CN102547949B - 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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- CN102547949B CN102547949B CN201010618302.7A CN201010618302A CN102547949B CN 102547949 B CN102547949 B CN 102547949B CN 201010618302 A CN201010618302 A CN 201010618302A CN 102547949 B CN102547949 B CN 102547949B
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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, particularly relate to the Poewr control method in a kind of mobile communication system and device.
Background technology
The target of carrying out power control is in mobile communication system: under the condition ensureing user communication quality, make the transmitting power of subscriber equipment (UE) and base station (NodeB) as far as possible little.For this reason, the transmitting power of each UE must be enable as far as possible to meet the minimum signal to noise ratio reaching when arriving NodeB and ensure needed for communication quality that transmits of UE, and ensure and channel variation far and near regardless of NodeB, identical received power can be obtained at NodeB end, namely offset " near-far interference ".
Current Poewr control method is generally on the basis assessed Received signal strength energy or the demodulation signal to noise ratio index of receiver end, the decline introduced in timely compensation wireless channel.Controlled by power, high-quality communication can either be maintained, interference is not produced to other user in same Radio Resource again, ensure that power system capacity; , controlled by power meanwhile, the power consumption of UE can be reduced, thus extend the stand-by time of UE.
Below for TD-SCDMA system, existing Poewr control method is described in detail.
TD-SCDMA system is an interference limiting system, and interference is the one of the main reasons causing TD-SCDMA system hydraulic performance decline.With other cdma systems unlike: the interference of TD-SCDMA is mainly from the interference of co-frequency neighbor cell.In TD-SCDMA system, there are nonideal correlation properties between the spreading code that each user uses, " near-far interference " problem is outstanding especially.Therefore, power controls the total capacity that will directly have influence on TD-SCDMA system.
In TD-SCDMA system, the way using open Loop Power control and close-loop power control to combine controls to realize power.Wherein, the object of closed-loop power control is the transmitting power adjusting each UE, reduces the impact of near-far interference, ensures that NodeB receives the power of all UE as far as possible all equal, thus makes each user can meet the service quality (Qos) of transport service.
Close-loop power control is used for RRC connection mode, can be divided into again two control rings.Control ring between RNC and NodeB is called open sea wharf, and the control ring between NodeB and UE is called inner-loop power control, is introduced respectively below:
1, open sea wharf:
Along with the change of mobile communication environment and the change of translational speed, signal interference ratio (the Signal to Interference Ratio that the service needed transmitted meets, SIR) also to change, under different multi-path environments, sir target value (the Signal to Interference Ratio target needed, SIRtarget) be also change, therefore need to determine SIRtarget by open sea wharf.And up SIRtarget is specified by network side, the SIRtarget value that likely network side is initially specified differs more with the signal interference ratio of current business actual needs, all needs to be adjusted SIRtarget by open sea wharf in these situations.
The basic ideas of outer-loop power controlling method are: the SIRtarget adjusting inner-loop power control according to the quality of communication, enables system meet the requirement of communication quality all the time with minimum power.Wherein, the quality of communication generally uses the Block Error Rate of Received signal strength (BLER) to weigh.
Particularly, in outer-loop power controlling method, detect the BLER of transmission channel (DPCH), according to the target Block Error Rate preset (BLERtarget), according to following rule, adjust SIRtarget, make the BLER obtained approach the BLERtarget preset:
If actual measurement BLER > is BLERtarget, then adjust upward SIRtarget.
If actual measurement BLER < is BLERtarget, then adjust SIRtarget downwards.
Open sea wharf module receives the quality evaluation of transmission channel as input, to the up inner-loop power control target setting value SIRtarget being positioned at NodeB, controls for wireless channel long term quality.
During specific implementation, the layer 2 of RNC utilizes the BLERtarget of setting, the BLER actual value by calculating, and calculates SIRtarget, SIRtarget is issued NodeB and does inner-loop power control.
2, inner-loop power control:
The method of inner-loop power control is given: for up link in 3GPP TS 25.214, first NodeB carries out sir measurement to the every wireless links received and obtains measured value SIRest, then compare with the SIRtarget met needed for business, if SIRest is >=SIRtarget, then NodeB sends to UE the transmitting power being used to indicate this UE reduction transmitting power at descending control channel and controls (Transmitted Power Control, TPC) order; If SIRest < is SIRtarget, then NodeB sends the TPC command being used to indicate UE increase transmitting power to UE at descending control channel; Then UE judges it is increase transmitting power or reduce transmitting power according to the power control algorithms that the TPC command received and network layer are specified.
The basic ideas of inner loop power control method: according to SIRest and SIRtarget comparative result, the transmitting power of adjustment UE, thus realize the 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 current TPC command is: if SIRest > is SIRtarget, and the TPC command so transmitted is " 00 "; If SIRest is <=SIRtarget, the TPC command so transmitted is " 11 ".
Inner-loop power control sets the power of up dedicated channel or shared physical channel.In 1.28McpsTDD, this is a closed loop procedure.
Inner-loop power control can be divided into uplink closed loop and downlink closed-loop power to control.
Uplink closed loop process comprises: NodeB receives the SIRtarget controlled from ascending exterior ring power, and the SIRest of up proprietary or shared channel, determine TPC command according to SIRest and SIRtarget, this TPC command is mail to UE by descending proprietary or shared physical channel.
Downlink closed-loop power controls identical with up inner-loop power control principle.UE is according to the comparative result of the coefficient correlations such as channel measurement amount and demodulation threshold, and determine TPC command, then TPC command is issued NodeB by UE.
From such scheme, there is a comparatively serious problem in existing Poewr control method, namely disturbs vicious circle.
For real system, in some scenarios, such as MPS process edge or minizone overlapping covered under, there is inter-user interference, and then by due to vying each other and the situation of emergent power lifting between user, even if but now UE increases 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 cannot reach business demand, so there will be NODEB or UE to improve constantly transmitting power, until NODEB or UE carries out the situation of launching with maximum power.
Such as, UE1 improves constantly its uplink transmission power, to resist the interference of UE2 to UE1, meanwhile, UE2 also improves constantly its uplink transmission power, to resist the interference of UE1 to UE2, circulation like this, final UE1 and UE2 all launches with full power, and the interference between UE1 and UE2 is very large, but the quality of service of UE1 and UE2 still cannot ensure.
At present, in some plant equipment, adopt power threshold parameter arrange suppress above-mentioned interference vicious circle, such as:
The downlink power control algorithm of certain equipment manufacturer, adopts " maximum permission down transmitting power " optimum configurations, can not exceed this thresholding, preventing under similar above-mentioned environment, the continuous lifting of descending power for limiting down transmitting power.
Uplink power control algorithm in HSUPA system, arranges a noise and raises (RoT) thresholding, for limiting the received power upper limit that base station side allows, is to control under above-mentioned like environment equally, the continuous lifting of ascending power.
For up DPCH dedicated channel, similar " up maximum permission received power " thresholding is set, can effectively improve uplink interference larger time, the further deterioration of wireless environment.
No matter adopt above-mentioned that parameter method for limiting, due to parameter once setting, all can not use in the process of business user and change, therefore all cannot adapt to different scene, all can cause the vicious circle disturbing increase and network quality to decline in some scenarios.
Summary of the invention
In view of this, the invention provides the Poewr control method in a kind of mobile communication system and device, to avoid because between UE, continuous lifting power causes disturbing vicious circle in order to the interference resisted each other.
Technical scheme of the present invention is specifically achieved in that
A Poewr control method in mobile communication system, the method comprises:
Detect the functional relation between the signal interference ratio (SIR) of Received signal strength and the transmitting power P launching this signal, when to be described SIR reduce along with the increase of described transmitting power P described functional relation, stop increasing described transmitting power P.
An output control device in mobile communication system, this device comprises detection module and control module;
Described detection module, for detecting the functional relation between the SIR of Received signal strength and the transmitting power P launching this signal;
Described control module, for be described SIR in described functional relation along with the increase of described transmitting power P reduce time, stop increasing described transmitting power P.
As seen from the above technical solution, the present invention is when carrying out power and controlling, first the functional relation between the SIR of Received signal strength and the transmitting power P launching this signal is detected, when described SIR reduces along with the increase of described transmitting power P, stop increasing described transmitting power P, and the functional relation do not distinguished in prior art between the SIR of Received signal strength and transmitting power P, but the scheme increasing transmitting power P when the SIR of Received signal strength does not reach SIRtarget is simply compared, the interference vicious circle because continuous lifting power causes in order to the interference resisted each other between UE can be avoided.
Accompanying drawing explanation
Fig. 1 is the graph of relation of uplink downlink SIR under different scene and transmitting power P.
Fig. 2 is the Poewr control method flow chart in mobile communication system 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 output control device structure chart provided by the invention.
Embodiment
Under different scenes, such as, when communication environment or communications status are different, the SIR of radio link quality and the relation of transmitting power P change according to scene.Usually can be divided three classes scene, and scene one is that uplink downlink quality is fine, and scene two is that uplink downlink quality is general, and scene three is uplink downlink poor quality.For under every class scene, the relation of uplink downlink SIR and transmitted power P as shown in Figure 1.
Fig. 1 is the graph of relation of uplink downlink SIR under different scene and transmitting power P.
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 increases to certain value subsequently, along with the increase of transmitting power P, SIR reduces on the contrary.Such as, in the overlapping serious and region that interference is larger in MPS process edge or minizone, all there is the increase along with transmitting power P, the phenomenon that Received signal strength SIR reduces on the contrary.
So power can be controlled to be divided into normality district and abnormal district for scene three, wherein, the region that SIR increases along with the increase of transmitting power P is normality district, otherwise the region that SIR reduces along with the increase of transmitting power P is called abnormal district.
In abnormal district, due to the increase along with transmitting power P, Received signal strength SIR reduces on the contrary, if therefore still adopt existing inner loop power control method in abnormal district, finally cause communication quality to improve by causing along with the carrying out overall interference lifting of power control, power controls to play the Main Function promoting communication quality.
Inner-loop power control is the object of the invention is to remain on normality district, avoid entering abnormal district, to guarantee under any scene, the equal Main Function that can play power and control, make NODEB or UE with minimum power transmission signal, ensure the minimum SIR needed for communication quality, to reach minimizing of overall interference.
Fig. 2 is the Poewr control method flow chart in mobile communication system provided by the invention.
As shown in Figure 2, the method comprises:
Step 201, detects the functional relation between the SIR of Received signal strength and the transmitting power P launching this signal.
Step 202, when to be described SIR reduce along with the increase of described transmitting power P described functional relation, stops increasing described transmitting power P.
The present invention can store all previous Received signal strength SIR, by comparing the Received signal strength SIR sent before the TPC command increasing signal transmission power P and the magnitude relationship sending the Received signal strength SIR after this TPC command, determines described functional relation.
Particularly, when sending the Received signal strength SIR after the TPC command increasing described transmitting power P and being less than the Received signal strength SIR sent before described TPC command, determine that described functional relation is described SIR along with the increase of described transmitting power P reduces, otherwise, determine that described functional relation is described SIR along with the increase of described transmitting power P increases.
With reference to Fig. 1, according to the adjustment process of transmitting power P and all previous transmitting power adjust corresponding Received signal strength SIR determine the functional relation between Received signal strength SIR and transmitting power P time, multiple Numerical Methods can be adopted, the method of the present invention's not logarithm value process limits, such as, can adopt and determine described functional relation with the following method:
Method one, compares the magnitude relationship between the up-to-date Received signal strength SIR before and after the TPC command sending increase transmitting power P, and only carries out described comparison, according to comparative result determination functional relation for up-to-date TPC command.
Method two, compares the magnitude relationship between the up-to-date Received signal strength SIR before and after the TPC command sending increase transmitting power P, and all carries out described comparison for up-to-date multiple TPC command, according to the result determination functional relation repeatedly compared.
Method three, the multiple Received signal strength SIR sent before the TPC command increasing transmitting power P are weighted and obtain a SIR, the multiple Received signal strength SIR sent after this TPC command are weighted and obtain the 2nd SIR, determine described functional relation by the magnitude relationship comparing a SIR and the 2nd SIR.
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 inner loop p wer control process, not only Received signal strength SIR and the determined SIRtarget of outer loop power control process is compared, but also will by this Received signal strength SIR be used for the Received signal strength SIR increased before the TPC command of transmitting power P and compare, if find the increase along with transmitting power P, current Received Signal sir value (namely increasing the Received signal strength SIR after transmitting power P) is less than the Received signal strength SIR before described TPC command, then stop increasing transmitting power P.
In Poewr control method provided by the invention, the concrete grammar that stopping increases transmitting power P can be: keep transmitting power P constant, or redefine target signal interference ratio SIRtarget, then carry out inner-loop power control according to the SIRtarget redefined.Wherein, in order to compatible with existing Poewr control method, keep the integrality of power control flow process, generally redefining target signal interference ratio SIRtarget by returning outer loop power control process.Also additive method can be adopted to redefine target signal interference ratio SIRtarget, such as, the SIR of Received signal strength the last time measurement obtained is defined as new SIRtarget, or the Received signal strength SIR obtained by nearest repetitive measurement is weighted, and weighted results is defined as new SIRtarget.
Above-mentioned Poewr control method provided by the invention may be used for the inner-loop power control of up link, also may be used for the inner-loop power control of down link.Particularly, NodeB or UE is adopted to compare the target signal interference ratio SIRtarget meeting operation quality requirement of uplink downlink signal-to-interference ratio measurement value (SIRest) with outer loop power control sets, and, signal interference ratio SIRest (i) is measured by recording all previous (after each TPC command), in the increase process of transmitting power P, relatively increased the magnitude relationship of the signal-to-interference ratio measurement value SIRest (i-1) before and after transmitting power P and SIRest (i) last time, if SIRest (i)-SIRest (i-1 >=0, then continue to increase transmitting power P, if SIRest (i)-SIRest (i-1) < 0, then stop increasing transmitting power P.
Below the inner-loop power control of up link and the inner-loop power control of down link are introduced respectively, specifically referred to Fig. 3 and Fig. 4.
Fig. 3 is the inner loop power control method flow chart of up link.
As shown in Figure 3, the method comprises:
Step 301, the SIRest (i) of base station measurement Received signal strength, stores this SIRest (i).
Wherein SIRest (i) is i-th Received signal strength sir value for comparing with target signal interference ratio SIRtarget, and wherein i is natural number.
Step 302, judges that this is measured the SIRest (i) obtained and whether is less than target signal interference ratio SIRtarget, if so, performs step 303, if not, send TPC command to UE.
Step 303, judges that this is measured the SIRest (i) obtained and whether is less than the SIRest (i-1) that last time, measurement obtained, if so, performs step 304, if not, send TPC command to UE.
Step 304, terminates inner-loop power control, turns to open sea wharf.
Power first in flow process shown in Fig. 3 is controlled, in order to ensure that the power control procedures shown in Fig. 3 can carry out smoothly, the initial value SIRest (0) of SIRest (i) is set to a little value of trying one's best, such as-100dB, the sir value of the DPCH channel obtained to make base station measurement is greater than initial value SIRest (0) certainly, thus make first power control can according to existing flow performing, that is: if SIRest (1) > SIRtarget, so TPC instruction is " reduction power "; If SIRest (1) < SIRtarget, so TPC instruction is " increased wattage ", and wherein SIRtarget is adjusted by high level.
Control for the non-power first in Fig. 3, if SIRest (i) > is SIRtarget, so TPC instruction is " reduction power "; If SIRest (i) < is SIRtarget, and SIRest (i) >=SIRest (i-1), so TPC instruction is " increased wattage "; If SIRest (i) < is 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 UE side, perform the soft-decision of TPC bit.Particularly, if judgement is " reduction power ", then UE reduces transmitting power power control step-size; If instead judgement is " increased wattage ", then raise transmitting power power control step-size.Power control step-length can be 1dB, 2dB or 3dB, is specifically arranged by 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, the method comprises:
Step 401, UE measures the SIRest (i) of Received signal strength, stores this SIRest (i).
Wherein SIRest (i) is i-th Received signal strength sir value for comparing with target signal interference ratio SIRtarget, and wherein i is natural number.
Step 402, judges that this is measured the SIRest (i) obtained and whether is less than target signal interference ratio SIRtarget, if so, performs step 403, if not, send TPC command to base station.
Step 403, judges that this is measured the SIRest (i) obtained and whether is less than the SIRest (i-1) that last time, measurement obtained, if so, performs step 404, if not, send TPC command to base station.
Step 404, terminates inner-loop power control, turns to open sea wharf.
As seen from Figure 4, the difference of flow process shown in Fig. 4 and Fig. 3 is, is exchanged by the action subject in Fig. 3, and the action namely performed by base station is changed to and is performed by UE, and the action performed by UE is changed to and is performed by base station.
In Fig. 4, the method to set up of the initial value SIRest (0) of SIRest (i) is identical with the method to set up of the initial value SIRest (0) in Fig. 3, does not repeat herein.
Present invention also offers the device that can perform Poewr control method of the present invention, specifically refer to Fig. 5.
Fig. 5 is output control device structure chart provided by the invention.
As shown in Figure 5, this device comprises detection module 501 and control module 502.
Detection module 501, for detecting the functional relation between the SIR of Received signal strength and the transmitting power P launching this signal.
Control module 502, for be described SIR in described functional relation along with the increase of described transmitting power P reduce time, stop increasing described transmitting power P.
Detection module 501 can comprise memory cell and comparing unit.
Described memory cell, for storing the SIR of Received signal strength.
Described comparing unit, for comparing the Received signal strength SIR sent after the TPC command increasing described transmitting power P and the magnitude relationship sending the Received signal strength SIR before described TPC command.
Described comparing unit, the first module can be comprised, for compare send increase transmitting power P TPC command before and after up-to-date Received signal strength SIR between magnitude relationship, carry out described comparison for up-to-date one or more TPC command, according to comparative result determination functional relation; Or comprise the second module, a SIR is obtained for being weighted the multiple Received signal strength SIR sent before the TPC command increasing transmitting power P, the multiple Received signal strength SIR sent after this TPC command are weighted and obtain the 2nd SIR, determine described functional relation by the magnitude relationship comparing a SIR and the 2nd SIR.
Control module 502, for when sending the Received signal strength SIR after the TPC command increasing described transmitting power P and being less than the Received signal strength SIR sent before described TPC command, stops increasing described transmitting power P.
Described comparing unit, comprises the 3rd module further, for compare Received signal strength SIR and SIRtarget between magnitude relationship.
Control module 502, for being less than described SIRtarget at the SIR of Received signal strength, and the Received signal strength SIR sent after the TPC command increasing described transmitting power P is when being less than the Received signal strength SIR sent before described TPC command, stop increasing described transmitting power P.
Control module 502, comprises for keeping the module that described transmitting power P is constant.
Control module 502, comprises a module, for redefining SIRtarget, and another module, for carrying out power control according to the SIRtarget redefined.
Control module 502, can comprise a module, redefines SIRtarget for returning outer loop power control process according to block error rate BLER; Or comprise another module, the SIR for Received signal strength the last time measurement obtained is defined as new SIRtarget, or the Received signal strength SIR obtained by nearest repetitive measurement is weighted, and weighted results is defined as new SIRtarget.
Visible, Poewr control method provided by the invention and device, the communicating requirement meeting link-quality with minimum transmitting power can be performed well, make power control to be in normal condition, avoid power to control the vicious circle process causing overall network to disturb lifting out of control.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (12)
1. the Poewr control method in mobile communication system, is characterized in that, the method comprises:
Detect the functional relation between the signal interference ratio SIR of Received signal strength and the transmitting power P launching this signal, when to be described SIR reduce along with the increase of described transmitting power P described functional relation, stop increasing described transmitting power P;
Functional relation between the SIR of described detection Received signal strength and the transmitting power P launching this signal comprises:
Store the SIR of Received signal strength, when sending the power Received signal strength SIR controlled after TPC command increasing described transmitting power P and being less than the Received signal strength SIR sent before described TPC command, judge that described functional relation reduces along with the increase of described transmitting power P as described SIR;
Compare SIR and the target signal interference ratio SIRtarget of Received signal strength, if the SIR of Received signal strength is less than described SIRtarget, then when described SIR reduces along with the increase of described transmitting power P, stop increasing described transmitting power P;
If the SIR of Received signal strength is less than described SIRtarget, and the Received signal strength SIR sent after the TPC command increasing described transmitting power P is greater than the Received signal strength SIR sent before described TPC command, then increase described transmitting power P.
2. method according to claim 1, is characterized in that, the method also comprises:
If described SIR is greater than described SIRtarget, then reduce described transmitting power P.
3. the method according to the arbitrary claim of claim 1 to 2, is characterized in that, the functional relation between the signal interference ratio SIR of described detection Received signal strength and the transmitting power P launching this signal comprises:
Relatively send the magnitude relationship between the up-to-date Received signal strength SIR before and after the TPC command increasing transmitting power P, carry out described comparison for up-to-date one or more TPC command, according to comparative result determination functional relation;
Or, the multiple Received signal strength SIR sent before the TPC command increasing transmitting power P are weighted and obtain a SIR, the multiple Received signal strength SIR sent after this TPC command are weighted and obtain the 2nd SIR, determine described functional relation by the magnitude relationship comparing a SIR and the 2nd SIR.
4. method according to claim 1, is characterized in that, described stopping increases described transmitting power P and comprises:
Keep described transmitting power P constant.
5. method according to claim 1, is characterized in that, described stopping increases described transmitting power P and comprises:
Redefine SIRtarget, carry out power control according to the SIRtarget redefined.
6. method according to claim 5, is characterized in that, described in redefine SIRtarget and comprise:
Return outer loop power control process and determine SIRtarget;
Or the SIR of Received signal strength the last time measurement obtained is defined as new SIRtarget;
Or the Received signal strength SIR obtained by nearest repetitive measurement is weighted, and weighted results is defined as new SIRtarget.
7. method according to claim 1, is characterized in that,
User equipment (UE) detects the functional relation between the SIR of Received signal strength and the transmitting power P launching this signal, and when to be described SIR reduce along with the increase of described transmitting power P described functional relation, base station stops increasing transmitting power P.
8. method according to claim 1, is characterized in that,
The functional relation between the SIR of Received signal strength and the transmitting power P launching this signal is detected in base station, and when to be described SIR reduce along with the increase of described transmitting power P described functional relation, UE stops increasing transmitting power P.
9. the output control device in mobile communication system, is characterized in that, this device comprises detection module and control module;
Described detection module, for detecting the functional relation between the SIR of Received signal strength and the transmitting power P launching this signal;
Described control module, for be described SIR in described functional relation along with the increase of described transmitting power P reduce time, stop increasing described transmitting power P;
Described detection module comprises memory cell and comparing unit;
Described memory cell, for storing the SIR of Received signal strength;
Described comparing unit, for comparing the Received signal strength SIR sent after the TPC command increasing described transmitting power P and the magnitude relationship sending the Received signal strength SIR before described TPC command;
Described control module, for when sending the Received signal strength SIR after the TPC command increasing described transmitting power P and being less than the Received signal strength SIR sent before described TPC command, stops increasing described transmitting power P;
Described comparing unit, comprise the first module, for compare send increase transmitting power P TPC command before and after up-to-date Received signal strength SIR between magnitude relationship, carry out described comparison for up-to-date one or more TPC command, according to comparative result determination functional relation; Or comprise the second module, a SIR is obtained for being weighted the multiple Received signal strength SIR sent before the TPC command increasing transmitting power P, the multiple Received signal strength SIR sent after this TPC command are weighted and obtain the 2nd SIR, determine described functional relation by the magnitude relationship comparing a SIR and the 2nd SIR;
Described comparing unit, comprises the 3rd module further, for compare Received signal strength SIR and SIRtarget between magnitude relationship;
Described control module, for being less than described SIRtarget at the SIR of Received signal strength, and the Received signal strength SIR sent after the TPC command increasing described transmitting power P is when being less than the Received signal strength SIR sent before described TPC command, stop increasing described transmitting power P.
10. device according to claim 9, is characterized in that,
Described control module, comprises for keeping the module that described transmitting power P is constant.
11. devices according to claim 9, is characterized in that,
Described control module, comprises a module, for redefining SIRtarget, and another module, for carrying out power control according to the SIRtarget redefined.
12. devices according to claim 11, is characterized in that,
Described control module, comprises a module, for returning outer loop power control process, redefines SIRtarget according to block error rate BLER; Or comprise another module, the SIR for Received signal strength the last time measurement obtained is defined as new SIRtarget, or the Received signal strength SIR obtained by nearest repetitive measurement is weighted, and weighted results is defined as new SIRtarget.
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| EP2016686B1 (en) * | 2006-04-21 | 2009-10-21 | Telefonaktiebolaget L M Ericsson (PUBL) | Iterative decoding with intentional snr/sir reduction |
| CN101604989A (en) * | 2008-06-12 | 2009-12-16 | 北京信威通信技术股份有限公司 | Adjust the method and the device of through-put power in a kind of wireless communication system |
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| CN101068120B (en) * | 2006-11-23 | 2011-08-10 | 中兴通讯股份有限公司 | Maximum transmission power testing device and method |
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| JP2003158487A (en) * | 2001-11-21 | 2003-05-30 | Nec Corp | Radio base station, mobile station, radio receiver, sir estimation method, transmission power control method and program |
| CN101027857A (en) * | 2004-09-29 | 2007-08-29 | 富士通株式会社 | Transmission power control unit and transmission power control method |
| CN101026399A (en) * | 2006-02-21 | 2007-08-29 | 富士通株式会社 | Power control apparatus for wireless telecommunication system |
| EP2016686B1 (en) * | 2006-04-21 | 2009-10-21 | Telefonaktiebolaget L M Ericsson (PUBL) | Iterative decoding with intentional snr/sir reduction |
| CN101604989A (en) * | 2008-06-12 | 2009-12-16 | 北京信威通信技术股份有限公司 | Adjust the method and the device of through-put power in a kind of wireless communication system |
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