CN102055547B - Method and equipment for acquiring channel state information - Google Patents

Method and equipment for acquiring channel state information Download PDF

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Publication number
CN102055547B
CN102055547B CN200910109937.1A CN200910109937A CN102055547B CN 102055547 B CN102055547 B CN 102055547B CN 200910109937 A CN200910109937 A CN 200910109937A CN 102055547 B CN102055547 B CN 102055547B
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signal
noise ratio
plus noise
interference plus
subband
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CN102055547A (en
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张兴炜
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2010/077673 priority patent/WO2011050674A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/0029—Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a method and equipment for acquiring channel state information. The method comprises the following steps of: acquiring a channel quality indicators (CQI) of N sub-bands; acquiring a signal-to-interference-and-noise ratio of a sub-band corresponding to a CQI of the sub-band according to a corresponding relationship between the CQI and the signal-to-interference-and-noise ratio, wherein N is an integer of more than or equal to 2; obtaining a signal-to-interference-and-noise ratio of a wideband by utilizing the signal-to-interference-and-noise ratios of the N sub-bands, wherein the wideband consists of N sub-bands; and acquiring a CQI of the wideband corresponding to the signal-to-interference-and-noise ratio of the wideband according to the corresponding relationship between the CQI and the signal-to-interference-and-noise ratio. Due to the method, a channel information feedback party is not needed to feed back the CQI of all frequency bands, and the overhead can be saved in the process of feeding back the channel state information.

Description

Obtain the method and apparatus of channel condition information
Technical field
The present invention relates to the communications field, relate in particular to a kind of method and apparatus that obtains channel condition information.
Background technology
LTE(Long Term Evolution, Long Term Evolution) technology adopts OFDM(Orthogonal Frequency Division Multiplexing, OFDM) substituted the long-term CDMA(Code Division Multiple Access using of 3GPP, code division multiple access) as multiple access technology, and adopt in a large number MIMO(Multiple-Input Multiple-Out-put, multiple-input and multiple-output) technology and adaptive technique improve data transfer rate and systematic function, under 20MHz spectral bandwidth, can provide DL(Downlink, descending) 100Mbit/s and UL(Uplink, up) peak rate of 50Mbit/s, improved the performance of Cell Edge User, improve cell capacity and reduce system delay.
LTE-A(LTE-Advance, the evolution of LTE) be the further enhancing of LTE technology, LTE-A system has the bandwidth requirement higher than LTE system.In LTE-A system, UE(User Equipment, subscriber equipment) need to be to some channel condition informations of system feedback, eNB(eNodeB, base station) according to the feedback channel receiving, determine descending used MCS(Modulation and Coding Scheme, modulation coding mode).The uplink feedback pattern of UE specifically has following three kinds:
1, direct channels status information feedback
The channel matrix H that UE directly estimates to eNB feedback or some conversion based on H, as the covariance matrix of H, carry out SVD(Singular Value Decomposition, singular value decomposition to H) matrix that obtains afterwards etc.
2, the information feedback based on SRS
At TDD(Time Division Duplex, time division multiplexing) under pattern, UE sends SRS(Sounding Reference Signal, interception reference signal) signal, eNB utilizes the up-downgoing channel relevancy of TDD system to go out CSI(Channel State Information, channel condition information by SRS Signal estimation).
3, indirect information feedback
The information of information feedback comprises CQI(Channel Quality Indicator indirectly, channel quality indication), PMI(Precoding Matrix Indicator, pre-coding matrix is indicated) and RI(Rank Indicator, order indication) etc., eNB can utilize these channel conditions to determine that descending MIMO processes after receiving these information better, as transmit diversity, wave beam forming, space division multiplexing etc.
In LTE-A system, UE is according to the DL(Downlink of the eNB receiving, descending) information estimator goes out SINR(Signal-to-Interference-and-Noise Ratio, Signal Interference and Noise Ratio, be called for short Signal to Interference plus Noise Ratio), according to SINR, calculate CQI, then at UL(Uplink, up) CQI value is fed back to eNB in communication, eNB is used this information to serve better next time DL and communicates by letter.Described SINR is the analogue value, and CQI is the sequence number value of the new layout of laying equal stress on after quantizing, and quantization step is 1.892dB, i.e. the every increase of SINR 1.892dB, and CQI increases by one grade.
With the example that is fed back to of CQI, in order to reflect that UE receives the situation of signal, UE need to report the wideband CQI(broadband CQI that shows whole bandwidth of operation upper signal channel situation to system); Meanwhile, in order to give eNodeB(base station) reference information of scheduling is provided, under some pattern, UE also needs to report Subband CQI(subband CQI to system), and then can analyze the channel situation in some local bandwidth.When the CQI of whole subbands need to be reported to system, the mode that reports is now called full subband feedback scheme.Full feedback scheme is for first feeding back a broadband CQI information, then feeds back the CQI information of all subbands, can obtain the most all sidedly channel conditions like this, but feedback overhead is also larger.In existing protocol, subband CQI feedback is adopted the method for differential feedback, all subband CQI only feed back the difference of itself and broadband CQI.
In existing protocol, feeding back a CQI value needs 4bits, 15 kinds of CQI index(index of CQI value representation of 4bits), as shown in table 1 below, in table 1, expressed every kind of corresponding modulation system of CQI index, code check and efficiency.
Table 1
Figure GDA0000439392220000021
Feedback differential value needs 2bits, is divided into four shelves, as shown in table 2 below, the side-play amount that every seed belt differential CQI value is corresponding certain.
Table 2
Subband differential CQI value Side-play amount
00 0
01 1
10 ≥2
11 ≤-1
If needing the sub band number of feedback is N, prior art feedback overhead is 4+2N, first feeds back the broadband CQI value of a 4bits, then feeds back the difference value of each subband CQI and broadband CQI, each 2bits.
Inventor finds that prior art at least exists following problem: although the feedback of channel information scheme of prior art has adopted the method for differential feedback, reduced certain interface-free resources expense, but the expense (overhead) of feedback is still larger, take more bandwidth and channel resource, how in the situation that more economizing on resources, obtaining channel condition information just becomes a problem.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus that obtains channel condition information, the expense when reducing information feedback.
According to one embodiment of the invention, a kind of method of obtaining channel condition information is provided, comprising:
Obtain the channel quality indication of N subband;
According to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio of this subband corresponding with the channel quality indication of each subband, comprising:
According to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this subband corresponding with the channel quality indication of each subband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of this subband on precalculated position is as the Signal to Interference plus Noise Ratio of this subband, wherein, in described Signal to Interference plus Noise Ratio interval, precalculated position comprises coboundary, lower boundary or the median in this Signal to Interference plus Noise Ratio interval;
Wherein N is more than or equal to 2 integer;
Utilize the Signal to Interference plus Noise Ratio of a described N subband to obtain the Signal to Interference plus Noise Ratio in broadband, described broadband consists of a described N subband;
According to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication in this broadband corresponding with the Signal to Interference plus Noise Ratio in described broadband.
According to still another embodiment of the invention, provide a kind of method of obtaining channel condition information, comprising:
Obtain the channel quality indication in broadband and the channel quality indication of N-1 the 3rd subband, wherein said broadband consists of N subband, and a described N subband comprises N-1 the 3rd subband and 1 the 4th subband, and wherein N is more than or equal to 2 integer;
According to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio in this broadband corresponding with the channel quality indication in described broadband and indicate the Signal to Interference plus Noise Ratio of the 3rd corresponding subband with the channel quality of each the 3rd subband;
Wherein, described according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband comprises: according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of the 3rd subband on precalculated position is as the Signal to Interference plus Noise Ratio of the 3rd subband, wherein, in described Signal to Interference plus Noise Ratio interval, precalculated position comprises the coboundary in this Signal to Interference plus Noise Ratio interval, lower boundary or median,
Utilize the Signal to Interference plus Noise Ratio in described broadband and the Signal to Interference plus Noise Ratio of N-1 the 3rd subband to obtain the Signal to Interference plus Noise Ratio of the 4th subband;
According to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication of four subband corresponding with the Signal to Interference plus Noise Ratio of described the 4th subband.
According to still another embodiment of the invention, provide a kind of equipment that obtains channel condition information, comprising:
The first acquiring unit, for obtaining the channel quality indication of N subband;
The first corresponding unit, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio of this subband corresponding with the channel quality indication of each subband, wherein N is more than or equal to 2 integer, described the first corresponding unit comprises: the first respective modules, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this subband corresponding with the channel quality indication of each subband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of this subband on precalculated position is as the Signal to Interference plus Noise Ratio of this subband, wherein, in described Signal to Interference plus Noise Ratio interval, precalculated position comprises the coboundary in this Signal to Interference plus Noise Ratio interval, lower boundary or median,
First solves unit, and for utilizing the Signal to Interference plus Noise Ratio of a described N subband to obtain the Signal to Interference plus Noise Ratio in broadband, described broadband consists of a described N subband;
The first output unit, for according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtains the channel quality indication in this broadband corresponding with the Signal to Interference plus Noise Ratio in described broadband.
According to still another embodiment of the invention, provide a kind of equipment that obtains channel condition information, comprising:
Second acquisition unit, for obtaining the channel quality indication in broadband and the channel quality indication of N-1 the 3rd subband, wherein said broadband consists of N subband, and a described N subband comprises N-1 the 3rd subband and 1 the 4th subband, and wherein N is more than or equal to 2 integer;
The second corresponding unit, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio in this broadband corresponding with the channel quality indication in described broadband, and the Signal to Interference plus Noise Ratio of three subband corresponding with the channel quality indication of each the 3rd subband, described the second corresponding unit comprises: the second respective modules, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of the 3rd subband on precalculated position is as the Signal to Interference plus Noise Ratio of the 3rd subband, wherein, in described Signal to Interference plus Noise Ratio interval, precalculated position comprises the coboundary in this Signal to Interference plus Noise Ratio interval, lower boundary or median,
Second solves unit, for utilizing the Signal to Interference plus Noise Ratio in described broadband and the Signal to Interference plus Noise Ratio of N-1 the 3rd subband to obtain the Signal to Interference plus Noise Ratio of the 4th subband;
The second output unit, for according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtains the channel quality indication of four subband corresponding with the Signal to Interference plus Noise Ratio of described the 4th subband.
According to still another embodiment of the invention, provide a kind of method of feeding back channel state information, comprising:
Obtain the channel quality indication of the 7th frequency band and the channel quality indication of N-1 the 8th frequency band, calculate the difference between the channel quality indication of each the 8th frequency band and the channel quality indication of the 7th frequency band, the differential channel quality of the 8th frequency band indication using each difference calculating as N-1 respectively, N is more than or equal to 2 integer;
Feed back the channel quality indication of described the 7th frequency band and the differential channel quality indication of described N-1 the 8th frequency band;
Wherein said the 7th frequency band is a broadband, comprises described N-1 the 8th frequency band and another subband, or described the 7th frequency band and described N-1 the 8th frequency band are all the subbands in other broadband.
According to still another embodiment of the invention, provide a kind of equipment of feeding back channel state information, comprising:
Information acquisition unit, for obtaining the channel quality indication of the 7th frequency band and the channel quality indication of N-1 the 8th frequency band, calculate the difference between the channel quality indication of each the 8th frequency band and the channel quality indication of the 7th frequency band, the differential channel quality of the 8th frequency band indication using each difference calculating as N-1 respectively, N is more than or equal to 2 integer;
Information feedback unit, for feeding back the channel quality indication of described the 7th frequency band and the differential channel quality indication of described N-1 the 8th frequency band;
Wherein, described the 7th frequency band is a broadband, comprises described N-1 the 8th frequency band and another subband, or described the 7th frequency band and described N-1 the 8th frequency band are all the subbands in other broadband.
According to the description to technique scheme, the embodiment of the present invention has the following advantages: the CQI that can obtain frequency band to be measured by the CQI of the existing frequency band that fed back, without feedback of channel information side, feed back the CQI of all frequency bands, required feedback overhead is less than the full feedback scheme of prior art, thereby can reduce the amount of information of air interface transmission, save channel resource.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing that need to use embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of schematic diagram that obtains the method for channel condition information that Fig. 1 provides for embodiments of the invention;
The schematic diagram of a kind of wideband structural that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 provide for embodiments of the invention another obtain the schematic diagram of the method for channel condition information;
The schematic diagram of a kind of uplink feedback pattern that Fig. 4 provides for the embodiment of the present invention;
The schematic diagram of another uplink feedback pattern that Fig. 5 provides for the embodiment of the present invention;
The schematic diagram of another uplink feedback pattern that Fig. 6 provides for the embodiment of the present invention;
The schematic diagram of another uplink feedback pattern that Fig. 7 provides for the embodiment of the present invention;
A kind of schematic diagram that obtains the equipment of channel condition information that Fig. 8 provides for embodiments of the invention;
Fig. 9 provide for embodiments of the invention another obtain the schematic diagram of the equipment of channel condition information;
The schematic diagram of the method for a kind of feeding back channel state information that Figure 10 provides for embodiments of the invention;
The schematic diagram of the equipment of a kind of feeding back channel state information that Figure 11 provides for embodiments of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In the method for obtaining channel condition information providing in the embodiment of the present invention, can when information feedback, feed back all subband CQI, certain corresponding relation that utilizes broadband CQI and subband CQI to exist, the mapping table that is calculated and searched SINR (dB) and CQI by formula, obtains broadband CQI; Or can feed back broadband CQI and most of subband CQI, then by formula, calculate and search the mapping table of SINR (dB) and CQI, obtain remaining subband CQI.By adopting the information feedback scheme and the scheme of obtaining channel condition information of the embodiment of the present invention, can effectively reduce the amount of information of air interface transmission, reduce uplink feedback expense, save the bandwidth resources of communication system.
A kind of schematic diagram that obtains the method for channel condition information that Fig. 1 provides for embodiments of the invention, the method comprises:
S11: the channel quality indication of obtaining N subband;
S12: according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio of this subband corresponding with the channel quality indication of each subband, wherein N is more than or equal to 2 integer;
S13: utilize the Signal to Interference plus Noise Ratio of a described N subband to obtain the Signal to Interference plus Noise Ratio in broadband, described broadband consists of a described N subband;
S14: according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication in this broadband corresponding with the Signal to Interference plus Noise Ratio in described broadband.
The present embodiment is obtained the Signal to Interference plus Noise Ratio of N subband by obtaining the channel quality indication of N subband, and the Signal to Interference plus Noise Ratio that utilizes N subband has obtained comprising the Signal to Interference plus Noise Ratio in the broadband of this N subband, thereby can access the channel quality indication in this broadband, the side that feedback channel quality is indicated only need to feed back the channel quality indication of N subband, without the channel quality indication in feedback broadband, the expense in the time of can reducing information feedback.The broadband that the embodiment of the present invention relates to can comprise a plurality of subbands, and broadband itself can be also the subband of other frequency band.The schematic diagram of a kind of wideband structural that Fig. 2 provides for the embodiment of the present invention, in Fig. 2, wideband A comprises 8 subbands, use respectively S1, S2 ..., S8 represents; Being appreciated that S1, S2, S3, S4 are combined also can regard a broadband B as, comprising S1, S2, S3, S4 totally 4 subbands; The rest may be inferred, and the combination of the combination of S1 and S2 or S7 and S8 can be to regard the broadband that comprises 2 subbands as.The bandwidth that is appreciated that each subband that described broadband comprises can be different, and for the concrete form of broadband and subband, the present embodiment does not limit.
In a kind of concrete application, described according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this subband corresponding with the channel quality indication of each subband can comprise: according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this subband corresponding with the channel quality indication of each subband is interval, and the Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of this subband on precalculated position is as the Signal to Interference plus Noise Ratio of this subband.
In the concrete application of another kind, described according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, the channel quality indication of obtaining this broadband corresponding with the Signal to Interference plus Noise Ratio in described broadband can comprise: according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, find the Signal to Interference plus Noise Ratio interval at the Signal to Interference plus Noise Ratio place in described broadband, obtain the channel quality indication with interval this corresponding broadband of described Signal to Interference plus Noise Ratio.
In technique scheme, each channel quality indication can be corresponding with a Signal to Interference plus Noise Ratio interval, that is to say, the Signal to Interference plus Noise Ratio that belongs to this Signal to Interference plus Noise Ratio interval all can indicate to represent with corresponding channel quality, therefore can pass through described corresponding relation, find the channel quality indication corresponding with a certain Signal to Interference plus Noise Ratio, thereby according to the Signal to Interference plus Noise Ratio of one section of frequency band, obtain the channel quality indication of this frequency band; Otherwise, also can according to the channel quality indication of one section of frequency band, obtain easily the Signal to Interference plus Noise Ratio of this frequency band.Be appreciated that in the interval of Signal to Interference plus Noise Ratio described in the present embodiment, precalculated position can be coboundary, lower boundary or the median in this Signal to Interference plus Noise Ratio interval, also can there be other value in certain described precalculated position, does not limit herein.It will be appreciated by those skilled in the art that, each channel quality indication can not be also corresponding one section of Signal to Interference plus Noise Ratio interval, but a corresponding Signal to Interference plus Noise Ratio value can be utilized this corresponding relation, directly according to the channel quality indication of a frequency band, obtain the Signal to Interference plus Noise Ratio of this frequency band, vice versa.
In a kind of specific implementation, the channel quality indication of the described N of an obtaining subband can comprise: the channel quality indication of obtaining the first subband in N subband, and the differential channel quality indication of obtaining N-1 the second subband in N subband, utilize the channel quality indication of described the first subband and the differential channel quality indication of N-1 the second subband to obtain the channel quality indication of N-1 the second subband.This process only needs the channel quality indication of the first subband and the differential channel quality indication of N-1 the second subband in N subband of channel quality indication feedback side's feedback, without the channel quality indication of each the second subband of complete feedback, can further reduce the expense of feedback of channel information.Described the first subband and the second subband are all N the subbands in subband, and the two there is no substantive difference, and its title is only for convenient statement.
Fig. 3 provide for embodiments of the invention another obtain the schematic diagram of the method for channel condition information, the method comprises:
S31: obtain the channel quality indication in broadband and the channel quality indication of N-1 the 3rd subband, wherein said broadband consists of N subband, and a described N subband comprises N-1 the 3rd subband and 1 the 4th subband, and wherein N is more than or equal to 2 integer;
S32: according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio in this broadband corresponding with the channel quality indication in described broadband and indicate the Signal to Interference plus Noise Ratio of the 3rd corresponding subband with the channel quality of each the 3rd subband;
S33: utilize the Signal to Interference plus Noise Ratio in described broadband and the Signal to Interference plus Noise Ratio of N-1 the 3rd subband to obtain the Signal to Interference plus Noise Ratio of the 4th subband;
S34: according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication of four subband corresponding with the Signal to Interference plus Noise Ratio of described the 4th subband.
The present embodiment by obtain the channel quality indication in broadband and wherein the channel quality of N-1 subband indicate, can obtain the channel quality indication of remaining 1 subband, without feedback of channel information side, feed back the channel quality indication of all subbands, the expense in the time that information feedback can being reduced.Described the 3rd subband and the 4th subband are all the subbands in described broadband, and the two there is no essential distinction, and its title is only for convenience of description.
In a kind of concrete application, described according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this broadband corresponding with the channel quality indication in described broadband can comprise: according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this broadband corresponding with the channel quality indication in described broadband is interval, and the Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval in this broadband on precalculated position is as the Signal to Interference plus Noise Ratio in this broadband; Correspondingly, described according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband can comprise: according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband is interval, and the Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of the 3rd subband on precalculated position is as the Signal to Interference plus Noise Ratio of the 3rd subband.
In the concrete application of another kind, described according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, the channel quality indication of obtaining four subband corresponding with the Signal to Interference plus Noise Ratio of described the 4th subband can comprise: the Signal to Interference plus Noise Ratio interval that obtains the Signal to Interference plus Noise Ratio place of described the 4th subband, according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication with interval the 4th corresponding subband of described Signal to Interference plus Noise Ratio.
Be appreciated that in the interval of Signal to Interference plus Noise Ratio described in the present embodiment, precalculated position can be coboundary, lower boundary or the median etc. in this Signal to Interference plus Noise Ratio interval.It will be appreciated by those skilled in the art that, each channel quality indication can not be also corresponding one section of Signal to Interference plus Noise Ratio interval, but a corresponding Signal to Interference plus Noise Ratio value can be utilized this corresponding relation, directly according to the channel quality indication of a frequency band, obtain the Signal to Interference plus Noise Ratio of this frequency band, vice versa.
In a kind of specific implementation, the described channel quality that obtains broadband is indicated and the channel quality indication of N-1 the 3rd subband can comprise: the channel quality indication of obtaining the 5th frequency band in N feedback frequency band, and the differential channel quality indication of obtaining N-1 the 6th frequency band in N feedback frequency band, utilize the channel quality indication of described the 5th frequency band and the differential channel quality indication of N-1 the 6th frequency band to obtain the channel quality indication of N-1 the 6th frequency band, described N feedback frequency band comprises a broadband and N-1 the 3rd subband.This process is considered as feeding back frequency band by broadband and N-1 the 3rd subband, now do not need the channel quality indication on each feedback frequency band of complete feedback, only need the channel quality indication of certain 1 frequency band and the differential channel quality indication of other frequency band in N feedback frequency band of channel quality indication feedback side's feedback, can further reduce the expense of feedback of channel information.Described broadband and N-1 the 3rd subband forms N frequency band altogether, wherein the frequency band of feed back full CQI is called as the 5th frequency band, only need the frequency band of feedback differential CQI to be called as the 6th frequency band, the title of described the 5th frequency band and the 6th frequency band is for convenient statement, is not used in restriction the present embodiment.
From above-described embodiment, between channel quality indication and Signal to Interference plus Noise Ratio, can there is certain corresponding relation, as can corresponding 1 Signal to Interference plus Noise Ratio interval in 1 channel quality indication, for ease of describing, describe for example below.In LTE system, UE can estimate according to the downstream signal of the eNB receiving the SINR of frequency band, if the SINR that is dB with SINR (dB) representation unit, between SINR (dB) and CQI, can there are certain mapping relations, the form of the available form of this relation shows, as shown in table 3, the corresponding one section of SINR (dB) of each CQI interval.Because SINR (dB) is an analog quantity, CQI quantizes digital quantity afterwards to SINR (dB), and the quantization step in the present embodiment is 1.892dB.
Table 3
The UE of the present embodiment can feed back a plurality of CQI, as 1 wideband A in Fig. 2 comprises 8 subbands, UE can only feed back the CQI of wideband A and subband S1, S2 ..., S7 CQI, the CQI of all the other subband S8 does not feed back, receiving terminal (normally eNB) receives after the CQI of wideband A and the CQI of 7 subbands, can obtain by the method for embodiment before the CQI of all the other subband S8.In concrete method for solving, receiving terminal can find the SINR that a certain CQI is corresponding (dB) interval according to the corresponding relation showing in table 3, by precalculated position in this interval, if coboundary, lower boundary or median etc. are as SINR corresponding to this CQI (dB), thereby obtain the SINR (dB) of wideband A and described 7 subbands, next can obtain by the SINR (dB) of wideband A and described 7 subbands the SINR (dB) of another subband S8.
Due to the SINR in a broadband with form between the SINR of all N subbands in this broadband and have linear relationship, available following formula (1) represents:
SINR W＝(SINR S1+SINR S2+…+SINR SN)/N； （1）
Wherein, N is for forming the number of sub-bands in this broadband, SINR wfor the SINR in broadband, SINR sNbe the SINR of N subband.Due to the CQI showing in table 3 and the corresponding relation between SINR (dB) interval, and for the situation that the unit of SINR is dB, there is following transformational relation SINR (dB)=10log 10sINR;
Thereby formula (1) can become formula (2) below:
10 SINR W 10 = ( 10 SINR S 1 ( dB ) 10 + 10 SINR S 2 10 + · · · 10 SINR SN dB 10 ) / N ; - - - ( 2 )
When learning broadband and wherein after the SINR of N-1 subband (dB), can be by utilizing formula (2) to calculate the SINR (dB) of all the other subbands, find again the SINR (dB) of this subband to belong to which SINR (dB) interval in table 3, thereby find the CQI of corresponding this subband, receiving terminal feeds back the CQI of this subband without receiving channel information feedback end like this, has reduced the expense of channel feedback.Be appreciated that logarithm and antilogarithm computational process in above-mentioned computing formula (2) can or table look-up to realize by software, hardware, the present embodiment does not limit this.Be appreciated that, what in table 3, provide is the interval corresponding relation of CQI and SINR (dB), but concrete corresponding relation not only has this kind of form, described mapping table can directly reflect the corresponding relation in CQI and SINR interval, now receiving terminal without carry out formula (2) to number conversion, only, by the calculating of formula (1), just can utilize broadband and the SINR of a part subband to obtain the SINR of all the other subbands.Obviously, formula (1) and (2) reflection is the SINR in broadband and the corresponding relation of the SINR of each subband wherein.The SINR in broadband equals the mean value of each subband SINR; The SINR of a subband to be solved equals: the SINR in broadband and the product of number of sub-bands, deduct the SINR of all the other whole subbands, i.e. SINR s1=SINR w* N-(SINR s2+ ... + SINR sN).
Above-mentioned computational process can reduce the uplink feedback expense of feedback of channel information side, if feedback of channel information side adopts differential feedback pattern, can further reduce feedback overhead.Below for the situation explanation of Fig. 2, the CQI feeding back due to needs has 8 (CQI of the CQI of wideband A and 7 subbands), can only feed back some complete CQI in these 8 CQI, all the other 7 CQI CQI that only feedback differential CQI(will feed back and the difference of complete CQI).The schematic diagram of a kind of uplink feedback pattern that Fig. 4 provides for the embodiment of the present invention, in this figure, adopts the CQI of 4Bit feedback wideband A, adopts the differential CQI of 7 subbands of 7 2Bit feedbacks, and another subband is without feedback, thus saving feedback overhead.
For solve the process of the CQI of wideband A by 8 subband CQI, also can adopt with embodiment before and similarly realize means, can adopt the CQI of a subband of 4Bit feedback, adopt 7 2Bit to feed back the differential CQI of all the other 7 subbands, wideband A is without feedback.Receiving terminal can restore by the differential CQI of the complete subband CQI of 4Bit and all the other 7 subbands the CQI of all the other 7 subbands, by the CQI of 8 subbands, find again SINR or the SINR (dB) of 8 subbands that obtain, by calculating SINR or the SINR (dB) in broadband, then draw broadband CQI according to corresponding relation.Band structure in corresponding diagram 2, the schematic diagram of another uplink feedback pattern that Fig. 5 provides for the embodiment of the present invention, one of them subband feedback overhead is 4Bit, and the feedback overhead of all the other subbands is 2Bit, and broadband does not take feedback overhead.
The broadband that is appreciated that the embodiment of the present invention can comprise subband, also can be used as the subband in all the other larger broadbands, and also can comprise less subband in a subband.Band structure in corresponding diagram 2, the schematic diagram of another uplink feedback pattern that Fig. 6 provides for the embodiment of the present invention, UE can feed back a broadband CQI with 4Bit, by 1 1/2nd broadband differential CQI of 2Bit feedback, by 2 1/4th broadband differential CQI of 2 2Bit feedbacks, by 4 feedback 1/8th broadband differential CQI of 4 2Bit feedbacks; If the CQI of the subband that the CQI in 1/8th broadbands will be solved in this example, after eNB receives the feedback of UE, can similarly solve the CQI that way obtains each 1/8th broadband (need solve final subband) by embodiment before.If corresponding diagram 2 describes, first receiving terminal can obtain the CQI of wideband A from feedback of channel information side, the CQI that comprises the frequency band of S1, S2, S3, S4, the CQI that comprises the frequency band of S1 and S2, the CQI that comprises the frequency band of S5 and S6, and the CQI of 4 subband S1, S3, S5, S7, and by the method for embodiment before, obtain the CQI of each subband.For example, when solving the CQI of subband S8, can first utilize the CQI and the CQI that comprises the frequency band of S1, S2, S3, S4 of wideband A, acquire the CQI of the frequency band that comprises S5, S6, S7, S8; The frequency band that comprises S5, S6, S7, S8 can be considered as to a broadband, the frequency band that comprises S5 and S6 is considered as to subband, obtain comprising the CQI of the frequency band of S7 and S8; Again the frequency band that comprises S7 and S8 is considered as to broadband, in conjunction with the CQI of subband S7, obtains the CQI of subband S8.
The band structure in corresponding diagram 2 still, the schematic diagram of another uplink feedback pattern that Fig. 7 provides for the embodiment of the present invention, channel feedback can be utilized the CQI of 4Bit feedback subband S1, utilize respectively 2Bit to feed back the differential CQI of the frequency band being formed by S1 and S2, and S1, S2, the differential CQI of the frequency band that S3 forms, the like, until feed back the differential CQI of whole wideband A, similar feedback method also may have multiple, but regardless of concrete feedback form, receiving terminal can be according to broadband CQI and the wherein CQI of part subband or the CQI that differential CQI restores all the other subbands, reach the effect of saving uplink feedback expense.
A kind of schematic diagram that obtains the equipment of channel condition information that Fig. 8 provides for embodiments of the invention, described equipment can comprise:
The first acquiring unit 81, for obtaining the channel quality indication of N subband;
The first corresponding unit 82, for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtains the Signal to Interference plus Noise Ratio of this subband corresponding with the channel quality indication of each subband, and wherein N is more than or equal to 2 integer;
First solves unit 83, and for utilizing the Signal to Interference plus Noise Ratio of a described N subband to obtain the Signal to Interference plus Noise Ratio in broadband, described broadband consists of a described N subband;
The first output unit 84, for according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtains the channel quality indication in this broadband corresponding with the Signal to Interference plus Noise Ratio in described broadband.
The equipment of the present embodiment can utilize the channel quality indication of N subband to obtain the channel quality indication in broadband, indicates the expense in the time of can reducing information feedback without the channel quality in feedback broadband, feedback of channel information side.In a kind of specific implementation, described equipment can be a base station, is specifically as follows the forms such as BS, NodeB, eNodeB, relay station, via node, and the present embodiment does not limit this.
Further, described the first corresponding unit 82 can comprise: the first respective modules, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this subband corresponding with the channel quality indication of each subband is interval, and the Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of this subband on precalculated position is as the Signal to Interference plus Noise Ratio of this subband.
Further, described the first output unit 84 can comprise: the first output module, be used for according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, find the Signal to Interference plus Noise Ratio interval at the Signal to Interference plus Noise Ratio place in described broadband, obtain the channel quality indication with interval this corresponding broadband of described Signal to Interference plus Noise Ratio.
Fig. 9 provide for embodiments of the invention another obtain the schematic diagram of the equipment of channel condition information, described equipment can comprise:
Second acquisition unit 91, for obtaining the channel quality indication in broadband and the channel quality indication of N-1 the 3rd subband, wherein said broadband consists of N subband, and a described N subband comprises N-1 the 3rd subband and 1 the 4th subband, and wherein N is more than or equal to 2 integer;
The second corresponding unit 92, for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio in this broadband corresponding with the channel quality indication in described broadband and indicate the Signal to Interference plus Noise Ratio of the 3rd corresponding subband with the channel quality of each the 3rd subband;
Second solves unit 93, for utilizing the Signal to Interference plus Noise Ratio in described broadband and the Signal to Interference plus Noise Ratio of N-1 the 3rd subband to obtain the Signal to Interference plus Noise Ratio of the 4th subband;
The second output unit 94, for according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtains the channel quality indication of four subband corresponding with the Signal to Interference plus Noise Ratio of described the 4th subband.
The equipment of the present embodiment can utilize the channel quality indication of broadband and N-1 subband to obtain the channel quality indication of a subband of residue, without feedback of channel information side, feed back the channel quality indication of each subband, the expense in the time that information feedback can being reduced.In a kind of specific implementation, described equipment is a base station, and described feedback of channel information can be thought a subscriber equipment.
Further, described the second corresponding unit 92 can comprise: the second respective modules, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this broadband corresponding with the channel quality indication in described broadband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval in this broadband on precalculated position is as the Signal to Interference plus Noise Ratio in this broadband
And for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband is interval, and the Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of the 3rd subband on precalculated position is as the Signal to Interference plus Noise Ratio of the 3rd subband.
Further, described the second output unit 94 can comprise: the second output module, for obtaining the Signal to Interference plus Noise Ratio interval at the Signal to Interference plus Noise Ratio place of described the 4th subband, according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication with interval the 4th corresponding subband of described Signal to Interference plus Noise Ratio.
The schematic diagram of the method for a kind of feeding back channel state information that Figure 10 provides for embodiments of the invention, the method comprises:
S101: obtain the channel quality indication of the 7th frequency band and the channel quality indication of N-1 the 8th frequency band, calculate the difference between the channel quality indication of each the 8th frequency band and the channel quality indication of the 7th frequency band, the differential channel quality of the 8th frequency band indication using each difference calculating as N-1 respectively, N is more than or equal to 2 integer;
S102: feed back the channel quality indication of described the 7th frequency band and the differential channel quality indication of described N-1 the 8th frequency band;
Wherein said the 7th frequency band is a broadband, comprises described N-1 the 8th frequency band and another subband, or described the 7th frequency band and described N-1 the 8th frequency band are all the subbands in other broadband.
In the information feedback scheme of prior art, need to feed back in He Gai broadband, broadband all CQI of N subbands, even if employing differential feedback, for the feedback differential CQI only of N-1 frequency band wherein, still needs to feed back 4+2N Bit; The present embodiment only need to feed back broadband and the CQI of N-1 subband wherein, or only feed back the CQI of N subband, in conjunction with differential feedback method, make to need feedack to only have 4+2(N-1) individual Bit, required feedback overhead is less than the full feedback scheme of prior art, thereby can reduce the amount of information of air interface transmission, save channel resource.
Further, described in, obtain the channel quality indication of the 7th frequency band and the channel quality of N-1 the 8th frequency band is indicated and can be comprised:
Receive downlink information, according to described downlink information, estimate the Signal to Interference plus Noise Ratio of the 7th frequency band and N-1 the 8th frequency band;
According to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication of seven frequency band corresponding with the Signal to Interference plus Noise Ratio of the 7th frequency band, and the channel quality indication of obtaining eight frequency band corresponding with the Signal to Interference plus Noise Ratio of each the 8th frequency band.
The present embodiment can adopt downlink information to estimate the SINR of frequency band, and concrete method of estimation prior art provides, and at this, does not repeat.Can, according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the CQI of this frequency band corresponding with the SINR of each frequency band.The method of the feeding back channel state information of the present embodiment is corresponding with the channel state information acquisition method of embodiment before, by the described CQI having fed back obtain do not feed back the process of frequency band CQI can be referring to the embodiment of channel state information acquisition method before.
The schematic diagram of the equipment of a kind of feeding back channel state information that Figure 11 provides for embodiments of the invention, this equipment comprises:
Information acquisition unit 111, for obtaining the channel quality indication of the 7th frequency band and the channel quality indication of N-1 the 8th frequency band, calculate the difference between the channel quality indication of each the 8th frequency band and the channel quality indication of the 7th frequency band, the differential channel quality of the 8th frequency band indication using each difference calculating as N-1 respectively, N is more than or equal to 2 integer;
Information feedback unit 112, for feeding back the channel quality indication of described the 7th frequency band and the differential channel quality indication of described N-1 the 8th frequency band;
Wherein, described the 7th frequency band is a broadband, comprises described N-1 the 8th frequency band and another subband, or described the 7th frequency band and described N-1 the 8th frequency band are all the subbands in other broadband.
The equipment feedack of above-described embodiment only has 4+2(N-1) individual Bit, can save the expense of channel feedback.
Further, described information acquisition unit 111 can comprise:
Acquisition of information module, for receiving downlink information, estimates the Signal to Interference plus Noise Ratio of the 7th frequency band and N-1 the 8th frequency band according to described downlink information;
Information computing module, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication of seven frequency band corresponding with the Signal to Interference plus Noise Ratio of the 7th frequency band, and the channel quality indication of obtaining eight frequency band corresponding with the Signal to Interference plus Noise Ratio of each the 8th frequency band.
In a kind of concrete application, the equipment of described feeding back channel state information can be a subscriber equipment, be specifically as follows mobile phone terminal, notebook computer, PDA(Personal Digital Assistant, personal digital assistant) etc. terminal equipment, the present embodiment does not limit this.
One of ordinary skill in the art will appreciate that all or part of flow process in said method embodiment, can come instruction related hardware to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various changes or modification and not depart from the spirit and scope of the present invention the present invention according to the disclosed content of application documents.Above embodiment, when saving channel feedback expense, does not bring obvious error, and the channel condition information CQI accuracy of acquisition is higher.

Claims (10)

1. a method of obtaining channel condition information, is characterized in that, comprising:
Obtain the channel quality indication of N subband;
According to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio of this subband corresponding with the channel quality indication of each subband, comprising:
According to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this subband corresponding with the channel quality indication of each subband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of this subband on precalculated position is as the Signal to Interference plus Noise Ratio of this subband, wherein, in described Signal to Interference plus Noise Ratio interval, precalculated position comprises coboundary, lower boundary or the median in this Signal to Interference plus Noise Ratio interval;
Wherein N is more than or equal to 2 integer;
Utilize the Signal to Interference plus Noise Ratio of a described N subband to obtain the Signal to Interference plus Noise Ratio in broadband, described broadband consists of a described N subband;
According to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication in this broadband corresponding with the Signal to Interference plus Noise Ratio in described broadband.
2. the method for claim 1, is characterized in that,
Described according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, the channel quality indication of obtaining this broadband corresponding with the Signal to Interference plus Noise Ratio in described broadband comprises: according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, find the Signal to Interference plus Noise Ratio interval at the Signal to Interference plus Noise Ratio place in described broadband, obtain the channel quality indication with interval this corresponding broadband of described Signal to Interference plus Noise Ratio.
3. method as claimed in claim 1 or 2, it is characterized in that, the channel quality indication of the described N of an obtaining subband comprises: the channel quality indication of obtaining 1 the first subband in N subband, and the differential channel quality indication of obtaining N-1 the second subband in N subband, utilize the channel quality indication of described the first subband and the differential channel quality indication of N-1 the second subband to obtain the channel quality indication of N-1 the second subband.
4. a method of obtaining channel condition information, is characterized in that, comprising:
Obtain the channel quality indication in broadband and the channel quality indication of N-1 the 3rd subband, wherein said broadband consists of N subband, and a described N subband comprises described N-1 the 3rd subband and 1 the 4th subband, and wherein N is more than or equal to 2 integer;
According to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio in this broadband corresponding with the channel quality indication in described broadband and indicate the Signal to Interference plus Noise Ratio of the 3rd corresponding subband with the channel quality of each the 3rd subband;
Wherein, described according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband comprises: according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of the 3rd subband on precalculated position is as the Signal to Interference plus Noise Ratio of the 3rd subband, wherein, in described Signal to Interference plus Noise Ratio interval, precalculated position comprises the coboundary in this Signal to Interference plus Noise Ratio interval, lower boundary or median,
Utilize the Signal to Interference plus Noise Ratio in described broadband and the Signal to Interference plus Noise Ratio of N-1 the 3rd subband to obtain the Signal to Interference plus Noise Ratio of the 4th subband;
According to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication of four subband corresponding with the Signal to Interference plus Noise Ratio of described the 4th subband.
5. method as claimed in claim 4, is characterized in that,
Described according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this broadband corresponding with the channel quality indication in described broadband comprises: according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this broadband corresponding with the channel quality indication in described broadband is interval, and the Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval in this broadband on precalculated position is as the Signal to Interference plus Noise Ratio in this broadband;
Described according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, the channel quality indication of obtaining four subband corresponding with the Signal to Interference plus Noise Ratio of described the 4th subband comprises: the Signal to Interference plus Noise Ratio interval that obtains the Signal to Interference plus Noise Ratio place of described the 4th subband, according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication with interval the 4th corresponding subband of described Signal to Interference plus Noise Ratio.
6. the method as described in claim 4 or 5, it is characterized in that, the described channel quality that obtains broadband is indicated and the channel quality indication of N-1 the 3rd subband comprises: the channel quality indication of obtaining 1 the 5th frequency band in N feedback frequency band, and the differential channel quality indication of obtaining N-1 the 6th frequency band in N feedback frequency band, utilize the channel quality indication of described the 5th frequency band and the differential channel quality indication of N-1 the 6th frequency band to obtain the channel quality indication of N-1 the 6th frequency band, described N feedback frequency band comprises a broadband and N-1 the 3rd subband, described broadband and N-1 the 3rd subband forms N frequency band altogether, wherein said the 5th frequency band is the frequency band of feedback channel quality indication, described the 6th frequency band is the frequency band of feedback differential channel quality indication.
7. an equipment that obtains channel condition information, is characterized in that, comprising:
The first acquiring unit, for obtaining the channel quality indication of N subband;
The first corresponding unit, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio of this subband corresponding with the channel quality indication of each subband, wherein N is more than or equal to 2 integer, described the first corresponding unit comprises: the first respective modules, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this subband corresponding with the channel quality indication of each subband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of this subband on precalculated position is as the Signal to Interference plus Noise Ratio of this subband, wherein, in described Signal to Interference plus Noise Ratio interval, precalculated position comprises the coboundary in this Signal to Interference plus Noise Ratio interval, lower boundary or median,
First solves unit, and for utilizing the Signal to Interference plus Noise Ratio of a described N subband to obtain the Signal to Interference plus Noise Ratio in broadband, described broadband consists of a described N subband;
The first output unit, for according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtains the channel quality indication in this broadband corresponding with the Signal to Interference plus Noise Ratio in described broadband.
8. equipment as claimed in claim 7, is characterized in that,
Described the first output unit comprises: the first output module, be used for according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, find the Signal to Interference plus Noise Ratio interval at the Signal to Interference plus Noise Ratio place in described broadband, obtain the channel quality indication with interval this corresponding broadband of described Signal to Interference plus Noise Ratio.
9. an equipment that obtains channel condition information, is characterized in that, comprising:
Second acquisition unit, for obtaining the channel quality indication in broadband and the channel quality indication of N-1 the 3rd subband, wherein said broadband consists of N subband, and a described N subband comprises N-1 the 3rd subband and 1 the 4th subband, and wherein N is more than or equal to 2 integer;
The second corresponding unit, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, obtain the Signal to Interference plus Noise Ratio in this broadband corresponding with the channel quality indication in described broadband, and the Signal to Interference plus Noise Ratio of three subband corresponding with the channel quality indication of each the 3rd subband, described the second corresponding unit comprises: the second respective modules, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains three subband corresponding with the channel quality indication of each the 3rd subband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval of the 3rd subband on precalculated position is as the Signal to Interference plus Noise Ratio of the 3rd subband, wherein, in described Signal to Interference plus Noise Ratio interval, precalculated position comprises the coboundary in this Signal to Interference plus Noise Ratio interval, lower boundary or median,
Second solves unit, for utilizing the Signal to Interference plus Noise Ratio in described broadband and the Signal to Interference plus Noise Ratio of N-1 the 3rd subband to obtain the Signal to Interference plus Noise Ratio of the 4th subband;
The second output unit, for according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtains the channel quality indication of four subband corresponding with the Signal to Interference plus Noise Ratio of described the 4th subband.
10. equipment as claimed in claim 9, is characterized in that,
Described the second corresponding unit comprises: the second respective modules, be used for according to the corresponding relation between channel quality indication and Signal to Interference plus Noise Ratio, the Signal to Interference plus Noise Ratio that obtains this broadband corresponding with the channel quality indication in described broadband is interval, Signal to Interference plus Noise Ratio in the Signal to Interference plus Noise Ratio interval in this broadband on precalculated position is as the Signal to Interference plus Noise Ratio in this broadband
Described the second output unit comprises: the second output module, for obtaining the Signal to Interference plus Noise Ratio interval at the Signal to Interference plus Noise Ratio place of described the 4th subband, according to the corresponding relation between described channel quality indication and Signal to Interference plus Noise Ratio, obtain the channel quality indication with interval the 4th corresponding subband of described Signal to Interference plus Noise Ratio.
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102291213B (en) * 2011-08-15 2017-06-16 中兴通讯股份有限公司 A kind of terminal and method for calculating channel quality indication (CQI) information
CN102523077B (en) * 2012-01-10 2014-04-23 合肥东芯通信股份有限公司 Method and device for measuring channel state information in LTE (Long Term Evolution) system
CN104639279B (en) * 2013-11-11 2018-03-27 富士通株式会社 Feedback device, user equipment and the method for channel quality instruction
CN104239951B (en) * 2014-09-10 2017-01-25 西安交通大学 Unbound people counting method achieved by means of channel state information
CN107294573A (en) * 2016-04-07 2017-10-24 北京信威通信技术股份有限公司 Feedback method, device and the terminal of channel information
CN107872293B (en) 2016-09-28 2023-04-07 华为技术有限公司 Signal transmission method and device
CN110535510B (en) 2018-08-10 2022-10-18 中兴通讯股份有限公司 Method, device and storage medium for reporting/processing channel state information

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1852040A (en) * 2005-09-13 2006-10-25 上海华为技术有限公司 Distribution method of high-speed down ward grouped access resource
CN101203047A (en) * 2006-11-30 2008-06-18 美国博通公司 Method and apparatus for processing signal in a wireless communication system
CN101411110A (en) * 2006-03-27 2009-04-15 高通股份有限公司 Feedback of channel state information for MIMO and subband scheduling in a wireless communication system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101502137A (en) * 2006-08-08 2009-08-05 松下电器产业株式会社 Radio communication mobile station device and resource allocation method
US7961672B2 (en) * 2007-02-23 2011-06-14 Texas Instruments Incorporated CQI feedback for OFDMA systems
US8094761B2 (en) * 2007-12-07 2012-01-10 Samsung Electronics Co., Ltd. Uplink feedback for supporting MIMO operation in the LTE downlink
US8195099B2 (en) * 2007-12-28 2012-06-05 Qualcomm Incorporated Speed estimation and power control based on CQI reports

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1852040A (en) * 2005-09-13 2006-10-25 上海华为技术有限公司 Distribution method of high-speed down ward grouped access resource
CN101411110A (en) * 2006-03-27 2009-04-15 高通股份有限公司 Feedback of channel state information for MIMO and subband scheduling in a wireless communication system
CN101203047A (en) * 2006-11-30 2008-06-18 美国博通公司 Method and apparatus for processing signal in a wireless communication system

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