CN102316476A - Different-frequency cell measuring method for mobile terminal in case of wake-up from sleep - Google Patents
Different-frequency cell measuring method for mobile terminal in case of wake-up from sleep Download PDFInfo
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Abstract
The invention provides a different-frequency cell measuring method in case of wake-up from sleep. The method comprises the following steps: measuring a subframe for each different-frequency point, calculating the average power of the received n chips after the UE (user equipment) receives n chips before a TS0 time slot data field 1, and taking the average power as received signal strength indication (RSSI) of the different-frequency point; calculating the gain adjustment quantity delta agc of automatic gain control (AGC) according to the obtained RSSI and an expected target value RSSITarget of the different-frequency point; adjusting the AGC of the different-frequency point according to delta agc; and measuring the cells at the different-frequency points by virtue of the adjusted AGC. The method provided by the invention has the beneficial effects that the AGC of each different-frequency point is adjusted in real time by virtue of the newly obtained data, thus effectively reducing the AGC effectiveness risk when the UE receives the data of each different-frequency point in the case of wake-up from sleep, and improving the measurement precision of each different-frequency point.
Description
Technical field
The present invention relates to the mobile communication system cell measuring technique, specially refer to a kind of portable terminal and (be called for short UE) alien-frequency district method of measurement when sleep awakening.
Background technology
(be called for short, physical channel TD-SCDMA) adopts four-layer structure: system-frame, radio frames, subframe and time slot (are called for short, TS) Time Division-Synchronous Code Division Multiple Access.Time slot is used on time domain, distinguishing the different user signal, and the length of a radio frames is 10ms, is divided into two 5ms subframes; The structure of 2 sub-frame in every 10ms frame length is identical, and is as shown in Figure 1, comprises 7 business time-slots; (be called for short, DwPTS), uplink pilot time slot (is called for short descending pilot frequency time slot; UpPTS) and main protection (abbreviating GP as) at interval, the length of each business time-slot is that 864 chips (are called for short duration chip).Business time-slot comprise two data fields, one long be that the training sequence of 144chip (is called for short; Midamble) and a protection at interval; Each data field length is 352chip, and corresponding symbolic number is relevant with spreading factor, and protection length at interval is 16chips; Each chip is made up of I and Q two paths of signals, and the structure of business time-slot is as shown in Figure 2.
In the TD-SCDMA system, UE has two basic operator schemes: idle pulley and connection mode.The information that has no UE under the independent idle pulley in the TD-SCDMA system, network terminal can only be carried out addressing, and all UE or all UE of monitoring same paging occasions send message in the sub-district.
UE is under the idle pulley, the control of initiation Radio Resource (be called for short, before RRC) connection is set up and applied for, comprise following working contents usually:
Reception (is called for short system message PLMN) from public land mobile network
Monitor paging
District reselecting
Wherein, said system message receive based on the persistent district Primary Common Control Physical Channel (be called for short, information analysis PCCPCH), and depend on the notice of paging Class1 message, said paging Class1 message bearing in PCH (be called for short, PCH) in; Paging is monitored successively based on Page Indication Channel and (is called for short, PICH) with the information analysis of PCH; District reselecting triggers according to the measurement result of basis, adjacent sub-district Primary Common Control Physical Channel received signal code power (being called for short PCCPCH RSCP); In addition, provide support for RRC connects to set up, (be called for short, measurement ISCP) also needs each downlink slot interfering signal of time sign indicating number power of Serving cell.
It is thus clear that; The steady job task of UE mainly is that paging monitoring and district reselecting are measured and Serving cell descending time slot ISCP measures under the idle pulley; And whether operating state is migrated to RRC connection mode or update system message, and whether initiate district reselecting according to the measurement result decision according to paging snoop results decision.
Said paging monitoring and district reselecting measuring task are normally periodically carried out according to high-rise designated time intervals; And the said appointment execution cycle (paging cycle (be called for short, DRX) and measuring period, according to 3GPPTS 25.123; Be the integral multiple of paging cycle measuring period) accomplish the average handling time of said required by task much larger than UE; A paging cycle be spaced apart 128,256,512 or 1024 sub-frame.That is, under idle pulley, UE will have the plenty of time to be in the idling conditions of no task.Obviously, said idling conditions is the significant wastage to UE resource and power consumption.
Given this, present main flow UE solution has been introduced new UE mode of operation a--sleep pattern again.Said sleep pattern is defined as: when UE was in the idling conditions of no task, UE closed high-frequency work clock, peripheral ABB device, radio-frequency devices etc., only uses low-frequency clock to carry out work, to reach the power saving purpose under the idling conditions.Sleep pattern will finish before task arrives; The said concluding time is a foundation with PICH time of advent usually; Said ending method is for recovering the operating state of stable high frequency clock, peripheral ABB device, radio-frequency devices etc., and relevant operation is called sleep awakening.
Through after the sleep of certain hour, receive the influence of wireless environment variation and low-frequency clock precision, the timing synchronized relation between UE and serving BS will inevitably be affected.The TD-SCDMA system be a strictness time division duplex (be called for short, TDD) system, the transmission of its data is that different time-gap in same subframe carries out with receiving.For guaranteeing the performance of communication link, the timing between UE and base station is very important synchronously.Therefore, the primary Processing tasks of UE sleep awakening be exactly realize and the base station between timing recover synchronously, to guarantee paging monitoring and measuring reliability.
Current typical sleep awakening operation scheme, as shown in Figure 3, comprise following core process:
1, before UE sleeps under the idle pulley,, calculates the time point that next PICH arrives in advance according to 3GPP TS 25.304 relevant regulations; Conversion device stabilization time and algnment recovery time are gone up in the some basis at this moment, can know the triggered time of UE sleep awakening;
2, UE gets into sleep in the m subframe, according to aforementioned triggered time calculating, wake up in the n-1 subframe, and it is stable to accomplish device;
3, begin from the n subframe, UE receives TS0 midamble or DwPTS implements regularly synchronization and estimation;
4, in the n+p-1 subframe, UE accomplishes regularly synchronization and estimation, and the timing that and guides follow-up data to receive is adjusted synchronously;
5, in the n+p subframe, UE monitors and resolves PICH, measures and each the descending time slot ISCP measurement of Serving cell dominant frequency point according to each subdistrict beaconing channel RSCP of measurement control order service implementation sub-district dominant frequency point;
6, begin from the n+p+1 subframe, UE implements each subdistrict beaconing channel RSCP of pilot frequency point according to measurement control order and measures; Adjacent area to be measured frequency point information is from system broadcasts;
7, according to PICH snoop results and cell measurement results, UE carries out follow-up associative operation.
Analyze above-mentioned said flow process, the pilot frequency point cell measurement comprises following risk in the existing sleep awakening flow process:
1, automatic gain control (be called for short AGC) validity risk:
In the said flow process; In " each subdistrict beaconing channel RSCP of pilot frequency point measures "; The AGC of each frequency only can continue to use the historical AGC setting of 0.64s at least at interval of last paging cycle; The said time interval is very easily satisfied the condition much larger than the correlated time of channel at moving communicating field, and said historical AGC has not had any reference; Inherit based on said invalid historical AGC, pilot frequency point cell measurement associative operation precision risk is very big.
2, certainty of measurement risk.
In the said flow process, the planning of each pilot frequency point data measured sample is a sub-frame, and it is not good to can not put up with the metrical information quality, and the signal quality fluctuation that very easily causes wake operation to be brought because of the UE mobility was lost efficacy or output abnormality.
Summary of the invention
In view of this, the invention provides a kind of mobile terminal sleeping and wake different-frequency measuring method up, the AGC validity risk when receiving different frequency point data to reduce UE when the sleep awakening improves the pilot frequency point certainty of measurement.
Technical scheme of the present invention is that a kind of mobile terminal sleeping wakes different-frequency measuring method up, comprising:
1, each pilot frequency point is measured subframe, UE calculates the average power of n received chip after receiving preceding n chip of TS0 time slot data field 1, with its reception signal strength signal intensity indication RSSI as this pilot frequency point;
2, utilize the RSSI of calculating acquisition and this frequency target RSSI value RSSI of expection
TargetCalculate the amount of gain adjustment Δ agc of automatic gain control AGC, Δ agc=RSSI
Target-RSSI;
3, adjust the automatic gain control AGC of said pilot frequency point according to Δ agc;
4, use adjusted AGC to carry out each cell measurement of said pilot frequency point;
Wherein, the span of said n is 17～240.
Further, the said AGC that adjusts said pilot frequency point according to Δ agc comprises:
If Δ agc＜T
AGC, the AGC to the terminal does not adjust;
If Δ agc＞T
AGC, and AGC+ Δ agc＞agc_max, the AGC=agc_max of setting terminal;
If Δ agc＞T
AGC, and AGC+ Δ agc＜agc_min, the AGC=agc_min of setting terminal;
If Δ agc＞T
AGC, and agc_min＜AGC+ Δ agc＜agc_max, the AGC=AGC+ Δ agc of setting terminal;
Wherein, said T
AGCBe predefined AGC adjustment thresholding, its value is set according to the empirical value of reality test; Agc_max is the maximum AGC that the terminal can be provided with, and agc_min is the minimum AGC that the terminal can be provided with.
Further, said method also comprises AGC amount of gain adjustment makeover process:
UE adds up the number I_overflow_num_fn that has the chip that I road signal overflows among preceding n the chip that said pilot frequency point measures subframe TS0 data field 1;
UE adds up the number Q_overflow_num_fn that has the chip that Q road signal overflows among preceding n the chip that said pilot frequency point measures subframe TS0 data field 1;
If I_overflow_num_fn+Q_overflow_num_fn is greater than preset correction thresholding Threshold
FlowNum, revising said Δ agc is Δ agc=Δ agc-reduce_agc_value;
Wherein, said criterion of overflowing is abs (I_part1 (i))＞Th
OverFlow, abs (Q_part1 (i))＞Th
OverFlowSaid abs (I_part1 (i)) is the absolute value of the I road signal of i chip, and said abs (Q_part1 (i)) is the absolute value of the Q road signal of i chip, i≤n;
Said reduce_agc_value sets according to the empirical value of reality test for the preset correction value of overflowing, its value.
Further, said cell measurement comprises:
If there is the invalid and last effective sub-district of measurement result measuring period of this measurement result in measured pilot frequency point; Or the effective and last invalid sub-district of measurement result measuring period of this measurement result; Or this measurement result and last one measuring period measurement result difference greater than the preset sub-district of surveying thresholding of mending, UE remeasures this pilot frequency point;
Wherein, said measurement result is that invalid determination methods does,
If the PCCPCH RSCP of the sub-district that measures is less than the preset thresholding Th of signal strength signal intensity
RSCP, this cell measurement results is invalid;
Said Th
RSCPEmpirical value according to the reality test is set.
Further, said cell measurement comprises:
If all satisfy all sub-districts of measured pilot frequency point, the signal to noise ratio of this sub-district that a last measuring period and this measurement measure is all less than the preset thresholding Th of signal to noise ratio
Scale, and the PCCPCH RSCP of this sub-district of measuring of a last measuring period and this measurement is all less than the preset thresholding Th of signal strength signal intensity
RSCP, be set to m DRX cycle the measuring period of this frequency of UE, otherwise, be set to 1 DRX cycle the measuring period of this frequency of UE;
Wherein, said Th
ScaleAnd said Th
RSCPEmpirical value according to the reality test is set, and the span of said m is 2～5.
Technical scheme of the present invention is behind preceding n the chip that receives each pilot frequency point measurement subframe; Utilize the new data that obtain that the AGC gain of this pilot frequency point is adjusted in real time; AGC gain validity risk when having effectively reduced the reception different frequency point data of UE when sleep awakening has improved the pilot frequency point certainty of measurement.
Description of drawings
Fig. 1 is a TD-SCDMA system subframe structure sketch map
Fig. 2 is a TD-SCDMA system business structure of time slot sketch map
Fig. 3 is a prior art sleep awakening schematic flow sheet
Fig. 4 is the specific embodiment of the invention 1 flow chart
Fig. 5 is the specific embodiment of the invention 2 flow charts
Fig. 6 is the specific embodiment of the invention 3 flow charts
Fig. 7 is the specific embodiment of the invention 4 flow charts
Embodiment
For further specifying the present invention, technical scheme of the present invention is described in detail below in conjunction with accompanying drawing and specific embodiment.
The overall procedure of present embodiment is as shown in Figure 4.
Each pilot frequency point is measured subframe:
1, UE receives preceding n the chip that this pilot frequency point is measured subframe TS0 time slot data field 1;
The span of said n is 17～240, in the present embodiment, and n=17;
2, UE calculates the average power of a said n chip, with it as RSSI;
3, UE calculates this frequency AGC amount of gain adjustment Δ agc, and specifically computational methods do,
Δagc＝RSSI
Target-RSSI
Wherein, said RSSI
TargetBe this frequency target RSSI value of predefined this pilot frequency point expection, need set that reach best receptivity with receiver and be as the criterion, span is 16～22 according to the measured performance at terminal, in the present embodiment, RSSI
Targer=18;
4, UE adjusts the AGC of said pilot frequency point;
UE judges according to Δ agc,
If abs (Δ agc)＜T
AGC, the AGC to the terminal does not adjust;
If abs (Δ agc)＞T
AGC, and AGC+ Δ agc＞agc_max, the AGC=agc_max of setting terminal;
If abs (Δ agc)＞T
AGC, and AGC+ Δ agc＜agc_min, the AGC=agc_min of setting terminal;
If abs (Δ agc)＞T
AGC, and agc_min＜AGC+ Δ agc＜agc_max, the AGC=AGC+ Δ agc of setting terminal;
Wherein, said T
AGCBe predefined AGC gain adjustment thresholding, its value is set according to reality test empirical value, is set to 0 or 1 usually; Said agc_max is the maximum AGC that the terminal can be provided with, and agc_min is the minimum AGC that the terminal can be provided with, and abs () is the operation that takes absolute value;
5, UE carries out each cell measurement of this pilot frequency point.
The present embodiment overall procedure is as shown in Figure 5.
Each pilot frequency point is measured subframe:
In the present embodiment, n=240;
In the present embodiment, RSSI
Target=16;
4, UE revises Δ agc, and this step further comprises,
401, UE adds up abs (I_part1 (i))＞Th in preceding n the chip data of said TS0 time slot data field 1
OverFlowChip number I_overflow_num_fn;
402UE adds up abs (Q_part1 (i))＞Th in preceding n the chip data of said TS0 time slot data field 1
OverFlowChip number Q_overflow_num_fn;
Wherein, said I_part1 (i) is the I road signal of i chip, and said Q_part1 (i) is the Q road signal of i chi p, i≤n; Said abs () is the operation that takes absolute value; Said Th
OverFlowBe the predefined thresholding that overflows, span is 25000～40000, Th in the present embodiment
OverFlow=32700;
403, UE judges that whether I_overflow_num_fn+Q_overflow_num_fn is greater than preset correction threshold T hreshold
FlowNum, if execution in step 404, otherwise execution in step 5;
Wherein, Threshold
FlowNumSpan is 10～14, Threshold in the present embodiment
FlowNum=10;
404、Δagc＝Δagc-reduce_agc_value；
Said reduce_agc_value is an AGC amount of gain adjustment corrected parameter, and its value is set according to reality test empirical value, in the present embodiment; Reduce_agc_value=Max (I_overflow_num_fn; Q_overflow_num_fn)/4, wherein, Max () is for to get one bigger in two numbers;
Step 6 is identical with specific embodiment 1 step 5.
In the scheme of present embodiment, UE has carried out further correction according to the situation of overflowing of each data in the data sample to the AGC amount of gain adjustment, has further improved the accuracy that AGC is provided with.
Specific embodiment 3
This enforcement overall procedure is as shown in Figure 6.
Each pilot frequency point is measured subframe:
Wherein, n=100 in the present embodiment, RSSI
Target=20, Th
OverFlow=25000, Threshold
FlowNum=14, reduce_agc_value=Max (I_overflow_num_fn, Q_overflow_num_fn)/4), wherein, Max () is for to get one bigger in two numbers;
6, UE carries out each cell measurement of this pilot frequency point;
7, UE judge each sub-district of this pilot frequency point whether exist the effective and last invalid sub-district of measurement result measuring period of the invalid and last effective sub-district of measurement result measuring period of this measurement result or this measurement result or this measurement result and last one measuring period measurement result difference greater than the preset sub-district of surveying thresholding of mending; If; Execution in step 8, otherwise execution in step 9;
701, UE judges that the PCCPCH RSCP that whether has this measurement in each sub-district of this pilot frequency point is more than or equal to preset signals strength threshold Th
RSCPThe sub-district, if, execution in step 702, otherwise execution in step 704;
702, the PCCPCH RSCP of this measurement of UE selection is more than or equal to Th
RSCPThe sub-district, judge whether selected sub-district was more than or equal to Th at the PCCPCH of last measuring period RSCP
RSCP, if execution in step 703, otherwise execution in step 8
703, UE judges that the difference that whether had the PCCPCH RSCP that satisfies this and the PCCPCH RSCP of a last measuring period in the selected sub-district surveys thresholding Threshold greater than preset the benefit
RSCPThe sub-district, if execution in step 8, otherwise execution in step 9
704, UE judges that the PCCPCH RSCP that whether has a measuring period in each sub-district of this pilot frequency point is more than or equal to Th
RSCPThe sub-district, if, execution in step 8, otherwise execution in step 9;
Said Th
RSCPEmpirical value according to the reality test is set, and general span is 5～15; In the present embodiment, Th
RSCP=5; Said Threshold
RSCPValue set Threshold in the present embodiment according to the empirical value of reality test
RSCP=5db;
8, UE remeasures this pilot frequency point in next subframe;
9, UE accomplishes this measurement to this pilot frequency point.
In the present embodiment; UE is after measuring pilot frequency point; Measurement result and the last cycle measurement result to this frequency is compared, when between two measurement results, existing, carry out once measurement again this frequency than big-difference; Effectively avoided because the measurement mistake that the unexpected fluctuation of signal quality causes has further improved the pilot frequency point certainty of measurement.
Specific embodiment 4
This enforcement overall procedure is as shown in Figure 7.
Each pilot frequency point is measured subframe:
Wherein, in the present embodiment, n=100, RSSI
Target=22, ThO
VerFlow=40000, Threshold
FlowNum=12, and reduce_agc_value=Max (I_overflow_num_fn, Q_overflow_num_fn)/4, wherein, Max () is for to get one bigger in two numbers;
9, UE judges whether all sub-districts of measured pilot frequency point all satisfy, and the signal to noise ratio of a last measuring period and this this sub-district that measures is all less than the preset thresholding Th of signal to noise ratio
Scale, and the PCCPCH RSCP of a last measuring period and this this sub-district that measures is all less than the preset thresholding Th of signal strength signal intensity
RSCP, be set to m DRX cycle the measuring period of this frequency of UE, otherwise, be set to 1 DRX cycle the measuring period of this frequency of UE;
Wherein, Th
ScaleEmpirical value according to the reality test is set, and general span is 5～15; The m value is 2～5;
In the present embodiment, this step Th
RSCP=10, Th
Scale=10, m=3;
10, UE accomplishes this measurement to this pilot frequency point.
In the present embodiment; UE prolongs its measuring period to continuous two frequencies that all do not have the efficient cell existence more than measuring period; Effectively avoided the frequent situation that some invalid frequency is measured of UE; Thereby reduced UE and carried out the required time of pilot frequency point measurement, effectively reduced the power consumption of UE.
It will be apparent to those skilled in the art that and understand that the above embodiment that the inventive method is lifted only is used to explain the present invention, and is not limited to the present invention.Though effectively described the present invention through embodiment; Those skilled in the art will know that; There are many variations in the present invention and do not break away from spirit of the present invention; Under the situation that does not deviate from spirit of the present invention and essence thereof, those skilled in the art work as can make various corresponding changes or distortion according to the inventive method, but these corresponding changes or distortion all belong to claim protection range of the present invention.
Claims (6)
1. the alien-frequency district method of measurement is characterized in that when a mobile terminal sleeping woke up, comprising:
Each pilot frequency point is measured subframe, and mobile terminal UE is calculated the average power of n received chip after receiving preceding n chip of TS0 time slot data field 1, with its reception signal strength signal intensity indication RSSI as this pilot frequency point;
Utilize the RSSI of calculating acquisition and this frequency target RSSI value RSSI of expection
TargetCalculate the amount of gain adjustment Δ agc of automatic gain control AGC, Δ agc=RSSI
Target-RSSI;
Adjust the AGC of said pilot frequency point according to Δ agc;
Use adjusted AGC to carry out each cell measurement of said pilot frequency point;
Wherein, the span of said n is 17～240.
2. the alien-frequency district method of measurement is characterized in that when a kind of mobile terminal sleeping according to claim 1 woke up, and the said AGC that adjusts said pilot frequency point according to Δ agc comprises:
If Δ agc＜T
AGC, the AGC to the terminal does not adjust;
If Δ agc＞T
AGC, and AGC+ Δ agc＞agc_max, the AGC=agc_max of setting terminal;
If Δ agc＞T
AGC, and AGC+ Δ agc＜agc_min, the AGC=agc_min of setting terminal;
If Δ agc＞T
AGC, and agc_min＜AGC+ Δ agc＜agc_max, the AGC=AGC+ Δ agc of setting terminal;
Wherein, said T
AGCBe predefined AGC adjustment thresholding, its value is set according to the empirical value of reality test; Agc_max is the maximum AGC that the terminal can be provided with, and agc_min is the minimum AGC that the terminal can be provided with.
3. the alien-frequency district method of measurement is characterized in that when a kind of mobile terminal sleeping according to claim 1 woke up, also comprised AGC amount of gain adjustment makeover process:
UE adds up the number I_overflow_num_fn that has the chip that I road signal overflows in preceding n the chip that said pilot frequency point measures subframe TS0 data field 1;
UE adds up the number Q_overflow_num_fn that has the chip that Q road signal overflows in preceding n the chip that said pilot frequency point measures subframe TS0 data field 1;
If I_overflow_num_fn+Q_overflow_num_fn is greater than preset correction thresholding Threshold
FlowNum, revising said Δ agc is Δ agc=Δ agc-reduce_agc_value;
Wherein, said criterion of overflowing is abs (I_part1 (i))＞Th
OverFlow, abs (Q_part1 (i))＞Th
OverFlowSaid abs (I_part1 (i)) is the absolute value of the I road signal of i chip, and said abs (Q_part1 (i)) is the absolute value of the Q road signal of i chip, i≤n;
Said reduce_agc_value sets according to the empirical value of reality test for the preset correction value of overflowing, its value.
4. wake the alien-frequency district method of measurement up according to each described a kind of mobile terminal sleeping in the claim 1～3, it is characterized in that, also comprise:
If there is the invalid and last effective sub-district of measurement result measuring period of this measurement result in measured pilot frequency point; Or the effective and last invalid sub-district of measurement result measuring period of this measurement result; Or this measurement result and last one measuring period measurement result difference greater than the preset sub-district of surveying thresholding of mending, UE remeasures this pilot frequency point;
Wherein, said measurement result is that invalid determination methods does,
If the Primary Common Control Physical Channel received signal code power PCCPCH RSCP of the sub-district that measures is less than the preset thresholding Th of signal strength signal intensity
RSCP, this cell measurement results is invalid;
Said Th
RSCPEmpirical value according to the reality test is set.
5. wake the alien-frequency district method of measurement up according to each described a kind of mobile terminal sleeping in the claim 1～3, it is characterized in that, also comprise:
If all satisfy all sub-districts of measured pilot frequency point, the signal to noise ratio of this sub-district that a last measuring period and this measurement measure is all less than the preset thresholding Th of signal to noise ratio
Scale, and the Primary Common Control Physical Channel received signal code power PCCPCH RSCP of this sub-district of measuring of a last measuring period and this measurement is all less than the preset thresholding Th of signal strength signal intensity
RSCP, be set to m paging cycle the measuring period of this frequency of UE, otherwise, be set to 1 paging cycle the measuring period of this frequency of UE;
Wherein, said Th
ScaleAnd said Th
RSCPEmpirical value according to the reality test is set, and the span of said m is 2～5.
6. a kind of mobile terminal sleeping according to claim 4 wakes the alien-frequency district method of measurement up, it is characterized in that, also comprises:
If all satisfy all sub-districts of measured pilot frequency point, the signal to noise ratio of this sub-district that a last measuring period and this measurement measure is all less than the preset thresholding Th of signal to noise ratio
Scale, and the Primary Common Control Physical Channel received signal code power PCCPCH RSCP of this sub-district of measuring of a last measuring period and this measurement is all less than the preset thresholding Th of signal strength signal intensity
RSCP, be set to m paging cycle the measuring period of this frequency of UE, otherwise, be set to 1 paging cycle the measuring period of this frequency of UE;
Wherein, said Th
ScaleAnd said Th
RSCPEmpirical value according to the reality test is set, and the span of said m is 2～5.
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| CN106162682A (en) * | 2015-03-25 | 2016-11-23 | 苏州简约纳电子有限公司 | The method and apparatus that automatic growth control AGC adjusts |
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