WO2017101651A1

WO2017101651A1 - Method and device for determining instance of channel state information reporting

Info

Publication number: WO2017101651A1
Application number: PCT/CN2016/107105
Authority: WO
Inventors: 陈艺戬; 李儒岳; 吴昊; 鲁照华; 蔡剑兴; 肖华华
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-12-18
Filing date: 2016-11-24
Publication date: 2017-06-22
Also published as: CN106899378B; CN106899378A

Abstract

Provided in the present invention are a method and device for determining instance of channel state information reporting, the method comprising: receiving a configuration signal issued by a base station, and determining a measurement pilot frequency resource set R according to the configuration signal, the measurement pilot frequency resource set R comprising: K sets of pilot frequencies, K being a positive integer greater than 1, and the K sets of pilot frequencies at least comprising: a pilot frequency having one antenna port and a pilot frequency having more than one antenna ports; selecting the Sth set of pilot frequencies in the K sets of pilot frequencies, and feeding back the indication information of the Sth set of pilot frequencies and CSI information measured on the basis of the Sth set of pilot frequencies, S belonging to a set [1, K]; determining the N number of the reporting instances corresponding to the CSI information fed back on PUCCH according to the Ns number of antenna ports corresponding to the Sth set of pilot frequencies, N being determined by means of at least one of the following modes: mode I, when Ns is equal to 1, N is m; when Ns is greater than 1, N is m+1; mode II, when Ns is greater than or equal to 1, N is m which is a positive integer.

Description

Method and device for determining channel state information report instance

Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for determining a channel state information report instance.

Background technique

In a wireless communication system, a transmitting end and a receiving end use a plurality of antennas to obtain a higher rate in a spatial multiplexing manner. Compared with the general spatial multiplexing method, an enhanced technology is that the receiving end feeds back the channel information of the transmitting end, and the transmitting end uses the transmitting precoding technology according to the obtained channel information, which can greatly improve the transmission performance. For Single User Multi-input Multi-output (SU-MIMO), channel feature vector information is used for precoding directly; for multi-user multi-input multi-output (Multi-User Multi-input Multi) -output, abbreviated as MU-MIMO, requires relatively accurate channel information. The following describes some basic contents related to the acquisition of the channel state information (CSI, including the channel part and the interference part) and the terminal side CSI quantization feedback. Compared with time division duplex (Time Division Dual, for short, TDD system can measure the uplink channel by sending SRS and then reciprocally obtain the downlink channel matrix, Frequency Division Dual (FDD) system is not in the same frequency band because of uplink and downlink It is difficult to obtain accurate CSI information in this way. The FDD system currently has the following typical CSI feedback scenarios and corresponding feedback technologies; if considering the supported antenna dimensions are small, less than or equal to 8 antennas, channel measurement pilots and CSI The feedback overhead is generally considered to be acceptable. For the sake of simplicity, full-dimensional measurement and CSI feedback are used. For example, in the early LTE version, FDD mainly considered this scenario, using full-dimensional pilot and CSI feedback. The feedback method is Implicit feedback, first, the base station sends a set of channel measurement pilots to the terminal, and the terminal performs channel measurement and CSI quantization feedback based on the pilot. The measurement pilot resource can be configured with a 2-port channel measurement pilot resource index (channel state information Resource). Index, referred to as CSI-RS, often referred to as BI, beam index), 4-port CSI-RS, 8 Port CSI-RS; the terminal detects these pilots and estimates the channel matrix for channel information quantization; generally, the content of the quantized CSI mainly includes (RI/PMI/CQI): channel quality indication (referred to as channel quality indication, short for It is a CQI), a Precoding Matrix Indicator (PMI) and a Rank Indicator (RI). CQI is an indicator for measuring the quality of a downlink channel. CQI can be understood as a signal-to-noise ratio. (Signal to Interference plus Noise Ratio, SINR for short) is a kind of quantization. In the 36-213 protocol, CQI is represented by an integer value of 0-15, which represents different CQI levels, and different CQIs correspond to their respective modulation modes. And Modulation and Coding Scheme (MCS). The RI is used to describe the number of spatially independent channels, corresponding to the rank of the channel response matrix. In the spatial multiplexing mode, the UE needs to feed back RI information, but not in other modes. The RI information needs to be fed back. The rank of the channel matrix corresponds to the number of layers. The PMI feeds back the best precoding information, based on the index feedback, indicating the best match among the agreed codebooks. The codeword of the characteristics of the pre-channel.

CSI feedback mode: In order to feedback CQI/PMI/RI, LTE also defines multiple CSI feedback modes, which refer to CSI (CQI/PMI/RI) feedback information combinations, including sub-band feedback and wideband feedback or Selecting M subband feedbacks, etc. includes periodic feedback and aperiodic feedback. The aperiodic feedback is transmitted in the Physical Uplink Shared Channel (PUSCH) (as shown in Table 1 below), and includes the following modes:

Table I

The value of x in Mode xy in Table 1 is 1, 2, and 3 represent the feedback characteristics of three CQIs: wideband CQI, subband CQI selected by UE, subband CQI of high layer configuration; values of y include 0,1,2, where 0 represents no PMI, 1 represents 1 (wideband) PMI, and 2 represents multiple PMIs (wideband and one or more subbands);

The periodic feedback mode refers to a mode that is fed back periodically in the Physical Uplink Control Channel (PUCCH). As shown in Table 2 below, it includes the following modes:

Table II

The value of x in Mode xy is 1, and 2 represents the feedback characteristics of two CQIs: wideband CQI, sub-band CQI selected by UE; y takes 0, 1, where 0 means no PMI, 1 means include PMI; Mode 1-1 needs to consider the case of a single PMI codebook and the case of a dual PMI codebook, and is divided into multiple sub-modes; Mode 1-1 of the normal mode: the feedback content includes RI feedback, wideband (WB, wideband) PMI i feedback, wideband CQI feedback; divided into two reporting types; the first reporting type is RI, the second reporting type is broadband (WB, wideband) PMI i feedback and broadband CQI feedback; dual PMI Mode 1-1 submode 1: One codeword requires two PMIs, i1 and i2, together, i1 is broadband feedback long-term feedback, and i2 can be sub-band short-time feedback; this sub-mode contains 2 reports. Reporting type: RI/PMI i1 joint coding, and broadband PMI i2and broadband CQI.

Mode 1-1 sub-mode 2 in dual PMI: feedback content includes RI feedback, wideband (WB, wideband) PMI i1, broadband PMI i2 feedback, wideband CQI feedback; as shown in the following figure; divided into two reporting types; The first reporting type is RI, the second reporting type is broadband (WB, wideband) PMI i1/i2 joint coding feedback and wideband CQI feedback; here i1 and i2 both perform sampling processing of some codebook indexes to reduce overhead;

Mode 2-1 also needs to consider the case of a single PMI codebook and the case of a dual PMI codebook. In one case, it is not necessary to introduce a Precoder Type Indicator (PTI), and another case introduces a PTI. Indicating that the precoding type of the feedback can be flexibly switched in the time domain;

Normal mode Mode 2-1: The feedback includes RI feedback, wideband (WB, wideband) PMI, sub-width PMI feedback; divided into 3 reporting types; the first reporting type is RI, and the second reporting type is broadband. (WB, wideband) PMI feedback and wideband CQI feedback; the third reporting type is the subband CQI;

Mode 2-1 for dual PMI: feedback includes RI feedback, wideband (WB, wideband) PMI i1, broadband PMI i2 feedback, wideband CQI feedback; divided into 4 reporting types; the first reporting type is RI/ PTI, the second reporting type is broadband (WB, wideband) PMI i1, the third reporting type is broadband PMI i2 and wideband CQI feedback; the fourth reporting type is subband i2 and CQI feedback; here PTI is used Indicates the selection of the report type group that is reported later; PTI=0 and 1 respectively correspond to the two different reporting type groups reported by the RI/PTI to the next RI/PTI feedback reporting period;

With the development of technology, after the number of antennas increases and 3D MIMO applications are considered, more complex measurement and feedback techniques are adopted; for example, the base station transmits N sets of pilots to the terminal for channel state information measurement, and N>=2 terminal selects among them. A set of pilots, and reporting CRI (CSI-RS channel measurement pilot resource index, often referred to as BI) to the base station, the terminal reports RI/PMI/CQI based on the selected channel measurement pilot; this way can select the most The best CSI-RS resource is measured (which can be understood as part of the channel information feedback). Combined with the traditional CSI feedback, the base station can obtain the total channel information through CRI and traditional CSI feedback.

FIG. 1 is a schematic diagram of CSI feedback based on measurement pilot selection in the prior art. As shown in FIG. 1 , a typical application is a vertical sector virtualization technology. A base station uses different precoding to generate beams in different directions. Covering different vertical directions; the UE selects the best precoding pilot (vertical beam), and then performs horizontal dimension CSI feedback based on the precoding pilot. The base station obtains relatively complete channel state information based on the reporting of the precoding pilot (vertical beam) selection information of the terminal and the CSI feedback of the horizontal dimension, combined with the weight used by the precoding pilot.

2 is a schematic diagram of two types of port virtualization and beam transmission in the same antenna topology in the prior art. In FIG. 2, the base station configures K sets of pilots for the terminal, and the number of pilot ports per set is N _k for the terminal. Beam/pilot resource selection and CSI measurement feedback, a simple method is to limit N _k equal, but in fact, the value of N _k is equal. This limitation is too inflexible, and the base station cannot adopt multiple different port virtualization methods. For example, with an antenna topology as follows, it is difficult to support the choice between two virtualization modes in the existing way.

The left side of Figure 2 shows a 16Tx system (4 rows and 2 columns), and the virtualization matrix P1 is an 8-dimensional matrix. The set of pilot drop dimension ports is 4 dimensions, using two such matrices P1(a), and P1(b) to generate two sets of such pilots; for terminal measurement; the right side represents the same 4 rows and 2 columns In the 16Tx system, the virtualization matrix P2 is a 4-dimensional matrix. After virtualization, each set of pilot-down dimension ports is 8 dimensions, and four such matrices P2(a), P2(b), P2(c), and P2 are used. d) Generate 4 sets of such pilots; if the limit Nk must be equal, the gain of dynamic selection switching between the above two virtualization modes is lost.

There is also a technical solution in the prior art: the base station configures the K sets of pilots for the terminal, and the number of pilot ports per set is N _k . If the N _k is allowed to be different, the number of different antennas and the number of different antennas may occur. The feedback mode confusion occurs when the UE feeds back. The main reason is that the base station has only one set of reporting mode and reporting instance, and cannot fit N _k =1 and N _k >1 at the same time.

In the related art, when configuring pilot sets K = 1 and N _k> 1 is present in the number of antenna ports N _k, reported examples of the terminal can not meet the problem of the above two cases, no effective technical solutions.

Summary of the invention

In order to solve the above technical problem, an embodiment of the present invention provides a method and an apparatus for determining a channel state information report instance.

According to an embodiment of the present invention, a method for determining a channel state information report instance is provided, including: receiving configuration signaling sent by a base station, and determining a measurement pilot resource set R according to the configuration instruction, where The measurement pilot resource set R includes: K sets of pilots, K is greater than 1 and is a positive integer, and the K sets of pilots include at least: pilots having an antenna port number of 1 and pilots having a number of antenna ports greater than 1; The S set pilot of the K sets of pilots, and feeding back the indication information of the Sth set of pilots and the CSI information based on the S set of pilot measurements, where S belongs to the set [1, K]; The number of antenna ports Ns corresponding to the S set of pilots determines that the number N of the report instances corresponding to the CSI information fed back on the physical uplink control channel PUCCH is determined by at least one of the following manners: Mode 1: When Ns is equal to 1 When N is m, when Ns is greater than 1, N is m+1; and mode 2: when Ns is greater than or equal to 1, N is m, where m is a positive integer.

Preferably, when determining the N by manner 1, the first set is a subset of the second set, where the first set is a set of m report instances when Ns is equal to 1, and the second set is when Ns is greater than 1. A collection of m+1 report instances.

Preferably, when the N is determined by the mode 2, and the Ns is equal to 1, before the CSI information of the S set pilot measurement is fed back, the method further includes: agreeing with the base station to obtain the rank indicator RI in the CSI information. How to obtain the precoding matrix indicator PMI.

Preferably, the RI and the PMI are obtained by at least one of the following ways: the base station is agreed to report a fixed RI and/or PMI; the base station agrees that the RI index is equal to a Beam Index (BI Index) index, and/or agrees with the base station. The PMI index is equal to the BI index; the base station agrees that the RI index is equal to the channel quality indication information CQI index, and/or the base station agrees that the PMI index is equal to the CQI index.

Preferably, when the method is used to determine the N, the method further includes: if the Ns corresponding to the selected S set of pilots is equal to 1, the CQI information is fed back when the feedback position of the feedback RI is greater than 1 when the Ns is greater than 1. And/or feedback channel measurement pilot resource index CRI information at a feedback position of the feedback RI when Ns is greater than 1; and/or feedback of feedback RI when Ns is greater than 1. In the position, give up feedback.

According to another embodiment of the present invention, a method for quantifying channel state information is provided, including: a codebook C used for quantifying channel state information with a base station, wherein the codebook C includes: a plurality of subcodebooks a set C(r), the set C(r) comprising a rank r of a plurality of channel matrices, the rank r taking values from the set A=[1, Xr], and Xr being a positive integer;

Using the codebook C to quantize channel state information, when the rank r does not belong to the set Q, determining a feedback overhead of the PMI according to the size of the codebook C, and feeding back the feedback overhead to the base station; when the rank r belongs to When the Q is aggregated, the PMI of the pre-agreed overhead size O bit is fed back to the base station, where O is an integer greater than or equal to 1, and the set Q is a subset of A.

Preferably, the value of m includes: 1, 2.

In another embodiment of the present invention, a device for determining a channel state information report is provided, including: a receiving module, configured to receive configuration signaling sent by a base station, and determine a measurement pilot resource according to the configuration instruction. The set R, where the measurement pilot resource set R includes: K sets of pilots, K is greater than 1 and is a positive integer, and the K sets of pilots include at least: a set of pilots with a number of antenna ports of one and one a pilot with a number of antenna ports greater than 1; a selection module configured to select a Sth pilot in the K sets of pilots; a feedback module configured to feed back the indication information of the Sth pilot and based on the S The CSI information of the pilot measurement, the determining module is configured to determine, according to the number Ns of antenna ports corresponding to the S set of pilots, the number N of report instances corresponding to the CSI information fed back on the physical uplink control channel PUCCH, N is determined by at least one of the following methods: Mode 1: When Ns is equal to 1, N is m, and when Ns is greater than 1, N is m+1; Mode 2: When Ns is greater than or equal to 1, N is m, where m is positive Integer.

Preferably, the determining module is further configured to: when the method 1 determines the N, the first set is a subset of the second set, where the first set is a set of m report instances when Ns is equal to 1. The second set is a set of m+1 report instances when Ns is greater than one.

Preferably, the apparatus further includes: an appointment module, configured to acquire, by the base station, a rank indicator RI and a precoding matrix indication in the CSI information when determining the N by using mode 2, and the Ns is equal to 1. How to get PMI.

Preferably, the appointment module is configured to agree to report a fixed RI and/or PMI with the base station; further set to agree with the base station that the RI index is equal to the BI index, and/or the base station agrees that the PMI index is equal to the BI index; The base station agrees that the RI index is equal to the channel quality indication information CQI index, and/or the base station agrees that the PMI index is equal to the CQI index.

Preferably, the feedback module includes: a first feedback unit, configured to: when N is determined by adopting mode 2 and Ns corresponding to the selected S set pilot is equal to 1, feedback position of feedback RI when Ns is greater than 1. Up, feedback CQI information; the second feedback unit is configured to determine, when the mode 2 is used to determine the N, and the selected S-set pilot corresponding to Ns is equal to 1, when the Ns is greater than 1, the feedback RI feedback position, the feedback channel The pilot resource index CRI information is measured; the third feedback unit is configured to: when the N is determined by adopting mode 2 and the Ns corresponding to the selected S set of pilots is equal to 1, when the Ns is greater than 1, the feedback position of the feedback RI is Give up feedback.

In an embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction for performing the quantization method of the channel state information in the foregoing embodiment.

According to the embodiment of the present invention, the number of report instances is determined according to the number Ns of antenna ports corresponding to the selected S sets of pilots, so that the problem of reporting instance confusion does not occur, and the related art is solved. When there is a configuration in which the number of antenna ports N _k =1 and N _k >1, the reporting instance of the terminal cannot adapt to the problems of the above two cases, and provides two examples of solving reports when N _k =1 and N _k >1. The solution also avoids the situation that the feedback mode on the terminal side is confusing.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of CSI feedback based on measurement pilot selection in the prior art;

2 is a schematic diagram of two port virtualization and beam sending modes in the same antenna topology in the prior art;

3 is a flowchart of a method for determining an example of a channel state information report according to an embodiment of the present invention;

4 is a structural block diagram of a determining apparatus of a channel state information reporting example according to an embodiment of the present invention;

FIG. 5 is a block diagram showing another structure of a determining apparatus of a channel state information reporting example according to an embodiment of the present invention; FIG.

6 is a structural block diagram of a feedback module 44 of a determining apparatus of a channel state information reporting example according to an embodiment of the present invention;

6 is a flowchart of a method for quantifying channel state information according to an embodiment of the present invention;

7 is a flow chart of quantization of signaling channel state information according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of candidate patterns of CSI-RS resource locations according to a preferred embodiment 1 of the present invention.

detailed description

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

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is an embodiment of the invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

In the embodiment of the present invention, a method for determining a channel state information report instance is further provided. FIG. 3 is a flowchart of a method for determining a channel state information report instance according to an embodiment of the present invention. step:

Step S302: Receive configuration signaling sent by the base station, and determine a measurement pilot resource set R according to the configuration command. The measurement pilot resource set R includes: K sets of pilots, K is greater than 1 and is a positive integer, and the K sets of pilots include at least: a set of pilot ports having a number of antenna ports of 1 and a set of antenna ports greater than 1 pilot;

Step S304, selecting the Sth set of pilots in the K sets of pilots, and feeding back the indication information of the Sth set of pilots and the CSI information based on the Sth set of pilot measurements, where S belongs to the set [1, K] ;

Step S306: Determine, according to the number Ns of antenna ports corresponding to the S set of pilots, the number N of reports instances corresponding to the CSI information on the PUCCH, where N is determined by at least one of the following manners: Mode 1: When Ns is equal to 1, N is When m, Ns is greater than 1, N is m+1; and mode 2: when Ns is greater than or equal to 1, N is m, where m is a positive integer.

Through the foregoing steps, the terminal can determine the number of report instances according to the number Ns of antenna ports corresponding to the selected S sets of pilots, and thus the problem of reporting instance confusion does not occur on the terminal side, and the related art is solved. K sets of pilots When there are configurations of the number of antenna ports N _k =1 and N _k >1, the reporting instance of the terminal cannot adapt to the problems of the above two cases, and provides two kinds of cases when N _k =1 and N _k >1. Solve the solution of the report instance and avoid the confusion of the feedback mode on the terminal side.

The following technical solutions provided by the embodiments of the present invention can also solve the following problems in the prior art: when using the codebook to perform CSI feedback, the codebook corresponding to the partial RI includes multiple codewords, and the partial RI value The corresponding codebook contains one codeword, which means that some RI reports require PMI feedback and some RI reports do not require PMI feedback.

Corresponding to the above two ways of determining N, the embodiment of the present invention further provides the following technical solutions:

(1) When manner 1 is used to determine the above N, the first set is a subset of the second set, wherein the first set is a set of m report instances when Ns is equal to 1, and the second set is Ns greater than 1 m. A collection of +1 report instances.

(2) When the foregoing N is determined by the method 2, and the Ns is equal to 1, before the CSI information of the S set pilot measurement is fed back, the method further includes: agreeing with the foregoing base station to obtain the rank indicator RI and the precoding matrix in the CSI information. How to get the indicator PMI.

In an optional example, the RI and the PMI are obtained by at least one of the following methods: a fixed RI and/or PMI is reported to be agreed with the base station; and the base station agrees that the RI index is equal to the BI index (it is understood that the RI value is S), and / Or agreeing with the base station that the PMI index is equal to the BI index; agreeing with the base station that the RI index is equal to the channel quality indication information CQI index, and/or agreeing with the base station that the PMI index is equal to the CQI index.

When the foregoing N is determined by using the second method, the method further includes: if the Ns corresponding to the selected S sets of pilots is equal to 1, the CQI information is fed back at the feedback position of the feedback RI when the Ns is greater than 1; and/or at the Ns When the feedback RI is greater than 1, the feedback channel measures the pilot resource index CRI information; and/or the feedback position of the feedback RI when Ns is greater than 1, the feedback is discarded.

Optionally, the code base C and C used by the base station and the terminal for channel state information quantization include a plurality of sub-codebook sets C(r) corresponding to the rank r=1, 2...Xr values; Xr is an integer; In the codebook C, when the value of r belongs to the set Q, the number of codewords included in C(r) is one; and Q is a subset of the range of 1, 2, ... Xr of r. The terminal uses the codebook C to quantize the channel information. When the rank r does not belong to the set Q, the terminal determines the feedback overhead of the PMI according to the size of the codebook, and feeds back the feedback. To the base station. When the rank r belongs to the set Q, the terminal feeds back a PMI with a predetermined overhead size O bit to the base station, where O is an integer greater than or equal to 1.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In this embodiment, a device for determining a channel state information report is provided, which is used to implement the above-mentioned embodiments and preferred embodiments. The descriptions of the modules involved in the device are not described again. Description. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated. 4 is a structural block diagram of a determining apparatus of a channel state information reporting example according to an embodiment of the present invention. As shown in Figure 4, the device comprises:

The receiving module 40 is configured to receive configuration signaling sent by the base station, and determine a measurement pilot resource set R according to the configuration command, where the measurement pilot resource set R includes: K sets of pilots, where K is greater than 1 and is positive Integer, the above K sets of pilots include at least: a set of pilots with an antenna port number of 1 and a set of pilots with a number of antenna ports greater than one;

The selection module 42 is connected to the receiving module 40, and is configured to select the Sth set of pilots in the K sets of pilots;

The feedback module 44 is connected to the selection module 42 and configured to feed back the indication information of the S th set pilot and the CSI information based on the S set pilot measurement;

The determining module 46 is connected to the feedback module 44, and is configured to determine, according to the number Ns of antenna ports corresponding to the S set of pilots, the number N of report instances corresponding to the CSI information fed back on the physical uplink control channel PUCCH, at least by the following manner One determines the above N: mode one: when Ns is equal to 1, N is m, and when Ns is greater than 1, N is m+1; mode 2: when Ns is greater than or equal to 1, N is m, where m is a positive integer.

Through the combined action of the above modules, the terminal can determine the number of report instances according to the number Ns of antenna ports corresponding to the selected S sets of pilots, and thus the problem of reporting instance confusion does not occur on the terminal side, and the related technology is solved. In the case where the K sets of pilots are in the configuration in which the number of antenna ports N _k =1 and N _k >1, the reporting instance of the terminal cannot adapt to the problems of the above two cases, providing N _k =1 and N _k >1 The two solutions to solve the report instance also avoid the confusion of the feedback mode on the terminal side.

In the embodiment of the present invention, the determining module 46 is further configured to: when determining the N by using the mode 1, the first set is a subset of the second set, wherein the first set is m reporting instances when Ns is equal to 1. The set, the second set is a set of m+1 report instances when Ns is greater than one.

5 is another structural block diagram of a determining apparatus for a channel state information reporting example according to an embodiment of the present invention. As shown in FIG. 5, the foregoing apparatus further includes: an appointment module when determining the N by using mode 2, and Ns is equal to 1. 48. Connect with the feedback module 44, and set to obtain the acquisition manner of the rank indicator RI and the precoding matrix indicator PMI in the foregoing CSI information.

In an optional example, the appointment module 48 is configured to schedule a fixed RI and/or PMI with the base station; it is further configured to agree with the base station that the RI index is equal to the BI index, and/or the base station agrees that the PMI index is equal to the BI index; It is set to agree with the base station that the RI index is equal to the channel quality indication information CQI index, and/or the base station agrees that the PMI index is equal to the CQI index.

FIG. 6 is a structural block diagram of a feedback module 44 of a determining apparatus of a channel state information reporting example according to an embodiment of the present invention. The feedback module 44 is configured to: when the method 2 determines the N, the first feedback unit 440 is configured to When the Ns corresponding to the selected S sets of pilots is equal to 1, the CQI information is fed back at the feedback position of the feedback RI when Ns is greater than 1, and the second feedback unit 442 is set to the Nth of the selected S sets of pilots equal to 1 At the feedback position of the feedback RI when Ns is greater than 1, the feedback channel measures the pilot resource index CRI information; and the third feedback unit 444 sets the Ns corresponding to the selected S set of pilots to be equal to 1, when the Ns is greater than 1. When feedback RI feedback position, give up feedback.

For the above m value, it is preferred to select 1 and 2.

In the embodiment of the present invention, a method for quantifying channel state information is also provided. FIG. 7 is a flowchart of quantifying channel state information according to an embodiment of the present invention. As shown in FIG. 7, the method includes the following steps:

Step S702, the codebook C used for channel state information quantization is agreed with the base station, where the codebook C includes: a plurality of subcodebook sets C(r), the set C(r) includes a rank r of the plurality of channel matrices, and a rank r takes the value from the set A=[1,Xr], and Xr is a positive integer;

Step S704, using the codebook C to quantize the channel state information. When the rank r does not belong to the set Q, the feedback overhead of the PMI is determined according to the size of the codebook C, and the feedback overhead is fed back to the base station; when the rank r belongs to the set Q And feeding back the PMI of the pre-agreed overhead size O bit to the base station, where O is an integer greater than or equal to 1, and the set Q is a subset of A.

In order to better understand the above technical solutions, the above technical solutions are described below in conjunction with the preferred embodiments.

Preferred embodiment 1:

The base station configures K sets of channel measurement pilots (CSI-RSs) to the terminal; the base station sends the above-mentioned K sets of pilots in the resource locations indicated in the configuration information; the base station can configure one or more sets of pilots to the terminal, and the configuration information is The transmission may be through higher layer signaling; including periodic information of each set of pilots, sequence information, time-frequency resource location pattern in the subframe, subframe offset information, etc.; FIG. 8 is a CSI according to a preferred embodiment 1 of the present invention. - Schematic diagram of the candidate pattern of the RS resource location, as shown in FIG. 8, the same subframe supports up to five 8-port patterns #0, #1, #2, #3, #4, #5, if 4 ports are configured The pattern can be configured in 10, and the 2-port pattern can be configured in 20, wherein the DMRS (Demodulation Reference Signal) in FIG. 8 is a demodulation reference signal.

If different subframe offsets are considered, assuming that the configured period is 5 ms, then 5 seed frame offsets can be selected. On the basis of the original configurable pilots, the maximum value of K can be increased by 5 times. The configured period is 10ms and above, and the number of pilot sets K that can be configured will be more.

The base station sends K sets of CSI-RS pilots according to the configured period information, sequence information, time-frequency resource location pattern in the subframe, and subframe offset information; the terminal detects configuration signaling sent by the base station, and acquires pilot-related locations. The information and the sequence information can then detect the received pilot signal at the corresponding position; using the received pilot signal and the learned pilot transmission sequence information, channel estimation can be performed to obtain the channel matrix H.

In Figure 8, corresponding to Nk ports, k=1...K; Nk ranges from {1, 2, 4, 8}; the base station configures the CSI feedback mode for the terminal; if flexible configuration is implemented, there may be In the following configuration of some measurement pilot resources, at least one pilot with a port number of 1 and a pilot with a port number greater than 1 exist in multiple sets of pilots, as shown in Table 3 below:

Table 3

Preferred embodiment 2:

The terminal performs channel information measurement based on the estimated channel information of the plurality of pilots, and selects one set, the Sth set, the information of the feedback S, and the CSI information corresponding to the S set of pilots to the base station; if preferred, The configuration in Example 1; when the terminal performs channel information measurement, there may be a case where a pilot of Ns=1 or Ns>1 pilot is selected, and a set of feedback mode and a corresponding reporting instance (report instance) are present ( Including the case that the period and the offset cannot accommodate the feedback of Ns=1 and Ns>1 at the same time, therefore, one method is to determine the number of reporting instances according to the size of the Ns corresponding to the selected s-set CSI-RS ( As shown in Table 4 below, the time range used here is the time between the reporting of information of two k;

Table 4

Preferred Embodiment 3:

The terminal performs channel information measurement based on the estimated channel information of the plurality of pilots, and selects one set, the Sth set, the information of the feedback S, and the CSI information corresponding to the S set of pilots to the base station; if, as in the embodiment Configuration in 1; the terminal performs channel information measurement, and may select a pilot with Ns=1 or Ns>1 pilot, and a set of feedback mode and corresponding reporting instance positions (including period and offset) It is not possible to adapt the feedback of Ns=1 and Ns>1 at the same time. Therefore, one method is to determine the reporting instance according to the size of the Ns corresponding to the selected S-th set CSI-RS. The number (as shown in Table 5 and Table 6 below), the time range used here is the time between two S-information reports;

选择的导频的端口数目NsNumber of ports selected for the pilot Ns	reporting instance个数Number of reporting instances
11	22
>1>1	33

Table 5

Table 6

Preferred embodiment 4:

The terminal performs channel information measurement based on the estimated channel information of the plurality of pilots, and selects one set, the Sth set, the information of the feedback S, and the CSI information corresponding to the S set of pilots to the base station; if preferred, In the configuration in the first example, when Ns=1 and Ns>1, the feedback mode and the reporting instance are configured according to the requirement of Ns>1. At this time, the following situation occurs (as shown in Table 7 below). :

Table 7

At this point, it can be agreed that the RI/PMI can be the smallest RI/PMI index, or the RI/PMI can agree to the value equal to k; or the RI/PMI can be agreed to be equal to the value of the CQI, as shown in Table 8 and Table 9 below:

Table eight

Table 9

It can also be as shown in Table 10 and Table 11 below:

Table ten

Table XI

It can also be as shown in Table 12 and Table 13 below:

Table 12

Table thirteen

Preferred embodiment 5:

The terminal performs channel information measurement based on the estimated channel information of the plurality of pilots, and selects one set, the Sth set, the information of the feedback S, and the CSI information corresponding to the S set of pilots to the base station; if preferred, In the configuration in the first example, when Ns=1 and Ns>1, the feedback mode and the reporting instance are configured according to the requirement of Ns>1. At this time, the following situations occur (as shown in Table 14 below). ):

Table fourteen

At this time, it can also be as shown in Table 15 and Table 16 below:

Table fifteen

Table sixteen

Preferred Embodiment 6:

When a CSI process is configured with the Class B type feedback of the Long Term Evolution Advanced (LTE-A), the pilot set number is K=1, and the feedback is based on the PMI, the code corresponding to the partial RI may appear. The codeword included in the code contains a plurality of codewords, and the codebook corresponding to the partial RI value contains one codeword, as shown in Table 17 below.

Table seventeen

When the codeword corresponding to the RI value contains one codeword, you can choose not to perform PMI feedback, but there will be a problem that the number of reports is not equal.

When the terminal performs channel information quantization, if the selected Rank (ie, the number of layers υ) is one of 1, 2, 3, 4, since the codebook contains more than one codeword, it means that it needs to be determined according to the size of the codebook. Uplink feedback overhead and feedback resources, and use these resources to feed back their corresponding indexes. If the selected Rank (ie, the number of layers υ) is one of 5, 6, 7, 8, the uplink feedback overhead and the feedback resource may be determined according to one of the conditions of RI=1or2or 3or 4, and the fixed index value is fed back to Base station.

In summary, the embodiment of the present invention achieves the following technical effects: in the related art, when the K sets of pilots have a configuration in which the number of antenna ports N _k =1 and N _k >1, the reporting instance of the terminal cannot be adapted. The problem of the above two cases provides a solution to the two report cases when N _k =1 and N _k >1, and also avoids the situation that the feedback mode of the terminal side is confusing.

In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the objects so used are interchangeable, where appropriate, so that the embodiments of the invention described herein can be carried out in a sequence other than those illustrated or described herein. In addition, the terms "comprises" and "comprising" and any variants thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the 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 is to those skilled in the art. Many variations and modifications of the invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The technical solution of the embodiment of the present invention determines the number of report instances according to the number Ns of antenna ports corresponding to the selected S sets of pilots, so that the problem of reporting instance confusion does not occur, and the related art is solved. K sets of pilots When there are configurations of the number of antenna ports N _k =1 and N _k >1, the reporting instance of the terminal cannot adapt to the problems of the above two cases, and provides two kinds of cases when N _k =1 and N _k >1. Solve the solution of the report instance and avoid the confusion of the feedback mode on the terminal side.

Claims

A method for determining a channel state information report instance includes:

Receiving the configuration signaling sent by the base station, and determining the measurement pilot resource set R according to the configuration instruction, where the measurement pilot resource set R includes: K sets of pilots, where K is greater than 1 and is a positive integer, The K sets of pilots include at least: a pilot having a number of antenna ports of 1 and a pilot having a number of antenna ports greater than one;

Selecting the S sets of pilots in the K sets of pilots, and feeding back the indication information of the S sets of pilots and the CSI information based on the S sets of pilot measurements, where S belongs to the set [1, K];

Determining, according to the number of antenna ports Ns corresponding to the S set of pilots, the number N of report instances corresponding to the CSI information on the physical uplink control channel PUCCH, where the N is determined by at least one of the following manners: When Ns is equal to 1, N is m, and when Ns is greater than 1, N is m+1; and mode 2: when Ns is greater than or equal to 1, N is m, where m is a positive integer.
The method according to claim 1, wherein when the N is determined by mode 1, the first set is a subset of the second set, wherein the first set is a set of m report instances when Ns is equal to 1. The second set is a set of m+1 report instances when Ns is greater than one.
The method according to claim 1, wherein, when the N is determined by the mode 2, and the Ns is equal to 1, before the CSI information of the S set of pilot measurements is fed back, the method further includes:

Acquiring with the base station to acquire the rank indicator RI and the precoding matrix indicator PMI in the CSI information.
The method of claim 3, wherein the RI and the PMI are obtained at least by one of:

A fixed RI and/or PMI is reported to the base station;

Cooperating with the base station that the RI index is equal to the beam index BI index, and/or agreeing with the base station that the PMI index is equal to the BI index;

The RP index is agreed with the base station to be equal to the channel quality indication information CQI index, and/or the base station agrees that the PMI index is equal to the CQI index.
The method according to any one of claims 1 to 4, wherein when the method is used to determine the N, the method further comprises:

If the Ns corresponding to the selected S sets of pilots is equal to 1, the CQI information is fed back when the feedback position of the feedback RI is greater than 1 when Ns is greater than 1.

And/or feedback channel measurement pilot resource index CRI information on a feedback position of the feedback RI when Ns is greater than 1;

And/or feedback feedback is given to the feedback position of the feedback RI when Ns is greater than one.
The method according to any one of claims 1 to 4, wherein the value of m comprises: 1, 2.
A method for quantifying channel state information, comprising:

The codebook C used for the channel state information quantization with the base station, wherein the codebook C includes: a plurality of subcodebook sets C(r), the set C(r) including a rank r of a plurality of channel matrices, a rank r Take the value from the set A=[1,Xr], and Xr is a positive integer;

Using the codebook C to quantize channel state information, when the rank r does not belong to the set Q, determining a feedback overhead of the PMI according to the size of the codebook C, and feeding back the feedback overhead to the base station; when the rank r belongs to When the Q is aggregated, the PMI of the pre-agreed overhead size O bit is fed back to the base station, where O is an integer greater than or equal to 1, and the set Q is a subset of A.
A device for determining a channel state information report instance includes:

The receiving module is configured to receive configuration signaling sent by the base station, and determine, according to the configuration instruction, a measurement pilot resource set R, where the measurement pilot resource set R includes: K sets of pilots, where K is greater than 1 and is a positive integer, where the K sets of pilots include at least: a set of pilots having an antenna port number of 1 and a set of pilots having a number of antenna ports greater than 1;

Selecting a module, configured to select the Sth set of pilots in the K sets of pilots;

a feedback module, configured to feed back the indication information of the Sth set of pilots and the CSI information based on the Sth set of pilot measurements;

a determining module, configured to determine, according to the number Ns of antenna ports corresponding to the S set of pilots, a number N of report instances corresponding to the CSI information that is fed back on the physical uplink control channel PUCCH, where the N is determined by at least one of the following manners : Method 1: When Ns is equal to 1, N is m, and when Ns is greater than 1, N is m+1; Mode 2: When Ns is greater than or equal to 1, N is m, where m is a positive integer.
The apparatus according to claim 8, wherein the determining module is further configured to: when determining the N by using mode 1, the first set is a subset of the second set, wherein the first set is when Ns is equal to 1 The set of m report instances, the second set being a set of m+1 report instances when Ns is greater than one.
The apparatus according to claim 8, wherein said apparatus further comprises: when said mode N is determined by mode 2, and Ns is equal to 1;

And an appointment module, configured to obtain, by the base station, an acquisition manner of the rank indicator RI and the precoding matrix indicator PMI in the CSI information.
The apparatus according to claim 10, wherein the appointment module is configured to agree to report a fixed RI and/or PMI with the base station; further configured to agree with the base station that the RI index is equal to the beam index BI index, and/or agree with the base station The PMI index is equal to the BI index; it is further set to agree with the base station that the RI index is equal to the channel quality indication information CQI index, and/or the base station agrees that the PMI index is equal to the CQI index.
The device according to any one of claims 8 to 11, wherein the feedback module comprises:

a first feedback unit, configured to: when the N is determined by the mode 2, and the Ns corresponding to the selected S set of pilots is equal to 1, the CQI information is fed back when the feedback position of the feedback RI is greater than 1;

The second feedback unit is configured to: when the N is determined by the mode 2, and the Ns corresponding to the selected S set pilot is equal to 1, the feedback channel measurement pilot resource index CRI is used when the Ns is greater than 1 information;

The third feedback unit is configured to, when the N is determined by the mode 2, and the Ns corresponding to the selected S set of pilots is equal to 1, the feedback is discarded when the Ns is greater than 1.