CN102281618A - Method and device for power control - Google Patents
Method and device for power control Download PDFInfo
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- CN102281618A CN102281618A CN2010102031059A CN201010203105A CN102281618A CN 102281618 A CN102281618 A CN 102281618A CN 2010102031059 A CN2010102031059 A CN 2010102031059A CN 201010203105 A CN201010203105 A CN 201010203105A CN 102281618 A CN102281618 A CN 102281618A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/362—Aspects of the step size
Abstract
The invention discloses a method and a device for power control, wherein the method for power control comprises the following steps of: setting a current power regulation step according to a current channel attenuation state and a previous power regulation step; and controlling a transmitting power according to the current power regulation step. The method and the device solve the problems that, in the prior art, a fixed step is used for the power control, consequently, convergence in faster attenuating channels is not enough and the communication quality becomes worse, so that the communication quality is ensured.
Description
Technical field
The present invention relates to field of wireless communication, in particular to a kind of method and apparatus of power control.
Background technology
Power control algorithm is analyzed and is studied from two levels usually.If analyze from the level of the overall situation, whether power control can satisfy all users' SIR (signal-to-jamming ratio, Signal to Interference Ratio) requirement.If analyze power control algorithm convergence and convergence rate from the level of part, promptly follow the trail of the ability of channel variation, be the emphasis of power control algorithm research.
UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system) in the system, channel is realized power control by reverse link, the power control that is to say up link is to adjust by the instruction of carrying in the down link, such as at TD-SCDMA (Time Division-Synchronous Code Division MultipleAccess, TD SDMA) each subframe (5ms) is carried out a power control in the system, power control speed is 200HZ, and power control step-size is 1dB, 2dB, the optional fixed numbers of 3dB.
The generation of power control command is to be compared by sir value and desired value that receiving terminal detects received signal, if SIR＜sir target value, then produce the control command that increases transmitting power, otherwise then can require the other side to reduce transmitting power, the power adjustment instruction here is exactly TPC (Transmit Power Control).All indicate power to adjust the adjustment amount of step-length in the adjustment process of these TPC, receiving terminal is received the transmitting power of correspondingly raising or reduce a step-length behind the TPC.
The method of the power control of existing a lot of research wireless communication systems in the prior art, these methods adopt fixed step size to adjust power.
The inventor finds, because the diversity and the complexity of channel circumstance, some drawbacks have been caused, such as in the channel that declines faster, make power control restrain or catch up with the rate of fading of channel quickly if the communication party can not in time adjust step-length, then can cause the interruption of link because of the deterioration of communication quality.And in existing technology,, thereby cause the convergence deficiency in the channel faster declining because fixed step size is adopted in power control, cause the problem of the deterioration of communication quality.
Summary of the invention
Main purpose of the present invention is to provide a kind of method and apparatus of power control, solving at least in the existing technology because fixed step size is adopted in power control, causes the convergence deficiency in the channel faster declining, and causes the problem of the deterioration of communication quality.
According to an aspect of the present invention, provide a kind of method of power control, it comprises: according to current fading channel state and previous power adjustment step-length current power adjustment step-length is set; Use above-mentioned current power to adjust step-length and carry out the control of transmitting power.
Further, adjusting step-length according to current fading channel state and previous power is provided with current power and adjusts step-length and comprise: above-mentioned current power is adjusted step-length and is set to absolute value greater than above-mentioned previous power adjustment step-length; Perhaps above-mentioned current power is adjusted step-length and is set to 0.
Further, when above-mentioned current channel was deep fading's state, above-mentioned current power is adjusted step-length and is set to comprise greater than the absolute value length that above-mentioned previous power is adjusted step-length: above-mentioned current power was adjusted step-length and is set to the integral multiple that previous power is adjusted the absolute value of step-length.
Further, at above-mentioned current channel is deep fading's state, and it is above-mentioned depth attenuation's state under or during the adjustment of the power under above-mentioned depth attenuation's gain-state step-length that the above-mentioned previous power that above-mentioned current power is adjusted the predetermined quantity before the step-length is adjusted step-length, above-mentioned current power is adjusted step-length and is set to comprise greater than the absolute value that above-mentioned previous power is adjusted step-length: above-mentioned current power is adjusted step-length and is set to (1+A%) times that above-mentioned previous power is adjusted the absolute value of step-length, wherein, 0＜A＜50.
Further, adjusting step-length according to current fading channel state and previous power is provided with current power and adjusts step-length and comprise: at above-mentioned current channel during for depth attenuation's state, judge whether nearest M/2 above-mentioned previous power adjustment step-length all is not more than 0, wherein, preserve nearest M above-mentioned previous power in advance and adjust step-length, M is a natural number; If all be not more than 0, then above-mentioned current power is adjusted the absolute value that step-length is set to adjust greater than above-mentioned previous power step-length.
Further, judge above-mentioned current fading channel state by following steps: adjust step-length if M before above-mentioned previous power adjustment step-length of above-mentioned current power adjustment step-length is calibration power, then above-mentioned current channel is depth attenuation's state, wherein, M is a natural number, and above-mentioned calibration power is adjusted step-length greater than 0; If above-mentioned current power adjust M above-mentioned previous power before the step-length adjust step-length be above-mentioned calibration power adjust discreet value that step-length and above-mentioned current power adjusts step-length greater than 0 and above-mentioned M above-mentioned previous power adjust preceding M/2 above-mentioned previous power in the step-length to adjust step-length be above-mentioned depth attenuation's state under or the adjustment of the power under above-mentioned depth attenuation's gain-state step-length, then above-mentioned current channel is depth attenuation's gain-state; If M the above-mentioned previous power that above-mentioned current power is adjusted before the step-length is adjusted step-length all less than 0, then above-mentioned current channel is conventional state.
Further, above-mentioned M is more than or equal to the number of judging the power adjustment step-length that the channel quality downward trend is required.
Further, using above-mentioned current power adjustment step-length to carry out power control comprises: adjust the step size computation current transmit power according to above-mentioned current power; Judge that whether above-mentioned current transmit power is greater than the power control threshold value; If greater than, then stop to increase transmitted power.
Further, portable terminal and/or network equipment are carried out the method for above-mentioned power control.
According to a further aspect in the invention, provide a kind of device of power control, having comprised: the unit has been set, is used for current power adjustment step-length being set according to current fading channel state and previous power adjustment step-length; Control unit is used to use above-mentioned current power to adjust step-length and carries out the control of transmitting power.
Further, the above-mentioned unit that is provided with comprises: module is set, is used for above-mentioned current power and adjusts the absolute value that step-length is set to adjust greater than above-mentioned previous power step-length, perhaps, above-mentioned current power is adjusted step-length and is set to 0.
Further, the above-mentioned module that is provided with comprises: first is provided with submodule, is used for above-mentioned current power and adjusts the integral multiple that step-length is set to the absolute value of previous power adjustment step-length; Second is provided with submodule, be used for above-mentioned current power adjust step-length be set to above-mentioned previous power adjust step-length absolute value (1+A%) doubly, wherein, 0＜A＜50.
Further, the above-mentioned unit that is provided with comprises: judge module, be used for when above-mentioned current fading channel state is the depth attenuation, judge whether nearest M/2 above-mentioned previous power adjustment step-length all is not more than 0, wherein, preserve nearest M above-mentioned previous power in advance and adjust step-length, M is a natural number; Processing module is used for all being not more than at 0 o'clock, and above-mentioned current power is adjusted the absolute value that step-length is set to adjust greater than above-mentioned previous power step-length.
Further, said apparatus also comprises: judging unit, above-mentioned judging unit is used for judging above-mentioned current fading channel state by following steps: if above-mentioned current power is adjusted step-length M before above-mentioned previous power adjustment step-length is that calibration power is adjusted step-length, then above-mentioned current channel is depth attenuation's state, wherein, M is a natural number, and above-mentioned calibration power is adjusted step-length greater than 0; If above-mentioned current power adjust M above-mentioned previous power before the step-length adjust step-length be calibration power adjust discreet value that step-length and above-mentioned current power adjusts step-length greater than 0 and above-mentioned M above-mentioned previous power adjust preceding M/2 above-mentioned previous power in the step-length to adjust step-length be above-mentioned depth attenuation's state under or the adjustment of the power under above-mentioned depth attenuation's gain-state step-length, then above-mentioned current channel is depth attenuation's gain-state; If M the above-mentioned previous power that above-mentioned current power is adjusted before the step-length is adjusted step-length all less than 0, then above-mentioned current channel is conventional state.
The present invention is provided with current power adjustment step-length according to current fading channel state and previous power adjustment step-length, make current power adjustment step-length and current fading channel state adapt, thereby can correct the transmitting power that is in antenna under the deep fade environment apace.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the method for the power control of the embodiment of the invention;
Fig. 2 is the preferred flow charts according to the method for the power control of the embodiment of the invention;
Fig. 3 is the structural representation according to the device of the power control of the embodiment of the invention;
Fig. 4 is the high-level schematic functional block diagram according to the device of the power control of the embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Fig. 1 is the flow chart according to the method for the power control of the embodiment of the invention.As shown in Figure 1, the method for this power control comprises:
S102 is provided with current power adjustment step-length according to current fading channel state and previous power adjustment step-length;
S104 uses above-mentioned current power to adjust step-length and carries out the control of transmitting power.
In the prior art, fixed step size is adopted in power control, thereby causes the convergence deficiency in the channel faster declining, and causes the problem of the deterioration of communication quality.Review the present invention, according to current fading channel state and previous power adjustment step-length current power adjustment step-length is set, make current power adjustment step-length and current fading channel state adapt, thereby can correct the transmitting power that is in antenna under the deep fade environment apace.
Preferably, adjusting step-length according to current fading channel state and previous power is provided with current power and adjusts step-length and comprise: described current power is adjusted step-length and is set to absolute value greater than described previous power adjustment step-length; Perhaps described current power is adjusted step-length and is set to 0.
Preferably, when described current channel is deep fading's state, described current power is adjusted step-length and is set to comprise greater than the absolute value length that described previous power is adjusted step-length: described current power is adjusted step-length and is set to the integral multiple that previous power is adjusted the absolute value of step-length, preferably, described current power is adjusted step-length and is set to 2 times of absolute value that previous power is adjusted step-length.
Preferably, at described current channel is deep fading's state, and it is described depth attenuation's state under or during the adjustment of the power under described depth attenuation's gain-state step-length that the described previous power that described current power is adjusted the predetermined quantity before the step-length is adjusted step-length, described current power is adjusted step-length and is set to comprise greater than the absolute value that described previous power is adjusted step-length: described current power is adjusted step-length and is set to (1+A%) times that described previous power is adjusted the absolute value of step-length, wherein, 0＜A＜50.
For example, when the M/2 before current power is adjusted step-length previous power is adjusted step-length and is calibration power and adjusts 2 times of absolute value of step-length, think that then current channel enters depth attenuation's gain-state, described current power adjust step-length be set to described previous power adjust step-length absolute value (1+A%) doubly, wherein, 0＜A＜50.Above-mentioned M is a natural number.
Preferably, adjusting step-length according to current fading channel state and previous power is provided with current power and adjusts step-length and comprise: at described current channel during for depth attenuation's state, judge nearest M/2 described previous power adjustment step-length (just, the M/2 of Bao Cuning described previous power is adjusted step-length at last) whether all be not more than 0, wherein, preserve nearest M described previous power in advance and adjust step-length, M is a natural number; If all be not more than 0, then described current power is adjusted the absolute value that step-length is set to adjust greater than described previous power step-length.
Preferably, adjust step-length according to the nearest M that preserves in advance previous power and judge current channel status, wherein, M is a natural number, and it comprises:
1) adjust step-length if M before described previous power adjustment step-length of described current power adjustment step-length is calibration power, then described current channel is depth attenuation's state, and wherein, described calibration power adjustment step-length is greater than 0;
2) if described current power adjust M described previous power before the step-length adjust step-length be calibration power adjust discreet value that step-length and described current power adjusts step-length greater than 0 and described M described previous power adjust preceding M/2 described previous power in the step-length to adjust step-length be described depth attenuation's state under or the adjustment of the power under described depth attenuation's gain-state step-length, then described current channel is depth attenuation's gain-state;
For example, when the M/2 before current power is adjusted step-length previous power is adjusted step-length and is calibration power and adjusts 2 times of absolute value of step-length, think that then current channel enters depth attenuation's gain-state, described current power adjust step-length be set to described previous power adjust step-length absolute value (1+A%) doubly, wherein, 0＜A＜50.
3) adjust step-length all less than 0 if described current power is adjusted a step-length M before described previous power, then described current channel is conventional state.
Preferably, described M is more than or equal to the number of judging the power adjustment step-length that the channel quality downward trend is required.Adjust step-length by the previous power of selecting to preserve fair amount, avoided because not enough or because the too fast problem of the too small convergence that causes of M value of the excessive power control convergence that causes of M value.
Preferably, using described current power adjustment step-length to carry out power control comprises: adjust the step size computation current transmit power according to described current power; Judge that whether described current transmit power is greater than the power control threshold value; If greater than, then stop to increase transmitted power.In this way, the adjustment total amount of transmitting power is controlled, suppressed the interference that bigger power control step-length is brought.Simultaneously, transmitting power can not surpass the maximum transmitting power that allows, and does not then increase if surpass, and corresponding power control step-length is output as 0.
Preferably, portable terminal and/or network equipment are carried out the method for the power control in above-mentioned each preferred embodiment.Method by the power that uses the foregoing description on portable terminal and network equipment is simultaneously controlled makes the up-downgoing channel resist the channel depth attenuation jointly, thereby can implement power control better.
Preferably, according to current fading channel state and previous power adjustment step-length current power adjustment step-length is set, if the communication counterpart requirement increases transmitting power after being in deep fading's state, then described current power is adjusted the absolute value that step-length is set to adjust greater than previous described power step-length, it specifically comprises: described current power is adjusted step-length and is set to the integral multiple that previous power is adjusted the absolute value of step-length, preferably, current power is adjusted step-length and is set to 2 times of absolute value that previous power is adjusted step-length.
If receive during above-mentioned state to require to reduce transmitting power that the power control commands word is less than 0, then power is adjusted step-length and is set to 0, does not promptly reduce transmitting power.
Preferably, after current channel was in deep fading's subpattern degree of depth gain-state, described current power was adjusted step-length and is set to comprise greater than the absolute value that described previous power is adjusted step-length:
1) if entered deep fading's pattern, and nearest M/2 words that the power control step-length all is 2 times a standard value, illustrate that exactly current power control do not satisfy the pace of change of channel as yet, do not restrain, so current power adjust step-length be set to described previous power adjust step-length absolute value (1+A%) doubly, wherein, 0＜A＜50.
2) if receive the order that requires to reduce transmitting power during this state, the power control commands word is less than 0, and then power is adjusted step-length and is set to 0, does not promptly reduce transmitting power.
In above-mentioned preferred embodiment, power adjustment step-length is changed and dynamic change according to the reduction of speed rate that declines of channel, make power control convergence fast to have guaranteed not to be subjected to the effect minimum of channel fluctuation again to algorithm, guaranteed communication quality.
Preferably, when described current fading channel state was conventional state, it was the original fixed step-length that power is adjusted step-length.
For the present invention is described better, the DPCH channel of following with the TD-SCDMA system is illustrated below.
The TPC command word that can control the up DPCH of following channel is carried in the base station in the descending DPCH of following channel, same UE also carries the TPC command word of the descending DPCH of the following channel of control by the up DPCH of following channel, they transmit into corresponding relation at particular time-slot, and two such channels have just constituted the power control system of a closed loop.
It will be understood by those skilled in the art that, utilize a pair of up-downgoing in the TD-SCDMA wireless communication system to follow the DPCH channel to describe embodiments of the invention in conjunction with the accompanying drawings in detail, this is a kind of example, but the present invention not only only is used for this two channels, and every up-downgoing channel that has TPC power adjustment mechanism that can constitute closed-loop system can be used.
Before describing the described embodiment of Fig. 2, at first channel circumstance is discerned.By observing the TPC record of statistics receiving terminal, can know the effect of the power control in a period of time, if a plurality of rising order continuously, so just represent current channel quality relatively poor, so just thinking that it is in the deep fade pattern, certainly, also can be the several modes of other definition here, the concrete statistic record that only needs to observe TPC gets final product, and has finished the identification of channel circumstance this moment.Next need different channel circumstances is taked corresponding service strategy, suppose to be in the deep fade pattern this moment, so just take corresponding step-length to adjust strategy output power control step-length.At last,, cause interference to other users in order to prevent the too high lifting of power, so, the power of lifting in the certain hour section is carried out total amount suppress.At last, enter the power control process of next round.
In the present embodiment, the power of TPC indication is adjusted step-length and has been represented the relative rising and the decline of transmitting power, and no longer is concrete adjustment magnitude.
The current pairing power control mode of fading channel state can be for one of following:
(1) normal mode:, determine that then the current pairing power control mode of fading channel state is a normal mode if do not occur M continuous non-power per liter order (adjustment amount of transmitting power can be 0dB) in the power control gain register.
(2) pattern that declines deeply: if occur M normal mode postiive gain value down continuously in the power control gain register, then definite current pairing power control mode of fading channel state is the pattern that declines deeply.
(3) gain mode that declines deeply: under the pattern that declines deeply, current TPC (M)＞0, and preceding M/2 power control gain recording TPC (M-1) ... TPC (M/2) is the power or the gain power that declines deeply of declining deeply, determines that then the current pairing power control mode of fading channel state is the gain mode that declines deeply.
In the present embodiment, the fast liter slowly fallen algorithm and can be described below:
(1) decline deeply pattern control: if the TPC that newly receives under the pattern that declines deeply greater than 0, then doubles the transmitting power of basic step-length; If this TPC is less than 0, power increment is 0.
(2) decline deeply gain mode control: if the TPC that newly receives greater than 0, increases the gain of A% again on the basis of a preceding power control amount of gain, if TPC less than 0, power increment is 0.
(3) normal mode control: increase or reduce transmitting power with basic power control step-length.
Do not change the TPC content of carrying in its message according to the method for the embodiment of the invention, but adjust the antenna output variable according to the situation of change of the TPC on the respective channel.The step-length of power control is adjusted variable quantity and all is recorded in the corresponding power control gain register, uses in order to state recognition and power control adjustment.
Fig. 2 is that it comprises the steps: according to the preferred flow charts of the method for the power control of the embodiment of the invention
Step S200, detect the TPC command word of carrying in the up DPCH of the following channel, make TPC=+1, upgrade TPC command word or power control gain data, and be stored in the power control gain register, this register is the queue structure of first in first out formula, and when netinit, status register contents is " 0 ", indication " conventional attitude ", for example, be " 000001 " with power control gain register content update, suppose M=6 here.
Step S201 judges whether full queue of power control gain register, if full, then goes to step S202; Otherwise, go to step S201.In the present embodiment, the power control algorithm makes preceding M-1 behind the netinit be recorded as the TPC that follows channel to carry from up, and directly output action follows the power control of channel to export in descending, since M TPC, enter step S202 behind the full queue of power control gain register just, suppose that this moment, content was " 11 11 11 ".
Step S202, the status indicator position of detected state register if this is designated pattern that declines deeply (being also referred to as depth attenuation's pattern) or the gain mode that declines deeply (being also referred to as depth attenuation's gain mode), then goes to step S204; Otherwise, go to step S203.
Step S203 judges whether to enter the pattern that declines deeply.Increase the power command sample continuously if occur M in the power control gain register, for example, " 111111 " among the step S201 then enter step S207, then enter step S208 as not satisfying this condition.
Step S204 judges whether that rollback is to normal mode.Detect in this record whether up-to-date M/2 the non-power per liter order that occur continuously,,, judge otherwise enter step S205 if having then enter step S208 such as " 2220 0-1 ".
Step S205 judges whether to enter the gain mode that declines deeply.Particularly, detect the power control gain register, judge whether it is in the gain mode that declines deeply: if current TPC＞0, and preceding M/2 power control gain recording is for declining deeply continuously or declining gain power deeply, then enter step S206 as sample " 1202 21 ", as not satisfying above-mentioned condition, the attitude of then remaining stationary.Make network have adaptive ability by the power control gain module to declining deeply in various degree.
Step S206 enters the gain mode that declines deeply, if TPC (M)＞0, increases power with the A% amplitude on the basis of power control last time amount, that is, current power control step-size be set to last power adjust step-length absolute value (1+A%) doubly; If TPC (M)＜0, then do not increase transmitting power, promptly keep former transmitting power, make that current power control step-size is 0, enter step S209.
Step S207 enters the pattern that declines deeply, if TPC (M)＞0, then the basic step-length with twice increases transmitting power, that is, current power control step-size is set to 2 times of absolute value that last power is adjusted step-length; If TPC (M)＜0, then do not issue additional and penetrate power, promptly keep former transmitting power, make that current power control step-size is 0.The sample value of this moment is " 111 112 " or " 111220 ", enters step S209.
Step S208 enters normal mode, adjusts step-length with agreement specified standard power and adjusts, and update mode and power control gain register enter step S209 then.
Step S209, gain suppresses, the power that declines deeply in the statistical gain register (comprising the gain power that declines deeply) sum, this value is designated as SumTPC, if greater than power control threshold T hMax, then no longer increases transmitting power.Meanwhile, adjusted power output can not exceed total transmitting power.
Step S210 exports the descending DPCH channel (Dedicated PhysicalChannel, DPCH) of following and adjusts performance number, and upgrades the power control gain register, and the formation content is upgraded in first in first out.
In the embodiment shown in Figure 2, can come to determine major parameter by the following method:
1) M: power control record queue length.This value determine to be greater than the TPC quantity that equals to judge the channel quality downward trend.Choosing of this value can not be too big, and too greatly then power control convergence deficiency may be lost connection, then changes too fastly too for a short time, can make amendment suggested range [4,10] as required.
2) M/2: reference record length, round numbers are judged in the gain that declines deeply.
3) A: gain coefficient deeply declines.Be preset as 20% in the simulation study, can make amendment according to demand.This value is big more strong more to the adaptive capacity that declines deeply, but shake correspondingly can increase.
4) ThMax: power control threshold value, but the power summation of lifting in the observing time of power control gain register section, the excessive interference that then neighbor cell is produced that this value is provided with is bigger, the too little effect that can not play the power control convergence again, it and observation window length have direct contact, recommended range: M～3M dB.
Judgement and calculating by step S200～step S210, in the channel of decline significantly, the descending DPCH of following channel transmitting power is being no more than under the condition of maximum transmission power, can increase the amplitude of power control fast, shorten the time of power control convergence, realized the self adaptation power control ability under the deep fade environment, and can excessively not increase horsepower output, guarantee can not destroy the operate as normal of neighbor cell, increased the adaptability of TD-SCDMA system power control.
Because up-downgoing DPCH channel constitutes the closed-loop power control system mutually, and the said method in the present embodiment only needs one section memory space to preserve corresponding TPC power control commands word, and carry out less operand and get final product work, therefore, same process also is applicable to the wireless channel with TPC power control mechanism that other distribute in pairs.This algorithm can use equally at mobile station side, then can realize the anti-performance that declines deeply of up channel, if use the said method of the embodiment of the invention simultaneously at network terminal and portable terminal, set up the ability that its up-downgoing channel resists deep fade jointly, effect is with even more ideal.
The present invention also provides a kind of device of power control, and it can implement the method for above-mentioned power control.Fig. 3 is the structural representation according to the device of the power control of the embodiment of the invention, as shown in Figure 3, the device of controlling according to the power of the embodiment of the invention comprises: unit 302 is set, is used for according to current fading channel state and previous power adjustment step-length current power adjustment step-length being set; Control unit 304 is used to use described current power to adjust step-length and carries out the control of transmitting power.
In the prior art, fixed step size is adopted in power control, thereby causes the convergence deficiency in the channel faster declining, and causes the problem of the deterioration of communication quality.Review the embodiment of the invention, according to current fading channel state and previous power adjustment step-length current power adjustment step-length is set, make current power adjustment step-length and current fading channel state adapt, thereby can correct the transmitting power that is in antenna under the deep fade environment apace.
Preferably, the described unit 302 that is provided with comprises: module 3021 is set, is used for described current power and adjusts the absolute value that step-length is set to adjust greater than described previous power step-length, perhaps, described current power is adjusted step-length and is set to 0.
By the above-mentioned unit 302 that is provided with, make transmitting power to come dynamic change, thereby make power control convergence fast according to the reduction of speed rate that declines of channel, guaranteed communication quality.
Preferably, the described module 3021 that is provided with comprises: first is provided with submodule, be used for described current power and adjust step-length and be set to the integral multiple that previous power is adjusted the absolute value of step-length, preferred, current power is adjusted step-length and is set to 2 times of absolute value that previous power is adjusted step-length; Second is provided with submodule, be used for described current power adjust step-length be set to described previous power adjust step-length absolute value (1+A%) doubly, wherein, 0＜A＜50.
Preferably, the above-mentioned unit 302 that is provided with comprises: judge module 3022, be used for when described current fading channel state is the depth attenuation, judge nearest M/2 described previous power adjustment step-length (promptly, the M/2 of Bao Cuning previous power is adjusted step-length at last) whether all be not more than 0, wherein, preserve nearest M described previous power in advance and adjust step-length, M is a natural number; Processing module 3023 is used for all being not more than at 0 o'clock, and described current power is adjusted the absolute value that step-length is set to adjust greater than described previous power step-length.
Preferably, the device of above-mentioned power control also comprises: judging unit 306, described judging unit are used for judging described current fading channel state by following steps:
1) if it is that calibration power is adjusted step-length that described current power is adjusted step-length M before described previous power adjustment step-length, then described current channel is depth attenuation's state, and wherein, M is a natural number, and described calibration power is adjusted step-length greater than 0;
2) if described current power adjust M described previous power before the step-length adjust step-length be calibration power adjust discreet value that step-length and described current power adjusts step-length greater than 0 and preceding M/2 described previous power adjusting in the step-length of described M described previous power adjust step-length (promptly, the M/2 of Bao Cuning previous power is adjusted step-length at last) be under described depth attenuation's state or the adjustment of the power under described depth attenuation's gain-state step-length, then described current channel is depth attenuation's gain-state;
3) adjust step-length all less than 0 if described current power is adjusted a step-length M before described previous power, then described current channel is conventional state.
Fig. 4 is the software function schematic diagram according to the device of the power control of the embodiment of the invention.The software function of the device of this power control comprises:
1) receiver module 402, are used to obtain the TPC power control commands word from communication counterpart;
2) update module 404, be used to upgrade the power control gain register, owing to be provided with the spatial cache of a M floating-point length at receiving terminal, so nearest M TPC or power control gain (the power control algorithm output valve of present embodiment, this value will be replaced former TPC record) all will note, whenever a new record appearance, this data structure is all upgraded its member by the mode first in first out of formation;
3) judge module 406, when being used for the pattern judgement network operation, are initialized as normal mode, according to the choice criteria of power control gain recording in conjunction with each pattern, judge the environmental pattern of current channel and the update mode of status register;
4) control module 408, are used for rising soon to delay falling control, determine the power control amount of gain under the different mode.If the SIR of channel can not reach the minimum desired value of network side, the error rate can increase even lose link, and after surpassing certain degree, will produce interference.So, in a single day under the pattern that declines deeply, reached the expectation sir target, just no longer increase the power control amount of gain, the power that exceeds is guaranteeing slowly downward modulation on the basis that link is not lost.
5) suppress module 410, power suppresses module, and too much bring to power will increase the interference of neighbor cell.
6) output module 412, are used for after having determined the power control amount of gain, and the output transmitting power is to the antenna end of channel, and the record on the renewal power control gain formation relevant position.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the method for a power control is characterized in that, comprising:
According to current fading channel state and previous power adjustment step-length current power adjustment step-length is set;
Use described current power to adjust step-length and carry out the control of transmitting power.
2. method according to claim 1 is characterized in that, adjusts step-length according to current fading channel state and previous power and current power is set adjusts step-length and comprise:
Described current power is adjusted the absolute value that step-length is set to adjust greater than described previous power step-length; Perhaps
Described current power is adjusted step-length and is set to 0.
3. method according to claim 2 is characterized in that, when described current channel was deep fading's state, described current power was adjusted step-length and is set to comprise greater than the absolute value length that described previous power is adjusted step-length:
Described current power is adjusted step-length and is set to the integral multiple that previous power is adjusted the absolute value of step-length.
4. according to claim 2 or 3 described methods, it is characterized in that, at described current channel is deep fading's state, and it is described depth attenuation's state under or the power under described depth attenuation's gain-state when adjusting step-length that the described previous power that described current power is adjusted the predetermined quantity before the step-length is adjusted step-length, and described current power is adjusted step-length and is set to comprise greater than the absolute value of described previous power adjustment step-length:
Described current power adjust step-length be set to described previous power adjust step-length absolute value (1+A%) doubly, wherein, 0＜A＜50.
5. method according to claim 1 is characterized in that, adjusts step-length according to current fading channel state and previous power and current power is set adjusts step-length and comprise:
When described current channel is depth attenuation's state, judge whether nearest M/2 described previous power adjustment step-length all is not more than 0, wherein, preserves nearest M described previous power in advance and adjusts step-length, and M is a natural number;
If all be not more than 0, then described current power is adjusted the absolute value that step-length is set to adjust greater than described previous power step-length.
6. method according to claim 1 is characterized in that, judges described current fading channel state by following steps:
If M before described previous power adjustment step-length of described current power adjustment step-length is calibration power and adjusts step-length, then described current channel is depth attenuation's state, and wherein, M is a natural number, and described calibration power adjustment step-length is greater than 0;
If described current power adjust M described previous power before the step-length adjust step-length be described calibration power adjust discreet value that step-length and described current power adjusts step-length greater than 0 and described M described previous power adjust preceding M/2 described previous power in the step-length to adjust step-length be described depth attenuation's state under or the adjustment of the power under described depth attenuation's gain-state step-length, then described current channel is depth attenuation's gain-state;
If M the described previous power that described current power is adjusted before the step-length is adjusted step-length all less than 0, then described current channel is conventional state.
7. according to claim 5 or 6 described methods, it is characterized in that described M is more than or equal to the number of judging the power adjustment step-length that the channel quality downward trend is required.
8. method according to claim 1 is characterized in that, uses described current power adjustment step-length to carry out power control and comprises:
Adjust the step size computation current transmit power according to described current power;
Judge that whether described current transmit power is greater than the power control threshold value;
If greater than, then stop to increase transmitted power.
9. method according to claim 1 is characterized in that, portable terminal and/or network equipment are carried out the method for described power control.
10. the device of a power control is characterized in that, comprising:
The unit is set, is used for current power adjustment step-length being set according to current fading channel state and previous power adjustment step-length;
Control unit is used to use described current power to adjust step-length and carries out the control of transmitting power.
11. device according to claim 10 is characterized in that, the described unit that is provided with comprises:
Module is set, is used for described current power and adjusts the absolute value that step-length is set to adjust greater than described previous power step-length, perhaps, described current power is adjusted step-length and is set to 0.
12. device according to claim 11 is characterized in that, the described module that is provided with comprises:
First is provided with submodule, is used for described current power and adjusts the integral multiple that step-length is set to the absolute value of previous power adjustment step-length;
Second is provided with submodule, be used for described current power adjust step-length be set to described previous power adjust step-length absolute value (1+A%) doubly, wherein, 0＜A＜50.
13. device according to claim 10 is characterized in that, the described unit that is provided with comprises:
Judge module is used for when described current fading channel state is the depth attenuation, judges whether nearest M/2 described previous power adjustment step-length all is not more than 0, wherein, preserves nearest M described previous power in advance and adjusts step-length, and M is a natural number;
Processing module is used for all being not more than at 0 o'clock, and described current power is adjusted the absolute value that step-length is set to adjust greater than described previous power step-length.
14. device according to claim 10 is characterized in that, also comprises: judging unit, described judging unit are used for judging described current fading channel state by following steps:
If M the described previous power adjustment step-length that described current power is adjusted before the step-length is that calibration power is adjusted step-length, then described current channel is depth attenuation's state, and wherein, M is a natural number, and described calibration power is adjusted step-length greater than 0;
If described current power adjust M described previous power before the step-length adjust step-length be calibration power adjust discreet value that step-length and described current power adjusts step-length greater than 0 and described M described previous power adjust preceding M/2 described previous power in the step-length to adjust step-length be described depth attenuation's state under or the adjustment of the power under described depth attenuation's gain-state step-length, then described current channel is depth attenuation's gain-state;
If M the described previous power that described current power is adjusted before the step-length is adjusted step-length all less than 0, then described current channel is conventional state.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010203105.9A CN102281618B (en) | 2010-06-08 | 2010-06-08 | Method and device for power control |
| PCT/CN2010/077793 WO2011153765A1 (en) | 2010-06-08 | 2010-10-15 | Method and device for power control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010203105.9A CN102281618B (en) | 2010-06-08 | 2010-06-08 | Method and device for power control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102281618A true CN102281618A (en) | 2011-12-14 |
| CN102281618B CN102281618B (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010203105.9A Expired - Fee Related CN102281618B (en) | 2010-06-08 | 2010-06-08 | Method and device for power control |
Country Status (2)
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|---|---|
| CN (1) | CN102281618B (en) |
| WO (1) | WO2011153765A1 (en) |
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| WO2013143386A1 (en) * | 2012-03-30 | 2013-10-03 | 华为技术有限公司 | Method and network device for controlling uplink power of user equipment in heterogeneous network |
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| CN108205130A (en) * | 2017-12-22 | 2018-06-26 | 重庆物奇科技有限公司 | The control method of the transmission power of depth transducer, detection system and sensor |
| CN116981040A (en) * | 2023-09-25 | 2023-10-31 | 杭州炬华科技股份有限公司 | Power allocation method, device and medium for dual-mode communication system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013143386A1 (en) * | 2012-03-30 | 2013-10-03 | 华为技术有限公司 | Method and network device for controlling uplink power of user equipment in heterogeneous network |
| CN103369653A (en) * | 2012-03-30 | 2013-10-23 | 华为技术有限公司 | A user equipment uplink power control method and a network device in a heterogeneous network |
| CN103369653B (en) * | 2012-03-30 | 2016-03-30 | 华为技术有限公司 | The ascending power control method of subscriber equipment and the network equipment in heterogeneous network |
| WO2015139182A1 (en) * | 2014-03-17 | 2015-09-24 | 华为技术有限公司 | Ue, network side device, power adjustment method, and sg determination method |
| CN104469921A (en) * | 2014-12-04 | 2015-03-25 | 杭州敦崇科技股份有限公司 | Wireless packet-by-packet power control method and device |
| CN104469921B (en) * | 2014-12-04 | 2017-10-10 | 杭州敦崇科技股份有限公司 | Wireless packet-by-packet Poewr control method and device |
| CN108205130A (en) * | 2017-12-22 | 2018-06-26 | 重庆物奇科技有限公司 | The control method of the transmission power of depth transducer, detection system and sensor |
| CN108205130B (en) * | 2017-12-22 | 2021-11-30 | 重庆物奇科技有限公司 | Depth sensor, detection system and method for controlling transmitting power of sensor |
| CN116981040A (en) * | 2023-09-25 | 2023-10-31 | 杭州炬华科技股份有限公司 | Power allocation method, device and medium for dual-mode communication system |
| CN116981040B (en) * | 2023-09-25 | 2024-02-09 | 杭州炬华科技股份有限公司 | Power allocation method, device and medium for dual-mode communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102281618B (en) | 2014-11-05 |
| WO2011153765A1 (en) | 2011-12-15 |
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