CN105704803B - A kind of downlink signal sending method and Remote Radio Unit - Google Patents
A kind of downlink signal sending method and Remote Radio Unit Download PDFInfo
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- CN105704803B CN105704803B CN201610151559.3A CN201610151559A CN105704803B CN 105704803 B CN105704803 B CN 105704803B CN 201610151559 A CN201610151559 A CN 201610151559A CN 105704803 B CN105704803 B CN 105704803B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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Abstract
The invention discloses a kind of downlink signal sending method and Remote Radio Unit, comprising: obtain the attenuator ATT gain initial value of radio frequency remote unit RRU, the ATT gain initial value is ATT gain scaled values set adjusted value plus third and value；After the RRU is powered on, downlink signal for the first time is carried out using the ATT gain initial value and is sent.Using scheme provided in an embodiment of the present invention, reduce the probability of the power amplifier damage of RRU.
Description
The application be on June 19th, 2012 application No. is 201210204112.X, the applying date, it is entitled " a kind of
The divisional application of downlink signal sending method and Remote Radio Unit ".
Technical field
The present invention relates to field of communication technology more particularly to a kind of downlink signal sending method and RRU (Radio Remote
Unit, Remote Radio Unit).
Background technique
It is higher and higher to the performance requirement of distributed base station with the development of wireless communication technique, correspondingly, to distribution
The requirement of the stability and reliability of RRU in base station is also higher and higher, wherein being even more important to the protection of the power amplifier of RRU.
In the prior art, before RRU factory, power of the meeting under a set temperature, when according to transmission downlink signal
It is required that the downlink gain of RRU is tested, using test result as the gain scaled values of the RRU, and in the downlink gain to the RRU
When carrying out initial configuration, the downlink gain initial value for configuring the RRU is corresponding gain scaled values, which can also be with
Referred to as calibration temperature.
However, actual temperature when powering on to the RRU is often inconsistent with calibration temperature when actually using RRU,
Due to temperature difference, transmission power when sending downlink signal using identical downlink gain is different, and temperature is higher, and power is bigger,
So when the RRU carries out the transmission of downlink signal using the gain scaled values, being compared when actual temperature is greater than calibration temperature
Downlink signal is sent under calibration temperature, is incited somebody to action so that transmission power moment increase is more, and then the power amplifier of RRU is caused to damage.
Summary of the invention
The embodiment of the present invention provides a kind of downlink signal sending method and Remote Radio Unit, to solve in the prior art
It is existing RRU is powered on after due to send power moment increase it is more lead to RRU power amplifier damage the problem of.
The embodiment of the present invention provides a kind of downlink signal sending method, comprising:
Gain initial value after the CFR (reduction of Crest Factor Reduction crest factor) of acquisition RRU, it is described
Gain scaled values subtract the difference of the first setting adjusted value after gain initial value is CFR after CFR；
After the RRU is powered on, downlink signal for the first time is carried out using gain initial value after the CFR and is sent.
The embodiment of the present invention also provides a kind of downlink signal sending method, comprising:
The attenuator ATT gain initial value of RRU is obtained, the ATT gain initial value is that ATT gain scaled values add third
Set adjusted value and value；
After the RRU is powered on, downlink signal for the first time is carried out using the ATT gain initial value and is sent.
The embodiment of the present invention also provides a kind of radio frequency remote unit RRU, comprising:
First acquisition unit, for obtain the RRU crest factor cut down CFR after gain initial value, the CFR it
Gain scaled values subtract the difference of the first setting adjusted value after gain initial value is CFR afterwards；
First transmission unit, for after the RRU is powered on, under being carried out for the first time using gain initial value after the CFR
Row signal is sent.
The embodiment of the present invention also provides a kind of radio frequency remote unit RRU, comprising:
Second acquisition unit, for obtaining the attenuator ATT gain initial value of the RRU, the ATT gain initial value is
ATT gain scaled values plus third setting adjusted value and value；
Second transmission unit, for carrying out downlink for the first time using the ATT gain initial value and believing after the RRU is powered on
Number send.
Beneficial effect of the present invention includes:
In method provided in an embodiment of the present invention, when carrying out downlink signal transmission using RRU, the CFR of RRU is obtained first
Gain initial value later, gain scaled values subtract the difference of the first setting adjusted value after gain initial value is CFR after the CFR
Value, and after RRU is powered on, downlink signal for the first time, which is carried out, using gain initial value after the CFR sends.Due to compared with prior art
It is middle using gain scaled values after CFR as initial value, gain initial value is smaller after the CFR of RRU in the embodiment of the present invention, institute
With, in the embodiment of the present invention when gain initial value carries out downlink signal transmission after using the CFR after powering on to RRU
Power is sent, less than carrying out downlink signal transmission using gain scaled values after CFR after powering on to RRU in the prior art
When transmission power, therefore, reduce power amplifier damage probability.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, is implemented with the present invention
Example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is one of the flow chart of downlink signal sending method provided in an embodiment of the present invention；
Fig. 2 is the flow chart for the downlink signal sending method that the embodiment of the present invention 1 provides；
Fig. 3 is the flow chart for the downlink signal sending method that the embodiment of the present invention 2 provides；
Fig. 4 is the flow chart for the downlink signal sending method that the embodiment of the present invention 3 provides；
Fig. 5 is the two of the flow chart of downlink signal sending method provided in an embodiment of the present invention；
Fig. 6 is the flow chart for the downlink signal sending method that the embodiment of the present invention 4 provides；
Fig. 7 is the structural schematic diagram for the Remote Radio Unit that the embodiment of the present invention 5 provides；
Fig. 8 is the structural schematic diagram for the Remote Radio Unit that the embodiment of the present invention 6 provides.
Specific embodiment
In order to provide the implementation for the power amplifier probability of damage for reducing RRU, the embodiment of the invention provides a kind of downlink letters
Number sending method and Remote Radio Unit, below in conjunction with Figure of description, preferred embodiment of the present invention will be described, should
Understand, preferred embodiments described herein are only used to illustrate and explain the present invention, is not intended to limit the present invention.And not
In the case where conflict, the features in the embodiments and the embodiments of the present application be can be combined with each other.
The embodiment of the present invention provides a kind of downlink signal sending method, as shown in Figure 1, specifically including:
Step 101 obtains gain initial value after the CFR of RRU, and gain is fixed after gain initial value is CFR after the CFR
Scale value subtracts the difference of the first setting adjusted value.
Step 102, after RRU is powered on, use after the CFR gain initial value carry out for the first time downlink signal send.
With reference to the accompanying drawing, method provided by the invention is described in detail with specific embodiment.
Embodiment 1:
Fig. 2 is the flow chart for the downlink signal sending method that the embodiment of the present invention 1 provides, wherein further comprising under transmission
During row signal, to the process flow that the downlink gain of RRU is adjusted, following processing step is specifically included:
Step 201 carries out initial configuration to the downlink gain of RRU.
It specifically may include the initial configuration of various downlink gains to RRU, wherein for the numeric field of RRU
Gain after CFR, when carrying out initial configuration, gain initial value is gain scaled values after CFR after configuring the CFR of RRU
Subtract the difference of the first setting adjusted value.
Wherein, which can carry out flexible setting according to actual needs, for example, according to the power amplifier of RRU
Self-characteristic be configured, if the ability to bear that power amplifier increases power moment is stronger, which can be with
What is be arranged is smaller, if the ability to bear that power amplifier increases power moment is weaker, the first setting adjusted value can be set compared with
Greatly；It can also be configured according to the temperature characterisitic of the use environment of RRU, if the temperature of use environment is determined compared to the RRU
Mark temperature increase it is less, the first setting adjusted value can be set it is smaller, if the temperature of use environment is determined compared to the RRU
It is more to mark temperature increase, which can be set larger.In the present embodiment 1, which can
To be set as 3dB.
In this step, various other downlink gains for RRU can carry out initial configuration, example using the prior art
Such as, it for gain initial value outside the ring of every carrier wave of RRU, can be configured using fixed value；For the DUC of RRU
(Digital Up Converter, Digital Up Convert) gain initial value can be configured using fixed value；For RRU's
The attenuator ATT gain initial value of analog domain can be configured using ATT gain scaled values.
Step 202, complete to the initial configuration of the downlink gain of RRU after, it can the RRU is powered on, and
The transmission that downlink signal is carried out using the RRU in this step, carries out downlink signal for the first time using gain initial value after the CFR
It sends.
In the present embodiment 1, during sending downlink signal, it is also based on gain after the current CFR of RRU, is adopted
Gain after the CFR of RRU is adjusted with the first setting gain adjustment mode, referring specifically to following step 203- step 208,
In the embodiment of the present invention, the gain adjustment stage of following step 203- step 208 is referred to as the automatic gain adjusting stage.
Step 203, when reaching in the first adjustment period, when determining that RRU sends downlink signal using gain after current CFR
Currently practical overall gain.Wherein, which can carry out flexible setting according to actual needs, for example, the present embodiment 1
In, which can be set to 1 second.
Specially determine the feedback power and forward power when RRU sends downlink signal using gain after current CFR, with
And gain temperature compensation value after CFR is determined according to calibration temperature and current actual temperature, then the currently practical overall gain of RRU is
Feedback power subtracts forward power along with the value after gain temperature compensation value after CFR.
Step 204, the calibration overall gain for obtaining the RRU, since gain is constant in the ring of RRU, so the calibration is total
Gain is determining, and the calibration overall gain of currently practical overall gain and acquisition based on RRU, determines gain error.
The gain error is specifically as follows the difference that calibration overall gain subtracts currently practical overall gain.
Gain after step 205, the CFR based on gain error adjustment RRU, specifically, first determining whether this in this step
Whether the absolute value of gain error reaches the first adjustment threshold value, if not up to, indicating that power control is met the requirements, entering step
203, i.e., gain after CFR is not adjusted, if reached, indicates that power control is unsatisfactory for requiring, enter step 206.
The first adjustment threshold value can carry out flexible setting according to actual needs, for example, in the present embodiment 1, first tune
Whole threshold value can be set to 0.5dB.
Step 206 judges the positive and negative of the gain error, when the gain error be timing, 207 are entered step, when the gain
When error is negative, 208 are entered step.
In this step, 207 can also be entered step, when sentencing when judging that the gain error is greater than the first adjustment threshold value
When the gain error of breaking is less than the negative value of the first adjustment threshold value, 208 are entered step.
Step 207 is positive when gain error, or when being greater than the first adjustment threshold value, indicates that currently practical overall gain is less than
Overall gain is calibrated, then adjusts gain after gain after the CFR of RRU is original CFR adds the gain error and value, then returns
Above-mentioned steps 203.
Step 208 is negative when gain error, or less than the first adjustment threshold value negative value when, indicate currently practical total increasing
Benefit is greater than calibration overall gain, then adjusts gain after gain after the CFR of RRU is original CFR and subtract the gain error absolute value
Then difference returns to above-mentioned steps 203.
It, can be successively in turn to each logical when RRU includes multiple channels in the above scheme that the embodiment of the present invention 1 provides
The downlink gain in road is adjusted, and matches for example, successively carrying out initialization to the downlink gain in each channel in turn by step 201
It sets, automatic gain control is successively then carried out to gain after the CFR in each channel in turn by step 203- step 208.
The above scheme provided using the embodiment of the present invention 1, due in the initial configuration of gain after carrying out CFR,
Gain scaled values are small after the CFR that gain initial value is configured compared to the prior art after the CFR configured, so, this hair
In bright embodiment 1 when gain initial value carries out downlink signal transmission after after powering on to RRU using the CFR of configuration
Power is sent, less than carrying out downlink signal transmission using gain scaled values after CFR after powering on to RRU in the prior art
When transmission power, therefore, reduce power amplifier damage probability.
Embodiment 2:
Fig. 3 is the flow chart for the downlink signal sending method that the embodiment of the present invention 2 provides, and specifically includes following processing step
It is rapid:
Step 301 carries out initial configuration to the downlink gain of RRU.
It specifically may include the initial configuration of various downlink gains to RRU, wherein for the numeric field of RRU
Gain after CFR, when carrying out initial configuration, gain initial value is gain scaled values after CFR after configuring the CFR of RRU
Subtract the difference of the first setting adjusted value.
Wherein, which can carry out flexible setting according to actual needs, for example, according to the power amplifier of RRU
Self-characteristic be configured, if the ability to bear that power amplifier increases power moment is stronger, which can be with
What is be arranged is smaller, if the ability to bear that power amplifier increases power moment is weaker, the first setting adjusted value can be set compared with
Greatly；It can also be configured according to the temperature characterisitic of the use environment of RRU, if the temperature of use environment is determined compared to the RRU
Mark temperature increase it is less, the first setting adjusted value can be set it is smaller, if the temperature of use environment is determined compared to the RRU
It is more to mark temperature increase, which can be set larger.In the present embodiment 2, which can
To be set as 3dB.
In this step, various other downlink gains for RRU can carry out initial configuration, example using the prior art
Such as, it for gain initial value outside the ring of every carrier wave of RRU, can be configured using fixed value；For at the beginning of the DUC gain of RRU
Initial value can be configured using fixed value；For the attenuator ATT gain initial value of the analog domain of RRU, ATT can be used
Gain scaled values are configured.
Step 302, complete to the initial configuration of the downlink gain of RRU after, it can the RRU is powered on, and
The transmission that downlink signal is carried out using the RRU in this step, carries out downlink signal for the first time using gain initial value after the CFR
It sends.
In the present embodiment 2, during sending downlink signal, it is also based on gain after the current CFR of RRU, is adopted
Gain after the CFR of RRU is adjusted with the first setting gain adjustment mode, referring specifically to following step 303- step 307,
In the embodiment of the present invention, the gain adjustment stage of following step 303- step 306 is referred to as the asymptotic gain property adjusting stage.
Step 303, the second adjustment period reach when, judge RRU DPD (Digital Pre-Distortion, number
Predistortion) whether state be open state, if it is open state, 304 are entered step, if be in off state, is returned
This step 303.Wherein, which can carry out flexible setting according to actual needs, for example, this in the present embodiment 2
Two adjustment periods can be set to 500 milliseconds.
Step 304, adjust RRU current CFR after gain be original CFR after gain plus second set adjusted value sum
Value, this second setting adjusted value be less than it is above-mentioned first setting adjusted value, specifically, can be set above-mentioned first set adjusted value as
The integral multiple of the second setting adjusted value, for example, when first sets adjusted value as 3dB, which can be
0.5dB。
Step 305, the DPD for starting RRU carry out to processing is cut the downlink signal by RRU to cutting function, specifically can be with
Using quickly to cutting function.
In this step, when DPD to cut handle successfully after, that is, 306 are entered step, if not successfully, continuing DPD pairs
Processing is cut, until after the DPD for carrying out setting number is to processing is cut, regardless of whether success, enters step 306, the setting is secondary
Number can carry out flexible setting according to actual needs, for example, being set as 2 times.
Step 306 judges whether gain after the current CFR of RRU reaches gain scaled values after the CFR of RRU, if reached
It arrives, enters step 307, if not up to, return step 303.
Above-mentioned steps 303- step 306 be the asymptotic gain property adjusting stage, complete the stage gain adjustment after, i.e., into
Enter the automatic gain adjusting stage of subsequent step 307.
Step 307, this step are step 203- step 208 phase in automatic gain adjusting stage, with above-described embodiment 1
Together, it is no longer described in detail herein.
It, can be successively in turn to each logical when RRU includes multiple channels in the above scheme that the embodiment of the present invention 2 provides
The downlink gain in road is adjusted, and matches for example, successively carrying out initialization to the downlink gain in each channel in turn by step 301
It sets, asymptotic gain property adjusting is successively then carried out to gain after the CFR in each channel in turn by step 303- step 306, then so
Automatic gain control is successively carried out to gain after the CFR in each channel in turn by step 307 afterwards.
Using the embodiment of the present invention 2 provide above scheme, compared with prior art, except reduce power amplifier damage probability it
Outside, since when carrying out DPD to processing is cut, gain is smaller compared with prior art after the CFR of RRU, so carrying out DPD to cutting place
The effect of reason is more preferable, so as to faster make the downlink signal sent meet the spectral emission template of RRU.
Embodiment 3:
Fig. 4 is the flow chart for the downlink signal sending method that the embodiment of the present invention 3 provides, and specifically includes following processing step
It is rapid:
Step 401 carries out initial configuration to the downlink gain of RRU.
It specifically may include the initial configuration of various downlink gains to RRU, wherein for the numeric field of RRU
Gain after CFR, when carrying out initial configuration, gain initial value is gain scaled values after CFR after configuring the CFR of RRU
Subtract the difference of the first setting adjusted value.
Wherein, which can carry out flexible setting according to actual needs, for example, according to the power amplifier of RRU
Self-characteristic be configured, if the ability to bear that power amplifier increases power moment is stronger, which can be with
What is be arranged is smaller, if the ability to bear that power amplifier increases power moment is weaker, the first setting adjusted value can be set compared with
Greatly；It can also be configured according to the temperature characterisitic of the use environment of RRU, if the temperature of use environment is determined compared to the RRU
Mark temperature increase it is less, the first setting adjusted value can be set it is smaller, if the temperature of use environment is determined compared to the RRU
It is more to mark temperature increase, which can be set larger.In the present embodiment 2, which can
To be set as 3dB.
For the ATT gain of the analog domain of RRU, when carrying out initial configuration, the ATT gain initial value for configuring RRU is
ATT gain scaled values plus third setting adjusted value and value.
Wherein, third setting adjusted value can carry out flexible setting according to actual needs, for example, according to the power amplifier of RRU
Self-characteristic be configured, if the ability to bear that power amplifier increases power moment is stronger, which sets adjusted value can be with
What is be arranged is smaller, if the ability to bear that power amplifier increases power moment is weaker, third setting adjusted value can be set compared with
Greatly；It can also be configured according to the temperature characterisitic of the use environment of RRU, if the temperature of use environment is determined compared to the RRU
Mark temperature increase it is less, third setting adjusted value can be set it is smaller, if the temperature of use environment is determined compared to the RRU
It is more to mark temperature increase, third setting adjusted value can be set larger.In the present embodiment 3, which sets adjusted value can
To be set as 3dB.
In this step, various other downlink gains for RRU can carry out initial configuration, example using the prior art
Such as, it for gain initial value outside the ring of every carrier wave of RRU, can be configured using fixed value；For at the beginning of the DUC gain of RRU
Initial value can be configured using fixed value.
Step 402, complete to the initial configuration of the downlink gain of RRU after, it can the RRU is powered on, and
The transmission that downlink signal is carried out using the RRU in this step, uses gain initial value after the CFR and the ATT gain initial value
Downlink signal for the first time is carried out to send.
In the present embodiment 3, during sending downlink signal, it can also be primarily based on the current ATT gain of RRU, adopted
The ATT gain of RRU is adjusted with the second setting gain adjustment mode, referring specifically to following step 403- step 408, this hair
In bright embodiment, the gain adjustment stage of following step 403- step 408 is referred to as the analog domain adjusting stage.
Step 403 determines currently practical overall gain of the RRU using current ATT gain transmission downlink signal when.
Specially determine the feedback power and forward power when RRU sends downlink signal using current ATT gain, Yi Jigen
ATT gain temperature compensation value is determined according to calibration temperature and current actual temperature, then the currently practical overall gain of RRU, be feedback power
Forward power is subtracted along with the value after ATT gain temperature compensation value.
First is subtracted due in above-mentioned steps 401, configuring gain scaled values after gain after the CFR of RRU is CFR to set
Determine the difference of adjusted value, so, in this step, determine RRU send downlink signal feedback power when, can based on this first
Setting adjusted value is adjusted, that is, determines that above-mentioned feedback power is that the actual feedback power detected is adjusted plus first setting
Be worth and value.
Step 404, the calibration overall gain for obtaining the RRU, since gain is constant in the ring of RRU, so the calibration is total
Gain is determining, and the calibration overall gain of currently practical overall gain and acquisition based on RRU, determines gain error.
The gain error is specifically as follows the difference that calibration overall gain subtracts currently practical overall gain.
Step 405, the ATT gain based on gain error adjustment RRU, specifically, first determining whether the gain in this step
Whether error is not less than 0, and is not more than second adjustment threshold value, if so, indicating that power control is met the requirements, i.e., does not increase to ATT
Benefit is adjusted, and enters step 409, starts the adjustment of gain after the CFR to RRU, if not, indicating that power control is discontented
Foot requires, and enters step 406.
The second adjustment threshold value can carry out flexible setting according to actual needs, for example, in the present embodiment 3, second tune
Whole threshold value can be set to 1dB.
Step 406 judges the positive and negative of the gain error, when the gain error be timing, 407 are entered step, when the gain
When error is negative, 408 are entered step.
In this step, 407 can also be entered step, when sentencing when judging that the gain error is greater than the second adjustment threshold value
When breaking the gain error less than 0,408 are entered step.
Step 407 is positive when gain error, or when being greater than the second adjustment threshold value, indicates that currently practical overall gain is less than
Overall gain is calibrated, then adjusts the difference that the ATT gain of RRU subtracts the gain error for original ATT gain.
Step 408 is negative when gain error, or less than the second adjustment threshold value negative value when, indicate currently practical total increasing
Benefit be greater than calibration overall gain, then adjust RRU ATT gain be original ATT gain add the gain error absolute value and value.
Gain after step 409, the current CFR based on RRU, using the first setting gain adjustment mode to the CFR of RRU it
Gain is adjusted afterwards, can be specifically adjusted, can also be used using the step 203- step 208 in above-described embodiment 1
Step 303- step 307 in above-described embodiment 2 is adjusted, and is no longer described in detail herein.
It, can be successively in turn to each logical when RRU includes multiple channels in the above scheme that the embodiment of the present invention 3 provides
The downlink gain in road is adjusted, and matches for example, successively carrying out initialization to the downlink gain in each channel in turn by step 401
It sets, analog domain adjusting is successively then carried out to the ATT gain in each channel in turn by step 403- step 308, is subsequently passed through
Step 409 is successively in turn adjusted gain after the CFR in each channel.
The above scheme provided using the embodiment of the present invention 3, compared with prior art, except the ATT gain and CFR for passing through RRU
The initial configuration scheme of gain later reduces except the probability that power amplifier damages, and the mould of ATT gain is directed to due to further comprising
The near-field adjusting stage can further prevent because of DAC (Digital-to-Analog Converter, digital-to-analogue conversion
Device) overflow cause power amplifier to damage.
The embodiment of the present invention also provides a kind of downlink signal sending method, as shown in figure 5, specifically including:
Step 501, the ATT gain initial value for obtaining RRU, the ATT gain initial value are that ATT gain scaled values add third
Set adjusted value and value.
Step 502, after RRU is powered on, use the ATT gain initial value carry out for the first time downlink signal send.
With reference to the accompanying drawing, method provided by the invention is described in detail with specific embodiment.
Embodiment 4:
Fig. 6 is the flow chart for the downlink signal sending method that the embodiment of the present invention 4 provides, and specifically includes following processing step
It is rapid:
Step 601 carries out initial configuration to the downlink gain of RRU.
It specifically may include the initial configuration of various downlink gains to RRU, wherein for the analog domain of RRU
ATT gain, when carrying out initial configuration, the ATT gain initial value for configuring RRU is that ATT gain scaled values are set plus third
Adjusted value and value.
Wherein, third setting adjusted value can carry out flexible setting according to actual needs, for example, according to the power amplifier of RRU
Self-characteristic be configured, if the ability to bear that power amplifier increases power moment is stronger, which sets adjusted value can be with
What is be arranged is smaller, if the ability to bear that power amplifier increases power moment is weaker, third setting adjusted value can be set compared with
Greatly；It can also be configured according to the temperature characterisitic of the use environment of RRU, if the temperature of use environment is determined compared to the RRU
Mark temperature increase it is less, third setting adjusted value can be set it is smaller, if the temperature of use environment is determined compared to the RRU
It is more to mark temperature increase, third setting adjusted value can be set larger.In the present embodiment 4, which sets adjusted value can
To be set as 3dB.
In this step, various other downlink gains for RRU can carry out initial configuration, example using the prior art
Such as, it for gain initial value outside the ring of every carrier wave of RRU, can be configured using fixed value；For at the beginning of the DUC gain of RRU
Initial value can be configured using fixed value；It, can be fixed using gain after CFR for gain initial value after the CFR of RRU
Scale value is configured.
Step 602, complete to the initial configuration of the downlink gain of RRU after, it can the RRU is powered on, and
The transmission that downlink signal is carried out using the RRU in this step, is used the ATT gain initial value to carry out downlink signal for the first time and sent.
In the present embodiment 4, during sending downlink signal, it is also based on the current ATT gain of RRU, using
The ATT gain of RRU is adjusted in two setting gain adjustment modes, and referring specifically to following step 603- step 608, the present invention is real
It applies in example, the gain adjustment stage of following step 603- step 608 is referred to as the analog domain adjusting stage.
Step 603 determines currently practical overall gain of the RRU using current ATT gain transmission downlink signal when.
Specially determine the feedback power and forward power when RRU sends downlink signal using current ATT gain, Yi Jigen
ATT gain temperature compensation value is determined according to calibration temperature and current actual temperature, then the currently practical overall gain of RRU, be feedback power
Forward power is subtracted along with the value after ATT gain temperature compensation value.
Step 604, the calibration overall gain for obtaining the RRU, since gain is constant in the ring of RRU, so the calibration is total
Gain is determining, and the calibration overall gain of currently practical overall gain and acquisition based on RRU, determines gain error.
The gain error is specifically as follows the difference that calibration overall gain subtracts currently practical overall gain.
Step 605, the ATT gain based on gain error adjustment RRU, specifically, first determining whether the gain in this step
Whether error is not less than 0, and is not more than second adjustment threshold value, if so, indicating that power control is met the requirements, enters step 609,
If not, indicating that power control is unsatisfactory for requiring, 606 are entered step.
The second adjustment threshold value can carry out flexible setting according to actual needs, for example, in the present embodiment 4, second tune
Whole threshold value can be set to 1dB.
Step 606 judges the positive and negative of the gain error, when the gain error be timing, 607 are entered step, when the gain
When error is negative, 608 are entered step.
In this step, 607 can also be entered step, when sentencing when judging that the gain error is greater than the second adjustment threshold value
When breaking the gain error less than 0,608 are entered step.
Step 607 is positive when gain error, or when being greater than the second adjustment threshold value, indicates that currently practical overall gain is less than
Overall gain is calibrated, then adjusts the difference that the ATT gain of RRU subtracts the gain error for original ATT gain.
Step 608 is negative when gain error, or less than the second adjustment threshold value negative value when, indicate currently practical total increasing
Benefit be greater than calibration overall gain, then adjust RRU ATT gain be original ATT gain add the gain error and value.
Step 609 is not adjusted ATT gain, the gain adjustment processing of end simulation domain adjusting stage.
The above scheme provided using the embodiment of the present invention 4, due to being matched when carrying out the initial configuration of ATT gain
The ATT gain scaled values that the ATT gain initial value set is configured compared to the prior art are big, and since ATT gain is bigger, to letter
Number carry out attenuation processing after carry out downlink signal transmission when transmission power it is smaller, so, to RRU in the embodiment of the present invention 4
The ATT gain initial value after being powered on using configuration carries out transmission power when downlink signal transmission, is less than the prior art
In after being powered on to RRU use ATT gain scaled values carry out downlink signal transmission when transmission power therefore reduce
The probability of power amplifier damage, and by adjusting of the analog domain adjusting stage to ATT gain, it can further prevent from overflowing because of DAC
Power amplifier is caused to damage out.
Embodiment 5:
Based on the same inventive concept, the downlink signal sending method provided according to that above embodiment of the present invention, correspondingly, this
Inventive embodiments 5 additionally provide a kind of Remote Radio Unit, and structural schematic diagram is as shown in fig. 7, specifically include:
First acquisition unit 701, the crest factor for obtaining the RRU cuts down gain initial value after CFR, described
Gain scaled values subtract the difference of the first setting adjusted value after gain initial value is CFR after CFR；
First transmission unit 702, for being carried out for the first time using gain initial value after the CFR after the RRU is powered on
Downlink signal is sent.
Further, further includes:
First adjusts unit 703, for first transmission unit 702 using gain initial value after the CFR into
After row downlink signal transmission for the first time, the currently practical overall gain when RRU sends downlink signal is determined；And worked as based on described
Preceding real total gain and the calibration overall gain of the RRU determine gain error；And the RRU is adjusted based on the gain error
CFR after gain.
Further, first unit 703 is adjusted, be also used to currently practical when determining that the RRU sends downlink signal
Before overall gain, gain after the CFR of the RRU is adjusted by circulation execution following steps A and step B, until the RRU's
Gain is gain scaled values after the CFR after CFR:
Step A, when the digital pre-distortion DPD state of the RRU is open state, increasing after the CFR of the RRU is adjusted
Benefit be original CFR after gain plus second setting adjusted value and value, it is described second setting adjusted value be less than it is described first sets
Adjusted value；
Step B, start the DPD of the RRU to cutting function.
Further, first acquisition unit 701 are also used to increase after first transmission unit 702 is using the CFR
Before beneficial initial value carries out downlink signal transmission for the first time, the attenuator ATT gain initial value of the RRU, the ATT gain are obtained
Initial value be ATT gain scaled values plus third set adjusted value and value；
First transmission unit 702 is specifically used for using gain initial value and the ATT gain initial value after the CFR
Downlink signal for the first time is carried out to send.
Further, further includes:
Second adjusts unit 704, for using gain initial value after the CFR and described in first transmission unit
After ATT gain initial value carries out downlink signal transmission for the first time, currently practical total increasing when the RRU sends downlink signal is determined
Benefit；And gain error is determined based on the calibration overall gain of the currently practical overall gain and the RRU；And it is based on the gain
The ATT gain of RRU described in error transfer factor.
Embodiment 6:
Based on the same inventive concept, the downlink signal sending method provided according to that above embodiment of the present invention, correspondingly, this
Inventive embodiments 6 additionally provide a kind of Remote Radio Unit, and structural schematic diagram is as shown in figure 8, specifically include:
Second acquisition unit 801, for obtaining the attenuator ATT gain initial value of the RRU, the ATT gain is initial
Value be ATT gain scaled values plus third set adjusted value and value；
Second transmission unit 802, for carrying out downlink for the first time using the ATT gain initial value after the RRU is powered on
Signal is sent.
Further, further includes:
Third adjusts unit 803, for carrying out head using the ATT gain initial value in second transmission unit 802
After secondary downlink signal is sent, the currently practical overall gain when RRU sends downlink signal is determined；And it is based on the current reality
Border overall gain and the calibration overall gain of the RRU determine gain error；And adjust the RRU's based on the gain error
ATT gain.
The function of each unit can correspond to the respective handling step in process shown in Fig. 1 to Fig. 6 in above-described embodiment 5 and 6,
Details are not described herein.
In conclusion scheme provided in an embodiment of the present invention, comprising: obtain gain initial value after the CFR of RRU, the CFR
Gain scaled values subtract the difference of the first setting adjusted value after gain initial value is CFR later；And after RRU is powered on, use
Gain initial value carries out downlink signal transmission for the first time after the CFR.Using scheme provided in an embodiment of the present invention, reduce RRU
Power amplifier damage probability.
Regulating device provided by embodiments herein can be realized by a computer program.Those skilled in the art should
It is understood that above-mentioned module division mode is only one of numerous module division modes, if be divided into other modules or
Not division module all should be within the scope of protection of this application as long as regulating device has above-mentioned function.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (2)
1. a kind of downlink signal sending method characterized by comprising
The attenuator ATT gain initial value of radio frequency remote unit RRU is obtained, the ATT gain initial value is ATT gain scaled values
In addition third setting adjusted value and value；
After the RRU is powered on, downlink signal for the first time is carried out using the ATT gain initial value and is sent；
Determine the currently practical overall gain when RRU sends downlink signal；
Gain error is determined based on the calibration overall gain of the currently practical overall gain and the RRU；
The ATT gain of the RRU is adjusted based on the gain error.
2. a kind of radio frequency remote unit RRU characterized by comprising
Second acquisition unit, for obtaining the attenuator ATT gain initial value of the RRU, the ATT gain initial value is ATT
Gain scaled values plus third setting adjusted value and value；
Second transmission unit, for carrying out downlink signal for the first time using the ATT gain initial value and sending out after the RRU is powered on
It send；
Third adjusts unit, for carrying out downlink signal for the first time using the ATT gain initial value in second transmission unit
After transmission, the currently practical overall gain when RRU sends downlink signal is determined；And based on the currently practical overall gain and
The calibration overall gain of the RRU determines gain error；And the ATT gain of the RRU is adjusted based on the gain error.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610151559.3A CN105704803B (en) | 2012-06-19 | 2012-06-19 | A kind of downlink signal sending method and Remote Radio Unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210204112.XA CN103517391B (en) | 2012-06-19 | 2012-06-19 | Downlink signal sending method and radio remote unit |
| CN201610151559.3A CN105704803B (en) | 2012-06-19 | 2012-06-19 | A kind of downlink signal sending method and Remote Radio Unit |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210204112.XA Division CN103517391B (en) | 2012-06-19 | 2012-06-19 | Downlink signal sending method and radio remote unit |
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| CN105704803A CN105704803A (en) | 2016-06-22 |
| CN105704803B true CN105704803B (en) | 2019-02-26 |
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| CN201210204112.XA Expired - Fee Related CN103517391B (en) | 2012-06-19 | 2012-06-19 | Downlink signal sending method and radio remote unit |
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| CN109088681B (en) * | 2018-10-23 | 2021-10-29 | Oppo（重庆）智能科技有限公司 | Method for determining initial gain of WiFi module, electronic device and computer-readable storage medium |
| CN111818627B (en) * | 2020-07-24 | 2022-07-08 | 成都爱瑞无线科技有限公司 | Dynamically adjusted downlink originating calibration method |
| CN114567391B (en) * | 2022-03-10 | 2023-07-11 | 四川恒湾科技有限公司 | Self-calibration method for downlink gain of remote radio unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257331A (en) * | 2008-03-20 | 2008-09-03 | 华为技术有限公司 | A Gain Automatic Calibration Method and Transmitter |
| CN102231906A (en) * | 2011-06-22 | 2011-11-02 | 中兴通讯股份有限公司 | Gain control method and radio remote unit (RRU) |
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| CN100574492C (en) * | 2007-07-20 | 2009-12-23 | 中兴通讯股份有限公司 | A kind of devices and methods therefor of network enabled structure online recombination |
| CN102065531B (en) * | 2009-11-13 | 2014-06-11 | 中兴通讯股份有限公司 | Power calibrating method and device |
| JP5761646B2 (en) * | 2009-12-21 | 2015-08-12 | ダリ システムズ カンパニー リミテッド | System and method for modulation agnostic digital hybrid mode power amplifier |
| CN101969423A (en) * | 2010-10-13 | 2011-02-09 | 新邮通信设备有限公司 | Method and device for reducing peak factors and remote radio system |
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2012
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257331A (en) * | 2008-03-20 | 2008-09-03 | 华为技术有限公司 | A Gain Automatic Calibration Method and Transmitter |
| CN102231906A (en) * | 2011-06-22 | 2011-11-02 | 中兴通讯股份有限公司 | Gain control method and radio remote unit (RRU) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105704803A (en) | 2016-06-22 |
| CN103517391A (en) | 2014-01-15 |
| CN103517391B (en) | 2017-05-24 |
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Address after: 510663 No.10, Shenzhou Road, Guangzhou Science City, economic and Technological Development Zone, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 No.10, Shenzhou Road, Guangzhou Science City, economic and Technological Development Zone, Huangpu District, Guangzhou City, Guangdong Province Patentee before: Comba Telecom System (China) Ltd. |