CN1157861C - Method and device for controlling emission power of forward link in mobile communication system - Google Patents
Method and device for controlling emission power of forward link in mobile communication system Download PDFInfo
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- CN1157861C CN1157861C CNB001313541A CN00131354A CN1157861C CN 1157861 C CN1157861 C CN 1157861C CN B001313541 A CNB001313541 A CN B001313541A CN 00131354 A CN00131354 A CN 00131354A CN 1157861 C CN1157861 C CN 1157861C
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Abstract
The present invention relates to a method and a device for controlling the transmitting power of a forward link in a mobile communication system. On the basis of the power control of the forward link of an erasing indicating bit, the gain step length of a forward service channel with variable amplitudes and the structure of a novel frame selector are introduced to commonly act on the transmitting power control of the forward link; the change of the channels can be quickly tracked; a target error frame rate is satisfied, and simultaneously, the forward transmitting power can be effectively reduced.
Description
The present invention relates to emission power of forward link control technology field in the 3-G (Generation Three mobile communication system), especially based on the emission power of forward link control of wiping indicating bit (EIB).
In code division multiple access (CDMA) system, it is crucial satisfying the QoS of customer requirement and improving power system capacity, and this is realized by power control.Power control comprises power of reverse link control and forward link power control, so-called power of reverse link control is meant that travelling carriage and base station cooperate, reasonably control is by the transmitting power of the mobile you of travelling carriage when the base station transmits, make under the prerequisite that satisfies the reverse link signal quality requirement, travelling carriage is launched and the process link load, the final power that receives in the base station is equal as far as possible, and the transmitting power of travelling carriage is minimum as far as possible simultaneously; And forward link power control is meant that travelling carriage and base station cooperate, and reasonably control makes that by the transmitting power of the base station end of base station when travelling carriage transmits the transmitting power of base station is as much as possible little under the prerequisite that satisfies the forward link signal quality requirement.Because the forward business in the 3-G (Generation Three mobile communication system) increases considerably, forward link power control has become one of most important parts in the 3-G (Generation Three mobile communication system), the target of forward power control is rationally to adjust forward emitting power to guarantee the operation quality requirement of customer requirements, simultaneously on satisfy under the prerequisite of a bit, effectively reduce forward emitting power to reduce many base stations, multichannel soft noise jamming to user traffic channel.At the forward link power control period, for a travelling carriage at cell edge, the base station must be carried out the signal transmission in this base station with a bigger power on the Traffic Channel of this travelling carriage, could guarantee the desired service quality level of this travelling carriage, promptly so-called " dead angle phenomenon "; On the other hand, this base station becomes the interference signal of other travelling carriage received signals again to the signal power of this travelling carriage, for quality of service requirement and the certain power system capacity of assurance that guarantees other travelling carriages, the base station should be implemented to the signal transmission of this travelling carriage again with the little power emission of trying one's best.
Forward link power control in general cdma system is by each travelling carriage and base station transmits receiving system, and a frame selector that provides in the base station controller is carried out.
3GPP2 is organized in the CDMA2000 standard and provides three kinds of adoptable modes for forward link power control, be the forward link fast closed-loop power control of per second 800 times, per second can reach 50 times forward link and wipe the control of indicating bit (EIB) power, and the forward link power control based on measurement report of compatible IS-95.The present invention is primarily aimed at the conception based on the preceding paragraph link power control method proposition oneself of EIB.
Below the general step of controlling based on the forward link power of EIB is described:
Travelling carriage receives a forward frame from the base station, judges that this frame has been frame or bad frame, postpone two frames after, judged result is wiped indicating bit (EIB) with one is filled in the reverse frames that the next one is sent to above-mentioned base station.Above-mentioned base station receives the signal from above-mentioned travelling carriage, with signal decoding and recover traffic frame, upload to the frame selector of above-mentioned base station, EIB in the reverse frames that the frame selector of above-mentioned base station receives according to above-mentioned base station under the EIB power control mode increases or reduces the channel gain of forward service link, and the result is handed down to above-mentioned base station transmits receiving system then, the base station transmits receiving system is carried out the signal transmission in above-mentioned base station with corresponding transmission power according to above-mentioned forward traffic channel gain on the Traffic Channel of above-mentioned travelling carriage.
The frame selector that forward link power control based on EIB involved in the present invention is meant base station controller is after receiving EIB, and increase still reduces and the strategy and the method for corresponding adjusting range how to decide forward traffic channel to gain according to EIB.Existing forward link power control algolithm based on EIB mainly contains U.S. Pat 5893035.This algorithm utilizes a timer in the frame selector that the control time-delay is estimated that arthmetic statement is as follows:
Travelling carriage receives the forward frame from the base station, if forward frame has been a frame, then EIB puts 0, otherwise puts 1.After postponing two frames, EIB filled out in reverse frames of people be sent to above-mentioned base station.Decoding after receiving and being sent to link signal in the base station, and is reported to base station controller, and the frame selector of base station controller extracts EIB from the reverse frames that the base station reports;
If EIB=0 then checks timer,, timer reduces forward traffic channel gain Ud1 if being 0; Otherwise reduce forward traffic channel gain Ud2, timer subtracts one simultaneously.
If EIB=1 then checks timer,, then increase forward traffic channel gain U if timer is 0; Otherwise the forward traffic channel gain is constant, and timer subtracts one simultaneously.
The base station transmits receiving system is carried out fl transmission according to current power is on duty with the performance number behind the current channel gain.
U wherein, Ud1, Ud2 is set by the configuration list of base station controller, and U＞Ud2＞Ud1, Ud1=[U-3Ud2 are arranged]/96, to satisfy 1% target frame error rate.
In the control method of above-mentioned emission power of forward link, can't follow the tracks of the quick variation of channel quality, when channel quality worsens suddenly or improves suddenly, this algorithm can't make forward power reach optimum state rapidly, especially dumb on step-length is adjusted, in order to guarantee that target frame error rate need consume bigger forward power, so its efficiency of algorithm is not high.
In view of this, the object of the present invention is to provide the method and the device of the emission power of forward link control in a kind of mobile communication system, to come the control of acting in conjunction emission power of forward link by forward service link channel gain step-length and the new frame selector of introducing variable amplitude, when satisfying target frame error rate, can reduce emission power of forward link effectively, thereby under the prerequisite that requires that guarantees QoS of customer, improve the forward-link capacity of system.
The present invention seeks to realize like this:
Be applied to the method for transmitting power control in forward direction key road in the mobile communication system, its characteristics are may further comprise the steps: (1) travelling carriage receives the forward frame from the base station, determines to wipe indicating bit and sends to the base station according to forward direction indication frame; (2) value of the EIB that reports according to the base station of base station system device is adjusted the forward traffic channel yield value; (3) base station transmits receiving system 102 is carried out fl transmission according to current power is on duty with the performance number after the adjusted forward traffic channel gain.
Control method one, aforesaid forward link power control method is characterized in that may further comprise the steps:
When travelling carriage receives forward frame from the base station,, then wipe indicating positions 0, otherwise put 1 if forward frame has been a frame.After postponing two frames, will wipe indicating bit and insert in the reverse frames and be sent to above-mentioned base station.Decoding after receiving forward link signal in the base station, and is reported to base station controller, and the frame selector of base station controller extracts EIB from the reverse frames that the base station reports;
If EIB=1, then check timer, if timer is 0, then forward traffic channel being gained increases (the M+K1)/K2 of step-length increase unit gain increase step-length doubly, the forward traffic channel gain that forward traffic channel gain simultaneously increases after the variation increases step-length, and timer is put N; EIB=1 else if, and timer is not 0, then the forward traffic channel gain is constant, and timer subtracts one; If EIB=1, in any case, with counter zero setting.
If EIB=0, then forward traffic channel gain being reduced step-length reduces unit gain and reduces step-length | K3-M|/K3 doubly, the forward traffic channel gain that the forward traffic channel gain is reduced after the variation reduces step-length, checks simultaneously whether timer is zero, if non-vanishing, then timer subtracts one; If EIB=0 is in any case counter adds one;
The base station transmits receiving system is carried out fl transmission according to current power is on duty with the performance number behind the current channel gain.
Wherein, it is Uup that the forward traffic channel gain increases the unit step-length, and it is Udown that the forward traffic channel gain reduces the unit step-length, and the counter initial value is 100, and the timer initial value is 0; M is that EIB that the frame selector of base station controller utilizes counter to add up to receive continuously is 0 number, utilizes the time-delay of timer tracking Control simultaneously, and timer regularly be N, and wherein N is the control of the estimating frame number of delaying time; Among this, Uup, Udown, K1, K2 and K3 are set by the configuration list of base station controller regulation, require Uup＞Udown, and Uup than big two orders of magnitude of Udown to guarantee 1% frame error rate.K1, K2, K3 satisfies the twice that K2 is about K1 simultaneously for the fine setting parameter, and K3 and K1 are more or less the same, and can consider in 100 left and right sides values.Its regulation rule is as follows:
It is big that K1 becomes, and then the forward traffic channel gain increases the step-length raising, easily satisfies target frame error rate, but average forward emitting power becomes big; Vice versa.
It is big that K2 becomes, and then forward traffic channel gain increase step-length reduces, and easily reduce average forward emitting power, but frame error rate can become big; Vice versa.
It is big that K3 becomes, and then the forward traffic channel gain reduces step-length and diminishes, and easily satisfy target frame error rate, but average forward emitting power becomes big; Vice versa.But there is not the K1 effect obvious.
Rationally adjust K1, K2 and K3 can obtain satisfied target frame error rate and average forward emitting power.
Control method two, a kind of forward link power control method, its characteristics also are may further comprise the steps:
When travelling carriage receives forward frame from the base station,, then wipe indicating positions 0, otherwise put 1 if forward frame has been a frame.After postponing two frames, will wipe indicating bit and insert in the reverse frames and be sent to above-mentioned base station.Decoding after receiving and being sent to link signal in the base station, and is reported to base station controller, and the frame selector of base station controller extracts EIB from the reverse frames that the base station reports;
If EIB=1 then checks timer, if timer is zero, then forward traffic channel being gained increases the 1/BF of step-length increase forward traffic channel gain unit step-length doubly, and the while timer is put N; EIB=1 else if, and timer is not 0, it is constant that then the forward traffic channel gain increases step-length, and timer subtracts 1 simultaneously.
If EIB=0 then checks timer, be zero as if timer, then forward traffic channel gain minimizing step-length is reduced 1/2^ (K+BF) times of forward traffic channel gain unit step-length; EIB=0 else if, and timer is not 0 then reduces the forward traffic channel gain 1/2^ (K-4) that step-length reduces forward traffic channel gain unit step-length doubly, and timer subtracts one simultaneously.
The base station transmits receiving system is carried out fl transmission according to current power is on duty with the performance number behind the current channel gain.
Wherein, this EIB deposits in the register by queue sequence, and the earliest EIB record of deletion, and adding up in the current register (Register) is 1 EIB number, is designated as BF.
Wherein, forward traffic channel gain unit step-length is U, and the Register initial value is 0, and the Timer initial value is 0;
Wherein, U and K are set by the base station controller configuration list, require K＞6, to guarantee 1% frame error rate.K is the fine setting parameter, and its regulation rule is as follows:
It is big that K becomes, and then the forward traffic channel gain reduces the step-length reduction, easily satisfies target frame error rate, but average forward emitting power becomes big; Vice versa.
It is big that U becomes, and then the forward traffic channel gain increases step-length and becomes big, easily satisfy target frame error rate, but average forward emitting power becomes big; Vice versa.
A kind of device that is applied to control emission power of forward link control in the mobile communication system, it comprises travelling carriage, the transmission receiving system of base station, frame selector in the base station controller, travelling carriage receives to be judged from signal of base station, feed back signal to this base station transmits receiving system, the reverse frames that the base station transmits receiving system obtains signal decoding, upload to the frame selector of base station controller, the frame selector is behind the channel gain that changes forward service link, the result is handed down to the base station transmits receiving system, and the base station transmits receiving system is carried out the signal transmission in above-mentioned base station transmits receiving system according to above-mentioned channel gain on the Traffic Channel of above-mentioned travelling carriage; It is characterized in that: described frame selector comprises an EIB extraction unit, a counter, a timer and a power decision unit, wherein, behind the above-mentioned reverse frames incoming frame selector, at first is sent to the EIB extraction unit.The EIB extraction unit is exported reverse frames after treatment; The EIB position that output simultaneously obtains; The EIB position of this output is input to the counter in the above-mentioned frame selector, timer and power decision unit; Behind this EIB position enter counter, handle through counter, the output count value is to the power decision unit; Behind the above-mentioned EIB position incoming timing device, through timer processing, the output timing value is to power control unit; Behind above-mentioned EIB position, count value and the timing value input power decision unit, the power decision unit is handled input under control method one control, and the power output adjusted value carries out the signal transmission to the base station transmits receiving system;
A kind of device that is applied to control emission power of forward link control in the mobile communication system, it comprises travelling carriage, the transmission receiving system of base station, frame selector in the base station controller, travelling carriage receives to be judged from signal of base station, feed back signal to this base station transmits receiving system, the reverse frames that the base station transmits receiving system obtains signal decoding, upload to the frame selector of base station controller, the frame selector is behind the channel gain that changes forward service link, the result is handed down to the base station transmits receiving system, and the base station transmits receiving system is carried out the signal transmission in above-mentioned base station transmits receiving system according to above-mentioned channel gain on the Traffic Channel of above-mentioned travelling carriage; It is characterized in that: described frame selector comprises an EIB extraction unit, a counter, a timer and a power decision unit, wherein, behind the above-mentioned reverse frames incoming frame selector, at first is sent to the EIB extraction unit.The EIB extraction unit is exported reverse frames after treatment; The EIB position that output simultaneously obtains; The EIB position of this output is input to the register in the above-mentioned frame selector, timer and power decision unit; After the EIB position of this output was input to register, through register processings of reordering, the output ranking results after the counter processing, was exported count value to counter; Behind this above-mentioned EIB position incoming timing device, through timer processing, the output timing value is to power control unit; Behind above-mentioned EIB position, count value and the timing value input power decision unit, the power decision unit is handled input under control method two controls, and the power output adjusted value carries out the signal transmission to the base station transmits receiving system;
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is the system block diagram of emission power of forward link control in the mobile communication system;
Fig. 2 is control method one flow chart of the present invention;
Fig. 3 is the structure chart of first kind of frame selector of the present invention;
Fig. 4 is control method two flow charts of the present invention;
Fig. 5 is the structure chart of second kind of frame selector of the present invention;
Fig. 6 is control method one of the present invention and patent US5893035 emulation comparison diagram;
Fig. 7 is control method two of the present invention and patent US5893035 emulation comparison diagram;
As shown in Figure 1, the forward frame that travelling carriage 101 receives from base station transmits receiving system 102, judge that this frame has been frame or bad frame, postpone two frames after, judged result is wiped indicating bit (EIB) with one is filled in the reverse frames that the next one is sent to base station transmits receiving system 102.Base station transmits receiving system 102 receives the signal from travelling carriage 101, with signal decoding and recover traffic frame, upload to the frame selector 100 in the base station controller 103, the frame selector 100 of base station controller 103 increases or reduces the channel gain of forward service link according to the EIB in the above-mentioned reverse frames that receives under the EIB power control mode, and the result is handed down to base station transmits receiving system 102, then, base station transmits receiving system 102 is carried out the signal transmission in base station transmits receiving system 102 with corresponding transmission power according to above-mentioned forward traffic channel gain on the Traffic Channel of travelling carriage 101.
Wherein, as shown in Figure 2, comprise an EIB extraction unit 104, counter 105, a timer 106 and a power decision unit 107 at frame selector 100; Behind above-mentioned reverse frames incoming frame selector 100, at first be sent to EIB extraction unit 104.EIB extraction unit 104 is exported reverse frames after treatment; The EIB position that output simultaneously obtains; The EIB position of this output is input to the counter 105 in the frame selector 100, timer 106 and power decision unit 107; Behind this EIB position enter counter 105, handle through counter 105, the output count value is to power decision unit 107; Behind the above-mentioned EIB position incoming timing device 106, handle through timer 106, the output timing value is to power control unit 107; Behind above-mentioned EIB position, count value and the timing value input power decision unit 107,107 pairs of inputs of power decision unit are handled, and the power output adjusted value.
When the forward frame that travelling carriage 101 receives from base station transmits receiving system 102, if forward frame has been a frame, then EIB puts 0, otherwise puts 1.After postponing two frames, EIB inserted in the reverse frames be sent to base station transmits receiving system 102.This receiving system 102 is decoded after receiving and being sent to link signal, and is reported to base station controller 103, and the frame selector 100 of base station controller 103 extracts EIB from the reverse frames that base station controller 103 reports; Also comprise the steps then, please refer to Fig. 4:
(1) if EIB=1, then check timer 106,, then the forward traffic channel gain is increased step-length and increase Uup* (M+K1)/K2 if timer 106 is 0, the forward traffic channel gain that forward traffic channel gain simultaneously increases after the variation increases step-length, and timer 106 is put N; EIB=1 else if, and timer 106 is not 0, then the forward traffic channel gain is constant, and timer 106 subtracts one; If EIB=1, in any case, with counter 105 zero setting.
(2) if EIB=0, then the forward traffic channel gain is reduced step-length and reduce Udown*|K3-M|/K3, the forward traffic channel gain after variation of forward traffic channel gain minimizing is reduced step-length, check simultaneously whether timer is zero, if non-vanishing, then timer subtracts one; If EIB=0 is in any case counter adds one;
Base station transmits receiving system 102 is carried out fl transmission according to current power is on duty with the performance number behind the current channel gain.
Wherein forward traffic channel gain increase unit step-length is Uup, and it is Udown that the forward traffic channel gain reduces the unit step-length, and counter 105 initial values are 100, and timer 106 initial values are 0;
Wherein M is that the EIB that the frame selector 100 of base station controller 103 utilizes counter 105 to add up to receive continuously is 0 number, utilizes the time-delay of timer 106 tracking Control simultaneously, and timer 106 be N regularly, and wherein N is the control of the estimating frame number of delaying time;
Wherein, Uup, Udown, K1, K2 and K3 are set by EIB, require Uup＞Udown, and Uup than big two orders of magnitude of Udown to guarantee 1% frame error rate.K1, K2, K3 satisfies the twice that K2 is about K1 simultaneously for the fine setting parameter, and K3 and K1 are more or less the same, and can consider near value 100.Its regulation rule is as follows:
It is big that K1 becomes, and then the forward traffic channel gain increases the step-length raising, easily satisfies target frame error rate, but average forward emitting power becomes big; Vice versa.
It is big that K2 becomes, and then forward traffic channel gain increase step-length reduces, and easily reduce average forward emitting power, but frame error rate can become big; Vice versa.
It is big that K3 becomes, and then the forward traffic channel gain reduces step-length and diminishes, and easily satisfy target frame error rate, but average forward emitting power becomes big; Vice versa.But there is not the K1 effect obvious.
Rationally adjust K1, K2 and K3 can obtain satisfied target frame error rate and average forward emitting power.
(3), base station transmits receiving system 102 is carried out fl transmission according to current power is on duty with the performance number behind the current channel gain.
The method effectively reduces emission power of forward link under the condition that guarantees target frame error rate.Itself and patent US5893035 simulation result are to such as Fig. 6.Wherein left side figure is the power (Power, the picture left above) and the time dependent emulation of frame error rate (FER, lower-left figure) of US5893035 patent algorithm; Right figure is the power (Power, top right plot) and the time dependent emulation of frame error rate (FER, bottom-right graph) of this patent algorithm, and wherein the unit of power is a milliwatt.The system parameters of emulation is identical, and is as follows:
Channel width 1.25MHz;
Data service rate 19.2Kbps;
Data frame length 20ms;
Coding gain 5.48dB;
Radius of society 1000m;
Background noise 8e-17mW/Hz;
Shadow fading 5dB;
Target frame error rate 1%;
Initial Trans 1000mW;
Be the another kind of mode that realizes the object of the invention below: as shown in Figure 1, the forward frame that travelling carriage 101 receives from base station transmits receiving system 102, judge that this frame has been frame or bad frame, after postponing two frames, judged result is wiped indicating bit (EIB) with one be filled in the reverse frames that the next one is sent to base station transmits receiving system 102.Base station transmits receiving system 102 receives the signal from travelling carriage 101, with signal decoding and recover traffic frame, upload to the frame selector 100 in the base station controller 103, the frame selector 100 of base station controller 103 increases or reduces the channel gain of forward service link according to the EIB in the above-mentioned reverse frames that receives under the EIB power control mode, and the result is handed down to base station transmits receiving system 102, then, base station transmits receiving system 102 is carried out the signal transmission in base station transmits receiving system 102 with corresponding transmission power according to above-mentioned forward traffic channel gain on the Traffic Channel of travelling carriage 101.
Wherein, see also Fig. 5, aforesaid frame selector also comprises an EIB extraction unit 104, register 108, counter 105, a timer 106 and a power decision unit 107, wherein, behind the above-mentioned reverse frames incoming frame selector 100, at first be sent to EIB extraction unit 104, EIB extraction unit 104 is exported reverse frames after treatment; The EIB position that output simultaneously obtains; The EIB position of this output is input to the register 108 in the frame selector 100, timer 106 and power decision unit 107; After the EIB position of this output was input to register 108, through its processing of reordering, the output ranking results after counter 105 processing, was exported count value to counter 105; Behind this above-mentioned EIB position incoming timing device 106, handle through timer 106, the output timing value is to power control unit 107; Behind above-mentioned EIB position, count value and the timing value input power decision unit 107, handle, and the power output adjusted value carries out the signal transmission to base station transmits receiving system 102 by 107 pairs of inputs of power decision unit;
See also Fig. 4, when travelling carriage receives forward frame from the base station,, then wipe indicating bit EIB and put 0, otherwise put 1 if forward frame has been a frame.After postponing two frames, EIB inserted in the reverse frames be sent to above-mentioned base station.Decoding after receiving and being sent to link signal in the base station, and is reported to base station controller, and the frame selector of base station controller extracts EIB from the reverse frames that the base station reports; Then this EIB is deposited in the register by queue sequence, and the earliest EIB record of deletion, adding up in the current register is 1 EIB number, is designated as BF.
If EIB=1 then checks timer 106, if timer 106 is zero, then the forward traffic channel gain is increased step-length and increase U/BF, timer 106 is put N simultaneously; EIB=1 else if, and timer 106 is not 0, it is constant that then the forward traffic channel gain increases step-length, and timer 106 subtracts 1 simultaneously.
If EIB=0 then checks timer 106,, then the forward traffic channel gain is reduced step-length and reduce U/2^ (K+BF) if timer 106 is zero; EIB=0 else if, and timer is not 0, then the forward traffic channel gain is reduced step-length and reduces U/2^ (K-4), timer 106 subtracts one simultaneously.
Base station transmits receiving system 102 is carried out fl transmission according to current power is on duty with the performance number behind the current channel gain.
Base station transmits receiving system 102 is carried out fl transmission according to current power is on duty with the performance number behind the current channel gain.
Wherein, forward traffic channel gain unit step-length is U, and register Register108 initial value is 0, and the Timer106 initial value is 0;
Wherein, U and K require K＞6 by base station controller inventory configuration settings, to guarantee 1% frame error rate.K is the fine setting parameter, and its regulation rule is as follows:
It is big that K becomes, and then the forward traffic channel gain reduces the step-length reduction, easily satisfies target frame error rate, but average forward emitting power becomes big; Vice versa.
It is big that U becomes, and then forward traffic channel increases step-length and becomes big, easily satisfies target frame error rate, but average forward emitting power becomes big; Vice versa.
Rationally adjust U and K and can obtain satisfied target frame error rate and average forward emitting power.
The method effectively reduces emission power of forward link under the condition that guarantees target frame error rate.Itself and patent US5893035 simulation result are to such as Fig. 7.The system parameters of emulation as mentioned before.Wherein left side figure is the power (Power, the picture left above) and the time dependent emulation of frame error rate (FER, lower-left figure) of Qualcomm's patent algorithm; Right figure is the power (Power, top right plot) and the time dependent emulation of frame error rate (FER, bottom-right graph) of this patent algorithm, and wherein the unit of power is a milliwatt.The system parameters of emulation as mentioned before.
The present invention is thus according to channel variation adaptively modifying channel gain adjusting range, and sufficient estimation has been carried out in the control time-delay, track channel change rapidly, the little emission power of forward link that reduced of can trying one's best again when satisfying frame error rate.
Claims (5)
1, a kind of method that is applied to emission power of forward link control in the mobile communication system, the forward link power control based on wiping indicating bit EIB is characterized in that may further comprise the steps:
(1) travelling carriage receives the forward frame from the base station, determines to wipe indicating bit and sends to the base station according to forward direction indication frame;
(2) value of the EIB that reports according to the base station of base station system device is adjusted the forward traffic channel yield value;
(3) base station transmits receiving system 102 is carried out fl transmission according to current power is on duty with the performance number after the adjusted forward traffic channel gain.
2, forward link power control method according to claim 1 is characterized in that the method for the described adjustment forward traffic channel of step (2) yield value is:
If EIB=1, then check timer,, then the forward traffic channel gain is increased step-length and increase (M+KI)/K2 Fu that unit gain increases step-length if timer is 0, the forward traffic channel gain that forward traffic channel gain simultaneously increases after the variation increases step-length, and timer is put N; EIB=1 else if, and timer is not 0, then the forward traffic channel gain is constant, and timer subtracts one; If EIB=1 is with counter zero setting;
If EIB=0, then forward traffic channel gain is reduced step-length and reduce IK3 one M1/K3 that unit gain reduces step-length doubly, the forward traffic channel gain that the forward traffic channel gain is reduced after the variation reduces step-length, checks simultaneously whether timer is zero, if non-vanishing, then timer subtracts one; If EIB=0, counter adds one;
Wherein, the counter initial value is 100, and the timer initial value is that 0:M is that EIB that the frame selector of base station controller utilizes counter to add up to receive continuously is 0 number, utilizes the time-delay of timer tracking Control simultaneously, timer regularly is N, wherein the control time-delay frame number of N for estimating; Among this, the forward traffic channel gain increases step-length UUp, and the forward traffic channel gain reduces step-length UdOWn, and K1, K2 and K3 are by the configuration list regulation of base station controller, require UUp＞down, and Uop than big two orders of magnitude of Udown to guarantee 1% frame error rate, K1, K2, K3 is the fine setting parameter, satisfy the twice that K2 is about K1 simultaneously, K3 and K1 are more or less the same, and its regulation rule is as follows:
It is big that K1 becomes, and then the forward traffic channel gain increases the step-length raising, easily satisfies target frame error rate, but average forward emitting power becomes big; Vice versa;
It is big that K2 becomes, and then forward traffic channel gain increase step-length reduces, and easily reduce average forward emitting power, but frame error rate can become big; Vice versa;
It is big that K3 becomes, and then forward business accomplishes that straight gain reduces step-length and diminishes, and easily satisfies target frame error rate, but average forward emitting power becomes big; Vice versa.
3, forward link power control method according to claim 1 is characterized in that the method for the described adjustment forward traffic channel of step (2) yield value is:
If EIB=1, then check timer, if timer is zero, the 1/BF of the unit step-length that then forward traffic channel gain increase step-length increase forward traffic channel gained doubly, simultaneously timer is put N, EIB=1 else if, and timer is not 0, then forward traffic channel gain increase step-length is constant, and timer subtracts 1 simultaneously;
If EIB=0 then checks timer, be zero as if timer, then forward traffic channel gain minimizing step-length is reduced 1/2^ (K+BF) times of forward traffic channel gain unit step-length; EIB=0 else if, and timer is not 0 then reduces the forward traffic channel gain 1/2^ (K-4) that step-length reduces forward traffic channel gain unit step-length doubly, subtracts one with timer;
Wherein, this EIB goes in the register by queue sequence, and the earliest EIN record of deletion, and adding up among the current register Rejister is 1 EIB number, is designated as BF;
Wherein, forward business believes that this gain unit's step-length is U, and the initial value of register is 0, and timer Timer initial value is 0;
Wherein, U and K are set by the base station controller configuration list, require K＞6, and to guarantee 1% frame error rate, K is the fine setting parameter, and its regulation rule is as follows:
It is big that K becomes, and then forward traffic channel gain configuration list reduces, and easily satisfies target frame error rate, but average forward emitting power becomes big; Vice versa;
It is big that U becomes, and then the forward traffic channel gain increases step-length and becomes big, easily satisfy target frame error rate, but average forward emitting power becomes big; Vice versa.
4, a kind of device that is applied to emission power of forward link control in the mobile communication system, it comprises travelling carriage, the transmission receiving system of base station, frame selector in the base station controller, travelling carriage receives to be judged from signal of base station, feed back signal to this base station transmits receiving system, the base station transmits receiving system obtains reverse frames with signal decoding, upload to the frame selector of base station controller, the frame selector is behind the channel gain that changes forward service link, the result is handed down to the base station transmits receiving system, and the base station transmits receiving system is carried out the signal transmission in above-mentioned base station transmits receiving system according to above-mentioned channel gain on the Traffic Channel of above-mentioned travelling carriage; It is characterized in that: described frame selector comprises an EIB extraction unit, a timer, a timer and a power decision unit, wherein, behind the above-mentioned reverse frames incoming frame selector, at first be sent to the EIB unit, the EIB extraction unit is exported reverse frames after treatment; The EIB position that output simultaneously obtains; The EIB position of this output is input to the counter in the above-mentioned frame selector, timer and power decision unit; Behind this EIB position enter counter, handle through counter, the output count value is to the power decision unit; Behind the above-mentioned EIB position incoming timing device, through timer processing, the output timing value is to power control unit; Behind the defeated people's power decision unit of above-mentioned EIB position, count value and timing value, the power decision unit is handled input, and the power output adjusted value carries out the signal transmission to the base station transmits receiving system.
5, a kind of device that is applied to emission power of forward link control in the mobile communication system, it comprises travelling carriage, the transmission receiving system of base station, frame selector in the base station controller, travelling carriage receives to be judged from signal of base station, feed back signal to this base station transmits receiving system, the reverse frames that the base station transmits receiving system obtains signal decoding, upload to the frame selector of base station controller, the frame selector is behind the channel gain that changes forward service link, the result is handed down to the base station transmits receiving system, and the base station transmits receiving system is carried out the signal transmission in above-mentioned base station transmits receiving system according to above-mentioned channel gain on the Traffic Channel of above-mentioned travelling carriage; It is characterized in that: described frame selector comprises an EIB extraction unit, a register, a counter, a timer and a power decision unit, wherein, behind the above-mentioned reverse frames incoming frame selector, at first be sent to the EIB extraction unit, the EIB extraction unit is exported reverse frames after treatment; The EIB position that output simultaneously obtains; The EIB position of this output is input to the register in the above-mentioned frame selector, timer and power decision unit; After the EIB position of this output was input to register, through register processings of reordering, the output ranking results after the counter processing, was exported count value to counter; Behind this above-mentioned EIB position incoming timing device, through timer processing, the output timing value is to power control unit; Behind above-mentioned EIB position, count value and the timing value input power decision unit, the power decision unit is handled input, and the power output adjusted value carries out the signal transmission to the base station transmits receiving system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001313541A CN1157861C (en) | 2000-11-02 | 2000-11-02 | Method and device for controlling emission power of forward link in mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001313541A CN1157861C (en) | 2000-11-02 | 2000-11-02 | Method and device for controlling emission power of forward link in mobile communication system |
Publications (2)
| Publication Number | Publication Date |
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| CN1353509A CN1353509A (en) | 2002-06-12 |
| CN1157861C true CN1157861C (en) | 2004-07-14 |
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| CNB001313541A Expired - Fee Related CN1157861C (en) | 2000-11-02 | 2000-11-02 | Method and device for controlling emission power of forward link in mobile communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004297231A (en) * | 2003-03-26 | 2004-10-21 | Nec Corp | Mobile communication system, radio base station apparatus and power control method used for them |
| US8428536B2 (en) * | 2008-11-25 | 2013-04-23 | Silicon Laboratories Inc. | Low-cost receiver using automatic gain control |
| CN101883414B (en) * | 2010-06-17 | 2014-04-09 | 中兴通讯股份有限公司 | Method and base station for reducing forward transmission power in group system |
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