CN103475450A - Downlink adaptive modulation and coding method and device - Google Patents

Downlink adaptive modulation and coding method and device Download PDF

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CN103475450A
CN103475450A CN2013103863304A CN201310386330A CN103475450A CN 103475450 A CN103475450 A CN 103475450A CN 2013103863304 A CN2013103863304 A CN 2013103863304A CN 201310386330 A CN201310386330 A CN 201310386330A CN 103475450 A CN103475450 A CN 103475450A
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cqi
neighbor cell
ecinr
subband
community
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CN103475450B (en
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阙程晟
蒋培刚
徐波
王智鹰
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Huawei Technologies Co Ltd
Shanghai Huawei Technologies Co Ltd
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Shanghai Huawei Technologies Co Ltd
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Abstract

The embodiment of the invention discloses a downlink adaptive modulation and coding method and device which are used for more accurately scheduling a downlink modulation and coding scheme. The downlink adaptive modulation and coding method comprises the steps of acquiring a channel quality indicator fed back by each terminal in a cell; acquiring historical scheduling information recorded by an adjacent cell of the cell; according to the historical scheduling information, classifying the channel quality indicators according to different interference modes of the adjacent cell; calculating a compensation value of the channel quality indicator between every two different interference modes and types; acquiring the current interference modes of all the adjacent cells; respectively compensating the channel quality indicators by utilizing the compensation values of the channel quality indicators corresponding to the types of the current interference modes of all the adjacent cells to schedule the downlink modulation and coding scheme.

Description

A kind of method of descending self-adapting modulating-coding and device
Technical field
The present invention relates to communication technical field, especially relate to method and the device of a kind of descending self-adapting modulating-coding (AMC, Adaptive Modulation and Coding).
Background technology
Generally, base station scheduling Corticofugal Modulation of Somatosensory encoding scheme (MCS, Modulation Coding Scheme) is exactly according to user terminal (UE, User Equipment) channel quality of feedback indication (CQI, Channel Quality Indicator) adds the outer shroud link circuit self-adapting.
Normally, base station is when dispatching uplink MCS, can pass through upstream detection pilot frequency (as the sounding reference signal (SRS, Sounding reference signal) in Long Term Evolution (LTE, Long Term Evolution)) and estimate the uplink interference from each terminal.If the schedule information of some adjacent areas can be known in base station, just can reconstruct interference matrix, for CQI, estimate, but the method is only applicable to uplink scheduling, is not suitable for descending scheduling; In time division duplex (TDD, Time Division Duplexing) system, can utilize the up-downgoing reciprocity property of channel, estimate descending interference by upstream detection pilot frequency (as the SRS in LTE).If the schedule information of some adjacent areas can be known in base station, just can reconstruct interference matrix, for CQI, estimate, but the method is only applicable to the TDD system, is not suitable for Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplexing) system; These two kinds of methods all are limited to the expense of detecting pilot frequency, and the method that is applicable to descending scheduling also is limited to the ability of terminal, and such as the sending out a port number and may be less than the receipts port number of terminal, base station just can only obtain partial channel knowledge by channel reciprocity so.
Summary of the invention
The embodiment of the present invention provides a kind of method and device of descending self-adapting modulating-coding, for dispatching downlink Modulation and Coding Scheme MCS more accurately.
In view of this, first aspect present invention provides a kind of method of descending self-adapting modulating-coding, wherein, can comprise:
Obtain the channel quality indicator (CQI) of each terminal feedback in this community;
Obtain the historical schedule information of this community neighbor cell record;
According to described historical schedule information, the conflicting modes that described CQI is different according to neighbor cell are classified;
Calculate every two disturbance mode classifications CQI offset each other;
Obtain the conflicting mode of current each neighbor cell;
Utilize the affiliated CQI offset corresponding to classification of conflicting mode of current each neighbor cell to compensate respectively described CQI, with dispatching downlink Modulation and Coding Scheme MCS.
In the first of first aspect, in possible implementation, the described CQI that obtains each terminal feedback in this community comprises full band CQI or the subband CQI that obtains each terminal feedback in this community.
The possible implementation in conjunction with the first of first aspect, at the second, in possible implementation, the described historical schedule information of obtaining this community neighbor cell record comprises obtains the historical schedule information that X neighbor cell records, and described X is positive integer;
According to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: do not have neighbor cell interference entirely with CQI or subband CQI, be less than or equal to x neighbor cell interference entirely with CQI or subband CQI, the full band CQI that is greater than x neighbor cell interference or subband CQI, a full band portion Resource Block or a sub-band portion Resource Block, one or more neighbor cell interference are arranged, the part Resource Block does not have the CQI of neighbor cell interference, wherein, described x is for being more than or equal to 1, and is less than the integer of X.
The possible implementation in conjunction with the second of first aspect, at the third, in possible implementation, the CQI that obtains each terminal feedback in this community if described is the subband CQI that obtains each terminal feedback in this community;
The described historical schedule information of obtaining this community neighbor cell record comprises the historical schedule information of obtaining first-phase adjacent cell and second-phase adjacent cell record;
According to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: the subband CQI that there is no neighbor cell interference, the subband CQI that only has described first-phase adjacent cell to disturb, the subband CQI that only has described second-phase adjacent cell to disturb, the subband CQI that described first-phase adjacent cell and described the second neighbor cell interference are arranged simultaneously, a sub-band portion Resource Block has described first-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference, a sub-band portion Resource Block has described second-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation, every two the disturbance mode classifications of described calculating CQI offset each other comprises:
Be directed to the CQI of every two disturbance mode classifications, calculate two adjacent sub-bands, the CQI difference obtained at synchronization; Described CQI difference is carried out to filtering; Filtered CQI difference is defined as to the disturbance mode classification CQI offset each other of two neighbor cells.
In conjunction with the third possible implementation of first aspect, in the 5th kind of possible implementation, every two the disturbance mode classifications of described calculating CQI offset each other comprises:
Obtaining the useful signal interference-to-noise ratio ECINR that k subband of terminal m subframe of n feedback cycle measure is ECINR n, m, k, wherein, described n, m, k are positive integer;
According to feedback cycle, be M subframe, the quantification CQI that obtains k subband of n feedback cycle feedback of terminal is CQI n,k, the ECINR before corresponding quantification is:
Figure BDA00003743520400031
wherein, described M is positive integer;
By described ECINR n, m, kthe conflicting modes different according to described neighbor cell are classified, and obtain ECINR n, k, i, i=1,2,3,4 ... x, wherein, described ECINR n, m, kthe class categories number equal the class categories number of described CQI, described x is positive integer;
According to the historical schedule information of neighbor cell record, by described ECINR n, m, kcorrespond to described ECINR n, k, iupper, obtain
Figure BDA00003743520400032
wherein, d n, k, ifor positive integer, mean ECINR n, k, inumber;
According to the value of subband and feedback cycle, list J equation equation group, the ECINR that obtains the subband that j equation equation group obtain is ECINR n, j, i, described j is less than J, and described j, J are positive integer;
By ECINR n, j, iquantize to CQI, obtain CQI n, j, iand the difference between COI of all categories;
Difference between the COI of all categories that described J equation equation group obtained is done respectively on average, obtains every two disturbance mode classifications CQI offset each other.
Second aspect present invention provides a kind of device of descending self-adapting modulating-coding, wherein, can comprise:
Acquisition module, for obtaining the channel quality indicator (CQI) of this each terminal feedback of community;
Described acquisition module, also for obtaining the historical schedule information of this community neighbor cell record;
Sort module, for according to described historical schedule information, the conflicting modes that described CQI is different according to neighbor cell are classified;
Computing module, calculate every two disturbance mode classifications CQI offset each other;
Described acquisition module, also for obtaining the conflicting mode of current each neighbor cell;
Compensating module, the CQI offset corresponding for classification under the conflicting mode that utilizes current each neighbor cell compensates respectively described CQI, with dispatching downlink Modulation and Coding Scheme MCS.
In the first of second aspect, in possible implementation, described acquisition module, comprise full band CQI or the subband CQI that obtains each terminal feedback in this community for the CQI that obtains this each terminal feedback of community.
The possible implementation in conjunction with the first of second aspect, at the second in possible implementation, described acquisition module comprises for the historical schedule information of obtaining this community neighbor cell record the historical schedule information of obtaining X neighbor cell record, and described X is positive integer;
According to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: do not have neighbor cell interference entirely with CQI or subband CQI, be less than or equal to x neighbor cell interference entirely with CQI or subband CQI, the full band CQI that is greater than x neighbor cell interference or subband CQI, a full band portion Resource Block or a sub-band portion Resource Block, one or more neighbor cell interference are arranged, the part Resource Block does not have the CQI of neighbor cell interference, wherein, described x is for being more than or equal to 1, and is less than the integer of X.
The possible implementation in conjunction with the second of second aspect, at the third in possible implementation, if described acquisition module is the subband CQI that obtains each terminal feedback in this community for the CQI that obtains this each terminal feedback of community; The described historical schedule information of obtaining this community neighbor cell record comprises the historical schedule information of obtaining first-phase adjacent cell and second-phase adjacent cell record;
Described sort module is for according to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: the subband CQI that there is no neighbor cell interference, the subband CQI that only has described first-phase adjacent cell to disturb, the subband CQI that only has described second-phase adjacent cell to disturb, the subband CQI that described first-phase adjacent cell and described the second neighbor cell interference are arranged simultaneously, a sub-band portion Resource Block has described first-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference, a sub-band portion Resource Block has described second-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference.
In conjunction with the third possible implementation of second aspect, in the 4th kind of possible implementation, described computing module is used for:
Be directed to the CQI of every two disturbance mode classifications, calculate two adjacent sub-bands, the CQI difference obtained at synchronization; Described CQI difference is carried out to filtering; Filtered CQI difference is defined as to the disturbance mode classification CQI offset each other of two neighbor cells.
In conjunction with the third possible implementation of second aspect, in the 5th kind of possible implementation, described computing module is used for:
Obtaining the useful signal interference-to-noise ratio ECINR that k subband of terminal m subframe of n feedback cycle measure is ECINR n, m, k, wherein, described n, m, k are positive integer;
According to feedback cycle, be M subframe, the quantification CQI that obtains k subband of n feedback cycle feedback of terminal is CQI n,k, the ECINR before corresponding quantification is:
Figure BDA00003743520400051
wherein, described M is positive integer;
By described ECINR n, m, kthe conflicting modes different according to described neighbor cell are classified, and obtain ECINR n, k, i, i=1,2,3,4 ... x, wherein, described ECINR n, m, kthe class categories number equal the class categories number of described CQI, described x is positive integer;
According to the historical schedule information of neighbor cell record, by described ECINR n, m, kcorrespond to described ECINR n, k, iupper, obtain
Figure BDA00003743520400052
wherein, d n, k, ifor positive integer, mean ECINR n, k, inumber;
According to the value of subband and feedback cycle, list J equation equation group, the ECINR that obtains the subband that j equation equation group obtain is ECINR n, j, i, described j is less than J, and described j, J are positive integer;
By ECINR n, j, iquantize to CQI, obtain CQI n, j, iand the difference between COI of all categories;
Difference between the COI of all categories that described J equation equation group obtained is done respectively on average, obtains every two disturbance mode classifications CQI offset each other.
As can be seen from the above technical solutions, method and the device of a kind of descending self-adapting modulating-coding that the embodiment of the present invention provides, have the following advantages: according to the historical schedule information of the record of neighbor cell, the CQI of terminal feedback is classified according to the disturbance mode, and asked for disturbance mode classification CQI offset between any two; According to the scheduling situation of current each neighbor cell, the CQI of terminal feedback is compensated, for descending MCS scheduling; In conjunction with the CQI of the historical dispatching record of neighbor cell and terminal feedback, on neighbor cell interference, impact is predicted, more accurately dispatching downlink MCS.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, the accompanying drawing that below will describe required use to embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic flow sheet of the method for a kind of descending self-adapting modulating-coding that Fig. 1 provides for the embodiment of the present invention;
Another schematic flow sheet of the method for the descending self-adapting modulating-coding that Fig. 2 provides for the embodiment of the present invention;
Another schematic flow sheet of the method for the descending self-adapting modulating-coding that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the device of a kind of descending self-adapting modulating-coding that Fig. 4 provides for the embodiment of the present invention;
Another structural representation of the device of the descending self-adapting modulating-coding that Fig. 5 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of method and device of descending self-adapting modulating-coding, for dispatching downlink Modulation and Coding Scheme MCS more accurately.
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 all other embodiment that obtain under the creative work prerequisite, belong to the scope of protection of the invention.
Below be elaborated respectively.
Please refer to Fig. 1, the schematic flow sheet of the method for a kind of descending self-adapting modulating-coding that Fig. 1 provides for the embodiment of the present invention, wherein, described method comprises:
Step 101, obtain the channel quality indicator (CQI) of each terminal feedback in this community;
Be understandable that, the executive agent of this method embodiment can be a kind of communicator, this communicator can be base station, described base station comprises several communities, concerning some communities, can be described as this community or main plot in the present embodiment, the community of same base station or other base station can be described as this community neighbor cell (being called for short neighbor cell or adjacent area in the present embodiment); The method that is described descending self-adapting modulating-coding can be thought to be processed by the main plot base station side.
The ，Zhe community obtains in the channel quality indicator (CQI) of terminal feedback in addition, and described terminal can be each terminal of main plot service.Described channel quality indicator (CQI) can be also subband CQI for full band CQI, no longer specifically limits herein.
Step 102, obtain the historical schedule information of this community neighbor cell record;
Be understandable that, the neighbor cell record that described historical schedule information can be same base, can be also the neighbor cell record of different base station, is not construed as limiting herein; Wherein, the historical schedule information of described record can refer to the resource scheduling information of historical record, such as whether having dispatched certain Resource Block, or transmitting power during this resource block scheduling etc.
Step 103, according to described historical schedule information, the conflicting modes that described CQI is different according to neighbor cell are classified;
Further, the historical schedule information of obtaining this community neighbor cell record can comprise the historical schedule information of obtaining X neighbor cell record, and described X is positive integer; According to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies can comprise:
Do not have neighbor cell interference entirely with CQI or subband CQI, be less than or equal to x neighbor cell interference entirely with CQI or subband CQI, the full band CQI that is greater than x neighbor cell interference or subband CQI, a full band portion Resource Block or a sub-band portion Resource Block, one or more neighbor cell interference are arranged, the part Resource Block does not have the CQI of neighbor cell interference, wherein, described x is for being more than or equal to 1, and is less than the integer of X.
Step 104, calculate every two disturbance mode classifications CQI offset each other;
Be understandable that, because the scheduling meeting of neighbor cell affects the value of CQI feedback, therefore according to the historical schedule information of neighbor cell, by CQI, the conflicting mode different according to neighbor cell classified and calculated CQI offset between any two of all categories, can make to dispatch MCS more accurate.
Step 105, obtain the conflicting mode of current each neighbor cell;
Step 106, utilize the conflicting mode of current each neighbor cell under CQI offset corresponding to classification described CQI is compensated respectively, with dispatching downlink Modulation and Coding Scheme MCS.
Utilize corresponding CQI offset to compensate respectively described CQI, with the interference that has overcome neighbor cell and the impact of transferring the CQI on feeding back.
From the above, the method of a kind of descending self-adapting modulating-coding that the embodiment of the present invention provides, according to the historical schedule information of the record of neighbor cell, the CQI of terminal feedback is classified according to the disturbance mode, and asked for disturbance mode classification CQI offset between any two; According to the scheduling situation of current each neighbor cell, the CQI of terminal feedback is compensated, for descending MCS scheduling; In conjunction with the CQI of the historical dispatching record of neighbor cell and terminal feedback, on neighbor cell interference, impact is predicted, more accurately dispatching downlink MCS.
Please refer to Fig. 2, another schematic flow sheet of the method for the descending self-adapting modulating-coding that Fig. 2 provides for the embodiment of the present invention, identical with a upper embodiment, described method executive agent can be a kind of communicator, this communicator can be base station; In this embodiment of the invention, described method is processed by the main plot base station side, and the LTE system (comprising LTE TDD and LTE FDD) of take describes described method as example: suppose that main plot has obtained the historical schedule informations (being that described X is 2) of two neighbor cell records, described two neighbor cells comprise first-phase adjacent cell and second-phase adjacent cell.Described method comprises:
Step 201, obtain the subband CQI of each terminal feedback in this community;
Step 202, obtain the historical schedule information of first-phase adjacent cell and second-phase adjacent cell record;
Step 203, according to described historical schedule information, the described subband CQI conflicting mode different according to neighbor cell classified;
In conjunction with the schedule information of neighbor cell, the subband CQI of terminal feedback is classified; Be understandable that, the schedule information of described neighbor cell can comprise the conflicting mode that neighbor cell is different.
In the present embodiment, after the subband CQI conflicting mode different according to neighbor cell of feedback classified, thereby the different classes of CQI obtained can comprise:
(1) there is no the subband CQI of neighbor cell interference; Be that subband CQI had not both had first-phase adjacent cell and the second neighbor cell interference, also there is no other neighbor cell interference; In this embodiment, the CQI of k subband while there is no neighbor cell interference means that with CQI (k) _ 00 wherein k is positive integer, means index, as gone since 0 or 1 positive integer;
(2) the subband CQI that only has described first-phase adjacent cell to disturb; In this embodiment, while only having described first-phase adjacent cell to disturb, the CQI of k subband, mean with CQI (k) _ 10;
(3) the subband CQI that only has described second-phase adjacent cell to disturb; In this embodiment, while only having described second-phase adjacent cell to disturb, the CQI of k subband, mean with CQI (k) _ 01;
(4) the subband CQI of described first-phase adjacent cell and described the second neighbor cell interference is arranged simultaneously; In this embodiment, the CQI of k subband when described first-phase adjacent cell and described the second neighbor cell interference are arranged simultaneously, mean with CQI (k) _ 11;
In addition, in the present embodiment, CQI can also be divided into a sub-band portion Resource Block (RB, resource block) neighbor cell interference, and part does not have noisy situation, for this classification, can specifically be divided into:
(5) sub-band portion Resource Block have described first-phase adjacent cell to disturb, and the part Resource Block does not have the CQI of neighbor cell interference, with CQI (k) _ half_10, means;
(6) sub-band portion Resource Block have described second-phase adjacent cell to disturb, and the part Resource Block does not have the CQI of neighbor cell interference, with CQI (k) _ half_01, means.
Take LTE20M as example, resource is distributed a Resource Block group (RBG, Resource block group) be 4 RB, subband CQI feedback granularity is 8RB, can be divided into two classes, one class is the interference that noiseless, the another 4RB of 4RB has the first-phase adjacent cell, the interference that the another kind of 4RB of being is noiseless, another 4RB has the second-phase adjacent cell.
Step 204, calculate every two disturbance mode classifications CQI offset each other;
In the embodiment of the present invention, described step 204 can specifically comprise:
S2041, be directed to the CQI of every two disturbance mode classifications, calculate two adjacent sub-bands, the CQI difference obtained at synchronization;
S2042, described CQI difference is carried out to filtering;
S2043, filtered CQI difference is defined as to the disturbance mode classification CQI offset each other of two neighbor cells.
For convenient, understand, asking for as example of the CQI offset of below take between the first kind (i.e. (1)) and the 4th class (i.e. (4)), explain the step of asking for of CQI offset:
Suppose that two adjacent subbands are respectively k and k+1, the CQI difference constantly obtained at n can be expressed as Delta (n, k)=CQI (k, n) _ 00-CQI (k+1, n) _ 11, and wherein, described n is positive integer; Secondly, CQI difference Delta (n, k) is carried out to filtering (can be that upper reaching on different sub-band of time carried out filtering to it), obtain Delta_00_11; Finally, Delta_00_11 is defined as to two neighbor cells and all dispatches the CQI offset while all not dispatching with two neighbor cells.
Step 205, obtain the conflicting mode of current each neighbor cell;
Step 206, utilize the conflicting mode of current each neighbor cell under CQI offset corresponding to classification described CQI is compensated respectively, with dispatching downlink Modulation and Coding Scheme MCS.
For example, if the CQI of k subband of terminal feedback is CQI (k) _ 11, be categorized as the 4th class that step 203 is described, the subband CQI of described first-phase adjacent cell and described the second neighbor cell interference is arranged simultaneously; And, the conflicting mode of current each neighbor cell got is engraved on k subband the interference do not had with the adjacent area, station while being current scheduling, belong to the first kind that step 203 is described, CQI offset corresponding to this classification is Delta_00_11, by the upper Delta_00_11 of the CQI of terminal feedback (k) _ 11 compensation, for the descending MCS scheduling of current time.
From the above, the method of a kind of descending self-adapting modulating-coding that the embodiment of the present invention provides, according to the historical schedule information of the record of neighbor cell, the CQI of terminal feedback is classified according to the disturbance mode, and asked for disturbance mode classification CQI offset between any two; According to the scheduling situation of current each neighbor cell, the CQI of terminal feedback is compensated, for descending MCS scheduling; In conjunction with the CQI of the historical dispatching record of neighbor cell and terminal feedback, on neighbor cell interference, impact is predicted, more accurately dispatching downlink MCS.
Please refer to Fig. 3, another schematic flow sheet of the method for the descending self-adapting modulating-coding that Fig. 3 provides for the embodiment of the present invention; Identical with a upper embodiment, described method can be processed by the main plot base station side, the LTE system (comprising LTE TDD and LTE FDD) of take is example, suppose that main plot has obtained the historical schedule information (being that described X is 2) of two neighbor cell records, described two neighbor cells comprise first-phase adjacent cell and second-phase adjacent cell.Be different from an embodiment, the present embodiment calculates in the process of every two disturbance mode classifications CQI offset each other, does not need the cooperation of base station scheduling, but obtains the CQI offset by the mode of solving an equation.Described method comprises:
Step 301, obtain the subband CQI of each terminal feedback in this community;
Step 302, obtain the historical schedule information of first-phase adjacent cell and second-phase adjacent cell record;
Step 303, according to described historical schedule information, the described subband CQI conflicting mode different according to neighbor cell classified;
Be understandable that, described subband CQI can be divided into six classes according to the mode classification in a upper embodiment, in the present embodiment, step 301 to the detailed process of step 303 can be carried out specific implementation with reference to the step 201 in a upper embodiment to the content of step 203, no longer specifically sets forth herein.
Step 304, calculate every two disturbance mode classifications CQI offset each other;
In the embodiment of the present invention, described step 304 can specifically comprise:
S3041, to obtain the useful signal interference-to-noise ratio (ECINR, Effective CINR) that k subband of terminal m subframe of n feedback cycle measure be ECINR n, m, k, wherein, described n, m, k are positive integer, mean index, for example can get since 0 or 1 positive integer;
S3042, according to feedback cycle, be M subframe, the quantification CQI that obtains k subband of n feedback cycle feedback of terminal is CQI n,k, the ECINR before corresponding quantification is:
Figure BDA00003743520400101
wherein, described M is positive integer;
Be understandable that, the ECINR before described quantification obtains as mean value calculation the ECINR in M subframe.
S3043, by described ECINR n, m, kthe conflicting modes different according to described neighbor cell are classified, and obtain ECINR n, k, i, i=1,2,3,4 ... x, wherein, described ECINR n, m, kthe class categories number equal the class categories number of described CQI, described x is positive integer;
That is to say, by described ECINR n, m, kbe divided into six large classes according to the classify mode of CQI of a upper embodiment; Be that described x is 6, available ECINR n, k, i, i=1,2,3,4,5,6 mean.
S3044, the historical schedule information recorded according to neighbor cell, by described ECINR n, m, kcorrespond to described ECINR n, k, iupper, obtain
Figure BDA00003743520400111
wherein, d n, k, ifor positive integer, mean ECINR n, k, inumber;
Supposing in a feedback cycle that channel is gradual (or is considered as ECINR n, m, kalso can do on average), according to the historical schedule information with station neighbor cell record, by ECINR n, m, kcorrespond to ECINR n, k, iupper, if total d n, k, iindividual ECINR n, k, i, by formula one, obtain formula two, if x equals at 6 o'clock, substitution formula two can obtain:
Figure BDA00003743520400112
S3045, according to the value of subband and feedback cycle, list J equation equation group, the ECINR that obtains the subband that j equation equation group obtain is ECINR n, j, i, described j is less than J, and described j, J are positive integer;
For example: if for formula three, ECINR n,k, d n, k, iwith M be known, if will solve ECINR n, j, i, needing to list equations different more than six can solve.Can equation of row (formula two) due to a subband CQI who feeds back in a feedback cycle, 2 feedback cycles of 3 subband * mean that 6 subband COI of adjacent two feedback cycles, 3 subbands can list the equation of 6 similar formula two so; If suppose the ECINR of 2 feedback cycles of adjacent 3 subband * n, k, iapproximately equal, list the equation equation group; If encounter two listed equation equation group, equate, that just on average obtains respectively an equation by two formula the right and lefts, needs the equation of new subband of row or feedback cycle again, reaches unknown number and equation and equates to solve unknown number.Such a equation equation group is collectively referred to as j equation equation group, and the ECINR of the subband that j equation equation group obtained is expressed as ECINR n, j, i.
S3046, by ECINR n, j, iquantize to CQI, obtain CQI n, j, iand the difference between COI of all categories;
Difference between S3047, COI of all categories that described J equation equation group obtained is done respectively on average, obtains every two disturbance mode classifications CQI offset each other.
Step 305, obtain the conflicting mode of current each neighbor cell;
Step 306, utilize the conflicting mode of current each neighbor cell under CQI offset corresponding to classification described CQI is compensated respectively, with dispatching downlink Modulation and Coding Scheme MCS.
Be understandable that, in the present embodiment, step 305 to the detailed process of step 306 can be carried out specific implementation with reference to the step 205 in a upper embodiment to the content of step 206, no longer specifically sets forth herein.
From the above, the method of a kind of descending self-adapting modulating-coding that the embodiment of the present invention provides, according to the historical schedule information of the record of neighbor cell, the CQI of terminal feedback is classified according to the disturbance mode, and asked for disturbance mode classification CQI offset between any two; According to the scheduling situation of current each neighbor cell, the CQI of terminal feedback is compensated, for descending MCS scheduling; In conjunction with the CQI of the historical dispatching record of neighbor cell and terminal feedback, on neighbor cell interference, impact is predicted, more accurately dispatching downlink MCS.
For ease of the method for the descending self-adapting modulating-coding that better the enforcement embodiment of the present invention provides, the embodiment of the present invention also provides a kind of descending self-adapting modulating-coding device based on said method.Wherein the implication of noun is with identical in said method embodiment, the explanation of specific implementation details in can reference method embodiment.
Please refer to Fig. 4, the structural representation of the device of a kind of descending self-adapting modulating-coding that Fig. 4 provides for the embodiment of the present invention, wherein, described device can be base station, and described device can comprise: acquisition module 401, sort module 402, computing module 403, compensating module 404;
Wherein, described acquisition module 401, for obtaining the channel quality indicator (CQI) of this each terminal feedback of community;
Be understandable that the ，Zhe community obtains in the channel quality indicator (CQI) of terminal feedback, described terminal can be each terminal of main plot service.
Described acquisition module 401, also for obtaining the historical schedule information of this community neighbor cell record;
In present embodiment, the neighbor cell record that described historical schedule information can be same base, can be also the neighbor cell record of different base station, is not construed as limiting herein; Wherein, the historical schedule information of described record can refer to the resource scheduling information of historical record, such as whether having dispatched certain Resource Block, or transmitting power during this resource block scheduling etc.
Described sort module 402, for according to described historical schedule information, the conflicting modes that described CQI is different according to neighbor cell are classified;
Further, the historical schedule information that described acquisition module 401 obtains this community neighbor cell record can comprise the historical schedule information of obtaining X neighbor cell record, and described X is positive integer; The conflicting mode that sort module 402 is different according to the neighbor cell different classes of CQI obtained that classifies can comprise: do not have neighbor cell interference entirely with CQI or subband CQI, be less than or equal to x neighbor cell interference entirely with CQI or subband CQI, the full band CQI that is greater than x neighbor cell interference or subband CQI, a full band portion Resource Block or a sub-band portion Resource Block, one or more neighbor cell interference are arranged, the part Resource Block does not have the CQI of neighbor cell interference, wherein, described x is for being more than or equal to 1, and is less than the integer of X.
Described computing module 403, calculate every two disturbance mode classifications CQI offset each other;
Be understandable that, because the scheduling meeting of neighbor cell affects the value of CQI feedback, therefore according to the historical schedule information of neighbor cell, by CQI, the conflicting mode different according to neighbor cell classified and calculated CQI offset between any two of all categories, can make to dispatch MCS more accurate.
Described acquisition module 401, also for obtaining the conflicting mode of current each neighbor cell;
Described compensating module 404, the CQI offset corresponding for classification under the conflicting mode that utilizes current each neighbor cell compensates respectively described CQI, with dispatching downlink Modulation and Coding Scheme MCS.
Utilize corresponding CQI offset to compensate respectively described CQI, with the interference that has overcome neighbor cell and the impact of transferring the CQI on feeding back.
From the above, the device of a kind of descending self-adapting modulating-coding that the embodiment of the present invention provides, according to the historical schedule information of the record of neighbor cell, the CQI of terminal feedback is classified according to the disturbance mode, and asked for disturbance mode classification CQI offset between any two; According to the scheduling situation of current each neighbor cell, the CQI of terminal feedback is compensated, for descending MCS scheduling; In conjunction with the CQI of the historical dispatching record of neighbor cell and terminal feedback, on neighbor cell interference, impact is predicted, more accurately dispatching downlink MCS.
Alternatively, described acquisition module 401, comprise full band CQI or the subband CQI that obtains each terminal feedback in this community for the CQI that obtains this each terminal feedback of community;
Further alternatively, if described acquisition module 401 is the subband CQI that obtains each terminal feedback in this community for the CQI that obtains this each terminal feedback of community; The described historical schedule information of obtaining this community neighbor cell record comprises the historical schedule information of obtaining first-phase adjacent cell and second-phase adjacent cell record;
Described sort module 402 comprises for the conflicting mode different according to the neighbor cell different classes of CQI obtained that classifies: the subband CQI that there is no neighbor cell interference, the subband CQI that only has described first-phase adjacent cell to disturb, the subband CQI that only has described second-phase adjacent cell to disturb, the subband CQI that described first-phase adjacent cell and described the second neighbor cell interference are arranged simultaneously, a sub-band portion Resource Block has described first-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference, a sub-band portion Resource Block has described second-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference.
Wherein, this six classes subband CQI can mean respectively: the CQI of k subband while there is no neighbor cell interference, with CQI (k) _ 00, mean, and wherein k is positive integer, means index, as gone since 0 or 1 positive integer; While only having described first-phase adjacent cell to disturb, the CQI of k subband, mean with CQI (k) _ 10; While only having described second-phase adjacent cell to disturb, the CQI of k subband, mean with CQI (k) _ 01; The CQI of k subband when described first-phase adjacent cell and described the second neighbor cell interference are arranged simultaneously, mean with CQI (k) _ 11; A sub-band portion Resource Block has described first-phase adjacent cell to disturb, and the part Resource Block does not have the CQI of neighbor cell interference, with CQI (k) _ half_10, means; A sub-band portion Resource Block has described second-phase adjacent cell to disturb, and the part Resource Block does not have the CQI of neighbor cell interference, with CQI (k) _ half_01, means.
In one embodiment, the classification results based on 402 couples of subband CQI of described sort module, described computing module 403 can specifically for:
Be directed to the CQI of every two disturbance mode classifications, calculate two adjacent sub-bands, the CQI difference obtained at synchronization; Described CQI difference is carried out to filtering; Filtered CQI difference is defined as to the disturbance mode classification CQI offset each other of two neighbor cells.
For convenient, understand, asking for as example of the CQI offset of below take between the first kind (i.e. (1)) and the 4th class (i.e. (4)), explain the step of asking for of CQI offset:
Suppose that two adjacent subbands are respectively k and k+1, the CQI difference constantly obtained at n can be expressed as Delta (n, k)=CQI (k, n) _ 00-CQI (k+1, n) _ 11, and wherein, described n is positive integer; Secondly, CQI difference Delta (n, k) is carried out to filtering (can be that upper reaching on different sub-band of time carried out filtering to it), obtain Delta_00_11; Finally, Delta_00_11 is defined as to two neighbor cells and all dispatches the CQI offset while all not dispatching with two neighbor cells.
In this embodiment, if the CQI of k subband of terminal feedback is CQI (k) _ 11, be categorized as the 4th class of foregoing description, the subband CQI of described first-phase adjacent cell and described the second neighbor cell interference is arranged simultaneously; And, the conflicting mode of current each neighbor cell got is engraved on k subband the interference do not had with the adjacent area, station while being current scheduling, the first kind that belongs to foregoing description, CQI offset corresponding to this classification is Delta_00_11, described compensating module 404 is for the upper Delta_00_11 of the CQI by terminal feedback (k) _ 11 compensation, for the descending MCS scheduling of current time.
In another embodiment, the classification results based on 402 couples of subband CQI of described sort module, described computing module 403 can specifically for:
Obtaining the useful signal interference-to-noise ratio ECINR that k subband of terminal m subframe of n feedback cycle measure is ECINR n, m, k, wherein, described n, m, k are positive integer, mean index, for example can get since 0 or 1 positive integer;
According to feedback cycle, be M subframe, the quantification CQI that obtains k subband of n feedback cycle feedback of terminal is CQI n,k, the ECINR before corresponding quantification is: (hereinafter to be referred as formula one), wherein, described M is positive integer; Be understandable that, the ECINR before described quantification obtains as mean value calculation the ECINR in M subframe.
By described ECINR n, m, kthe conflicting modes different according to described neighbor cell are classified, and obtain ECINR n, k, i, i=1,2,3,4 ... x, wherein, described ECINR n, m, kthe class categories number equal the class categories number of described CQI, described x is positive integer; That is to say, by described ECINR n, m, kbe divided into six large classes according to the classify mode of CQI of a upper embodiment; Be that described x is 6, available ECINR n, k, i, i=1,2,3,4,5,6 mean.
According to the historical schedule information of neighbor cell record, by described ECINR n, m, kcorrespond to described ECINR n, k, iupper, obtain
Figure BDA00003743520400152
wherein, d n, k, ifor positive integer, mean ECINR n, k, inumber;
Supposing in a feedback cycle that channel is gradual (or is considered as ECINR n, m, kalso can do on average), according to the historical schedule information with station neighbor cell record, by ECINR n, m, kcorrespond to ECINR n, k, iupper, if total d n, k, iindividual ECINR n, k, i, by formula one, obtain formula two, if x equals at 6 o'clock, substitution formula two can obtain:
Figure BDA00003743520400153
According to the value of subband and feedback cycle, list J equation equation group, the ECINR that obtains the subband that j equation equation group obtain is ECINR n, j, i, described j is less than J, and described j, J are positive integer;
For example: if for formula three, ECINR n,k, d n, k, iwith M be known, if will solve ECINR n, j, i, needing to list equations different more than six can solve.Can equation of row (formula two) due to a subband CQI who feeds back in a feedback cycle, 2 feedback cycles of 3 subband * mean that 6 subband COI of adjacent two feedback cycles, 3 subbands can list the equation of 6 similar formula two so; If suppose the ECINR of 2 feedback cycles of adjacent 3 subband * n, k, iapproximately equal, list the equation equation group; If encounter two listed equation equation group, equate, that just on average obtains respectively an equation by two formula the right and lefts, needs the equation of new subband of row or feedback cycle again, reaches unknown number and equation and equates to solve unknown number.Such a equation equation group is collectively referred to as j equation equation group, and the ECINR of the subband that j equation equation group obtained is expressed as ECINR n, j, i.
By ECINR n, j, iquantize to CQI, obtain CQI n, j, iand the difference between COI of all categories;
Difference between the COI of all categories that described J equation equation group obtained is done respectively on average, obtains every two disturbance mode classifications CQI offset each other.
Now, described compensating module 404 utilizes affiliated CQI offset corresponding to classification of the conflicting mode of current each neighbor cell to compensate respectively described CQI, with dispatching downlink Modulation and Coding Scheme MCS.Utilize corresponding CQI offset to compensate respectively described CQI, with the interference that has overcome neighbor cell and the impact of transferring the CQI on feeding back.The present embodiment calculates in the process of every two disturbance mode classifications CQI offset each other, does not need the cooperation of base station scheduling, but obtains the CQI offset by the mode of solving an equation, easier.
The those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of each modular unit in the device of foregoing description and device, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
From the above, the device of a kind of descending self-adapting modulating-coding that the embodiment of the present invention provides, according to the historical schedule information of the record of neighbor cell, the CQI of terminal feedback is classified according to the disturbance mode, and asked for disturbance mode classification CQI offset between any two; According to the scheduling situation of current each neighbor cell, the CQI of terminal feedback is compensated, for descending MCS scheduling; In conjunction with the CQI of the historical dispatching record of neighbor cell and terminal feedback, on neighbor cell interference, impact is predicted, more accurately dispatching downlink MCS.
Please refer to Fig. 5, another structural representation of device of the descending self-adapting modulating-coding that Fig. 5 provides for the embodiment of the present invention, wherein, can comprise for example CPU of at least one processor 501(, Central Processing Unit), at least one network interface or other communication interface, memory 502, with at least one communication bus, for realizing the connection communication between these devices.The executable module that described processor 501 is stored for execute store, for example computer program.Described memory 502 may comprise high-speed random access memory (RAM, Random Access Memory), also may also comprise non-unsettled memory (non-volatile memory), for example at least one magnetic disc store.Realize the communication connection between this system gateway and at least one other network element by least one network interface (can be wired or wireless), can use the Internet, wide area network, local network, metropolitan area network etc.
As shown in Figure 5, in some embodiments, in described memory 502, stored program command, program command can be carried out by processor 501, the concrete following steps of carrying out of described processor 501:
Obtain the channel quality indicator (CQI) of each terminal feedback in this community; Obtain the historical schedule information of this community neighbor cell record; According to described historical schedule information, the conflicting modes that described CQI is different according to neighbor cell are classified; Calculate every two disturbance mode classifications CQI offset each other; Obtain the conflicting mode of current each neighbor cell; Utilize the affiliated CQI offset corresponding to classification of conflicting mode of current each neighbor cell to compensate respectively described CQI, with dispatching downlink Modulation and Coding Scheme MCS.
Wherein, the CQI that obtains each terminal feedback in this community comprises full band CQI or the subband CQI that obtains each terminal feedback in this community.
Preferably, the historical schedule information that described processor 501 obtains this community neighbor cell record can comprise the historical schedule information of obtaining X neighbor cell record, and described X is positive integer; According to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: do not have neighbor cell interference entirely with CQI or subband CQI, be less than or equal to x neighbor cell interference entirely with CQI or subband CQI, the full band CQI that is greater than x neighbor cell interference or subband CQI, a full band portion Resource Block or a sub-band portion Resource Block, one or more neighbor cell interference are arranged, the part Resource Block does not have the CQI of neighbor cell interference, wherein, described x is for being more than or equal to 1, and is less than the integer of X.
Further preferably, if described processor 501 obtains the CQI of each terminal feedback in this community, be the subband CQI that obtains each terminal feedback in this community, the described historical schedule information of obtaining this community neighbor cell record comprises the historical schedule information of obtaining first-phase adjacent cell and second-phase adjacent cell record, according to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: the subband CQI that there is no neighbor cell interference, the subband CQI that only has described first-phase adjacent cell to disturb, the subband CQI that only has described second-phase adjacent cell to disturb, the subband CQI that described first-phase adjacent cell and described the second neighbor cell interference are arranged simultaneously, a sub-band portion Resource Block has described first-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference, a sub-band portion Resource Block has described second-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference.
In one embodiment, described processor 501 calculates every two disturbance mode classifications CQI offset each other and can comprise: the CQI that is directed to every two disturbance mode classifications, calculate two adjacent sub-bands, the CQI difference obtained at synchronization; Described CQI difference is carried out to filtering; Filtered CQI difference is defined as to the disturbance mode classification CQI offset each other of two neighbor cells.
In another embodiment, described processor 501 calculates every two disturbance mode classifications CQI offset each other and can comprise: obtaining the useful signal interference-to-noise ratio ECINR that k subband of terminal m subframe of n feedback cycle measure is ECINR n, m, k, wherein, described n, m, k are positive integer; According to feedback cycle, be M subframe, the quantification CQI that obtains k subband of n feedback cycle feedback of terminal is CQI n,k, the ECINR before corresponding quantification is:
Figure BDA00003743520400181
wherein, described M is positive integer; By described ECINR n, m, kthe conflicting modes different according to described neighbor cell are classified, and obtain ECINR n, k, i, i=1,2,3,4 ... x, wherein, described ECINR n, m, kthe class categories number equal the class categories number of described CQI, described x is positive integer; According to the historical schedule information of neighbor cell record, by described ECINR n, m, kcorrespond to described ECINR n, k, iupper, obtain
Figure BDA00003743520400182
wherein, d n, k, ifor positive integer, mean ECINR n, k, inumber; According to the value of subband and feedback cycle, list J equation equation group, the ECINR that obtains the subband that j equation equation group obtain is ECINR n, j, i, described j is less than J, and described j, J are positive integer; By ECINR n, j, iquantize to CQI, obtain CQI n, j, iand the difference between COI of all categories; Difference between the COI of all categories that described J equation equation group obtained is done respectively on average, obtains every two disturbance mode classifications CQI offset each other.
The those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of processor 501 in the device of foregoing description, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
From the above, the device of a kind of descending self-adapting modulating-coding that the embodiment of the present invention provides, according to the historical schedule information of the record of neighbor cell, the CQI of terminal feedback is classified according to the disturbance mode, and asked for disturbance mode classification CQI offset between any two; According to the scheduling situation of current each neighbor cell, the CQI of terminal feedback is compensated, for descending MCS scheduling; In conjunction with the CQI of the historical dispatching record of neighbor cell and terminal feedback, on neighbor cell interference, impact is predicted, more accurately dispatching downlink MCS.
The those skilled in the art can be well understood to, for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
In the several embodiment that provide in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual the realization, other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as the separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed on a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the purpose of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, also can adopt the form of SFU software functional unit to realize.
If the form of SFU software functional unit of usining described integrated unit realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.Understanding based on such, the all or part of of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.
The above method to a kind of descending self-adapting modulating-coding provided by the present invention and device are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (12)

1. the method for a descending self-adapting modulating-coding, is characterized in that, comprising:
Obtain the channel quality indicator (CQI) of each terminal feedback in this community;
Obtain the historical schedule information of this community neighbor cell record;
According to described historical schedule information, the conflicting modes that described CQI is different according to neighbor cell are classified;
Calculate every two disturbance mode classifications CQI offset each other;
Obtain the conflicting mode of current each neighbor cell;
Utilize the affiliated CQI offset corresponding to classification of conflicting mode of current each neighbor cell to compensate respectively described CQI, with dispatching downlink Modulation and Coding Scheme MCS.
2. method according to claim 1, is characterized in that, the described CQI that obtains each terminal feedback in this community comprises full band CQI or the subband CQI that obtains each terminal feedback in this community.
3. method according to claim 2, is characterized in that, the described historical schedule information of obtaining this community neighbor cell record comprises the historical schedule information of obtaining X neighbor cell record, and described X is positive integer;
According to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: do not have neighbor cell interference entirely with CQI or subband CQI, be less than or equal to x neighbor cell interference entirely with CQI or subband CQI, the full band CQI that is greater than x neighbor cell interference or subband CQI, a full band portion Resource Block or a sub-band portion Resource Block, one or more neighbor cell interference are arranged, the part Resource Block does not have the CQI of neighbor cell interference, wherein, described x is for being more than or equal to 1, and is less than the integer of X.
4. method according to claim 3, is characterized in that, the CQI that obtains each terminal feedback in this community if described is the subband CQI that obtains each terminal feedback in this community;
The described historical schedule information of obtaining this community neighbor cell record comprises the historical schedule information of obtaining first-phase adjacent cell and second-phase adjacent cell record;
According to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: the subband CQI that there is no neighbor cell interference, the subband CQI that only has described first-phase adjacent cell to disturb, the subband CQI that only has described second-phase adjacent cell to disturb, the subband CQI that described first-phase adjacent cell and described the second neighbor cell interference are arranged simultaneously, a sub-band portion Resource Block has described first-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference, a sub-band portion Resource Block has described second-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference.
5. method according to claim 4, is characterized in that, every two the disturbance mode classifications of described calculating CQI offset each other comprises:
Be directed to the CQI of every two disturbance mode classifications, calculate two adjacent sub-bands, the CQI difference obtained at synchronization;
Described CQI difference is carried out to filtering;
Filtered CQI difference is defined as to the disturbance mode classification CQI offset each other of two neighbor cells.
6. method according to claim 4, is characterized in that, every two the disturbance mode classifications of described calculating CQI offset each other comprises:
Obtaining the useful signal interference-to-noise ratio ECINR that k subband of terminal m subframe of n feedback cycle measure is ECINR n, m, k, wherein, described n, m, k are positive integer;
According to feedback cycle, be M subframe, the quantification CQI that obtains k subband of n feedback cycle feedback of terminal is CQI n,k, the ECINR before corresponding quantification is:
Figure FDA00003743520300021
wherein, described M is positive integer;
By described ECINR n, m, kthe conflicting modes different according to described neighbor cell are classified, and obtain ECINR n, k, i, i=1,2,3,4 ... x, wherein, described ECINR n, m, kthe class categories number equal the class categories number of described CQI, described x is positive integer;
According to the historical schedule information of neighbor cell record, by described ECINR n, m, kcorrespond to described ECINR n, k, iupper, obtain
Figure FDA00003743520300022
wherein, d n, k, ifor positive integer, mean ECINR n, k, inumber;
According to the value of subband and feedback cycle, list J equation equation group, the ECINR that obtains the subband that j equation equation group obtain is ECINR n, j, i, described j is less than J, and described j, J are positive integer;
By ECINR n, j, iquantize to CQI, obtain CQI n, j, iand the difference between COI of all categories;
Difference between the COI of all categories that described J equation equation group obtained is done respectively on average, obtains every two disturbance mode classifications CQI offset each other.
7. the device of a descending self-adapting modulating-coding, is characterized in that, comprising:
Acquisition module, for obtaining the channel quality indicator (CQI) of this each terminal feedback of community;
Described acquisition module, also for obtaining the historical schedule information of this community neighbor cell record;
Sort module, for according to described historical schedule information, the conflicting modes that described CQI is different according to neighbor cell are classified;
Computing module, calculate every two disturbance mode classifications CQI offset each other;
Described acquisition module, also for obtaining the conflicting mode of current each neighbor cell;
Compensating module, the CQI offset corresponding for classification under the conflicting mode that utilizes current each neighbor cell compensates respectively described CQI, with dispatching downlink Modulation and Coding Scheme MCS.
8. device according to claim 7, is characterized in that, described acquisition module comprises full band CQI or the subband CQI that obtains each terminal feedback in this community for the CQI that obtains this each terminal feedback of community.
9. device according to claim 8, is characterized in that, described acquisition module comprises for the historical schedule information of obtaining this community neighbor cell record the historical schedule information of obtaining X neighbor cell record, and described X is positive integer;
According to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: do not have neighbor cell interference entirely with CQI or subband CQI, be less than or equal to x neighbor cell interference entirely with CQI or subband CQI, the full band CQI that is greater than x neighbor cell interference or subband CQI, a full band portion Resource Block or a sub-band portion Resource Block, one or more neighbor cell interference are arranged, the part Resource Block does not have the CQI of neighbor cell interference, wherein, described x is for being more than or equal to 1, and is less than the integer of X.
10. device according to claim 9, is characterized in that, if described acquisition module is the subband CQI that obtains each terminal feedback in this community for the CQI that obtains this each terminal feedback of community; The described historical schedule information of obtaining this community neighbor cell record comprises the historical schedule information of obtaining first-phase adjacent cell and second-phase adjacent cell record;
Described sort module is for according to neighbor cell, the different conflicting modes different classes of CQI obtained that classifies comprises: the subband CQI that there is no neighbor cell interference, the subband CQI that only has described first-phase adjacent cell to disturb, the subband CQI that only has described second-phase adjacent cell to disturb, the subband CQI that described first-phase adjacent cell and described the second neighbor cell interference are arranged simultaneously, a sub-band portion Resource Block has described first-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference, a sub-band portion Resource Block has described second-phase adjacent cell to disturb, the part Resource Block does not have the CQI of neighbor cell interference.
11. device according to claim 10, is characterized in that, described computing module is used for:
Be directed to the CQI of every two disturbance mode classifications, calculate two adjacent sub-bands, the CQI difference obtained at synchronization; Described CQI difference is carried out to filtering; Filtered CQI difference is defined as to the disturbance mode classification CQI offset each other of two neighbor cells.
12. device according to claim 10, is characterized in that, described computing module is used for:
Obtaining the useful signal interference-to-noise ratio ECINR that k subband of terminal m subframe of n feedback cycle measure is ECINR n, m, k, wherein, described n, m, k are positive integer;
According to feedback cycle, be M subframe, the quantification CQI that obtains k subband of n feedback cycle feedback of terminal is CQI n,k, the ECINR before corresponding quantification is:
Figure FDA00003743520300041
wherein, described M is positive integer;
By described ECINR n, m, kthe conflicting modes different according to described neighbor cell are classified, and obtain ECINR n, k, i, i=1,2,3,4 ... x, wherein, described ECINR n, m, kthe class categories number equal the class categories number of described CQI, described x is positive integer;
According to the historical schedule information of neighbor cell record, by described ECINR n, m, kcorrespond to described ECINR n, k, iupper, obtain wherein, d n, k, ifor positive integer, mean ECINR n, k, inumber;
According to the value of subband and feedback cycle, list J equation equation group, the ECINR that obtains the subband that j equation equation group obtain is ECINR n, j, i, described j is less than J, and described j, J are positive integer;
By ECINR n, j, iquantize to CQI, obtain CQI n, j, iand the difference between COI of all categories;
Difference between the COI of all categories that described J equation equation group obtained is done respectively on average, obtains every two disturbance mode classifications CQI offset each other.
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CN102487308A (en) * 2010-12-06 2012-06-06 中兴通讯股份有限公司 Feedback method of channel quality index (CQI) and apparatus thereof

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WO2016065516A1 (en) * 2014-10-27 2016-05-06 华为技术有限公司 Method and device for adaptive modulation and coding
CN105745985A (en) * 2014-10-27 2016-07-06 华为技术有限公司 Method and device for adaptive modulation and coding
US10230489B2 (en) 2014-10-27 2019-03-12 Huawei Technologies Co., Ltd. Adaptive modulation and coding method and apparatus
CN105634656A (en) * 2014-10-29 2016-06-01 中国移动通信集团公司 Method for determining modulation and coding scheme of terminal, terminal and base station
CN112104581A (en) * 2019-06-17 2020-12-18 中国电信股份有限公司 Modulation-demodulation method, modulation-demodulation device and computer-readable storage medium

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