CN109391407B

CN109391407B - Channel State Information (CSI) feedback method and resource allocation method and equipment

Info

Publication number: CN109391407B
Application number: CN201710682202.2A
Authority: CN
Inventors: 李辉; 高秋彬; 陈润华; 拉盖施; 黄秋萍; 苏昕
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-08-10
Filing date: 2017-08-10
Publication date: 2020-06-23
Anticipated expiration: 2037-08-10
Also published as: WO2019029289A1; CN109391407A

Abstract

The invention discloses a Channel State Information (CSI) feedback method, a resource allocation method and equipment, wherein the method comprises the following steps: the terminal calculates Channel State Information (CSI) by using codebook parameters configured by a base station and acquires CSI information, wherein the CSI information comprises Rank Indication (RI); the terminal acquires a first uplink channel resource allocated by a base station to the terminal, and when the value of the RI is greater than 1, the terminal takes rank-1 CSI in the CSI information as first CSI information and sends the first CSI information to the base station through the first uplink channel resource, so that the base station can allocate a second uplink channel resource for transmitting second CSI information to the terminal according to the first CSI information, and the second CSI information is the residual CSI information except the rank-1 CSI information in the CSI information.

Description

Channel State Information (CSI) feedback method and resource allocation method and equipment

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a channel state information CSI feedback method, a resource allocation method, and a device.

Background

In a MIMO (Multiple-Input Multiple-Output) system, a terminal needs to report CSI (Channel State Information), where the CSI includes RI (Rank Indication), PMI (Precoding Matrix Indicator), CQI (Channel quality Indication), and may also include CRI (Channel State Information measurement reference signal) resource Indication CRI Information, and in order to make the terminal report the CSI to a base station for base station scheduling, the base station needs to allocate uplink Channel resources for the terminal to report the CSI, and for a certain codebook configuration of the base station, a CSI load of the terminal may dynamically change with different RI reports.

A type I codebook and a type II codebook are defined in an NR (New RAT (radio access technology) system, when a base station configures the type II codebook for a terminal, a load of CSI reported by the terminal is different according to RI, a dynamic variation range of a load overhead is large, and if uplink information resources are allocated according to a maximum overhead, a large waste of resources may be caused; if the allocated uplink resource is small, the feedback accuracy cannot be guaranteed.

Therefore, in the prior art, an effective CSI feedback method is lacking for the case where the feedback dynamic range in the NR system is large.

Disclosure of Invention

The embodiment of the invention provides a Channel State Information (CSI) feedback method, a resource allocation method and equipment, which are used for solving the technical problem that an effective CSI feedback method is lacked under the condition of a large feedback dynamic range in an NR system.

To this end, an embodiment of the present invention provides a method for feeding back CSI, including:

the terminal calculates Channel State Information (CSI) by using codebook parameters configured by a base station and acquires CSI information, wherein the CSI information comprises Rank Indication (RI);

the terminal acquires a first uplink channel resource allocated by a base station to the terminal, and when the value of the RI is greater than 1, the terminal takes rank-1 CSI in the CSI as first CSI information and sends the first CSI information to the base station through the first uplink channel resource, so that the base station can allocate a second uplink channel resource for transmitting second CSI information to the terminal according to the first CSI information, and the second CSI information is the residual CSI information except the rank-1 CSI information in the CSI information;

and the terminal acquires the second uplink channel resource and sends the second CSI information to the base station through the second uplink channel resource, so that the base station combines the first CSI information and the second CSI information after receiving the second CSI information, and further obtains the complete CSI information.

Optionally, the rank 1CSI information includes the RI, content required to construct a precoding matrix with rank 1, and a channel quality indicator CQI corresponding to a codeword code; and if the terminal needs to report the CSI-RS resource indication CRI, the rank 1CSI information also comprises the CRI.

Optionally, the content required for constructing the precoding matrix with rank of 1 includes:

the precoding matrix indicates a rotation factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a wideband amplitude of the first layer in the PMI, a subband amplitude of the first layer in the PMI, and a subband phase of the first layer in the PMI.

Optionally, when the rank-1 CSI information includes a CRI, the terminal jointly encodes the CRI, the RI, and a wideband amplitude of the first layer in the PMI, and jointly encodes a rotation factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI, and the CQI, and then sends the jointly encoded information to the base station through the first uplink channel resource.

Optionally, the remaining CSI information includes a strongest coefficient from the second layer to the RI layer in the PMI, a wideband amplitude from the second layer to the RI layer in the PMI, a subband phase from the second layer to the RI layer in the PMI, and a CQI corresponding to a redundant codeword.

Optionally, the terminal independently encodes the wideband amplitudes from the second layer to the RI layer in the PMI, jointly encodes the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI, and the CQI corresponding to the redundant codeword, and then sends the encoded result to the base station through the second uplink channel resource.

Optionally, when the value of RI is 1, the method includes:

and the terminal sends the CSI information as the first CSI information to the base station through the first uplink channel resource, so that the base station receives the complete CSI information through the first CSI information.

On the other hand, an embodiment of the present invention further provides a resource allocation method, including:

a base station allocates a first uplink channel resource for transmitting first CSI information to a terminal, wherein the first uplink channel resource is determined by codebook parameters configured for the terminal by the base station;

the base station determines the total uplink channel resource required by the terminal for sending the CSI information according to the RI value in the first CSI information sent by the terminal through the first uplink channel resource;

when the value of the RI is greater than 1, the first CSI information is rank 1CSI information in the CSI information, the base station calculates to obtain a second uplink channel resource required by the terminal to send second CSI information according to the total uplink channel resource and the first uplink channel resource used for sending the first CSI information, and the second CSI information is the residual CSI information except the rank 1CSI information in the CSI information;

and the base station allocates the second uplink channel resource to the terminal, so that the terminal can send the second CSI information by using the second uplink channel resource.

Optionally, when the value of the RI is 1, the first CSI information is complete CSI information, including:

and the base station receives the first CSI information sent by the terminal through the first uplink channel resource, so as to obtain the complete CSI information.

On the other hand, an embodiment of the present invention further provides a terminal, including:

the system comprises a calculation module, a processing module and a processing module, wherein the calculation module is used for calculating Channel State Information (CSI) by using codebook parameters configured by a base station and obtaining CSI information, and the CSI information comprises Rank Indication (RI);

a first obtaining module, configured to obtain a first uplink channel resource allocated by a base station to the terminal, and when the value of the RI is greater than 1, the terminal sends rank-1 CSI information in the CSI information as first CSI information to the base station through the first uplink channel resource, so that the base station can allocate, to the terminal, a second uplink channel resource for transmitting second CSI information according to the first CSI information, where the second CSI information is remaining CSI information excluding the rank-1 CSI information from the CSI information;

and the second obtaining module is configured to obtain the second uplink channel resource, and send the second CSI information to the base station through the second uplink channel resource, so that the base station combines the first CSI information and the second CSI information after receiving the second CSI information, thereby obtaining complete CSI information.

Optionally, the second encoding module is configured to, when the rank-1 CSI information includes a CRI, jointly encode the CRI, the RI, and a wideband amplitude of the first layer in the PMI, and jointly encode a twiddle factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, and a subband phase of the first layer in the PMI and the CQI, and then send the encoded subband phase and the CQI to the base station through the first uplink channel resource.

Optionally, the method includes: and the second coding module is used for jointly coding the wideband amplitude independent coding from the second layer to the RI layer in the PMI, the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI and the CQI corresponding to the redundant codeword and then sending the coded signals to the base station through the second uplink channel resource.

Optionally, when the value of RI is 1, the method includes:

a sending module, configured to send the CSI information as the first CSI information to the base station through the first uplink channel resource, so that the base station receives the complete CSI information through the first CSI information.

In another aspect, an embodiment of the present invention further provides a base station device, including:

a first allocation module, configured to allocate, to a terminal, a first uplink channel resource for transmitting first CSI information, where the first uplink channel resource is determined by a codebook parameter configured for the terminal by the base station;

a determining module, configured to determine, by the base station, a total uplink channel resource required for the terminal to send the CSI information according to an RI value in the first CSI information sent by the terminal through the first uplink channel resource;

a calculating module, configured to calculate, when the value of the RI is greater than 1, a second CSI information that is required by the terminal to send a second CSI information according to the total uplink channel resource and the first uplink channel resource used for sending the first CSI information, where the first CSI information is rank 1CSI information in the CSI information, and the second CSI information is remaining CSI information excluding rank 1CSI information in the CSI information;

a second allocating module, configured to allocate the second uplink channel resource to the terminal, so that the terminal can send the second CSI information by using the second uplink channel resource.

Optionally, when the value of the RI is 1, the first CSI information is complete CSI information, including

A module, configured to receive the first CSI sent by the terminal through the first uplink channel resource:

and receiving information to further obtain the complete CSI information.

On the other hand, an embodiment of the present invention provides a terminal, which mainly includes a processor and a memory, where a preset program is stored in the memory, the processor reads the program in the memory, and executes the following processes according to the program:

Optionally, when the value of the RI is 1, the terminal sends the CSI information as the first CSI information to the base station through the first uplink channel resource, so that the base station receives the complete CSI information through the first CSI information.

On the other hand, an embodiment of the present invention provides a base station device, where the base station device mainly includes a processor and a memory, where a preset program is stored in the memory, and the processor reads the program in the memory and executes the following processes according to the program:

Optionally, when the value of the RI is 1, the first CSI information is complete CSI information, and the base station receives the first CSI information sent by the terminal through the first uplink channel resource, so as to obtain complete CSI information.

On the other hand, an embodiment of the present invention further provides a channel state information CSI feedback method, including:

a terminal acquires uplink channel resources distributed to the terminal by the base station, wherein the uplink channel resources comprise a first area for transmitting first CSI (channel state information) and a second area for transmitting user data;

when the value of the RI is greater than 1, the terminal takes rank 1CSI in the CSI information as the first CSI information and sends the first CSI information to the base station through the first area; and replacing part of user data to be transmitted in a second area with second CSI information so as to send the second CSI information to the base station through the second area, so that the base station can combine the first CSI information and the second CSI information after receiving the first CSI information and the second CSI information to obtain complete CSI information, wherein the second CSI information is the rest CSI information except for rank 1CSI information in the CSI information.

Optionally, when the rank-1 CSI information includes a CRI, the terminal jointly codes the CRI, the RI, and a wideband amplitude of the first layer in the PMI, and jointly codes a rotation factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI, and the CQI, and then sends the jointly coded signals to the base station through the first area.

Optionally, the terminal independently encodes the wideband amplitude from the second layer to the RI layer in the PMI, and uses the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI, and the CQI corresponding to the unnecessary codeword as the second CSI information, and sends the second CSI information to the base station through the second region.

Optionally, when the value of RI is 1, the method includes:

and the terminal sends the CSI information as the first CSI information to the base station through the first area, so that the base station receives the complete CSI information through the first CSI information.

the method comprises the steps that a base station allocates uplink channel resources for a terminal, wherein the uplink channel resources are determined by codebook parameters configured for the terminal by the base station, and the uplink channel resources comprise a first area for transmitting first CSI information and a second area for transmitting user data;

when the value of RI in the CSI information is greater than 1, the base station receives first CSI information sent by the terminal through the first area and second CSI information sent by the terminal on a second area, and then the first CSI information and the second CSI information are combined to obtain complete CSI information;

the first CSI information is rank 1CSI information in the CSI information, and the second CSI information is residual CSI information excluding the rank 1CSI information in the CSI information.

and the base station receives the first CSI information sent by the terminal through the first area, and then obtains the complete CSI information through the first CSI information.

the system comprises a calculation unit and a processing unit, wherein the calculation unit is used for calculating Channel State Information (CSI) by using codebook parameters configured by a base station and acquiring CSI information, and the CSI information comprises Rank Indication (RI);

an obtaining unit, configured to obtain an uplink channel resource allocated by the base station to the terminal, where the uplink channel resource includes a first region for transmitting first CSI information and a second region for transmitting user data;

a first sending unit, configured to send rank-1 CSI information in the CSI information as the first CSI information to the base station through the first region when the value of the RI is greater than 1; and replacing part of user data to be transmitted in a second area with second CSI information so as to send the second CSI information to the base station through the second area, so that the base station can combine the first CSI information and the second CSI information after receiving the first CSI information and the second CSI information to obtain complete CSI information, wherein the second CSI information is the rest CSI information except for rank 1CSI information in the CSI information.

Optionally, the method includes:

and a first encoding unit, configured to jointly encode the CRI, the RI, and a wideband amplitude of a first layer in the PMI, and select a twiddle factor in the PMI and a beam in the PMI when the rank 1CSI information includes the CRI, and send a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI, and the CQI after joint encoding to the base station through the first region.

Optionally, the method includes: and the second coding unit is used for jointly coding the wideband amplitude independent coding from the second layer to the RI layer in the PMI, the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI and the CQI corresponding to the redundant codeword as the second CSI information and sending the second CSI information to the base station through the second region.

Optionally, when the value of RI is 1, the method includes:

a second sending unit, configured to send the CSI information as the first CSI information to the base station through the first area, so that the base station receives the complete CSI information through the first CSI information.

the terminal comprises an allocation module, a processing module and a processing module, wherein the allocation module is used for allocating uplink channel resources for the terminal, the uplink channel resources are determined by codebook parameters configured for the terminal by a base station, and the uplink channel resources comprise a first area for transmitting first CSI information and a second area for transmitting user data;

the base station comprises a first receiving module and a second receiving module, wherein the first receiving module is used for receiving first CSI information sent by a terminal through a first area and second CSI information sent by the terminal on a second area when the value of RI in the CSI information is greater than 1, and then combining the first CSI information and the second CSI information to obtain complete CSI information;

and the second receiving module is used for receiving the first CSI information sent by the terminal through the first area, and further obtaining the complete CSI information through the first CSI information.

Optionally, the terminal independently encodes the wideband amplitudes from the second layer to the RI layer in the PMI, and uses the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI, and the CQI corresponding to the unnecessary codeword as the second CSI information, and sends the second CSI information to the base station through the second region.

Optionally, when the value of RI is 1, the method includes:

On the other hand, an embodiment of the present invention provides a base station device, which mainly includes a processor and a memory, where a preset program is stored in the memory, and the processor reads the program in the memory and executes the following processes according to the program:

One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:

1. in the embodiment of the invention, a terminal is adopted to calculate the CSI by using the codebook parameters configured by a base station, and the CSI information is obtained, wherein the CSI information comprises a Rank Indication (RI); the terminal acquires a first uplink channel resource allocated by a base station to the terminal, and when the value of the RI is greater than 1, the terminal takes rank-1 CSI in the CSI as first CSI information and sends the first CSI information to the base station through the first uplink channel resource, so that the base station can allocate a second uplink channel resource for transmitting second CSI information to the terminal according to the first CSI information, and the second CSI information is the residual CSI information except the rank-1 CSI information in the CSI information; and the terminal acquires the second uplink channel resource and sends the second CSI information to the base station through the second uplink channel resource, so that the base station combines the first CSI information and the second CSI information after receiving the second CSI information, thereby acquiring the complete CSI information.

That is, in the NR system, CSI information to be fed back by the terminal is decomposed into rank 1CSI information and remaining CSI information, the base station allocates uplink channel resources according to the rank 1CSI information and the remaining CSI information, and the terminal reports the rank 1CSI information and the remaining CSI information, respectively, thereby realizing effective allocation of uplink resources and accurate feedback of CSI information.

2. In the embodiment of the invention, a terminal is adopted to calculate the CSI by using the codebook parameters configured by a base station, and the CSI information is obtained, wherein the CSI information comprises Rank Indication (RI); the terminal acquires uplink channel resources distributed by the base station for the terminal, wherein the uplink channel resources comprise a first area for transmitting first CSI (channel state information) and a second area for transmitting user data; when the value of the RI is greater than 1, the terminal takes rank 1CSI in the CSI information as the first CSI information and sends the first CSI information to the base station through the first area; and replacing part of user data to be transmitted in a second area with second CSI information so as to send the second CSI information to the base station through the second area, so that the base station can combine the first CSI information and the second CSI information after receiving the first CSI information and the second CSI information to obtain complete CSI information, wherein the second CSI information is a technical scheme of removing the rest CSI information of rank 1CSI information from the CSI information.

That is, in the NR system, CSI information that the terminal needs to feed back is decomposed into rank 1CSI information and remaining CSI information, an uplink channel resource allocated by the base station to the terminal includes a first region for transmitting the rank 1CSI information and a second region for transmitting user data, so that the terminal sends the rank 1CSI information in the CSI information to the base station through the first region in the uplink channel resource, replaces part of the user data sent in the second region in the uplink channel resource with the remaining CSI information in the CSI information, and sends the remaining CSI information to the base station through the second region in the uplink channel resource, thereby achieving effective allocation of the uplink resource and accurate feedback of the CSI information.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

Fig. 1 is a flowchart of a method for feeding back CSI according to a first embodiment of the present application;

fig. 2 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a base station device according to an embodiment of the present application;

fig. 4 is a flowchart of a channel state information CSI feedback method according to a second embodiment of the present application;

fig. 5 is a schematic structural diagram of a terminal according to a second embodiment of the present application;

fig. 6 is a schematic structural diagram of a base station device according to a second embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the technical solutions of the present invention. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments described in the present application are within the scope of the protection of the technical solution of the present invention.

Example one

Referring to fig. 1, in an embodiment of the present invention, a method for feeding back CSI includes the following steps:

step S101: the terminal calculates Channel State Information (CSI) by using codebook parameters configured by a base station and acquires CSI information, wherein the CSI information comprises Rank Indication (RI);

step S102: the method comprises the steps that a terminal obtains a first uplink channel resource distributed by a base station for the terminal, when the value of RI is larger than 1, the terminal takes rank-1 CSI in CSI information as first CSI information and sends the first CSI information to the base station through the first uplink channel resource, so that the base station can distribute a second uplink channel resource used for transmitting second CSI information for the terminal according to the first CSI information, and the second CSI information is the residual CSI information except the rank-1 CSI information in the CSI information.

Step S103: and the terminal acquires the second uplink channel resource and sends the second CSI information to the base station through the second uplink channel resource, so that the base station combines the first CSI information and the second CSI information after receiving the second CSI information, and further obtains the complete CSI information.

In a specific practical process, the embodiment of the present invention first executes step S101, that is, the terminal calculates the CSI using the codebook parameters configured by the base station, and obtains the CSI information, where the CSI information includes the rank indication RI.

In the novel wireless access NR system, the base station may configure different codebook parameters for the terminal and further enable the terminal to calculate the CSI using the codebook parameters configured by the base station for the terminal, for example, the base station may configure a type II codebook for the terminal, and further the terminal may calculate the CSI using the type II codebook configured by the base station for the terminal to obtain CSI information; the base station may also configure a type I codebook for the terminal, and then the terminal may calculate CSI using the type I codebook configured by the base station to obtain CSI information, where different types of codebooks also have different port numbers, for example, the type II codebook includes a 32-port type II codebook, a 16-port type II codebook, and the like, in this embodiment, specifically, taking the base station as an example to configure the 32-port type II codebook for the terminal, the terminal may calculate CSI using the 32-port type II codebook configured by the base station for the terminal, and obtain CSI information, where the CSI information includes a rank indication RI, and an RI value is 1, or an RI is greater than 1, such as 2.

In practical application, when the value of RI in the CSI information calculated and obtained by the terminal is 1, the CSI information may further include content required for constructing a precoding matrix with rank being 1, and a channel quality indication CQI corresponding to one codeword, and the CRI should also be included if the base station configures more than 1 CSI-RS resource for the terminal. In a specific practical process, the RI in the CSI information is content required for constructing a precoding matrix with rank 1, a channel quality indicator CQI corresponding to one codeword, and the CRI (if reporting is required) is also referred to as rank 1CSI information of the CSI information.

In a specific practical process, the content required for constructing the precoding matrix with rank 1 may include: the precoding matrix indicates a rotation factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a wideband amplitude of the first layer in the PMI, a subband amplitude of the first layer in the PMI, and a subband phase of the first layer in the PMI.

When RI in the CSI information calculated and obtained by the terminal is greater than 1, the CSI information may include, in addition to the rank 1CSI information, the strongest coefficient from the second layer to the RI layer in the PMI, the wideband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI, and the CQI of the unnecessary codeword.

For example, when the value of RI is 2, the CSI information further includes a strongest coefficient of the second layer in the PMI, a wideband amplitude of the second layer in the PMI, a subband phase of the second layer in the PMI, and a CQI of the unnecessary codeword; when the value of RI is 3, the CSI information may further include the strongest coefficient of the second layer and the strongest coefficient of the third layer in the PMI, the wideband amplitude of the second layer and the wideband amplitude of the third layer in the PMI, the subband amplitude of the second layer and the subband amplitude of the third layer in the PMI, and the subband phase of the second layer, the subband phase of the third layer in the PMI, and the CQI of the unnecessary codeword.

After step S101 is executed, step S102 is executed, that is, a terminal acquires a first uplink channel resource allocated to the terminal by a base station, and when the value of the RI is greater than 1, the terminal takes rank-1 CSI information in the CSI information as first CSI information and sends the first CSI information to the base station through the first uplink channel resource, so that the base station can allocate a second uplink channel resource for transmitting second CSI information to the terminal according to the first CSI information, where the second CSI information is remaining CSI information excluding the rank-1 CSI information from the CSI information.

In a specific practical process, the terminal receives a first uplink channel resource allocated to the terminal by the base station, in practical application, the base station allocates the first uplink channel resource to the terminal according to the overhead of the Rank 1CSI information, and the Rank 1CSI information is CSI information when the terminal adopts a codebook with Rank 1 for feedback.

Please refer to table one and table two, it is assumed that the base station only configures one CSI-RS resource with 32 ports, i.e. CRI reporting is not required. The base station configures the number L of beam combinations of a 32-port type II codebook to be 3, the number of feedback subbands is 10, 3 bits of RI overhead are defined, the number of feedback subbands is 10, the system predefines 3 bits of RI overhead, and a channel quality indication CQI corresponding to one codeword, that is, a CQI of each subband is 4 bits, then, as shown in table one and table two, it is known that the size of rank 1CSI information is RI + PMI + CQI 3+192+40 + 235 bits, and then, the base station may allocate, according to the calculated size of the rank 1CSI information, a first uplink channel resource occupied by transmitting 235-bit information to the terminal for the terminal to feed back the first CSI information.

TABLE-PMI feedback overhead (wideband portion) for 32-Port type II codebooks

TABLE two PMI feedback overhead (subband portion) for 32-Port type II codebook

Then, after obtaining the first uplink channel resource occupied by the 235-bit information distributed by the base station by the terminal, the terminal determines, according to the value taking condition of the RI in the CSI information obtained by the terminal through calculation, whether to send the complete CSI information to the base station as the first uplink channel resource occupied by the 235-bit information distributed by the base station for the first CSI information, or to send the rank-1 CSI information in the CSI information obtained by the terminal through calculation to the base station as the first uplink channel resource occupied by the 235-bit information distributed by the base station for the first CSI information.

Specifically, when RI is greater than 1, for example, when RI is 2, the terminal may use rank 1CSI information in the CSI information obtained by calculation as first CSI information, and send the first CSI information to the base station through a first uplink channel resource occupied by the base station for transmitting 235-bit information, in practical applications, the terminal may combine the first CSI information, that is, RI in the rank 1CSI information, and the wideband amplitude of the first layer in the PMI into one part for encoding when sending the first CSI information through the first uplink channel resource, and combine the subband phase of the first layer in the PMI and the CQI into one part for encoding, and then send the part to the base station through the first uplink channel resource.

Of course, the terminal may also encode the first CSI information, that is, RI in the rank 1CSI information, wideband amplitude of the first layer in the PMI, twiddle factor in the PMI, beam selection in the PMI, the strongest coefficient of the first layer in the PMI, subband amplitude of the first layer in the PMI, subband phase of the first layer in the PMI, and CQI as a whole, and then transmit the encoded subband phase and CQI to the base station through the first uplink channel resource.

It can be understood that, in other application cases, if the rank 1CSI information further includes CRI, in practical application, RI in the rank 1CSI information, wideband amplitude of the first layer in the PMI, a rotation factor in the PMI, beam selection in the PMI, a strongest coefficient of the first layer in the PMI, subband amplitude of the first layer in the PMI, and subband phase and CQI of the first layer in the PMI may also be encoded as a whole, and then sent to the base station through the first uplink channel resource; or the CRI, the RI and the broadband amplitude of the first layer in the PMI are combined into a part for coding, the rotation factor in the PMI, the beam selection in the PMI, the strongest coefficient of the first layer in the PMI, the subband amplitude of the first layer in the PMI, the subband phase of the first layer in the PMI and the CQI are combined into a part for coding, and then the part is sent to the base station through the first uplink channel resource.

In this embodiment, specifically, the terminal combines RI in the rank 1CSI information and the wideband amplitude of the first layer in the PMI into one part for encoding, combines a rotation factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI and a CQI into one part for encoding, and then sends the encoded part to the base station through the first uplink channel resource.

Then, the base station receives rank 1CSI information sent by the terminal using the first uplink information resource, where the rank 1CSI information includes RI in CSI information obtained by the terminal through calculation, and then the base station may determine the RI from the received rank 1CSI information, and calculate, according to a value of the RI, a total uplink channel resource required by the terminal side to send the CSI information.

Referring to the first table and the second table, when an RI value is specifically 2, the base station considers that the overhead of the RI is 3 bits, if a rank is 1 or 2 in a 32-port type II codebook, the base station only has one codeword, the codeword corresponds to a channel quality indicator CQI, a CQI of each subband is 4 bits, and CQI overhead of 10 subbands is 40 bits, and when the RI value is specifically 2, the base station calculates that the total CSI information sent by the terminal requires RI + PMI + CQI 3+370+40 to be 413 bits.

If rank 1 in the 32-port type II codebook corresponds to a codeword, the CQI of each subband is 4 bits; and if rank is 1, there is one codeword, and rank is 2, there are two codewords codeword, each subband includes two CQIs, where CQI1 corresponding to the first codeword is 4 bits, CQI2 corresponding to the second codeword is 3 bits, and each subband includes 7 bits total of CQI1 and CQI 2. Considering that the overhead of RI is 3 bits and the CQI overhead of 10 subbands is 70 bits, when the value of RI is specifically 2, the base station needs 443 bits of RI + PMI + CQI of 3+370+70 to calculate the total CSI information sent by the terminal.

Specifically, for example, there is only one codeword in the 32-port type II codebook when rank is 1 or rank is 2, and the base station calculates that RI + PMI + CQI + 3+370+40 + 413 bits are required for the terminal to send the total CSI information.

Since the base station has configured the first uplink channel resource occupied by transmitting the 235-bit information to the terminal for sending the first CSI information in the CSI information, the base station calculates that the overhead of sending the remaining CSI information in the CSI information by the terminal is 413-178 bits according to 413 bits of the total CSI overhead and the overhead reported by the first CSI information, that is, the 235 bits used by the terminal for sending the first CSI information. Then, the base station allocates a second uplink channel resource for the terminal according to the resource occupied by transmitting the 178-bit CSI overhead for feeding back the CSI information which is not reported for the first time, that is, the remaining CSI information in the CSI information.

Specifically, for example, rank-1 in the 32-port type II codebook corresponds to a codeword, CQI of each subband is 4 bits, and there is one codeword when rank-1, and there are two codewords codeword when rank-2, and the base station calculates that RI + PMI + CQI + 3+370+70 bits are required for the terminal to send total CSI information.

Since the base station has configured the first uplink channel resource occupied by transmitting the 235-bit information to the terminal for sending the first CSI information in the CSI information, the base station calculates, according to 443 bits of total CSI overhead and the overhead reported by the first CSI information, that is, the 235 bits used by the terminal for sending the first CSI information, that the resource occupied by the overhead of sending the remaining CSI information in the CSI information by the terminal is 443 bits and 235 bits. Then, the base station allocates a second uplink channel resource for the terminal according to the 208-bit CSI overhead for transmission to feed back the CSI information that is not reported for the first time, that is, the CSI information remaining in the CSI information.

After step S102 is executed, step S103 is executed, that is, the terminal acquires the second uplink channel resource and sends the second CSI to the base station through the second uplink channel resource, so that the base station combines the first CSI and the second CSI after receiving the second CSI to obtain the complete CSI.

Specifically, after the terminal receives the second uplink channel resource occupied by the 178-bit information distributed by the base station for the terminal, the second CSI information which is fed back in the CSI information, that is, the remaining CSI information excluding the rank 1CSI information in the CSI information is transmitted to the base station through the second uplink channel resource occupied by the 178-bit information, in practical application, when the terminal sends the second CSI information, that is, the remaining CSI information excluding the rank-1 CSI information, through the second uplink channel resource, the wideband amplitude from the second layer to the RI layer in the PMI in the second CSI information may be independently encoded, the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, and the subband phase from the second layer to the RI layer in the PMI may be combined into one part to be encoded, and then the part may be transmitted to the base station through the second uplink channel resource.

The terminal may also encode the wideband amplitude from the second layer to the RI layer in the PMI in the second CSI information, the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, and the subband phase from the second layer to the RI layer in the PMI as a whole, and then transmit the encoded subband phase to the base station through the second uplink channel resource.

In this embodiment, specifically, the wideband amplitude from the second layer to the RI layer in the PMI in the second CSI information is independently encoded, the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, and the subband phase from the second layer to the RI layer in the PMI are combined into one part to be encoded, and then the part is sent to the base station through the second uplink channel resource.

Specifically, after receiving the second uplink channel resource occupied by the 208-bit information distributed by the base station for the terminal, the second CSI information which is fed back in the CSI information, that is, the remaining CSI information excluding the rank-1 CSI information in the CSI information is sent to the base station through the second uplink channel resource occupied by transmitting 208-bit information, in practical application, when the terminal sends the second CSI information, that is, the remaining CSI information excluding the rank-1 CSI information, through the second uplink channel resource, the wideband amplitude from the second layer to the RI layer in the PMI in the second CSI information may be independently encoded, the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI, and the CQI corresponding to the remaining 1 codeword may be combined into one part to be encoded, and then the part is transmitted to the base station through the second uplink channel resource.

Therefore, by the above method, in the NR system, CSI information that the terminal needs to feed back is decomposed into rank 1CSI information and remaining CSI information. And the base station respectively allocates uplink channel resources according to the rank 1CSI information and the residual CSI information, and the terminal respectively reports the rank 1CSI information and the residual CSI information, so that the effective allocation of the uplink resources and the accurate feedback of the CSI information are realized.

Of course, in practical applications, there may be a case where the value of RI in the CSI information obtained by the terminal through calculation is 1, and at this time, the CSI information obtained by the terminal through calculation only has the rank 1CSI information, so that when the terminal receives the first uplink channel allocated by the base station to the terminal, the terminal may transmit the complete CSI information as the first CSI information to the base station through the first uplink channel,

in this embodiment of the present invention, a first uplink channel allocated by a base station to a terminal is end-allocated according to the overhead of rank 1CSI information, for example, the base station configures 3 beam combining numbers L of a 32-port type II codebook, the number of feedback subbands is 10, 3 bits of RI overhead are defined, the number of feedback subbands is 10, the system predefines 3 bits of RI overhead, and a channel quality indication CQI corresponding to one codeword, that is, a CQI of each subband is 4 bits, then, as shown in the above table one and table two, the size of rank 1CSI information is RI + PMI + CQI + 3+192+40 + 235 bits, and then the base station may allocate, according to the calculated size of the rank 1CSI information, a first uplink channel resource occupied by transmitting 235 bits of information to the terminal for the terminal to feed back the first CSI information.

And under the condition that the value of RI in the CSI information obtained by the terminal calculation is 1, at this time, the CSI information obtained by the terminal calculation only has the rank 1CSI information, and the rank 1CSI information is also 235 bits, so that the terminal can send the rank 1CSI information with the size of 235 bits to the base station by transmitting the first uplink channel resource occupied by the 235 bit information, thereby realizing effective allocation of uplink resources and accurate feedback of the CSI information.

Based on the same inventive concept, the embodiment of the present invention provides a resource allocation method, where the resource allocation method is applied to a base station side, and for specific implementation of the method, reference may be made to the description of the above method embodiment applied to a terminal side, and repeated details are not described again, and the method includes:

Based on the same inventive concept, embodiments of the present invention provide a terminal, and for specific implementation of a CSI feedback method for the terminal, reference may be made to the description of the method embodiment, repeated details are not repeated, and please refer to fig. 2, where the terminal mainly includes:

a calculating module 10, configured to calculate channel state information CSI using codebook parameters configured by a base station, and obtain CSI information, where the CSI information includes a rank indication RI;

a first obtaining module 11, configured to obtain a first uplink channel resource allocated by a base station to the terminal, and when the value of the RI is greater than 1, the terminal sends rank-1 CSI information in the CSI information as first CSI information to the base station through the first uplink channel resource, so that the base station can allocate, to the terminal, a second uplink channel resource used for transmitting second CSI information according to the first CSI information, where the second CSI information is remaining CSI information excluding the rank-1 CSI information from the CSI information;

a second obtaining module 12, configured to obtain the second uplink channel resource, and send the second CSI information to the base station through the second uplink channel resource, so that the base station combines the first CSI information and the second CSI information after receiving the second CSI information, so as to obtain complete CSI information.

Optionally, the second encoding module is configured to, when the rank-1 CSI information includes a CRI, jointly encode the CRI, the RI, and a wideband amplitude of the first layer in the PMI, and jointly encode a twiddle factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI, and the CQI, and then send the encoded subband phase and the CQI to the base station through the first uplink channel resource.

Optionally, the second encoding module is configured to independently encode the wideband amplitudes from the second layer to the RI layer in the PMI, jointly encode the strongest coefficients from the second layer to the RI layer in the PMI, the subband amplitudes from the second layer to the RI layer in the PMI, the subband phases from the second layer to the RI layer in the PMI, and CQIs corresponding to redundant codewords codeword, and then send the encoded result to the base station through the second uplink channel resource.

Optionally, when the value of RI is 1, the method includes:

Based on the same inventive concept, embodiments of the present invention provide a base station device, and specific implementation of a resource allocation method of the base station device may refer to the description of the method embodiment, and repeated details are not repeated, please refer to fig. 3, where the base station device mainly includes:

a first allocating module 21, configured to allocate, to a terminal, a first uplink channel resource for transmitting first CSI information, where the first uplink channel resource is determined by a codebook parameter configured for the terminal by the base station;

a determining module 22, configured to determine, by the base station, a total uplink channel resource required for the terminal to send the CSI information according to an RI value in the first CSI information sent by the terminal through the first uplink channel resource;

a calculating module 23, configured to, when the value of the RI is greater than 1, calculate to obtain a second uplink channel resource required by the terminal to send second CSI information according to the total uplink channel resource and the first uplink channel resource used for sending the first CSI information, where the first CSI information is rank 1CSI information in the CSI information, and the second CSI information is remaining CSI information excluding rank 1CSI information in the CSI information;

a second allocating module 24, configured to allocate the second uplink channel resource to the terminal, so that the terminal can send the second CSI information by using the second uplink channel resource.

and the receiving module is used for receiving the first CSI information sent by the terminal through the first uplink channel resource so as to obtain the complete CSI information.

Based on the same inventive concept, embodiments of the present invention provide a terminal, where reference may be made to the description of the method embodiment for implementing a CSI feedback method, and repeated details are not repeated, the terminal mainly includes a processor and a memory, where a preset program is stored in the memory, and the processor reads the program in the memory and executes the following processes according to the program:

Based on the same inventive concept, embodiments of the present invention provide a base station device, where reference may be made to the description of the method embodiment for implementing a resource allocation method, and repeated details are not repeated, the base station device mainly includes a processor and a memory, where a preset program is stored in the memory, and the processor reads the program in the memory, and executes the following processes according to the program:

Example two

Referring to fig. 4, another CSI feedback method according to an embodiment of the present invention includes:

step S201: the terminal calculates Channel State Information (CSI) by using codebook parameters configured by a base station and acquires CSI information, wherein the CSI information comprises Rank Indication (RI);

step S203: a terminal acquires uplink channel resources distributed to the terminal by the base station, wherein the uplink channel resources comprise a first area for transmitting first CSI (channel state information) and a second area for transmitting user data;

step S204: when the value of the RI is greater than 1, the terminal takes rank 1CSI in the CSI information as the first CSI information and sends the first CSI information to the base station through the first area; and replacing part of user data to be transmitted in a second area with second CSI information so as to send the second CSI information to the base station through the second area, so that the base station can combine the first CSI information and the second CSI information after receiving the first CSI information and the second CSI information to obtain complete CSI information, wherein the second CSI information is the rest CSI information except for rank 1CSI information in the CSI information.

In a specific practical process, another CSI feedback method according to the second embodiment of the present invention first performs step S201, that is, the terminal calculates CSI using codebook parameters configured by the base station, and obtains CSI information, where the CSI information includes a rank indicator RI.

In practical application, when the value of RI in the CSI information obtained by the terminal through calculation is 1, the CSI information may further include content required to construct a precoding matrix with rank being 1, and a channel quality indication CQI corresponding to a codeword, and if the terminal needs to report a CSI-RS resource indication CRI, the rank-1 CSI information further includes the CRI.

In a specific practical process, the RI in the CSI information is content required to construct a precoding matrix with rank 1, and a channel quality indicator CQI corresponding to one codeword is also referred to as rank 1CSI information of the CSI information.

When RI in the CSI information calculated and obtained by the terminal is greater than 1, the CSI information may include, in addition to the rank 1CSI information, the strongest coefficient from the second layer to the RI layer in the PMI, the wideband amplitude from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, and the subband phase from the second layer to the RI layer in the PMI, and if there is a redundant codeword, the CSI information may further include CQI of the redundant codeword.

After step S201 is executed, step S202 is executed, that is, the terminal acquires uplink channel resources allocated to the terminal by the base station, where the uplink channel resources include a first region for transmitting the first CSI information and a second region for transmitting user data.

In a specific practical process, the terminal may receive an uplink channel resource allocated by the base station to the terminal, and in this embodiment, the uplink channel resource allocated by the base station to the terminal includes a first region for transmitting the first CSI information and a second region for transmitting user data.

In a specific practical process, the base station may set the size of a first region in an uplink channel resource allocated to the terminal by the base station according to the overhead of the Rank 1CSI information, where the Rank 1CSI information is CSI information when the terminal adopts a codebook with Rank 1 for feedback.

Please refer to table one and table two in embodiment one, where it is assumed that the base station configures a beam combining number L of a 32-port type II codebook to be 3, and there is only one codeword coded in the 32-port type II codebook no matter when rank is 1 or rank is 2, the number of feedback subbands is 10, RI overhead is defined to be 3 bits, the number of feedback subbands is 10, the system predefines RI overhead to be 3 bits, a channel quality indication CQI corresponding to one codeword coded is a CQI, that is, a CQI of each subband is 4 bits, then, as shown in table one and table two, it can be seen that the size of the rank 1CSI information is RI + PMI + CQI 3+192+40, which is 235 bits, so that the base station may set the size of the first region in the uplink channel resources as the resource occupied by transmitting the 235-bit information according to the calculated size of the rank 1CSI information, and then the first region in the uplink channel resources, which is the size of the resource occupied by transmitting the 235-bit information, may be used for the terminal to feed back the first CSI information.

In a specific practical process, the base station may set the size of the second area for transmitting the user data in the uplink channel resource according to the size of the uplink to-be-transmitted data indicated in the user data transmission request sent by the terminal to the base station, for example, when the size of the uplink to-be-transmitted data indicated in the user data transmission request sent by the terminal to the base station is 500 bits, the base station may set the size of the second area for transmitting the user data in the uplink channel resource as a resource occupied for transmitting 500 bits of information, and at this time, the size of the uplink channel resource allocated to the terminal by the base station is the sum of the size of the resource occupied for transmitting 500 bits of data and the size of the resource occupied for transmitting 235 bits of information.

When the size of the uplink to-be-transmitted data indicated in the user data transmission request sent by the terminal to the base station is 800 bits, the base station may set the size of the second region for transmitting the user data in the uplink channel resource to the size of the resource occupied for transmitting the 800-bit data, and at this time, the size of the uplink channel resource allocated to the terminal by the base station is the sum of the size of the resource occupied for transmitting the 800-bit data and the size of the resource occupied for transmitting the 235-bit information.

In this embodiment, specifically, taking the size of the uplink to-be-transmitted data indicated in the user data transmission request sent by the terminal to the base station as 500 bits as an example, the size of the uplink channel resource allocated by the base station to the terminal is the sum of the size of the resource occupied by transmitting the 500-bit data and the size of the resource occupied by transmitting the 235-bit information, the size of the first area for transmitting the first CSI information is the size of the resource occupied by transmitting the 235-bit information, and the size of the second area for transmitting the user data is the size of the resource occupied by transmitting the 500-bit data, so that the terminal, after receiving the uplink channel resource sent by the base station, executes step S203:

Specifically, when RI in the CSI information calculated and obtained by the terminal is greater than 1, for example, RI is 2, after the terminal receives the uplink channel resource sent by the base station, the terminal sends the rank-1 CSI information in the CSI information as the first CSI information to the base station through the first region in the received uplink channel resource

When the terminal sends the first CSI information through the first region in the uplink channel resource, the first CSI information, that is, RI in the rank 1CSI information and the wideband amplitude of the first layer in the PMI may be combined into one part for encoding, the twiddle factor in the PMI, the beam selection in the PMI, the strongest coefficient of the first layer in the PMI, the subband amplitude of the first layer in the PMI, the subband phase of the first layer in the PMI and the CQI are combined into one part for encoding, and then the encoded part is sent to the base station through the first region in the uplink channel resource.

Of course, the terminal may also encode RI in the first CSI information, that is, rank 1CSI information, wideband amplitude of the first layer in the PMI, twiddle factor in the PMI, and beamforming selection in the PMI, the strongest coefficient of the first layer in the PMI, the subband amplitude of the first layer in the PMI, and the subband phase of the first layer in the PMI as a whole, and transmit the result to the base station through the first region in the uplink channel resource.

Meanwhile, the terminal uses the remaining CSI information of the CSI information obtained by calculation except for the rank 1CSI information as second CSI information to replace part of the user data in the second region in the uplink channel resource, that is, the second region in the uplink channel resource is originally used for transmitting the user data, but when the RI in the CSI information obtained by calculation by the terminal is greater than 1, the CSI information includes two parts, namely, the rank 1CSI information and the remaining CSI information of the CSI information except for the rank 1CSI information, at this time, the terminal will replace part of the user data in the second region in the row channel resource with the remaining CSI information, and at this time, the content transmitted by the second region in the uplink channel resource includes the remaining CSI information and the other part of the user data which is not replaced.

For example, when the remaining CSI information of the CSI information other than the rank-1 CSI information is 178 bits, the terminal may replace a part of user data of a resource occupied by transmitting the 178-bit information in the second area in the row channel resource with the remaining CSI information, and at this time, the content transmitted in the second area in the uplink channel resource includes the resource occupied by transmitting the 178-bit remaining CSI information and a resource occupied by another part of user data that is not replaced.

In practical application, when the terminal sends the second CSI information, that is, the remaining CSI information excluding the rank 1CSI information, in the CSI information through the second region in the uplink channel resource, the wideband amplitude from the second layer to the RI layer in the PMI in the second CSI information may be independently encoded, the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, and the subband phase from the second layer to the RI layer in the PMI are combined into one part to be encoded, and then the part is sent to the base station through the second region in the uplink channel resource.

The terminal may also encode the wideband amplitude from the second layer to the RI layer in the PMI in the second CSI information, the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI, and the whole, and then transmit the encoded wideband amplitude to the base station through the second region in the uplink channel resource.

Then, after receiving the first CSI information sent by the terminal using the first region of the uplink channel resource and receiving the second CSI information sent by using the uplink channel resource, the base station may combine the first CSI information and the second CSI information to obtain complete CSI information.

Therefore, by the method, in the NR system, CSI information that the terminal needs to feed back is decomposed into rank 1CSI information and remaining CSI information, an uplink channel resource allocated by the base station to the terminal includes a first region for transmitting the rank 1CSI information and a second region for transmitting user data, so that the terminal sends the rank 1CSI information in the CSI information to the base station through the first region in the uplink channel resource, replaces part of the user data sent in the second region in the uplink channel resource with the remaining CSI information in the CSI information, and sends the remaining CSI information to the base station through the second region in the uplink channel resource, thereby achieving effective allocation of the uplink resource and accurate feedback of the CSI information.

Certainly, in practical application, there may be a case where the value of RI in the CSI information obtained by the terminal through calculation is 1, and at this time, the CSI information obtained by the terminal through calculation only has the rank 1CSI information, so that when the terminal receives an uplink resource channel allocated by the base station for the terminal, the terminal may transmit the complete CSI information as the first CSI information to the base station through the first area in the uplink channel resource, and further, the base station receives the complete CSI information through the first CSI information.

Based on the same inventive concept, the embodiment of the present invention provides a resource allocation method, which is applied to a base station side, and for specific implementation of the method, reference may be made to the description of the above method embodiment applied to a terminal side, and repeated details are not described again, and the method includes:

Based on the same inventive concept, embodiments of the present invention provide a terminal, and for specific implementation of a CSI feedback method for a terminal, reference may be made to the description of the method embodiment, repeated details are not repeated, and please refer to fig. 5, where the base station device mainly includes:

a calculating unit 30, configured to calculate channel state information CSI using codebook parameters configured by a base station, and obtain CSI information, where the CSI information includes a rank indication RI;

an obtaining unit 31, configured to obtain an uplink channel resource allocated by the base station to the terminal, where the uplink channel resource includes a first region for transmitting first CSI information and a second region for transmitting user data;

a first sending unit 32, configured to send rank-1 CSI information in the CSI information as the first CSI information to the base station through the first region when the value of the RI is greater than 1; and replacing part of user data to be transmitted in a second area with second CSI information so as to send the second CSI information to the base station through the second area, so that the base station can combine the first CSI information and the second CSI information after receiving the first CSI information and the second CSI information to obtain complete CSI information, wherein the second CSI information is the rest CSI information except for rank 1CSI information in the CSI information.

Optionally, the method includes:

Optionally, the method includes: and the second coding unit is used for independently coding the wideband amplitudes from the second layer to the RI layer in the PMI, jointly coding the strongest coefficients from the second layer to the RI layer in the PMI, the subband amplitudes from the second layer to the RI layer in the PMI, the subband phases from the second layer to the RI layer in the PMI and the CQI corresponding to the redundant code word codeword as the second CSI information, and sending the second CSI information to the base station through the second region.

Optionally, when the value of RI is 1, the method includes:

Based on the same inventive concept, embodiments of the present invention provide a base station device, and for specific implementation of a transmission method of a resource allocation method of the base station device, reference may be made to the description of the method embodiment, repeated details are not repeated, and referring to fig. 6, the base station device mainly includes:

an allocating module 40, configured to allocate, to a terminal, an uplink channel resource, where the uplink channel resource is determined by a codebook parameter configured by a base station for the terminal, and the uplink channel resource includes a first region for transmitting first CSI information and a second region for transmitting user data;

a first receiving module 41, configured to, when an RI value in CSI information is greater than 1, receive, by the base station, first CSI information sent by the terminal through the first area and second CSI information sent by the terminal on a second area, and further combine the first CSI information and the second CSI information to obtain complete CSI information;

Optionally, when the rank-1 CSI information includes a CRI, the terminal jointly encodes the CRI, the RI, and a wideband amplitude of a first layer in the PMI, and selects a twiddle factor in the PMI and a beam in the PMI, and transmits a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI, and the CQI through the first region after jointly encoding.

Optionally, when the value of RI is 1, the method includes:

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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.

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

Claims

1. A method for feeding back Channel State Information (CSI), comprising:

2. The method of claim 1, wherein the rank-1 CSI information comprises the RI, contents required to construct a precoding matrix with rank of 1, and a channel quality indication CQI corresponding to one codeword; and if the terminal needs to report the CSI-RS resource indication CRI, the rank 1CSI information also comprises the CRI.

3. The method of claim 2, wherein the content required for constructing a precoding matrix with rank of 1 comprises:

4. The method of claim 3, wherein when the rank-1 CSI information includes a CRI, the terminal jointly encodes the CRI, the RI, and a wideband amplitude of a first layer in the PMI, and transmits the CRI, the RI, and a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI, and the CQI to the base station through the first uplink channel resource after jointly encoding a twiddle factor in the PMI, a beam selection in the PMI, and the strongest coefficient of the first layer in the PMI.

5. The method of claim 1, wherein the remaining CSI information comprises strongest coefficients from the second layer to the RI layer in the PMI, wideband amplitude from the second layer to the RI layer in the PMI, subband phase from the second layer to the RI layer in the PMI, and a codeword corresponding CQI.

6. The method of claim 5, wherein the terminal independently encodes wideband amplitudes from the second layer to the RI layer in the PMI, jointly encodes a strongest coefficient from the second layer to the RI layer in the PMI, a subband amplitude from the second layer to the RI layer in the PMI, a subband phase from the second layer to the RI layer in the PMI, and a CQI corresponding to a codeword excess, and then sends the encoded wideband amplitudes to the base station through the second uplink channel resource.

7. The method as claimed in claim 1, wherein when the RI has a value of 1, comprising:

8. A method for resource allocation, comprising:

9. The method of claim 8, wherein the rank-1 CSI information comprises the RI, contents required to construct a precoding matrix with rank of 1, and a channel quality indication CQI corresponding to one codeword; and if the terminal needs to report the CSI-RS resource indication CRI, the rank 1CSI information also comprises the CRI.

10. The method of claim 9, wherein the content required for constructing a precoding matrix with rank of 1 comprises:

11. The method of claim 8, wherein the remaining CSI information comprises strongest coefficients from the second layer to the RI layer in the PMI, wideband amplitude from the second layer to the RI layer in the PMI, subband phase from the second layer to the RI layer in the PMI, and a codeword corresponding CQI.

12. The method of claim 8, wherein the first CSI information is complete CSI information when the RI has a value of 1, comprising:

13. A terminal, comprising:

14. The terminal of claim 13, wherein the rank-1 CSI information includes the RI, contents required to construct a precoding matrix with rank of 1, and a channel quality indication CQI corresponding to one codeword; and if the terminal needs to report the CSI-RS resource indication CRI, the rank 1CSI information also comprises the CRI.

15. The terminal of claim 14, wherein the content required for constructing the precoding matrix with rank of 1 comprises:

16. The terminal of claim 15, comprising:

and a second coding module, configured to jointly code the CRI, the RI, and a wideband amplitude of the first layer in the PMI when the rank 1CSI information includes the CRI, and send the jointly coded rotation factor in the PMI, the beam selection in the PMI, the strongest coefficient of the first layer in the PMI, the subband amplitude of the first layer in the PMI, the subband phase of the first layer in the PMI, and the CQI to the base station through the first uplink channel resource.

17. The terminal of claim 13, wherein the remaining CSI information comprises strongest coefficients from the second layer to the RI layer in the PMI, wideband amplitude from the second layer to the RI layer in the PMI, subband phase from the second layer to the RI layer in the PMI, and a codeword corresponding CQI.

18. The terminal of claim 17, comprising:

and the second coding module is used for independently coding the broadband amplitude from the second layer to the RI layer in the PMI, jointly coding the strongest coefficient from the second layer to the RI layer in the PMI, the subband amplitude from the second layer to the RI layer in the PMI, the subband phase from the second layer to the RI layer in the PMI and the CQI corresponding to the redundant codeword and then sending the coded signals to the base station through the second uplink channel resource.

19. The terminal as claimed in claim 13, wherein when the RI has a value of 1, comprising:

20. A base station apparatus, comprising:

21. The base station apparatus of claim 20, wherein the rank-1 CSI information includes the RI, contents required to construct a precoding matrix with rank of 1, and a channel quality indication CQI corresponding to one codeword; and if the terminal needs to report the CSI-RS resource indication CRI, the rank 1CSI information also comprises the CRI.

22. The base station apparatus of claim 21, wherein the content required for constructing the precoding matrix with rank of 1 comprises:

23. The base station device of claim 20, wherein the remaining CSI information includes strongest coefficients from the second layer to the RI layer in the PMI, wideband amplitude from the second layer to the RI layer in the PMI, subband phase from the second layer to the RI layer in the PMI, and a codeword corresponding CQI.

24. The base station device of claim 20, wherein when the value of the RI is 1, the first CSI information is complete CSI information, comprising:

25. A method for feeding back Channel State Information (CSI), comprising:

26. The method of claim 25, wherein the rank-1 CSI information comprises the RI, contents required to construct a precoding matrix with rank of 1, and a channel quality indication CQI corresponding to one codeword; and if the terminal needs to report the CSI-RS resource indication CRI, the rank 1CSI information also comprises the CRI.

27. The method of claim 26, wherein the content required for constructing a precoding matrix with rank of 1 comprises:

28. The method of claim 27, wherein when the rank-1 CSI information comprises CRI, the terminal jointly encodes the CRI, the RI, and a wideband amplitude of a first layer in the PMI, and transmits the jointly encoded twiddle factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI, and the CQI to the base station through the first region.

29. The method of claim 25, wherein the remaining CSI information comprises strongest coefficients from second layer to RI layer in PMI, wideband amplitude from second layer to RI layer in PMI, subband phase from second layer to RI layer in PMI, and unnecessary codeword corresponding CQI.

30. The method of claim 29, wherein the terminal independently encodes wideband amplitudes from the second layer to the RI layer in the PMI, jointly encodes a strongest coefficient from the second layer to the RI layer in the PMI, a subband amplitude from the second layer to the RI layer in the PMI, a subband phase from the second layer to the RI layer in the PMI, and a CQI corresponding to a codeword unnecessary as the second CSI information, and sends the second CSI information to the base station through the second region.

31. The method as claimed in claim 25, wherein when the RI has a value of 1, comprising:

32. A method for resource allocation, comprising:

33. The method of claim 32, wherein the rank-1 CSI information comprises the RI, contents required to construct a precoding matrix with rank of 1, and a channel quality indication CQI corresponding to one codeword; and if the terminal needs to report the CSI-RS resource indication CRI, the rank 1CSI information also comprises the CRI.

34. The method of claim 33, wherein the content required for constructing a precoding matrix with rank of 1 comprises:

35. The method of claim 32, wherein the remaining CSI information comprises strongest coefficients from second layer to RI layer in PMI, wideband amplitude from second layer to RI layer in PMI, subband phase from second layer to RI layer in PMI, and unnecessary codeword corresponding CQI.

36. The method of claim 32, wherein the first CSI information is complete CSI information when the RI has a value of 1, comprising:

37. A terminal, comprising:

38. The terminal of claim 37, wherein the rank-1 CSI information comprises the RI, contents required for constructing a precoding matrix with rank of 1, and a channel quality indication CQI corresponding to one codeword, and the rank-1 CSI information further comprises a CRI if the terminal needs to report a CSI-RS resource indication CRI.

39. The terminal of claim 38, wherein the content required for constructing a precoding matrix with rank of 1 comprises:

40. The terminal of claim 39, comprising:

and a first encoding unit, configured to jointly encode the CRI, the RI, and a wideband amplitude of a first layer in the PMI when the rank-1 CSI information includes the CRI, and jointly encode a rotation factor in the PMI, a beam selection in the PMI, a strongest coefficient of the first layer in the PMI, a subband amplitude of the first layer in the PMI, a subband phase of the first layer in the PMI, and the CQI, and then send the encoded subband amplitude, subband phase, and CQI to the base station through the first region.

41. The terminal of claim 37, wherein the remaining CSI information comprises strongest coefficients from the second layer to the RI layer in the PMI, wideband amplitude from the second layer to the RI layer in the PMI, subband phase from the second layer to the RI layer in the PMI, and a codeword corresponding CQI.

42. The terminal of claim 41, comprising:

and the second coding unit is used for independently coding the wideband amplitudes from the second layer to the RI layer in the PMI, jointly coding the strongest coefficients from the second layer to the RI layer in the PMI, the subband amplitudes from the second layer to the RI layer in the PMI, the subband phases from the second layer to the RI layer in the PMI and the CQI corresponding to the redundant code word codeword as the second CSI information, and sending the second CSI information to the base station through the second region.

43. The terminal as claimed in claim 37, wherein when the RI has a value of 1, comprising:

44. A base station apparatus, comprising:

45. The base station device of claim 44, wherein the rank 1CSI information comprises the RI, contents required for constructing a precoding matrix with rank of 1, and a Channel Quality Indication (CQI) corresponding to one codeword; and if the terminal needs to report the CSI-RS resource indication CRI, the rank 1CSI information also comprises the CRI.

46. The base station apparatus of claim 45, wherein the content required for constructing the precoding matrix with rank of 1 comprises:

47. The base station device of claim 44, wherein the remaining CSI information includes strongest coefficients from the second layer to the RI layer in the PMI, wideband amplitude from the second layer to the RI layer in the PMI, subband phase from the second layer to the RI layer in the PMI, and a codeword corresponding CQI.

48. The base station device of claim 44, wherein when the RI has a value of 1, the first CSI information is complete CSI information, comprising: