CN102271028A - Method and device for feeding back channel state information - Google Patents
Method and device for feeding back channel state information Download PDFInfo
- Publication number
- CN102271028A CN102271028A CN2011102212468A CN201110221246A CN102271028A CN 102271028 A CN102271028 A CN 102271028A CN 2011102212468 A CN2011102212468 A CN 2011102212468A CN 201110221246 A CN201110221246 A CN 201110221246A CN 102271028 A CN102271028 A CN 102271028A
- Authority
- CN
- China
- Prior art keywords
- cqi
- broadband
- system bandwidth
- subband
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and device for feeding back channel state information. The method comprises: a terminal determines the channel state information including N pieces of PMI (precoding matrix indicator) information on system bandwidths by using a pilot signal, and the terminal feeds back the channel state information, wherein the system bandwidths are S subband sets configured by a high level, and N is an integer more than 1 but smaller than S. Through the invention, the performance of the communication system is improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of channel state information feedback method and device.
Background technology
In the wireless communication system, transmitting terminal and receiving terminal take the mode of spatial reuse to use many antennas to obtain higher speed.With respect to general method for spacial multiplex, a kind of technique for enhancing is that receiving terminal feeds back to the transmitting terminal channel information, and transmitting terminal uses the emission precoding technique according to the channel information that obtains, and can greatly improve transmission performance.For single user's multiple-input and multiple-output (Single User Multi-Input Multi-Output abbreviates SU-MIMO as), directly use the channel characteristics Vector Message to carry out precoding; For multiuser MIMO (Multiple User Multi-Input Multi-Output abbreviates MU-MIMO as), needing more accurately, channel information instructs multi-user pre-coding.
At Long Term Evolution (Long Term Evolution, abbreviate LTE as) standard in, the minimum feedback unit of channel information is subband (Subband), a subband is by several Resource Block (Resource Block, abbreviate RB as) form, each RB is made up of a plurality of Resource Units (Resource Element abbreviates RE as); RE is the least unit of running time-frequency resource among the LTE.The object of correspondence can be subband (Multi-Subband) during the UE feedback channel information, or a plurality of subband, and broadband (Wideband).Being defined in third generation partner program (3rd Generation Partnership Project the abbreviates 3GPP as) agreement 36.213 of concrete granularity of RB, subband (Subband) and broadband (Wideband) has clear and definite regulation.
Have multiple transmission mode and feedback model in the LTE system, several main transmission modes are as follows:
Pattern 1: single antenna port: port 0 (Single-antenna port:port 0).
Pattern 2: transmit diversity (Transmit diversity).
Mode 3: Open-Loop Spatial Multiplexing (Open-loop spatial multiplexing).
Pattern 4: Closed-Loop Spatial Multiplexing (Closed-loop spatial multiplexing).
Pattern 5: multi-user's multiple-input and multiple-output (Multi-user MIMO).
Pattern 6: closed loop Rank=1 precoding (Closed-loop Rank=1precoding).
Mode 7: single current beamforming: port 5 (Single-antenna port:port 5).
Different feedback models and feedback content are arranged under the different transmission modes, in the LTE system, feedback model under the transmission mode of Closed-Loop Spatial Multiplexing and feedback method.Feedback method under other transmission mode and content are generally the simplification of the transmission mode of Closed-Loop Spatial Multiplexing.
During spatial reuse, the feedback content of uplink channel information mainly contains three kinds:
(1) pre-coding matrix indication (Precoding Matrix Indicator abbreviates PMI as), the characteristic feature Vector Message is recommended the base station, is used for the downlink precoding technology.
Wherein, in advanced long-term evolution system (Long-Term Evolution Advance the abbreviates LTE-A as) system of eight antennas, PMI comprises the first kind precoding designator i1 and the second class precoding designator i2.I1 and i2 are two index values, and by code word of the common indication of these two index, the code word of indication is used to characterize the channel characteristics Vector Message; In the LTE-A of four antennas system, PMI comprises single PMI, and this list PMI is the index of certain code word in the code book, and the code word of indication is used to characterize the channel characteristics Vector Message.
(2) order indication (Rank Indication abbreviates RI as) information, the order of sign channel, the base station is as the number of plies of descending support.The maximum RI=4 that supports during LTE.
(3) channel quality indication (Channel Quality Indicator, abbreviate CQI as) information, characterize quality of channel information, characterize channel quality with the modulation coding mode of recommending, the modulation coding mode of high-order represents that performance is good more more, supports 16 kinds of CQI grades to select among the LTE altogether.
Above-mentioned channel information PMI/RI/CQI is divided into following two kinds in up feedback kind: periodic feedback, the feedback or the aperiodic that mainly are carried on the ascending control channel PUCCH feed back, and are carried on the feedback on the Uplink Shared Channel PUSCH.
Periodic feedback is that system must dispose, and aperiodic, feedback was the feedback of irregular flip-over type, and feedback aperiodic on PUSCH is the higher feedback of a kind of precision, belongs to auxiliary, is used to improve the feedback of precision.
The aperiodic feedback model table of table 1
Wherein, among the pattern x-y, x represents the feedback of CQI in the table 3, and 1 is the feedback of broadband CQI, and 2 are subband CQI feedback, and 3 is the CQI feedback of high-rise configuration.
Y represents the PMI feedback, and 0 is no PMI, and 1 is single PMI, and 2 is a plurality of PMI.
Closed-Loop Spatial Multiplexing is always supported the feedback of PMI, so the feedback model on the PUSCH of its support is: Modes1-2,2-2,3-1.
Modes 1-2:, all feed back 1 PMI at each Subband; At whole bandwidth feedback CQI.
Modes 2-2: feed back a broadband CQI and a broadband P MI; The positional information of M better subband of feedback; The associating CQI of M subband; The associating PMI of M subband.
Modes 3-1: in the bandwidth range S subband of high-rise configuration; Feed back the associating CQI and the associating PMI of an above-mentioned bandwidth range S subband; Feed back the independent CQI of each subband.
In the feedback of reality, RI also with the subframe internal feedback of above-mentioned CQI information and PMI information at same PUSCH.RI is restricted to the interior numerical value of scope of 1～N, and N=min (Nt, Nr) Nt represents number of transmit antennas, Nr represents the reception antenna number.
The feedback of CQI mainly is divided into subband CQI and broadband CQI on implication, just the associating CQI of a plurality of subbands.Its implication is respectively that CQI grade and a plurality of subbands of the descending use of hypothesis that subband transmission of the descending use of hypothesis can be supported transmit the CQI grade that can support jointly.
CQI at same resource units can be 1 or 2 in addition.Main relevant with RI, during RI=1 1 CQI, RI was 2 CQI greater than 1 o'clock.Be 4bit during 1 CQI, when feeding back 2 CQI, the 2nd CQI uses differential technique, based on the 1st CQI difference, is 3bit.Be 11bit to the maximum, this also is the maximum supported expense that PUCCH goes up CSI information when feeding back.
CQI is for weighing an index of down channel quality quality.CQI represents with 0～15 integer value in 3GPP 36-213 agreement, has represented different CQI grades respectively, and different CQI correspondences modulation system and encoder bit rate (MCS) separately.
RI is used to describe the number of space independent channel, the order of respective channels response matrix.Under Open-Loop Spatial Multiplexing and Closed-Loop Spatial Multiplexing pattern, need UE feedback RI information, do not need to feed back RI information under other patterns.
PMI refers to the call number of the precoding codebook of UE feedback.Under these 3 kinds of patterns of closed loop of Closed-Loop Spatial Multiplexing, MU-MIMO, RI=1, need feedback PMI information, do not feed back PMI information under other emission modes.
Specifically, the CQI definition that occurs among the LTE is various, according to different principles, CQI can be divided:
Be divided into broadband CQI (wideband CQI) and subband CQI (subband CQI) according to measuring bandwidth.
Wideband CQI refers to the channel status indication to all subband, and what obtain is the CQI information of subband S set;
Subband CQI pointer is to the CQI information of each subband.LTE is according to different system bandwidths, and the RB of effective bandwidth correspondence has been divided into several RB groups, and each RB group is referred to as subband (subband).
Subband CQI can be divided into full subband CQI and Best M CQI again: full subband CQI reports the CQI information of all subbands; Best M CQI selects M subband from sets of subbands S, report the CQI information of this M subband, and reports the positional information of M subband simultaneously.
Be divided into single current CQI and double-current CQI according to the code stream number.
Single current CQI: be applied to single-antenna transmission port 0, the Closed-Loop Spatial Multiplexing of port 5, transmit diversity, MU-MIMO, RI=1, this moment, UE reported the CQI information of single code stream; Double fluid CQI: be applied to the Closed-Loop Spatial Multiplexing pattern.For the Open-Loop Spatial Multiplexing pattern, because channel condition information the unknown, and in precoding, double-current channel information has been carried out equilibrium treatment, so under the Open-Loop Spatial Multiplexing, the CQI of 2 code streams equates.
Be divided into absolute value CQI and differential CQI (Differential CQI) according to the CQI method for expressing.
The CQI index that absolute value CQI promptly represents with 4bit (CQI index); The CQI index that differential CQI (Differential CQI) is represented with 2bit or 3bit; Differential CQI be divided into again the 2nd code stream with respect to the differential CQI of the 1st code stream, subband CQI with respect to the differential CQI of subband CQI and suband CQI differential CQI with respect to broadband CQI.
Report mode to be divided into wideband CQI, UE selected (subband CQI), high-rise configuration (High layer configured) (subband CQI) according to CQI.Wherein, wideband CQI refers to the CQI information of subband S set; UE selected (subband CQI) is Best M CQI, feeds back the CQI information of a selected M subband, reports the position of M subband simultaneously; High layer configured (subband CQI) is full subband CQI, at CQI information of each subband feedback.
High layer configured and UE selected all are feedback systems of subband CQI, under the aperiodic feedback model, and not of uniform size the causing of subband of these two kinds of feedback systems definition; Under UE selected pattern, also defined the size of M.In the LTE system, CQI/PMI, the feedback of RI can be periodic feedback, also can be acyclic feedback, concrete feedback is as shown in table 2:
Table 2 periodic feedback and the corresponding uplink physical channel of aperiodicity feedback
| Scheduling method | Periodicity CQI reporting channel | Aperiodicity CQI reporting channel |
| Frequency is non-selective | PUCCH | |
| Frequency selectivity | PUCCH | PUSCH |
In the LTE-A system, adopted eight antenna technologies, also adopted the code book enhancement techniques accordingly, its core is, utilizing two precoding matrix indicators information, is the first precoding designator index i1 and the second precoding designator index i2 also, represents a pre-coding matrix jointly.Briefly, relatively the feedback of LTE increases the expense of PMI feedback, and utilizes the feedback of two PMI information to represent the state information of channel jointly.
Therefore, in LTE-A, support under the transmission mode of SU/MU that needing may need channel transmitted information that RI is arranged in broadband/many sub-band channel information of feedback, PMI and CQI, wherein PMI information may comprise i1 and i2.
Multi-antenna technology has been widely used in the LTE-A system at present, and many antenna calibrations of thing followed problem has also caused widely to be paid close attention to.The antenna calibration problem is meant, in multiaerial system, exists the regular hour to postpone and phase error between each antenna.
The variation of the channel condition that the error between the antenna is brought will have a strong impact on the selection of PMI, and the PMI ratio of precision of feeding back in the correlation technique is lower, thereby causes the performance of the inaccurate reduction of the result whole communication system of antenna calibration.
Summary of the invention
Main purpose of the present invention is to provide a kind of channel state information feedback method and device, causes the result of antenna calibration inaccurate to solve above-mentioned at least because the ratio of precision of feeding back channel state information is low, thus the problem that causes systematic function to descend.
According to an aspect of the present invention, provide a kind of channel state information feedback method, having comprised: terminal uses pilot signal to determine to include the channel condition information of N associating PMI on the system bandwidth; Terminal is feeding back channel state information on PUSCH or PUCCH.Wherein, system bandwidth (Wideband) is closed for the S subband set of high-rise configuration, and N is greater than 1 and less than the integer of S.
Preferably, in eight antenna systems, PMI information comprises the first precoding designator index i1 and the second precoding designator index i2, and in four antenna systems, PMI information is single PMI.
Preferably, the terminal feeding back channel state information comprises: terminal is according to one of following feedback model feeding back channel state information:
Unite PMI and broadband order indicator information RI for CQI, the N on the system bandwidth of each subband on feedback broadband CQI, broadband P MI, the system bandwidth;
The CQI of each subband on feedback broadband CQI, broadband i1, broadband i2, the system bandwidth unites i2 and broadband RI for the N on the system bandwidth;
I2 and broadband RI are united in i1, N of CQI, the N on the system bandwidth the associating of each subband on feedback broadband CQI, broadband i1, broadband i2, the system bandwidth.
Preferably, broadband CQI comprises one of following and combination: absolute broadband CQI, differential broadband CQI.
Preferably, each the subband CQI on the system bandwidth comprises one of following and combination: absolute subband CQI, difference subband CQI.
Preferably, the value of N for fixing greater than 1 and less than the integer value of S, or transformable greater than 1 and less than the integer value of S.
Preferably, channel condition information comprises CQI (CQI) information, order designator (RI) information and precoding designator (PMI) information.
According to a further aspect in the invention, provide a kind of channel condition information feedback device, having comprised: determination module is used to use pilot signal to determine to include the channel condition information of N associating PMI information on the system bandwidth; First feedback module is used for feeding back channel state information on PUSCH or PUCCH; Wherein, system bandwidth (Wideband) is closed for the S subband set of high-rise configuration, and N is greater than 1 and less than the integer of S.
Preferably, feedback module is used for according to one of following feedback model feeding back channel state information:
In four antenna systems, unite PMI and broadband order indicator information RI for CQI, the N on the system bandwidth of each subband on feedback broadband CQI, broadband P MI, the system bandwidth;
In eight antenna systems, the CQI of each subband on feedback broadband CQI, broadband i1, broadband i2, the system bandwidth unites i2 and broadband RI for the N on the system bandwidth;
In eight antenna systems, i2 and broadband RI are united in i1, N of CQI, the N on the system bandwidth the associating of each subband on feedback broadband CQI, broadband i1, broadband i2, the system bandwidth;
CQI, the N on the system bandwidth of each subband N associating RI that unites on i2, broadband RI and the system bandwidth that unites on i1, the system bandwidth on feedback broadband CQI, broadband i1 and broadband i2, the system bandwidth.
Preferably, the value of N for fixing greater than 1 and less than the integer value of S, or transformable greater than 1 and less than the integer value of S.
Preferably, channel condition information comprises CQI (CQI) information, order designator (RI) information and precoding designator (PMI) information.
By the present invention, adopt terminal to use pilot signal to determine to include the channel condition information of N associating PMI on the system bandwidth; Terminal is fed back described channel condition information on PUSCH or PUCCH.Wherein, system bandwidth (Wideband) is closed for the S subband set of high-rise configuration, N is greater than 1 and less than the integer of S, the ratio of precision that has solved feeding back channel state information is low to cause the result of antenna calibration inaccurate, thereby the problem that causes systematic function to descend, and then reached the effect that improves systematic function.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the channel state information feedback method of the embodiment of the invention; And
Fig. 2 is the structured flowchart according to the channel condition information feedback device of the embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Present embodiment provides a kind of channel state information feedback method, and Fig. 1 is the flow chart according to the channel state information feedback method of the embodiment of the invention, and as shown in Figure 1, this method comprises following step S102 and step S104.
Step S102: terminal uses pilot signal to determine to include the channel condition information of N associating PMI information on the system bandwidth (Wideband).
Step S104: terminal is fed back this channel condition information on PUSCH or PUCCH.
Wherein, system bandwidth (Wideband) is closed for the S subband set of high-rise configuration, and N is greater than 1 and less than the integer of S.
Pass through above-mentioned steps, terminal is determined channel condition information by pilot signal, this channel condition information includes N associating PMI on the system bandwidth, and this channel condition information fed back on PUSCH and PUCCH, overcome the lower problem of channel information feedback method feedback accuracy in the correlation technique, thereby improved the accuracy of feedback information, thereby improved communication system performance.In the present embodiment, only the channel condition information that carries N associating PMI on the system bandwidth is fed back, whole subbands is not carried out the PMI feedback respectively, lowered the feedback overhead of system to a certain extent.
Need to prove that the implication that S subband and system carry out the system broadband (wideband) in the resource granularity in the resource division is identical, wherein, this system broadband is meant the resource granularity.
Preferably, in eight antenna systems, this associating PMI comprises i1 and i2, and in four antenna systems, this associating PMI is single PMI.
For on the PUSCH or the feedback of carrying out channel condition information on the PUCCH several different methods can be arranged, because PMI is different with the content that eight antenna systems comprise in four antenna systems, can single PMI of four antenna systems be fed back, also can i1 and the i2 that PMI in eight antenna systems comprises be fed back, in eight antenna systems in the PMI feedback procedure, i1 can be selected to feed back, also i2 can be fed back.
When implementing, at S subband of high level configuration, also be system bandwidth, can adopt one of following four kinds of modes on PUSCH or PUCCH, to feed back this channel condition information.
Mode one: unite PMI and broadband order indicator information RI for CQI, the N on the system bandwidth of each subband on feedback broadband CQI, broadband P MI, the system bandwidth;
Mode two: the CQI of each subband on feedback broadband CQI, broadband first precoding designator index i1 and the broadband second precoding designator index i2, the system bandwidth, the N on the system bandwidth associating second precoding designator index i2 and the broadband RI;
Mode three: the CQI of each subband on feedback broadband CQI, broadband i1, broadband i2, the system bandwidth, the N on the system bandwidth the associating first precoding designator index i1 and N associating second precoding designator index i2 and the broadband RI;
In the above-mentioned feedback model, when taking into account the CQI feedback accuracy, increased the feedback information of N associating PMI on system bandwidth, improved feedback accuracy, and simple extension improved for the method for each subband feedback PMI information, consider the problem that feedback overhead is excessive, thereby improved the performance of system.
In above-mentioned preferred implementation, subband CQI and broadband CQI all can feed back with the form of differential CQI.Use differential broadband CQI to reduce the overhead bit that is used to transmit CQI.
Particularly, the differential CQI of this broadband CQI can be based on the differential CQI between the streams of code words.Preferably, when the streams of code words number greater than 1 the time, the broadband CQI of other streams of code words can be based on the differential CQI of the broadband CQI of first streams of code words.
Particularly, subband CQI can be based on the differential CQI between the streams of code words; Perhaps subband CQI can be based on the differential CQI of broadband CQI; Preferably, when the streams of code words number greater than 1 the time, the subband CQI of other streams of code words can be based on the differential CQI of the subband CQI of first streams of code words; Preferably, the subband CQI on each streams of code words can be based on the differential CQI of the broadband CQI on the same code word stream.
Preferably, the value of N can have following mode according to system's needs:
Mode one: N can be for greater than 1 and less than the fixed integer of S.Preferably, this fixed integer N value can be defined as fixed integer according to system requirements configuration or empirical value.Preferably, this fixed integer N can be 2,3,4 etc.Preferably, when N is 2, can the reponse system bandwidth go forward the PMI value of half part subband and the PMI value of latter half subband, perhaps feed back the PMI value of a best subband of in system bandwidth channel quality and the PMI value of a poorest subband, perhaps feed back in the system bandwidth channel quality PMI value of relatively poor S/2 the subband of channel quality in the PMI value of S/2 subband and the system bandwidth preferably;
Mode two: N can be for greater than 1 and less than the transformable integer of S.
Preferably, one of can be as follows select the N value:
The base station can be determined the value of this N according to the configuration of system, and the value of this N is sent to terminal.
The base station can be determined the value of N according to channel condition; Perhaps, the base station can be determined the value of N according to the size that postpones between antenna; Perhaps, this N value can be determined according to the indication of upper strata instruction in the base station; Perhaps, terminal is fed back the value of N simultaneously when the base station feedback channel condition information;
Terminal can be confirmed the value of N according to the situation of channel quality conditions, and to base station feedback.
In another embodiment, also provide a kind of channel condition information feedback software, this software is used for carrying out the technical scheme that the foregoing description and preferred embodiment are described.
In another embodiment, also provide a kind of storage medium, stored above-mentioned data transmission software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
The embodiment of the invention also provides a kind of channel condition information feedback device, this channel condition information feedback device can be used to realize above-mentioned channel state information feedback method and preferred implementation, carried out explanation, repeat no more, below the module that relates in this channel condition information feedback device is described.As used below, the combination of the software and/or the hardware of predetermined function can be realized in term " module ".Although the described system and method for following examples is preferably realized with software, hardware, perhaps the realization of the combination of software and hardware also may and be conceived.
Fig. 2 is the structured flowchart according to the channel condition information feedback device of the embodiment of the invention, and as shown in Figure 2, this device comprises: determination module 22 and feedback module 24 are elaborated to said structure below.
Determination module 22 is used for terminal and uses pilot signal to determine to include the channel condition information of N associating PMI on the system bandwidth; Feedback module 24 is connected to determination module 22, is used for the channel condition information that feedback determination module 22 is determined on PUSCH or PUCCH; Wherein, system bandwidth (Wideband) is closed for the S subband set of high-rise configuration, and N is greater than 1 and less than the integer of S.
Preferably, feedback module 24 is used for according to one of following feedback model feeding back channel state information on PUSCH or PUCCH:
In four antenna systems, unite PMI and broadband RI for CQI, the N on the system bandwidth of each subband on feedback broadband CQI, broadband P MI, the system bandwidth;
In eight antenna systems, the CQI of each subband on feedback broadband CQI, broadband i1, broadband i2, the system bandwidth unites i2 and broadband RI for the N on the system bandwidth;
In eight antenna systems, i2 and broadband RI are united in i1, N of CQI, the N on the system bandwidth the associating of each subband on feedback broadband CQI, broadband i1, broadband i2, the system bandwidth.
Preferably, subband CQI and broadband CQI all can adopt the form of differential CQI to feed back.
Particularly, the differential CQI of broadband CQI can be based on the differential CQI between the streams of code words.Preferably, when the streams of code words number greater than 1 the time, the broadband CQI of other streams of code words can be based on the differential CQI of the broadband CQI of first streams of code words;
Particularly, subband CQI can be based on the differential CQI between the streams of code words; Perhaps subband CQI can be based on the differential CQI of broadband CQI; Preferably, when the streams of code words number greater than 1 the time, the subband CQI of other streams of code words can be based on the differential CQI of the subband CQI of first streams of code words; Preferably, the subband CQI on each streams of code words can be based on the differential CQI of the broadband CQI on the same code word stream;
Wherein, the value about N has following method:
N can be for greater than 1 and less than the fixed integer of S.Preferably, this fixed integer N value can be defined as fixed integer according to system requirements configuration or empirical value.
Preferably, this fixed integer N can be 2,3,4 etc.
Preferably, for example: when N is 2, one of can be as follows select the N value:
Method one: can the reponse system bandwidth go forward the PMI value of half part subband and the PMI value of latter half subband;
Method two: the PMI value of the PMI value of the subband that feedback channel quality in system bandwidth is best and a poorest subband;
Method three: feedback is the channel quality PMI value of relatively poor S/2 the subband of channel quality in the PMI value of S/2 subband and the system bandwidth preferably in system bandwidth.
Perhaps, N can be for greater than 1 and less than the transformable integer of S.Preferably, one of can be as follows select the N value:
Method one: the base station can be determined the value of this N according to the configuration of system, and the value of this N is sent to terminal;
Method two: terminal can be confirmed the value of N according to the situation of channel quality conditions, and to base station feedback;
Method three: the base station can be determined the value of N according to the size that postpones between antenna;
Method four: this N value can be determined according to the indication of upper strata instruction in the base station;
Method five: terminal is fed back the value of N simultaneously when the base station feedback channel condition information.
Describe below in conjunction with preferred embodiment, following preferred embodiment combines the foregoing description and preferred implementation.
Preferred embodiment one
Present embodiment provides a kind of feedback method of channel status information, and this method comprises the steps:
Step S402:UE determines channel CQI, PMI and RI according to channel information.Wherein, this PMI information can comprise first precoding matrix indicators (i1) and second precoding matrix indicators (i2).
Step S404:UE on PUSCH to the base station reporting status information of channel.
Wherein, channel condition information comprises PMI information, CQI information and RI information;
Wherein, PMI information comprises single PMI in four antenna systems; PMI information comprises i1 and i2 in eight antenna systems;
Particularly, U E goes shared channel (PUSCH) upward to the base station feedback channel condition information physically according to one of following feedback on reservation method among the step S404.
Unite PMI and broadband order indicator information RI for CQI, the N on the system bandwidth of each subband on feedback broadband CQI, broadband P MI, the system bandwidth;
The CQI of each subband on feedback broadband CQI, the broadband first precoding designator index (i1) and the broadband second precoding designator index (i2), the system bandwidth, the N on the system bandwidth associating second precoding designator index (i2) and the broadband RI;
The CQI of each subband on feedback broadband CQI, broadband first precoding designator index i1 and the broadband second precoding designator index i2, the system bandwidth, the N on the system bandwidth the associating first precoding designator index (i1) and N associating second precoding designator index (i2) and the broadband RI;
Wherein, this system bandwidth also is broadband (Wideband), for the S subband set of high level configuration is closed.
Wherein, N is a fixed integer.
Preferably, N can be floor (S/M) or ceil (S/M); Wherein M is greater than 1 and less than the integer of S; Wherein, floor represents to round downwards, and ceil represents to round up; Perhaps, N can be for fixing greater than 1 and less than the integer of S; Preferably, N can for one greater than 1 and less than the integer of S, for example 2,3 etc.; Especially, when N is 2, can the reponse system bandwidth go forward the PMI value of half part subband and the PMI value of latter half subband, perhaps feed back the PMI value of a best subband of in system bandwidth channel quality and the PMI value of a poorest subband, perhaps feed back in the system bandwidth channel quality PMI value of relatively poor S/2 the subband of channel quality in the PMI value of S/2 subband and the system bandwidth preferably.
Preferably, subband CQI and broadband CQI all can feed back with the form of differential CQI.
Particularly, the differential CQI of broadband CQI can be based on the differential CQI between the streams of code words.Preferably, when the streams of code words number greater than 1 the time, the broadband CQI of other streams of code words can be based on the differential CQI of the broadband CQI of first streams of code words.
Particularly, subband CQI can be based on the differential CQI between the streams of code words; Perhaps subband CQI can be based on the differential CQI of broadband CQI; Preferably, when the streams of code words number greater than 1 the time, the subband CQI of other streams of code words can be based on the differential CQI of the subband CQI of first streams of code words; Preferably, the subband CQI on each streams of code words can be based on the differential CQI of the broadband CQI on the same code word stream.
Preferred embodiment two
Present embodiment provides a kind of feedback method of channel status information, and this method comprises the steps:
Step S502, UE determines channel quality indication (CQI) information (CQI), precoding matrix indicators information (PMI) and order indicator information (RI) according to channel information.Wherein, PMI information can comprise the first precoding matrix indicators i1 and the second precoding matrix indicators i2.
Step S504, UE is to the base station reporting status information of channel.
Wherein, channel condition information comprises PMI information, CQI information and RI information;
Wherein, PMI information comprises single PMI in four antenna systems; PMI information comprises i1 and i2 in eight antenna systems;
Particularly, U E goes shared channel (PUSCH) upward to the base station feedback channel condition information physically according to one of following feedback on reservation method among the step S404.
Unite PMI and broadband order indicator information RI for CQI, the N on the system bandwidth of each subband on feedback broadband CQI, broadband P MI, the system bandwidth;
The CQI of each subband on feedback broadband CQI, broadband first precoding designator index i1 and the broadband second precoding designator index i2, the system bandwidth, the N on the system bandwidth associating second precoding designator index i2 and the broadband RI;
The CQI of each subband on feedback broadband CQI, broadband first precoding designator index i1 and the broadband second precoding designator index i2, the system bandwidth, the N on the system bandwidth the associating first precoding designator index i1 and N associating second precoding designator index i2 and the broadband RI;
Wherein, system bandwidth also is broadband (Wideband), for the S subband set of high level configuration is closed.
Wherein, N is greater than 1 and less than the transformable integer of S.
Preferably, one of can be as follows select the N value:
The base station can be determined the value of this N according to the configuration of system, and the value of this N is sent to terminal;
The base station can be determined the value of N according to channel condition; Perhaps, the base station can be determined the value of N according to the size that postpones between antenna; Perhaps, this N value can be determined according to the indication of upper strata instruction in the base station; Perhaps, terminal is fed back the value of N simultaneously when the base station feedback channel condition information;
Terminal can be confirmed the value of N according to the situation of channel quality conditions, and to base station feedback.
Preferably, subband CQI and broadband CQI all can feed back with the form of differential CQI.
Particularly, the differential CQI of broadband CQI can be based on the differential CQI between the streams of code words.Preferably, when the streams of code words number greater than 1 the time, the broadband CQI of other streams of code words can be based on the differential CQI of the broadband CQI of first streams of code words.
Particularly, subband CQI can be based on the differential CQI between the streams of code words; Perhaps subband CQI can be based on the differential CQI of broadband CQI; Preferably, when the streams of code words number greater than 1 the time, the subband CQI of other streams of code words can be based on the differential CQI of the subband CQI of first streams of code words; Preferably, the subband CQI on each streams of code words can be based on the differential CQI of the broadband CQI on the same code word stream.
Pass through the foregoing description, a kind of channel state information feedback method and device are provided, can determine channel condition information by pilot signal, this channel condition information includes but not limited to N PMI on the system bandwidth, and this channel condition information fed back on PUSCH and PUCCH, overcome the problem that the channel information feedback method feedback accuracy is lower in the correlation technique and (among the feedback model 3-1 and feedback model 1-2 that in the Closed-Loop Spatial Multiplexing system, is supported, all had the not enough problem of feedback accuracy.As in feedback model 3-1, only feeding back broadband P MI.If change feedback model 1-2 into, though the PMI feedback accuracy gets a promotion, CQI has only broadband feedback, still has the problem of feedback accuracy), thus the result's of antenna calibration accuracy improved, thus improved communication system performance.And only the channel condition information that carries N PMI on the system bandwidth is fed back, the PMI to whole subbands does not feed back, and has lowered the feedback overhead of system to a certain extent.Need to prove that these technique effects are not that above-mentioned all execution modes have, some technique effect is that some preferred implementation just can obtain.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, carry out by calculation element thereby they can be stored in the storage device, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a channel state information feedback method is characterized in that comprising the steps:
Terminal uses pilot signal to determine to include the channel condition information of N associating precoding designator index PMI information on the system bandwidth;
Described terminal is fed back described channel condition information;
Wherein, described system bandwidth is closed for the S subband set of high-rise configuration, and N is greater than 1 and less than the integer of S.
2. method according to claim 1 is characterized in that, in eight antenna systems, described PMI information comprises the first precoding designator index i1 and the second precoding designator index i2, and in four antenna systems, described PMI information is single PMI.
3. method according to claim 2 is characterized in that, described terminal is fed back described channel condition information and comprised:
Described terminal is fed back described channel condition information according to one of following feedback model:
Unite PMI and broadband order indicator information RI for N on feedback broadband CQI, broadband P MI, the described system bandwidth on the CQI of each subband, the described system bandwidth;
Feed back the CQI of each subband on described broadband CQI, broadband i1, broadband i2, the described system bandwidth, the N on the described system bandwidth associating i2 and described broadband RI;
Feed back N associating i1, N associating i2 and described broadband RI on the CQI of each subband on described broadband CQI, described broadband i1, described broadband i2, the described system bandwidth, the described system bandwidth.
4. method according to claim 3 is characterized in that, described broadband CQI comprises one of following and combination: absolute broadband CQI, differential broadband CQI.
5. method according to claim 3 is characterized in that, each the subband CQI on the described system bandwidth comprises one of following and combination: absolute subband CQI, difference subband CQI.
6. according to each described method in the claim 1 to 5, it is characterized in that, the value of described N for fixing greater than 1 and less than the integer value of S or transformable greater than 1 and less than the integer value of S.
7. according to each described method in the claim 1 to 5, it is characterized in that described channel condition information comprises channel quality indicator CQI information, order designator RI information and precoding designator PMI information.
8. a channel condition information feedback device is applied to terminal, it is characterized in that comprising:
Determination module is used to use pilot signal to determine to include the channel condition information of N associating PMI information on the system bandwidth;
Feedback module is used to feed back described channel condition information;
Wherein, described system bandwidth is closed for the S subband set of high-rise configuration, and N is greater than 1 and less than the integer of S.
9. device according to claim 8 is characterized in that, described feedback module is used for according to the described channel condition information of one of following feedback model feedback:
In four antenna systems, unite PMI and broadband order indicator information RI for N on feedback broadband CQI, broadband P MI, the described system bandwidth on the CQI of each subband, the described system bandwidth;
In eight antenna systems, feed back the CQI of each subband on described broadband CQI, broadband i1, broadband i2, the described system bandwidth, the N on the described system bandwidth associating i2 and described broadband RI;
In described eight antenna systems, feed back N associating i1, N associating i2 and described broadband RI on the CQI of each subband on described broadband CQI, described broadband i1, described broadband i2, the described system bandwidth, the described system bandwidth;
Feed back the associating RI on N associating i2, described broadband RI and the described system bandwidth on N associating i1 on the CQI of each subband on described broadband CQI, described broadband i1 and described broadband i2, the described system bandwidth, the described system bandwidth, the described system bandwidth.
10. according to Claim 8 or 9 described devices, it is characterized in that, the value of described N for fixing greater than 1 and less than the integer value of S, or transformable greater than 1 and less than the integer value of S.
11. according to Claim 8 or 9 described devices, it is characterized in that described channel condition information comprises channel quality indicator CQI information, order designator RI information and precoding designator PMI information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110221246.8A CN102271028B (en) | 2011-08-03 | 2011-08-03 | Method and device for feeding back channel state information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110221246.8A CN102271028B (en) | 2011-08-03 | 2011-08-03 | Method and device for feeding back channel state information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102271028A true CN102271028A (en) | 2011-12-07 |
| CN102271028B CN102271028B (en) | 2017-04-12 |
Family
ID=45053201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110221246.8A Expired - Fee Related CN102271028B (en) | 2011-08-03 | 2011-08-03 | Method and device for feeding back channel state information |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102271028B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108111211A (en) * | 2017-08-11 | 2018-06-01 | 中兴通讯股份有限公司 | Feedback method, device and the management equipment of channel state information |
| CN108631844A (en) * | 2017-03-24 | 2018-10-09 | 电信科学技术研究院 | A kind of method, terminal and network side equipment obtaining channel state information |
| CN109660288A (en) * | 2019-03-05 | 2019-04-19 | 武汉虹信通信技术有限责任公司 | A kind of information uploading method and device |
| CN111164916A (en) * | 2017-10-02 | 2020-05-15 | 高通股份有限公司 | Subband Channel State Information (CSI) omission for type II CSI |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867447A (en) * | 2010-04-30 | 2010-10-20 | 中兴通讯股份有限公司 | Feedback method of channel state information and terminal |
| CN101917260A (en) * | 2010-08-18 | 2010-12-15 | 中兴通讯股份有限公司 | Feedback method and device of channel state information |
| WO2010149089A1 (en) * | 2010-01-08 | 2010-12-29 | 中兴通讯股份有限公司 | Feedback transmission method of channel state information and user equipment |
| CN101969363A (en) * | 2010-09-30 | 2011-02-09 | 中兴通讯股份有限公司 | Channel state information feedback method and terminal |
| CN102013956A (en) * | 2010-11-25 | 2011-04-13 | 中兴通讯股份有限公司 | Method and device for feeding back channel state information |
-
2011
- 2011-08-03 CN CN201110221246.8A patent/CN102271028B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010149089A1 (en) * | 2010-01-08 | 2010-12-29 | 中兴通讯股份有限公司 | Feedback transmission method of channel state information and user equipment |
| CN101867447A (en) * | 2010-04-30 | 2010-10-20 | 中兴通讯股份有限公司 | Feedback method of channel state information and terminal |
| CN101917260A (en) * | 2010-08-18 | 2010-12-15 | 中兴通讯股份有限公司 | Feedback method and device of channel state information |
| CN101969363A (en) * | 2010-09-30 | 2011-02-09 | 中兴通讯股份有限公司 | Channel state information feedback method and terminal |
| CN102013956A (en) * | 2010-11-25 | 2011-04-13 | 中兴通讯股份有限公司 | Method and device for feeding back channel state information |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631844A (en) * | 2017-03-24 | 2018-10-09 | 电信科学技术研究院 | A kind of method, terminal and network side equipment obtaining channel state information |
| CN108111211A (en) * | 2017-08-11 | 2018-06-01 | 中兴通讯股份有限公司 | Feedback method, device and the management equipment of channel state information |
| CN108111211B (en) * | 2017-08-11 | 2021-11-02 | 中兴通讯股份有限公司 | Feedback method and device of channel state information and management equipment |
| CN111164916A (en) * | 2017-10-02 | 2020-05-15 | 高通股份有限公司 | Subband Channel State Information (CSI) omission for type II CSI |
| CN111164916B (en) * | 2017-10-02 | 2023-05-16 | 高通股份有限公司 | Subband state information (CSI) omission for type II CSI |
| CN109660288A (en) * | 2019-03-05 | 2019-04-19 | 武汉虹信通信技术有限责任公司 | A kind of information uploading method and device |
| CN109660288B (en) * | 2019-03-05 | 2022-01-25 | 武汉虹信科技发展有限责任公司 | Information reporting method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102271028B (en) | 2017-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101877627B (en) | The feedback method of channel condition information and terminal | |
| CN101931513B (en) | The feedback method of channel condition information and terminal | |
| CN102111246B (en) | The method and user equipment of feeding back channel state information | |
| CN102237958B (en) | Method and device for reporting CSI (Channel State Information) based on PUCCH (Physical Uplink Control Channel) | |
| CN103780358B (en) | A kind of method and terminal of determining channel state information | |
| CN102291213B (en) | A kind of terminal and method for calculating channel quality indication (CQI) information | |
| CN101867447B (en) | The feedback method of channel condition information and terminal | |
| CN102469496B (en) | Method and device for reporting channel quality information | |
| CN102237955B (en) | Channel state information reporting method and device | |
| CN101969363B (en) | Channel state information feedback method and terminal | |
| CN101867458B (en) | The feedback method of channel condition information and device | |
| CN103944686B (en) | The CSI feedback method and device of multi-user MIMO system | |
| CN102237968B (en) | Channel state information transmission method and device | |
| CN102469489B (en) | Method and device for reporting channel quality indicator (CQI) | |
| JP5405815B2 (en) | Multi-user MIMO system, base station, user equipment, and CQI feedback method | |
| CN102237969A (en) | Channel state information transmission method and device | |
| CN102170335A (en) | Method and apparatus for reporting channel state information | |
| CN102263613B (en) | A kind of channel state information feedback method and device | |
| CN102291229B (en) | Channel state information feedback method, receiving method and equipment | |
| CN101820335B (en) | A kind of method using secondary code words feeding back channel state information | |
| CN102355338A (en) | Method and device for transmitting channel information | |
| CN106330272A (en) | Precoding matrix indicator (PMI) sending and receiving method, and devices | |
| CN101183890A (en) | Code book based CQI feedback method for multi-user precoding system | |
| CN103580812A (en) | Channel state information feedback method and user equipment | |
| CN103905098A (en) | MIMO scheduling method, system and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20200803 |