CN101207435B - Method for modulating down special channel speed - Google Patents

Abstract

The invention discloses a method for down regulating the velocity of a special channel. Step S102 is realized by configuring a relative 4B threshold; step S104 is realized by calculating all 4B thresholds corresponding to all transmission formats corresponding to all current operation types according to the relative 4B threshold; step S106 is realized by comparing the occupation amount of the current operation amount with the 4B thresholds the transmission formats of which are reduced one by one when the occupation amount of the current operation amount is less than the 4B threshold corresponding to a current transmission format, and decreeing to down-regulate the velocity by j grades when finding out that the occupation amount of the current operation amount is less than the 4B threshold which is reduced by j transmission formats and is more than the 4B threshold which is reduced by j plus 1 transmission formats. The DCH channel velocity is dynamically regulated according to the actual operation amount, and the systematic performance and the code resource utilization are improved.

Description

Method for modulating down special channel speed

Technical field

The present invention relates to wireless communication technology, relate in particular to a kind of method for modulating down special channel speed.

Background technology

At WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) in the system, RRC (Radio Resource control, Radio Resource Control) carries out dynamic radio carrying control by configuration service measurement amount (Traffic Volume Measurements).Cardinal principle is: as measuring business volume value BO (Buffer Occupancy) during greater than certain thresholding 4A Threshold, report the 4A incident, as triggering the low rate radio bearer to high-rate wireless load bearing migration process (4A Event) or as the constraints of moving, as measuring business volume value BO (Buffer Occupancy) during, report the carrying of 4B Event triggered high-rate wireless to low rate wireless bearing transferring process (4B Event) or as the constraints of migration less than certain thresholding 4BThreshold.By this dynamic radio carrying controlling mechanism, provide power system capacity and service quality based on subscriber traffic.

The downward modulation of DCH (Dedicated CHannel, dedicated channel) channel speed, (BO Measurement) reports the 4B Event triggered by measuring business volume.Measuring business volume is provided with two thresholdings, be respectively 4A thresholding and 4B thresholding, as RNC (Radio NetworkController, radio network controller) the EMS memory occupation amount reaches or during less than the 4B thresholding, report the 4B incident, when the 4B incident that reports reaches certain number of times, according to certain regular regulating down DCH signal channel speed.

The 4B thresholding is disposed by the backstage, and when reporting the 4B incident to reach certain number of times, the grade of adjusting speed is the problem that needs are considered.If when triggering the 4B incident, speed is according to the downward adjustment of grade one-level level, angle from the stability of a system, the situation that can avoid adjusting vibration takes place, if adjust downwards according to multistage mode, the required speed of the business of adjusting to that can be very fast discharges professional shared sign indicating number resource fast, but has increased the generation of the situation of speed adjustment vibration.Generally, the 4B thresholding is by relative percentage of backstage configuration, a radix be multiply by according to relative percentage in the foreground, obtain an absolute thresholding, system gets the absolute thresholding that current EMS memory occupation amount BO and foreground calculate and compares then, if less than, then report the 4B incident, downward modulation speed.So,, determine the grade of speed downward modulation dynamically, in agreement or present disclosed algorithm, do not described how according to the situation of current business amount.

Therefore, need a kind of DCH speed downward modulation algorithm, can determine the grade of speed downward modulation flexibly, with the performance that reaches the raising system and the purpose of sign indicating number resource utilization according to what of current EMS memory occupation amount.

Summary of the invention

Main purpose of the present invention is to provide a kind of method for modulating down special channel speed, is used for reprovision DCH channel speed downward modulation algorithm, with performance and the sign indicating number resource utilization that improves system.

To achieve these goals, the invention provides a kind of method for modulating down special channel speed.This method for modulating down special channel speed may further comprise the steps:

Step S102, configuration 4B relative threshold;

Step S104 according to described 4B relative threshold, calculates all corresponding 4B threshold values of all transformats corresponding with present type of service;

Step S106, current business amount occupancy is during less than the pairing 4B threshold value of current transformat, described current business amount occupancy and the 4B threshold value that reduces transformat are one by one compared, when finding described current business amount occupancy less than the 4B threshold value that has reduced by j transformat and when having reduced the 4B threshold value of j+1 transformat, judgement is reduced the j level with speed.

Alternatively, in step S104, according to the set TFS={TF1 of the transformat corresponding with all types of service, TF2 ..., TFn} calculates 4B threshold value set 4BS={4B1,4B2 ..., 4Bn}.Transmission block number * the transport block size of 4Bn=(RTT/tti) * TFn correspondence * 4B relative threshold, wherein, RTT is that tti is dispatching cycle according to the fixed value of Loop Round Trip Time configuration.

Further, in step S106,, choose current transmission format subset TFs={TF1 according to the present rate state, TF2 ..., TFm}, wherein, m＜=n, and choose 4B threshold value subclass 4Bs={4B1,4B2 ..., 4Bm}.

Further, current business amount occupancy BO is during smaller or equal to 4Bm-1,4B threshold value among BO and the described 4B threshold value subclass 4Bs is compared, if 4Bm-j-1＜BO＜=4Bm-j, then adjudicate speed is reduced the j level, described current transmission format subset TFs is adjusted into { TF1, TF2, ..., TFm-j}.

Alternatively, in step S102, configuration 4B reporting events frequency threshold value.

Further, in step S104, according to the set TFS={TF1 of the transformat corresponding with all types of service, TF2 ..., TFn}, calculate 4B threshold value set 4BS={4B1,4B2 ..., 4Bn}, wherein, the transmission block number * transport block size of 4Bn=(RTT/tti) * TFn correspondence * 4B relative threshold, wherein, RTT is that tti is dispatching cycle according to the fixed value of Loop Round Trip Time configuration.

Further, in step S106,, choose current transmission format subset TFs={TF1 according to the present rate state, TF2 ..., TFm}, wherein, m＜=n, and choose 4B threshold value subclass 4Bs={4B1,4B2 ..., 4Bm}.

Further, dispose current 4B reporting events counter array 4BCounter={4BCounter (1), 4BCounter (2) ..., 4BCounter (m) }.

Further, determine speed downward modulation grade by following steps:

Step S202 as traffic carrying capacity occupancy BO during smaller or equal to 4Bm-1, reports the 4B incident, 4BCounter (1)=4BCounter (1)+1;

Step S204, the element j of detection BO correspondence in described 4B threshold value subclass 4Bs, described j satisfies 4Bj＞BO＞=4Bj-1;

Step S206,4BCounter (i)=4BCounter (i)+1, wherein, and i=j ..., m-1;

Step S208, detect the element 4BCounter (k) among the described 4B reporting events counter array 4BCounter, if there is 4BCounter (k)＞=4B reporting events frequency threshold value, maximizing K therein then, be judged to be speed downward modulation m-K level, with the described 4B reporting events counter array 4BCounter zero clearing that resets, described current transmission format subset TFs is adjusted into { TF1, TF2, ..., TFm-K} is back to step S106, otherwise is back to step S202.

This method for modulating down special channel speed is applied to broadband CDMA system.

By technique scheme, the present invention can adjust the DCH channel speed dynamically according to actual volume, has improved systematic function and sign indicating number resource utilization.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is the flow chart according to method for modulating down special channel speed of the present invention; And

Fig. 2 is the DCH channel speed downward modulation algorithm flow chart according to the embodiment of the invention.

Embodiment

Describe the present invention below with reference to the accompanying drawings in detail.

With reference to Fig. 1, method for modulating down special channel speed according to the present invention may further comprise the steps:

Step S102, configuration 4B relative threshold.

Step S104 according to described 4B relative threshold, calculates all corresponding 4B threshold values of all transformats corresponding with present type of service.

Step S106, current business amount occupancy is during less than the pairing 4B threshold value of current transformat, described current business amount occupancy and the 4B threshold value that reduces transformat are one by one compared, when finding described current business amount occupancy less than the 4B threshold value that has reduced by j transformat and when having reduced the 4B threshold value of j+1 transformat, judgement is reduced the j level with speed.

Alternatively, in step S104, according to the set TFS={TF1 of the transformat corresponding with all types of service, TF2 ..., TFn} calculates 4B threshold value set 4BS={4B1,4B2 ..., 4Bn}.Transmission block number * the transport block size of 4Bn=(RTT/tti) * TFn correspondence * 4B relative threshold, wherein, RTT is that tti is dispatching cycle according to the fixed value of Loop Round Trip Time configuration.

Further, in step S106,, choose current transmission format subset TFs={TF1 according to the present rate state, TF2 ..., TFm}, wherein, m＜=n, and choose 4B threshold value subclass 4Bs={4B1,4B2 ..., 4Bm}.

Further, current business amount occupancy BO is during smaller or equal to 4Bm-1,4B threshold value among BO and the described 4B threshold value subclass 4Bs is compared, if 4Bm-j-1＜BO＜=4Bm-j, then adjudicate speed is reduced the j level, described current transmission format subset TFs is adjusted into { TF1, TF2, ..., TFm-j}.

Alternatively, in step S102, configuration 4B reporting events frequency threshold value.

Further, in step S104, according to the set TFS={TF1 of the transformat corresponding with all types of service, TF2 ..., TFn}, calculate 4B threshold value set 4BS={4B1,4B2 ..., 4Bn}, wherein, the transmission block number * transport block size of 4Bn=(RTT/tti) * TFn correspondence * 4B relative threshold, wherein, RTT is that tti is dispatching cycle according to the fixed value of Loop Round Trip Time configuration.

Further, in step S106,, choose current transmission format subset TFs={TF1 according to the present rate state, TF2 ..., TFm}, wherein, m＜=n, and choose 4B threshold value subclass 4Bs={4B1,4B2 ..., 4Bm}.

Further, dispose current 4B reporting events counter array 4BCounter={4BCounter (1), 4BCounter (2) ..., 4BCounter (m) }.

Further, determine speed downward modulation grade by following steps:

Step S202 as traffic carrying capacity occupancy BO during smaller or equal to 4Bm-1, reports the 4B incident, 4BCounter (1)=4BCounter (1)+1;

Step S204, the element j of detection BO correspondence in described 4B threshold value subclass 4Bs, described j satisfies 4Bj＞BO＞=4Bj-1;

Step S206,4BCounter (i)=4BCounter (i)+1, wherein, and i=j ..., m-1;

Step S208, detect the element 4BCounter (k) among the described 4B reporting events counter array 4BCounter, if there is 4BCounter (k)＞=4B reporting events frequency threshold value, maximizing K therein then, be judged to be speed downward modulation m-K level, with the described 4B reporting events counter array 4BCounter zero clearing that resets, described current transmission format subset TFs is adjusted into { TF1, TF2, ..., TFm-K} is back to step S106, otherwise is back to step S202.

This method for modulating down special channel speed is applied to broadband CDMA system.

The present invention relates to a kind of DCH channel speed downward modulation algorithm of WCDMA system, to improve WCDMA systematic function and sign indicating number resource utilization.Technical scheme is as follows:

1) backstage configuration 4B relative threshold Pth.

2) get the transformat TFS={TF1 of current signing service type correspondence, TF2 ..., TFn}, wherein TBNumn is the fast number of transmission of TFn correspondence.

3) the 4B relative threshold Pth that obtains according to the backstage of foreground calculates 4B thresholding set 4BS={4B1,4B2 ..., 4Bn}, computing formula is as follows:

${4B}_n=\frac{\mathrm{RTT}}{\mathrm{tti}}\×{\mathrm{TBNum}}_n\×\mathrm{TBSize}\×\mathrm{Pth}---\left(1\right)$

In the formula, RTT is according to a value of network Loop Round Trip Time configuration, generally, is arranged to 200ms, and tti is dispatching cycle.

4) when business is current when being in certain speed state, system can choose a suitable TFs according to the pairing TFS of class of service, be transmission format subset, be subclass, wherein a TFs={TF1 of TFS set, TF2 ..., TFm}, wherein 1＜=m＜=n according to m, chooses the 4B thresholding subclass 4Bs of current business state correspondence, be the subclass of 4B thresholding set 4BS, 4Bs={4B1 wherein, 4B2, ..., 4Bm}.

5) when system detects current business amount occupancy BO＜=4Bm-1, compare, if BO＜=4Bm-j﹠amp; ﹠amp; BO＞4Bm-j-1, j=1 wherein, 2 ..., m-2, speed downward modulation j level so, promptly system adjust professional current TFs be TF1, TF2 ..., TFm-j} reaches the actual conditions according to the current business amount, grasps the demand that speed is reduced grade flexibly.

Below in conjunction with Fig. 2 the enforcement of technical scheme is described in further detail:

1) system backstage configuration 4B relative threshold Pth, configuration 4B reporting events number of times thresholding 4B CounterThold.

2) according to the current business signing type, get corresponding service transmission format set TFS, TFS={TF1 wherein, TF2 ..., TFn} calculates professional corresponding 4B thresholding set 4BS={4B1 according to formula (1), 4B2 ..., 4Bn}.

3) suppose that current business speed is K bps, so, the transmission format subset of current business speed correspondence is TFs={TF1, TF2 ..., TFm}, wherein, 1＜=m＜=n.

4) according to current TFs, obtain current 4B thresholding subclass 4Bs={4B (1), 4B (2) ..., 4B (m) }, dispose current 4B reporting events counter array 4BCounter={4BCounter (1), 4BCounter (2) ..., 4BCounter (m) }=0.

5) to report the trigger condition of 4B incident be BO＜=4B (m-1) in system, after system reports the 4B incident, determines speed downward modulation grade according to following flow process:

A) with 4BCounter (m-1)=4BCounter (m-1)+1;

B) detect BO in the 4Bs set, corresponding element j, the 4B that satisfies condition (j)＞=BO＞4B (j-1), j=1 ..., m-1;

C) refresh counter value 4BCounter (1)=4BCounter (1)+1, wherein, 1=j ..., m-1;

D) detect element 4BCounger (k) among the 4B event counter array 4BCounter, k=1 wherein ..., m-1 seeks that minimum among 4BCounter (k)＞=4BCounterThold k value, is made as K, continues step e), otherwise redirect the 5th) go on foot;

E) carry out DCH channel speed downward modulation flow process, speed downward modulation progression is m-K, and the 4BCounter array is resetted clearly 0, jump procedure 3).

According to 3GPP TS 25.331 protocol definitions, report the 4B incident controlled by Trigger Timer and two timers of Pending Timer, in algorithm, the mode that Trigger Timer and Pending Timer control event trigger does not change, because in algorithm flow, the triggering of incident is triggered by last the element 4B (m) in the 4B thresholding subclass, and then adds up current triggering and reach which threshold level.If K=m-1, so, downward modulation stops, and changes other channel migration flow processs.

In addition, when reporting the 4A incident, all 4B counters clear 0 need be resetted.

In sum, this method can effectively raise the performance and the sign indicating number resource utilization of WCDMA system according to the grade that how much determines the speed downward modulation flexibly of current EMS memory occupation amount by adopting DCH dynamics of channels speed downward modulation algorithm.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (11)

1. a method for modulating down special channel speed is characterized in that, may further comprise the steps:

Step S102, configuration 4B relative threshold;

Step S104 according to described 4B relative threshold, calculates all corresponding 4B threshold values of all transformats corresponding with present type of service;

Step S106, current business amount occupancy is during less than the pairing 4B threshold value of current transformat, described current business amount occupancy and the 4B threshold value that reduces transformat are one by one compared, when finding described current business amount occupancy less than the 4B threshold value that has reduced by j transformat and when having reduced the 4B threshold value of j+1 transformat, judgement is reduced the j level with speed.

2. method for modulating down special channel speed according to claim 1 is characterized in that, in step S104, according to the set TFS={TF1 of the transformat corresponding with all types of service, TF2 ..., TFn} calculates 4B threshold value set 4BS={4B1,4B2 ..., 4Bn}.

3. method for modulating down special channel speed according to claim 2, it is characterized in that, 4Bn=(RTT/tti) * (the transmission block number of TFn correspondence) * transport block size * 4B relative threshold, wherein, RTT is that tti is dispatching cycle according to the fixed value of Loop Round Trip Time configuration.

4. method for modulating down special channel speed according to claim 2 is characterized in that, in step S106, according to the present rate state, chooses current transmission format subset TFs={TF1, TF2 ..., TFm}, wherein, m＜=n, and choose 4B threshold value subclass 4Bs={4B 1, and 4B2 ..., 4Bm}.

5. method for modulating down special channel speed according to claim 4, it is characterized in that, described current business amount occupancy BO is during smaller or equal to 4Bm-1,4B threshold value among BO and the described 4B threshold value subclass 4Bs is compared, if 4Bm-j-1＜BO＜=4Bm-j then adjudicates speed is reduced the j level, described current transmission format subset TFs is adjusted into { TF1, TF2 ..., TFm-j}.

6. method for modulating down special channel speed according to claim 1 is characterized in that, in step S102, and configuration 4B reporting events frequency threshold value.

7. method for modulating down special channel speed according to claim 6 is characterized in that, in step S104, according to the set TFS={TF1 of the transformat corresponding with all types of service, TF2 ..., TFn} calculates 4B threshold value set 4BS={4B1,4B2, ..., 4Bn}, wherein, 4Bn=(RTT/tti) * (the transmission block number of TFn correspondence) * transport block size * 4B relative threshold, wherein, RTT is that tti is dispatching cycle according to the fixed value of Loop Round Trip Time configuration.

8. method for modulating down special channel speed according to claim 7 is characterized in that, in step S106, according to the present rate state, chooses current transmission format subset TFs={TF1, TF2 ..., TFm}, wherein, m＜=n, and choose 4B threshold value subclass 4Bs={4B1, and 4B2 ..., 4Bm}.

9. method for modulating down special channel speed according to claim 8 is characterized in that, disposes current 4B reporting events counter array 4BCounter={4BCounter (1), 4BCounter (2) ..., 4BCounter (m) }.

10. method for modulating down special channel speed according to claim 9 is characterized in that, determines speed downward modulation grade by following steps:

Step S202 as traffic carrying capacity occupancy BO during smaller or equal to 4Bm-1, reports the 4B incident, 4BCounter (1)=4BCounter (1)+1;

Step S204, the element j of detection BO correspondence in described 4B threshold value subclass 4Bs, described j satisfies 4Bj＞BO＞=4Bj-1;

Step S206,4BCounter (i)=4BCounter (i)+1, wherein, and i=j ..., m-1;

Step S208, detect the element 4BCounter (k) among the described 4B reporting events counter array 4BCounter, if there is 4BCounter (k)＞=4B reporting events frequency threshold value, maximizing K therein then, be judged to be speed downward modulation m-K level, with the described 4B reporting events counter array 4BCounter zero clearing that resets, described current transmission format subset TFs is adjusted into { TF1, TF2, ..., TFm-K} is back to step S106, otherwise is back to step S202.

11., it is characterized in that described method for modulating down special channel speed is applied to broadband CDMA system according to each described method for modulating down special channel speed in the claim 1 to 10.

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