CN100353681C - Inner ring power frequency control method - Google Patents
Inner ring power frequency control method Download PDFInfo
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- CN100353681C CN100353681C CNB2004100561267A CN200410056126A CN100353681C CN 100353681 C CN100353681 C CN 100353681C CN B2004100561267 A CNB2004100561267 A CN B2004100561267A CN 200410056126 A CN200410056126 A CN 200410056126A CN 100353681 C CN100353681 C CN 100353681C
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Abstract
The present invention relates to an inner loop power control technology in a third generation of mobile communication system, which provides a method for adjusting the frequency of the rapid inner loop power control by using the estimated moving speed of a mobile station. The method comprises the steps that mobile stations at different speeds are matched with different levels of inner loop power control frequencies and inner loop power control frequency signaling; a base station estimates the speed of the mobile station in real time so as to select a matched frequency, and informs an RNC/BSC and a UE of a selected result through the inner loop power control frequency signaling; the base station, the RNC/BSC and the UE carry out the inner loop power control of a system according to the inner loop power control frequency which is selected by the base station. When the modification of a protocol is not related, a second method is adopted. During the baseband processing of the base station, the distribution period of a power control command and a downlink power control period are set so as to achieve the purpose of adjusting the power control frequency; or only one parameter signaling of a power control algorithm is added between the base station and RNC, and a proper control method is selected after the power control parameter is known by the base station.
Description
Technical field
The present invention relates to 3-G (Generation Three mobile communication system), particularly the inner loop power control technology provides the speed of utilizing travelling carriage to adjust the method for inner loop power FREQUENCY CONTROL.
Background technology
In 3-G (Generation Three mobile communication system), comprise three kinds of power control technology: open loop power control, inner-loop power control and external circule power control, wherein inner-loop power control is the crucial power control technology of decision systems performance.Inner-loop power control only adopts power control at a slow speed in second generation mobile communication system, and inner-loop power control is to adopt rapid power control in 3-G (Generation Three mobile communication system).As in WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) system, inner-loop power control is that the employing frequency is the rapid power control of 1.5khz.Rapid power control not only can resemble in the second generation mobile communication system compensating for path decline and shade the power control at a slow speed, also can remedy rapid fading, improves systematic function, and this power control technology at a slow speed cannot be accomplished.
But in some wireless channel environment, particularly in the wireless channel environment, inner-loop power control can not improve the performance of system to the travelling carriage translational speed fast, can cause the decline of systematic function on the contrary faster.As at 3GPP TS25.104 (3GPP, 3rd Generation Partnership Project) the case4 channel in the agreement, the WCDMA system adopts quick inner-loop power control technology to bring the above performance loss of 0.5dB at least, so close the improvement greatly that quick inner-loop power control can bring performance this moment.Equally under the very slow almost static wireless channel of translational speed, the inner-loop power control decline that brings systematic function equally fast.Power control gain when as shown in Figure 1, different translational speed lower inner ring power control fixed-frequency are 1.5khz under the different translational speeds.
Optimum power control frequency curve under the different translational speeds as shown in Figure 2, under certain power control frequency, the power control gain changes along with the variation of translational speed, shows as a parabola, the power control gain reaches maximum under certain speed.Equally, under the different translational speeds, exist the power control frequency of an optimum, this moment, the power control gain was maximum.
Fig. 1 and Fig. 2 have schematically shown the relation between different translational speeds and inner-loop power control gain and the best inner-loop power control frequency, do not represent definite numerical relation.But the description of front as can be seen, and the environment of wireless channel is travelling carriage translational speed and have fast the matching relationship an of the best between the inner-loop power control frequency just, can close inner-loop power control during high speed even.
Owing to replace inner-loop power control at a slow speed with quick inner-loop power control in the system, inner-loop power control also will play the effect that remedies path fading and shade fast, so inner-loop power control also must exist, can not close.But if the frequency shift of quick inner-loop power control can be made it to adapt with the travelling carriage translational speed, just can bring the improvement of systematic function, thereby improve power system capacity.
This paper has proposed a kind of method of controlling quick inner-loop power control frequency according to the travelling carriage translational speed of estimating on the basis of the present quick inner-loop power control technology of 3-G (Generation Three mobile communication system).This method can be according to the frequency of the quick inner-loop power control of the adaptive adjustment of wireless channel environment, thereby improves systematic function, increases power system capacity.
In existing 3-G (Generation Three mobile communication system), just adopted the method for adjusting quick inner-loop power control frequency according to different wireless channel environments.Be example with the WCDMA system below, introduce and how to adopt this technology to improve the power control performance.In the WCDMA system, inner-loop power control mainly is that DPCH (Dedicated Physical Channel, DPCH) channel is carried out fast, in 3GPP TS25.214 agreement, has stipulated different power control technology.Introduce respectively below up DPCH channel is how to adjust the frequency of quick inner-loop power control according to different wireless channel environments with descending DPCH channel in the 3GPP agreement, thereby reach the purpose of improving systematic function.
In up DPCH channel, the inner-loop power control frequency be each time slot once, 1.5khz just.But two kinds of power control algorithms (Power Control Algorithm:PCA) are arranged in up DPCH channel, be respectively power control algorithm 1 and power control algorithm 2.Different power control algorithms to NodeB without any influence, NodeB does not also know the power control algorithm, all be at the SIR of each time slot estimating received signal (Signal-to-Interference Ratio, signal interference ratio), compare with target SIR then, produce power per liter or fall the power control commands of power.But at UE (User Equipment, subscriber equipment) end, the method for different power control algorithm adjustment transmitting powers is then different.If power control algorithm 1 then is that each time slot carries out a power adjustment, carry out according to the power control commands that each time slot receives, so the power control frequency is 1.5k.If power control algorithm 2, then per 5 time slots just may be adjusted transmitting power one time, if five time slots all require just power per liter of power per liter, power just falls in power if five time slots all will be begged to surrender, otherwise transmitting power remains unchanged.By this method, reduced the frequency of inner-loop power control.
In descending DPCH channel, the inner-loop power control frequency be equally each time slot once, 1.5khz just.Two kinds of power control patterns (DPC MODE) are also arranged in descending DPCH channel equally, be respectively power control pattern 0 and power control pattern 1.At the UE end, must carry out according to the agreement of 3GPP, if power control pattern 0, then each time slot is launched different power control commands, if power control pattern 1, the power control commands of then per three time slots is identical.Hold at NodeB, if power control pattern 0, then each time slot is adjusted a transmitting power according to the power control commands that receives, if power control pattern 1, then per three time slots are adjusted a transmitting power according to the power control commands that receives, but the unqualified NodeB of agreement must carry out according to the method, also can adopt other method to adjust.By this method, can adjust the inner-loop power control frequency, between two of 1.5khz and 500hz, select.
In the WCDMA system, be up power control algorithm parameter PCA or descending power control mode parameter DPC MODE is a customer parameter, generally when link setup, configure by RNC, after link setup, can reshuffle.But RNC does not have any priori in configuration during these two parameters, does not know to be configured to quick inner-loop power control and still be inner-loop power control more at a slow speed.Because the translational speed of UE is slower under most of situation, the performance gain that quick inner-loop power control brings is bigger, so the equipment of most of producer all is default configuration is quick inner-loop power control, and inner-loop power control is more at a slow speed used in system seldom, and just up power control algorithm 2 and descending power control pattern 1 are used less.In addition, the frequency of inner-loop power control also has only two kinds can select at present, can not well adapt to needed different inner-loop power control frequency requirement under the different translational speeds.In other 3-G (Generation Three mobile communication system), inner-loop power control all exists same shortcoming fast.
The front is an example with the WCDMA system, describing in the present 3-G (Generation Three mobile communication system) function of adjusting the inner-loop power control frequency according to the travelling carriage translational speed in detail does not have basically, this original intention that exists in the agreement is not used basically yet, even if can use this function, also can not adapt to the requirement of different inner-loop power control frequencies under the different translational speeds far away.Be example with the WCDMA system equally below, introduce some implementation methods, the frequency of quick inner-loop power control can be changed with translational speed.As for other 3-G (Generation Three mobile communication system) also is to adopt same thinking, just describes no longer for example here.Equally, this thinking also can be generalized in other mobile communication system that has the power control technology.
In the Base-Band Processing of NodeB, in order to improve systematic function, velocity estimation is a significant method.Adjust some parameters of base band algorithm by the UE translational speed of estimating, make it to be adapted to different wireless channel environments, thereby improve systematic function.But in the WCDMA system, velocity estimation is not a necessary technology, and just the equipment utilization velocity estimation of some producer is come some base band parameters of adaptive adjustment.Because these technology are not the technology of agreement regulation, do not have in the agreement of 3GPP in the interface Iub of NodeB and RNC for the translational speed of UE stays interface, so the UE translational speed that NodeB estimates also cannot report to RNC yet.Therefore the UE translational speed of estimating at NodeB can not be used for adjusting the parameter of RRM, the frequency that just cannot utilize the UE translational speed of estimation to regulate inner-loop power control under present protocol frame is just adjusted power control parameters PCA and DPC_MODE.But by change protocol frame or implementation method in various degree, the UE translational speed that just can make full use of estimation changes the frequency of inner-loop power control.
Summary of the invention
The present invention utilizes the travelling carriage translational speed of estimation, and the frequency of adjusting quick inner-loop power control according to translational speed reduces the negative effect of inner-loop power control to optimize the inner-loop power control effect, realizes the optimum Match of inner-loop power control frequency and translational speed.
A kind of inner loop power control method for frequency comprises the following steps:
Be the inner loop power control frequency of the different shelves of travelling carriage coupling of friction speed in the mobile communication system in advance, and the inner loop power control frequency signaling between base station and RNC/BSC and the UE; The speed of travelling carriage is estimated in real time with the selection matched frequency in the base station, and by inner loop power control frequency signaling RNC/BSC and the selected result of UE; Base station, RNC and UE carry out the control of mobile communication system inner loop power according to the selected inner loop power control frequency in base station.
Another kind of down channel inner loop power control method for frequency based on same design, comprise the following steps: that the base station disposes the descending power adjustment cycle of different shelves in advance for the travelling carriage of friction speed, described power adjustment cycle is to be configured to the multiple of 1 time slot at 0 o'clock at the power control mode parameter, is to be configured to the multiple of 3 time slots at 1 o'clock at the power control mode parameter; The adjustment cycle that is complementary is selected in the base station according to the mobile station speed of estimating and power control mode parameter; After the descending power control command of receiving is judged according to the adjustment cycle of selecting in the base station, adjust down transmitting power, described judgement is carried out according to following principle: receive all be the power per liter order in adjustment cycle, then heighten down transmitting power, power command falls if all be, then reduce down transmitting power, otherwise keep down transmitting power constant; The power per liter order of perhaps receiving is then heightened down transmitting power more than falling power command, otherwise turns down down transmitting power.Preferably, described method is when implementing, and RNC/BSC is configured to 0 with the power mode parameters of UE in advance.
Another up channel inner loop power control method for frequency based on same design, comprise the following steps: that RNC/BSC is configured to 1 with the ascending power algorithm parameter of UE in advance, the base station is the uplink power control order release cycle of the different shelves of travelling carriage coupling of different translational speeds in advance; The release cycle that the base station is estimated the speed of travelling carriage in real time and selected to be complementary; The order that rises or fall power is once issued according to the sir value of actual estimated to the UE issue in the base station in each release cycle, all the other are liter that replaces or the control command of falling power; UE adjusts uplink transmission power according to the uplink power control order of base station.
Based on a kind of inner loop power control method for frequency method of same design, comprise the following steps: to be provided with the power control algorithm parameter signalling between the RNC/BSC and base station in the mobile communication system; RNC is by the initial configuration informing base station of power control algorithm parameter signalling with the power control algorithm parameter of UE; The base station is estimated the speed of travelling carriage in real time, when mobile station speed during greater than preset threshold value, travelling carriage power control algorithm parameter is chosen as 1; Otherwise, be chosen as 2, and by power control algorithm parameter signalling notice RNC/BSC; RNC/BSC gives UE with the selected power control algorithm parameter matching in base station; Base station, RNC/BSC and UE carry out the control of mobile communication system inner loop power according to the selected power control algorithm parameter 1 in base station or 2.Preferably scheme is, when the selected power control algorithm parameter 2 of base station, the base station is the uplink power control order release cycle of the different shelves of travelling carriage coupling of different translational speeds in advance, and described release cycle is the multiple of 5 time slots; The release cycle that the base station is estimated the speed of travelling carriage in real time and selected to be complementary; The base station is that the cycle is to the order of UE issue uplink power control with the release cycle, be specially: 5 time slots therein are according to the SIR issue power control command of estimating, the power control command of issue comprises the power control command that once rises or fall at least in all the other per 5 time slots; UE adjusts uplink transmission power according to the uplink power control order.
Using beneficial effect of the present invention is:
1, realizes simply, utilizing this method not increase any expense if in the Base-Band Processing of NodeB, had the velocity estimation technology.
If 2 change agreement, only can increase some signaling consumptions, can fully realize the optimum Match of rate travel and inner-loop power control frequency.
If 3 do not change any part of present agreement, this thinking is allowed by agreement, so do not influence interconnecting of devices from different manufacturers.
4, this method can be utilized inner-loop power control to greatest extent according to present agreement and velocity estimation precision, makes it to be adapted to different wireless channel environments, increases the power control gain, reduces the power control negative effect, improves systematic function, increases power system capacity.
Description of drawings
Below with specific embodiment and be described with reference to the accompanying drawings.
Inner-loop power control gain schematic diagram when Fig. 1 is 1.5khz for the inner-loop power control frequency under the different translational speeds;
Fig. 2 is the best inner-loop power control frequency diagram under the different translational speeds;
Fig. 3 is the FB(flow block) that embodiment two adjusts downlink dedicated channels power control frequency;
Fig. 4 is the FB(flow block) that embodiment two adjusts special uplink channel power control frequency.
Embodiment
Be embodied as the example explanation with the WCDMA system below, in fact, power control principle and the WCDMA of TD-SCDMA and CDMA2000 are consistent, can utilize the method for the invention to carry out the adjustment of inner-loop power control frequency, the BSC (base station controller) in the corresponding CDMA2000 of the RNC of WCDMA and the TD-SCDMA system.
Embodiment one:
The prerequisite that this method realizes is to change protocol frame, and the power control frequency is divided into a plurality of class, and the provisional capital is like this up and down, and can be by signaling with power control frequency notice UE, RNC.NodeB estimates translational speed like this, regulates the power control frequency, and notice RNC and UE, and carry out inner-loop power control according to this frequency this moment, and up-downgoing can be carried out respectively.If NodeB does not estimate translational speed, according to the default parameter setting with carry out.This method changes present agreement significantly, has not had what PCA and DPC_MODE etc.
The time slot of WCDMA system is 0.667ms, and the highest frequency of inner-loop power control is exactly 1.5khz like this.If the frequency configuration with inner-loop power control in agreement is a plurality of class, as 1 time slot adjustment once, 2 time slot adjustment are once ....These frequencies can adaptive adjustment in NodeB, with this frequency notice RNC and UE, also can be immobilized by the parameter setting simultaneously.Like this, if contain the velocity estimation technology among the NodeB, just can realize as the optimum Match between the translational speed of inner-loop power control frequency and UE among Fig. 2 with the frequency of inner-loop power control with the adaptive variation of the translational speed of UE.The power control frequency of agreement regulation regulate the speed and the basis of inner-loop power control frequency class on, if the translational speed precision of estimating is high more, the speed of adjustment can be fast more, the class of frequency can be many more, vice versa, these are controlled by NodeB.The adjustment of the channel of up-downgoing simultaneously can be adjusted respectively according to their feature.If there is not the moving speed estimation technology, the thinking that can adopt present WCDMA agreement to exist is adjusted.
Can find that this method can make full use of the frequency that translational speed is regulated inner-loop power control, the performance gain that brings also can be maximum.But this method is bigger to the protocol changes of the 3-G (Generation Three mobile communication system) of present existence, and the signaling of bringing is more.
Embodiment two:
On the basis of present 3-G (Generation Three mobile communication system), if do not relate to change to agreement, by a bit changing that base station baseband is handled, just can realize the adjustment of the quick inner-loop power control frequency of down channel, RNC is 1 o'clock with the PCA predetermined fixed, also can realize the adjustment of the quick inner-loop power control frequency of up channel.Agreement without any influence, is not just influenced interconnecting of system between different vendor yet.Introduce the realization thinking of this method below.
Downlink dedicated channels is at first described, as shown in Figure 3.For ease of understanding, introduce the descending inner-loop power control method of stipulating in the 3GPPTS25.214 agreement earlier.In the descending inner-loop power control, UE estimates earlier the signal interference ratio of DPCH, then SIR and the target SIR of estimating compared, if the SIR that estimates greater than target SIR, the power of then will begging to surrender, otherwise require power per liter.But UE needed to check earlier the power control mode parameter before producing power control commands, DPC_MODE just, if power control mode parameter DPC_MODE is 0, then each time slot sends different power control commands, if power control mode parameter DPC_MODE is 1, then per three time slots send identical power control commands.The power control mode parameter is a UE parameter, is controlled by RNC.And the agreement regulation, in order to guarantee can to adopt the circule power control method that is different from agreement at NodeB, the transmission of UE end power control commands and algorithm must carry out according to the agreement regulation.Agreement has been advised the power regulating method at the NodeB end, if power control mode parameter DPC_MODE is 0, then the power control commands of each time slot of NodeB demodulation and each time slot are adjusted a transmitting power, if power control mode parameter DPC_MODE parameter is 1, NodeB adjusts a transmitting power with per three time slots.Like this, if the power control mode parameter is 0, then the inner-loop power control frequency is 1.5khz, if the power control mode parameter is 1, then the inner-loop power control frequency is 500hz.
The front is mentioned, and the power control mode parameter because RNC is difficult to know the translational speed of UE, so be difficult to come this parameter of adaptive adjusting according to wireless channel environment, is configured to 0 under the general default situation in the configuration of RNC end.If velocity estimation is arranged in NodeB, can pass through some small changes, do not need to change the adjustment that agreement just realizes descending inner-loop power control frequency, make it to be adapted to different UE translational speeds.For example when the power control mode parameter was 0, the power control frequency of itself was 1.5khz, if the UE translational speed of estimating is slower, the inner-loop power control frequency is the systematic function optimum when the 1.5khz left and right sides, can not add any adjustment.When if translational speed is very fast, suggestion changes the inner-loop power control frequency into 500hz, can change per three time slot adjustment like this into once.Method of operation can be as follows: if the order that increases power in three time slots that NodeB receives greater than the order that reduces power, power per liter then, otherwise fall power.Also can adopt following method: if three time slots that NodeB receives all require to increase power, then increase power,, then reduce power, otherwise transmitting power remains unchanged if three time slots all require to reduce power.Equally,, also can adopt top thinking to change the power control frequency, judge once and adjustment as per 5 time slots if the inner-loop power control frequency that requires is lower.According to the method, the adjustment cycle that the base station can be different according to the speed setting of travelling carriage, for example: 10 time slots, 15 time slots etc., thus reach the purpose of adjusting descending inner-loop power control frequency.
Equally also finding, is 1 o'clock at the power control mode parameter exactly, also can adopt this method, makes the frequency of inner-loop power control lower.At this moment, adjustment cycle is set with the multiple of 3 time slots in the base station, as: 6 time slots, 15 time slots etc.For example the power control mode parameter is 1 o'clock, and the power control frequency is 500hz, and per three time slot adjustment once judge if increase once according to the power control commands of these three time slots again, judges that once promptly adjustment cycle is 15 time slots per five times, and power control frequency like this has been exactly 100hz.
Can find, adopt this method, can adjust the frequency of downlink dedicated channels inner-loop power control, make it to change along with the translational speed of estimating, improve systematic function, be simultaneously in the scope that agreement is permitted, and do not influence interconnecting of any equipment.
Special uplink channel is once then described, as shown in Figure 4.For ease of understanding, introduce the up inner-loop power control method of stipulating in the 3GPPTS25.214 agreement earlier.In the up inner-loop power control, NodeB estimates the signal interference ratio of DPCH earlier, then SIR and the target SIR of estimating is compared, if the SIR that estimates is greater than target SIR, the power of then will begging to surrender, otherwise require power per liter, this process is that each time slot carries out once, and is irrelevant with power control algorithm parameter PCA.But UE needed to check earlier power control algorithm parameter, just PCA before adjusting transmitting power.If power control algorithm parameter PCA is 1, then each time slot is adjusted a transmitting power, carries out according to power control commands.If power control algorithm parameter PCA is 2, then per five time slots are adjusted a transmitting power, and five time slots all require then power per liter of power per liter, and power then falls in the power of all will begging to surrender, otherwise constant, so this moment, the inner-loop power control frequency reduced greatly.The same with DPC_MODE, power control algorithm parameter PCA is configured to 1 in the configuration of RNC end under the general default situation.The same with downlink dedicated channels, if special uplink channel power control algorithm 1 time, can be realized adjusting the inner-loop power control frequency with reference to Fig. 2 according to different UE translational speeds.As per 5 time slots is one-period, and the power control commands of preceding four time slots of NodeB is not to obtain according to the SIR that estimates, but alternately sends the lifting order, is insignificant power control commands, and the 5th time slot just launched meaningful power control commands according to the SIR that estimates.Like this, preceding four time slots are nonsensical power control commands, UE adjusts transmitting power according to these orders, although alternately lifting, but constant the 5th time slot of gross power adjusted transmitting power according to significant power control commands again, certainly the adjustment cycle of front also can be adjusted, and is one-period as 10 time slots.
By power control algorithm of introducing previously 1 and 2 difference, can find that this method no longer includes meaning power control algorithm 2 times, adopt the method for front to send power control commands as NodeB, UE may keep transmitting power constant forever.Because present Node and do not know the power control algorithm of special uplink channel in the agreement of WCDMA, the power control algorithm is by the RNC configuration, so there is risk in this method.If but holding power control algorithm parameter fixed configurations at RNC when system parameter setting is 1, this method just can be no problem.If NodeB and RNC come from a producer, equally the power control algorithm parameter is configured to 1 just passablely, just can there be any risks in this method, and can improve systematic function.
Can find in sum, utilize the UE translational speed of estimating, can effectively adjust the inner-loop power control frequency, make it to be adapted to different wireless channel environments, increase the performance gain that inner-loop power control brings to greatest extent, eliminate the negative influence of inner-loop power control simultaneously.This in addition method without any influence, is again to allow in the agreement to agreement simultaneously, and down channel especially is not so can influence interconnecting between the devices from different manufacturers yet.
Embodiment three:
Mention among the embodiment two, increasing some signalings on the agreement basis at present, part irrealizable channel (up channel is 2 o'clock at the power control algorithm as described previously) in 2 can realize that also the inner-loop power control frequency changes with translational speed.Be that example is described below equally with the special uplink channel.
The front is mentioned, and special uplink channel is not changing under the agreement situation, also can realize the inner-loop power control frequency with the translational speed adjustment, but has two problems.At first being that the power control algorithm can not be realized for 2 times, must be 1 with power control algorithm fixed configurations at RNC, otherwise can't adjust the power control frequency this moment.Uncomfortable in addition haircuting when penetrating power be not to keep transmitting power constant, but transmitting power alternately rises and descends.If increase a signaling in the agreement, with up channel power control algorithm parameter notice NodeB, NodeB knows the power control algorithm to RNC by signaling, and two problems in front can be avoided.
The power control algorithm can adopt the method for front 1 time equally, and the power control algorithm adopts following method 2 times: if do not add adjustment, carrying out according to agreement, is exactly default method of adjustment of agreement and frequency.The inner-loop power control frequency continues to reduce if desired, can be 1 cycle with 10 time slots, and the power control commands of preceding 5 time slot NodeB emission rises and falls all and contains, like this, UE will can not adjust transmitting power, and 5 time slots in back carry out according to agreement, adjust frequency like this and continue to reduce.But this method is than the power control algorithm of introducing previously 1 time, and the flexibility that the power control frequency is adjusted is little, must be 1 cycle with the integral multiple of 5 time slots.But also there is advantage in this method 1 time than front power control algorithm, and uncomfortable exactly haircuting when penetrating power is to keep power constant, rather than the alternately appearance of rising and descend, and helps the power control performance so more.Certainly, it is the timeslot number of multiple with 5 that the power control cycle also can change other into, and as 15, the implementation method basically identical all is that the lifting power control commands all contains in per 5 time slots in front, and last five time slots send power control commands according to agreement.
Introduction by the front can find, if there is the velocity estimation technology among the NodeB, and can be according to the quick inner-loop power control frequency of estimating of the adaptive adjustment of travelling carriage translational speed.On the basis that changes present 3-G (Generation Three mobile communication system) agreement, this thinking can be utilized.If do not change present agreement, this method also can obtain meaningful utilization.Thereby the raising systematic function increases power system capacity.
In sum: from the angle of agreement the frequency of quick inner-loop power control is divided into a plurality of class, just can realizes the optimum Match between travelling carriage translational speed and the inner-loop power control frequency according to the frequency of the different quick inner-loop power controls of translational speed adjustment; On the basis of present 3-G (Generation Three mobile communication system),,, just can realize the adjustment of the quick inner-loop power control frequency of local channel by a bit changing that base station baseband is handled if do not relate to change to agreement.Agreement without any influence, is not just influenced interconnecting of system between different vendor yet; Increasing some signalings on the agreement basis at present, can realize that also the quick inner-loop power control frequency of local channel changes with translational speed; Whole process only by a minor alteration in the Base-Band Processing, just can improve systematic function, increases power system capacity, does not increase any complexity of system; To quick inner-loop power control frequency adjust frequency and the class of frequency is divided and can be adjusted according to the moving speed estimation for mobile station precision, high more as estimated accuracy, the adjustment of power control frequency can be fast more, the class of inner-loop power control frequency is divided can be thin more.
Thinking of the present invention and implementation method can be used in the 3-G (Generation Three mobile communication system) that comprises WCDMA, also can be used in other mobile communication system that comprises rapid power control, and this paper only illustrates with the WCDMA system, does not limit protection range with this.
Claims (8)
1, a kind of inner loop power control method for frequency is characterized in that, comprises the following steps:
Be the inner loop power control frequency of the different shelves of travelling carriage coupling of friction speed in the mobile communication system in advance, and the inner loop power control frequency signaling between base station and RNC/BSC and the UE;
The speed of travelling carriage is estimated in real time with the selection matched frequency in the base station, and by inner loop power control frequency signaling RNC/BSC and the selected result of UE;
Base station, RNC/BSC and UE carry out the control of mobile communication system inner loop power according to the selected inner loop power control frequency in base station.
2, a kind of down channel inner loop power control method for frequency is characterized in that, comprises the following steps:
The base station is the descending power adjustment cycle of the different shelves of travelling carriage configuration of friction speed in advance, and described power adjustment cycle is to be configured to the multiple of 1 time slot at 0 o'clock at the power control mode parameter, is to be configured to the multiple of 3 time slots at 1 o'clock at the power control mode parameter;
The adjustment cycle that is complementary is selected in the base station according to the mobile station speed of estimating and power control mode parameter;
After the descending power control command of receiving is judged according to the adjustment cycle of selecting in the base station, adjust down transmitting power, described judgement is carried out according to following principle: receive all be the power per liter order in adjustment cycle, then heighten down transmitting power, power command falls if all be, then reduce down transmitting power, otherwise keep down transmitting power constant; The power per liter order of perhaps receiving is then heightened down transmitting power more than falling power command, otherwise turns down down transmitting power.
3, a kind of up channel inner loop power control method for frequency is characterized in that, comprises the following steps:
RNC/BSC is configured to 1 with the ascending power algorithm parameter of UE in advance, and the base station is the uplink power control order release cycle of the different shelves of travelling carriage coupling of different translational speeds in advance;
The release cycle that the base station is estimated the speed of travelling carriage in real time and selected to be complementary;
The order that rises or fall power is once issued according to the sir value of actual estimated to the UE issue in the base station in each release cycle, all the other are liter that replaces or the control command of falling power;
UE adjusts uplink transmission power according to the uplink power control order of base station.
4, method as claimed in claim 3 is characterized in that, also comprises the following steps:
The base station is the descending power adjustment cycle of the different shelves of travelling carriage configuration of friction speed in advance, and described power adjustment cycle is to be configured to the multiple of 1 time slot at 0 o'clock at the power control mode parameter, is to be configured to the multiple of 3 time slots at 1 o'clock at the power control mode parameter;
The adjustment cycle that is complementary is selected in the base station according to the mobile station speed of estimating and power control mode parameter;
After the descending power control command of receiving is judged according to the adjustment cycle of selecting in the base station, adjust down transmitting power, described judgement is carried out according to following principle: receive all be the power per liter order in adjustment cycle, then heighten down transmitting power, all be to fall power command, then turn down down transmitting power, otherwise down transmitting power is constant; The power per liter order of perhaps receiving is then heightened down transmitting power more than falling power command, otherwise turns down down transmitting power.
5, a kind of inner loop power control method for frequency is characterized in that, comprises the following steps:
Power control algorithm parameter signalling between the RNC/BSC and base station in the mobile communication system is set;
RNC/BSC is by the initial configuration informing base station of power control algorithm parameter signalling with the power control algorithm parameter of UE;
The base station is estimated the speed of travelling carriage in real time, when mobile station speed during greater than preset threshold value, travelling carriage power control algorithm parameter is chosen as 1; Otherwise, be chosen as 2, and by power control algorithm parameter signalling notice RNC/BSC;
RNC/BSC gives UE with the selected power control algorithm parameter matching in base station;
Base station, RNC/BSC and UE carry out the control of mobile communication system inner loop power according to the selected power control algorithm parameter 1 in base station or 2.
6, method as claimed in claim 5 is characterized in that, when the selected power control algorithm parameter 1 of base station, also comprises the following steps:
The base station is the uplink power control order release cycle of the different shelves of travelling carriage coupling of different translational speeds in advance;
The release cycle that the base station is estimated the speed of travelling carriage in real time and selected to be complementary;
The order that rises or fall power is once issued according to the sir value of actual estimated to the UE issue in the base station in each release cycle, all the other are liter that replaces or the control command of falling power;
UE adjusts uplink transmission power according to the uplink power control order of base station.
7, method as claimed in claim 6 is characterized in that, also comprises the following steps:
The base station is the descending power adjustment cycle of the different shelves of travelling carriage configuration of friction speed in advance, and described power adjustment cycle is to be configured to the multiple of 1 time slot at 0 o'clock at the power control mode parameter, is to be configured to the multiple of 3 time slots at 1 o'clock at the power control mode parameter;
The adjustment cycle that is complementary is selected in the base station according to the mobile station speed of estimating and power control mode parameter;
After the descending power control command of receiving is judged according to the adjustment cycle of selecting in the base station, adjust down transmitting power, described judgement is carried out according to following principle: receive all be the power per liter order in adjustment cycle, then heighten down transmitting power, otherwise turn down down transmitting power; The power per liter order of perhaps receiving is then heightened down transmitting power more than falling power command, otherwise turns down down transmitting power.
8, method as claimed in claim 5 is characterized in that, when the selected power control algorithm parameter 2 of base station, described method also comprises the following steps:
The base station is the uplink power control order release cycle of the different shelves of travelling carriage coupling of different translational speeds in advance, and described release cycle is the multiple of 5 time slots;
The release cycle that the base station is estimated the speed of travelling carriage in real time and selected to be complementary;
The base station is that the cycle is to the order of UE issue uplink power control with the release cycle, be specially: 5 time slots therein are according to the SIR issue power control command of estimating, the power control command of issue comprises the power control command that once rises or fall at least in all the other per 5 time slots;
UE adjusts uplink transmission power according to the uplink power control order.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100561267A CN100353681C (en) | 2004-08-12 | 2004-08-12 | Inner ring power frequency control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100561267A CN100353681C (en) | 2004-08-12 | 2004-08-12 | Inner ring power frequency control method |
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| CN1734963A CN1734963A (en) | 2006-02-15 |
| CN100353681C true CN100353681C (en) | 2007-12-05 |
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| CNB2004100561267A Expired - Fee Related CN100353681C (en) | 2004-08-12 | 2004-08-12 | Inner ring power frequency control method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179306B (en) * | 2006-11-10 | 2012-01-25 | 电信科学技术研究院 | Method and system of transmitting power control command word |
| EP2051454A1 (en) * | 2007-10-17 | 2009-04-22 | Nokia Siemens Networks Oy | Method and device for data communication and communication system comprising such device |
| CN102056278B (en) * | 2009-10-29 | 2014-10-22 | 中兴通讯股份有限公司 | Base station and method for controlling inner ring power |
| CN103312397A (en) * | 2012-03-16 | 2013-09-18 | 华为技术有限公司 | Pre-coding method, system and device |
| CN102647775B (en) * | 2012-04-26 | 2015-03-11 | 华为技术有限公司 | Inner-loop power control processing method, system and radio network controller |
| CN107079408B (en) * | 2015-08-21 | 2020-02-14 | 华为技术有限公司 | Power adjustment method and device |
| CN108377461B (en) * | 2016-11-07 | 2021-05-07 | 中国移动通信有限公司研究院 | Power control method and base station |
| CN107197511B (en) * | 2017-07-07 | 2020-04-14 | 京信通信系统（中国）有限公司 | Power adjustment method and system |
| MX2021008048A (en) | 2019-02-02 | 2021-09-08 | Zte Corp | Method for ue power saving. |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308422A (en) * | 2000-02-07 | 2001-08-15 | 松下电器产业株式会社 | Radio communiation equipment and its emitted power controlling method |
| JP2003348011A (en) * | 2002-05-23 | 2003-12-05 | Ntt Docomo Inc | Method for determining control cycle of transmission power offset in soft handover and radio controller |
| US20040002352A1 (en) * | 2002-06-27 | 2004-01-01 | Andrew Sendonaris | Adjusting transmit power in a wireless communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308422A (en) * | 2000-02-07 | 2001-08-15 | 松下电器产业株式会社 | Radio communiation equipment and its emitted power controlling method |
| JP2003348011A (en) * | 2002-05-23 | 2003-12-05 | Ntt Docomo Inc | Method for determining control cycle of transmission power offset in soft handover and radio controller |
| US20040002352A1 (en) * | 2002-06-27 | 2004-01-01 | Andrew Sendonaris | Adjusting transmit power in a wireless communication system |
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