CN104378780B

CN104378780B - A kind of method and apparatus for adjusting demodulation threshold

Info

Publication number: CN104378780B
Application number: CN201310351851.6A
Authority: CN
Inventors: 朱颖
Original assignee: Putian Information Technology Co Ltd
Current assignee: Putian Information Technology Co Ltd
Priority date: 2013-08-13
Filing date: 2013-08-13
Publication date: 2018-02-06
Anticipated expiration: 2033-08-13
Also published as: CN104378780A

Abstract

The invention provides a kind of method and apparatus for adjusting demodulation threshold.This method includes：To be multiple SINR subintervals per SINR interval divisions corresponding to rank MCS；For the uplink transmission data of all user terminals in the range of bandwidth of cell, the upstream sinr used, uplink MCS and corresponding testing result ACK/NACK are counted；According to the SINR of statistics, SINR subintervals testing result ACK/NACK corresponding to the SINR being referred to where the SINR；According to the testing result ACK/NACK for being referred to SINR subintervals, judge that the current thresholding that whether is demodulated adjusts, if it is, calculating adjustment deviant according to SINR subintervals, demodulation threshold is adjusted according to the adjustment deviant.Each rank MCS that the present invention can be directed to all user terminals of cell is demodulated thresholding adjustment simultaneously.

Description

A kind of method and apparatus for adjusting demodulation threshold

Technical field

The present invention relates to the communication technology, and in particular to a kind of method and apparatus for adjusting demodulation threshold.

Background technology

In mobile communication system, the demand of high speed data transmission service constantly increases, and base station is in order to faster and more accurately pass Defeated upstream data is, it is necessary to be adaptive selected up modulation coding mode（MCS）.The MCS of same order does not correspond to different reception letters Dry ratio of making an uproar（SINR）, MCS transmission performance is different and different with SINR's.At present, existing method is generally with 10% Block Error Rate To weigh, meet the demodulation threshold that corresponding SINR is MCS during 10% Block Error Rate.

Up MCS is adaptive selected, it is necessary to be adjusted to SINR corresponding to MCS demodulation threshold i.e. MCS in order to realize It is whole.At present, adjusting the method for demodulation threshold is：For each user terminal, SINR is measured in real time respectively, if measure SINR is in the range of SINR set in advance, then it is assumed that measurement data can use, and judge the circulation of the user terminal transmission packet Redundancy check code（Cyclic Redundancy Check, CRC）It it is current MCS pairs for MCS threshold values if CRC is correct The SINR answered, lowered on the basis of initial threshold by step-length, be SINR corresponding to current MCS conversely, for MCS threshold values, Raised on the basis of initial threshold by step-length.

It can be seen that current, adjustment demodulation threshold is carried out based on unique user terminal, i.e. statistics unique user terminal SINR and CRC, then carry out to should user terminal MCS demodulation thresholds adjust.And each intra-cell users terminal quantity crowd It is more, the processing of the demodulation thresholds such as above-mentioned measurement and judgement adjustment is performed both by for each user terminal, then considerably increases meter Calculation amount and memory cost, reduce the speed of adjustment.

The content of the invention

（One）The technical problem of solution

In view of the shortcomings of the prior art, the present invention provides a kind of method and apparatus for adjusting demodulation threshold, can be directed to small Each rank MCS of all user terminals in area is demodulated thresholding adjustment simultaneously.

（Two）Technical scheme

To realize object above, the present invention is achieved by the following technical programs：

A kind of method for adjusting demodulation threshold, will be multiple SINR per SINR interval divisions corresponding to rank modulation coding mode Subinterval；This method includes：

A, for the uplink transmission data of all user terminals in the range of bandwidth of cell, count use upstream sinr, on Row transmission MCS and corresponding testing result ACK/NACK；

B, according to the SINR of statistics, testing result ACK/NACK corresponding to the SINR is referred to the SINR where the SINR Subinterval；

C, according to the testing result ACK/NACK for being referred to SINR subintervals, judge that the current thresholding that whether is demodulated is adjusted It is whole, if it is, performing step D；

D, adjustment deviant is calculated according to SINR subintervals, demodulation threshold is adjusted according to the adjustment deviant.

This method further comprises：For statistical sample window corresponding to the setting of each SINR subinterval；

In step B, SINR subintervals bag testing result ACK/NACK corresponding to SINR being referred to where SINR Include：Testing result ACK/NACK corresponding to SINR recorded to statistical sample window corresponding to the SINR subintervals where SINR In.

Further comprise between step B and step C：For SINR subintervals, remember in statistical sample window corresponding to judgement Whether the NACK of record quantity is more than first predetermined value, if it is, to should SINR subintervals produce the first event；

The step C includes：For each SINR subinterval, whether the number of current caused first event of judgement Equal to the first preset times threshold value, if it is, determine it is current be demodulated thresholding adjustment, by first event that produced of record Number is reset, and performs step D.

This method further comprises：Pre-set the sample length L of each statistical sample window；

The first predetermined value is：The sample length L of statistical sample window and the product of maximum Block Error Rate.

It is described to be included according to SINR subintervals calculating adjustment deviant：

For corresponding MCS（i）SINR subintervals { SINR_WINmin (j), SINR_WINmax (j) }, wherein, MCS（i） For any one in lowest-order and above rank MCS；

Calculate OFFSET（i）=SINR_WINmax(j)-SINRmin(i)；

Wherein, OFFSET（i）For MCS（i）Deviant；SINRmin (i) is MCS（i）Corresponding SINR value；

It is described according to the adjustment deviant demodulation threshold is adjusted including:

By MCS（i）Corresponding SINRmin（i）Value be updated to this adjustment before SINRth（i）Value add OFFSET （i）.

Further comprise between step B and step C：For SINR subintervals, remember in statistical sample window corresponding to judgement Whether the NACK of record quantity is less than second predetermined value, if it is, to should SINR subintervals produce second event；

The step C includes：For each SINR subinterval, whether the number of the current caused second event of judgement Equal to the second preset times threshold value, if it is, determine it is current be demodulated thresholding adjustment, by the second event that produced of record Number is reset, and performs step D.

The second predetermined value is：The sample length L of statistical sample window and the product of minimum Block Error Rate.

For corresponding MCS（i）SINR subintervals { SINR_WINmin (j), SINR_WINmax (j) }, wherein, MCS（i） For the virtual MCS of lower single order of any one in lowest-order and above rank MCS, or the lowest-order MCS pre-set；

Calculate OFFSET（i+1）=SINR_WINmin(j)-SINRmin(i+1)；

Wherein, OFFSET（i+1）For MCS（i）Upper single order MCS（i+1）Deviant；SINRmin (i+1) is MCS（i+ 1）Corresponding SINR value；

By MCS（i+1）Corresponding SINRmin（i+1）Value is updated to the SINRth before this adjustment（i+1）Value add OFFSET（i+1）.

Described the step of being adjusted according to the adjustment deviant to demodulation threshold, further comprises:

For the MCS being currently adjusted（i）Corresponding demodulation threshold, the SINRth before this adjustment（i）Value after adjustment For SINRmin（i）;

If SINRmin（i）It is not most high-order MCS demodulation threshold, and SINRmin（i）≥（SINRmin（i+1）—Δ SINR）, then：

The MCS being further currently adjusted（i）The demodulation threshold of upper single order be adjusted, be：SINRmin（i+1）= SINRmin（i）+ΔSINR;

If SINRmin（i）It is not lowest-order MCS demodulation threshold, and SINRmin（i）≤（SINRmin（i-1）+Δ SINR）, then：

Further update the MCS being currently adjusted（i）Demodulation threshold, be：SINRmin（i）=SINRmin（i-1）+Δ SINR

Wherein, Δ SINR is default upper single order MCS and lower single order MCS demodulation threshold spacing value.

It is described to be per SINR sections corresponding to rank MCS：The SINR value corresponding with upper single order MCS of SINR value corresponding to the MCS Between section；

And/or

Each described SINR subinterval：Its minimum value and maximum are respectively equal to the maximum in next SINR subintervals With the minimum value in a upper SINR subinterval；

And/or

Described the step of will being multiple SINR subintervals per SINR interval divisions corresponding to rank MCS, further comprises：Set Virtual MCS, the virtual MCS are lowest-order MCS lower single order, using lowest-order MCS, by SINR value corresponding to lowest-order MCS Following interval division goes out multiple SINR subintervals, and corresponding virtual MCS.

This method further comprises:

Set demodulation threshold to lower and forbid timer, whenever demodulation threshold up-regulation operation is monitored, then reset and start Timer, before the timer is then, forbid lowering demodulation threshold.

A kind of device for adjusting demodulation threshold, including：

Division unit, for that will be multiple SINR subintervals per SINR interval divisions corresponding to rank MCS；

Statistic unit, for the uplink transmission data for all user terminals in the range of bandwidth of cell, count what is used Upstream sinr, uplink MCS and corresponding testing result ACK/NACK；

Sample sorts out unit, and according to the SINR of statistics, testing result ACK/NACK corresponding to the SINR is referred into this SINR subintervals where SINR；

Judging unit, for currently whether being carried out according to the testing result ACK/NACK for being referred to SINR subintervals, judgement Demodulation threshold adjusts, if it is, triggering adjustment unit；

Adjustment unit, after being triggered, adjustment deviant is calculated according to SINR subintervals, according to the adjustment deviant pair Demodulation threshold is adjusted.

The sample is sorted out unit and included：

Window sorts out subelement, for setting corresponding statistical sample window respectively for each SINR subinterval；Will Testing result ACK/NACK corresponding to SINR recorded in statistical sample window corresponding to SINR subintervals where SINR.

The sample is sorted out unit and further comprised：First event generating subunit, for sentencing for SINR subintervals Whether the NACK recorded in statistical sample window corresponding to disconnected quantity is more than first predetermined value, if it is, to should SINR it is sub Section produces the first event；

The judging unit, for for each SINR subinterval, judging that the event generating subunit has currently produced Whether the number of the first raw event is equal to the first preset times threshold value, if it is, determine that the current thresholding that is demodulated adjusts, will The number for having produced the first event of record is reset.

The adjustment unit includes：

First computation subunit, when calculating adjustment deviant according to SINR subintervals, for corresponding MCS（i）SINR Subinterval { SINR_WINmin (j), SINR_WINmax (j) }, wherein, MCS（i）To be any in lowest-order and above rank MCS One；

Calculate OFFSET（i）=SINR_WINmax(j)-SINRmin(i)；

First renewal subelement, for by MCS（i）Corresponding SINRmin（i）Value be updated to this adjustment before SINRth（i）Value add OFFSET（i）.

The sample is sorted out unit and further comprised：Second event generating subunit, for sentencing for SINR subintervals Whether the NACK recorded in statistical sample window corresponding to disconnected quantity is less than second predetermined value, if it is, to should SINR it is sub Section produces second event；

The judging unit, for for each SINR subinterval, judging that the second event generating subunit is current Whether the number of caused second event is equal to the second preset times threshold value, if it is, determining that the current thresholding that is demodulated is adjusted It is whole, the number for having produced second event of record is reset.

The adjustment unit includes：

Second computation subunit, for according to SINR subintervals calculate adjustment deviant when,

Calculate OFFSET（i+1）=SINR_WINmin(j)-SINRmin(i+1)；

Second renewal subelement, for by MCS（i+1）Corresponding SINRmin（i+1）Before value is updated to this adjustment SINRth（i+1）Value add OFFSET（i+1）.

The adjustment unit is further used for,

The division unit,

For setting SINR sections corresponding to every rank MCS to be：SINR value corresponding to the MCS is corresponding with upper single order MCS Section between SINR value；And/or

For setting each described SINR subinterval：Its minimum value and maximum are respectively equal to next SINR subintervals Maximum and a upper SINR subinterval minimum value；And/or

For setting virtual MCS, the virtual MCS is lowest-order MCS lower single order, using lowest-order MCS, by lowest-order Interval division corresponding to MCS below SINR value goes out multiple SINR subintervals, and corresponding virtual MCS.

The device further comprises：Demodulation threshold, which is lowered, forbids timer,

For the adjustment unit further when performing demodulation threshold up-regulation operation, triggering demodulation threshold, which is lowered, forbids timer Reset and start, before detecting the timer then, the adjustment unit is forbidden lowering demodulation threshold.

（Three）Beneficial effect

The present invention at least has following beneficial effect：

1st, the method and apparatus of adjustment MCS demodulation thresholds provided by the invention, disposably receive and count bandwidth of cell model The uplink transmission data of interior all user terminals is enclosed, according to the transmission situation of the user of multiple simultaneous transmissions, cell can be directed to All user terminals each rank MCS simultaneously be demodulated thresholding adjustment, regulate the speed and greatly improve.

2nd, in the present invention, it is adjusted for the demodulation threshold in whole cell range, without independent for each terminal Algorithm is run, largely saves amount of calculation and memory cost.

3rd, in the present invention, due to disposably receiving and counting the uplink number of all user terminals in the range of bandwidth of cell According to sample value, therefore, the transmission situation sample of primary sample is more, be advantageous to improve demodulation threshold adjustment accuracy.

4th, thinner SINR subintervals are marked off in the present invention, and the upstream sinr scope transmitted according to user classify into Row transmission situation is adjudicated and adjustment, avoids that SINR difference between user is larger to bring influence to adjustment result.

5th, in the present invention, individually adjusted per rank MCS demodulation threshold, avoid not same order and transmit situation to each rank MCS's Thresholding causes to influence each other.

6th, in the present invention, set demodulation threshold and lower and forbid timer, avoid demodulation threshold from shaking repeatedly, and can reach Demodulation threshold rises the effect dropped slowly soon.

Certainly, any product or method for implementing the present invention must be not necessarily required to reach all the above excellent simultaneously Point.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also Other accompanying drawings can be obtained according to these accompanying drawings.

Fig. 1 is the flow chart that demodulation threshold is adjusted in one embodiment of the invention；

Fig. 2 is MCS and its schematic diagram in corresponding SINR and SINR subintervals in one embodiment of the invention；

Fig. 3 is the flow chart that demodulation threshold is adjusted in a preferred embodiment of the present invention；

Fig. 4 is the structural representation for the device that demodulation threshold is adjusted in one embodiment of the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.

The embodiment of the present invention proposes a kind of method for adjusting demodulation threshold, and referring to Fig. 1, this method comprises the following steps：

Step 101：To be multiple SINR subintervals per SINR interval divisions corresponding to rank MCS.

Step 102：For the uplink transmission data of all user terminals in the range of bandwidth of cell, count use it is up SINR, uplink MCS and corresponding testing result ACK/NACK.

Step 103：According to the SINR of statistics, testing result ACK/NACK corresponding to the SINR is referred to where the SINR SINR subintervals.

Step 104：According to the testing result ACK/NACK for being referred to SINR subintervals, whether judgement is currently demodulated door Limit adjustment, if it is, performing step 105, otherwise, return to step 102.

Step 105：Adjustment deviant is calculated according to SINR subintervals, demodulation threshold adjusted according to the adjustment deviant It is whole.

In above-mentioned steps 101, it is per SINR sections corresponding to rank MCS：SINR value corresponding to the MCS and upper MCS pairs of single order Section between the SINR value answered；It is also, right when that will be multiple SINR subintervals per SINR interval divisions corresponding to rank MCS There is an especially processing, it is necessary to the interval division corresponding to lowest-order MCS below SINR value be gone out multiple in lowest-order MCS SINR subintervals, and to should lowest-order MCS.

In embodiments of the present invention, it can realize that the statistical sample in above-mentioned steps 103 is returned based on statistical sample window Class, at this point it is possible in advance for statistical sample window corresponding to the setting of each SINR subinterval；Correspondingly, it is SINR is corresponding Testing result ACK/NACK recorded in statistical sample window corresponding to SINR subintervals where SINR.

In embodiments of the present invention, demodulation threshold is adjusted and lowers two kinds of situations including upper reconcile：

Raised for demodulation threshold, based on above-mentioned statistical sample window, a kind of preferably implementation can be：For every Whether one SINR subinterval, the NACK recorded in statistical sample window corresponding to judgement quantity are more than first predetermined value（The One predetermined value can be：The sample length L of statistical sample window and the product of maximum Block Error Rate）, if it is, to should SINR Section produces the first event；So, in above-mentioned steps 104, the process for judging whether to thresholding adjustment is then：For each SINR subintervals, judgement have currently produced（For example continuously generate）The number of the first event whether be equal to the first preset times threshold Value, if it is, the number for having produced the first event of record is reset, it is determined that current be demodulated thresholding adjustment, it is preferred that being The threshold value of MCS corresponding to current SINR subintervals is raised.Accordingly, in step 105, can be by current SINR The maximum in current SINR subintervals is adjusted in the demodulation threshold value of MCS corresponding to section.

Lowered for demodulation threshold, based on above-mentioned statistical sample window, a kind of preferably implementation can be：For every Whether one SINR subinterval, the NACK recorded in statistical sample window corresponding to judgement quantity are less than second predetermined value（The Two predetermined values can be：The sample length L of statistical sample window and the product of minimum Block Error Rate）, if it is, to should SINR Section produces second event；So, in above-mentioned steps 104, the process for judging whether to thresholding adjustment is then：For each SINR subintervals, judgement have currently produced（For example continuously generate）The number of second event whether be equal to the second preset times threshold Value, if it is, the number for having produced second event of record is reset, it is determined that current be demodulated thresholding adjustment, it is preferred that should Thresholding adjustment can be by upper single order MCS threshold value downward.Accordingly, in step 105, can be by current SINR subintervals Corresponding MCS upper single order MCS demodulation threshold value is adjusted downward to the minimum value in current SINR subintervals.

It is preferred that in embodiments of the present invention, protection operation further can also be carried out to thresholding adjustment, avoid threshold value What is adjusted is too small or excessive, and now, a kind of preferably processing procedure is：

In order to more clearly explain the implementation process of the embodiment of the present invention, below by taking a specific example as an example, Illustrate.Referring to Fig. 2 and Fig. 3, the process includes：

Step 300：SINR sections corresponding to every rank MCS are pre-set, and are divided into multiple SINR subintervals.

Step 301：Virtual MCS is set, and the virtual MCS is lowest-order MCS lower single order, using lowest-order MCS, by this most Interval division corresponding to low order MCS below SINR value goes out multiple SINR subintervals, and corresponding virtual MCS.

Into step 301, SINR sections corresponding to every rank MCS are above-mentioned steps 300：SINR value corresponding to the MCS with it is upper Section between SINR value corresponding to single order MCS.For example referring to Fig. 2, for MCS1, its corresponding demodulation threshold is SINRmin (1), demodulation threshold corresponding to the MSC2 of the upper single orders of MCS1 is SINRmin (2), and so, SINR sections are exactly corresponding to MCS1 { SINRmin (1), SINRmin (2) }, it is the 7 as shown in Figure 2 SINR subintervals for corresponding to MCS1 by the interval division, For example first SINR subinterval corresponding to MCS1 is { SINR_WINmin (7), SINR_WINmin (8) }, last is right Should be in MCS1 SINR subintervals { SINR_WINmin (13), SINR_WINmin (14) }.SINR_WINmin (14) value etc. In SINRmin (2)；SINR_WINmin (7) value is equal to SINRmin (1).

For each SINR subinterval：Its minimum value and maximum are respectively equal to the maximum in next SINR subintervals With the minimum value in a upper SINR subinterval.

Further, referring to Fig. 2, for lowest-order MCS1, in order to ensure that follow-up MCS1 can be demodulated under thresholding Adjust, employ the processing of above-mentioned steps 301, the interval division corresponding to lowest-order MCS1 below SINR value can be gone out multiple SINR subintervals, the plurality of SINR subintervals correspond to virtual MCS1.

Step 302：In advance for statistical sample window corresponding to the setting of each SINR subinterval.

Here it is possible to previously according to actual business requirement, the length L, L of each statistical sample window are set effectively to remember The statistical sample number of record is unit, you can L effective statistical samples of record.

Step 303：For the uplink transmission data of all user terminals in the range of bandwidth of cell, received data packet feedback knot Fruit NACK/ACK, count the upstream sinr used and corresponding testing result ACK/NACK, and corresponding MCS.

Step 304：For each uplink transmission data, judge whether the upstream sinr of received data packet is in packet SINR sections corresponding to MCS used, if it is, being considered valid data, step 305 is performed, otherwise, is considered as invalid data, returns Return step 303.

Step 305：The SINR value size used according to reception, determines the SINR subintervals where the SINR value.

Step 306：Testing result ACK/NACK corresponding to the SINR value used recorded to the SINR sub-districts where SINR Between in corresponding statistical sample window.

Above-mentioned steps 305 are into step 306, such as SINR_WINmin (j)<=SINR<

SINR_WINmax (j), then it is referred in corresponding win (j) window and records.SINR_WINmin (j) is SINR Section j SINR lower limits, SINR_WINmax (j) are the SINR subintervals j upper limit, are also equal to SINR subintervals j+1 lower limit. Specific statistical sample window with the mode of time stepping method can be every frame slip, can also be segmented plain etc..Do not do herein Limit.

It should also be noted that, during above-mentioned steps 303 are to step 306, if not receiving feedback or correspondingly Being sent without business datum for moment, then do not add windows content.When data existence time exceedes maximum effective time in list Tmax, then remove the data in window.

Step 307：NACK numbers NACK_NUM in statistical sample window corresponding to each SINR subintervals of real-time statistics.

The processing of this step can be performed in each measurement period then.

For example raised for demodulation threshold, the processing of this step can be performed both by each radio frames, system can also be waited until When counting sample window completely, the processing of this step is performed.

Lowered for demodulation threshold, be when expiring when statistical sample window, perform the processing of this step.

Step 308：If NACK_NUM>MAX_NACK_NUM, then produce an event 1：United corresponding to SINR subintervals Count sample window win（j）It is middle to use MCS（i）The BLER of transmission（i）>MAX_BLER（i）Event.

In this step, MAX_NACK_NUM=L*MAX_BLER（i）, wherein, MAX_BLER（i）For the maximum pre-set Block Error Rate.

Step 309：In the window win of L length（j）When statistics is full, if NACK_NUM<MIN_NACK_NUM, then produce Event 2：SINR subintervals window win（j）It is middle to use MCS（i）The BLER of transmission（i）<MIN_BLER（i）Event.

In this step, MIN_NACK_NUM=L*MIN_BLER（i）, wherein, MIN_BLER（i）For the minimum pre-set Block Error Rate.

Step 310：Judge statistical sample window win corresponding to any one SINR subinterval（j）It is middle to use MCS（i）Pass When defeated, if default k1 event 1 is recurred, if it is, performing step 311, otherwise, return to step 303.

Here, if it is judged that being yes, then it is assumed that the SINR in the range of the SINR subintervals can not meet the biography of the MCS Defeated demand is, it is necessary to which the up-regulation that step 311 is performed to this rank MCS thresholdings operates.

Step 311：Adjustment deviant is calculated according to SINR subintervals, according to the demodulation of the adjustment deviant to this rank MCS Thresholding is raised.

It should be noted that for the SINR subintervals below lowest-order MCS thresholdings, raise and grasp without demodulation threshold Make.

In this step, calculating adjustment deviant according to SINR subintervals includes：

For corresponding MCS（i）SINR subintervals { SINR_WINmin (j), SINR_WINmax (j) }, wherein, MCS（i） For any one in lowest-order and above rank MCS, i.e., do not include virtual MCS,

Calculate OFFSET（i）=SINR_WINmax(j)-SINRmin(i)；

Correspondingly, carrying out up-regulation to this rank demodulation threshold according to the adjustment deviant includes:

By MCS（i）Corresponding SINRmin（i）Value be updated to this adjustment before SINRth（i）Value add OFFSET （i）, that is to say, that the SINRth before this adjustment（i）SINRmin after as last adjustment（i）Value, if not upper one Secondary adjustment, as initial setting.

Step 312：Judge any one SINR subinterval window win（j）It is middle to use MCS（i）During transmission, if continuous hair It is raw to preset k2 event 2, if it is, execution step 313, otherwise return to step 303.

In this step, if it is judged that being yes, then think that the SINR in the range of the SINR subintervals can not meet this MCS transmission demand is, it is necessary to which the downward that step 313 is performed to upper single order MCS thresholdings operates.

Step 313：Adjustment deviant, the solution according to the adjustment deviant to upper single order MCS are calculated according to SINR subintervals Pitch limit is lowered.

It should be noted that for the SINR subintervals below lowest-order MCS thresholdings, upper single order MCS corresponding to it is exactly Lowest-order MCS.

For corresponding MCS（i）SINR subintervals { SINR_WINmin (j), SINR_WINmax (j) }, wherein, MCS（i） For the virtual MCS of lower single order of any one in lowest-order and above rank MCS, or the lowest-order MCS pre-set, that is, Say, all MCS including virtual MCS；

Calculate OFFSET（i+1）=SINR_WINmin(j)-SINRmin(i+1)；

Correspondingly, carrying out downward to upper single order MCS demodulation thresholds according to the adjustment deviant includes:

It should be noted that the priority being had no between each step in flow shown in above-mentioned Fig. 3 in strict execution is suitable Sequence, many steps are to perform simultaneously, or can exchange order, such as process and above-mentioned step of the above-mentioned steps 310 to step 311 Rapid 312 can be carried out to the process of step 313 simultaneously.For another example, the process of above-mentioned steps 310 and step 312 is to enter in real time Capable.

, can be by such as in order to avoid the adjustment to a demodulation threshold is excessive or too small during shown in above-mentioned Fig. 3 Under processing come be further ensured that thresholding adjustment reasonability：

For any one MCS, MCS is designated as（i）, after being demodulated thresholding adjustment, for the MCS being currently adjusted （i）Corresponding demodulation threshold, the SINRth before this adjustment（i）Value after adjustment is SINRmin（i）;

Situation 1：If SINRmin（i）It is not most high-order MCS demodulation threshold, and SINRmin（i）≥（SINRmin（i+ 1）—ΔSINR）, then：

Situation 2：If SINRmin（i）It is not lowest-order MCS demodulation threshold, and SINRmin（i）≤（SINRmin（i- 1）+ΔSINR）, then：

It should be noted that during shown in above-mentioned Fig. 3, if same MCS occurred within the same time simultaneously Multiple demodulation threshold up-regulation operations, then adjust deviant OFFSET and be defined by the upper tone pitch of maximum；It is if right within the same time Same MCS occurs multiple demodulation thresholds and lowers operation simultaneously, then adjusts deviant OFFSET and be defined by the lower tone pitch of minimum.

It should also be noted that, during shown in above-mentioned Fig. 3, the effect dropped slowly is risen soon in order to reach demodulation threshold, can Forbid timer to pre-set demodulation threshold and lower, whenever demodulation threshold up-regulation operation is monitored, then reset and start and determine When device, before the timer is then, forbid to demodulation threshold lower.

A kind of device for adjusting demodulation threshold is proposed in one embodiment of the invention, referring to 4, including：

In embodiments of the present invention, can be counted in the form of window and data storage, now, the sample is sorted out Unit includes：

Sort out the processing of subelement based on above-mentioned window, at least there are following two kinds and judge to be demodulated thresholding adjustment and phase The implementation for the adjustment answered, including：

Mode one,

Sample is sorted out unit and further comprised：First event generating subunit, for for each SINR subintervals, sentencing Whether the NACK recorded in statistical sample window corresponding to disconnected quantity is more than first predetermined value, if it is, to should SINR it is sub Section produces the first event；

Judging unit, for for each SINR subinterval, judging that the event generating subunit is current caused Whether the number of the first event is equal to the first preset times threshold value, if it is, determining that the current thresholding that is demodulated adjusts, will record Produced the first event number reset.

Correspondingly, the adjustment unit includes：

Calculate OFFSET（i）=SINR_WINmax(j)-SINRmin(i)；

Mode two,

Sample is sorted out unit and further comprised：Second event generating subunit, for for each SINR subintervals, sentencing Whether the NACK recorded in statistical sample window corresponding to disconnected quantity is less than second predetermined value, if it is, to should SINR it is sub Section produces second event；

Judging unit, for for each SINR subinterval, judging that the second event generating subunit has currently produced Whether the number of raw second event is equal to the second preset times threshold value, if it is, determine that the current thresholding that is demodulated adjusts, will The number for having produced second event of record is reset.

Correspondingly, adjustment unit includes：

Calculate OFFSET（i+1）=SINR_WINmin(j)-SINRmin(i+1)；

No matter use which kind of above-mentioned mode, in a preferred embodiment of the present invention, demodulation threshold can be adjusted into traveling One step is protected, and avoids adjusting excessive and too small situation generation, and now, adjustment unit is further used for,

In a preferred embodiment of the present invention, the function of the division unit includes：

Virtual MCS is set, and the virtual MCS is lowest-order MCS lower single order, using lowest-order MCS, by MCS pairs of lowest-order The interval division below SINR value answered goes out multiple SINR subintervals, and corresponding virtual MCS.

In order to be further ensured that the device of the embodiment of the present invention can avoid demodulation threshold from shaking repeatedly, reach fast and rise slow drop Effect, the device may further include：Demodulation threshold, which is lowered, forbids timer, and now, adjustment unit is further performing During demodulation threshold up-regulation operation, triggering demodulation threshold, which is lowered, forbids timer to reset and start, and is detecting the timer then Before, the adjustment unit is forbidden lowering demodulation threshold.

It should be noted that herein, such as first and second or the like relational terms are used merely to a reality Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that Other identical element also be present in process, method, article or equipment including the key element.

The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.

Claims

A kind of 1. method for adjusting demodulation threshold, it is characterised in that dry make an uproar will be believed per being received corresponding to rank modulation coding mode MCS It is multiple SINR subintervals than SINR interval division；This method includes：

A, for the uplink transmission data of all user terminals in the range of bandwidth of cell, the upstream sinr used, up biography are counted Defeated MCS and corresponding testing result ACK/NACK；

B, according to the SINR of statistics, SINR sub-districts testing result ACK/NACK corresponding to the SINR being referred to where the SINR Between；

C, according to the testing result ACK/NACK for being referred to SINR subintervals, judge that the current thresholding that whether is demodulated adjusts, such as Fruit is to perform step D；

D, adjustment deviant is calculated according to SINR subintervals, demodulation threshold is adjusted according to the adjustment deviant.
2. according to the method for claim 1, it is characterised in that this method further comprises：For each SINR sub-district Between set corresponding to statistical sample window；

In step B, it is described testing result ACK/NACK corresponding to SINR is referred to SINR where SINR subintervals include：Will Testing result ACK/NACK corresponding to SINR recorded in statistical sample window corresponding to SINR subintervals where SINR.
3. according to the method for claim 2, it is characterised in that

Further comprise between step B and step C：For SINR subintervals, recorded in statistical sample window corresponding to judgement Whether NACK quantity is more than first predetermined value, if it is, to should SINR subintervals produce the first event；

The step C includes：For each SINR subinterval, judge whether the number of current caused first event is equal to First preset times threshold value, if it is, determining that the current thresholding that is demodulated adjusts, by the number for having produced the first event of record Reset, perform step D.
4. according to the method for claim 3, it is characterised in that this method further comprises：Pre-set each statistics The sample length L of sample window；

The first predetermined value is：The sample length L of statistical sample window and the product of maximum Block Error Rate.
5. according to the method for claim 3, it is characterised in that

It is described to be included according to SINR subintervals calculating adjustment deviant：

For the SINR subintervals { SINR_WINmin (j), SINR_WINmax (j) } of corresponding MCS (i), wherein, MCS (i) is most Any one in low order and above rank MCS；SINR_WINmin (j) be SINR subintervals j SINR lower limits, SINR_WINmax (j) upper limit for being SINR subintervals j；

Calculate OFFSET (i)=SINR_WINmax (j)-SINRmin (i)；

Wherein, OFFSET (i) is MCS (i) deviant；SINRmin (i) is the value of SINR corresponding to MCS (i)；

It is described according to the adjustment deviant demodulation threshold is adjusted including:

The value that the value of SINRmin (i) corresponding to MCS (i) is updated to the SINRth (i) before this adjustment adds OFFSET (i)； SINRth (i) is demodulation threshold corresponding to MCS (i) before this adjustment.
6. according to the method for claim 2, it is characterised in that

Further comprise between step B and step C：For SINR subintervals, recorded in statistical sample window corresponding to judgement Whether NACK quantity is less than second predetermined value, if it is, to should SINR subintervals produce second event；

The step C includes：For each SINR subinterval, judge whether the number of current caused second event is equal to Second preset times threshold value, if it is, determining that the current thresholding that is demodulated adjusts, by the number for having produced second event of record Reset, perform step D.
7. according to the method for claim 6, it is characterised in that this method further comprises：Pre-set each statistics The sample length L of sample window；

The second predetermined value is：The sample length L of statistical sample window and the product of minimum Block Error Rate.
8. according to the method for claim 6, it is characterised in that

It is described to be included according to SINR subintervals calculating adjustment deviant：

For the SINR subintervals { SINR_WINmin (j), SINR_WINmax (j) } of corresponding MCS (i), wherein, MCS (i) is most Any one in low order and above rank MCS, or the lowest-order MCS pre-set the virtual MCS of lower single order；SINR_WINmin (j) the SINR lower limits for being SINR subintervals j, SINR_WINmax (j) are the SINR subintervals j upper limit；

Calculate OFFSET (i+1)=SINR_WINmin (j)-SINRmin (i+1)；

Wherein, OFFSET (i+1) is the deviant of MCS (i) upper single order MCS (i+1)；SINRmin (i+1) is that MCS (i+1) is right The SINR answered value；

It is described according to the adjustment deviant demodulation threshold is adjusted including:

The value that SINRmin (i+1) value corresponding to MCS (i+1) is updated to the SINRth (i+1) before this adjustment adds OFFSET (i+1)；SINRth (i+1) is demodulation threshold corresponding to MCS (i+1) before this adjustment.
9. method as claimed in any of claims 1 to 8, it is characterised in that described according to the adjustment deviant pair The step of demodulation threshold is adjusted further comprises:

The demodulation threshold corresponding to the MCS (i) that is currently adjusted, the value after SINRth (i) adjustment before this adjustment are SINRmin(i)；SINRth (i) is demodulation threshold corresponding to MCS (i) before this adjustment；

If SINRmin (i) is not most high-order MCS demodulation threshold, and SINRmin (i) >=(SINRmin (i+1)-Δ SINR), then：

Further the demodulation threshold of the upper single order for the MCS (i) being currently adjusted is adjusted, is：SINRmin (i+1)= SINRmin(i)+ΔSINR；

If SINRmin (i) is not lowest-order MCS demodulation threshold, and SINRmin (i)≤(SINRmin (i-1)+Δ SINR), then：

The demodulation threshold for the MCS (i) being currently adjusted further is updated, is：SINRmin (i)=SINRmin (i-1)+Δ SINR

Wherein, Δ SINR is default upper single order MCS and lower single order MCS demodulation threshold spacing value, and SINRmin (i-1) is MCS (i) SINR value corresponding to lower single order MCS (i-1).
10. according to any described method in claim 1 to 8, it is characterised in that

It is described to be per SINR sections corresponding to rank MCS：Between the SINR value corresponding with upper single order MCS of SINR value corresponding to the MCS Section；

And/or

Each SINR subinterval：Its minimum value and maximum are respectively equal to the maximum in next SINR subintervals and upper one The minimum value in SINR subintervals；

And/or

Described the step of will being multiple SINR subintervals per SINR interval divisions corresponding to rank MCS, further comprises：Set virtual MCS, the virtual MCS are lowest-order MCS lower single order, using lowest-order MCS, by corresponding to lowest-order MCS below SINR value Interval division go out multiple SINR subintervals, and corresponding virtual MCS.
11. according to any described method in claim 1 to 8, it is characterised in that this method further comprises:

Set demodulation threshold to lower and forbid timer, whenever demodulation threshold up-regulation operation is monitored, then reset and start timing Device, before the timer is then, forbid lowering demodulation threshold.
A kind of 12. device for adjusting demodulation threshold, it is characterised in that including：

Division unit, for that will be multiple SINR subintervals per SINR interval divisions corresponding to rank MCS；

Statistic unit, for the uplink transmission data for all user terminals in the range of bandwidth of cell, count use it is up SINR, uplink MCS and corresponding testing result ACK/NACK；

Sample sorts out unit, and according to the SINR of statistics, testing result ACK/NACK corresponding to the SINR is referred into the SINR institutes SINR subintervals；

Judging unit, for currently whether being demodulated according to the testing result ACK/NACK for being referred to SINR subintervals, judgement Thresholding adjusts, if it is, triggering adjustment unit；

Adjustment unit, after being triggered, adjustment deviant is calculated according to SINR subintervals, according to the adjustment deviant to demodulation Thresholding is adjusted.
13. device according to claim 12, it is characterised in that the sample is sorted out unit and included：

Window sorts out subelement, for setting corresponding statistical sample window respectively for each SINR subinterval；By SINR Corresponding testing result ACK/NACK recorded in statistical sample window corresponding to SINR subintervals where SINR.
14. device according to claim 13, it is characterised in that

The sample is sorted out unit and further comprised：First event generating subunit, for for the judgement pair of SINR subintervals Whether the NACK recorded in the statistical sample window answered quantity is more than first predetermined value, if it is, to should SINR subintervals Produce the first event；

The judging unit, for for each SINR subinterval, judging that the event generating subunit is current caused Whether the number of the first event is equal to the first preset times threshold value, if it is, determining that the current thresholding that is demodulated adjusts, will record Produced the first event number reset.
15. device according to claim 14, it is characterised in that the adjustment unit includes：

First computation subunit, when calculating adjustment deviant according to SINR subintervals, for the SINR sub-districts of corresponding MCS (i) Between { SINR_WINmin (j), SINR_WINmax (j) }, wherein, MCS (i) is any one in lowest-order and above rank MCS； SINR_WINmin (j) is SINR subintervals j SINR lower limits, and SINR_WINmax (j) is the SINR subintervals j upper limit；

Calculate OFFSET (i)=SINR_WINmax (j)-SINRmin (i)；

Wherein, OFFSET (i) is MCS (i) deviant；SINRmin (i) is the value of SINR corresponding to MCS (i)；

First renewal subelement, for the value of SINRmin (i) corresponding to MCS (i) to be updated to the SINRth before this adjustment (i) value adds OFFSET (i)；SINRth (i) is demodulation threshold corresponding to MCS (i) before this adjustment.
16. device according to claim 13, it is characterised in that

The sample is sorted out unit and further comprised：Second event generating subunit, for for the judgement pair of SINR subintervals Whether the NACK recorded in the statistical sample window answered quantity is less than second predetermined value, if it is, to should SINR subintervals Produce second event；

The judging unit, for for each SINR subinterval, judging that the second event generating subunit has currently produced Whether the number of raw second event is equal to the second preset times threshold value, if it is, determine that the current thresholding that is demodulated adjusts, will The number for having produced second event of record is reset.
17. device according to claim 16, it is characterised in that the adjustment unit includes：

Second computation subunit, for according to SINR subintervals calculate adjustment deviant when,

For the SINR subintervals { SINR_WINmin (j), SINR_WINmax (j) } of corresponding MCS (i), wherein, MCS (i) is most Any one in low order and above rank MCS, or the lowest-order MCS pre-set the virtual MCS of lower single order；SINR_WINmin (j) the SINR lower limits for being SINR subintervals j, SINR_WINmax (j) are the SINR subintervals j upper limit；

Calculate OFFSET (i+1)=SINR_WINmin (j)-SINRmin (i+1)；

Wherein, OFFSET (i+1) is the deviant of MCS (i) upper single order MCS (i+1)；SINRmin (i+1) is that MCS (i+1) is right The SINR answered value；

Second renewal subelement, for SINRmin (i+1) value corresponding to MCS (i+1) to be updated to the SINRth before this adjustment (i+1) value adds OFFSET (i+1)；SINRth (i+1) is demodulation threshold corresponding to MCS (i+1) before this adjustment.
18. according to any described device in claim 12 to 16, it is characterised in that the adjustment unit is further used for,

The demodulation threshold corresponding to the MCS (i) that is currently adjusted, the value after SINRth (i) adjustment before this adjustment are SINRmin(i)；SINRth (i) is demodulation threshold corresponding to MCS (i) before this adjustment；

If SINRmin (i) is not most high-order MCS demodulation threshold, and SINRmin (i) >=(SINRmin (i+1)-Δ SINR), then：

Further the demodulation threshold of the upper single order for the MCS (i) being currently adjusted is adjusted, is：SINRmin (i+1)= SINRmin(i)+ΔSINR；

If SINRmin (i) is not lowest-order MCS demodulation threshold, and SINRmin (i)≤(SINRmin (i-1)+Δ SINR), then：

The demodulation threshold for the MCS (i) being currently adjusted further is updated, is：SINRmin (i)=SINRmin (i-1)+Δ SINR

Wherein, Δ SINR is default upper single order MCS and lower single order MCS demodulation threshold spacing value, and SINRmin (i-1) is MCS (i) SINR value corresponding to lower single order MCS (i-1).
19. according to any described device in claim 12 to 16, it is characterised in that the division unit,

For setting SINR sections corresponding to every rank MCS to be：The SINR value corresponding with upper single order MCS of SINR value corresponding to the MCS Between section；And/or

For setting each SINR subinterval：Its minimum value and maximum are respectively equal to the maximum in next SINR subintervals With the minimum value in a upper SINR subinterval；And/or

For setting virtual MCS, the virtual MCS is lowest-order MCS lower single order, using lowest-order MCS, by MCS pairs of lowest-order The interval division below SINR value answered goes out multiple SINR subintervals, and corresponding virtual MCS.
20. according to any described device in claim 12 to 16, it is characterised in that the device further comprises：Solve pitch Timer is forbidden in limit downward,

For the adjustment unit further when performing demodulation threshold up-regulation operation, triggering demodulation threshold, which is lowered, forbids timer to reset And start, before detecting the timer then, the adjustment unit is forbidden lowering demodulation threshold.