CN101656972A - Method and system for control of congestion in CDMA systems - Google Patents

Abstract

The present invention is a method and system for monitoring and controlling congestion in a CDMA system having multi-user detection capabilities. The method detects congestion in the uplink by calculating noise rise based on user equipment measurements or radio access network measurements. Upon detection of congestion, congestion relieving measures are implemented as needed.

Description

Be jammed in the cdma system method and system of control

It is dividing an application of 038116634 Chinese patent application that the application is based on application number.

Technical field

The present invention is relevant to code division multiple access (CDMA) system with multiple user's detecting (MUD) ability, wherein, the ability of this system can be subject to the interference that not deleted interior cell element disturbs (intra-cell interference), not deleted outer cell element interference (inter-cellinterference), reaches connection noise floor (noise floor).

Background technology

In code division multiple access (CDMA) system, a principal element of restriction system ability is to disturb.Generally speaking, code division multiple access (CDMA) system all can try interference is dwindled as much as possible.Known, power control is a kind of common method, and it can will disturb the upper limit to reduce as much as possible.Yet when code division multiple access (CDMA) when system wants to support numerous user, even through-put power has obtained control, but interference level but still can't be accepted fully.

Known, the idea of code division multiple access (CDMA) uplink (UL) limit ability (pole capacity) is widely used, and uses the time that the decision generation systems is jammed.This idea is to grow up based on the index of code division multiple access (CDMA) interference that system caused, that is: greater than all interference of noise floor.Code division multiple access (CDMA) interference that system caused is to be disturbed by interior cell element interference and outer cell element to form.It is that the user takies the interference that cell element produces that interior cell element disturbs.On the contrary, outer cell element disturbs and then is not to use the person to take cell element outside, interference that each power supply produced.Limit ability (pole capacity) is theoretic maximum capacity, supposes that each running gear all can have infinitely-great through-put power.Typically, practical capacity only accounts for certain ratio of limit ability (pole capacity).Though this idea is applied in code division multiple access (CDMA) system of point-to-multipoint (point-to-multipoint) through regular meeting; but; the use of the receiver inside that cell element disturbs in the deletion, multiple user detecting (MUD) also may change the basic principle that this idea is dependent on, and makes this idea become no longer suitable.

In view of this, main purpose of the present invention is that a kind of method is provided, and uses in code division multiple access (CDMA) system with multiple user detecting (MUD) ability the amount of the commenting phenomenon of being jammed.

Summary of the invention

The present invention is relevant for a kind of method and system, it is based on user's equipment (UE) measurement of code division multiple access (CDMA) system with multiple user's detecting (MUD) ability or radio access network (RAN) measurement, uses the phenomenon of being jammed of monitoring and control uplink.

Description of drawings

The 1st figure is the flow chart of a kind of method of expression, and it is according to preferred embodiment of the present invention, based on user's equipment (UE) measurement of code division multiple access (CDMA) system with multiple user's detecting (MUD) ability, uses the phenomenon of being jammed of monitoring uplink.

The 2nd figure is the flow chart of a kind of method of expression, it is according to preferred embodiment of the present invention, radio access network (RAN) based on code division multiple access (CDMA) system with multiple user's detecting (MUD) ability measures, and uses the phenomenon of being jammed of monitoring uplink.

The 3rd figure is the flow chart of a kind of method of expression, and it is according to preferred embodiment of the present invention, uses that carrying out is jammed removes measures.

The 4th figure is a kind of system of expression, and it is according to preferred embodiment of the present invention, measures based on user's equipment (UE), uses the phenomenon of being jammed of monitoring and control uplink.

The 5th figure is a kind of system of expression, and it is according to preferred embodiment of the present invention, measures based on radio access network (RAN), uses the phenomenon of being jammed of monitoring and control uplink.

Embodiment

With regard to the phenomenon detecting of being jammed based on the uplink (UL) of user's equipment (UE) measurement, regular code division multiple access (CDMA) system (that is: limit ability (pole capacity) code division multiple access (CDMA) system that does not have multiple user's detecting (MUD) ability) can be determined that it is that integral body is discovered the ratio of disturbing the relative noise benchmark by the measurement of noise rising.

Noise_Rise＝Total_Perceived_Interference/Noise_Floor＝1/(1-ηUL)

(1)

Wherein, integral body is discovered whole not deletion interference that interference (total perceived interference) is a receiver, and it has simultaneously: interior cell element disturbs and outer cell element disturbs; Noise floor (noise floor) is the whole noises with code division multiple access (CDMA) system independence, such as: thermal noise; And symbol (η _UL) then be uplink (UL) load-factor.Yet in code division multiple access (CDMA) system with multiple user's detecting (MUD) ability, cell element disturbed (I in multiple user's detecting (MUD) ability may be dwindled _Or) and amplify outer cell element and disturb (I _Oc).Therefore, rise uplink (UL) load-factor η for the noise that accurately measures code division multiple access (CDMA) system with multiple user's detecting (MUD) ability _ULShould compensate multiple user's detecting (MUD) disturbing effect that ability caused.

In order to compensate multiple user's detecting (MUD) disturbing effect that ability caused, uplink (UL) load-factor η particularly _ULThe meeting definition also adds two parameters, and wherein, a parameter is that cell element disturbs (I in being used for compensating _Or) dwindle, another parameter then is to be used for compensating outer cell element to disturb (I _Oc) amplification.First parameter, α _UL, be that cell element disturbs (I in the expression deletion _Or) whole relatively interior cell element interference (I _Or) average proportions and can be used for compensating in cell element disturb (I _Or) minimizing.Second parameter, β _UL, then be that expression receives outer cell element interference (I _Oc) whole relatively outer cell element interference (I _Oc) average proportions and can be used for compensating outer cell element and disturb (I _Oc) increase.According to preferred embodiment of the present invention, first parameter, α _UL, and second parameter, β _UL, all can optionally measure, calculate or suppose.Cell element disturbs (I in utilizing _Or), outer cell element disturbs (I _Oc), first parameter alpha _UL, and second parameter beta _UL, the integral body of multiple user's detecting (MUD) ability is discovered interference (total perceived interference) and can be expressed as:

(1-α _UL)I _or+(1-β _UL)I _oc

In first preferred embodiment of the present invention, the phenomenon of being jammed detecting is to measure based on user's equipment (UE).Yet with respect to code division multiple access (CDMA) interference that system produced, cell element disturbed (I in user's equipment (UE) measured and only can be limited in _Or) scope in.Therefore, disturb (I in order to compensate outer cell element _Oc), uplink (UL) load-factor η _ULCan be expressed as:

${\mathrm{\η}}_{\mathrm{UL}}=(1+i){\mathrm{\Σ}}_{j=1}^{N}1/(1+W/{\mathrm{\ρ}}_j{R}_j{v}_j)---\left(2\right)$

Wherein, i is that the outer cell element of expression disturbs (I _Oc) internally cell element disturbs (I mutually _Or) the predetermined value of ratio, summation then is that cell element disturbs (I in the expression _Or).In summation, N is user's number of expression cell element the inside; W is an expression carrier wave frequency range; And ρ _j, R _j, and v _jThen be the signal noise ratio (E that represents j user respectively _b/ N ₀), bit rate, and activity factor.Interior cell element is disturbed (I _Or) multiply by (1+i) and can obtain (I _Or+ I _Or(i)), wherein, I _Or(i)=I _Oc, use making interior cell element interference and the interference of outer cell element all can utilize uplink (UL) load-factor η _ULCompensation.Shown in equation (1), as uplink (UL) load-factor η _ULDuring convergence 1, the noise rising can level off to infinity.

When calculating uplink (UL) load-factor η _ULAfter, noise rises and just can be expressed as:

${\mathrm{Noise}\_\mathrm{Rise}}_{\mathrm{dB}}=-10\×\log [1-(1-{\stackrel{\‾}{\mathrm{\α}}}_{\mathrm{UL}}+i+{\stackrel{\‾}{\mathrm{i\β}}}_{\mathrm{UL}}){\mathrm{\Σ}}_{j=1}^{N}1/(1+W/{\mathrm{\ρ}}_j{R}_j{v}_j)]$

(3)

In the 1st figure, based on user's equipment (UE) measurement of code division multiple access (CDMA) system with multiple user's detecting (MUD) ability, the step of the phenomenon of being jammed of monitoring uplink (UL) is as shown in FIG. and is expressed as legend 10.

This method can be by step 12 beginning, and it preferably can utilize equation (2) to calculate uplink (UL) load-factor η _UL, as discussed previously.Then, step 14 preferably can utilize equation (3) calculating noise to rise, and is as discussed previously.Noise rising numerical value can be proportional to the phenomenon of being jammed, and whether its meeting amount of commenting in step 16 is used decision and should be implemented to be jammed to remove measures.If noise rising numerical value is greater than predetermined value, then step 18 just can be implemented to be jammed to remove measures.In preferred embodiment of the present invention, triggering the predetermined noise rising numerical value that removes measures that is jammed can be any numerical value.For instance, in a preferred embodiment, predetermined noise rising numerical value can the boundary in the middle of about 6dB and about 10dB.

On the contrary, if noise rising numerical value is less than the predetermined noise numerical value that rises, then this method just can be restarted by step 12.This method can just be restarted by step 12 every predetermined time interval.Depending on the circumstances or the needs of the situation, this predetermined time interval can also be an any time quantity.For instance, in a preferred embodiment, this time interval can the boundary in the middle of about 3sec and about 5sec.

In another preferred embodiment of the present invention, uplink (UL) is jammed to detect and can also be based on radio access network (RAN) measurement.In this preferred embodiment, outer cell element disturbs (I _Oc) and interior cell element interference (I _Or), and first parameter alpha _ULAnd second parameter beta _ULAll can read the measurement that base station (BS) provided and determined.Therefore, with respect to first preferred embodiment, uplink (UL) load-factor η _ULReach the noise rising and just can calculate, and do not need to use predetermined value to disturb (I to obtain outer cell element _Oc).

Particularly, uplink (UL) load-factor η _ULCan be expressed as:

η _UL＝1-Noise_Floor/Total_Perceived_Interference(4)

Wherein, noise floor (Noise Floor) is the whole noises with code division multiple access (CDMA) system independence, and integral body to discover interferences (Total Perceived Interference) be the whole deletion interference that comprise receiver.Because it is known that calculating integral body is discovered the needed assembly of interference (Total PerceivedInterference), therefore, integral body is discovered interference (Total PerceivedInterference) and can be expressed as:

(1-α _UL)I _or+(1+β _UL)I _oc

Use and make uplink (UL) load-factor η _ULCan be expressed as:

η _UL＝1-Noise_Floor/〔(1+β _UL)I _oc+(1-α _UL)I _or〕(5)

When calculating uplink (UL) load-factor η _ULAfter, effective noise rises and just can be expressed as:

Noise_Rise _dB＝10×log〔((1+β _UL)Ioc+(1-α _UL)I _or)/Noise_Floor〕

(6)

In the 2nd figure, radio access network (RAN) based on code division multiple access (CDMA) system with multiple user's detecting (MUD) ability measures, and the step that measures and avoid the phenomenon of being jammed of uplink (UL) is as shown in FIG. and utilizes diagrammatical symbol 50 expressions.

At first, first step 52 is the measurement noise benchmark.Then, step 54 preferably can calculate uplink (UL) load-factor η according to equation (5) _UL, as discussed previously, wherein, outer cell element disturbs (I _Or), interior cell element disturbs (I _Oc), the first parameter (α _UL), and the second parameter (β _UL) can read the measurement that base station (BS) provided and defined.Yet, in another preferred embodiment, ratio α _ULCan also be expressed as:

${\stackrel{\‾}{\mathrm{\α}}}_{\mathrm{UL}}\≈\left\{{\mathrm{\Σ}}_{i=1}^M\right[1-[({\stackrel{\‾}{\mathrm{Rx}\_\mathrm{Code}\_\mathrm{Power}}}_i\·{\mathrm{SF}}_i)/({\stackrel{\‾}{\mathrm{SIR}}}_i-{\stackrel{\‾}{I_{\mathrm{oc}}}}_i)]/$

$[(\stackrel{\‾}{\mathrm{Total}\_\mathrm{Perceived}\_\mathrm{Interference}}-{\stackrel{\‾}{I_{\mathrm{oc}}}}_i)-{\stackrel{\‾}{\mathrm{Rx}\_\mathrm{Code}\_\mathrm{Power}}}_i]\}/M$

(7)

In this preferred embodiment, second parameter beta _ULCan ignore, use the demand that reads via base station (BS) receiver of saving.Other represented parameter of equation (7) is to utilize the resulting measurement of base station (BS) to be discerned and define.For instance, other included parameter of equation (7) receiving code power Rx_Code_Power that is i user _i, i user's spreading factor SF _i, and the active number of codes M of each time slot.

When calculating uplink (UL) load-factor η _ULAfter, step 56 just can rise according to equation (6) calculating noise.Shown in the preferred embodiment of the 1st figure, noise rising numerical value can be proportional to the phenomenon of being jammed.Therefore, whether noise rising numerical value just can be used decision and should be implemented to be jammed to remove measures in the amount of commenting in the step 58.If noise rising numerical value is greater than predetermined value, then step 60 can be implemented to be jammed to remove measures.Otherwise less than predetermined value, then this method can be restarted by step 52 every predetermined time interval as if noise rising numerical value.Shown in the preferred embodiment of the 1st figure, predetermined noise rising numerical value and predetermined time interval can be any numerical value, depend on the circumstances.

Being jammed removes measures can utilize several execution modes to finish.For instance, specific user's signal noise ratio (E _b/ N ₀) target can reduce, use and force those users to reduce its through-put power.Yet the shortcoming of this method is: those users may experience the transmission error in data, and the link quality also can significantly reduce.

Be jammed a kind of preferred approach of phenomenon of releasing is to reduce specific user's data transmission rate.The user can use its through-put power of decision according to data transmission rate, spreading factor gain, maximum transmission power, and path loss.So, reduce specific user's data transmission rate (reduction of its hint power) and just can utilize identical exhibition to increase frequently, still utilize lower power, reach identical signal noise ratio.In addition, in Wideband-CDMA (WCDMA) time division duplex (TDD) system, reducing data transmission rate can hint: specific user will can not transmitted in the time slot the inside, and then obtain the added advantage that time slot is jammed and removes.

The be jammed preferred approach of phenomenon of releasing can limit the data transmission rate of power supply; Therefore, this method will no longer need any transmission again.It is to consider through-put power, received power, and the grade of service that the user who reduces data transmission rate selects.Those factors can be considered according to each user, and can also be individually, venue or part consider in combination, depend on the circumstances.The user who has maximum interference contribution and have lowest service level priority preferably can select as the candidate user who reduces data rate.

The be jammed preferred approach system of phenomenon of releasing is illustrated among the 3rd figure, and utilizes diagrammatical symbol 100 expressions.At the beginning, step 102, step 104, and step 106 can determine each user's through-put power, received power, and the grade of service respectively.Subsequently, in step 108, each user's noise rises to contribute and just can calculate.As discussed previously, noise rises and can calculate according to equation (3) or equation (6), depending on the circumstances or the needs of the situation decides.

In step 110, having the user that maximum noise rises contribution and have lowest service level priority can be selected.In order to determine this to select the user, each parameter can be utilized predetermined weighted factor.It should be noted that weighted factor can use any numerical value, use to make and select user's priority and noise contribution optionally to adjust.In addition, we can also only use single parameter.Perhaps, we can also use additional parameter (such as noise contribution and priority), and it can also be optionally and weighting.It is perfectly elastic selecting user's criterion, and can be accurately to discern any criterion with the user that can reduce data transmission rate, uses and reduces the phenomenon of being jammed.Therefore, select the user just can, for instance, be expressed as:

User_Selected＝W1(priority)+W2(noise?contribution)(8)

In step 112, select user's data transmission rate to reduce.Whether in step 113, the quantity of being jammed can be estimated, use decision and implemented to be jammed to remove measures.Be enough to the noise numerical value that rises is reduced to below the predetermined value that can detect the phenomenon of being jammed if the correspondence that noise rises reduces, just then this method can the result, and the being jammed control shown in the 1st and 2 figure can also continue (step 114).Perhaps, if not implementing to be jammed as yet removes measures, use that noise rising numerical value is reduced to below the predetermined value, the phenomenon of then being jammed will exist, and this method 100 then can be returned step 110 or 102, depending on the circumstances or the needs of the situation decides, and continue to carry out, phenomenon can be removed fully up to being jammed.

Now, please refer to the 4th figure, it is a kind of system 200 of expression.This system 200 can measure based on user's equipment (UE), uses and carries out the control of being jammed.In system 200, the phenomenon of being jammed of uplink (UL) is to utilize user's equipment (UE) to measure to monitor and control.This system 200 can have at least one 202, base station of user's equipment (UE) (BS) or B node 214, reach a radio network controller 210.

User's equipment (UE) comprises that a receiver with multiple user detecting (MUD) ability 203, an interior cell element disturb (I _Or) measuring equipment 204, and an interior cell element disturb (I _Or) dispensing device 206.Interior cell element disturbs (I _Or) measuring equipment 204 can be provided by user's equipment (UE) 202 information that provided, and measures the cell element the inside that user's equipment (UE) 202 takies, the amount of interference that this system produced.As discussed previously, it is that cell element disturbs (I in being called that this class is disturbed _Or).

Base station (BS) or B node 214 comprise that a receiver 205 and the interior cell element with multiple user's detecting (MUD) ability disturbs (I _Or) signal receiver 208.Interior cell element disturbs (I _Or) the interior cell element that measured of measuring equipment 204 disturbs (I _Or) can disturb (I by the interior cell element of user's equipment (UE) 202 _Or) the dispensing device 206 interior cell element that transfers to base station (BS) or B node 214 disturbs (I _Or) signal receiver 208.Base station (BS) or B node 214, if need, cell element disturbs (I in can handling _Or), use obtaining overall interference, as multiple user's detecting (MUD) interference that ability influenced.As discussed previously, cell element disturbed (I in overall interference can be utilized _Or), first parameter alpha _UL, second parameter beta _UL, and i obtained.

After calculating overall interference, uplink (UL) load-factor η _ULAnd the noise rising just can also calculate.If noise rises greater than predetermined value, then each user's noise rising contribution just can measure and obtain.The preferably, each user's through-put power, received power, and the grade of service can also measure and obtain.The user's data transmission rate that has maximum noise rising contribution and lowest service level priority at present can optionally reduce, and rising up to overall noise is reduced to below the predetermined value.In other words, still be not enough to noise risen and be reduced to below the predetermined value if having rise user's data transmission rate of contribution of maximum noise, the noise that then this method just can continue to recomputate each user rise contribution, and reduce and have rise user's data transmission rate of contribution of maximum noise.Perhaps, this method can also continue to utilize present user's calculating, also only reduction has user's data transmission rate that inferior big noise rising is contributed.

In the 5th figure, it is the another kind of preferred embodiment of the control system of being jammed of expression uplink (UL), and it is to utilize diagrammatical symbol 300 expressions.In system 300, the phenomenon of being jammed of uplink (UL) is to utilize radio access network (RAN) to measure to monitor and control.This system 300 cordings have at least one 301, base station of user's equipment (UE) (BS) or B node 306, reach a radio network controller (RNC) 308.

User's equipment (UE) 301 comprises a receiver 303 with multiple user's detecting (MUD) ability.Base station (BS) or B node 306 comprise that a receiver with multiple user detecting (MUD) ability 305, an interior cell element disturb (I _Or) measuring equipment 302, and outer cell element interference (I _Oc) measuring equipment 304.Cell element disturbed (I in base station (BS) or B node 306 can transmit _Or) and outer cell element interference (I _Oc) to radio network controller (RNC) 308 with RRM (RRM) device 310.RRM (RRM) device 310, ligand platform (BS) or B node 306, cell element disturbs (I in can optionally handling _Or) and outer cell element interference (I _Oc), use obtaining overall interference, as multiple user's detecting (MUD) ability 303 and 305 interference that influenced.As discussed previously, cell element disturbed (I in overall interference can also be utilized _Or), outer cell element disturbs (I _Oc), first parameter alpha _UL, and second parameter beta _ULCalculate.

After calculating overall interference, uplink (UL) load-factor η _ULAnd noise rises and can also calculate.If noise rises greater than predetermined value, then each user's noise rising contribution can also calculate.The preferably, each user's through-put power, received power, and the grade of service can also measure and obtain.The user's data transmission rate that has maximum noise rising contribution and lowest service level priority at present can optionally reduce, and rising up to overall noise can be reduced to below the predetermined value, as described in the 4th figure.

Though the present invention has utilized preferred embodiment to describe in detail as above.Yet, haveing the knack of this operator when understanding, the present invention also needn't be limited to specific preferred embodiment.And,, have the knack of this technology and can also carry out various may the change and adjust each preferred embodiment of the present invention under the prerequisite of spirit of the present invention and scope.Therefore, protection scope of the present invention is when being as the criterion with following Patent right requirement.

Claims (22)

1. user's equipment is provided with to be used for carrying out the control of being jammed in a code division multiple access (CDMA) system with multiple user's detectability, and described user's equipment comprises:

One receiver has multiple user's detectability;

Cell interferometry device in one; And

Cell interference dispensing device in one is provided with cell interference signals in the transmission indication, and the control survey of being jammed is based on described interior cell and disturbs;

Described receiver setting with:

Based on the interior cell interference calculation one noise rising numerical value of measuring; And

When the noise rising numerical value that is calculated surpasses a predetermined threshold, carry out the described control survey of being jammed.

2. user's equipment as claimed in claim 1, it is characterized in that, described receiver is to be provided with institute's transmission signals of cell interference in the response indication to receive the control signal of being jammed, cell disturbs a transmission rate that causes at this user's equipment to reduce in described user's equipment has maximum noise rising contribution and has lowest service level priority, is described.

3. user's equipment is provided with to be used for carrying out the control of being jammed in a code division multiple access (CDMA) system with multiple user's detectability, and described user's equipment comprises:

One receiver has multiple user's detectability;

Cell interferometry device in one; And

Cell disturbs dispensing device in one, and setting is with cell interference signals in the transmission indication, and the control of being jammed is based on described interior cell and disturbs.

4. user's equipment as claimed in claim 3 is characterized in that, described receiver is that setting is indicated institute's transmission signals of interior cell interference and received the control signal of being jammed with response, and described interior cell disturbs the transmission rate reduction that causes at this user's equipment.

5. a base station has multiple user's detectability, and described base station comprises:

Cell signal receiver in one is in order to disturb from received an interior cell of measuring by the user's equipment the cell of this base station services; And

One radio network controller, comprise a wireless resource management apparatus, be used for calculating a noise rising numerical value based on the contribution that interior cell disturbs and outer cell disturbs that is received, and wherein, described radio network controller uses about outer cell and disturbs mutually internally one first predetermined value of the ratio of cell interference, and when working as the noise rising numerical value that calculated greater than one second predetermined value, carrying out is jammed removes measures.

6. base station as claimed in claim 5 is characterized in that, when calculating described noise rising numerical value, described wireless resource management apparatus compensates the effect of described multiple user's detectability.

7. base station as claimed in claim 5 is characterized in that, described be jammed to remove measures comprise:

One grade of service of all user's equipment of decision and described base station communication;

A noise that calculates each user's equipment rises and contributes;

Select to have user's equipment that maximum noise rises contribution and has lowest service level priority at present; And

Adjust the transmission parameter of user's equipment of selecting.

8. base station as claimed in claim 7 is characterized in that, a data transmission rate of user's equipment of selection is adjusted.

9. base station as claimed in claim 7 is characterized in that, a signal noise ratio target of user's equipment of selection is adjusted.

10. one kind in order to be controlled at the method for being jammed in a code division multiple access (CDMA) system with multiple user's detectability, and this method comprises:

The interior interior cell of a cell of measuring user's equipment place disturbs;

Disturb and the contribution of an outer cell interference and calculate a noise rising numerical value based on the interior cell of measuring, the contribution that outer cell disturbs be beyond cell disturb mutually one first predetermined value of the ratio that internal cell disturbs and be considered, the noise rising numerical value that is wherein calculated is indicated the interference in the described system;

Monitoring this noise rising numerical value is jammed with detection; And

Detecting when being jammed, carrying out to be jammed removing measures based on described noise rising numerical value, wherein, the effect of described multiple user's detectability causes in one cell to disturb to reduce and an outer cell disturbs increase.

11. method as claimed in claim 10 is characterized in that, the step of calculating a noise rising numerical value comprises:

Compensate the disturbing effect that multiple user's detectability of this code division multiple access system is caused.

12. method as claimed in claim 10, wherein said be jammed to remove measures comprise:

One grade of service of all user's equipment of decision and described base station communication;

A noise that calculates each user's equipment rises and contributes;

Select to have user's equipment that maximum noise rises contribution and has lowest service level priority at present; And

Adjust the transmission parameter of user's equipment of selecting.

13. one kind in order to be controlled at the method for being jammed in a code division multiple access (CDMA) system with multiple user's detectability, this method comprises:

Measure noise floor;

Disturb and an outer cell of measuring disturbs and calculates a noise rising numerical value based on an interior cell of measuring, the noise rising numerical value that is wherein calculated is the interference of the described system of expression;

Monitoring this noise rising numerical value is jammed with detection; And

Detecting when being jammed, carrying out to be jammed removing measures based on described noise rising numerical value, wherein, the effect that described multiple user's detectability causes interference is that cell disturbs and reduces and an outer cell disturbs increase in one, and this is jammed to remove measures and comprises:

One grade of service of all user's equipment of decision and described base station communication;

A noise that calculates each user's equipment rises and contributes;

Select to have user's equipment that maximum noise rises contribution and has lowest service level priority at present; And

Adjust the transmission parameter of user's equipment of selecting.

14. one kind in order to be controlled at the method for being jammed in the wireless communication system, this method comprises:

Calculate noise rising, it embodies multiple user and detects the effect that an interior cell that is caused disturbs a reduction and an outer cell interference to increase;

Determine described noise to rise and whether be lower than a predetermined threshold; And

When the described noise rising of decision was not lower than described predetermined threshold, execution one was jammed and is removed measures.

The measured interior cell of the user's equipment that is based on disturbs 15. method as claimed in claim 14, this noise of wherein said calculating rise.

16. method as claimed in claim 15 is wherein used the predetermined ratio that cell in this is disturbed to calculate an outer cell and is disturbed.

17. rising, method as claimed in claim 14, this noise of wherein said calculating be based on a measured interior cell interference in a base station and an outer cell interference.

18. method as claimed in claim 14, wherein this adjustment of a target sir of the reduction of the transmission rate that comprises user's equipment and user's equipment of removing measures of being jammed.

19. method as claimed in claim 18 is wherein carried out the step that removes measures of being jammed and is comprised:

The noise that calculates each user's equipment rises and contributes;

Selection has one first user's equipment of maximum contribution; And

Reduce a transmission rate of this first user equipment.

20. method as claimed in claim 19 more comprises:

After this transmission rate that reduces this first user equipment, the noise that calculates each user's equipment once more rises and contributes;

Selection has one second user's equipment that maximum noise rises and contributes; And

Reduce a transmission rate of this second user equipment.

21. method as claimed in claim 19 more comprises:

Still be not less than this predetermined threshold if this noise rises, then select to have once another user's equipment that big noise rises and contributes; And

Reduce a transmission rate of this selecteed user's equipment.

22. method as claimed in claim 19 when wherein reducing transmission rate in this first user equipment of selection, is further considered a grade of service of each user's equipment.

Images