CN106685497A

CN106685497A - Codebook restriction signaling transmitting and channel information quantized feedback method and device

Info

Publication number: CN106685497A
Application number: CN201510752526.XA
Authority: CN
Inventors: 陈艺戬; 李儒岳; 鲁照华; 肖华华; 蔡剑兴; 吴昊; 李永; 王瑜新
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-11-06
Filing date: 2015-11-06
Publication date: 2017-05-17
Anticipated expiration: 2035-11-06
Also published as: WO2017076330A1; CN106685497B

Abstract

The invention provides a codebook restriction signaling transmitting and channel information quantized feedback method and device. The codebook restriction signaling transmitting method comprises the steps that codebooks corresponding to different rank indications RI in channel information feedback are determined; the codebooks corresponding to different RI are grouped into preset number of groups according to the RI, wherein the preset number is greater than or equal to 2; the codebook restriction modes corresponding to the codebooks in the preset number of groups are determined, wherein the first number of groups in the preset number of groups adopt the first codebook restriction mode, the second number of groups in the preset number of groups adopt the second codebook restriction mode, and the first codebook restriction mode and the second codebook restriction mode are different; and codebook restriction signaling transmitting is performed according to the determined codebook restriction mode. The problem existing in the related technologies of high overhead caused by using the codebook restriction mode in the related technologies can be solved so as to achieve the effect of reducing the resource overhead of codebook restriction.

Description

Codebook restriction signaling sending method, channel information quantization feedback method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting codebook restriction signaling and quantizing feedback of channel information.

Background

In a wireless communication system, a transmitting end and a receiving end usually use multiple antennas in a spatial multiplexing manner to obtain a higher rate. Compared with a general spatial multiplexing method, an enhanced technology is that a receiving end feeds back channel information to a sending end, and the sending end uses a transmitting pre-coding technology according to the obtained channel information, so that the transmission performance can be greatly improved. For Single User-Multi-input Multi-output (SU-MIMO), precoding is directly performed by using channel feature vector information; for Multi-User Multi-input Multi-output (MU-MIMO), more accurate channel information is required.

In a wireless communication system, a transmitting end and a receiving end adopt a spatial multiplexing mode to use a plurality of antennas to obtain higher speed. Compared with a general spatial multiplexing method, an enhanced technology is that a receiving end feeds back channel information to a sending end, and the sending end uses a transmitting pre-coding technology according to the obtained channel information, so that the transmission performance can be greatly improved. For SU-MIMO, precoding is directly performed by using channel feature vector information; for MU-MIMO, relatively accurate channel information is required. In the third Generation Partnership Project (3rd Generation Partnership Project, abbreviated as 3GPP), Long Term Evolution (LTE) Project, feedback of channel information is mainly a feedback method using a simpler single codebook, and performance of MIMO transmit precoding technology depends more on accuracy of codebook feedback therein. The basic principle of codebook-based quantization feedback of channel information is briefly described as follows: assuming that the limited feedback channel capacity is B bps/Hz, the number of available codewords is N-2^BAnd (4) respectively. The characteristic vector space of the channel matrix is quantized to form a codebook spaceThe transmitting end and the receiving end jointly store or generate the codebook in real time(the transmitting end and the receiving end are the same). For each channel, H is realized, and the receiving end follows the codebook space according to a certain criterionSelects a code word which is matched with the channel to realize H bestAnd combining the code wordThe sequence number i (codeword sequence number) of (a) is fed back to the transmitting end. Here, the codeword number is referred to as a Precoding Matrix Indicator (PMI) in the codebook. The transmitting end finds out the corresponding pre-coding code word according to the sequence number iSo that the corresponding channel information is also obtained,the feature vector information of the channel is represented. Here, the channel H is generally obtained by performing channel measurement based on the channel measurement pilot.

In general, codebook spaceThe method can be further divided into a codebook corresponding to a plurality of queue ranks, and each Rank is corresponding to a plurality of code words to quantize a precoding matrix formed by channel feature vectors under the Rank. Since the number of Rank and non-zero eigenvector of a channel is equal, in general, a codeword has N columns when Rank is N. Therefore, the codebook spaceThe codebook may be divided into a plurality of sub-codebooks according to the Rank, as shown in table 1, table 1 is a schematic table of the codebook divided into a plurality of sub-codebooks according to the Rank.

TABLE 1

When Rank >1, the code words required to be stored are all in a matrix form, wherein a codebook in an LTE protocol is the feedback method for quantizing the codebook.

There are several forms of codebooks in LTE systems today:

form 1: a single PMI codebook format, such as Rel-8 version 4 antenna codebook; the form is that each code word under RI corresponds to one PMI index, as shown in table 2:

TABLE 2

	Index 0	Index 1		Index 15
					Layer/RI＝1	Code word 0	Code word 1	…	Code word 15
Layer/RI＝2	Code word 0	Code word 1	…	Code word 15
					Layer/RI＝3	Code word 0	Code word 1	…	Code word 15
Layer/RI＝4	Code word 0	Code word 1	…	Code word 15

Form 2: dual PMI codebook format, such as Rel-10 version 8 antenna codebook; the form is that each code word under RI corresponds to 2 PMI indexes, as shown in table 3:

TABLE 3

The Codebook Restriction (CSR) function is described below:

the main purpose of codebook restriction is to restrict the terminal from being able to use part of the codewords in the codebook for quantization feedback, which is equivalent to restrict the terminal to be able to use only a subset (subset) of the codebook agreed or configured in advance, and this technique has several advantages: on one hand, interference on adjacent cells caused by precoding corresponding to some code words reported by the terminal can be avoided; on the other hand, the complexity of UE code word selection can be reduced;

for the 2 different codebook forms, there are several different codebook restriction techniques, and for the form 1, the adopted CSR mode is that, using bitmap, each bit corresponds to each PMI index under each Rank Indication (RI for short)/layer and its corresponding codeword, and 0/1 states of bit are used to respectively represent that it can be used or not used;

for the form 2, due to the fact that the overhead reason is considered, codebook restriction is performed on PMI1 and PMI2 by means of high-level signaling respectively, a bitmap mode is also adopted, a first number of bits are used for corresponding to PMI1 indexes under each RI/layer and corresponding code words, and 0/1 states of the bits respectively represent that the bits can be used or cannot be used; using a second number of bits to correspond to the PMI2 index under each RI/layer and the corresponding code word thereof, wherein 0/1 states of the bits respectively represent that the bits can be used or can not be used; x is the sum of PMI1 indexes under each RI/layer, and Y is the sum of PMI2 indexes under each RI/layer.

However, with the development of technology, the codebook needs to adapt to the number of antennas with higher latitude, and because 3D spatial channel information feedback containing multiple dimension information needs to be supported, the number of PMIs fed back by the codebook is more and more, and in the increase of cost, the existing codebook restriction method is used, the signaling overhead is more and more, for example, in the form of a tri-PMI codebook, the value of i1,1 is 0 to 15, the value of i1,2 is 0 to 15, the value of i2 is 0 to 15, the form is that codewords under each RI correspond to 3 PMI indexes, and 45bit overhead is needed, if the codebook corresponding to each RI needs 45bit, and when multiple RIs exist, the signaling bit needs to be doubled; therefore, it can be found through analysis that if the previous codebook restriction method is followed, the codebook restriction is performed for each i1,1, i1,2, i2 under each RI, and the overhead is very large, since the signaling is configured for each UE, the excessive overhead should be avoided as much as possible.

Therefore, the codebook restriction method in the related art causes a problem of high overhead. And no effective solution has been proposed to address the problem in the related art.

Disclosure of Invention

The invention provides a method and a device for sending a codebook restriction signaling and quantitatively feeding back channel information, which at least solve the problem of high cost caused by adopting a codebook restriction mode in the related technology.

According to an aspect of the present invention, there is provided a method for transmitting codebook restriction signaling, including: determining codebooks corresponding to different rank indication RI during channel information feedback; dividing codebooks corresponding to the different RI into groups with a preset number according to the RI, wherein the preset number is more than or equal to 2; determining codebook limiting modes corresponding to codebooks in the groups with the preset number, wherein a first codebook limiting mode is adopted in a first group with the preset number, a second codebook limiting mode is adopted in a second group with the preset number, and the first codebook limiting mode and the second codebook limiting mode are different; and sending a codebook restriction signaling according to the determined codebook restriction mode.

Optionally, the first codebook limiting manner includes: code book limiting is carried out on code words in a code book corresponding to each RI in the first number of groups by adopting independent first signaling, wherein the first signaling is used for indicating limiting information of one or more code words in each RI in the first number of groups; and/or the second codebook limiting mode comprises the following steps: and performing codebook restriction on the codebooks in the groups of the second number by using M second signaling, wherein a signaling bit in each second signaling simultaneously indicates restriction information of codewords in the codebooks corresponding to one or more RIs in the groups of the second number, and M is an integer greater than or equal to 1.

Optionally, performing codebook restriction on the codebook corresponding to each RI in the first number of groups by using an independent first signaling respectively includes at least one of: respectively adopting a first bitmap signaling to limit the code words in any codebook in each RI in the first number of groups; and respectively limiting the values of more than two indexes corresponding to the code words in any codebook in each RI in the first quantity of groups by adopting a second bitmap signaling.

Optionally, the second codebook restriction manner further includes at least one of: and codebook restriction is performed on the codebooks in the second number of groups by using N third signaling, wherein each third signaling is used for indicating restriction information of all the codewords in the codebook corresponding to one RI in the second number of groups, and N is an integer greater than or equal to 1.

Optionally, the first number of groups includes one or more groups made of codebooks corresponding to RIs whose RI values are greater than 2, and the second number of groups includes one or more groups made of codebooks corresponding to RIs whose RI values are less than or equal to 2; or, the first number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are less than or equal to 4.

Optionally, when the first number of groups includes one or more groups made of codebooks corresponding to RIs whose RI values are greater than 2, and the second number of groups includes one or more groups made of codebooks corresponding to RIs whose RI values are less than or equal to 2, the following is included: the first number of groups includes groups of codebooks corresponding to RIs with RI values of 3 and 4, and the first number of groups includes groups of codebooks corresponding to RIs with RI values of 1 and 2; the first number of groups includes groups of codebooks corresponding to RIs having RI values of 3,4,5,6,7, and 8, and the second number of groups includes groups of codebooks corresponding to RIs having RI values of 1 and 2; the first number of groups includes a group of codebooks corresponding to RIs with RI values of 3 and 4 and a group of codebooks corresponding to RIs with RI values of 5,6,7 and 8, and the second number of groups includes a group of codebooks corresponding to RIs with RI values of 1 and 2; when the first number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are less than or equal to 4, the first number of groups includes groups of codebooks corresponding to RIs whose RI values are 5,6,7 and 8, and the second number of groups includes groups of codebooks corresponding to RIs whose RI values are 1,2,3 and 4.

Optionally, the method comprises at least one of: determining codebooks corresponding to different rank indication RI when channel information is fed back comprises: saving codebooks corresponding to different rank indication RI according to a mode appointed by the terminal, or generating the codebooks corresponding to the different rank indication RI according to codebook parameter configuration information of the base station and the mode appointed by the terminal; dividing the codebooks corresponding to the different RIs into groups of a predetermined number according to the RI includes: dividing the codebooks corresponding to the different RI into the groups with the preset number according to the grouping mode appointed by the terminal and the RI; determining a codebook restriction mode corresponding to the codebooks in the predetermined number of groups comprises: and determining a codebook limiting mode corresponding to the codebooks in the groups of the preset number according to a grouping mode appointed by the terminal.

According to another aspect of the present invention, there is provided a method for quantizing feedback of channel information, including: determining codebooks corresponding to different rank indication RI during channel information feedback; dividing codebooks corresponding to the different RI into groups with a preset number according to the RI, wherein the preset number is more than or equal to 2; determining codebook limiting modes corresponding to codebooks in the groups with the preset number, wherein a first codebook limiting mode is adopted in a first group with the preset number, a second codebook limiting mode is adopted in a second group with the preset number, and the first codebook limiting mode and the second codebook limiting mode are different; determining an available codebook subset according to the determined codebook limiting mode and a codebook limiting signaling received from a base station in advance; and carrying out quantitative feedback on the channel information according to the determined available codebook subset.

Optionally, the method comprises at least one of: determining codebooks corresponding to different rank indication RI when channel information is fed back comprises: saving codebooks corresponding to different rank indication RI according to a mode appointed by a base station, or generating the codebooks corresponding to the different rank indication RI according to codebook parameter configuration information of the base station and the mode appointed by the base station; dividing the codebooks corresponding to the different RIs into groups of a predetermined number according to the RI includes: dividing the codebooks corresponding to the different RIs into the groups with the preset number according to the grouping mode appointed by the base station and the RI; determining a codebook restriction mode corresponding to the codebooks in the predetermined number of groups comprises: and determining a codebook limiting mode corresponding to the codebooks in the groups of the preset number according to a grouping mode appointed by the base station.

According to another aspect of the present invention, there is provided a transmitting apparatus of codebook restriction signaling, including: the first determining module is used for determining codebooks corresponding to different rank indication RI during channel information feedback; a first dividing module, configured to divide the codebooks corresponding to the different RIs into groups of a predetermined number according to the RI, where the predetermined number is greater than or equal to 2; a second determining module, configured to determine codebook restriction manners corresponding to codebooks in the predetermined number of groups, where a first number of groups in the predetermined number of groups employ a first codebook restriction manner, a second number of groups in the predetermined number of groups employ a second codebook restriction manner, and the first codebook restriction manner and the second codebook restriction manner are different; and the sending module is used for sending the codebook restriction signaling according to the determined codebook restriction mode.

Optionally, at least one of the following is also included: the first determining module includes: the first determining unit is used for storing codebooks corresponding to different rank indication RI according to a mode appointed by the terminal, or generating the codebooks corresponding to the different rank indication RI according to codebook parameter configuration information of the base station and the mode appointed by the terminal; the first division module includes: a first dividing unit, configured to divide the codebooks corresponding to the different RIs into the groups of the predetermined number according to the RI in a grouping manner agreed with a terminal; the second determining module includes: and a second determining unit, configured to determine, according to a grouping manner agreed by the terminal, a codebook restriction manner corresponding to the codebook in the group of the predetermined number.

According to another aspect of the present invention, there is provided a quantization feedback apparatus of channel information, comprising: a third determining module, configured to determine codebooks corresponding to different rank indication RIs during channel information feedback; a second dividing module, configured to divide the codebooks corresponding to the different RIs into groups of a predetermined number according to the RI, where the predetermined number is greater than or equal to 2; a fourth determining module, configured to determine codebook restriction manners corresponding to codebooks in the predetermined number of groups, where a first number of groups in the predetermined number of groups employ a first codebook restriction manner, a second number of groups in the predetermined number of groups employ a second codebook restriction manner, and the first codebook restriction manner and the second codebook restriction manner are different; a fifth determining module, configured to determine an available codebook subset according to the determined codebook restriction mode and a codebook restriction signaling received in advance from the base station; and the feedback module is used for carrying out quantitative feedback on the channel information according to the determined available codebook subset.

Optionally, the first number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 2; and/or the second number of groups comprises one or more groups consisting of codebooks corresponding to RI with RI values less than or equal to 2; or, the first number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are less than or equal to 4.

Optionally, the apparatus comprises at least one of: the third determining module includes: a third determining unit, configured to store codebooks corresponding to different rank indication RIs according to a manner agreed with the base station, or generate codebooks corresponding to different rank indication RIs according to codebook parameter configuration information of the base station and the manner agreed with the base station; the second dividing module includes: a second dividing unit, configured to divide the codebooks corresponding to the different RIs into the groups of the predetermined number according to the RI in a grouping manner agreed with the base station; the fourth determining module includes: and a fourth determining unit, configured to determine, according to a grouping manner agreed by the base station, a codebook restriction manner corresponding to the codebooks in the predetermined number of groups.

According to the invention, codebooks corresponding to different rank indication RI are determined when channel information is fed back; dividing codebooks corresponding to the different RI into groups with a preset number according to the RI, wherein the preset number is more than or equal to 2; determining codebook limiting modes corresponding to codebooks in the groups with the preset number, wherein a first codebook limiting mode is adopted in a first group with the preset number, a second codebook limiting mode is adopted in a second group with the preset number, and the first codebook limiting mode and the second codebook limiting mode are different; and sending a codebook restriction signaling according to the determined codebook restriction mode. The problem that the adoption of a codebook limiting mode in the related technology causes high overhead in the related technology is solved, and the effect of reducing the resource overhead in codebook limiting is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of a method for transmitting codebook restriction signaling according to an embodiment of the present invention;

fig. 2 is a flowchart of a quantization feedback method of channel information according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating the relationship between basis vectors and codewords in a Rank1,2,3,4 codebook according to an embodiment of the present invention;

fig. 4 is a first diagram illustrating an application example of a block codebook restriction method according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating the relationship between basis vectors and codewords in a Rank1-8 codebook according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an application example of the packet codebook restriction method according to the embodiment of the present invention;

fig. 7 is a schematic diagram of an application example of a packet codebook restriction method according to an embodiment of the present invention;

fig. 8 is a diagram illustrating a fourth example of the application of the packet codebook restriction method according to the embodiment of the present invention;

fig. 9 is a schematic diagram of codebook restriction signaling according to an embodiment of the present invention;

fig. 10 is a block diagram of a transmitting apparatus of codebook restriction signaling according to an embodiment of the present invention;

fig. 11 is a block diagram of the structures of the first determining module 102, the first dividing module 104, and the second determining module 106 in the apparatus for transmitting codebook restriction signaling according to the embodiment of the present invention;

fig. 12 is a block diagram of a quantization feedback apparatus of channel information according to an embodiment of the present invention;

fig. 13 is a block diagram illustrating the structures of the third determining module 122, the second dividing module 124, and the fourth determining module 126 in the apparatus for quantizing and feeding back channel information according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In this embodiment, a method for sending codebook restriction signaling is provided, and fig. 1 is a flowchart of a method for sending codebook restriction signaling according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

step S102, determining codebooks corresponding to different rank indication RI during channel information feedback;

step S104, dividing codebooks corresponding to different RI into groups with a preset number according to the RI, wherein the preset number is more than or equal to 2;

step S106, determining codebook limiting modes corresponding to codebooks in the groups with the preset number, wherein a first codebook limiting mode is adopted in a first group with the preset number, a second codebook limiting mode is adopted in a second group with the preset number, and the first codebook limiting mode and the second codebook limiting mode are different;

and step S108, transmitting a codebook restriction signaling according to the determined codebook restriction mode.

Through the steps, when the codebook limiting mode is determined, different codebook limiting modes can be adopted for groups formed by different codebooks, so that the codebook can be limited in a targeted mode, the resource overhead during codebook limiting is reduced, the problem that the overhead is large due to the adoption of the codebook limiting mode in the related technology is solved, and the effect of reducing the resource overhead during codebook limiting is achieved.

In an optional embodiment, the first codebook limiting method includes: code book limitation is carried out on code words in a code book corresponding to each RI in the first number of groups by adopting independent first signaling, wherein the first signaling is used for indicating limitation information of one or more code words in each RI in the first number of groups; and/or, the second codebook limiting manner includes: and carrying out codebook restriction on the codebooks in the groups with the second quantity by using M second signaling, wherein a signaling bit in each second signaling simultaneously indicates restriction information of the codewords in the codebooks corresponding to one or more RI in the groups with the second quantity, and M is an integer greater than or equal to 1. Therefore, when the second codebook restriction method is adopted, one second signaling can be used to simultaneously indicate the restriction information of the codewords in the codebooks corresponding to the multiple RIs, so that the number of the signaling is reduced, and the resource overhead is saved.

In an optional embodiment, performing codebook restriction on the codebook corresponding to each RI in the first number of groups by using an independent first signaling respectively includes at least one of: respectively adopting first bitmap signaling to limit the code words in any codebook in each RI in the first number of groups; and respectively limiting the values of more than two indexes corresponding to the code words in any codebook in each RI in the first quantity of groups by adopting a second bitmap signaling.

In an alternative embodiment, the second codebook restriction mode may include at least one of: and codebook restriction is carried out on the codebooks in the second quantity of groups by using N third signaling, wherein each third signaling is used for indicating restriction information of all the codewords in the codebook corresponding to one RI in the second quantity of groups, and N is an integer greater than or equal to 1. In another optional embodiment, the codebooks in the second number of groups may further be restricted by using X fourth signaling, where each fourth signaling is used to indicate restriction information of Q codeword indexes of a codeword in a codebook corresponding to one RI in the second number of groups, X is an integer greater than or equal to 1, and Q is an integer greater than or equal to 1. Of course, the above-described second codebook limiting modes are only examples, and other modes can be adopted.

In an optional embodiment, the first number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 2 or the second number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are less than or equal to 2; or, the first number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are less than or equal to 4.

In an optional embodiment, when the first number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are greater than 2, and the second number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are less than or equal to 2, the following one is included: the first number of groups includes groups made up of codebooks corresponding to RIs whose RI values are 3 and 4, and the first number of groups includes groups made up of codebooks corresponding to RIs whose RI values are 1 and 2; the first number of groups includes groups of codebooks corresponding to RIs having RI values of 3,4,5,6,7, and 8, and the second number of groups includes groups of codebooks corresponding to RIs having RI values of 1 and 2; the first number of groups includes groups consisting of codebooks corresponding to RIs having RI values of 3 and 4 and groups consisting of codebooks corresponding to RIs having RI values of 5,6,7 and 8, and the second number of groups includes groups consisting of codebooks corresponding to RIs having RI values of 1 and 2; in another optional embodiment, when the first number of groups include one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups include one or more groups composed of codebooks corresponding to RIs whose RI values are less than or equal to 4, the first number of groups include groups composed of codebooks corresponding to RIs whose RI values are 5,6,7 and 8, and the second number of groups include groups composed of codebooks corresponding to RIs whose RI values are 1,2,3 and 4.

In an alternative embodiment, the method comprises at least one of: determining codebooks corresponding to different rank indication RI when channel information is fed back comprises: saving codebooks corresponding to different rank indication RI according to a mode appointed by the terminal, or generating the codebooks corresponding to the different rank indication RI according to codebook parameter configuration information of the base station and the mode appointed by the terminal; dividing the codebooks corresponding to the different RIs into groups of a predetermined number according to the RIs includes: dividing codebooks corresponding to different RI into groups with a preset number according to the grouping mode appointed by the terminal and the RI; determining a codebook restriction mode corresponding to the codebook in the predetermined number of groups includes: and determining a codebook limiting mode corresponding to the codebooks in the groups with the preset number according to the grouping mode appointed by the terminal. The above-mentioned grouping of different RI-corresponding codebooks into a predetermined number of groups according to RI may be grouping the codebooks corresponding to RI according to the values of RI, for example, the codebook corresponding to RI 1 and the codebook corresponding to RI 2 are grouped into a first group, and the codebooks corresponding to RI 3,4,5,6,7, and 8 are grouped into a second group.

The execution subject in the above embodiments may be a base station.

Fig. 2 is a flowchart of a method for quantizing and feeding back channel information according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps:

step S202, determining codebooks corresponding to different rank indication RI during channel information feedback;

step S204, dividing codebooks corresponding to different RI into groups with a preset number according to the RI, wherein the preset number is more than or equal to 2;

step S206, determining codebook limiting modes corresponding to codebooks in the groups with the preset number, wherein a first codebook limiting mode is adopted in a first group with the preset number, a second codebook limiting mode is adopted in a second group with the preset number, and the first codebook limiting mode and the second codebook limiting mode are different;

step S208, determining an available codebook subset according to the determined codebook limiting mode and a codebook limiting signaling received from the base station in advance;

step S210, performing quantization feedback on the channel information according to the determined available codebook subset.

In an optional embodiment, the first codebook limiting method includes: code book limitation is carried out on code words in a code book corresponding to each RI in the first number of groups by adopting independent first signaling, wherein the first signaling is used for indicating limitation information of one or more code words in each RI in the first number of groups; in another alternative embodiment, the second codebook limiting method includes: and performing codebook restriction on the codebooks in the groups of the second number by using M second signaling, wherein a signaling bit in each second signaling simultaneously indicates restriction information of the codewords in the codebooks corresponding to one or more RIs in the groups of the second number, and M is an integer greater than or equal to 1. Therefore, when the second codebook restriction method is adopted, one second signaling can be used to simultaneously indicate the restriction information of the codewords in the codebooks corresponding to the multiple RIs, so that the number of the signaling is reduced, and the resource overhead is saved.

In an optional embodiment, the second codebook restriction means further includes at least one of: and carrying out codebook restriction on the codebooks in the second quantity of groups by using N third signaling, wherein each third signaling is used for indicating restriction information of all the codewords in the codebook corresponding to one RI in the second quantity of groups, and N is an integer greater than or equal to 1.

In an optional embodiment, the first number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are greater than 2, and the second number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are less than or equal to 2; or, the first number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are less than or equal to 4.

In an alternative embodiment, the method comprises at least one of: determining codebooks corresponding to different rank indication RI when channel information is fed back comprises: saving codebooks corresponding to different rank indication RI according to a mode appointed by the base station, or generating the codebooks corresponding to the different rank indication RI according to codebook parameter configuration information of the base station and the mode appointed by the base station; dividing the codebooks corresponding to the different RIs into a predetermined number of groups according to the RI includes: dividing codebooks corresponding to different RIs into groups with a preset number according to the RI in a grouping mode appointed by a base station; determining a codebook restriction mode corresponding to a codebook in a predetermined number of groups includes: and determining a codebook limiting mode corresponding to the codebooks in the groups with the preset number according to the grouping mode appointed by the base station. The above-mentioned grouping of different RI-corresponding codebooks into a predetermined number of groups according to RI may be grouping of the codebooks corresponding to RI according to the values of RI, for example, a codebook corresponding to RI 1 and a codebook corresponding to RI 2 are grouped into a first group, and codebooks corresponding to RI 3,4,5,6,7, and 8 are grouped into a second group.

The execution subject in the above embodiments may be a terminal.

The following describes the processing in the base station and the terminal with reference to specific embodiments:

first, a description will be given of a correlation process in a base station:

example 1

The base station and the terminal jointly store the codebooks corresponding to RI/layer 1 and 2 … … r (corresponding to the different codebooks corresponding to RI) in an agreed mode, or the base station generates the codebooks corresponding to RI/layer 1 and 2 … … r according to the codebook parameter configuration information of the base station and the agreed mode with the terminal;

embodiment modes 1 to 1:

the base station and the terminal agree on a fixed main codebook cb (r), for example, an 8Tx codebook (dual PMI codebook, each codeword has 2 indexes) as follows, where only RI/layer υ is listed as 1,2 for explanation; the following variables (scalars/vectors) are defined:

φ_n＝e^jπn/2,v_m＝[1 e^j2πm/32e^j4πm/32e^j6πm/32]^T

defining a Rank1 code word based on the variables, a Rank1 code word model and a codebook:as shown in the table 4 below, the following examples,

TABLE 4

Defining a Rank2 code word based on the variables, the code word model and the codebook:as shown in the table 5 below, the following examples,

TABLE 5

Other codebooks corresponding to RI/layer values are similar to the above;

embodiment modes 1 to 2:

a base station configures a codebook to generate parameters, and the base station and the terminal parameter the codebook according to an appointed mode;

here, a codebook with RI/Layer being 1,2 is taken as an example, and codebooks with other RI/Layer values are similar to the above; because the occurrence proportion of the low Rank is much larger than that of the high Rank, the number of the code words is generally less under the condition of the high Rank/layer;

the codebook generation method of RI/Layer ═ 1 is shown in table 6:

TABLE 6

It can be seen that for table 6, there are 3 indices that collectively determine each codeword, i1,1, i1,2, i2, respectively, where, parameters such as N1, N2, O1, O2, etc. are configured by the base station, the base station may also configure a sub codebook, and candidate configs are shown in table 7; s1, s2 represents the spacing of 2 patterns that are horizontally or vertically adjacent in two dimensions;

TABLE 7

The codebook generation method of RI/Layer ═ 2 is shown in table 8:

TABLE 8

In Table 8, i'₂And i_1,1，i_1,2The correspondence is as follows:

i_1,1＝0,1,…,O₁N₁/s₁-1，i_1,2＝0,1,…,O₂N₂/s₂-1，p₁＝1and p₂＝1

a sub-codebook may be configured, with candidate configs as shown in table 9; s1, s2 represents the spacing of 2 patterns that are horizontally or vertically adjacent in two dimensions;

TABLE 9

Config	Selected i′₂indices	(s1,s2)
			Config 1	0-1	(1,1)
Config 2	0-3,8-9,16-19,22-23,28-31	(2,2)
			Config 3	0-1,4-5,8-9,12-13,18-21,24-27	(2,2)
Config 4	0-15	(2,2)

Example 2:

the base station divides a codebook corresponding to RI/layer 1 and 2 … … R into N groups; n is an integer of > 2; r is an integer and represents the maximum value of RI/layer;

embodiment mode 2-1:

each terminal determines a maximum RI reporting range according to the capability of the UE and/or the configuration of the base station, wherein the maximum RI is 2, the maximum RI is 4 and the maximum RI is 8;

if RI max 4, it can be divided into 2 groups:

preferably, the codebook corresponding to RI/layer {1,2} is a group, and the codebook corresponding to RI/layer {3,4} is a group;

if RI max 8, it can be divided into 2 groups:

preferably, the codebook corresponding to RI/layer {1,2} is a group, and the codebook corresponding to RI/layer {3,4,5,6,7,8} is a group;

preferably, the codebook corresponding to RI/layer {1,2,3,4} is a group, and the codebook corresponding to RI/layer {5,6,7,8} is a group;

if RI max 8, it can be divided into 3 groups:

preferably, the set of codebooks for RI/layer {1,2}, the set of codebooks for RI/layer {3,4}, and the set of codebooks for RI/layer {5,6,7,8} are used.

Example 3:

determining a codebook restriction mode according to the N codebook groups;

embodiment mode 3-1:

the codebooks associated with RI/layer {1,2} are in a first group (the first group corresponding to a group of codebooks in said second number of groups), the codebooks associated with RI/layer {3,4} are in a second group (the second group corresponding to a group of codebooks in said first number of groups);

group 1 used the following:

limiting the DFT vector for constructing the code word; through analysis, the codebooks in the embodiment 1 have a characteristic that: a set S of basic vectors is constructed, and the code words in the codebook under each RI are constructed by finding one or more vectors in S and combining different values of some phase deflections. The relationship can be expressed as shown in fig. 3, fig. 3 is a schematic diagram of the relationship between the base vector and the code word in the Rank1,2,3,4 codebook according to the embodiment of the present invention:

because of the relationship, different from the prior art, a bitmap signaling can be used to indicate the selection/limitation of the basic vector, and specify the codeword limitation relationship in the codebook corresponding to each RI corresponding to the limitation of the basic vector, fig. 4 is a schematic diagram of an application example of the block codebook limitation method according to the embodiment of the present invention, for example, limiting a certain basic vector in fig. 4 makes all codewords used to the basic vector in the codebook corresponding to each RI limited, so as to achieve the effect of saving codebook limitation signaling overhead; this way can also further indicate the information of RI value restriction in this RI group, if a certain RI is restricted, all code words of the code book corresponding to this RI can not be used;

group 2 may employ a mode of performing codebook restriction on codewords in the codebook corresponding to each RI; two cases are included:

the first case is that each code word is respectively selected/limited by adopting a corresponding code book limiting signaling;

the second case is that a plurality of PMIs corresponding to each code word are respectively selected/limited and indicated by adopting a codebook limiting signaling;

embodiment mode 3-2:

the codebooks associated with RI/layer {1,2} are in a first group (the first group corresponds to the codebook group in the second number of groups), and the codebooks associated with RI/layer {3,4,5,6,7,8} are in a second group (the second group corresponds to the codebook group in the first number of groups);

group 1 used the following:

limiting the DFT vector for constructing the code word; through analysis, the codebooks in the embodiment 1 have a characteristic that: a set S of basic vectors is constructed, and the code words in the codebook under each RI are constructed by finding one or more vectors in S and combining different values of some phase deflections. The relationship can be represented as fig. 5, and fig. 5 is a schematic diagram illustrating the relationship between the base vector and the code word in the Rank1-8 codebook according to the embodiment of the present invention.

Because of the relationship, different from the prior art, we can use bitmap signaling to indicate the selection/limitation of the basic vector, and specify the codeword limitation relationship in the codebook corresponding to each RI corresponding to the limitation of the basic vector, for example, limiting a certain basic vector in fig. 6 makes all the codewords used to the basic vector in the codebook corresponding to each RI limited, so as to achieve the effect of saving the codebook limitation signaling overhead; as shown in fig. 6, fig. 6 is a schematic diagram of a second example of the application of the packet codebook restriction method according to the embodiment of the present invention.

detailed description of preferred embodiments 3 to 3

group 1 used the following: limiting the DFT vector for constructing the code word; through analysis, the codebooks in the embodiment 1 have a characteristic that: a set S of basic vectors is constructed, and the code words in the codebook under each RI are constructed by finding one or more vectors in S and combining different values of some phase deflections. The relationship can be represented as fig. 3.

Because of the relationship, different from the prior art, we can use bitmap signaling to indicate the selection/limitation of the basic vector, and specify the codeword limitation relationship in the codebook corresponding to each RI corresponding to the limitation of the basic vector, for example, limiting a certain basic vector in fig. 7 makes all the codewords used to the basic vector in the codebook corresponding to each RI limited, so as to achieve the effect of saving the codebook limitation signaling overhead; as shown in fig. 7, fig. 7 is a schematic diagram of a third application example of the packet codebook restriction method according to the embodiment of the present invention.

embodiment modes 3 to 4:

the codebooks corresponding to RI/layer {1,2} are in a first group (the first group corresponds to the codebook group in the second number of groups), the codebooks corresponding to RI/layer {3,4} are in a second group, and the codebooks corresponding to RI/layer {5,6,7,8} are in a third group (the second and third groups correspond to the codebook groups in the first number of groups);

group 1 used the following:

limiting the DFT vector for constructing the code word; through analysis, the codebooks in the embodiment 1 have a characteristic that: a set S of basic vectors is constructed, and the code words in the codebook under each RI are constructed by finding one or more vectors in S and combining different values of some phase deflections. The relationship can be represented as shown in fig. 3.

Because of the relationship, different from the prior art, we can use bitmap signaling to indicate the selection/limitation of the basic vector, and specify the codeword limitation relationship in the codebook corresponding to each RI corresponding to the limitation of the basic vector, for example, limiting a certain basic vector in fig. 8 makes all the codewords used to the basic vector in the codebook corresponding to each RI limited, thereby achieving the effect of saving the codebook limitation signaling overhead; as shown in fig. 8, fig. 8 is a diagram of a fourth example of the application of the packet codebook restriction method according to the embodiment of the present invention.

The group 2 and the group 3 may adopt a mode of respectively performing codebook restriction on the code words in the codebook corresponding to each RI; two sub-methods are included: the first condition is that each code word is respectively selected/limited by adopting a corresponding code book limiting signaling, and the second condition is that a plurality of PMIs corresponding to each code word are respectively selected/limited by adopting the code book limiting signaling; and the groups 2 and 3 adopt one of the sub-methods for codebook restriction respectively.

Embodiment modes 3 to 5:

for the foregoing embodiments 3-1, 3-2, 3-3, 3-4, for the first group of codebooks, in addition to the above manner, a type of codebook restriction signaling may be added for further restriction;

the reason for this is that the above restriction can be made only for the base vector, and the phase when the code word is constructed from the base vector cannot be restricted, so that the index corresponding to a part of PMIs among the PMIs corresponding to the code word can be further restricted;

for example, one codeword corresponds to 3 PMIs, i1,1, i1,2, i2, and a limit corresponding to an index value corresponding to i2 may be added;

in this embodiment, the method for restricting different codebooks for different groups may be designed for each RI-lower codebook: for example, the overhead size, the quantization precision and the like perform a better compromise between the codebook restriction flexibility and the overhead according to the actual codebook design condition and the application scene.

Example 4:

and sending a codebook restriction signaling according to the determined codebook restriction mode:

after the codebook restriction method is determined, the codebook restriction signaling bit overhead and the corresponding meaning of each bit can be determined according to the previous method;

the base station determines some basic vectors and code words which are expected to be limited, and selects or limits the code words by adopting the signaling;

the base vector and the codeword for which the restriction is desired depend on the interference to the neighbor cells, the probability that the codeword is used by the current channel, etc.

Then, the relevant processing in the terminal is explained:

example 5:

the terminal and the base station jointly store a codebook corresponding to RI/layer 1 and 2 … … r according to an agreed mode; or the terminal generates a codebook corresponding to RI/layer 1 and 2 … … r according to the codebook parameter configuration information of the base station and a mode appointed by the base station;

reference may be made specifically to example 1.

Example 6:

the terminal and the base station agree on the grouping mode of the code book corresponding to RI/layer 1,2 … … R, and the code book corresponding to RI/layer 1,2 … … R is divided into N groups; n is an integer of > 2; r is an integer and represents the maximum value of RI/layer;

the grouping method of the terminal is the same as the base station convention, and the specific grouping strategy can refer to embodiment 2.

Example 7:

determining a codebook limiting mode corresponding to the N codebook groups;

the terminal and the base station agree on the codebook restriction method used by each group, and the codebook restriction method used by each group may refer to embodiment 3.

Example 8:

the terminal determines an available codebook subset according to the determined codebook limiting mode and the codebook limiting signaling sent by the base station;

fig. 9 is a schematic diagram of codebook restriction signaling according to an embodiment of the present invention, where the codebook restriction signaling may be a segment of bitmap signaling shown in (a), (b), or (c) in fig. 9, and each segment of bit corresponds to a different codebook restriction meaning.

Example 9:

and performing quantitative feedback on channel information by adopting the codebook subset:

after the codebook restriction information is acquired, the terminal can determine which codewords are available, form a subset of the original codebook by using the codewords, quantize the channel information by using the codewords in the subset, and feed back the selected codewords to the base station by using the SINR (signal to interference plus noise ratio) most criterion, which is the same as the existing CSI quantization feedback technology.

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

In this embodiment, a device for sending a codebook restriction signaling is further provided, where the device is used to implement the foregoing embodiment and preferred embodiments, and details are not repeated for what has been described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 10 is a block diagram of a transmitting apparatus for codebook restriction signaling according to an embodiment of the present invention, and as shown in fig. 10, the apparatus includes a first determining module 102, a first dividing module 104, a second determining module 106, and a transmitting module 108, which will be described below.

A first determining module 102, configured to determine codebooks corresponding to different rank indicators RI during channel information feedback; a first dividing module 104, connected to the first determining module 102, configured to divide codebooks corresponding to different RIs into groups of a predetermined number according to the RIs, where the predetermined number is greater than or equal to 2; a second determining module 106, connected to the first dividing module 104, configured to determine codebook restriction manners corresponding to codebooks in the predetermined number of groups, where a first number of groups in the predetermined number of groups adopts a first codebook restriction manner, a second number of groups in the predetermined number of groups adopts a second codebook restriction manner, and the first codebook restriction manner and the second codebook restriction manner are different; a sending module 108, connected to the second determining module 106, for sending the codebook restriction signaling according to the determined codebook restriction mode.

In an optional embodiment, the first codebook limiting method includes: code book limitation is carried out on code words in a code book corresponding to each RI in the first number of groups by adopting independent first signaling, wherein the first signaling is used for indicating limitation information of one or more code words in each RI in the first number of groups; in another alternative embodiment, the second codebook limiting method includes: and carrying out codebook restriction on the codebooks in the groups with the second quantity by using M second signaling, wherein a signaling bit in each second signaling simultaneously indicates restriction information of the codewords in the codebooks corresponding to one or more RI in the groups with the second quantity, and M is an integer greater than or equal to 1.

In an optional embodiment, the first number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are greater than 2; and/or the second number of groups comprises one or more groups consisting of codebooks corresponding to RIs with RI values less than or equal to 2; or, the first number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are less than or equal to 4.

Fig. 11 is a block diagram of the structures of the first determining module 102, the first dividing module 104, and the second determining module 106 in the apparatus for sending codebook restriction signaling according to the embodiment of the present invention, and the following describes each module with reference to fig. 11:

the first determination module 102 includes: a first determining unit 112, configured to store codebooks corresponding to different rank indication RIs according to a manner agreed with the terminal, or generate codebooks corresponding to different rank indication RIs according to codebook parameter configuration information of the base station and the manner agreed with the terminal; or,

the first division module 104 includes: a first dividing unit 114, configured to divide codebooks corresponding to different RIs into groups of a predetermined number according to the RIs in a grouping manner agreed with the terminal; or,

the second determination module 106 includes: a second determining unit 116, configured to determine a codebook restriction mode corresponding to a codebook in a predetermined number of groups according to a grouping mode agreed by the terminal.

Fig. 12 is a block diagram of a quantization feedback apparatus for channel information according to an embodiment of the present invention, and as shown in fig. 12, the apparatus includes a third determining module 122, a second dividing module 124, a fourth determining module 126, a fifth determining module 128, and a feedback module 1210, and the apparatus is explained as follows:

a third determining module 122, configured to determine codebooks corresponding to different rank indicators RI during channel information feedback; a second dividing module 124, connected to the third determining module 122, configured to divide codebooks corresponding to different RIs into groups of a predetermined number according to the RIs, where the predetermined number is greater than or equal to 2; a fourth determining module 126, connected to the second dividing module 124, configured to determine codebook restriction manners corresponding to codebooks in a predetermined number of groups, where a first number of groups in the predetermined number of groups adopts a first codebook restriction manner, a second number of groups in the predetermined number of groups adopts a second codebook restriction manner, and the first codebook restriction manner and the second codebook restriction manner are different; a fifth determining module 128, connected to the fourth determining module 126, for determining an available codebook subset according to the determined codebook restriction mode and a codebook restriction signaling received from the base station in advance; a feedback module 1210, connected to the fifth determining module 128, configured to perform quantization feedback on the channel information according to the determined available codebook subset.

Fig. 13 is a block diagram of the structures of the third determining module 122, the second dividing module 124, and the fourth determining module 126 in the apparatus for quantizing and feeding back channel information according to the embodiment of the present invention, and the following describes the modules:

the third determination module 122 includes: a third determining unit 132, configured to store codebooks corresponding to different rank indication RIs according to a manner agreed with the base station, or generate codebooks corresponding to different rank indication RIs according to codebook parameter configuration information of the base station and the manner agreed with the base station; or,

the second division module 124 includes: a second dividing unit 134, configured to divide the codebooks corresponding to the different RIs into the groups of the predetermined number according to the RI in a grouping manner agreed by the base station; or,

the fourth determination module 126 includes: a fourth determining unit 136, configured to determine a codebook restriction mode corresponding to the codebook in the group of the predetermined number according to a grouping mode agreed by the base station.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s11, determining codebooks corresponding to different rank indication RI when channel information is fed back;

s12, dividing codebooks corresponding to different RI into groups with a preset number according to the RI, wherein the preset number is more than or equal to 2;

s13, determining codebook restriction modes corresponding to codebooks in the predetermined number of groups, wherein a first number of groups in the predetermined number of groups adopts a first codebook restriction mode, a second number of groups in the predetermined number of groups adopts a second codebook restriction mode, and the first codebook restriction mode and the second codebook restriction mode are different;

and S14, transmitting the code book limiting signaling according to the determined code book limiting mode.

Optionally, the storage medium is further arranged to store program code for performing the steps of:

s21, determining codebooks corresponding to different rank indication RI when channel information is fed back;

s22, dividing codebooks corresponding to different RI into groups with a preset number according to the RI, wherein the preset number is more than or equal to 2;

s23, determining codebook restriction modes corresponding to codebooks in the predetermined number of groups, wherein a first number of groups in the predetermined number of groups adopts a first codebook restriction mode, a second number of groups in the predetermined number of groups adopts a second codebook restriction mode, and the first codebook restriction mode and the second codebook restriction mode are different;

s24, determining available codebook subsets according to the determined codebook limiting mode and the codebook limiting signaling received in advance from the base station;

and S25, performing quantization feedback on the channel information according to the determined available codebook subset.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Alternatively, in the present embodiment, the processor performs the above steps S11-S14 according to program codes already stored in the storage medium.

Alternatively, in the present embodiment, the processor performs the above steps S21-S25 according to program codes already stored in the storage medium.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for transmitting codebook restriction signaling, comprising:

determining codebooks corresponding to different rank indication RI during channel information feedback;

dividing codebooks corresponding to the different RI into groups with a preset number according to the RI, wherein the preset number is more than or equal to 2;

determining codebook limiting modes corresponding to codebooks in the groups with the preset number, wherein a first codebook limiting mode is adopted in a first group with the preset number, a second codebook limiting mode is adopted in a second group with the preset number, and the first codebook limiting mode and the second codebook limiting mode are different;

and sending a codebook restriction signaling according to the determined codebook restriction mode.

2. The method of claim 1,

the first codebook restriction mode includes: code book limiting is carried out on code words in a code book corresponding to each RI in the first number of groups by adopting independent first signaling, wherein the first signaling is used for indicating limiting information of one or more code words in each RI in the first number of groups; and/or the presence of a gas in the gas,

the second codebook restriction method includes: and performing codebook restriction on the codebooks in the groups of the second number by using M second signaling, wherein a signaling bit in each second signaling simultaneously indicates restriction information of codewords in the codebooks corresponding to one or more RIs in the groups of the second number, and M is an integer greater than or equal to 1.

3. The method of claim 2, wherein codebook restriction using independent first signaling for the codebooks corresponding to each RI in the first number of groups comprises at least one of:

respectively adopting a first bitmap signaling to limit the code words in any codebook in each RI in the first number of groups;

and respectively limiting the values of more than two indexes corresponding to the code words in any codebook in each RI in the first quantity of groups by adopting a second bitmap signaling.

4. The method of claim 1, wherein the second codebook restriction mode further comprises at least one of:

and codebook restriction is performed on the codebooks in the second number of groups by using N third signaling, wherein each third signaling is used for indicating restriction information of all the codewords in the codebook corresponding to one RI in the second number of groups, and N is an integer greater than or equal to 1.

5. The method according to any one of claims 1 to 4,

the first number of groups comprises one or more groups consisting of codebooks corresponding to RIs whose RI values are greater than 2, and the second number of groups comprises one or more groups consisting of codebooks corresponding to RIs whose RI values are less than or equal to 2; or,

the first number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups includes one or more groups composed of codebooks corresponding to RIs whose RI values are less than or equal to 4.

6. The method of claim 5,

when the first number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are greater than 2, and the second number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are less than or equal to 2, one of the following is included:

the first number of groups includes groups of codebooks corresponding to RIs with RI values of 3 and 4, and the first number of groups includes groups of codebooks corresponding to RIs with RI values of 1 and 2;

the first number of groups includes groups of codebooks corresponding to RIs having RI values of 3,4,5,6,7, and 8, and the second number of groups includes groups of codebooks corresponding to RIs having RI values of 1 and 2;

the first number of groups includes a group of codebooks corresponding to RIs with RI values of 3 and 4 and a group of codebooks corresponding to RIs with RI values of 5,6,7 and 8, and the second number of groups includes a group of codebooks corresponding to RIs with RI values of 1 and 2;

when the first number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are greater than 4, and the second number of groups includes one or more groups of codebooks corresponding to RIs whose RI values are less than or equal to 4, the first number of groups includes groups of codebooks corresponding to RIs whose RI values are 5,6,7 and 8, and the second number of groups includes groups of codebooks corresponding to RIs whose RI values are 1,2,3 and 4.

7. The method of claim 1, comprising at least one of:

determining codebooks corresponding to different rank indication RI when channel information is fed back comprises: saving codebooks corresponding to different rank indication RI according to a mode appointed by the terminal, or generating the codebooks corresponding to the different rank indication RI according to codebook parameter configuration information of the base station and the mode appointed by the terminal;

dividing the codebooks corresponding to the different RIs into groups of a predetermined number according to the RI includes: dividing the codebooks corresponding to the different RI into the groups with the preset number according to the grouping mode appointed by the terminal and the RI;

determining a codebook restriction mode corresponding to the codebooks in the predetermined number of groups comprises: and determining a codebook limiting mode corresponding to the codebooks in the groups of the preset number according to a grouping mode appointed by the terminal.

8. A method for quantizing and feeding back channel information, comprising:

determining an available codebook subset according to the determined codebook limiting mode and a codebook limiting signaling received from a base station in advance;

and carrying out quantitative feedback on the channel information according to the determined available codebook subset.

9. The method of claim 8,

10. The method of claim 9, wherein codebook restriction using independent first signaling for the codebooks corresponding to each RI in the first number of groups comprises at least one of:

11. The method of claim 8, wherein the second codebook restriction mode further comprises at least one of:

12. The method according to any one of claims 8 to 11,

13. The method of claim 12,

14. The method of claim 8, comprising at least one of:

determining codebooks corresponding to different rank indication RI when channel information is fed back comprises: saving codebooks corresponding to different rank indication RI according to a mode appointed by a base station, or generating the codebooks corresponding to the different rank indication RI according to codebook parameter configuration information of the base station and the mode appointed by the base station;

dividing the codebooks corresponding to the different RIs into groups of a predetermined number according to the RI includes: dividing the codebooks corresponding to the different RIs into the groups with the preset number according to the grouping mode appointed by the base station and the RI;

determining a codebook restriction mode corresponding to the codebooks in the predetermined number of groups comprises: and determining a codebook limiting mode corresponding to the codebooks in the groups of the preset number according to a grouping mode appointed by the base station.

15. An apparatus for transmitting codebook restriction signaling, comprising:

the first determining module is used for determining codebooks corresponding to different rank indication RI during channel information feedback;

a first dividing module, configured to divide the codebooks corresponding to the different RIs into groups of a predetermined number according to the RI, where the predetermined number is greater than or equal to 2;

a second determining module, configured to determine codebook restriction manners corresponding to codebooks in the predetermined number of groups, where a first number of groups in the predetermined number of groups employ a first codebook restriction manner, a second number of groups in the predetermined number of groups employ a second codebook restriction manner, and the first codebook restriction manner and the second codebook restriction manner are different;

and the sending module is used for sending the codebook restriction signaling according to the determined codebook restriction mode.

16. The apparatus of claim 15,

17. The apparatus of claim 16, wherein codebook restriction using independent first signaling for the codebooks corresponding to each RI in the first number of groups comprises at least one of:

18. The apparatus of claim 15, wherein the second codebook restriction mode further comprises at least one of:

19. The apparatus of any one of claims 15 to 18,

20. The apparatus of claim 19,

21. The apparatus of claim 15, comprising at least one of:

the first determining module includes: the first determining unit is used for storing codebooks corresponding to different rank indication RI according to a mode appointed by the terminal, or generating the codebooks corresponding to the different rank indication RI according to codebook parameter configuration information of the base station and the mode appointed by the terminal;

the first division module includes: a first dividing unit, configured to divide the codebooks corresponding to the different RIs into the groups of the predetermined number according to the RI in a grouping manner agreed with a terminal;

the second determining module includes: and a second determining unit, configured to determine, according to a grouping manner agreed by the terminal, a codebook restriction manner corresponding to the codebook in the group of the predetermined number.

22. An apparatus for quantizing and feeding back channel information, comprising:

a third determining module, configured to determine codebooks corresponding to different rank indication RIs during channel information feedback;

a second dividing module, configured to divide the codebooks corresponding to the different RIs into groups of a predetermined number according to the RI, where the predetermined number is greater than or equal to 2;

a fourth determining module, configured to determine codebook restriction manners corresponding to codebooks in the predetermined number of groups, where a first number of groups in the predetermined number of groups employ a first codebook restriction manner, a second number of groups in the predetermined number of groups employ a second codebook restriction manner, and the first codebook restriction manner and the second codebook restriction manner are different;

a fifth determining module, configured to determine an available codebook subset according to the determined codebook restriction mode and a codebook restriction signaling received in advance from the base station;

and the feedback module is used for carrying out quantitative feedback on the channel information according to the determined available codebook subset.

23. The apparatus of claim 22,

24. The apparatus of claim 23, wherein codebook restriction using independent first signaling for the codebooks corresponding to each RI in the first number of groups comprises at least one of:

25. The apparatus of claim 22, wherein the second codebook restriction mode further comprises at least one of:

26. The apparatus of any one of claims 22 to 25,

27. The apparatus of claim 26,

28. The apparatus of claim 22, comprising at least one of:

the third determining module includes: a third determining unit, configured to store codebooks corresponding to different rank indication RIs according to a manner agreed with the base station, or generate codebooks corresponding to different rank indication RIs according to codebook parameter configuration information of the base station and the manner agreed with the base station;

the second dividing module includes: a second dividing unit, configured to divide the codebooks corresponding to the different RIs into the groups of the predetermined number according to the RI in a grouping manner agreed with the base station;

the fourth determining module includes: and a fourth determining unit, configured to determine, according to a grouping manner agreed by the base station, a codebook restriction manner corresponding to the codebooks in the predetermined number of groups.