zero coefficient position indication information needing to be discarded according to the discarded non-zero coefficient and a preset threshold or a preset code rate, and discarding the non-zero coefficient position indication information needing to be discarded; alternatively, the first and second electrodes may be,

according to a preset threshold or a preset code rate, determining non-zero coefficient position indication information needing to be discarded and a second number of non-zero coefficients needing to be discarded, and discarding the non-zero coefficient position indication information needing to be discarded and the non-zero coefficients of the second number;

the overhead occupied by the CSI with the part of information discarded meets a preset threshold or a preset code rate.

Determining a third number of nonzero coefficients needing to be discarded in the CSI according to a preset threshold or a preset code rate;

determining non-zero coefficient position indication information needing to be discarded in the CSI according to a preset discarding rule, wherein the non-zero coefficient position indication information needing to be discarded corresponds to a fourth number of non-zero coefficients;

when the fourth number is smaller than the third number, all non-zero coefficients corresponding to the non-zero coefficient position indication information needing to be discarded are discarded, N non-zero coefficients in all non-zero coefficients corresponding to the non-discarded non-zero coefficient position indication information are discarded, and the non-zero position indication information corresponding to the N non-zero coefficients is updated to be zero coefficient indication, wherein N is the difference between the third number and the fourth number;

when the fourth number is greater than or equal to the third number, all nonzero coefficients corresponding to the nonzero coefficient position indication information needing to be discarded are discarded, and M coefficients with arbitrary values are supplemented to be reported, wherein M is the difference between the fourth number and the third number; alternatively, the first and second electrodes may be,

and when the fourth number is greater than or equal to the third number, discarding the non-zero coefficients of the third number in all the non-zero coefficients corresponding to the non-zero coefficient position indication information needing to be discarded.

In one possible implementation, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the communication device by the network device.

when the non-zero coefficient position indication information of one layer of the CSI is completely discarded, discarding at least one of the frequency domain base indication, the strongest coefficient index and the reference amplitude coefficient of the layer.

Where in fig. 4 the bus interface may comprise any number of interconnected buses and bridges, in particular one or more processors represented by processor 402 and various circuits of memory represented by memory 401, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 403 may be a number of elements including a transmitter and a receiver providing a means for communicating with various other apparatus over a transmission medium. For different communication devices, the user interface 404 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 402 is responsible for managing the bus architecture and general processing, and the memory 401 may store data used by the processor 182 in performing operations.

Alternatively, the processor 402 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD).

Based on the same inventive concept, an embodiment of the present application provides a communication device, which may be, for example, a network device described in the foregoing embodiment, please refer to fig. 5, and the communication device in the embodiment of the present application includes a memory 501, a processor 502, and a transceiver 503, where the transceiver 503 is configured to implement communication between the communication device and other communication entities, for example, to receive CSI sent by a terminal device, the memory 501 is configured to store program instructions, and the processor 502 is configured to call the program instructions stored in the memory 501, and execute, according to the obtained program:

determining that part of the information in the CSI sent by the terminal device and received by the transceiver 503 is discarded, and decoding the CSI according to a CSI discarding rule adopted by the terminal device; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and the non-zero coefficient in the CSI is discarded according to a preset threshold or a preset code rate.

In one possible implementation, the CSI includes a first part of CSI or includes the first part of CSI and a second part of CSI, where the first part of CSI includes RI and total number indication information of non-zero coefficients of all layers, and the second part of CSI includes all or part of non-zero coefficients of at least one layer and non-zero coefficient position indication information; the processor 502 executes, in accordance with the obtained program:

determining an information field contained in the second part of the CSI according to the first part of the CSI and/or the CSI discarding rule; and decoding the second part of the CSI according to an information field contained in the second part of the CSI and a CSI discarding rule.

In one possible implementation, the processor 502 executes, in accordance with the obtained program:

determining the number of nonzero coefficients included in a first layer in a second part in the CSI; wherein the first layer is one of all layers contained in the CSI;

In one possible implementation, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the terminal device by the communication device.

Wherein in fig. 5 the bus interface may comprise any number of interconnected buses and bridges, in particular one or more processors represented by processor 192 and various circuits of memory represented by memory 501, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 503 may be a plurality of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium.

The processor 502 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 5022 in performing operations.

Alternatively, the processor 502 may be a CPU, ASIC, FPGA or CPLD, among others.

Based on the same inventive concept, embodiments of the present application provide an information transmission apparatus, which may be, for example, the terminal device described in the foregoing embodiments, and the information transmission apparatus may be implemented by a chip system, and the chip system may be formed by a chip, and may also include a chip and other discrete devices. Referring to fig. 6, an information transmission apparatus in the embodiment of the present application includes a channel measurement unit 601, a discarding unit 602, and a transmission unit 603, where:

A channel measurement unit 601, configured to perform channel measurement to obtain channel state information CSI, where the CSI includes at least one layer of nonzero coefficient set and nonzero coefficient position indication information;

a discarding unit 602, configured to discard part of information in the CSI according to a CSI discarding rule; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule and discarding the non-zero coefficient in the CSI according to a preset threshold or a preset code rate;

a transmission unit 603, configured to send the CSI with part of the information discarded to the network device.

In a possible implementation manner, the discarding unit 602 is configured to determine information related to a number of bits to be discarded, and discard bits to be discarded in the non-zero coefficient position indication information indicated by the information related to the number of bits.

In a possible implementation manner, the transmission unit 603 is further configured to send information related to the bit number to the network device.

In one possible implementation, the discarding unit 602 is configured to:

determining a third number of non-zero coefficients needing to be discarded in the CSI according to a preset threshold or a preset code rate;

In one possible embodiment, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the information transmission apparatus by the network device.

In a possible embodiment, the discarding unit 602 is further configured to discard at least one of the frequency-domain base indication, the strongest coefficient index, and the reference amplitude coefficient of a layer of CSI when all the non-zero coefficient position indication information of the layer is discarded.

All relevant contents of each step executed by the terminal device related to the embodiment of the information transmission method may be cited to the functional description of the functional module corresponding to the information transmission apparatus in the embodiment of the present application, and are not described herein again.

Based on the same inventive concept, embodiments of the present application provide an information transmission apparatus, which may be, for example, the terminal device described in the foregoing embodiments, and the information transmission apparatus may be implemented by a chip system, and the chip system may be formed by a chip, and may also include a chip and other discrete devices. Referring to fig. 7, an information transmission apparatus in this embodiment of the present application includes a transmission unit 701, a determination unit 702, and a decoding unit 703, where:

a transmission unit 701, configured to receive channel state information CSI sent by a terminal device;

a determining unit 702, configured to determine that part of information in the CSI is discarded;

a decoding unit 703, configured to decode CSI according to a CSI discard rule adopted by the terminal device; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding the non-zero coefficient in the CSI according to a preset threshold or a preset code rate.

In one possible implementation, the CSI includes a first part of CSI or includes the first part of CSI and a second part of CSI, where the first part of CSI includes RI and total number indication information of non-zero coefficients of all layers, and the second part of CSI includes all or part of non-zero coefficients of at least one layer and non-zero coefficient position indication information; the decoding unit 703 is configured to:

Determining an information field contained in the second part of the CSI according to the first part of the CSI and/or a CSI discarding rule;

and decoding the second part of the CSI according to the information field contained in the second part of the CSI and the CSI discarding rule.

In one possible implementation, the decoding unit 703 is configured to:

determining the number of nonzero coefficients included in a first layer in a second part in the CSI; wherein, the first layer is one of all layers contained in the CSI;

In one possible embodiment, the predetermined threshold is determined according to CSI overhead when rank is 1, or the predetermined threshold is determined according to uplink resources allocated to the terminal device by the information transmission apparatus.

All relevant contents of each step executed by the network device related to the embodiment of the information transmission method may be cited in the description of the function module corresponding to the information transmission apparatus in the embodiment of the present application, and are not described herein again.

The division of the units in the embodiments of the present application is schematic, and only one logic function division is used, and there may be another division manner in actual implementation, and in addition, each functional unit in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more units. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Based on the same inventive concept, embodiments of the present application also provide an information transmission system, which may include a communication device as shown in fig. 4 and a communication device as shown in fig. 5, or may include an information transmission apparatus as shown in fig. 6 and an information transmission apparatus as shown in fig. 6.

Based on the same inventive concept, embodiments of the present application further provide a computer-readable storage medium, which stores computer instructions that, when executed on a computer, cause the computer to perform the steps of the information transmission method as described above.

Based on the same inventive concept, the embodiment of the present application further provides a chip system, where the chip system includes a processor and may further include a memory, and is used to implement the steps of the foregoing information transmission method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In some possible implementations, various aspects of the information transmission method provided in the embodiments of the present application may also be implemented in the form of a program product including program code for causing a computer to perform the steps of the information transmission method according to the various exemplary implementations of the present application described above when the program product runs on the computer.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. An information transmission method, characterized in that the method comprises:

the method comprises the steps that terminal equipment carries out channel measurement to obtain Channel State Information (CSI), wherein the CSI comprises at least one layer of nonzero coefficient set and nonzero coefficient position indication information;

the terminal equipment sends the CSI with part of information discarded to network equipment;

wherein the discarding part of information in the CSI includes:

when the fourth number is greater than or equal to the third number, the terminal device discards all non-zero coefficients corresponding to the non-zero coefficient position indication information to be discarded, and supplements M coefficient reports with any values, wherein M is the difference between the fourth number and the third number; alternatively, the first and second electrodes may be,

and when the fourth number is greater than or equal to the third number, the terminal device discards the non-zero coefficients of the third number in all the non-zero coefficients corresponding to the non-zero coefficient position indication information which needs to be discarded.

2. The method of claim 1, wherein the discarding part of the information in the CSI comprises:

3. The method of claim 1, wherein the discarding part of the information in the CSI comprises:

4. The method of claim 3, wherein the bit number-related information includes an indication of a number of frequency-domain basis vectors.

5. The method of claim 3, wherein the method further comprises:

6. The method of claim 1, wherein the discarding part of the information in the CSI comprises:

7. The method according to any of claims 1-6, wherein the predetermined threshold is determined according to CSI overhead when rank-1 or the predetermined threshold is determined according to uplink resources allocated to the terminal device by the network device.

8. The method of any of claims 1-6, further comprising:

9. An information transmission method, characterized in that the method comprises:

the network equipment determines that part of information in the CSI is discarded, and decodes the CSI according to a CSI discarding rule adopted by the terminal equipment; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate;

the CSI is obtained by the terminal device discarding the partial information by using the following method:

10. The method of claim 9, wherein the CSI comprises a first part of CSI comprising a rank indication, RI, and total number of non-zero coefficients for all layers indicating information, or comprises a first part of CSI comprising a rank indication, RI, and a second part of CSI comprising all or part of non-zero coefficients for at least one layer and non-zero coefficient position indicating information;

11. The method of claim 10, wherein the decoding the second portion of the CSI comprises:

12. The method according to any of claims 9-11, wherein the predetermined threshold is determined according to CSI overhead when rank-1 or the predetermined threshold is determined according to uplink resources allocated to the terminal device by the network device.

13. A communication device, comprising:

a memory for storing program instructions;

performing channel measurement to obtain Channel State Information (CSI), wherein the CSI comprises at least one layer of nonzero coefficient set and nonzero coefficient position indication information; according to a CSI discarding rule, discarding part of information in the CSI; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate;

the processor executes according to the obtained program:

when the fourth number is greater than or equal to the third number, discarding all non-zero coefficients corresponding to the non-zero coefficient position indication information to be discarded, and supplementing M coefficients with any values to report, wherein M is the difference between the fourth number and the third number; alternatively, the first and second liquid crystal display panels may be,

when the fourth number is greater than or equal to the third number, discarding the non-zero coefficient of the third number in all the non-zero coefficients corresponding to the non-zero coefficient position indication information needing to be discarded;

and a transceiver for transmitting the CSI with the part of information discarded to the network device.

14. The communications device of claim 13, wherein the processor performs in accordance with the obtained program:

15. The communication device of claim 13, wherein the processor performs, in accordance with the obtained program:

16. The communications device of claim 15, wherein said bit number related information includes an indication of a number of frequency domain basis vectors.

17. The communications device of claim 15, wherein the transceiver is further configured to:

and sending the bit number related information to the network equipment.

18. The communication device of claim 13, wherein the processor performs, in accordance with the obtained program:

19. The communication device according to any of claims 13-18, wherein the predetermined threshold is determined according to CSI overhead when rank-1 or the predetermined threshold is determined according to uplink resources allocated to the communication device by the network device.

20. The communication device of any of claims 13-18, wherein the processor, in accordance with the obtained program, performs:

21. A communication device, comprising:

the transceiver is used for receiving the channel state information CSI sent by the terminal equipment;

a memory for storing program instructions;

if partial information in the CSI is determined to be discarded, decoding the CSI according to a CSI discarding rule adopted by the terminal equipment; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate;

wherein the CSI is obtained by the terminal device discarding the partial information by using the following method:

22. The communications device of claim 21, wherein the CSI comprises a first part of CSI comprising a rank indication, RI, and a total number of non-zero coefficients for all layers indicating information, or comprises a first part of CSI comprising all or part of non-zero coefficients for at least one layer and non-zero coefficient position indicating information;

the processor executes according to the obtained program:

23. The communications device of claim 22, wherein said processor performs, in accordance with the obtained program:

24. The communication device according to any of claims 21-23, wherein the predetermined threshold is determined according to CSI overhead when rank-1 or the predetermined threshold is determined according to uplink resources allocated to the terminal device by the communication device.

25. An information transmission apparatus, comprising:

the channel measurement unit is used for carrying out channel measurement to obtain Channel State Information (CSI), wherein the CSI comprises at least one layer of nonzero coefficient set and nonzero coefficient position indication information;

a transmission unit, configured to send the CSI with the discarded part of the information to the network device;

the discarding unit is specifically configured to:

26. An information transmission apparatus, comprising:

the transmission unit is used for receiving the channel state information CSI sent by the terminal equipment;

a decoding unit, configured to decode the CSI according to a CSI discard rule adopted by the terminal device; the CSI discarding rule is used for indicating that non-zero coefficient position indication information in the CSI is discarded by a preset discarding rule, and discarding non-zero coefficients in the CSI according to a preset threshold or a preset code rate;

27. A computer storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any one of claims 1-8 or to perform the method of any one of claims 9-12.