CN1322767C - Power control method for mobile communication system - Google Patents
Power control method for mobile communication system Download PDFInfo
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- CN1322767C CN1322767C CNB031499082A CN03149908A CN1322767C CN 1322767 C CN1322767 C CN 1322767C CN B031499082 A CNB031499082 A CN B031499082A CN 03149908 A CN03149908 A CN 03149908A CN 1322767 C CN1322767 C CN 1322767C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention relates to a power control method for a mobile communication system, which is used for obtaining an optimal power control effect. The information of closed loop power control is used for triggering opened loop power control. Consequently, the present invention is the power control method of combining an opened loop and a closed loop. The method comprises: closed loop power control is implemented to the system, and the information of the closed loop power control is recorded; whether the same continuously recorded closed loop power control information exceeds a predetermined threshold value is judged by the system; if true, an opened loop power control process is triggered; then, the closed loop power control is returned, else, a closed loop power control process is continuously implemented. The same closed loop power control information comprises: the adjustment of increasing or reducing power is implemented to the closed loop power control by certain continuous times or the power range of the closed loop power control adjustment within a certain period of time, namely an increased or reduced power accumulated value exceeds a preset corresponding threshold value. For the TD-SCDMA system, signal intensity on a downstream pilot frequency time slot or P-CCPCH is measured by opened loop power control. Meanwhile, the dynamic range of the closed loop power control is given by the opened loop power control.
Description
Technical field
The present invention relates to a kind of mobile communication technology, relate to the Poewr control method in the mobile communication system or rather.
Background technology
In code division multiple access (CDMA) mobile communication system, power control is mainly used in and overcomes near-far interference, to reduce system interference and in order saving energy.Power control techniques is on the basis that the received signal energy of receiving terminal or signal to noise ratio index etc. are assessed, by compensate the signal fadeout in the wireless channel in good time and moderately, thereby both kept this user's communications quality, other user in the same Radio Resource is not produced unnecessary interference again, when guaranteeing power system capacity, keep communication quality.
In existing CDMA mobile communication system, power control can mainly be divided into exterior ring power control according to its control procedure, inner loop power control (exterior ring power control and inner loop power control can be referred to as closed power control again) and open Loop Power control mode.Traditional power control process is: at first adopt the open Loop Power control mode to set the Initial Trans of channel at the beginning of user link is set up, in communication process, carry out closed power control then, promptly, the transmitting power of uplink and downlink link is adjusted accordingly according to comparative result by the signal to noise ratio (SIR) of measurement and the signal to noise ratio (SIR) of goal-setting are compared.Simultaneously, system adds up the desired value of setting inner loop power control according to link-quality long the time in communication process, promptly adjust target SIR by exterior ring power control.
The exterior ring power control procedure is to provide the desired value of the SIR of Traffic Channel according to the qos requirement of miscellaneous service and residing mobile environment, and along with the variation of wireless environment, according to communication link quality is estimated, the sir target value is adjusted; Simultaneously by the sir target value is limited, avoid a lot of users owing to can not satisfy target signal to noise ratio and all raise transmitting power, finally cause the phenomenon of system crash.
The inner loop power control procedure is by the signal to noise ratio (SIR) of the Traffic Channel after base station and the travelling carriage detection demodulation after Radio Link is set up, compare with signal-to-noise target value (being SIR target) then, then send an instruction (TPC) that reduces transmitting power if measured value is higher than desired value; Otherwise, then send an instruction (TPC) that increases transmitting power.Base station and travelling carriage are received after the TPC order, raise or the downward modulation transmitting power according to default power control step-size.The advantage of this closed-loop control process is the control precision height, and the power adjustment that is in course of adjustment is the variation reposefully of gradual change, rather than unexpected, violent variation; Shortcoming is to carrying out this power control command that sends constantly certain time delay to be arranged from measuring moment point, and because the restriction of power control step-size and the influence of TPC error of transmission, make adjustment process that certain time delay and error also be arranged, particularly when big channel fading takes place, can not make fast and accurately and adjusting.The existence of these problems will cause the power control algorithm performance decrease.In sum, the main distinction of inner and outer rings power control is to adjust the asynchronism(-nization) that object is different and adjustment process takies, and the time that the external circule power control process takies obviously is longer than inner-loop power control.
Open Loop Power control is the channel fading situation to be estimated according to the signal quality that link receives by base station or travelling carriage, adjusts transmitting power then to offset channel fading.What open Loop Power control was taked is how many differences just mends the mode of what " settling at one go ", and this is the fundamental difference of controlling with closed power.The major advantage of open Loop Power control has been to reduce the processing delay of power control process, has reduced the complexity of power control algorithm; Shortcoming is that open Loop Power control changes greatly signal amplitude, must there be simultaneously channel estimation results more accurately could guarantee the validity of open loop power control, in addition, because the time variation of mobile environment and channel, only depend on the open loop power control accuracy of the control of guaranteed output surely that differs,, then can increase the measurement burden and the signaling traffic load of system again greatly if adopt open loop power control real-time, thereby in real system, the availability of its single use is not high.
Be that the requirement up link has consistent channel fading characteristic with down link effectively with the basis of open loop power control accurately, and in Frequency Division Duplexing (FDD) (FDD) mobile communication system, because the up-downgoing channel is operated in respectively on the different channels, can't accomplish accurate open Loop Power control, therefore open loop power control can only play the effect of thick control, power control mainly is to control by inner loop power fast to realize in the communication process, but the power control algorithm that determines power control cycle and step-length more complicated all.
Because the frame structure characteristics of Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) mobile communication system have determined the TD-SCDMA system can not adopt inner loop power control very fast, but, because it is time division duplex (TDD) mode, uplink downlink is in the different time-gap of same channel, this moment, the up-downgoing of channel was symmetrical substantially, and special frame structure is designed to the open loop power measurement that system has degree of precision assurance is provided, therefore, the open loop power control of TD-SCDMA system can reach quite high precision, and can adopt some unique Poewr control methods, make the complexity of system power control simplify greatly.
Summary of the invention
The objective of the invention is for mobile communication system designs a kind of Poewr control method, when obtaining the power control effect of optimizing, also can make the complexity of system power control simplify greatly.
The technical scheme that realizes the object of the invention is such: a kind of Poewr control method of mobile communication system is characterized in that comprising following treatment step:
A. system carries out closed power control, and the control information of record closed power;
B. system judges whether the identical closed power control information that recording occurring continuously arrives surpasses its default threshold value, is then to trigger the open Loop Power control process to return closed power control then, otherwise proceeds the closed power control procedure.
The closed power control information of being write down in the steps A comprise the adjustment number of times that increases continuously power that sent or that carried out that system detects, continuously reduce power the adjustment number of times, increase continuously the adjustment aggregate-value of power and reduce the adjustment aggregate-value of power continuously.
Described steps A, uplink closed loop order that the base station record has sent or the downlink closed-loop power control command of having carried out are the closed loop power control commands that increases power or reduce power; Described step B, judge that the uplink closed loop order send or carry out or downlink closed-loop power control command are that N continuous increases inferiorly that power control is adjusted or continuous N when reducing power inferiorly and controlling adjustment, trigger described open Loop Power control process, N and M positive integer for setting.
Described steps A, downlink closed-loop power control command that the user terminal record has sent or the uplink closed loop order of having carried out are the closed loop power control commands that increases power or reduce power; Described step B, judge that the downlink closed-loop power control command send or carry out or uplink closed loop order are that N continuous increases inferiorly that power control is adjusted or continuous N when reducing power inferiorly and controlling adjustment, trigger described open Loop Power control process, N and M positive integer for setting.
Described steps A, uplink closed loop order that the base station record has sent or the downlink closed-loop power control command of having carried out are the closed loop power control commands that increases power or reduce power; Described step B, when the power aggregate-value that judgement increases continuously in time period T surpasses threshold value L or the power aggregate-value that reduces continuously when surpassing threshold value K, trigger described open Loop Power control process, L and K constitute dynamic adjusting range, L and the K positive integer for setting.
Described steps A, downlink closed-loop power control command that the user terminal record has sent or the uplink closed loop order of having carried out are the closed loop power control commands that increases power or reduce power; Described step B, when the power aggregate-value that judgement increases continuously in time period T surpasses threshold value L or the power aggregate-value that reduces continuously when surpassing threshold value K, trigger described open Loop Power control process, L and K constitute dynamic adjusting range, L and the K positive integer for setting.
Among the step B, described triggering open Loop Power control is: carry out transmitting power estimation by the signal strength signal intensity of measuring on beacon channel or the pilot channel with open loop approach by user terminal.
Among the described step B, when triggering corresponding open Loop Power control, give the dynamic range of closed power control.
The characteristics of the inventive method are to utilize the information of closed power control to trigger open Loop Power control, are the Poewr control methods that a kind of open loop combines with closed loop.
The Poewr control method that open loop is combined with closed power control that is applied in the mobile communication system of the present invention, utilize the information of closed power control to trigger open Loop Power control, be to detect the adjustment that the certain continuously number of times of closed power control increases or reduce power when system, when the power that perhaps increases or reduce through the closed power control procedure is adjusted aggregate-value and surpassed separately predefined thresholding, trigger corresponding open Loop Power control process in a period of time.This process of utilizing the information of closed power control to trigger open Loop Power control both can have been carried out by the base station and also can have been carried out by travelling carriage (user terminal).
For tdd systems, can measure the signal strength signal intensity on its beacon channel or the pilot channel.According to the characteristics of TD-SCDMA system, promptly uplink downlink adopts identical frequency, and has used this special time slot of descending pilot frequency.The present invention measures in open Loop Power control can be signal strength signal intensity on descending pilot frequency time slot (DwPTS:Downlink Pilot Time Slot) or the master-Common Control Physical Channel (P-CCPCH:Primary CommonControl Physical Channel), it is very accurate that the open Loop Power control of system can be accomplished, therefore in up link, can carry out static comparatively accurately the adjustment to transmitting power by open Loop Power control, simultaneously, open Loop Power control can provide the dynamic range of closed power control on the ordinary meaning, and can make the closed power control after the triggering open Loop Power control can carry out accurate relatively dynamically adjustment, thereby reach the power control effect of optimization.Open Loop Power control has adopted the desirable Poewr control method that settles at one go, system can be eliminated preferably because of the long-time situation about worsening of the caused systematic function of environmental catastrophe, also can overcome when system's exterior ring power is controlled undesirable or lost efficacy, the shortcoming that systematic function changes along with environmental change, and because disposable desired value is provided with unreasonable caused systematic function and all impaired problem of capacity.
Description of drawings
Fig. 1 is in the inventive method, the power control block diagram when control section is positioned at the base station network system side;
Fig. 2 is in the inventive method, the power control block diagram when control section is positioned at the client terminal system side;
Fig. 3 is that the Poewr control method that open loop of the present invention combines with closed loop detects the FB(flow block) that number of times information is carried out in closed power control;
Fig. 4 is that the Poewr control method that open loop of the present invention combines with closed loop detects the FB(flow block) that closed power is controlled execution result information.
Embodiment
Method of the present invention is to utilize the information of closed power control to trigger open Loop Power control, and system triggers user terminal according to testing result and carries out corresponding open Loop Power control process under following four kinds of situations.
When system (travelling carriage or base station) detects the adjustment that (or having carried out) closed power control N continuous time (parameter value of default certain number of times) of having sent increases power, then trigger corresponding open Loop Power control process;
When system (travelling carriage or base station) detects the adjustment that (or having carried out) closed power control continuous N time (parameter value of default certain number of times) of having sent reduces power, then trigger corresponding open Loop Power control process;
Be controlled in given a period of time T and surpassed default thresholding L (dB) when system (travelling carriage or base station) detects (or the having carried out) closed power that has sent, then trigger corresponding open Loop Power control process because the power that closed power control increases is adjusted aggregate-value;
(the having carried out) closed power that has sent is controlled in given a period of time T has surpassed default thresholding K (dB) because the power that closed power control reduces is adjusted aggregate-value when system (travelling carriage or base station) detects, and then triggers corresponding open Loop Power control process.
System can be carried out by the base station for the detection of closed power control information, also can be carried out by user terminal.Can have two kinds to carry into execution a plan:
Wherein first kind of scheme is the power control scheme that control section is positioned at the base station network side.When the base station detects uplink closed loop order (or downlink closed-loop power control command of having carried out) N continuous step of having sent when increasing the adjustment of transmitting power (or the continuous N step reduces transmitting power), perhaps the power adjustment aggregate-value that increases in given time T internal cause closed power control has surpassed corresponding thresholding LdB when (the power adjustment aggregate-value that perhaps reduces has surpassed corresponding thresholding KdB), it is too big to show that present transmitting power of user terminal (or base station) and desirable desired transmitting power are compared gap, should carry out the adjustment of an open loop power, base station system can trigger the corresponding open Loop Power control process of carrying out.
Concrete module relationship as shown in Figure 1.In Fig. 1, only provided up example, descending similar with it.
Dotted line one side is the base station network system among the figure, and opposite side is a client terminal system.Control section in the frame of broken lines 10 (104,105) is positioned at the base station network system side, whether the base station network system carries out closed power control (103) according to the signal to noise ratio in the measurement report (101) and target signal to noise ratio (102) decision of calculating (also can according to the decision of parameters such as the error rate or received power), when satisfying closed power controlled condition to client terminal system send executions (increase power or reduce power+/-) instruction (TPC:Transmit Power Control) controlled of closed power; The execution that the memory record that while control section 10 utilizes maximum storage to equal M, N respectively sends continuously reduces power or increases closed power control (TPC) number of times (104) of power; Judge whether to arrive default thresholding, when reaching M respectively, triggering power adjustment and the instruction (105) of sending open Loop Power control to client terminal system N time the time.User terminal detects the signal strength signal intensity (111) of descending pilot frequency time slot (DwPTS), carries out open Loop Power control (112) after the instruction of acquisition from the execution open Loop Power control of control section 10; By the current execution open Loop Power control of switch control module (113) decision transmit power module (115) still is closed power control, after the instruction that receives from the execution open Loop Power control of control section 10, control transmit power module (115) and carry out open Loop Power control, otherwise control transmit power module (115) is carried out closed power control; Closed power control Executive Module (114) receive from the increase power of base station network system side or reduce power+/-the closed loop transmission power control command time, carry out concrete increase or reduce the power control operation, increase or reduce transmitting power by adjusting step-length.In this programme, 104 TPC that carried out of record, but the also recording power adjustment aggregate-value that increases or reduce when aggregate-value surpasses the thresholding that sets, trigger power adjustment (105).
Second kind of scheme wherein, be the power control scheme of control section: when user terminal records uplink closed loop order (or the downlink closed-loop power control command that has sent) N continuous step of having carried out when increasing the adjustment of transmitting power (or the continuous N step reduces transmitting power) in subscriber terminal side, perhaps the power adjustment aggregate-value that increases in given time T internal cause closed power control has surpassed corresponding thresholding LdB when (the power adjustment aggregate-value that perhaps reduces has surpassed corresponding thresholding KdB), showing that the present transmitting power of user terminal (or base station) is compared with desirable desired transmitting power differs too big, should carry out the adjustment of an open loop power, user terminal can trigger corresponding open Loop Power control process.
Concrete module relationship as shown in Figure 2.In Fig. 2, only provided up example, descending similar with it.
Dotted line one side is the base station network system among the figure, and opposite side is a client terminal system.Control section in the frame of broken lines 21 (216,217) is positioned at the client terminal system side, whether the base station network system carries out closed power control (203) according to the signal-to-noise ratio measurements (201) of user terminal to send up and target signal to noise ratio value (202) decision of calculating (also can according to the decision of parameters such as the error rate or received power), when satisfying closed power controlled condition to client terminal system send executions (increase power or reduce power+/-) instruction (TPC) controlled of closed power.Subscriber terminal side, when receiving this increase power or reducing the closed power control command of power, what the memory record that utilizes maximum storage to equal M, N had respectively been carried out reduces and closed loop transmission power control (TPC) number of times (216) that increases power; Judge whether to arrive default thresholding, when reaching M respectively, triggering power adjustment and the instruction (217) of sending open Loop Power control to client terminal system N time the time; Client terminal system detects the signal strength signal intensity (211) of descending pilot frequency time slot (DwPTS), carries out open Loop Power control (212) after the instruction of acquisition from the execution open Loop Power control of control section 21; By the current execution open Loop Power control of switch control module (213) decision transmit power module (215) still is closed power control, after the instruction that receives from the execution open Loop Power control of control section 21, control transmit power module (215) and carry out open Loop Power control, otherwise control transmit power module (215) is carried out closed power control; Closed power control Executive Module 214 receive from the increase power of base station network system side or reduce power+/-the closed loop transmission power control command time, carries out concrete power control operation, step-length increases or minimizing transmitting power (215) by adjusting.In this programme, 216 TPC that carried out of record, but the also recording power adjustment aggregate-value that increases or reduce when aggregate-value surpasses the thresholding that sets, trigger power adjustment (217).
Above-mentioned N, M, the parameter that L (dB) and K (dB) set for technical solution of the present invention.
In above-mentioned two kinds of schemes, after user terminal is received the instruction of open Loop Power control, user terminal will calculate the uplink transmission power of corresponding each channel (for different communication systems by the signal strength signal intensity of estimation descending pilot frequency time slot (DwPTS), can carry out open Loop Power control by the signal strength signal intensity of measuring on beacon channel or the pilot channel), carry out the adjustment of " settling at one go ".The power adjustment that base station network system one side is carried out can be carried out the renewal of " settling at one go " according to the information such as path loss that report in the measurement result of user terminal after open Loop Power control to the transmitting power of base station.
When triggering corresponding open Loop Power control, also provided the dynamic range of closed power control, the transmission power level that the maximum of this dynamic range equals the open Loop Power control estimation adds the step-length that X closed power is doubly controlled, the transmission power level that the minimum value of this dynamic range equals the open Loop Power control estimation deducts the step-length that Y times of closed power controlled, X, the Y positive integer for setting can obtain by emulation.Also X can be got during enforcement to become to increase continuously power control and adjust times N, Y is taken as continuous minimizing power control and adjusts number of times M.
Open Loop Power control adopts the Poewr control method of desirable " settling at one go ", the system that makes can eliminate preferably because of the long-time situation about worsening of the caused systematic function of environmental catastrophe, also can overcome when system's exterior ring power is controlled undesirable or lost efficacy, the shortcoming that systematic function changes along with the variation of environment, and because disposable desired value (as signal to noise ratio, the error rate, transmitting power etc.) is provided with unreasonable caused systematic function and all impaired problem of capacity.
Fig. 3 provides the number of times information (N or M) of carrying out that detects in open loop of the present invention and the Poewr control method that closed loop combines, starts the FB(flow block) of open Loop Power control at last.
Step 301 increases and reduces the counter O reset of power: TPC 1=0, TPC-1=0, power is increased or reduce be masked as 1:FLAG=1, number of times threshold value N, the M of increases, minimizing power is set;
Step 302 receives current power control (TPC) order;
Step 303 judges that this power control (TPC) order is to increase the order (TPC=-1) that the order (TPC=1) of power still reduces power, is the order execution in step 304 to 307 then that increases power, is the order execution in step 309 to 312 then that reduces power;
Step 304, current TPC is when increasing the order of power, what at first judge last execution is to increase the order that power (FLAG=1) still reduces power (FLAG=-1);
Step 305, if last execution is the order (FLAG=1) that increases power, then this makes the counter that increases power add 1, TPC_1 adds 1;
Step 306, if last execution is the order (FLAG=-1) of minimizing power, then this makes the 1:FLAG=1 that is masked as that increases or reduce power, makes the counter O reset TPC-1=0 that reduces power add 1 TPC_1 with the counter that makes increase power simultaneously and adds 1;
Step 307, whether the counter that judge to increase power equals N, is execution in step 308 then, starts the open Loop Power control process, is not then to return step 302, waits for receiving the TPC order;
Step 309, in step 303, when judging that current power control (TPC) order is when reducing the order of power, judge that at first last power control (TPC) order is to reduce power (FLAG=-1) still to increase power (FLAG=1), if FLAG=-1 is execution in step 310 then, if FLAG=1, then execution in step 311;
Step 310 if last execution is the order that reduces power, because of being reduces power continuously, then makes minimizing power counter add 1, and TPC_-1 adds 1;
Step 311 if last execution is the order (FLAG=1) of increase power, then makes being masked as-1:FLAG=-1 of increasing or reduce, and makes the counter O reset TPC_1=0 that increases power add 1 TPC_-1 with the counter that makes minimizing power simultaneously and adds 1;
Step 312, whether the counter that judge to reduce power equals M, is execution in step 308 then, starts the open Loop Power control process, is not then to return step 302, waits for receiving the TPC order;
Step 308 starts the open Loop Power control process, carries out the control of " settling at one go ".
Fig. 4 provides and detects execution result information (being stored among the counter Q) in open loop of the present invention and the Poewr control method that closed loop combines, starts the FB(flow block) of open Loop Power control at last.
Step 401, time timer t zero clearing, the power that increases in the closed power control procedure and reduce is adjusted aggregate-value counter O reset: Q1=0, and Q2=0 sets a time threshold T, the aggregate-value thresholding K that aggregate-value thresholding L that power increases and power reduce;
Step 402 is judged t T, if satisfy execution in step 403, otherwise returns execution in step 401;
Step 403 judges that power control (TPC) order of current reception is to increase the order that the order (TPC=1) of power still reduces power (TPC=-1), is the order execution in step 404 then that increases power, is the order execution in step 406 then that reduces power;
Step 404 is to make the aggregate-value counter Q1 that increases power increase the adjustment step-length S of a current closed power control procedure, Q1=Q1+S when increasing power at the power control command of current reception;
Step 405 is judged Q1 L, if satisfy then execution in step 408, starts the open Loop Power control process, otherwise returns step 402;
Step 406 is to make the aggregate-value counter Q2 that reduces power reduce the adjustment step-length S of a current closed power control procedure, Q2=Q2-S when reducing power at the power control command of current reception;
Step 407 is judged Q2 K, if satisfy execution in step 408, starts the open Loop Power control processing procedure, carries out otherwise return step 402;
Step 408 starts the open Loop Power control processing procedure.
Be that example further specifies concrete control procedure of the present invention with the Poewr control method on the DPCH in the TD-SCDMA system (DPCH) below.
Detect the up TPC inferior adjustment that increases transmitting power of N continuous of a certain communication link when the base station, the perhaps inferior adjustment that reduces transmitting power of continuous N, the aggregate-value that perhaps increases continuously power surpasses thresholding L, when the aggregate-value that perhaps reduces power continuously surpasses thresholding K, the action of the open Loop Power control that the base station can be by the network-triggered user terminal.Concrete open loop computational process is as follows:
The transmitting power P of up DPCH (DPCH) Traffic Channel
DPCHCan calculate with reference to formula (1):
P
DPCH＝PRX
PDPCHdes+L
Dwpts。(1)
Wherein, L
DwptsFor measuring the signal fadeout on descending pilot frequency time slot (Dwpts) signal strength signal intensity or the P-CCPCH; PRX
PDPCHdesRepresent the received power that expectation obtains on this channel.
The received power PRX that expectation obtains on this channel
PDPCHdesCan calculate according to formula (2)
Wherein, (SIR)
DPCHRepresent the received signal to noise ratio that expectation obtains on this channel; I
PDPCHRepresent the interference power on this channel.
Still return the closed power control procedure after triggering open Loop Power control process of execution.
Poewr control method of the present invention can be applicable in the equipment and device and user terminal of time-division duplex (TDD-CDMA) mobile communication system, also can be applicable in the mobile communication system of alternate manner, can carry out open Loop Power control by the signal strength signal intensity of measuring on beacon channel or the pilot channel for different communication systems, needn't painstakingly on descending pilot frequency time slot (DwPTS), carry out signal measurement.
Claims (12)
1. the Poewr control method of a mobile communication system is characterized in that comprising following treatment step:
A. system carries out closed power control, and the control information of record closed power;
B. system judges whether the identical closed power control information that recording occurring continuously arrives surpasses its default threshold value, is then to trigger the open Loop Power control process to return closed power control then, otherwise proceeds the closed power control procedure.
2. the Poewr control method of mobile communication system according to claim 1 is characterized in that: the closed power control information of being write down in the steps A comprises the adjustment number of times that increases continuously power that sent or that carried out that system detects and reduces the adjustment number of times of power continuously.
3. the Poewr control method of mobile communication system according to claim 1 is characterized in that: the closed power control information of being write down in the steps A comprises adjustment aggregate-value that increases continuously power and the adjustment aggregate-value that reduces power continuously.
4. the Poewr control method of mobile communication system according to claim 1, it is characterized in that: described steps A, uplink closed loop order that the base station record has sent or the downlink closed-loop power control command of having carried out are the closed loop power control commands that increases power or reduce power; Described step B, judge that the uplink closed loop order send or carry out or downlink closed-loop power control command are that N continuous increases inferiorly that power control is adjusted or continuous N when reducing power inferiorly and controlling adjustment, trigger described open Loop Power control process, N and M positive integer for setting.
5. the Poewr control method of mobile communication system according to claim 1, it is characterized in that: described steps A, downlink closed-loop power control command that the user terminal record has sent or the uplink closed loop order of having carried out are the closed loop power control commands that increases power or reduce power; Described step B, judge that the downlink closed-loop power control command send or carry out or uplink closed loop order are that N continuous increases inferiorly that power control is adjusted or continuous N when reducing power inferiorly and controlling adjustment, trigger described open Loop Power control process, N and M positive integer for setting.
6. the Poewr control method of mobile communication system according to claim 1, it is characterized in that: described steps A, uplink closed loop order that the base station record has sent or the downlink closed-loop power control command of having carried out are the closed loop power control commands that increases power or reduce power; Described step B, when the power aggregate-value that judgement increases continuously in time period T surpasses threshold value L or the power aggregate-value that reduces continuously when surpassing threshold value K, trigger described open Loop Power control process, L and K constitute dynamic adjusting range, L and the K positive integer for setting.
7. the Poewr control method of mobile communication system according to claim 1, it is characterized in that: described steps A, downlink closed-loop power control command that the user terminal record has sent or the uplink closed loop order of having carried out are the closed loop power control commands that increases power or reduce power; Described step B, when the power aggregate-value that judgement increases continuously in time period T surpasses threshold value L or the power aggregate-value that reduces continuously when surpassing threshold value K, trigger described open Loop Power control process, L and K constitute dynamic adjusting range, L and the K positive integer for setting.
8. the Poewr control method of mobile communication system according to claim 1, it is characterized in that: described steps A, the upstream or downstream closed loop power control command that base station or user terminal record have sent, the downlink or uplink closed loop power control command of perhaps having carried out are the closed loop power control commands that increases power or reduce power; Described step B, judge that the upstream or downstream closed loop power control command send or carry out is that N continuous increases inferiorly that power control is adjusted or continuous N when reducing power inferiorly and controlling adjustment, or judge when the power aggregate-value increase continuously in time period T surpasses threshold value L or the power aggregate-value that reduces continuously when surpassing threshold value K, trigger described open Loop Power control process, N and M, L and K positive integer for setting.
9. the Poewr control method of mobile communication system according to claim 1, it is characterized in that: among the step B, described triggering open Loop Power control is: carry out transmitting power estimation by the signal strength signal intensity of measuring on beacon channel or the pilot channel with open loop approach by user terminal.
10. the Poewr control method of mobile communication system according to claim 9, it is characterized in that: the signal strength signal intensity on described measurement beacon channel or the pilot channel is to measure the signal strength signal intensity of descending pilot frequency time slot or the signal strength signal intensity on master-Common Control Physical Channel.
11. the Poewr control method of mobile communication system according to claim 1, it is characterized in that: among the described step B, when triggering corresponding open Loop Power control, give the dynamic range of closed power control, the transmission power level that the maximum of this dynamic range equals the open Loop Power control estimation adds the step-length that X closed power is doubly controlled, the transmission power level that the minimum value of this dynamic range equals the open Loop Power control estimation deducts the step-length that Y times of closed power controlled, X, the Y positive integer for setting.
12. the Poewr control method of mobile communication system according to claim 11 is characterized in that: described X gets and increases continuously power control adjustment times N, and described Y gets continuous minimizing power control and adjusts number of times M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031499082A CN1322767C (en) | 2003-07-29 | 2003-07-29 | Power control method for mobile communication system |
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| CNB031499082A CN1322767C (en) | 2003-07-29 | 2003-07-29 | Power control method for mobile communication system |
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| CN1322767C true CN1322767C (en) | 2007-06-20 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393018C (en) * | 2006-02-21 | 2008-06-04 | 中兴通讯股份有限公司 | Time division synchronous code division multiple access communication system combined rate and power regulating method |
| KR101637798B1 (en) | 2006-10-03 | 2016-07-07 | 인터디지탈 테크날러지 코포레이션 | Combined open loop/closed loop (cqi-based) uplink transmit power control with interference mitigation for e-utra |
| CN107105489A (en) * | 2006-10-03 | 2017-08-29 | 交互数字技术公司 | Combined type open/close for E UTRA interference mitigation（Based on CQI）Up-link transmission power is controlled |
| CN101188442B (en) * | 2006-11-15 | 2011-08-10 | 中兴通讯股份有限公司 | Closed loop power control method |
| MY151945A (en) * | 2007-03-07 | 2014-07-31 | Interdigital Tech Corp | Combined open loop/closed loop method for controlling uplink power of a mobile station |
| CN101868011B (en) * | 2009-04-17 | 2013-05-29 | 深圳富泰宏精密工业有限公司 | Power control system and method for mobile device |
| CN103298091B (en) * | 2012-03-01 | 2018-08-24 | 中兴通讯股份有限公司 | Uplink transmission power determines method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5267262A (en) * | 1989-11-07 | 1993-11-30 | Qualcomm Incorporated | Transmitter power control system |
| CN1253429A (en) * | 1998-11-05 | 2000-05-17 | 日本电气株式会社 | Code division multi address emissive power control capable of avoiding calling interruption and decline of user capacity |
| CN1272987A (en) * | 1998-07-13 | 2000-11-08 | 三星电子株式会社 | Power control device and method for reverse link common channel in mobile communication system |
| US6236863B1 (en) * | 1997-03-31 | 2001-05-22 | Oki Telecom, Inc. | Comprehensive transmitter power control system for radio telephones |
| JP2001298412A (en) * | 2000-03-10 | 2001-10-26 | Denso Corp | Power control system, power controller, power control method, wireless phone system, and closed loop power control system for wireless communication |
| CN1343400A (en) * | 1999-03-22 | 2002-04-03 | 交互数字技术公司 | Combined closed loop/open loop power control in time division duplex communication system |
-
2003
- 2003-07-29 CN CNB031499082A patent/CN1322767C/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5267262A (en) * | 1989-11-07 | 1993-11-30 | Qualcomm Incorporated | Transmitter power control system |
| US6236863B1 (en) * | 1997-03-31 | 2001-05-22 | Oki Telecom, Inc. | Comprehensive transmitter power control system for radio telephones |
| CN1272987A (en) * | 1998-07-13 | 2000-11-08 | 三星电子株式会社 | Power control device and method for reverse link common channel in mobile communication system |
| CN1253429A (en) * | 1998-11-05 | 2000-05-17 | 日本电气株式会社 | Code division multi address emissive power control capable of avoiding calling interruption and decline of user capacity |
| CN1343400A (en) * | 1999-03-22 | 2002-04-03 | 交互数字技术公司 | Combined closed loop/open loop power control in time division duplex communication system |
| JP2001298412A (en) * | 2000-03-10 | 2001-10-26 | Denso Corp | Power control system, power controller, power control method, wireless phone system, and closed loop power control system for wireless communication |
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| CN1578489A (en) | 2005-02-09 |
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