CN102547949A - Power control method and device in mobile communication system - Google Patents
Power control method and device in mobile communication system Download PDFInfo
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Abstract
The embodiment of the invention discloses a power control method and a power control device in a mobile communication system. The method comprises the following steps of: detecting a function relation between the signal-interference ratio (SIR) of a received signal and the transmitting power P of transmitting the signal; and when the function relation is that the SIR is decreased along with the increase of the transmitting power P, stopping increasing the transmitting power P. The interference vicious circle caused by continuous rising of the power for resisting the mutual interference between UE (User Equipment) is avoided.
Description
Technical field
The present invention relates to mobile communication technology, relate in particular to Poewr control method and device in a kind of GSM.
Background technology
The target of in GSM, carrying out power control is: under the condition that guarantees user communication quality, make the transmitting power of subscriber equipment (UE) and base station (NodeB) as far as possible little.For this reason; Must make the transmitting power of each UE satisfy transmitting of UE as far as possible can reach when arriving NodeB and guarantee the required minimum signal to noise ratio of communication quality; And guarantee regardless of NodeB distance and channel variation; Can both obtain identical received power at the NodeB end, promptly offset " near-far interference ".
Present Poewr control method generally is on the basis that the reception signal energy or the demodulation signal to noise ratio index of receiver end are assessed, the decline of introducing in the timely compensation wireless channel.Through power control, can either keep high-quality communication, other user in the same Radio Resource is not produced interference again, guaranteed power system capacity; Simultaneously,, can reduce the power consumption of UE through power control, thus the stand-by time that prolongs UE.
Be example with the TD-SCDMA system below, existing Poewr control method is described in detail.
The TD-SCDMA system is an interference limiting system, and interference is to cause one of TD-SCDMA systematic function main reasons for decrease.Different with other cdma systems is: the interference of TD-SCDMA mainly is the interference from co-frequency neighbor cell.In the TD-SCDMA system, exist nonideal correlation properties between the employed spreading code of each user, " near-far interference " problem is outstanding especially.Therefore, power control will directly have influence on the total capacity of TD-SCDMA system.
In the TD-SCDMA system, use open Loop Power control and closed power control way of combining to realize power control.Wherein, the purpose of closed-loop power control is the transmitting power of each UE of adjustment, reduces the influence of near-far interference, guarantees that as far as possible the power that NodeB receives all UE all equates, thereby makes each user can both satisfy the service quality (Qos) of transport service.
Closed power control is used for the RRC connection mode, can be divided into two control rings again.Control ring between RNC and the NodeB is called exterior ring power control, and the control ring between NodeB and the UE is called inner loop power control, introduces respectively below:
1, exterior ring power control:
Along with the variation of mobile communication environment and the variation of translational speed; Signal interference ratio (the Signal to Interference Ratio that the service needed of transmission satisfies; SIR) also to change, under different multi-path environments, sir target value (the Signal to Interference Ratio target that needs; SIRtarget) also change, therefore need to confirm SIRtarget through exterior ring power control.And up SIRtarget is by the network side appointment, and the SIRtarget value that might the initial appointment of network side and the signal interference ratio of current business actual needs differ more, all need adjust SIRtarget through exterior ring power control under these situation.
The basic ideas of outer-loop power controlling method are: adjust the SIRtarget that inner loop power is controlled according to the quality of communication, make system can satisfy the requirement of communication quality all the time with minimal power.Wherein, the fair of communication weighed with the Block Error Rate (BLER) that receives signal.
Particularly, in outer-loop power controlling method, the BLER of detected transmission channel (DPCH) according to predefined target Block Error Rate (BLERtarget), according to following rule, adjusts SIRtarget, makes the BLER that obtains approach predefined BLERtarget:
If actual measurement BLER＞BLERtarget then adjusts upward SIRtarget.
If actual measurement BLER＜BLERtarget then adjusts SIRtarget downwards.
The exterior ring power control module receives the propagation channel quality assessment as input, gives the up inner-loop power control target setting value SIRtarget that is positioned at NodeB, is used for the long-term quality control of wireless channel.
During concrete the realization, the layer 2 of RNC utilizes BLERtarget, the BLER actual value of setting through calculating, and calculates SIRtarget, SIRtarget is issued NodeB do inner loop power control.
2, inner loop power control:
In 3GPP TS 25.214, provided the method for inner loop power control: for up link; At first NodeB carries out sir measurement to the every wireless links that receives and obtains measured value SIRest; Compare with the required satisfied SIRtarget of business then; If SIRest＞=SIRtarget, then NodeB sends the transmitting power that is used to indicate this UE to reduce transmitting power at descending control channel to UE and controls (Transmitted Power Control, TPC) order; If SIRest＜SIRtarget, then NodeB sends the TPC order that is used to indicate UE increase transmitting power at descending control channel to UE; UE judges it is to increase transmitting power or reduce transmitting power according to the power control algorithm of TPC order that receives and network layer appointment then.
The basic ideas of inner loop power control method: according to SIRest and SIRtarget comparative result, the transmitting power of adjustment UE, thus realize adjustment to SIR, make SIR approach SIRtarget.Particularly, if SIRest is lower than SIRtarget, then lifting transmitting power improves SIR by this; If SIRest is higher than SIRtarget, then reduce transmitting power, reduce SIR by this.
The production method of TPC order at present is: if SIRest＞SIRtarget, the TPC that transmits so order is " 00 "; If SIRest＜=SIRtarget, the TPC that transmits so order is " 11 ".
The power of up dedicated channel or shared physical channel is set in inner loop power control.In 1.28Mcps TDD, this is a closed loop procedure.
Inner loop power control can be divided into uplink closed loop and the control of downlink closed-loop power.
The uplink closed loop process comprises: NodeB receives the SIRtarget from ascending exterior ring power control; And the SIRest of up proprietary or shared channel; Confirm the TPC order according to SIRest and SIRtarget, this TPC order is mail to UE through descending proprietary or shared physical channel.
The control of downlink closed-loop power is identical with up inner loop power control principle.UE confirms the TPC order according to the comparative result of coefficient correlations such as channel measurement amount and demodulation threshold, and UE issues NodeB with the TPC order then.
Visible by such scheme, there is a comparatively serious problem in existing Poewr control method, promptly disturbs vicious circle.
For real system, under some scene, for example cover edge or minizone in the sub-district overlapping covered down; There is inter-user interference; And then will be owing to vying each other and the situation of emergent power lifting between the user, even still this moment, UE increased transmitting power, because the competition between UE causes the interference between UE also to increase; Therefore the SIR of UE can not improve; SIR still can't reach business demand, so can NODEB occur or UE improves constantly transmitting power, the situation of launching with maximum power until NODEB or UE.
For example, UE1 improves constantly its uplink transmission power, with the interference of antagonism UE2 to UE1; Simultaneously, UE2 also improves constantly its uplink transmission power, with the interference of antagonism UE1 to UE2; So circulation; Final UE1 and UE2 all launch with full power, and the interference between UE1 and UE2 is very big, but the quality of service of UE1 and UE2 still can't guarantee.
At present, in some producer's equipment, adopt being provided with of power threshold parameter to suppress above-mentioned interference vicious circle, for example:
The downlink power control algorithm of certain equipment producer adopts " the maximum down transmitting power that an allows " parameter setting, is used to limit down transmitting power and can not surpasses this thresholding, prevents under similar above-mentioned environment the continuous lifting of descending power.
Uplink power control algorithm in the HSUPA system is provided with noise rising (RoT) thresholding, is used to limit the received power upper limit that base station side allows, and be in order to be controlled under the above-mentioned like environment the continuous lifting of ascending power equally.
To up DPCH dedicated channel, similarly " the up maximum received power that an allows " thresholding is set, can improve uplink interference effectively when big, the further deterioration of wireless environment.
No matter adopt above-mentioned the sort of parameter limit method, in case setting all can not be used in the professional process the user and change, therefore all can't adapt to different scenes, all can under some scene, cause the vicious circle of disturbing increase and network quality to descend owing to parameter.
Summary of the invention
In view of this, the invention provides Poewr control method and device in a kind of GSM, to avoid owing to continuous lifting power causes disturbing vicious circle in order to resist interference each other between UE.
Technical scheme of the present invention specifically is achieved in that
Poewr control method in a kind of GSM, this method comprises:
Functional relation between the signal interference ratio (SIR) that detect to receive signal and the transmitting power P that launches this signal when to be said SIR along with the increase of said transmitting power P reduce, stops to increase said transmitting power P in said functional relation.
Output control device in a kind of GSM, this device comprises detection module and control module;
Said detection module is used to detect the functional relation between SIR that receives signal and the transmitting power P that launches this signal;
Said control module is used for when to be said SIR along with the increase of said transmitting power P reduce, stopping to increase said transmitting power P in said functional relation.
Visible by technique scheme; The present invention is when carrying out power control; At first detect the functional relation between SIR that receives signal and the transmitting power P that launches this signal; When said SIR reduces along with the increase of said transmitting power P, stop to increase said transmitting power P, and do not distinguish the SIR of reception signal and the functional relation between the transmitting power P in the prior art; But the scheme that when the SIR that receives signal does not reach SIRtarget, increases transmitting power P simply compares, can avoid since between UE in order to resist interference and the constantly interference vicious circle that causes of lifting power each other.
Description of drawings
Fig. 1 is uplink downlink SIR and the graph of relation of transmitting power P under the different scenes.
Fig. 2 is the Poewr control method flow chart in the GSM provided by the invention.
Fig. 3 is the inner loop power control method flow chart of up link.
Fig. 4 is the inner loop power control method flow chart of down link.
Fig. 5 is an output control device structure chart provided by the invention.
Embodiment
Under different scene, for example communication environment or communications status not simultaneously, the relation of the SIR of radio link quality and transmitting power P changes according to scene.Usually the scene that can be divided three classes, scene one is that the uplink downlink quality is fine, and scene two is that uplink downlink is fair, and scene three is the uplink downlink poor quality.Under every type of scene, the relation of uplink downlink SIR and transmitted power P is as shown in Figure 1.
Fig. 1 is uplink downlink SIR and the graph of relation of transmitting power P under the different scenes.
As shown in Figure 1, for scene one and scene two, the SIR of up-downgoing radio link quality increases along with the increase of transmitting power P.And for scene three, originally along with the increase of transmitting power P, SIR also increases thereupon, but after SIR increased to certain value subsequently, along with the increase of transmitting power P, SIR reduced on the contrary.For example, cover the zone that edge or minizone overlapping is serious and interference is bigger in the sub-district, all have increase, receive the phenomenon that signal SIR reduces on the contrary along with transmitting power P.
So, can power control be divided into normality district and abnormal district for scene three, wherein, the zone that SIR increases along with the increase of transmitting power P is the normality district, on the contrary the zone that SIR reduces along with the increase of transmitting power P is called abnormal district.
In abnormal district; Because increase along with transmitting power P; Receiving signal SIR reduces on the contrary; If therefore still adopt existing inner loop power control method in abnormal district, will cause carrying out the overall interference lifting and finally causing communication quality to improve along with what power was controlled, power control can't be brought into play the main effect that promotes communication quality.
The objective of the invention is inner loop power control is remained on the normality district; Avoid getting into abnormal district; To guarantee under any scene, all can bring into play the main effect of power control, NODEB or UE are transmitted with minimal power; Guarantee the required minimum SIR of communication quality, to reach minimizing of overall interference.
Fig. 2 is the Poewr control method flow chart in the GSM provided by the invention.
As shown in Figure 2, this method comprises:
The present invention can store all previous reception signal SIR, orders reception signal SIR before and the magnitude relationship of sending this TPC order reception signal SIR afterwards through relatively sending the TPC that increases signal transmission power P, confirms said functional relation.
Particularly; When the reception signal SIR after the TPC order of the said transmitting power P of transmission increase orders reception signal SIR before less than the said TPC of transmission; Confirm that said functional relation is said SIR along with the increase of said transmitting power P reduces; Otherwise, confirm that said functional relation is said SIR along with the increase of said transmitting power P increases.
With reference to Fig. 1; When receiving signal SIR and confirm to receive the functional relation between signal SIR and the transmitting power P according to the adjustment process of transmitting power P and the adjustment of all previous transmitting power are corresponding; Can adopt multiple numerical value processing method; The present invention not method of logarithm value processing limits, and for example can adopt following method to confirm said functional relation:
Method one is relatively sent before the TPC order that increases transmitting power P and the magnitude relationship between the up-to-date reception signal SIR afterwards, and only carries out said comparison to a up-to-date TPC order, confirms functional relation according to comparative result.
Method two relatively sends before the TPC order that increases transmitting power P and the magnitude relationship between the up-to-date reception signal SIR afterwards, and all carries out said comparison to up-to-date a plurality of TPC orders, confirms functional relation according to the result who repeatedly compares.
Method three; A plurality of reception signal SIR before the TPC order of sending increase transmitting power P are carried out weighting obtain a SIR; Carry out weighting and obtain the 2nd SIR sending a plurality of reception signal SIR after this TPC order, confirm said functional relation through the magnitude relationship of a SIR and the 2nd SIR relatively.
Carry out numerical value with employing method one below and be treated to example, the present invention is introduced.
The Poewr control method that Fig. 2 of the present invention provides is applicable to inner loop power control.Particularly; In the inner loop power control procedure; Not only will receive signal SIR and the determined SIRtarget of exterior ring power control procedure compares, but also will this reception signal SIR and reception signal SIR before the TPC order that is used to increase transmitting power P be compared, if find increase along with transmitting power P; Current reception signal sir value (promptly increasing transmitting power P reception signal SIR afterwards) is littler than the reception signal SIR before the said TPC order, then stops to increase transmitting power P.
In the Poewr control method provided by the invention, stop to increase transmitting power P concrete grammar can for: keep transmitting power P constant, perhaps confirm again to carry out inner loop power control according to the SIRtarget that confirms again then by target signal interference ratio SIRtarget.Wherein,, keep the integrality of power control flow process, generally confirm target signal interference ratio SIRtarget again through returning the exterior ring power control procedure for compatible with existing Poewr control method.Also can adopt additive method to confirm target signal interference ratio SIRtarget again; For example; The SIR of the reception signal that the last time is measured confirms as new SIRtarget, and the reception signal SIR that perhaps will repeatedly measure recently carries out weighting, and weighted results is confirmed as new SIRtarget.
Above-mentioned Poewr control method provided by the invention can be used for the inner loop power control of up link, also can be used for the inner loop power control of down link.Particularly; The target signal interference ratio SIRtarget that satisfies operation quality requirement that adopts NodeB or UE that uplink downlink signal-to-interference ratio measurement value (SIRest) and exterior ring power control are set compares, and signal interference ratio SIRest (i) is measured in all previous through writing down (each TPC order back); In the increase process of transmitting power P; Relatively increased the magnitude relationship of signal-to-interference ratio measurement value SIRest (i-1) with the SIRest (i) of transmitting power P front and back last time, if (transmitting power P is then continued to increase in i-1 >=0 to SIRest (i)-SIRest; If SIRest (i)-SIRest (i-1)＜0 then stops to increase transmitting power P.
Face the inner loop power control of up link and the inner loop power control of down link down and introduce respectively, specifically see also Fig. 3 and Fig. 4.
Fig. 3 is the inner loop power control method flow chart of up link.
As shown in Figure 3, this method comprises:
Wherein SIRest (i) is i the reception signal sir value that is used for comparing with target signal interference ratio SIRtarget, and wherein i is a natural number.
Whether step 302 judges this SIRest that measures (i) less than target signal interference ratio SIRtarget, if if execution in step 303 not, is sent the TPC order to UE.
Whether step 303 judges this SIRest that measures (i) less than the SIRest that measured last time (i-1), if if execution in step 304 not, is sent the TPC order to UE.
Step 304 finishes inner loop power control, turns to exterior ring power control.
Control for the power first in the flow process shown in Figure 3; In order to guarantee that power control flow shown in Figure 3 can carry out smoothly, the initial value SIRest (0) of SIRest (i) is set to the little value of trying one's best, for example-100dB; So that the sir value of the DPCH channel that base station measurement obtains is certainly greater than initial value SIRest (0); Thereby make that power control first can be according to existing flow performing, if i.e.: SIRest (1)＞SIRtarget, the TPC instruction is " reduction power " so; If SIRest (1)＜SIRtarget, the TPC instruction is " rising power " so, and wherein SIRtarget is adjusted by high level.
For the non-control of power first among Fig. 3, if SIRest (i)＞SIRtarget, the TPC instruction is " reduction power " so; If SIRest (i)＜SIRtarget, and SIRest (i) >=SIRest (i-1), the TPC instruction is " rising power " so; If SIRest (i)＜SIRtarget, and SIRest (i)＜SIRest (i-1) then stop further lifting power, turn to external circule power control, wherein SIRtarget is adjusted by high level.
In the UE side, carry out the soft-decision of TPC bit.Particularly, if judgement is " reduction power ", then UE reduces power control step-size of transmitting power; If instead judgement is " rising power ", power control step-size of the transmitting power that then raises.The power control step-length can be 1dB, 2dB or 3dB, specifically is provided with through special message cell by network layer.
Fig. 4 is the inner loop power control method flow chart of down link.
As shown in Figure 4, this method comprises:
Step 401, UE measures the SIRest (i) that receives signal, stores this SIRest (i).
Wherein SIRest (i) is i the reception signal sir value that is used for comparing with target signal interference ratio SIRtarget, and wherein i is a natural number.
Whether step 402 judges this SIRest that measures (i) less than target signal interference ratio SIRtarget, if if execution in step 403 not, is sent the TPC order to the base station.
Whether step 403 judges this SIRest that measures (i) less than the SIRest that measured last time (i-1), if if execution in step 404 not, is sent the TPC order to the base station.
Step 404 finishes inner loop power control, turns to exterior ring power control.
Visible by Fig. 4, the difference of Fig. 4 and flow process shown in Figure 3 is, the action subject among Fig. 3 is exchanged, and the action of promptly being carried out by the base station is changed to by UE and carries out, and is changed to by the base station by the action of UE execution and carries out.
The method to set up of initial value SIRest (0) among the method to set up of the initial value SIRest (0) of SIRest among Fig. 4 (i) and Fig. 3 is identical, does not give unnecessary details here.
The present invention also provides the device that can carry out Poewr control method according to the invention, specifically sees also Fig. 5.
Fig. 5 is an output control device structure chart provided by the invention.
As shown in Figure 5, this device comprises detection module 501 and control module 502.
Said memory cell is used to store the SIR that receives signal.
Said comparing unit is used for relatively sending the TPC order reception signal SIR afterwards and the magnitude relationship of the reception signal SIR before the said TPC order of transmission that increase said transmitting power P.
Said comparing unit; Can comprise first module; Be used for relatively sending before the TPC order that increases transmitting power P and the magnitude relationship between the up-to-date reception signal SIR afterwards, carry out said comparison, confirm functional relation according to comparative result to up-to-date one or more TPC orders; Perhaps comprise second module; Be used for that a plurality of reception signal SIR before the TPC order of sending increase transmitting power P are carried out weighting and obtain a SIR; Carry out weighting and obtain the 2nd SIR sending a plurality of reception signal SIR after this TPC order, confirm said functional relation through the magnitude relationship of a SIR and the 2nd SIR relatively.
Said comparing unit further comprises three module, is used for relatively receiving the SIR of signal and the magnitude relationship between the SIRtarget.
It is thus clear that; Poewr control method provided by the invention and device; Can carry out the communicating requirement that satisfies link-quality with the transmitting power of minimum well, make power control be in normal condition, avoid the power control vicious circle process that causes the lifting of network overall interference out of control.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (18)
1. the Poewr control method in the GSM is characterized in that this method comprises:
Functional relation between the signal interference ratio (SIR) that detect to receive signal and the transmitting power P that launches this signal when to be said SIR along with the increase of said transmitting power P reduce, stops to increase said transmitting power P in said functional relation.
2. method according to claim 1 is characterized in that, the functional relation between the SIR of said detection reception signal and the transmitting power P of this signal of emission comprises:
Storage receives the SIR of signal; Reception signal SIR after power control (TPC) order that send to increase said transmitting power P judges that said functional relation is said SIR along with the increase of said transmitting power P reduces when sending before reception signal SIR of said TPC order.
3. method according to claim 2 is characterized in that, this method comprises:
Relatively receive the SIR and the target signal interference ratio (SIRtarget) of signal, if the SIR that receives signal then when said SIR reduces along with the increase of said transmitting power P, stops to increase said transmitting power P less than said SIRtarget.
4. method according to claim 3 is characterized in that, this method also comprises:
If the SIR that receives signal is less than said SIRtarget, and the TPC order reception signal SIR afterwards that sends the said transmitting power P of increase then increases said transmitting power P greater than sending said TPC order reception signal SIR before.
5. method according to claim 3 is characterized in that, this method also comprises:
If said SIR greater than said SIRtarget, then reduces said transmitting power P.
6. according to the described method of the arbitrary claim of claim 1 to 5, it is characterized in that the functional relation between the signal interference ratio (SIR) of said detection reception signal and the transmitting power P of this signal of emission comprises:
Relatively send before the TPC order that increases transmitting power P and the magnitude relationship between the up-to-date reception signal SIR afterwards, carry out said comparison, confirm functional relation according to comparative result to up-to-date one or more TPC orders;
Perhaps; A plurality of reception signal SIR before the TPC order of sending increase transmitting power P are carried out weighting obtain a SIR; Carry out weighting and obtain the 2nd SIR sending a plurality of reception signal SIR after this TPC order, confirm said functional relation through the magnitude relationship of a SIR and the 2nd SIR relatively.
7. method according to claim 3 is characterized in that, saidly stops to increase said transmitting power P and comprises:
Keep said transmitting power P constant.
8. method according to claim 3 is characterized in that, saidly stops to increase said transmitting power P and comprises:
Again confirm SIRtarget, carry out power control according to the SIRtarget that confirms again.
9. method according to claim 8 is characterized in that, said definite again SIRtarget comprises:
Return the exterior ring power control procedure and confirm SIRtarget;
The SIR of the reception signal that perhaps, the last time is measured confirms as new SIRtarget;
The reception signal SIR that perhaps will repeatedly measure recently carries out weighting, and weighted results is confirmed as new SIRtarget.
10. method according to claim 1 and 2 is characterized in that,
Functional relation between the SIR that subscriber equipment (UE) detect to receive signal and the transmitting power P that launches this signal, when to be said SIR along with the increase of said transmitting power P reduced, the base station stopped to increase transmitting power P in said functional relation.
11. method according to claim 1 and 2 is characterized in that,
Functional relation between the SIR that the base station detect to receive signal and the transmitting power P that launches this signal, when to be said SIR along with the increase of said transmitting power P reduced, UE stopped to increase transmitting power P in said functional relation.
12. the output control device in the GSM is characterized in that this device comprises detection module and control module;
Said detection module is used to detect the functional relation between SIR that receives signal and the transmitting power P that launches this signal;
Said control module is used for when to be said SIR along with the increase of said transmitting power P reduce, stopping to increase said transmitting power P in said functional relation.
13. device according to claim 12 is characterized in that, said detection module comprises memory cell and comparing unit;
Said memory cell is used to store the SIR that receives signal;
Said comparing unit is used for relatively sending the TPC order reception signal SIR afterwards and the magnitude relationship of the reception signal SIR before the said TPC order of transmission that increase said transmitting power P;
Said control module is used for reception signal SIR after the TPC order that send to increase said transmitting power P when sending before reception signal SIR of said TPC order, stops to increase said transmitting power P.
14. device according to claim 13 is characterized in that,
Said comparing unit; Comprise first module; Be used for relatively sending before the TPC order that increases transmitting power P and the magnitude relationship between the up-to-date reception signal SIR afterwards, carry out said comparison, confirm functional relation according to comparative result to up-to-date one or more TPC orders; Perhaps comprise second module; Be used for that a plurality of reception signal SIR before the TPC order of sending increase transmitting power P are carried out weighting and obtain a SIR; Carry out weighting and obtain the 2nd SIR sending a plurality of reception signal SIR after this TPC order, confirm said functional relation through the magnitude relationship of a SIR and the 2nd SIR relatively.
15. device according to claim 13 is characterized in that,
Said comparing unit further comprises three module, is used for relatively receiving the SIR of signal and the magnitude relationship between the SIRtarget;
Said control module; Be used at the SIR that receives signal less than said SIRtarget; And when the reception signal SIR after the TPC order of the said transmitting power P of transmission increase orders reception signal SIR before less than the said TPC of transmission, stop to increase said transmitting power P.
16. according to claim 12 or 13 or 14 or 15 described devices, it is characterized in that,
Said control module comprises being used to the module that keeps said transmitting power P constant.
17. according to claim 12 or 13 or 14 or 15 described devices, it is characterized in that,
Said control module comprises a module, is used for confirming again SIRtarget, and another module, is used for carrying out power control according to the SIRtarget that confirms again.
18. device according to claim 17 is characterized in that,
Said control module comprises a module, is used to return the exterior ring power control procedure, confirms SIRtarget again according to block error rate BLER; Perhaps comprise another module, the SIR of the reception signal that is used for the last time is measured confirms as new SIRtarget, and the reception signal SIR that perhaps will repeatedly measure recently carries out weighting, and weighted results is confirmed as new SIRtarget.
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