CN101729473B - Method for feeding back quality index of channel and receiver - Google Patents
Method for feeding back quality index of channel and receiver Download PDFInfo
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Abstract
The invention discloses a method for feeding back a quality index of a channel and a receiver. The method comprises that: the receiver constructs quality index information of the channel and the quality index information of the channel at least carries the following pre-acquired information: position information and a quality index value of the channel corresponding to an optimal sub-band in a feedback frequency band, position information corresponding to a non-optimal sub-band in a feedback frequency band, position information corresponding to a sub-band lower than a threshold of a pre-determined quality index value of the channel in a non-feedback frequency band, position information corresponding to a resource block lower than a mean value of the quality index of the channel of the optimal sub-band in the optimal sub-band, and a mean value of the quality index of the channel corresponding to the sub-band higher than the threshold of the pre-determined quality index value of the channel in a full frequency band; and the receiver feeds the constructed quality index information of the channel back to an emitter. The feedback accuracy can be improved through the processing. The emitter can perform scheduling by referring to more accurate feedback information so as to effectively improve the system throughput and improve the system performance.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of channel quality index feedback method and receiver.
Background technology
In correlation technique, quality index of a channel (Channel Quality Indication abbreviates CQI as) is the channel condition information that receiver feeds back to transmitter in the communication system.Receive the CQI of receiver feedback at transmitter after, transmitter corresponds to certain transmission block size, coded system and modulation system with the CQI information that receiver fed back, and is that receiver carries out resource allocation and scheduling according to CQI information on this basis.CQI information really degree and the expense of feeding back the up link that is consumed of the channel that can reflect all can produce bigger influence to systematic function.
In practical application; The validity of the channel that CQI information is reflected is conflicting with the resource that feedback is consumed, and reflects channel if desired as far as possible truly, can take the unity feedback strategy; Promptly; Feed back the channel quality information of each scheduling unit on the whole working band, still, this will produce bigger expense.For example; For the communication system of a 10M bandwidth, adopt OFDM (Orthogonal Frequency DivisionMultiplexing abbreviates OFDM as) technology that whole frequency band is divided into 600 number of sub-carrier; Per 12 number of sub-carrier are as a Resource Block; Can be divided into 50 Resource Block, if with each Resource Block as a scheduling unit, so need 50 CQI values to reflect the channel quality of each Resource Block on the whole frequency band; Therefore, consumed the expense of more up link.
At present, proposed the various feedback method, mainly comprised following several kinds: 1, average CQI feedback: average CQI value of whole transmission bandwidth internal feedback to CQI; 2, CQI feeds back fully: the CQI value of feeding back all Resource Block in the whole bandwidth; 3, the CQI of M optimum Resource Block feedback: feed back the positional information of M maximum CQI value, its place Resource Block, and the average CQI value on other Resource Block; 4, the CQI average of M optimum Resource Block feedback: feed back the average of M maximum CQI value, the positional information of its place Resource Block and the average CQI value on other Resource Block; 5, the CQI feedback of the optimum M of a grouping Resource Block: divide into groups to adopt the mode of circulation, report the CQI of M Resource Block of optimum in a group at every turn; 6, based on the CQI of thresholding feedback: the CQI value in the full range band of measuring based on each receiver, calculate the mean value that is included in the interior CQI value of the highest CQI value and CQI thresholding, the positional information of this average CQI value and these CQI values is fed back to transmitter; 7, differential CQI feedback: the differential CQI value (1bit) of at every turn feeding back an absolute CQI value and other Resource Block; Wherein, the calculating of differential CQI bit can be divided into the difference information and the difference information dual mode that calculates time domain in calculated rate territory; 8, graduation continuous resource piece CQI feedback: whole transmission bandwidth divides some grades, comprises the information and the CQI value information of class information, Resource Block in the CQI feedback information; 9, the discontinuous Resource Block CQI feedback of graduation: comprise the bitmap and the CQI value of Resource Block in the CQI feedback information, wherein, bitmap has provided the position with the corresponding Resource Block of CQI value.
At present, in long evolving system (Long Term Evolution abbreviates LTE as); CQI for go up transmission at Physical Uplink Control Channel (Physical Uplink Control Channel abbreviates PUCCH as) feeds back employed the setting as follows: 6 Resource Block (Resource Block abbreviates RB as) constitute a subband; 3 subbands constitute a frequency range; A frequency range is fed back with the mode of Best-M at every turn, wherein, M=1.Above-mentioned Best-M CQI feedback method is exactly in all feedback subbands, to find M maximum subband of CQI value; Feed back the position and the corresponding CQI value thereof of this M subband; The CQI value of all the other subbands is the average of all subband CQI values; And on PUCCH, carry out subband CQI feedback with the mode of Best-M, its step is following:
1, the terminal calculates the frequency range of current feedback;
2, in the CQI value at the optimum subband of feedback frequency range internal feedback place and the position of optimum subband;
3, feed back the CQI value of all the other subbands, this value is the average of all subband CQI values;
4, the subband CQI value fed back according to the terminal of base station recovers the CQI value on each RB, and the CQI value in each subband on each RB is subband CQI value.
Through above-mentioned processing, can find out that the shortcoming of this method is: the feedback information inaccuracy, that is, receiver institute feedack can not accurately reflect channel conditions, and scheduling is produced than mistake, can not improve throughput of system effectively.Yet, the technical scheme that can effectively address the above problem is not proposed at present as yet.
Summary of the invention
Consider existing quality index of a channel feedback information inaccuracy; Thereby transmitter was produced than the problem of mistake in when scheduling propose the present invention; For this reason; Main purpose of the present invention is to provide a kind of channel quality index feedback method and receiver, to solve the problems referred to above that exist in the correlation technique.
According to an aspect of the present invention, a kind of channel quality index feedback method is provided.
According to channel quality index feedback method of the present invention; Comprise: receiver structure quality index of a channel information, and in quality index of a channel information, carry the following information of obtaining in advance at least: optimum subband corresponding position information in the feedback frequency range and quality index of a channel value, feed back and be lower than the subband corresponding channel quality index average that is higher than predetermined channel performance figure value thresholding in the Resource Block corresponding position information that is lower than the quality index of a channel average of optimum subband in the subband corresponding position information of predetermined channel performance figure value thresholding, the optimum subband, the full range band in non-optimum subband corresponding position information and the non-feedback frequency range in the frequency range; Receiver is to the quality index of a channel information of transmitter feedback configuration.
In addition, before the receiver structure quality index of a channel information, further comprise: confirm feedback frequency range and non-feedback frequency range in the full range band; For each subband, confirm the quality index of a channel value of subband, wherein, the quality index of a channel value of subband is the quality index of a channel average of each Resource Block in the subband; Confirm the position of optimum subband and the quality index of a channel value of optimum subband; Confirm to be lower than in the optimum subband position of the Resource Block of its quality index of a channel value; Confirm predetermined channel performance figure value thresholding; Confirm to be lower than in the non-feedback frequency range subband position of predetermined channel performance figure value thresholding; Confirm the quality index of a channel average that is higher than the subband position of predetermined channel performance figure value thresholding in the full range band and is higher than the subband of predetermined channel performance figure value thresholding.
Wherein, specifically being treated to of receiver structure quality index of a channel information: for the non-optimum subband in the feedback frequency range, if its quality index of a channel value is not higher than predetermined channel performance figure value thresholding, then its quality index of a channel value is set to 0; The quality index of a channel value of the optimum subband of receiver is set to the quality index of a channel value at optimum subband place; The quality index of a channel that is lower than the subband of predetermined channel performance figure value thresholding in the non-feedback frequency range is set to 0; The quality index of a channel that is higher than predetermined channel performance figure value thresholding in the full frequency band is set to be higher than the quality index of a channel average of the subband of predetermined channel performance figure value thresholding; The quality index of a channel of Resource Block that is lower than the quality index of a channel value of optimum subband in the optimum subband is set to 0; The quality index of a channel value of each Resource Block in the non-optimum subband is set to the quality index of a channel value of non-optimum subband.
Wherein, predetermined channel performance figure value thresholding is that the quality index of a channel average of all subbands deducts predetermined value in the full frequency band, and wherein, predetermined value be greater than zero and less than the positive integer of quality index of a channel average.
In addition, before receiver is constructed, further comprise: receiver is provided with the number of the optimum subband in the feedback frequency range according to system bandwidth.
According to an aspect of the present invention, a kind of receiver is provided.
Receiver according to the present invention comprises: constructing module; Be used to construct quality index of a channel information, and in quality index of a channel information, carry the following information of obtaining in advance at least: optimum subband corresponding position information and the quality index of a channel value of feedback in the frequency range, feed back and be lower than the subband corresponding channel quality index average that is higher than predetermined channel performance figure value thresholding in the Resource Block corresponding position information that is lower than the quality index of a channel average of optimum subband in the subband corresponding position information of predetermined channel performance figure value thresholding, the optimum subband, the full range band in non-optimum subband corresponding position information and the non-feedback frequency range in the frequency range; Feedback module is used for the quality index of a channel information to the transmitter feedback configuration.
In addition, above-mentioned constructing module may further include: first confirms submodule, is used for confirming feedback frequency range and the non-feedback frequency range in the said full range band; Second confirms submodule, is used for for each subband, confirms the quality index of a channel value of subband, and wherein, the quality index of a channel value of said subband is the quality index of a channel average of each Resource Block in the said subband; The 3rd confirms submodule, is used for confirming the position of said optimum subband and the quality index of a channel value of said optimum subband; The 4th confirms submodule, is used for confirming to be lower than in the said optimum subband position of the Resource Block of its quality index of a channel value; The 5th confirms submodule, is used for confirming said predetermined channel performance figure value thresholding; The 6th confirms submodule, is used for confirming to be lower than in the said non-feedback frequency range subband position of said predetermined channel performance figure value thresholding; The 7th confirms submodule, is used for the quality index of a channel average that is higher than the subband position of said predetermined channel performance figure value thresholding and is higher than the subband of said predetermined channel performance figure value thresholding in definite said full range band.
In addition; Above-mentioned constructing module can further include: first is provided with submodule; Be used for for the non-optimum subband in the said feedback frequency range, if its quality index of a channel value is not higher than said predetermined channel performance figure value thresholding, then its quality index of a channel value is set to 0; Second is provided with submodule, and the quality index of a channel value that is used for said optimum subband is set to the quality index of a channel value at said optimum subband place; The 3rd is provided with submodule, and the quality index of a channel that is used for being lower than in the said non-feedback frequency range subband of said predetermined channel performance figure value thresholding is set to 0; The 4th is provided with submodule, and the quality index of a channel that is used for being higher than in the said full frequency band said predetermined channel performance figure value thresholding is set to the said quality index of a channel average that is higher than the subband of said predetermined channel performance figure value thresholding; The 5th is provided with submodule, and the quality index of a channel of Resource Block that is used for being lower than in the said optimum subband quality index of a channel value of said optimum subband is set to 0; The 6th is provided with submodule, and the quality index of a channel value that is used for each Resource Block in the said non-optimum subband is set to the quality index of a channel value of said non-optimum subband.
In addition, receiver can further include: module is set, is used for being provided with according to system bandwidth the number of the optimum subband in the feedback frequency range.
By means of technical scheme of the present invention,, increase feedback information through improvement to the CQI feedback method; Solved the quality index of a channel feedback information inaccuracy of present existence, thereby made transmitter when scheduling, produce problem, than prior art than mistake; Can improve the accuracy of feedback; Make transmitter to dispatch, thereby improve throughput of system effectively, improve systematic function with reference to accurate more feedback information.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the detailed process of the channel quality index feedback method of the embodiment of the invention;
Fig. 2 is the flow chart according to the instance of the channel quality index feedback method of the embodiment of the invention;
Fig. 3 is the block diagram according to the receiver of the embodiment of the invention;
Fig. 4 is the block diagram according to the preferred embodiment of the receiver of the embodiment of the invention.
Embodiment
Functional overview
In correlation technique; When receiver carries out subband CQI feedback with the mode of Best-M (M optimum CQI value) on PUCCH, receiver institute feedack can occur and can not accurately reflect channel conditions, thereby make transmitter when scheduling generation than the problem of mistake; Therefore; The invention provides a kind of CQI dispatching method, specifically comprise: receiver carries following information at least when feedback CQI: 1, the position and the corresponding CQI value of optimum subband in the feedback frequency band; 2, the subband position that is lower than thresholding in the non-feedback frequency band; 3, the CQI value that is higher than thresholding in the full range band; 4, the Resource Block that is lower than its average (RB) position in the optimum subband.
In addition; During CQI value in transmitter structure whole frequency band; At first the CQI value with each RB is changed to the subband CQI average that is higher than thresholding; And then the CQI value that is lower than the subband place of thresholding in the non-feedback frequency range is changed to 0, and the CQI value that will feed back the optimum subband position in the frequency band afterwards again is for to be set to its corresponding CQI value, and the CQI value that is lower than the RB place of its average in the optimum again subband is set to 0.That is to say; Receiver is mainly confirmed feedback frequency range interior optimum subband position and CQI value thereof, confirms the CQI thresholding, is confirmed except that optimum subband, to be lower than the subband position of CQI thresholding and the RB position of confirming to be lower than in the optimum subband its CQI average, and gives the base station with the feedback information of confirming as stated above.Need to prove that above-mentioned subband CQI value refers to the average of the CQI value of each RB in this subband.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Method embodiment
According to embodiments of the invention, a kind of CQI feedback method is provided, Fig. 1 is the flow chart according to the CQI feedback method of the embodiment of the invention, wherein, the step that illustrates in the method can be carried out in the computer system such as a set of computer-executable instructions.Though logical order has been shown in Fig. 1, in other cases, can have carried out step shown or that describe with the order that is different from here.As shown in Figure 1, comprise following processing:
The first step, receiver are confirmed optimum subband position and the CQI value thereof in the feedback frequency range; Comprise following processing:
1, confirms feedback frequency range and the non-feedback frequency range that the full range band is interior;
2, for each subband, confirm the CQI value of subband, wherein, the CQI value of subband is the CQI average of each Resource Block in the subband;
3, confirm the position of optimum subband and the CQI value of optimum subband; Wherein, the number of optimum subband can be provided with according to the system bandwidth size;
In second step, receiver is confirmed the CQI thresholding and except that optimum subband, is lower than the RB position that is lower than its CQI average in the subband position of CQI thresholding, the optimum subband; Specifically comprise following processing:
1, receiver is at first confirmed predetermined C QI value thresholding; Threshold value can be provided with, and can be that the CQI average of all subbands in the full frequency band deducts predetermined value with the threshold setting of predetermined C QI value, and wherein, predetermined value is greater than zero and less than the positive integer of CQI average.For example, be generally average CQI value and subtract x, x gets greater than 0 and less than the integer of average CQI value;
2, confirm to be lower than in the non-feedback frequency range subband position of predetermined C QI value thresholding;
3, receiver is confirmed the CQI average that is higher than the subband position of predetermined C QI value thresholding in the full range band and is higher than the subband of predetermined C QI value thresholding;
4, find the RB position that is lower than its subband CQI value in the optimum subband at last;
If non-optimum subband does not belong to the set of the subband position that is higher than thresholding in the 5a feedback frequency range, receiver then is changed to 0 with their CQI value;
The CQI value of 5b, optimum subband is set to the CQI value at optimum subband place;
The CQI that is lower than the subband of predetermined C QI value thresholding in 5c, the non-feedback frequency range is set to 0;
The CQI that is higher than predetermined C QI value thresholding in 5d, the full frequency band is set to be higher than the CQI average of the subband of predetermined C QI value thresholding;
The CQI of Resource Block that is lower than the CQI value of optimum subband in 5e, the optimum subband is set to 0;
The CQI value of each Resource Block in 5h, the non-optimum subband is set to the CQI value of non-optimum subband;
The 3rd step; Receiver feeds back to transmitter with the first step and the positional information and the CQI value that obtain in second step, comprising: optimum subband corresponding position information in the feedback frequency range and CQI value, feed back and be lower than the CQI average that is higher than the subband correspondence of predetermined C QI value thresholding in the Resource Block corresponding position information that is lower than the CQI average of optimum subband in the subband corresponding position information of predetermined C QI value thresholding, the optimum subband, the full range band in interior non-optimum subband corresponding position information of frequency range and the non-feedback frequency range;
The 4th step; Transmitter carries out the recovery of the CQI value of RB according to the receiver feedack; The rule of its recovery is: the CQI value at optimum subband place is its corresponding subband CQI value, and the CQI that is lower than the subband place of thresholding in the non-feedback frequency range is changed to 0, and the CQI that is higher than the thresholding position in the whole frequency band is changed to the CQI average of the subband that is higher than thresholding; CQI with the RB that is lower than its subband CQI value in the optimum subband is changed to 0 again, and the RB CQI value in each subband of all the other non-optimums is its subband CQI value.
Below, further combine accompanying drawing that the technical scheme of the embodiment of the invention is illustrated.
In this example, that adopts the LTE regulation goes up the setting of transmitting the CQI feedback information to PUCCH, promptly; 50 RB of whole frequency band are divided into 9 subbands; 6 RB of each subband except that last subband, last subband comprises 2 RB, and per 3 subbands constitute a feedback frequency range; Each feedback is carried out poll to these 3 feedback frequency ranges respectively, and in the feedback frequency range, finds the maximum subband of 1 CQI value.
Wherein, Subscriber equipment (User Equipment; Abbreviate UE as) main optimum subband position and the CQI value of confirming in the feedback frequency range thereof, confirm the CQI thresholding and except that optimum subband, be lower than the subband position of CQI thresholding; Be lower than the RB position of its CQI average in the optimum subband, and the feedback information that will confirm is as stated above given the base station.Fig. 2 is the flow chart according to the instance of the channel quality index feedback method of the embodiment of the invention, and is as shown in Figure 2, comprises following processing:
The first step, UE (above-mentioned receiver) confirms the frequency range that this feeds back constantly and the frequency range of non-feedback, is example with feedback frequency range 1, and then feeding back frequency range is frequency range subband 1,2,3, and non-feedback frequency range is a subband 4,5,6,7,8,9;
Second step, the average CQI value of 9 subbands of calculating, wherein, subband CQI value is: [4 2356778 9];
The 3rd step, confirm that the maximum CQI value of subband 1 in the feedback frequency range is 4, with and the subband position; Can find out that first to the 3rd step handled corresponding to the first step shown in Fig. 1;
In the 4th step, UE confirms the CQI thresholding on the whole frequency band, and thresholding is that average CQI value subtracts x, (0 < x < CQI thresholding); For example, UE subband average is 6, gets x=2, and then thresholding CQI value is 6-2=4; Confirm that the CQI value is lower than 4 subband position in the non-feedback frequency range, be empty this moment, is not provided with; If the subband CQI value of certain UE is [4 2356712 3], getting thresholding and be the interior CQI value of 3 non-feedback frequency ranges, to be lower than 3 subband position be subband 7,8, and then the CQI value with subband 7,8 places is changed to 0;
The 5th step, ask whole frequency band to be higher than the position of thresholding and the average of the CQI that all are higher than thresholding, the position that is higher than thresholding is a subband 4,5,6,7,8,9, the CQI average that is higher than thresholding is 7;
In the 6th step, if non-optimum subband 2,3 does not belong to the set of the subband position that is higher than thresholding in the feedback frequency range subband 1,2,3, then the CQI value with them is changed to 0, and promptly the CQI value of subband 2,3 is changed to 0;
The 7th step; Confirm to be lower than in the optimum subband RB position of its CQI average 4, the CQI value at each RB place that obtains through system optimization, and then the CQI value of each subband that obtains; The CQI value of the RB position that is lower than its average CQI value in the optimum subband is changed to 0; For example, the CQI value at 6 RB places is respectively in first subband: 433564, and then the CQI value is lower than 4 RB2,3 their CQI value is changed to 0; The the 4th to the 7th step went on foot corresponding to second shown in Fig. 1;
In the 8th step, UE gives base station (corresponding to the 3rd step shown in Fig. 1) with the feedback information that obtains, and the feedback result of this instance is:
1, position and the CQI value 4 thereof of optimum subband (subband 1) in the current feedback frequency range of feedback (go on foot obtain by the 3rd);
2, because for empty, does not then carry out the position that is lower than thresholding in the non-feedback frequency range in this feedback, otherwise the CQI value that will be lower than the thresholding position is changed to 0;
The CQI that 3, will be higher than subband 4,5,6,7,8,9 places of thresholding is changed to 7;
4, if feed back non-optimum subband (subband 2 in the frequency range; 3) do not belong to the set of the subband position that is higher than thresholding; Then the CQI value with them was changed to for 0 (subband 2,3 does not belong to the subband location sets that is higher than thresholding in this example, so the CQI value at subband 2,3 places all is changed to 0);
5, with CQI value in the optimum subband (subband 1) be lower than 4 RB2, the CQI at 3 places is changed to 0;
6, to each subband of non-optimum, the CQI value of its inner each RB all is changed to the CQI value of subband, and this moment, optimum referring to fed back the interior optimum subband of frequency range;
In the 9th step, (corresponding to the 4th step shown in Fig. 1) recovered according to the CQI value that the UE feedack carries out RB in the base station.
Can find out that through above-mentioned processing no matter be that the feedback frequency range also is non-feedback frequency range, the CQI value of each subband all has clear and definite definite method, and they all have been arranged in the reasonable range.The CQI value that is higher than the subband of thresholding is set to the average of the CQI value of all subbands that are higher than thresholding; The CQI value that is lower than the subband place of thresholding then is changed to 0, only need feed back subband position and CQI average that is higher than thresholding when the subband UE that is higher than thresholding is fed back, and only need feed back the subband position that is lower than thresholding for the subband UE that is lower than thresholding; The CQI value of each RB in the optimum subband in the also clear and definite simultaneously feedback frequency range; The CQI that will be lower than the RB of its average is changed to 0, the subband of poor-performing and the CQI value at RB place is changed to 0, therefore; Can avoid the subband and the RB of poor-performing to be scheduled; Because if the Resource Block of poor-performing is scheduled and not only can not improves the throughput of system, make on the contrary quality preferably Resource Block can not bring into play its advantage, reduced the throughput of system.
Device embodiment
According to embodiments of the invention, a kind of receiver is provided, Fig. 3 is the block diagram according to the receiver of the embodiment of the invention, and is as shown in Figure 3, comprises constructing module 30, feedback module 32, below, in conjunction with accompanying drawing this receiver is elaborated.
Constructing module 30; Be used to construct CQI information, and in CQI information, carry the following information of obtaining in advance at least: optimum subband corresponding position information and the CQI value of feedback in the frequency range, feed back and be lower than the CQI average that is higher than the subband correspondence of predetermined C QI value thresholding in the Resource Block corresponding position information that is lower than the CQI average of optimum subband in the subband corresponding position information of predetermined C QI value thresholding, the optimum subband, the full range band in non-optimum subband corresponding position information and the non-feedback frequency range in the frequency range; Need to prove that the predetermined C QI value thresholding here is that the CQI mean value of all subbands deducts predetermined value in the full frequency band, wherein, predetermined value is preferably greater than zero and less than the positive integer of the mean value of CQI.
In addition, as shown in Figure 4, above-mentioned constructing module 30 may further include:
Confirm submodule 40, it can be used for carrying out one or more operations of following operation: 1, confirm feedback frequency range and non-feedback frequency range in the full range band; 2, for each subband, confirm the CQI value of subband, wherein, the CQI value of subband is the CQI average of each Resource Block in the subband; 3, confirm the position of optimum subband and the CQI value of optimum subband; 4, confirm to be lower than in the optimum subband position of the Resource Block of its CQI value; 5, confirm predetermined C QI value thresholding; 6, confirm to be lower than in the non-feedback frequency range subband position of predetermined C QI value thresholding; 7, confirm the CQI average that is higher than the subband position of predetermined C QI value thresholding in the full range band and is higher than the subband of predetermined C QI value thresholding.
Submodule 42 is set, is connected to and confirms submodule 40, it can be used to carry out following operation at least: 1, for the non-optimum subband in the feedback frequency range, if its CQI value is not higher than predetermined C QI value thresholding, then its CQI value is set to 0; 2, the CQI value of the optimum subband of receiver is set to the CQI value at optimum subband place; 3, the CQI that is lower than the subband of predetermined C QI value thresholding in the non-feedback frequency range is set to 0; 4, the CQI that is higher than predetermined C QI value thresholding in the full frequency band is set to be higher than the CQI average of the subband of predetermined C QI value thresholding; 5, the CQI of Resource Block that is lower than the CQI value of optimum subband in the optimum subband is set to 0; 6, the CQI value of each Resource Block in the non-optimum subband is set to the CQI value of non-optimum subband.
Need to prove, confirm submodule 40 and submodule 42 is set is divided into several discrete secondary submodules again, to carry out one or more in the function separately respectively.
For example, will confirm that submodule 40 is divided into following secondary submodule:
First confirms submodule, is used for confirming feedback frequency range and the non-feedback frequency range in the full range band;
Second confirms submodule, is used for for each subband, confirms the quality index of a channel value of subband, and wherein, the quality index of a channel value of subband is the quality index of a channel average of each Resource Block in the subband;
The 3rd confirms submodule, is used for confirming the position of optimum subband and the quality index of a channel value of optimum subband;
The 4th confirms submodule, is used for confirming to be lower than in the optimum subband position of the Resource Block of its quality index of a channel value;
The 5th confirms submodule, is used for confirming predetermined channel performance figure value thresholding;
The 6th confirms submodule, is used for confirming to be lower than in the non-feedback frequency range subband position of predetermined channel performance figure value thresholding;
The 7th confirms submodule, is used for the quality index of a channel average that is higher than the subband position of predetermined channel performance figure value thresholding and is higher than the subband of predetermined channel performance figure value thresholding in definite full range band.
In addition, preferably, can also be divided into following secondary submodule with submodule 42 is set:
First is provided with submodule, is used for for the non-optimum subband in the feedback frequency range, if its quality index of a channel value is not higher than predetermined channel performance figure value thresholding, then its quality index of a channel value is set to 0;
Second is provided with submodule, and the quality index of a channel value that is used for optimum subband is set to the quality index of a channel value at optimum subband place;
The 3rd is provided with submodule, and the quality index of a channel that is used for being lower than in the non-feedback frequency range subband of predetermined channel performance figure value thresholding is set to 0;
The 4th is provided with submodule, and the quality index of a channel that is used for being higher than in the full frequency band predetermined channel performance figure value thresholding is set to be higher than the quality index of a channel average of the subband of predetermined channel performance figure value thresholding;
The 5th is provided with submodule, and the quality index of a channel of Resource Block that is used for being lower than in the optimum subband quality index of a channel value of optimum subband is set to 0;
The 6th is provided with submodule, and the quality index of a channel value that is used for each Resource Block in the non-optimum subband is set to the quality index of a channel value of non-optimum subband.
Feedback module 32 is connected to constructing module 30, is used for the information to the CQI of transmitter feedback configuration.
As shown in Figure 4, in the middle of the preferred embodiments of the present invention, receiver can further include: module 44 is set, is connected to constructing module 30, be used for being provided with according to system bandwidth the number of the optimum subband in the feedback frequency range.
In sum, by means of technical scheme of the present invention, through improvement to the CQI feedback method; Increased feedback information, solved CQI feedback information inaccuracy, thereby made transmitter when scheduling, produce problem than mistake; Can improve the accuracy of feedback; Make transmitter to dispatch, thereby improve throughput of system effectively, improve systematic function with reference to accurate more feedback information.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a channel quality index feedback method is characterized in that, comprising:
Receiver structure quality index of a channel information; And in said quality index of a channel information, carry the following information of obtaining in advance at least: be lower than the subband corresponding channel quality index average that is higher than said predetermined channel performance figure value thresholding in the Resource Block corresponding position information that is lower than the quality index of a channel average of said optimum subband in the subband corresponding position information of predetermined channel performance figure value thresholding, the said optimum subband, the full range band in non-optimum subband corresponding position information in optimum subband corresponding position information in the feedback frequency range and quality index of a channel value, the said feedback frequency range and the non-feedback frequency range; Wherein, said quality index of a channel value is the quality index of a channel average of each Resource Block in the subband;
Said receiver is to the said quality index of a channel information of transmitter feedback configuration.
2. method according to claim 1 is characterized in that, before said receiver was constructed said quality index of a channel information, said method also comprised:
Confirm feedback frequency range and non-feedback frequency range in the said full range band;
For each subband, confirm the quality index of a channel value of subband, wherein, the quality index of a channel value of said subband is the quality index of a channel average of each Resource Block in the said subband;
Confirm the position of said optimum subband and the quality index of a channel value of said optimum subband;
Confirm to be lower than in the said optimum subband position of the Resource Block of its quality index of a channel value;
Confirm said predetermined channel performance figure value thresholding;
Confirm to be lower than in the said non-feedback frequency range subband position of said predetermined channel performance figure value thresholding;
Confirm the quality index of a channel average that is higher than the subband position of said predetermined channel performance figure value thresholding in the said full range band and is higher than the subband of said predetermined channel performance figure value thresholding.
3. method according to claim 2 is characterized in that, said receiver is constructed said quality index of a channel information processing and comprised:
For the non-optimum subband in the said feedback frequency range, if its quality index of a channel value is not higher than said predetermined channel performance figure value thresholding, then its quality index of a channel value is set to 0;
The quality index of a channel value of the said optimum subband of said receiver is set to the quality index of a channel value at said optimum subband place;
The quality index of a channel that is lower than the subband of said predetermined channel performance figure value thresholding in the said non-feedback frequency range is set to 0;
The quality index of a channel that is higher than said predetermined channel performance figure value thresholding in the said full frequency band is set to the said quality index of a channel average that is higher than the subband of said predetermined channel performance figure value thresholding;
The quality index of a channel of Resource Block that is lower than the quality index of a channel value of said optimum subband in the said optimum subband is set to 0;
The quality index of a channel value of each Resource Block in the said non-optimum subband is set to the quality index of a channel value of said non-optimum subband.
4. method according to claim 1 and 2; It is characterized in that; Said predetermined channel performance figure value thresholding is that the quality index of a channel average of all subbands deducts predetermined value in the said full frequency band, and wherein, said predetermined value be greater than zero and less than the positive integer of said quality index of a channel average.
5. method according to claim 1 and 2 is characterized in that, before said receiver is constructed, further comprises:
Said receiver is provided with the number of the optimum subband in the said feedback frequency range according to system bandwidth.
6. a receiver is characterized in that, comprising:
Constructing module; Be used to construct quality index of a channel information; In said quality index of a channel information, carry the following information of obtaining in advance at least: be lower than the subband corresponding channel quality index average that is higher than said predetermined channel performance figure value thresholding in the Resource Block corresponding position information that is lower than the quality index of a channel average of said optimum subband in the subband corresponding position information of predetermined channel performance figure value thresholding, the said optimum subband, the full range band in optimum subband corresponding position information and quality index of a channel value, the non-optimum subband corresponding position information in the said feedback frequency range and the non-feedback frequency range of feedback in the frequency range; Wherein, said quality index of a channel value is the quality index of a channel average of each Resource Block in the subband;
Feedback module is used for the said quality index of a channel information to the transmitter feedback configuration.
7. receiver according to claim 6 is characterized in that, said constructing module further comprises:
First confirms submodule, is used for confirming feedback frequency range and the non-feedback frequency range in the said full range band;
Second confirms submodule, is used for for each subband, confirms the quality index of a channel value of subband, and wherein, the quality index of a channel value of said subband is the quality index of a channel average of each Resource Block in the said subband;
The 3rd confirms submodule, is used for confirming the position of said optimum subband and the quality index of a channel value of said optimum subband;
The 4th confirms submodule, is used for confirming to be lower than in the said optimum subband position of the Resource Block of its quality index of a channel value;
The 5th confirms submodule, is used for confirming said predetermined channel performance figure value thresholding;
The 6th confirms submodule, is used for confirming to be lower than in the said non-feedback frequency range subband position of said predetermined channel performance figure value thresholding;
The 7th confirms submodule, is used for the quality index of a channel average that is higher than the subband position of said predetermined channel performance figure value thresholding and is higher than the subband of said predetermined channel performance figure value thresholding in definite said full range band.
8. receiver according to claim 7 is characterized in that, said constructing module further comprises:
First is provided with submodule, is used for for the non-optimum subband in the said feedback frequency range, if its quality index of a channel value is not higher than said predetermined channel performance figure value thresholding, then its quality index of a channel value is set to 0;
Second is provided with submodule, and the quality index of a channel value that is used for said optimum subband is set to the quality index of a channel value at said optimum subband place;
The 3rd is provided with submodule, and the quality index of a channel that is used for being lower than in the said non-feedback frequency range subband of said predetermined channel performance figure value thresholding is set to 0;
The 4th is provided with submodule, and the quality index of a channel that is used for being higher than in the said full frequency band said predetermined channel performance figure value thresholding is set to the said quality index of a channel average that is higher than the subband of said predetermined channel performance figure value thresholding;
The 5th is provided with submodule, and the quality index of a channel of Resource Block that is used for being lower than in the said optimum subband quality index of a channel value of said optimum subband is set to 0;
The 6th is provided with submodule, and the quality index of a channel value that is used for each Resource Block in the said non-optimum subband is set to the quality index of a channel value of said non-optimum subband.
9. receiver according to claim 8 is characterized in that, said receiver further comprises:
Module is set, is used for being provided with the number of the optimum subband in the said feedback frequency range according to system bandwidth.
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