CN102291219B - Method and system for feeding back channel information, terminal equipment and network equipment - Google Patents

Method and system for feeding back channel information, terminal equipment and network equipment Download PDF

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CN102291219B
CN102291219B CN2010102098311A CN201010209831A CN102291219B CN 102291219 B CN102291219 B CN 102291219B CN 2010102098311 A CN2010102098311 A CN 2010102098311A CN 201010209831 A CN201010209831 A CN 201010209831A CN 102291219 B CN102291219 B CN 102291219B
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frequency range
pmi
subband
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CN102291219A (en
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张然然
高秋彬
肖国军
孙韶辉
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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Abstract

The invention discloses a method and system for feeding back channel information, terminal equipment and network equipment, relating to a wireless communication technology. The method comprises the following steps of: partitioning a system bandwidth into P frequency bands; selecting a preferred frequency band or M preferred sub-bands according to the partitioned frequency bands; correspondingly determining a preferred PMI (Pre-coding Matrix Indicator) value and a corresponding CQI (Channel Quality Indicator) value; and acquiring a preferred PMI value and a corresponding CQI value of a corresponding integral frequency band according to the partitioned frequency bands. The preferred PMI value and the corresponding CQI value are determined on the basis of frequency band partition, so that the selected PMI is required to be suitable for a considered frequency band, and the feedback accuracy of channel information is enhanced. In the embodiment of the invention, the fed back PMI values comprise PMI1 values for representing the channel long-time/broadband characteristic and PMI2 values for representing the channel short-time/frequency selecting characteristic, so that feedback of double PMIs is realized; and the invention is suitable for LTE (Long Term Evolution) Rel-10.

Description

A kind of method of feedback channel information, system, terminal equipment and the network equipment
Technical field
The present invention relates to wireless communication technology, relate in particular to a kind of method, system, terminal equipment and network equipment of feedback channel information.
Background technology
At multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Output) in system, if transmitter can be known channel information in some way, just can be optimized transmitted signal according to the characteristic of channel, thereby improve the quality of reception and reduce the requirement to Receiver Complexity.The general mode feedback channel information that adopts quantized channel information in real system, to reduce feedback overhead, improve the system efficiency of transmission.
Adopt implicit expression CSI (Channel State Information, the channel condition information) feedback method based on code book in LTE (Long-Term Evolution, Long Term Evolution) Rel-8/9.Transmission mode 4, 5, 6 and PMI (the Precoding Matrix Indicator of transmission mode 8, the label of pre-coding matrix) in feedback model, UE (User Equipment, subscriber equipment) based on public reference signal (CRS, Cell-specific Reference Signal) measure down channel, and the data fluxion (RI that can support to eNB (evolved NodeB) feeding back downlink link according to the reception & disposal algorithm of himself, Rank Indication) and PMI, UE also needs to feed back the channel quality indication (CQI of each code word simultaneously, Channel Quality Indication), wherein, in the computational process of CQI, UE hypothesis eNB has been used the RI/PMI of its recommendation.
In LTE Rel-8/9, after UE receives the scheduling grant indication of network side transmission, UE is used ascending physical signal shared channel (PUSCH, Physical Uplink Shared Channel) to complete the non-periodic feedback channel information.The high-level signaling that the size of CQI report aperiodic and information format are sent by network side is configured.
When UE carries out feedback of channel information, the feedback model used and feedback kind can reference tables 1, and wherein, pattern 2-2 is that the UE that comprises the PMI feedback selects the subband feedback.
CQI and PMI feedback kind in table 1 LTE Rel-8/9PUSCH non-periodic feedback pattern
In LTE Rel-8/9, the implementation method of pattern 2-2 feedback system comprises:
Step 1, UE are by the selection of combining of PMI and subband, from sets of subbands S, (be also full bandwidth, comprise altogether N subband) in select the preferred subband of M, and a selected M subband a common corresponding preferred PMI, wherein PMI and subband combines the algorithm of selecting to refer to that the factor that considers PMI and subband is selected;
Usually carrying out subband while selecting, be to go out M relatively optimum subband toward the second choice of opimization successively from optimum, a selected M subband institute preferred PMI of correspondence jointly is generally, and makes preferably one of the average transmission performance of this M subband.
Step 2, UE feed back the corresponding CQI value of a selected M subband (the corresponding CQI value of each code word), the prerequisite of calculating CQI value is, UE hypothesis base station is the selected preferred PMI corresponding to this M preferred subband in selected M preferably adopts step S101 on subband;
Step 3, UE feedback are corresponding to the individual preferably common preferred PMI of subband of this M;
Step 4, UE hypothesis base station adopt the full bandwidth transmission, calculate a preferred PMI corresponding to full bandwidth;
Step 5, CQI value (each code word is corresponding to a CQI value) corresponding to UE feedback full bandwidth, the prerequisite of calculating the CQI value is that UE supposes the preferred PMI corresponding to full bandwidth that base station adopts it to select on full bandwidth;
Step 6, UE feed back the preferred PMI corresponding to full bandwidth.
For transmission mode 4 and transmission mode 8, the PMI fed back and CQI value are based on that the RI value of feedback obtains; To with other transmission modes, suppose RI=1.
Each subband comprises k Resource Block (RB, Resource Block), and the relation of subband size k and selected sub band number M and downlink system bandwidth is as shown in table 2.The selected subband index of indication UE needs
Figure GSB0000114333020000031
individual bit, wherein N M For choose the individual combined number of M from N subband.
The relation of table 2LTE Rel-8/9 subband size (k) and sub band number (M) and downlink system bandwidth
Figure GSB0000114333020000033
With the configuration of 4 antennas, the 20MHz bandwidth situation is example, and the content comprised of pattern 2-2 and corresponding bit number are as shown in table 3.
The content of table 3 LTE Rel-8/9PUSCH non-periodic feedback pattern 2-2
Figure GSB0000114333020000034
At present, LTE Rel-10 standard is just in formulation process, strengthen plan according to the descending MIMO feedback of LTE Rel-10, a pre-coding matrix (W) in LTE Rel-10 version is synthetic by two matrixes (W1 and W2), wherein W1 is for characterizing the long time/broadband character of channel, and W2 be used for characterizing channel in short-term/frequency selective characteristic.W1 and W2 by two PMI indications, are PMI1 and PMI2 respectively.Obviously, original Rel-8/9 feedback mechanism can't be used in the feedback of channel information of Rel-10.
Like this, LTE Rel-8/9PUSCH non-periodic feedback pattern 2-2 is owing to only feeding back a PMI, so can't be applied to the system of two PMI feedbacks such as LTE Rel-10.
And, in the situation that all can there be certain time delay (maximum of LTE regulation can not surpass 65ns) in imperfect antenna calibration between the radio-frequency transmissions circuit of any two antennas.Shi Yanhui causes the phase rotating in frequency domain.If system bandwidth is larger, in these frequency domains that cause due to different delay between antenna, phase rotating can make any one pre-coding matrix in code book all can't be applicable to the whole system bandwidth.
Concrete, if 8-discrete Fourier transform (DFT) (DFT, Discrete Fourier Transform) vector for code book, the differential seat angle between two adjacent vectors is π/4, the bandwidth range that can apply same precoding vector is
Figure GSB0000114333020000041
be the 2MHz bandwidth, in this 2MHz bandwidth, it is no problem using a broadband P MI, may can not bring too large performance loss even consider deviation to adjacent precoding vector yet, bandwidth range can be loosened to 5MHz, so in this 5MHz bandwidth, using a broadband P MI is also acceptable, if but system bandwidth is larger, for example system bandwidth is 20MHz, in the bandwidth of this 20MHz, use a broadband P MI so, must cause this PMI unmatched problem on some subbands.
Feedback content by front can see, in existing LTE Rel-8/9PUSCH non-periodic feedback pattern 2-2, no matter amount of bandwidth how, and system feedback is only fed back a full bandwidth PMI and 1 subband PMI, does not consider the impact of imperfect antenna calibration fully.Phase rotating in the frequency domain caused due to different delay between antenna, will inevitably cause selected PMI can only be applicable to a part of frequency range in the situation that system bandwidth is larger, thereby cause the decline of feedback of channel information precision.
At present for this problem, can only or reduce the impact of imperfect antenna calibration by the mode of the calibration of eating dishes without rice or wine by antenna calibration, base station self calibration as far as possible, but have no idea antenna calibration to very accurate, when bandwidth is larger, between antenna, the caused phase rotating of different delay still forms very large impact to the feedback of channel information precision.
Summary of the invention
The embodiment of the present invention provides a kind of method, system, terminal equipment and network equipment of feedback channel information, to improve the feedback of channel information precision.
A kind of method of feedback channel information comprises:
Receive the frequency range division information that network side sends, described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, and described P is at least 1;
Receive the control signal for triggering terminal side feedback channel information that network side sends;
Based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the label PMI value of the common corresponding pre-coding matrix that meets predefined rule of M subband as a PMI value, and according to definite corresponding the first channel quality indicator (CQI) value of selected subband of a PMI value; Perhaps based on described frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to described preferred frequency range is as a PMI value, and determine the corresponding CQI value of selected frequency range according to a PMI value;
Based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of described the 2nd PMI value;
The index of the data fluxion RI value that can support to network side feeding back downlink link, selected preferred frequency range or selected subband, a described PMI value, a CQI value and the 2nd PMI value, the 2nd CQI value.
A kind of method of feedback channel information comprises:
Send the frequency range division information to end side, described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, and described P is at least 1;
Send the control signal for triggering terminal side feedback channel information to end side;
The receiving terminal side group is in the channel information of described frequency range division information and system bandwidth feedback;
The channel information of described end side based on described frequency range division information and system bandwidth feedback specifically comprises:
The index of data fluxion RI value, selected preferred frequency range or selected subband that down link can be supported, label PMI value, the first channel quality indicator (CQI) value and the 2nd PMI value of the first pre-coding matrix, the 2nd CQI value, it determines that method is:
Based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the common corresponding PMI value that meets predefined rule of M subband as a PMI value, and according to the definite corresponding CQI value of selected subband of a PMI value; Perhaps based on described frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to described preferred frequency range is as a PMI value, and determine corresponding the first channel quality CQI value of selected frequency range according to a PMI value;
Based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of described the 2nd PMI value.
A kind of system of feedback channel information comprises:
The network equipment, for sending the frequency range division information and for the control signal of triggering terminal side feedback channel information, and receive the channel information of feedback, and described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, and described P is at least 1;
Terminal equipment, the frequency range division information and the control signal that for receiving the described network equipment, send, and determine channel information based on described frequency range division information and system bandwidth, and feed back described channel information to the described network equipment;
Described terminal equipment specifically comprises:
Receiving element, the frequency range division information and the control signal that for receiving the described network equipment, send;
Processing unit, be used for based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the label PMI value of the common corresponding pre-coding matrix that meets predefined rule of M subband as a PMI value, and according to definite corresponding the first channel quality CQI value of selected subband of a PMI value; Perhaps based on described frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to described preferred frequency range is as a PMI value, and determine the corresponding CQI value of selected frequency range according to a PMI value; Based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of described the 2nd PMI value;
Feedback unit, for the index of the data fluxion RI value that can support to network side feeding back downlink link, selected preferred frequency range or selected subband, a described PMI value, a CQI value and the 2nd PMI value, the 2nd CQI value.
A kind of terminal equipment of feedback channel information comprises:
Receiving element, for receiving frequency range division information that the network equipment sends and, for the control signal of triggering terminal side feedback channel information, described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, described P is at least 1;
Processing unit, for determining channel information based on described frequency range division information and system bandwidth;
Feedback unit, for feeding back described channel information to the described network equipment;
Described processing unit specifically comprises:
Subband is chosen subelement, be used for based on described frequency range division information and system bandwidth, select preferably subband of M in system bandwidth, and in definite system bandwidth the label PMI value of the pre-coding matrix that meets predefined rule of M the common correspondence of subband as a PMI value; Perhaps frequency range is chosen subelement, for based on described frequency range division information, selecting a preferred frequency range, and determines that preferred PMI value corresponding to described preferred frequency range is as a PMI value;
The one CQI value is determined subelement, for choose subelement or frequency range according to described subband, chooses definite corresponding the first channel quality CQI value of selected subband of a PMI value that subelement is determined;
Whole frequency range PMI determines subelement, for based on described frequency range division information and system bandwidth, obtains in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value;
The 2nd CQI value is determined subelement, for determine the 2nd PMI value that subelement is determined according to described whole frequency range PMI, determines corresponding the 2nd CQI value of full bandwidth;
Described feedback unit specifically for:
Index, a PMI value, a CQI value, the 2nd PMI value and the 2nd CQI value of data fluxion RI value, selected preferred frequency range or selected subband that the feeding back downlink link can be supported.
A kind of network equipment of feedback channel information comprises:
The frequency range division unit, for the situation according to system bandwidth and antenna calibration, be divided into P frequency range by system bandwidth, and described P is at least 1, and each frequency range comprises Q subband, and Q is not less than as the predefined number of sub-bands M that should feed back of system bandwidth;
Frequency range division information transmitting element, for the frequency range division result according to described frequency range division unit, send the frequency range division information to end side, and described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into;
Trigger element, for sending the control signal for triggering terminal side feedback channel information to end side;
Receiving element, the channel information for the receiving terminal lateral root according to described frequency range division information and system bandwidth feedback, wherein, the channel information of described end side based on described frequency range division information and system bandwidth feedback specifically comprises:
The index of data fluxion RI value, selected preferred frequency range or selected subband that down link can be supported, label PMI value, the first channel quality indicator (CQI) value and the 2nd PMI value of the first pre-coding matrix, the 2nd CQI value, it determines that method is:
Based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the common corresponding PMI value that meets predefined rule of M subband as a PMI value, and according to the definite corresponding CQI value of selected subband of a PMI value; Perhaps based on described frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to described preferred frequency range is as a PMI value, and determine corresponding the first channel quality CQI value of selected frequency range according to a PMI value;
Based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of described the 2nd PMI value.
The embodiment of the present invention provides a kind of method, system, terminal equipment and network equipment of feedback channel information, by by the network equipment, system bandwidth being divided into to P frequency range, terminal equipment is according to the frequency range of dividing, determine channel information, because the calculating of channel information is based on the frequency range after division, thereby improve the feedback accuracy of channel information, a kind of system, terminal equipment and the network equipment of feedback channel information also are provided simultaneously, to realize according to the frequency range of dividing, determine channel information feedback.
And further, the PMI value of feeding back in the embodiment of the present invention all comprises for characterizing the PMI1 value of the long time/broadband character of channel, with for characterize channel in short-term/the PMI2 value of frequency selective characteristic, thereby realize the feedback of two PMI, be applicable to the application of LTE Rel-10.
The accompanying drawing explanation
One of method flow diagram of the non-periodic feedback channel information that Fig. 1 a provides for the embodiment of the present invention;
Determine the method flow diagram of channel information in the non-periodic feedback channel information method that Fig. 1 b provides for the embodiment of the present invention;
The method flow diagram corresponding with embodiment mono-that Fig. 2 provides for the embodiment of the present invention;
The method flow diagram corresponding with embodiment bis-that Fig. 3 provides for the embodiment of the present invention;
The method flow diagram corresponding with embodiment tri-that Fig. 4 provides for the embodiment of the present invention;
The method flow diagram corresponding with embodiment tetra-that Fig. 5 provides for the embodiment of the present invention;
The method flow diagram corresponding with embodiment five that Fig. 6 provides for the embodiment of the present invention;
Two of the method flow diagram of the non-periodic feedback channel information that Fig. 7 provides for the embodiment of the present invention;
The system configuration schematic diagram of the non-periodic feedback channel information that Fig. 8 provides for the embodiment of the present invention;
The terminal equipment structural representation of the non-periodic feedback channel information that Fig. 9 provides for the embodiment of the present invention;
The network equipment structural representation of the non-periodic feedback channel information that Figure 10 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of method of feedback channel information, system, terminal equipment and the network equipment, for phase rotating in the frequency domain caused due to different delay between antenna at present, in the situation that system bandwidth is larger, cause selected PMI can only be applicable to a part of frequency range, thereby cause the problem of the decline of feedback of channel information precision, system bandwidth is divided into to P frequency range, and according to the frequency range of dividing, select preferred frequency range or select M preferably subband, corresponding definite preferred PMI value and CQI value more accordingly, again according to divided frequency range, obtain preferred PMI value and the corresponding CQI value of corresponding whole frequency range.During due to definite preferred PMI value and corresponding CQI value, be all to carry out on the basis of dividing in frequency range, so selected PMI must be applicable to considered frequency range, thus the feedback accuracy of raising channel information.
And the PMI value of feeding back in the embodiment of the present invention all comprises for characterizing the PMI1 value of the long time/broadband character of channel, and for characterize channel in short-term/the PMI2 value of frequency selective characteristic, thereby the feedback of realization couple PMI is applicable to the application of LTE Rel-10.
The method of the non-periodic feedback channel information that as shown in Figure 1a, the embodiment of the present invention provides comprises:
The frequency range division information that step S101, reception network side send comprises in the frequency range division information: the number of frequency bands P that system bandwidth is divided into, and wherein P is at least 1;
The control signal for triggering terminal side feedback channel information that step S102, reception network side send;
Step S103, the frequency range division information based on system bandwidth and reception are determined channel information;
Step S104, to the network side feedback channel information.
In step S101, it is that network equipment carries out according to conditions such as channel width, antenna calibrations that frequency range is divided, general need to be carried out once when initial, perhaps repartition when needed frequency range, usually in the situation that the conditions such as channel width, antenna calibration are constant, do not need to repartition frequency range.
After end side receives the frequency range division information, can determine the number of sub-bands Q that each frequency range comprises according to system bandwidth, general Q is not less than as the predefined number of sub-bands M that should report of system bandwidth.
As shown in Figure 1 b, step S103 specifically comprises the method that the concrete frequency range division information based on system bandwidth and reception is determined channel information:
Step S1031, the frequency range based on divided and system bandwidth, select M preferably subband, from preferably going out M subband to the second choice of opimization successively, and in definite system bandwidth M preferably the common corresponding PMI value that meets predefined rule of subband as a PMI value;
Perhaps the Frequency Band Selection based on divided goes out a preferred frequency range, and determines that preferred PMI value corresponding to preferred frequency range is as a PMI value;
Wherein, preferably frequency range or preferred subband are generally in selected scope, and transmission performance is frequency range or subband relatively preferably.
Step S1032, according to a PMI value, determine selected frequency range or the corresponding CQI value of selected subband;
Step S1033, the frequency range based on divided and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value;
Step S1034, according to the 2nd PMI value, determine corresponding the 2nd CQI value of full bandwidth;
Now, step S104 is specially: to index, a PMI value, a CQI value and the 2nd PMI value, the 2nd CQI value of network side feedback RI value, selected preferred frequency range or selected subband.
Certainly, also can first carry out step S1033, step S1034, carry out again step S1031 and step S1032, when feedback, can after determining a parameter, be fed back, also can after determining several or whole parameters, be fed back, those skilled in the art can be applied in a flexible way according to actual conditions again.
Wherein, a PMI value comprises for characterizing a PMI1 value of the long time/broadband character of channel, and for characterize channel in short-term/a PMI2 value of frequency selective characteristic; The 2nd PMI value also comprises for characterizing the 2nd PMI1 value of the long time/broadband character of channel, and for characterize channel in short-term/the 2nd PMI2 value of frequency selective characteristic.
Step S103 determines that based on the frequency range division information channel information has numerous embodiments, is mainly reflected in:
In step S1031, frequency range based on divided and system bandwidth, select M preferably subband, and in definite system bandwidth M preferably the common corresponding preferred PMI value of subband as the concrete mode of a PMI value, have multiple, in step S1033, frequency range based on divided and system bandwidth, obtaining in the hypothesis communication process preferred PMI value while adopting the full bandwidth transmission also has multiple as the mode of the 2nd PMI value, the mode flexible combination that those skilled in the art can provide according to the embodiment of the present invention is used, below provide several concrete execution modes of determining channel information based on the frequency range division information:
In these several embodiments, all using the whole system bandwidth as a S set, and according to actual conditions, system bandwidth is divided into to P frequency range (BS, Bandwidth Segment), comprise in each frequency range on the basis of Q subband and to carry out the non-periodic feedback channel information.
This feedback of channel information is undertaken by mobile terminal usually, when needed, also can be calculated by equipment such as base stations.
Embodiment mono-,
Carrying out sub-band information while obtaining, first select a preferred frequency range, then select preferred subband in frequency range.
As shown in Figure 2, the method for this non-periodic feedback channel information specifically comprises:
The method of selecting PMI1, PMI2 and frequency range is combined in step S2031, employing, selects a preferred frequency range from P frequency range;
Step S2032, from Q subband of the preferred frequency range selected, select M preferably subband;
Step S2033, determine that one group of preferred PMI value corresponding to this M subband is as a PMI value.
Step S2034, according to a PMI value, determine the corresponding CQI value of selected subband;
Step S2035, suppose in communication process to adopt the full bandwidth transmission, calculate each frequency range corresponding preferred PMI value respectively, the P obtained is organized to the PMI value as the 2nd PMI value;
Step S2036, according to the 2nd PMI value, determine corresponding the 2nd CQI value of full bandwidth, when calculating the 2nd CQI value, suppose that the different frequency range of full bandwidth is used preferred PMI value corresponding to this frequency range, and then calculate the 2nd CQI value of corresponding full bandwidth;
The situation of 8 antenna configurations, 20MHz bandwidth of take is example, supposes that each frequency range is 5MHz, comprises altogether P=4 frequency range, if subband size k=4, selected subband number M=6, in this embodiment, the content of required feedback is as shown in table 4 so:
The content of the required feedback of scheme that table 4 embodiment mono-provides
Figure GSB0000114333020000121
In table 4, subband PMI1 is a PMI1, and subband PMI2 is a PMI2, and frequency range PMI1 is the 2nd PMI1, and frequency range PMI2 is the 2nd PMI2, and subband CQI is also a CQI, and broadband CQI i.e. the 2nd CQI, the corresponding CQI of each code word.
Certainly, in order to save feedback quantity, can sacrifice certain feedback accuracy, at this moment, step S2035 can adopt the another kind of frequency range based on divided, and obtains in the hypothesis communication process preferred PMI value while adopting the full bandwidth transmission mode as the 2nd PMI value, no longer feeds back P and organizes the PMI value:
Now, step S2035 is, supposes in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and this is organized to the PMI value as the 2nd PMI value.
Like this, while adopting the full bandwidth transmission in the hypothesis communication process, only need one group of PMI value of feedback to get final product as the 2nd PMI value, now the quantity of table 4 Mid Frequency PMI1 and frequency range PMI2 is 1, saved feedback quantity, but the granularity of frequency range PMI1 and frequency range PMI2 is increased to S.
Embodiment bis-,
Carry out sub-band information while obtaining, because embodiment mono-has relatively first determined a PMI1, so only need the selection of combining of PMI2 and subband while selecting subband, reducing computation complexity.
As shown in Figure 3, the method for this non-periodic feedback channel information specifically comprises:
The method of selecting PMI1, PMI2 and frequency range is combined in step S3031, employing, selects a preferred frequency range from P frequency range;
Step S3032, determine the preferred PMI1 value that this preferred frequency range is corresponding, and using this PMI1 value as a PMI1 value;
Step S3033, based on a PMI1 value, from Q subband of preferred frequency range, select preferably subband of M;
Step S3034, determine this M preferably the common one group of corresponding preferred PMI2 value of subband as a PMI2 value;
Step S3035, according to a PMI value, determine the corresponding CQI value of selected subband;
Step S3036, suppose in communication process to adopt the full bandwidth transmission, calculate each frequency range corresponding preferred PMI value respectively, the P obtained is organized to the PMI value as the 2nd PMI value;
Step S3037, according to the 2nd PMI value, determine corresponding the 2nd CQI value of full bandwidth, when calculating the 2nd CQI value, suppose that the different frequency range of full bandwidth is used preferred PMI value corresponding to this frequency range, and then calculate the 2nd CQI value of corresponding full bandwidth.
The situation of 8 antenna configurations, 20MHz bandwidth of take is example, supposes that each frequency range is 5MHz, comprises altogether P=4 frequency range, if subband size k=4, selected subband number M=6, in this embodiment, the content of required feedback is with table 4 so.
Certainly, in order to save feedback quantity, can sacrifice certain feedback accuracy, at this moment, step S3036 can adopt the another kind of frequency range based on divided, and obtains in the hypothesis communication process preferred PMI value while adopting the full bandwidth transmission mode as the 2nd PMI value, no longer feeds back P and organizes the PMI value:
Now, step S3036 is, supposes in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and this is organized to the PMI value as the 2nd PMI value.
Like this, while adopting the full bandwidth transmission in the hypothesis communication process, only need one group of PMI value of feedback to get final product as the 2nd PMI value, now in feedback content, the quantity of frequency range PMI1 and frequency range PMI2 is 1, has saved feedback quantity, but the granularity of frequency range PMI1 and frequency range PMI2 is increased to S.
Embodiment tri-,
At first select the preferred PMI1 of each frequency range, then adopt and combine the method for selecting PMI2 and subband, select several subbands in the full bandwidth scope, then complete the subband feedback
As shown in Figure 4, the method for this non-periodic feedback channel information specifically comprises:
The method of selecting PMI1 and frequency range is combined in step S4031, employing, selects the preferred PMI1 value of each frequency range as a PMI1 value;
Step S4032, based on a PMI1 value, adopt and to combine the method for selecting the subband in PMI2 and system bandwidth, select M preferably subband in the whole system bandwidth;
Step S4033, the common corresponding preferred PMI2 value of definite M subband of selecting are as a PMI2 value;
Step S4034, according to a PMI value, determine the corresponding CQI value of selected subband;
Step S4035, suppose in communication process to adopt the full bandwidth transmission, calculate each frequency range corresponding preferred PM1 value and the combination of PMI2 value respectively, the P obtained is organized to the PMI value as the 2nd PMI value;
Step S4036, according to the 2nd PMI value, determine corresponding the 2nd CQI value of full bandwidth, when calculating the 2nd CQI value, suppose that the different frequency range of full bandwidth is used preferred PMI value corresponding to this frequency range, and then calculate the 2nd CQI value of corresponding full bandwidth.
Certainly, in order to save feedback quantity, step S4035 also can adopt the another kind of frequency range based on divided, obtain in the hypothesis communication process preferred PMI value while adopting the full bandwidth transmission mode as the 2nd PMI value, no longer feed back P and organize the PMI value,, step S4035 is, suppose in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and using this group PMI value as the 2nd PMI value.
Further, when calculating the 2nd PMI value, can also utilize the preferred PMI1 value of resulting each frequency range in step S4021, thereby, when not affecting feedback accuracy, reduce amount of calculation and feedback quantity, concrete, step S4035 is specially:
P the PMI1 value of usining in a PMI1 value be as the 2nd PMI1 value, calculates each frequency range corresponding preferred PMI2 value respectively, and the P obtained is organized to the PMI2 value as the 2nd PMI2 value.
When feedback, can only the 2nd PMI2 value be fed back as the 2nd PMI value, to save feedback quantity.
The situation of 8 antenna configurations, 20MHz bandwidth of take is example, supposes that each frequency range is 5MHz, comprises altogether P=4 frequency range, if subband size k=4, selected subband number M=6, in this embodiment, the content of required feedback is as shown in table 5 so:
The content of the required feedback of scheme that table 5 embodiment tri-provides
Figure GSB0000114333020000151
In table 5, frequency range PMI1 is a PMI1 and the 2nd PMI1, and subband PMI2 is a PMI2, and frequency range PMI2 is the 2nd PMI2, and subband CQI is also a CQI, and broadband CQI i.e. the 2nd CQI, the corresponding CQI of each code word.
Embodiment tetra-,
At first adopt and combine the method for selecting PMI1, PMI2 and subband, select several subbands in the full bandwidth scope, then complete the subband feedback.
As shown in Figure 5, the method for this non-periodic feedback channel information specifically comprises:
The method of selecting PMI1, PMI2 and frequency range is combined in step S5031, employing, selects M preferably subband in the whole system bandwidth;
Step S5032, the common one group of corresponding preferred PMI value of definite M subband of selecting are as a PMI value;
Step S5033, according to a PMI value, determine the corresponding CQI value of selected subband;
Step S5034, suppose in communication process to adopt the full bandwidth transmission, calculate each frequency range corresponding preferred PMI1 value and the combination of PMI2 value respectively, the P obtained is organized to the PMI value as the 2nd PMI value;
Step S5035, according to the 2nd PMI value, determine corresponding the 2nd CQI value of full bandwidth, when calculating the 2nd CQI value, suppose that the different frequency range of full bandwidth is used preferred PMI value corresponding to this frequency range, and then calculate the 2nd CQI value of corresponding full bandwidth.
The situation of 8 antenna configurations, 20MHz bandwidth of take is example, supposes that each frequency range is 5MHz, comprises altogether P=4 frequency range, if subband size k=4, selected subband number M=6, in this embodiment, the content of required feedback is as shown in table 6 so:
The content of the required feedback of scheme that table 6 embodiment tetra-provides
Figure GSB0000114333020000171
In table 6, subband PMI1 is a PMI1, and subband PMI2 is a PMI2, and frequency range PMI1 is the 2nd PMI1, and frequency range PMI2 is the 2nd PMI2, and subband CQI is also a CQI, and broadband CQI i.e. the 2nd CQI, the corresponding CQI of each code word.
Embodiment five,
Feedback of channel information while carrying out in frequency range feedback and hypothesis communication process adopting the full bandwidth transmission.
As shown in Figure 6, the method for this non-periodic feedback channel information specifically comprises:
Step S6031, according to divided Frequency Band Selection, go out a preferred frequency range;
Step S6032, determine that preferred PMI value corresponding to preferred frequency range is as a PMI value;
Step S6033, according to a PMI value, determine the corresponding CQI value of selected frequency range;
Step S6034, suppose in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and this is organized to the PMI value as the 2nd PMI value;
Step S6035, according to the 2nd PMI value, determine corresponding the 2nd CQI value of full bandwidth, when calculating the 2nd CQI value, suppose that the different frequency range of full bandwidth is used preferred PMI value corresponding to this frequency range, and then calculate the 2nd CQI value of corresponding full bandwidth.
The situation of 8 antenna configurations, 20MHz bandwidth of take is example, supposes that each frequency range is 5M, comprises altogether P=4 frequency range, if subband size k=4, selected subband number M=6, in this embodiment, the content of required feedback is as shown in table 7 so:
The content of the required feedback of scheme that table 7 embodiment five provides
Figure GSB0000114333020000172
Figure GSB0000114333020000181
In table 7, frequency range PMI1 is a PMI1, and frequency range PMI2 is a PMI2, and overall with band PMI1 is the 2nd PMI1, and overall with band PMI2 is the 2nd PMI2, and frequency range CQI is also a CQI, and broadband CQI i.e. the 2nd CQI, the corresponding CQI of each code word.
The embodiment of the present invention also map network side provides a kind of method of non-periodic feedback channel information, as shown in Figure 7, comprising:
Step S701, to end side, send the frequency range division information, the frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, and P is at least 1;
Step S702, the control signal to the end side transmission for triggering terminal side feedback channel information;
Step S703, receiving terminal side group are in the channel information of frequency range division information and system bandwidth feedback.
In step S703, the channel information of end side based on frequency range division information feedback specifically comprises:
The index of the data fluxion RI value that can support to network side feeding back downlink link, selected preferred frequency range or selected subband, a PMI value, a CQI value and the 2nd PMI value, the 2nd CQI value, it determines that method is:
Based on frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the label PMI value of the common corresponding pre-coding matrix that meets predefined rule of M subband as a PMI value, and according to definite corresponding the first channel quality CQI value of selected subband of a PMI value; Perhaps based on the frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to preferred frequency range is as a PMI value, and determine corresponding the first channel quality CQI value of selected frequency range according to a PMI value;
Based on frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of the 2nd PMI value.
End side determines that the concrete grammar of channel information is identical with above-mentioned several specific embodiments, at this, no longer repeats.
The embodiment of the present invention is the corresponding system that a kind of non-periodic feedback channel information is provided also, and as shown in Figure 8, system comprises the network equipment 801 and terminal equipment 802, wherein:
The network equipment 801, for sending the frequency range division information and for the control signal of triggering terminal side feedback channel information, and receive the channel information of feedback, and the frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, and P is at least 1;
Terminal equipment 802, the frequency range division information and the control signal that for receiving the network equipment 801, send, and determine channel information based on frequency range division information and system bandwidth, and to network equipment feedback channel information.
Wherein, terminal equipment 802 specifically comprises:
Receiving element 8021, the frequency range division information and the control signal that for receiving the network equipment 801, send;
Processing unit 8022, for determining channel information based on frequency range division information and system bandwidth;
Feedback unit 8023, for to network equipment feedback channel information.
Processing unit 8022 determines that based on frequency range division information and system bandwidth the concrete grammar of channel information is:
Based on frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the label PMI value of the common corresponding pre-coding matrix that meets predefined rule of M subband as a PMI value, and according to definite corresponding the first channel quality CQI value of selected subband of a PMI value; Perhaps based on the frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to preferred frequency range is as a PMI value, and determine corresponding the first channel quality CQI value of selected frequency range according to a PMI value;
Based on frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of the 2nd PMI value.
It determines that the concrete grammar of channel information is identical with several specific embodiments of middle record above, no longer repeats at this.
The embodiment of the present invention is the corresponding terminal equipment that a kind of non-periodic feedback channel information is provided also, as shown in Figure 9, comprises receiving element 901, processing unit 902 and feedback unit 903, wherein:
Receiving element 901, for receiving frequency range division information that the network equipment sends and, for the control signal of triggering terminal side feedback channel information, the frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, P is at least 1;
Processing unit 902, for determining channel information based on frequency range division information and system bandwidth;
Feedback unit 903, for to network equipment feedback channel information.
Wherein, processing unit 902 further comprises: subband is chosen subelement 9021, a CQI value determines that subelement 9022, whole frequency range PMI determine subelement 9023 and the definite subelement 9024 of the 2nd CQI value, wherein:
Subband is chosen subelement 9021, be used for based on frequency range division information and system bandwidth, select preferably subband of M in system bandwidth, and in definite system bandwidth the label PMI value of the pre-coding matrix that meets predefined rule of M the common correspondence of subband as a PMI value; Perhaps frequency range is chosen subelement, for select a preferred frequency range based on the frequency range division information, and determines that preferred PMI value corresponding to preferred frequency range is as a PMI value;
The one CQI value is determined subelement 9022, for choose subelement or frequency range according to subband, chooses definite corresponding the first channel quality CQI value of selected subband of a PMI value that subelement is determined;
Whole frequency range PMI determines subelement 9023, for based on frequency range division information and system bandwidth, obtains in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value;
The 2nd CQI value is determined subelement 9024, for determine the 2nd PMI value that subelement is determined according to whole frequency range PMI, determines corresponding the 2nd CQI value of full bandwidth.
Now, feedback unit 903 is specifically for index, a PMI value, a CQI value, the 2nd PMI value and the 2nd CQI value of data fluxion RI value, selected preferred frequency range or selected subband that the feeding back downlink link can be supported.
For further realizing the accurate feedback channel information, and be applicable to LTE Rel-10, subband is chosen subelement 9021 or frequency range and is chosen the PMI value that subelement determines and comprise, for characterizing a PMI1 value of the long time/broadband character of channel, and for characterize channel in short-term/a PMI2 value of frequency selective characteristic; Whole frequency range PMI determines that the 2nd PMI values that subelement 9023 is determined comprise, grows the 2nd PMI1 value of time/broadband character for characterizing channel, and for characterize channel in short-term/the 2nd PMI2 value of frequency selective characteristic.
According to the above-mentioned embodiment exemplified, subband choose subelement 9021 specifically for:
The method of selecting PMI1, PMI2 and frequency range is combined in employing, selects a preferred frequency range the P divided from a system bandwidth frequency range; From Q subband of preferred frequency range, select M preferably subband, and the common corresponding preferred PMI1 value of definite M subband and the combination of PMI2 value, and using the PMI1 value in preferred compositions as a PMI1 value, using the PMI2 value in preferred compositions as the 2nd PMI2 value, the number of sub-bands that Q comprises for each frequency range, Q is not less than as the predefined number of sub-bands M that should report of system bandwidth; Perhaps
The method of selecting PMI1, PMI2 and frequency range is combined in employing, selects a preferred frequency range the P divided from a system bandwidth frequency range, and determines preferred PMI1 value corresponding to preferred frequency range, and using this preferred PMI1 value as a PMI1 value; Based on a PMI1 value, from Q subband of preferred frequency range, select M preferably subband, and the common corresponding preferred PMI2 value of definite M subband is as a PMI2 value, the number of sub-bands that Q comprises for each frequency range, Q is not less than as the predefined number of sub-bands M that should report of system bandwidth; Perhaps
The method of selecting PMI1 and frequency range is combined in employing, selects P preferred PMI1 value of respectively corresponding each frequency range as a PMI1 value; Based on a PMI1 value, adopt and combine the method for selecting the subband in PMI2 and system bandwidth, select M preferably subband in the whole system bandwidth, and the common corresponding preferred PMI2 value of definite M subband is as a PMI2 value.
Whole frequency range PMI determines subelement 9023, specifically for:
Suppose in communication process to adopt the full bandwidth transmission, calculate preferred PMI1 value corresponding to each frequency range difference and the combination of PMI2 value, the P obtained is organized to the PMI value as the 2nd PMI value; Perhaps
Suppose in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and using this group PMI value as the 2nd PMI value.
For above-described embodiment four, subband is chosen subelement 9021, specifically for:
The method of selecting the subband in PMI1, PMI2 and system bandwidth is combined in employing, select M preferably subband in the whole system bandwidth, and the common corresponding preferred PMI1 value of definite M subband and the combination of PMI2 value, and using the PMI1 value in preferred compositions as a PMI1 value, using the PMI2 value in preferred compositions as the 2nd PMI2 value;
Whole frequency range PMI determines subelement 9023, specifically for:
Suppose in communication process to adopt the full bandwidth transmission, calculate preferred PMI1 value corresponding to each frequency range difference and the combination of PMI2 value, the P obtained is organized to the PMI value as the 2nd PMI value.
Corresponding embodiment tri-, choose subelement 9021 when subband and combine the method for selecting PMI1 and frequency range specifically for employing, selects the individual preferably PMI1 value of P of respectively corresponding each frequency range as a PMI1 value; Based on a PMI1 value, the method of selecting the subband in PMI2 and system bandwidth is combined in employing, selects M preferably subband in the whole system bandwidth, and the preferred PMI2 value of the common correspondence of definite M subband is during as a PMI2 value, whole frequency range PMI determines subelement 9023, specifically for:
P the PMI1 value of usining in a PMI1 value be as the 2nd PMI1 value, based on the 2nd PMI1 value, calculates each frequency range corresponding preferred PMI2 value respectively, and the P obtained is organized to the PMI2 value as the 2nd PMI2 value.
At this moment, feedback unit 903 is specifically for index, a PMI value, a CQI value, the 2nd PMI2 value and the 2nd CQI value of data fluxion RI value, selected preferred frequency range or selected subband that the feeding back downlink link can be supported.
Corresponding embodiment five, when terminal equipment comprises that frequency range is chosen subelement, whole frequency range PMI determines subelement 9023, specifically for:
Suppose in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and using this group PMI value as the 2nd PMI value.
The embodiment of the present invention is the corresponding network equipment that a kind of non-periodic feedback channel information is provided also, as shown in figure 10, comprising: frequency range division unit 1001, frequency range division information transmitting element 1002, trigger element 1003 and receiving element 1004, wherein:
Frequency range division unit 1001, for the situation according to system bandwidth and antenna calibration, be divided into P frequency range by system bandwidth, and P is at least 1, and each frequency range comprises Q subband, and Q is not less than as the predefined number of sub-bands M that should feed back of system bandwidth;
Frequency range division information transmitting element 1002, for the frequency range division result according to frequency range division unit 1001, send the frequency range division information to end side, and the frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into;
Trigger element 1003, for sending the control signal for triggering terminal side feedback channel information to end side;
Receiving element 1004, the channel information for the receiving terminal lateral root according to frequency range division information and system bandwidth feedback.
End side according to frequency range division information and system bandwidth, determine and the method for feedback channel information with above described in identical, just no longer repetition herein.
The embodiment of the present invention provides a kind of method, system, terminal equipment and network equipment of feedback channel information, by by the network equipment, system bandwidth being divided into to P frequency range, terminal equipment is according to the frequency range of dividing, determine channel information, because the calculating of channel information is based on the frequency range after division, thereby improve the feedback accuracy of channel information, a kind of system, terminal equipment and the network equipment of non-periodic feedback channel information also are provided simultaneously, to realize according to the frequency range of dividing, determine channel information feedback.
And the PMI value of feeding back in the embodiment of the present invention all comprises for characterizing the PMI1 value of the long time/broadband character of channel, and for characterize channel in short-term/the PMI2 value of frequency selective characteristic, thereby the feedback of realization couple PMI is applicable to the application of LTE Rel-10.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.

Claims (19)

1. the method for a feedback channel information, is characterized in that, comprising:
Receive the frequency range division information that network side sends, described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, and described P is at least 1;
Receive the control signal for triggering terminal side feedback channel information that network side sends;
Based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the label PMI value of the common corresponding pre-coding matrix that meets predefined rule of M subband as a PMI value, and according to definite corresponding the first channel quality indicator (CQI) value of selected subband of a PMI value; Perhaps based on described frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to described preferred frequency range is as a PMI value, and determine the corresponding CQI value of selected frequency range according to a PMI value;
Based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of described the 2nd PMI value;
The index of the data fluxion RI value that can support to network side feeding back downlink link, selected preferred frequency range or selected subband, a described PMI value, a CQI value and the 2nd PMI value, the 2nd CQI value.
2. the method for claim 1, is characterized in that, a described PMI value comprises for characterizing a PMI1 value of the long time/broadband character of channel, and for characterize channel in short-term/a PMI2 value of frequency selective characteristic;
Described the 2nd PMI value comprises for characterizing the 2nd PMI1 value of the long time/broadband character of channel, and for characterize channel in short-term/the 2nd PMI2 value of frequency selective characteristic.
3. method as claimed in claim 2, it is characterized in that, described based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth, the label PMI value of the common corresponding pre-coding matrix that meets predefined rule of M subband, as a PMI value, specifically comprises:
The method of selecting PMI1, PMI2 and frequency range is combined in employing, selects a preferred frequency range the P divided from a system bandwidth frequency range; From Q subband of described preferred frequency range, preferably go out M subband toward the second choice of opimization successively, and the common corresponding preferred PMI1 value of a definite described M subband and the combination of PMI2 value, and using the PMI1 value in described preferred compositions as a PMI1 value, using the PMI2 value in described preferred compositions as the 2nd PMI2 value, the number of sub-bands that described Q comprises for each frequency range, Q is not less than as the predefined number of sub-bands M that should report of described system bandwidth; Perhaps
The method of selecting PMI1, PMI2 and frequency range is combined in employing, selects a preferred frequency range the P divided from a system bandwidth frequency range, and determines preferred PMI1 value corresponding to described preferred frequency range, and using this preferred PMI1 value as a PMI1 value; Based on a described PMI1 value, from Q subband of described preferred frequency range, select M preferably subband, and determine that the common corresponding preferred PMI2 value of a described M subband is as a PMI2 value, the number of sub-bands that described Q comprises for each frequency range, Q is not less than as the predefined number of sub-bands M that should report of described system bandwidth; Perhaps
The method of selecting PMI1 and frequency range is combined in employing, selects P preferred PMI1 value of respectively corresponding each frequency range as a PMI1 value; Based on a described PMI1 value, adopt and combine the method for selecting the subband in PMI2 and system bandwidth, select M preferably subband in the whole system bandwidth, and determine that the common corresponding preferred PMI2 value of a described M subband is as a PMI2 value.
4. method as claimed in claim 3, is characterized in that, described based on described frequency range division information and system bandwidth, obtains in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, specifically comprises:
Suppose in communication process to adopt the full bandwidth transmission, calculate preferred PMI1 value corresponding to each frequency range difference and the combination of PMI2 value, the P obtained is organized to the PMI value as the 2nd PMI value; Perhaps
Suppose in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and using this group PMI value as the 2nd PMI value.
5. method as claimed in claim 2, it is characterized in that, described based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth, the label PMI value of the common corresponding pre-coding matrix that meets predefined rule of M subband, as a PMI value, is specially:
The method of selecting the subband in PMI1, PMI2 and system bandwidth is combined in employing, select M preferably subband in the whole system bandwidth, and the common corresponding preferred PMI1 value of a definite described M subband and the combination of PMI2 value, and using the PMI1 value in described preferred compositions as a PMI1 value, using the PMI2 value in described preferred compositions as the 2nd PMI2 value;
The described frequency range based on divided, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, is specially:
Suppose in communication process to adopt the full bandwidth transmission, calculate preferred PMI1 value corresponding to each frequency range difference and the combination of PMI2 value, the P obtained is organized to the PMI value as the 2nd PMI value.
6. method as claimed in claim 4, is characterized in that, when employing, combines the method for selecting PMI1 and frequency range, selects P preferred PMI1 value of respectively corresponding each frequency range as a PMI1 value; Based on a described PMI1 value, adopt and to combine the method for selecting the subband in PMI2 and system bandwidth, select M preferably subband in the whole system bandwidth, and the preferred PMI2 value of determining the common correspondence of a described M subband is during as a PMI2 value,
Described hypothesis base station adopts the full bandwidth transmission, calculates preferred PMI1 value corresponding to each frequency range difference and the combination of PMI2 value, and the P obtained is organized to the PMI value as the 2nd PMI value, specifically comprises:
P the PMI1 value of usining in a described PMI1 value be as the 2nd PMI1 value, based on described the 2nd PMI1 value, calculates each frequency range corresponding preferred PMI2 value respectively, and the P obtained is organized to the PMI2 value as the 2nd PMI2 value.
7. method as claimed in claim 6, is characterized in that, feeds back the 2nd PMI value and be specially described the 2nd PMI2 value of feedback.
8. method as claimed in claim 2, is characterized in that, when the Frequency Band Selection according to divided goes out a preferred frequency range, and while determining preferred PMI value corresponding to described preferred frequency range as a PMI value,
Described based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, be specially:
Suppose in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and using this group PMI value as the 2nd PMI value.
9. the method for a feedback channel information, is characterized in that, comprising:
Send the frequency range division information to end side, described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, and described P is at least 1;
Send the control signal for triggering terminal side feedback channel information to end side;
The receiving terminal side group is in the channel information of described frequency range division information and system bandwidth feedback;
The channel information of described end side based on described frequency range division information and system bandwidth feedback specifically comprises:
The index of data fluxion RI value, selected preferred frequency range or selected subband that down link can be supported, label PMI value, the first channel quality indicator (CQI) value and the 2nd PMI value of the first pre-coding matrix, the 2nd CQI value, it determines that method is:
Based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the common corresponding PMI value that meets predefined rule of M subband as a PMI value, and according to the definite corresponding CQI value of selected subband of a PMI value; Perhaps based on described frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to described preferred frequency range is as a PMI value, and determine corresponding the first channel quality CQI value of selected frequency range according to a PMI value;
Based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of described the 2nd PMI value.
10. the system of a feedback channel information, is characterized in that, comprising:
The network equipment, for sending the frequency range division information and for the control signal of triggering terminal side feedback channel information, and receive the channel information of feedback, and described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, and described P is at least 1;
Terminal equipment, the frequency range division information and the control signal that for receiving the described network equipment, send, and determine channel information based on described frequency range division information and system bandwidth, and feed back described channel information to the described network equipment;
Described terminal equipment specifically comprises:
Receiving element, the frequency range division information and the control signal that for receiving the described network equipment, send;
Processing unit, be used for based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the label PMI value of the common corresponding pre-coding matrix that meets predefined rule of M subband as a PMI value, and according to definite corresponding the first channel quality CQI value of selected subband of a PMI value; Perhaps based on described frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to described preferred frequency range is as a PMI value, and determine the corresponding CQI value of selected frequency range according to a PMI value; Based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of described the 2nd PMI value;
Feedback unit, for the index of the data fluxion RI value that can support to network side feeding back downlink link, selected preferred frequency range or selected subband, a described PMI value, a CQI value and the 2nd PMI value, the 2nd CQI value.
11. the terminal equipment of a feedback channel information, is characterized in that, comprising:
Receiving element, for receiving frequency range division information that the network equipment sends and, for the control signal of triggering terminal side feedback channel information, described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into, described P is at least 1;
Processing unit, for determining channel information based on described frequency range division information and system bandwidth;
Feedback unit, for feeding back described channel information to the described network equipment;
Described processing unit specifically comprises:
Subband is chosen subelement, be used for based on described frequency range division information and system bandwidth, select preferably subband of M in system bandwidth, and in definite system bandwidth the label PMI value of the pre-coding matrix that meets predefined rule of M the common correspondence of subband as a PMI value; Perhaps frequency range is chosen subelement, for based on described frequency range division information, selecting a preferred frequency range, and determines that preferred PMI value corresponding to described preferred frequency range is as a PMI value;
The one CQI value is determined subelement, for choose subelement or frequency range according to described subband, chooses definite corresponding the first channel quality CQI value of selected subband of a PMI value that subelement is determined;
Whole frequency range PMI determines subelement, for based on described frequency range division information and system bandwidth, obtains in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value;
The 2nd CQI value is determined subelement, for determine the 2nd PMI value that subelement is determined according to described whole frequency range PMI, determines corresponding the 2nd CQI value of full bandwidth;
Described feedback unit specifically for:
Index, a PMI value, a CQI value, the 2nd PMI value and the 2nd CQI value of data fluxion RI value, selected preferred frequency range or selected subband that the feeding back downlink link can be supported.
12. terminal equipment as claimed in claim 11, it is characterized in that, described subband is chosen subelement or described frequency range and is chosen the PMI value that subelement determines and comprise, for characterizing a PMI1 value of the long time/broadband character of channel, and for characterize channel in short-term/a PMI2 value of frequency selective characteristic;
Described whole frequency range PMI determines that the 2nd PMI value that subelement is determined comprises, grows the 2nd PMI1 value of time/broadband character for characterizing channel, and for characterize channel in short-term/the 2nd PMI2 value of frequency selective characteristic.
13. terminal equipment as claimed in claim 12, is characterized in that, described subband is chosen subelement, specifically for:
The method of selecting PMI1, PMI2 and frequency range is combined in employing, selects a preferred frequency range the P divided from a system bandwidth frequency range; From Q subband of described preferred frequency range, select M preferably subband, and the common corresponding preferred PMI1 value of a definite described M subband and the combination of PMI2 value, and using the PMI1 value in described preferred compositions as a PMI1 value, using the PMI2 value in described preferred compositions as the 2nd PMI2 value, the number of sub-bands that described Q comprises for each frequency range, Q is not less than as the predefined number of sub-bands M that should report of described system bandwidth; Perhaps
The method of selecting PMI1, PMI2 and frequency range is combined in employing, selects a preferred frequency range the P divided from a system bandwidth frequency range, and determines preferred PMI1 value corresponding to described preferred frequency range, and using this preferred PMI1 value as a PMI1 value; Based on a described PMI1 value, from Q subband of described preferred frequency range, select M preferably subband, and determine that the common corresponding preferred PMI2 value of a described M subband is as a PMI2 value, the number of sub-bands that described Q comprises for each frequency range, Q is not less than as the predefined number of sub-bands M that should report of described system bandwidth; Perhaps
The method of selecting PMI1 and frequency range is combined in employing, selects P preferred PMI1 value of respectively corresponding each frequency range as a PMI1 value; Based on a described PMI1 value, adopt and combine the method for selecting the subband in PMI2 and system bandwidth, select M preferably subband in the whole system bandwidth, and determine that the common corresponding preferred PMI2 value of a described M subband is as a PMI2 value.
14. terminal equipment as claimed in claim 13, is characterized in that, described whole frequency range PMI determines subelement, specifically for:
Suppose in communication process to adopt the full bandwidth transmission, calculate preferred PMI1 value corresponding to each frequency range difference and the combination of PMI2 value, the P obtained is organized to the PMI value as the 2nd PMI value; Perhaps
Suppose in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and using this group PMI value as the 2nd PMI value.
15. terminal equipment as claimed in claim 12, is characterized in that, described subband is chosen subelement, specifically for:
The method of selecting the subband in PMI1, PMI2 and system bandwidth is combined in employing, select M preferably subband in the whole system bandwidth, and the common corresponding preferred PMI1 value of a definite described M subband and the combination of PMI2 value, and using the PMI1 value in described preferred compositions as a PMI1 value, using the PMI2 value in described preferred compositions as the 2nd PMI2 value;
Described whole frequency range PMI determines subelement, specifically for:
Suppose in communication process to adopt the full bandwidth transmission, calculate preferred PMI1 value corresponding to each frequency range difference and the combination of PMI2 value, the P obtained is organized to the PMI value as the 2nd PMI value.
16. terminal equipment as claimed in claim 14, is characterized in that, chooses subelement when described subband and combine the method for selecting PMI1 and frequency range specifically for employing, selects P preferred PMI1 value of respectively corresponding each frequency range as a PMI1 value; Based on a described PMI1 value, adopt and to combine the method for selecting the subband in PMI2 and system bandwidth, select M preferably subband in the whole system bandwidth, and the preferred PMI2 value of determining the common correspondence of a described M subband is during as a PMI2 value,
Described whole frequency range PMI determines subelement, specifically for:
P the PMI1 value of usining in a described PMI1 value be as the 2nd PMI1 value, based on described the 2nd PMI1 value, calculates each frequency range corresponding preferred PMI2 value respectively, and the P obtained is organized to the PMI2 value as the 2nd PMI2 value.
17. terminal equipment as claimed in claim 16, it is characterized in that, described feedback unit is specifically for index, a PMI value, a CQI value, the 2nd PMI2 value and the 2nd CQI value of data fluxion RI value, selected preferred frequency range or selected subband that the feeding back downlink link can be supported.
18. terminal equipment as claimed in claim 12, is characterized in that, when described terminal equipment comprises that frequency range is chosen subelement, described whole frequency range PMI determines subelement, specifically for:
Suppose in communication process to adopt the full bandwidth transmission, the combination of calculating the corresponding preferred PMI1 value of whole system bandwidth and PMI2 value, and using this group PMI value as the 2nd PMI value.
19. the network equipment of a feedback channel information, is characterized in that, comprising:
The frequency range division unit, for the situation according to system bandwidth and antenna calibration, be divided into P frequency range by system bandwidth, and described P is at least 1, and each frequency range comprises Q subband, and Q is not less than as the predefined number of sub-bands M that should feed back of system bandwidth;
Frequency range division information transmitting element, for the frequency range division result according to described frequency range division unit, send the frequency range division information to end side, and described frequency range division information comprises: the number of frequency bands P that system bandwidth is divided into;
Trigger element, for sending the control signal for triggering terminal side feedback channel information to end side;
Receiving element, the channel information for the receiving terminal lateral root according to described frequency range division information and system bandwidth feedback, wherein, the channel information of described end side based on described frequency range division information and system bandwidth feedback specifically comprises:
The index of data fluxion RI value, selected preferred frequency range or selected subband that down link can be supported, label PMI value, the first channel quality indicator (CQI) value and the 2nd PMI value of the first pre-coding matrix, the 2nd CQI value, it determines that method is:
Based on described frequency range division information and system bandwidth, select M preferably subband in system bandwidth, and in definite system bandwidth the common corresponding PMI value that meets predefined rule of M subband as a PMI value, and according to the definite corresponding CQI value of selected subband of a PMI value; Perhaps based on described frequency range division information, select a preferred frequency range, and determine that preferred PMI value corresponding to described preferred frequency range is as a PMI value, and determine corresponding the first channel quality CQI value of selected frequency range according to a PMI value;
Based on described frequency range division information and system bandwidth, obtain in the hypothesis communication process PMI value that meets predefined rule while adopting the full bandwidth transmission as the 2nd PMI value, and according to definite corresponding the 2nd CQI value of full bandwidth of described the 2nd PMI value.
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