CN102468935A - Channel state information feedback and acquisition methods and device thereof - Google Patents
Channel state information feedback and acquisition methods and device thereof Download PDFInfo
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- CN102468935A CN102468935A CN2010105365649A CN201010536564A CN102468935A CN 102468935 A CN102468935 A CN 102468935A CN 2010105365649 A CN2010105365649 A CN 2010105365649A CN 201010536564 A CN201010536564 A CN 201010536564A CN 102468935 A CN102468935 A CN 102468935A
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Abstract
The invention discloses a channel state information feedback and acquisition methods and a device thereof. The channel state information feedback method comprises the following steps: acquiring at least a control parameter; according to values of a plurality of continuous report type indication, determining a report type indicated value used in present CSI feedback, wherein, if the values of a plurality of the continuous report type indication are same, report type indication is set as a value which is different from the values of a plurality of the continuous report type indication, and quantity of the continuous report type indication is a value indicated by the control parameter; according to the determined report type indication, carrying out CSI reporting according to a set feedback mode. By employing the methods and the device of the invention, user equipment can be forced to change a precoding report type after continuous multiple report of a same kind of precoding report, and performance and stability of a system are raised.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of feedback and acquisition methods and equipment of channel condition information.
Background technology
Multiple-input and multiple-output (Multiple-Input Multiple-Output; MIMO) in the system; If transmitter can be known channel information with certain mode, just can be optimized sending signal, thereby improve the quality of reception and reduce requirement the receiver complexity according to the characteristic of channel.The general mode feedback channel information that adopts quantized channel information in real system to reduce feedback overhead, improves system transmissions efficient.
Adopt implicit expression CSI (ChannelState Information, channel condition information) feedback method in LTE-A (LTE-Advanced, the LTE evolution) system based on code book.UE (User Equipment; Subscriber equipment) based on the pilot measurement down channel; And according to himself the reception Processing Algorithm to the base station report the data fluxion that down link can support (Rank Indication, RI) and the label of pre-coding matrix (PrecodingMatrix Indicator, PMI); Simultaneously UE also need report each code word channel quality (ChannelQuality Indication, CQI).Wherein, in the computational process of CQI, UE hypothesis eNB (evolved NodeB, evolved base station) has used the RI/PMI of its recommendation.In order to improve the feedback accuracy of PMI, a pre-coding matrix (W) is formed by two matrixes (W1 and W2) merging in LTE-A, and W1 and W2 are respectively through two PMI (PMI; Be used to indicate W1; Be designated as PMI1 and the 2nd PMI, be used to indicate W2, be designated as PMI2) indication.Wherein, continue to use the code book in the LTE R8/9 version under 2 antenna ports and 4 antenna ports, W1 be defined as unit matrix, and PMI1 comprise 0 bit information need not the feedback.
In the LTE-A system; With PUCCH (the Physical Uplink Control Channel that introduces expansion; The ascending physical signal control channel) 2-1 feedback model; In order to realize the periodic feedback of broadband P MI, broadband CQI, perhaps realize the periodic feedback of subband PMI, subband CQI, perhaps realize the periodic feedback of broadband P MI, broadband CQI and subband PMI, subband CQI.The PUCCH 2-1 feedback model of expansion will be realized following function:
(1) pre-coding matrix W confirms based on the RI report that reports recently and the report content of 3 sub-frame;
The form of (2) 3 reports is respectively:
Report 1:RI and the indication of 1 bit report type (precoder type indication, PTI);
Report 2: if PTI=0 then reports W1 (that is, PMI1);
If PTI=1 then reports broadband CQI and broadband W2 (that is broadband P MI2);
Report 3: if PTI=0 then reports broadband CQI and broadband W2 (that is broadband P MI2);
If PTI=1 then reports subband CQI and subband W2 (that is subband PMI2);
(3) for 2 antenna ports and 4 antenna ports, PTI be configured to all the time 1 and need not the indication.
The content of PTI determines by UE, through indicating different PTI, UE can determine to report 2 with the content of report 3.Yet because the difference of UE ability, this complete mode by UE decision precoding Report Type exists following risk: UE to report broadband P MI and broadband CQI all the time or for a long time, and the base station can't obtain sub-band channel information all the time or for a long time; UE reports subband PMI and subband CQI information all the time or for a long time, and the base station can't obtain broad-band channel information all the time or for a long time.Above situation not only possibly influence systematic function, also can influence the stability of system.
To above problem, present existing scheme is: to parameter n of UE indication, UE whenever reports n PTI must PTI forced to put 0 once through high-level signaling.This scheme can guarantee to report at least in every n the PTI report cycle broadband P MI and broadband CQI, partly solves the unsteadiness that UE decision Report Type brings.
Invention finds that there is following defective at least in prior art in realizing process of the present invention:
On the one hand, the problem that above-mentioned existing scheme can only solve all the time or not have broadband P MI and broadband CQI to report for a long time, and can not solve the problem that does not have subband PMI and subband CQI to report all the time or for a long time; On the other hand, under the situation that UE reasonable distribution wide-band-message and sub-band information report, still retrain UE by force and report, thereby influence systematic function.
Summary of the invention
The object of the present invention is to provide a kind of feedback and acquisition methods and equipment of channel condition information; To force UE to report similar precoding report back to change the precoding Report Type in continuous several times; Thereby improve systematic function and stability, for this reason, the present invention adopts following technical scheme:
The feedback method of a kind of CSI comprises:
Obtain at least one Control Parameter;
According to the value of continuous several Report Types indications, confirm that this carries out Report Type indication of CSI feedback usefulness; Wherein, if the value that continuous several Report Types are indicated is identical, then the Report Type indication is set to and should indicates value different numerical by continuous several Report Types, and said several are the indicated numerical value of said Control Parameter;
According to the Report Type indication of determining, carry out CSI according to the pattern of setting and report.
Wherein, the value of Report Type indication is determined by UE, is used for indicating twice Report Type indication to report the CSI Report Type between the subframe to network side.
A kind of subscriber equipment comprises:
Acquisition module is used to obtain at least one Control Parameter;
Determination module is used for the value according to continuous several Report Types indications, confirms that this carries out Report Type indication of CSI feedback usefulness; Wherein, if the value that continuous several Report Types are indicated is identical, then the Report Type indication is set to and should indicates value different numerical by continuous several Report Types, and said several are the indicated numerical value of said Control Parameter;
Reporting module is used for carrying out CSI according to the feedback model of setting and reporting according to the Report Type indication of determining.
A kind of network equipment comprises:
Sending module is used for sending high-rise control signaling to subscriber equipment, carries at least one Control Parameter in the said high-rise control signaling;
Receiver module is used to receive the CSI that subscriber equipment reports according to the feedback method of above-mentioned CSI.
The above embodiment of the present invention reports similar precoding report back to change the precoding Report Type through force users equipment in continuous several times, thereby improves systematic function and stability.
Description of drawings
Fig. 1 is the CSI process of feedback sketch map that one embodiment of the present of invention provided;
Fig. 2 is for being applied to flow process shown in Figure 1 the implementation procedure schematic flow sheet of LTE-A system;
The Report Type sketch map of Fig. 3 for using in the flow process shown in Figure 2;
Fig. 4 is the CSI process of feedback sketch map that another embodiment of the present invention provided;
Fig. 5 is for being applied to flow process shown in Figure 4 the implementation procedure schematic flow sheet of LTE-A system;
The Report Type sketch map of Fig. 6 for using in the flow process shown in Figure 5;
The structural representation of the subscriber equipment that Fig. 7 provides for the embodiment of the invention;
The structural representation of the base station equipment that Fig. 8 provides for the embodiment of the invention.
Embodiment
To the problems referred to above that prior art exists, the embodiment of the invention is forced UE to report similar precoding report back to change the precoding Report Type in continuous several times, thereby is improved systematic function and stability through increasing the mode of Control Parameter.
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Referring to Fig. 1, be the CSI process of feedback sketch map that one embodiment of the present of invention provided, this flow process can may further comprise the steps:
Wherein, UE confirms that according to Control Parameter N1 the concrete realization of Report Type indication can be: if continuous N1 Report Type indication value is numerical value 1, then this numerical value that reports the Report Type of usefulness to indicate is changed to numerical value 2; Otherwise, can confirm the Report Type indication by UE according to existing mode.Wherein, preferred nearest 1 Report Type indication of N continuous is as confirming that this reports the employed Report Type indication of CSI.
Wherein, the value of Report Type indication is determined by UE, is used to indicate after this Report Type indication Report Type, report content, report cycle or report variation constantly in the subframe before the next time of Report Type indication this time.
The step 101 of above-mentioned flow process can be carried out when eNB need upgrade Control Parameter N1.If in a period of time, Control Parameter N1 need not to change, then UE when reporting CSI, can according to before the Control Parameter N1 execution in step 102～103 that extracts.
Need to prove, when Control Parameter N1 is constant (promptly invariable), can in UE and eNB, dispose Control Parameter N1 respectively, so just need not eNB and Control Parameter N1 has been notified to UE through high-level signaling through methods such as pre-configured or agreement agreements.
When flow process shown in Figure 1 was applied to the implementation process of PUCCH 2-1 in the LTE-A system, this flow process can be as shown in Figure 2, comprising:
Wherein, UE confirms that according to Control Parameter N1 the concrete realization of PTI can be: if continuous N1 PTI is 1, then report the PTI of usefulness to be changed to 0 this; Otherwise, can confirm that by UE PTI is changed to 1 with PTI and perhaps remains unchanged according to existing mode.Wherein, preferred nearest 1 PTI of N continuous is as confirming that this reports the employed PTI of CSI.
Wherein, if Report Type indication (PTI) value is 1, then 3 reports reporting subsequently of UE can comprise:
Report 1:RI and PTI=1;
Report 2: broadband CQI and broadband W2 (that is broadband P MI2);
Report 3: subband CQI and subband W2 (that is subband PMI2).
If the Report Type indicated value is 0, then 3 reports reporting of UE can comprise:
Report 1:RI and PTI=0;
Report 2: if PTI=0 then reports W1 (that is, PMI1);
Report 3: if PTI=0 then reports broadband CQI and broadband W2 (that is broadband P MI2).
4 types report appears in the above feedback model altogether, and as shown in Figure 3, be respectively:
Type A report: in order to support subband CQI and subband W2 feedback;
Type B report: in order to support broadband CQI and broadband W2 feedback;
Type C report: in order to support the W1 feedback;
Type D report: report in order to support RI and PTI.
Among Fig. 3, if PTI=0, then before PTI reports subframe next time, at corresponding subframe feedback report type A and the Report Type C of reporting; If PTI=1 is then before PTI reports subframe next time, at corresponding subframe feedback report type A and the Report Type B of reporting.The PTI value is different, and variation has also taken place the report cycle of various reports.
Can find out through above description, report similar precoding report back to change the precoding Report Type through force users equipment in continuous several times, thereby improved systematic function and stability.Compared with prior art, on the one hand, solved the problem that the PUCCH of LTE-A system pattern 2-1 maybe be all the time or do not had subband PMI and subband CQI to report for a long time; On the other hand, under the situation that UE reasonable distribution wide-band-message and sub-band information report, retrain UE no longer by force and report, thereby reduced influence systematic function.
Referring to Fig. 4, be the CSI process of feedback sketch map that another embodiment of the present invention provides, this flow process can may further comprise the steps:
Step 401, eNB sends high-rise control signaling to UE, carries Control Parameter N1 and N0 (N1, N0 can be positive integer) in this signaling, and UE extracts Control Parameter N1 and N0 from the high level control signaling that receives.
Step 402, UE confirms RI, and confirms the Report Type indication according to Control Parameter N1 and N0.
Wherein, UE confirms that according to Control Parameter N1 and N0 the concrete realization of Report Type indication can be:
If continuous N1 Report Type indication value is numerical value 1, then this numerical value that reports the Report Type of usefulness to indicate is changed to numerical value 2;
If continuous N0 Report Type indication value is numerical value 2, then this numerical value that reports the Report Type of usefulness to indicate is changed to numerical value 1;
Otherwise, can confirm Report Type indication value by UE according to existing mode.
Wherein, 1 Report Type indication of preferred nearest N continuous or nearest 0 Report Type indication of N continuous are as the foundation of confirming that this reports the employed Report Type indication of CSI.
Step 403, UE carries out CSI according to the respective feedback pattern and reports according to the Report Type indication of determining, and eNB receives the CSI that UE reports.
The step 401 of above-mentioned flow process can need be upgraded Control Parameter N1 or/and carry out during N0 at eNB.If in a period of time, Control Parameter N1 or/and N0 need not to change, then UE when reporting CSI, can according to before the Control Parameter N1 that extracts or/and execution in step 402～403.
Need to prove; When Control Parameter N1 and N0 are constant (promptly invariable); Can in UE and eNB, dispose Control Parameter N1 and N0 respectively through methods such as pre-configured or agreement agreements, so just need not eNB and Control Parameter N1 and N0 have been notified to UE through high-level signaling.
When flow process shown in Figure 4 was applied to the implementation process of PUCCH 2-1 in the LTE-A system, its flow process can be as shown in Figure 5, comprising:
If continuous N1 PTI is 1, then report the PTI of usefulness to be changed to 0 this;
If continuous N0 PTI is 0, then report the PTI of usefulness to be changed to 1 this;
Otherwise, can confirm that by UE PTI keeps PTI constant according to existing mode.
Wherein, preferred nearest 1 PTI of N continuous or nearest 0 PTI of N continuous are as confirming that this reports the foundation of the employed PTI of CSI.
Wherein, if Report Type indication (PTI) value is 1, then 3 reports reporting subsequently of UE can comprise:
Report 1:RI and PTI=1;
Report 2: broadband CQI and broadband W2 (that is broadband P MI2);
Report 3: subband CQI and subband W2 (that is subband PMI2).
If the Report Type indicated value is 0, then 3 reports reporting of UE can comprise:
Report 1:RI and PTI=0;
Report 2: if PTI=0 then reports W1 (that is, PMI1);
Report 3: if PTI=0 then reports broadband CQI and broadband W2 (that is broadband P MI2).
4 types report appears in the above feedback model altogether, and as shown in Figure 6, be respectively:
Type A report: in order to support subband CQI and subband W2 feedback;
Type B report: in order to support broadband CQI and broadband W2 feedback;
Type C report: in order to support the W1 feedback;
Type D report: report in order to support RI and PTI.
Among Fig. 6, if PTI=0, then before PTI reports subframe next time, at corresponding subframe feedback report type A and the Report Type C of reporting; If PTI=1 is then before PTI reports subframe next time, at corresponding subframe feedback report type A and the Report Type B of reporting.The PTI value is different, and variation has also taken place the report cycle of various reports.
Can find out through above description, report similar precoding report back to change the precoding Report Type through force users equipment in continuous several times, thereby improved systematic function and stability.Compared with prior art, on the one hand, solved the problem that the PUCCH of LTE-A system pattern 2-1 maybe be all the time or do not had subband PMI and subband CQI to report for a long time; On the other hand, under the situation that UE reasonable distribution wide-band-message and sub-band information report, retrain UE no longer by force and report, thereby reduced influence systematic function.
Need to prove, in the flow process that above embodiment describes, be that Report Type with 1 bit is designated as example and describes.If the number of bits of Report Type indication is more than 1 bit, still applicable above-mentioned flow process, as long as when the value of several Report Types indications continuously is identical, the value that changes the Report Type indication gets final product.
Need to prove that the described flow process of last embodiment not only is used in the LTE-A system, be applicable to that also other need UE to report the system of Report Type indication.
Referring to Fig. 7, the structural representation of the subscriber equipment that provides for the embodiment of the invention, this subscriber equipment is applicable to above-mentioned flow process, and this subscriber equipment can comprise:
In the above-mentioned subscriber equipment, determination module 702 can specifically be used for: if the value of continuous several Report Types indications is identical, then this Report Type indication of carrying out CSI feedback usefulness is set to and is somebody's turn to do continuously several Report Types indication value different numerical.
Concrete, when Control Parameter comprised first Control Parameter, determination module 702 can specifically be used for: if continuous recently several Report Types indications are 1, then this Report Type indication of carrying out CSI feedback usefulness is set to 0; Wherein, said several are the indicated numerical value of said first Control Parameter;
When Control Parameter comprised first Control Parameter and second Control Parameter, determination module 702 can specifically be used for: if continuous recently several Report Types indications are 1, then this Report Type indication of carrying out CSI feedback usefulness is set to 0; Wherein, said several are the indicated numerical value of said first Control Parameter; If several Report Type indications are 0 continuously recently, then this Report Type indication of carrying out CSI feedback usefulness is set to 1; Wherein, said several are the indicated numerical value of said second Control Parameter.
In the above-mentioned subscriber equipment, acquisition module 701 can specifically be used for: receive the high-level signaling that network side sends, from said signaling, extract at least one Control Parameter; Perhaps, according to confirming said at least one Control Parameter with the Control Parameter of the prior agreement of network side.
Subscriber equipment shown in Figure 7 can be applicable to the implementation process of PUCCH 2-1 in the LTE-A system, and the concrete realization of the corresponding function module can be repeated no more at this with reference to Fig. 2 or Fig. 4.
Referring to Fig. 8, the structural representation of the network equipment that provides for the embodiment of the invention, this network equipment can be applicable to above-mentioned flow process, and this network equipment can be base station (eNB) equipment.This network equipment can comprise:
Sending module 801 is used for sending high-rise control signaling to subscriber equipment, carries at least one Control Parameter in the said high-rise control signaling;
The network equipment shown in Figure 8 can be applicable to the implementation process of PUCCH 2-1 in the LTE-A system, and the concrete realization of the corresponding function module can be repeated no more at this with reference to Fig. 2 or Fig. 4.
Can find out through above description; The embodiment of the invention is with respect to prior art, on the one hand, can avoid that UE reports subband PMI and subband CQI information all the time or for a long time under the PUCCH of the LTE-A system pattern 2-1; ENB can't obtain broad-band channel information all the time or for a long time; Can avoid also that UE reports broadband P MI and broadband CQI all the time or for a long time under the PUCCH of the LTE-A system pattern 2-1, the base station can't obtain sub-band channel information all the time or for a long time, thereby improves the stability of system; On the other hand, the Report Type indication situation that reports several times based on the front and whether determine forcibly changing Report Type instruction content, UE carries out rational wide-band-message and sub-band information reports distribution thereby avoid interference, and has improved system effectiveness.
Need to prove that the described equipment of last embodiment not only is used in the LTE-A system, be applicable to that also other need UE to report the system of Report Type indication.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium, comprise some instructions with so that a station terminal equipment (can be mobile phone, personal computer; Server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.
Claims (11)
1. the feedback method of a channel condition information CSI is characterized in that, comprising:
Obtain at least one Control Parameter;
According to the value of continuous several Report Types indications, confirm that this carries out Report Type indication of CSI feedback usefulness; Wherein, if the value that continuous several Report Types are indicated is identical, then the Report Type indication is set to and should indicates value different numerical by continuous several Report Types, and said several are the indicated numerical value of said Control Parameter;
According to the Report Type indication of determining, carry out CSI according to the feedback model of setting and report.
2. feedback method as claimed in claim 1 is characterized in that said Control Parameter comprises first Control Parameter; If the value that continuous several Report Types are indicated is identical, then the Report Type indication is set to and should indicates value different numerical by continuous several Report Types, comprising:
If several Report Type indications are 1 continuously recently, then this Report Type indication of carrying out CSI feedback usefulness is set to 0; Wherein, said several are the indicated numerical value of said first Control Parameter.
3. feedback method as claimed in claim 2 is characterized in that said Control Parameter also comprises second Control Parameter; If the value that continuous several Report Types are indicated is identical, then the Report Type indication is set to and should indicates value different numerical by continuous several Report Types, also comprises:
If several Report Type indications are 0 continuously recently, then this Report Type indication of carrying out CSI feedback usefulness is set to 1; Wherein, said several are the indicated numerical value of said second Control Parameter.
4. the method for claim 1 is characterized in that, said at least one Control Parameter of obtaining comprises:
Receive the high-level signaling that network side sends, from said signaling, extract at least one Control Parameter; Perhaps,
According to confirming said at least one Control Parameter with the Control Parameter of the prior agreement of network side.
5. like each described method of claim 1 to 4; It is characterized in that; The indication of said Report Type is used to indicate after this Report Type indication, Report Type, report content, report cycle or report variation constantly in the subframe before the next time of Report Type indication this time.
6. a subscriber equipment is characterized in that, comprising:
Acquisition module is used to obtain at least one Control Parameter;
Determination module is used for the value according to continuous several Report Types indications, confirms that this carries out Report Type indication of CSI feedback usefulness; Wherein, if the value that continuous several Report Types are indicated is identical, then the Report Type indication is set to and should indicates value different numerical by continuous several Report Types, and said several are the indicated numerical value of said Control Parameter;
Reporting module is used for carrying out CSI according to the feedback model of setting and reporting according to the Report Type indication of determining.
7. subscriber equipment as claimed in claim 6 is characterized in that said Control Parameter comprises first Control Parameter;
Said determination module specifically is used for, if continuous recently several Report Types indications are 1, then this Report Type indication of carrying out CSI feedback usefulness is set to 0; Wherein, said several are the indicated numerical value of said first Control Parameter.
8. subscriber equipment as claimed in claim 6 is characterized in that said Control Parameter also comprises second Control Parameter;
Said determination module also is used for, if continuous recently several Report Types indications are 0, then this Report Type indication of carrying out CSI feedback usefulness is set to 1; Wherein, said several are the indicated numerical value of said second Control Parameter.
9. subscriber equipment as claimed in claim 6 is characterized in that said acquisition module specifically is used for, and receives the high-level signaling that network side sends, and from said signaling, extracts at least one Control Parameter; Perhaps, according to confirming said at least one Control Parameter with the Control Parameter of the prior agreement of network side.
10. a CSI acquisition methods is characterized in that, comprising:
Send high-rise control signaling to subscriber equipment, carry at least one Control Parameter in the said high-rise control signaling;
Receive the CSI that subscriber equipment reports according to each described method of claim 1 to 5.
11. a network equipment is characterized in that, comprising:
Sending module is used for sending high-rise control signaling to subscriber equipment, carries at least one Control Parameter in the said high-rise control signaling;
Receiver module is used to receive the CSI that subscriber equipment reports according to each described method of claim 1 to 5.
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| WO2016145918A1 (en) * | 2015-03-13 | 2016-09-22 | 电信科学技术研究院 | Method and apparatus for value determination of precoding type indication |
| WO2022166446A1 (en) * | 2021-02-03 | 2022-08-11 | 展讯通信（上海）有限公司 | Csi feedback method and apparatus, storage medium, terminal, and network device |
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| WO2016145918A1 (en) * | 2015-03-13 | 2016-09-22 | 电信科学技术研究院 | Method and apparatus for value determination of precoding type indication |
| CN106034008A (en) * | 2015-03-13 | 2016-10-19 | 电信科学技术研究院 | Value determination method and value determination device for precoding type indicator |
| CN106034008B (en) * | 2015-03-13 | 2020-06-19 | 电信科学技术研究院 | Method and device for determining value of precoding type indicator |
| WO2022166446A1 (en) * | 2021-02-03 | 2022-08-11 | 展讯通信（上海）有限公司 | Csi feedback method and apparatus, storage medium, terminal, and network device |
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