JP2003143071A - Transmission power controlling apparatus and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set appropriate target receiving quality, even when the fluctuations in reception quality is large. SOLUTION: On the basis of data quality (BLER) measured by a data quality measuring part 7, a target-receiving quality setting part 11 increases target- receiving quality by a prescribed value (Δup ) in the same manner as that in the conventional method, when errors exist in a block. When error does not exist in the block, the setting part 11 decreases the target-receiving quality by the other prescribed value (Δdown ), thereby obtaining the target receiving quality before correction. To the obtained target receiving quality prior to correction, correction is performed on the basis of receiving quality fluctuation (dispersion) measured by a receiving quality fluctuation measuring part 9, and the target-receiving quality after correction is outputted to a transmitting power control command producing part 13. Actual correction values are previously set by making fluctuation (dispersion) of receiving quality a parameter and are stored in the target-receiving quality setting part 11.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a CDMA (Code D
The present invention relates to a transmission power control apparatus and method in a mobile communication system using an ivision multiple access (code division multiple access) method.

[0002]

2. Description of the Related Art In a mobile communication system using a CDMA system, a signal of one user interferes with other users. Therefore, transmission power control for controlling the transmission power of communication between users to a necessary minimum is required. It is used.

This is to set a target value of the reception quality (target reception quality), measure the reception quality for a short period of time, and increase the transmission power if the measured value of the reception quality is smaller than the target value. Realized by so-called closed-loop transmission power control, which performs high-speed transmission power control by sending a control command to reduce the transmission power to the communication partner together with other data when the measured reception quality value is larger than the target value. To be done.

However, since the optimum target reception quality changes depending on the surrounding environment (propagation environment), it is necessary to control the target reception quality. This control is called "outer loop transmission power control". In the outer loop transmission power control, the target reception quality is controlled by a data quality such as an error in the reception data in a cycle longer than that in the closed loop.

As a method of this outer loop transmission power control, for example, the method described in 1999 IEICE General Conference B-5-145 "Outer loop algorithm of transmission power control in CDMA cellular system" is known. ing. FIG. 13 is a block diagram showing a configuration of a conventional transmission power control device.

In FIG. 13, the signal from the communication partner is
After being received by the antenna 101, it is demodulated by the receiving unit 103. Then, using the demodulation result of the receiving unit 103, the reception quality measuring unit 105 uses the signal-to-interference ratio (SIR: Signal t
o Measure the reception quality such as Interference Ratio). At the same time as measuring the reception quality, the data quality measuring unit 107
Then, the quality of the demodulated data is measured, and based on this measurement result, the target reception quality setting section 109 sets the target reception quality that satisfies the desired data quality.

Here, the quality of data is determined by detecting an error for each unit of received data (for example, a “block” consisting of a group of records in a logical unit of data) by a technique such as an error detection code, and detecting the error. , That is, the error rate of the data block (BLER: BLock Error
Rate). The required data quality level, that is, the required BLER differs depending on the type of service.

There are several possible methods for determining the target reception quality for satisfying the required BLER (target BLER). For example, the BLER is obtained by dividing the number of errors in a data block of sufficient length by the observed block length. Therefore, the obtained BLE
If R is smaller than the required value, the target reception quality is increased by a predetermined value (Δ), and if the obtained BLER is larger than the required value, the target reception quality is decreased by the same predetermined value (Δ). A method of making it possible is considered (so-called periodic control method).

Further, as a method can converge more quickly to the appropriate target reception quality, check for errors in each block, increased by a predetermined value (delta _{Stay up-)} the target reception quality when there is an error in the block Then, if there is no error in the block, a method of reducing the target reception quality by another predetermined value (Δ _down ) may be considered (so-called immediate control method). At this time, if the relationship between Δ _up and Δ _down is expressed by the following (Formula 1), Δ _up × target BLER = Δ _down × (1-target BLER) (Formula 1), 1 / BLER times on average Since the target reception quality can be controlled so that an error occurs once every 1, the desired BLER can be achieved as a result. Since the immediate control method is superior to the periodic control method as concluded in the above-mentioned document, the case of using the immediate control method will be described below as an example.

After that, the transmission power control command generator 11
1 is a case where the target reception quality set by the target reception quality setting unit 109 by the above method is compared with the reception quality measured by the reception quality measuring unit 105, and the measured reception quality is lower than the target reception quality. Generates a transmission power control command (hereinafter simply referred to as “control command”) that increases the transmission power and decreases the transmission power when the measured reception quality is higher than the target reception quality, and outputs the transmission power control command to the transmission unit 113. Then, the transmission unit 113 modulates the control command output from the transmission power control command generation unit 111 together with other data, and wirelessly transmits the modulated control command via the antenna 101.

[0011]

However, in the above-mentioned conventional transmission power control (immediate control method), the target reception quality is updated for each unit (block) of received data, so that, for example, fading or shadowing, When the fluctuation of the reception quality becomes large due to the fluctuation of the number of paths, it is not possible to set the appropriate target reception quality to satisfy the desired data quality (deterioration of convergence), and it is stable and appropriate. There is a problem that it is not possible to perform various transmission power control.

Further, in the above-described conventional transmission power control (immediate control method), the target reception quality is updated for each unit (block) of received data, so that the condition of the reception state becomes locally poor. As a result, when errors continuously occur, an excessive target reception quality is set, and particularly when the target BLER is small, it takes a long time to reduce the target reception quality (long convergence time). was there.

Further, in the above-mentioned conventional transmission power control (immediate control method), the target reception quality is updated for each unit (block) of received data, so that, for example, a section (time) in which the propagation path is in a steady state. When the number of data blocks fluctuates with time, such as when packet communication is short, the advantage of the immediate control method (desired data quality can be obtained on average in the long section) cannot be utilized. There is a problem that an error occurs between the average data quality of 1 and the desired data quality (offset at the time of convergence).

Further, in the above-mentioned conventional transmission power control (immediate control method), the target reception quality is updated for each unit (block) of received data. Therefore, for example, a service for intermittently receiving data such as packet communication. In the case of, there is a problem that an inappropriate target reception quality may be set depending on the control method when there is no data.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a transmission power control apparatus and method capable of setting an appropriate target reception quality even when there is a large variation in reception quality. And

It is another object of the present invention to provide a transmission power control apparatus and method capable of quickly converging the target reception quality even when errors occur continuously.

Further, according to the present invention, even when the steady section of the propagation path is short, or when the number of data blocks varies with time such as in packet communication, by setting an appropriate target reception quality, an actual average reception quality can be obtained. An object of the present invention is to provide a transmission power control device and method capable of reducing an error between a desired data quality and a desired data quality.

Another object of the present invention is to provide a transmission power control apparatus and method capable of setting an appropriate target reception quality even when receiving data intermittently as in packet communication.

[0019]

(1) A transmission power control apparatus according to the present invention comprises reception quality measuring means for measuring reception quality,
Data quality measuring means for measuring the quality of received data, reception quality fluctuation measuring means for measuring fluctuations in reception quality measured by the reception quality measuring means, and data quality measured by the data quality measuring means, and Target reception quality setting means for setting the target reception quality based on the reception quality fluctuation measured by the reception quality fluctuation measuring means, and the reception quality measured by the reception quality measuring means and the target reception quality setting means. And a command generation unit that generates a transmission power control command based on the target reception quality.

According to this configuration, the fluctuation of the reception quality is measured, and the target reception quality is set by adding the measured value (the fluctuation of the reception quality), that is, the target reception quality is set based on the fluctuation of the reception quality. Since the correction is performed, an appropriate target reception quality can be set and stable and appropriate transmission power control can be performed even when there is a large variation in reception quality.

(2) The transmission power control apparatus of the present invention comprises a reception quality measuring means for measuring reception quality, a data quality measuring means for measuring quality of received data, and a path information detecting means for detecting path information. A path information variation measuring means for measuring a variation of the path information detected by the path information detecting means, a data quality measured by the data quality measuring means and a path information variation measured by the path information variation measuring means. Target reception quality setting means for setting a target reception quality based on the above, and a transmission power control command is generated based on the reception quality measured by the reception quality measuring means and the target reception quality set by the target reception quality setting means. And a command generating means for performing the configuration.

According to this configuration, the fluctuation of the path information is measured, and the target reception quality is set by adding the measured value (the fluctuation of the path information), that is, the target reception quality is set based on the fluctuation of the path information. Since the correction is performed, an appropriate target reception quality can be set and stable and appropriate transmission power control can be performed even when there is a large variation in reception quality. It is possible to perform stable and appropriate transmission power control regardless of the magnitude of fluctuations in reception quality.

(3) The transmission power control apparatus according to the present invention comprises a reception quality measuring means for measuring the reception quality, a data quality measuring means for measuring the quality of the received data, and the data quality measuring means. Target reception quality control range setting means for setting a target reception quality control range based on data quality, and a target for setting a target reception quality control range based on the target reception quality control range set by the target reception quality control range setting means. And a command generation unit that generates a transmission power control command based on the reception quality measured by the reception quality measurement unit and the target reception quality set by the target reception quality setting unit. take.

According to this configuration, the data quality is measured,
Based on this measurement value (data quality), the control width of the target reception quality is set (for example, as the control width of the target reception quality, the reduction width is first increased and then the reduction width is gradually decreased), that is, , Since the target reception quality control width of each time is made variable, even if errors occur continuously,
The target reception quality can be quickly converged, and the transmission power can be reduced.

(4) In the transmission power control apparatus of the present invention, the reception quality measuring means for measuring the reception quality, the data quality measuring means for measuring the quality of the received data, and the data quality measuring means are used. Data error monitoring means for monitoring data errors based on data quality and generating information for suppressing control of target reception quality, and data quality measured by the data quality measuring means and generated by the data error monitoring means Target reception quality setting means for setting the target reception quality based on the target reception quality control suppression information, the reception quality measured by the reception quality measuring means and the target reception quality set by the target reception quality setting means. Command generation means for generating a transmission power control command based on the above.

According to this configuration, the data quality is measured,
Data error is monitored based on this measurement value (data quality) to generate target reception quality control suppression information (for example,
If errors occur continuously, updating of the target reception quality is suppressed), so it is possible to suppress the setting of the excessive target reception quality due to local deterioration of the reception state, and excessive transmission power control. Can be suppressed.

(5) In the transmission power control apparatus of the present invention, the reception quality measuring means for measuring the reception quality, the data quality measuring means for measuring the quality of the received data, and the data quality measuring means. Long section data quality information measuring means for measuring data quality information in a long section based on data quality, data quality measured by the data quality measuring means and long section measured by the long section data quality information measuring means Target reception quality setting means for setting a target reception quality based on data quality information, and transmission power control based on the reception quality measured by the reception quality measuring means and the target reception quality set by the target reception quality setting means. And a command generating means for generating a command.

According to this configuration, the data quality information in the long section is measured, and the target reception quality is set in consideration of this measurement value (long section data quality information), that is, the long section data quality information (long section). Average data quality and error occurrence tendency in the section)
Since the target reception quality is corrected based on, the average data quality and the desired data quality can be set even when the steady section of the propagation path is short or when the number of data blocks varies with time like packet communication. The error can be reduced.

(6) In the transmission power control apparatus of the present invention, the reception quality measuring means for measuring the reception quality, the data quality measuring means for measuring the quality of the received data, and the data quality measuring means are used for the measurement. Based on data quality
Target reception quality control range setting means for setting a target reception quality control range when data is not received, and a target for setting a target reception quality based on the target reception quality control range set by the target reception quality control range setting means. And a command generation unit that generates a transmission power control command based on the reception quality measured by the reception quality measurement unit and the target reception quality set by the target reception quality setting unit. take.

According to this configuration, the data quality is measured,
Based on this measurement value (data quality), set the control range of the target reception quality when data is not received (for example, set a threshold and lower the target reception quality below the threshold while data is not being received. Therefore, even when data is intermittently received as in packet communication, an appropriate target reception quality can be set.

(7) The base station apparatus of the present invention has a configuration including the transmission power control apparatus described in any of the above.

With this configuration, it is possible to provide a base station device having the same effects as the above.

(8) The mobile station apparatus of the present invention has a configuration having the transmission power control apparatus described in any of the above.

With this configuration, it is possible to provide a mobile station apparatus having the same effects as the above.

(9) In the transmission power control method of the present invention, the reception quality measuring step of measuring the reception quality, the data quality measuring step of measuring the quality of the received data, and the reception measured in the reception quality measuring step. Receiving quality variation measuring step for measuring quality variation, and target receiving quality setting step for setting a target receiving quality based on the data quality measured in the data quality measuring step and the receiving quality variation measured in the receiving quality variation measuring step And a command generation step of generating a transmission power control command based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step.

According to this method, the variation of the reception quality is measured, and the target reception quality is set by adding the measured value (variation of the reception quality), that is, the target reception quality is determined based on the variation of the reception quality. Since the correction is performed, an appropriate target reception quality can be set and stable and appropriate transmission power control can be performed even when there is a large variation in reception quality.

(10) In the transmission power control method of the present invention, a reception quality measuring step of measuring reception quality, a data quality measuring step of measuring quality of received data, and a path information detecting step of detecting path information. A path information variation measuring step for measuring the variation of the path information detected in the path information detecting step, based on the data quality measured in the data quality measuring step and the path information variation measured in the path information variation measuring step. A target reception quality setting means for setting a target reception quality; a command generation step for generating a transmission power control command based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step; , Have.

According to this method, the variation of the path information is measured, and the target reception quality is set in consideration of this measurement value (the variation of the path information), that is, the target reception quality is determined based on the variation of the path information. Since the correction is performed, an appropriate target reception quality can be set and stable and appropriate transmission power control can be performed even when there is a large variation in reception quality. It is possible to perform stable and appropriate transmission power control regardless of the magnitude of fluctuations in reception quality.

(11) In the transmission power control method of the present invention, the reception quality measuring step for measuring the reception quality, the data quality measuring step for measuring the quality of the received data, and the data measured in the data quality measuring step. Target reception quality control width setting step of setting a target reception quality control width based on quality, and target reception quality setting target reception quality based on the target reception quality control width set in the target reception quality control width setting step A setting step and a command generation step of generating a transmission power control command based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step are provided.

According to this method, the data quality is measured,
Based on this measurement value (data quality), the control width of the target reception quality is set (for example, as the control width of the target reception quality, the reduction width is first increased and then the reduction width is gradually decreased), that is, , Since the target reception quality control width of each time is made variable, even if errors occur continuously,
The target reception quality can be quickly converged, and the transmission power can be reduced.

(12) The transmission power control method of the present invention comprises a reception quality measuring step for measuring reception quality, a data quality measuring step for measuring quality of received data, and data measured in the data quality measuring step. A data error monitoring step of monitoring data errors based on quality and generating information for suppressing control of target reception quality, a data quality measured in the data quality measuring step and a target generated in the data error monitoring step Target reception quality setting step of setting a target reception quality based on reception quality control suppression information, and transmission power control based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step And a command generation step of generating a command.

According to this method, the data quality is measured,
Data error is monitored based on this measurement value (data quality) to generate target reception quality control suppression information (for example,
If errors occur continuously, updating of the target reception quality is suppressed), so it is possible to suppress the setting of the excessive target reception quality due to local deterioration of the reception state, and excessive transmission power control. Can be suppressed.

(13) In the transmission power control method of the present invention, the reception quality measuring step for measuring the reception quality, the data quality measuring step for measuring the quality of the received data, and the data measured in the data quality measuring step. Long section data quality information measuring step for measuring data quality information in long section based on quality, data quality measured in the data quality measuring step and long section data quality information measured in the long section data quality information measuring step Target reception quality setting means for setting a target reception quality based on, and a command for generating a transmission power control command based on the reception quality measured in the reception quality measuring step and the target reception quality set in the target reception quality setting step And a generation step.

According to this method, the data quality information in the long section is measured, and the target reception quality is set in consideration of this measurement value (long section data quality information), that is, the long section data quality information (long section). Average data quality and error occurrence tendency in the section)
Since the target reception quality is corrected based on, the average data quality and the desired data quality can be set even when the steady section of the propagation path is short or when the number of data blocks varies with time like packet communication. The error can be reduced.

(14) In the transmission power control method of the present invention, the reception quality measuring step for measuring the reception quality, the data quality measuring step for measuring the quality of the received data, and the data measured in the data quality measuring step. Based on the quality, the target reception quality control range setting step for setting the control range of the target reception quality when data is not received, and the target reception quality based on the target reception quality control range set in the target reception quality control range setting step And a command generation step of generating a transmission power control command based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step. I did it.

According to this method, the data quality is measured,
Based on this measurement value (data quality), set the control range of the target reception quality when data is not received (for example, set a threshold and lower the target reception quality below the threshold while data is not being received. Therefore, even when data is intermittently received as in packet communication, an appropriate target reception quality can be set.

[0047]

BEST MODE FOR CARRYING OUT THE INVENTION The essence of the present invention is that, in the outer loop transmission power control, in order to solve the problems of the conventional immediate control method, the target reception quality (convergence value) is determined based on the values of various parameters indicating the reception environment. ) Is adaptively changed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG.1 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 1 of the present invention.

The transmission power control apparatus shown in FIG. 1 includes an antenna 1, a receiving unit 3, a reception quality measuring unit 5, a data quality measuring unit 7, a reception quality variation measuring unit 9, a target reception quality setting unit 11,
It has a transmission power control command generator 13 and a transmitter 15.

The signal from the communication partner is received by the antenna 1 and then demodulated by the receiving unit 3. Then, the reception quality measurement unit 5 measures the reception quality (for example, SIR) using the demodulation result of the reception unit 3. At the same time, the data quality measuring unit 7 measures the quality (for example, BLER) of the data demodulated by the receiving unit 3.

Here, since the reception quality (SIR) measured by the reception quality measuring unit 5 is a value that reflects the instantaneous reception state, for example, when there is a large change in the reception state due to fading or shadowing. , This reception quality also fluctuates greatly. The reception quality variation measuring unit 9 inputs the measurement result of the reception quality measuring unit 5 and measures such variation in reception quality. As a method of measuring the fluctuation of the reception quality, for example, a method of obtaining the variance can be mentioned. The variance is calculated by the following (Formula 2): Variance = 1 / N × (Reception quality) ^ 2- (Interval average value of reception quality) ^ 2 (Equation 2). Here, N is the length of the section to be evaluated. The section average value of reception quality is the average value of reception quality in the section of length N. As will be described later, the target reception quality is corrected by the magnitude of this dispersion.

Based on the data quality measured by the data quality measuring unit 7, that is, the error information (BLER) of the data, the target reception quality setting unit 11 first, like the conventional method,
If there is an error in the block, the target reception quality is set to a predetermined value (Δ
_up ), and if there is no error in the block, the target reception quality is reduced by another predetermined value (Δ _down ) to obtain the target reception quality before correction. Next, the obtained target reception quality before correction is corrected based on the reception quality fluctuation (dispersion) measured by the reception quality fluctuation measuring unit 9, and the corrected target reception quality is set to the transmission power control command generating unit. Thirteen
Output to.

Here, an example of the correction method will be described with reference to FIGS. FIG. 2 shows the target reception quality (target SIR) and the data quality (BLE) during transmission power control.
FIG. 3 is a characteristic diagram showing the relationship of (R), and FIG. 3 shows the variation (dispersion) of reception quality and the average of data quality under the assumption that the amount of change in BLER with respect to SIR is assumed and the SIR has a normal distribution. It is a characteristic view which shows the relationship of a value (average BLER).

First, from FIG. 2, the BLER is 10% to 0.
Around 1%, if the target SIR changes by 1 dB, BLER
It turns out that is 10 times. FIG. 3 shows the average BLER when the magnitude of the variance is changed under the assumption of this change amount and the SIR having a normal distribution. From FIG. 3, when the variance per data quality measurement section is around 1 dB, the average B increases when the variance increases by 1 dB.
It can be seen that the LER is 10 times, that is, the target SIR is degraded by about 1 dB. In reality, the reception quality measurement cycle is about 1/10 of the data quality measurement cycle, so the variance is almost 1 as well.
Assuming that the target SIR is about / 10, the target SIR should be corrected by about 1/10 of the variance of the measured reception quality of the SIR.

The actual correction value is the fluctuation (dispersion) of the reception quality.
Is set in advance as a parameter and is stored in the target reception quality setting unit 11, for example. Therefore, the target reception quality setting unit 11 corrects the target reception quality (target SIR) using the correction value corresponding to the measurement value of the fluctuation of the reception quality.

As another correction method, a method of correcting the target SIR based on the magnitude of the difference between the maximum value and the minimum value of the SIR can be considered.

Whichever method is used, in the present embodiment,
When the fluctuation of the reception quality is large, it is not possible to set an appropriate target reception quality and it is not possible to obtain the desired data quality. Is measured, and correction is performed to increase the target reception quality based on this measurement value, thereby solving the problem.

After that, the transmission power control command generator 13
Compares the corrected target reception quality obtained by the target reception quality setting unit 11 with the measured reception quality obtained by the reception quality measuring unit 5, and the measured reception quality is higher than the corrected target reception quality. A control command is generated to increase the transmission power when it is low and to decrease the transmission power when the measured reception quality is higher than the corrected target reception quality. The generated control command is output to the transmitter 15.

Then, the transmitting unit 15 modulates the control command output from the transmission power control command generating unit 13 together with other data, and wirelessly transmits it via the antenna 1.

As described above, according to the present embodiment, the variation in reception quality is measured, and the target reception quality is corrected based on this measurement value (variation in reception quality). However, it is possible to set an appropriate target reception quality and perform stable and appropriate transmission power control.

In the present embodiment, the correction value is stored in advance in target reception quality setting section 11, but the present invention is not limited to this. For example, the correction value is stored in advance in the reception quality fluctuation measuring unit 9, the reception quality fluctuation measuring unit 9 measures the fluctuation of the reception quality, and the correction value corresponding to the measured value is output to the target reception quality setting unit 11. You may do it. Further, it is possible to provide a storage device between the reception quality variation measuring unit 9 and the target reception quality setting unit 11 and store the correction value in this storage device.

(Embodiment 2) FIG. 4 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 2 of the present invention. Note that this transmission power control device has the same basic configuration as the transmission power control device shown in FIG. 1, and the same components are assigned the same reference numerals and explanations thereof are omitted.

The feature of this embodiment is that the target reception quality is corrected using the path variation information instead of the reception quality variation information. Therefore, the transmission power control apparatus of the present embodiment has a path allocation unit 21 and a path information monitoring unit 23 instead of the reception quality variation measurement unit 9 shown in FIG. The path allocator 21 is a component generally used in a CDMA receiver, and detects the timing and power of an incoming path necessary for demodulating a received signal including a direct wave and a delayed wave. . The path information monitoring unit 23 monitors the path information (path timing and power) obtained by the path allocation unit 21 and outputs a correction value of target reception quality.

In addition to environmental factors such as fading and shadowing, the reception quality is highly likely to fluctuate greatly even when the path is changed. Therefore, in the present embodiment, the number of paths (obtained by detecting the timing of the path) and the fluctuation of the power of the path are highly correlated with the fluctuation of the reception quality, and the fluctuation amount of the path is When it is large, the target SIR is corrected to be large.
As a result, the first embodiment is performed without performing a new calculation.
The same effect as can be obtained.

That is, the path allocation unit 21 detects the timing of the path and the power of the path necessary for the receiving unit 3 to demodulate the signal received by the antenna 1. The detected path information is stored in the path information monitoring unit 23 in addition to the receiving unit 3.
Also sent to. For example, when there is a change in the number of paths, the path information monitoring unit 23 outputs a correction value of the target reception quality to the target reception quality setting unit 11a according to the size of the change. As the variation amount, for example, the frequency of increase / decrease of the number of paths in a certain section can be used. Further, by taking into consideration the power of the path in addition to the timing of the path (the number of paths), a more effective correction value can be obtained. The correction value is preset with the fluctuation of the path information as a parameter, and is stored in, for example, the path information monitoring unit 23. The target reception quality setting unit 11a corrects the target reception quality (target SIR) using the correction value sent from the path information monitoring unit 23.

As described above, according to the present embodiment, the variation in the path information is measured, and the target reception quality is corrected based on this measurement value (variation in the path information). However, it is possible to set an appropriate target reception quality and perform stable and appropriate transmission power control.

In this embodiment, the correction value is stored in the path information monitoring unit 23 in advance, but the present invention is not limited to this. For example, the correction value may be stored in the target reception quality setting unit 11a in advance, the path information monitoring unit 23 may measure the variation of the path information, and only the measured value may be sent to the target reception quality setting unit 11a. Further, it is possible to provide a storage device between the path information monitoring unit 23 and the target reception quality setting unit 11a and store the correction value in this storage device.

(Embodiment 3) FIG. 5 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 3 of the present invention. Note that this transmission power control device has the same basic configuration as the transmission power control device shown in FIG. 1, and the same components are assigned the same reference numerals and explanations thereof are omitted.

The feature of this embodiment is that it has a target reception quality control width updating unit 31 which monitors data errors and updates (sets) the target reception quality control width (Δ). The target reception quality setting unit 33 includes the target reception quality control width updating unit 3
The target reception quality is set based on the target reception quality control width set in 1.

As the control of the target reception quality, if there is an error, the target reception quality is increased by a predetermined value (Δ _up ), and if there is no error, the target reception quality is decreased by another predetermined value (Δ _down ) Immediately Control method (however, Δ _up × target BLER =
If Δ _down × (1−target BLER) is adopted, as described above, the condition of the reception state may locally become poor depending on the situation of the propagation path, and the reception state of the reception state may be locally reduced. If the conditions become bad, data errors will occur continuously and an excessive target reception quality will be set. Especially when the target BLER is small, it takes a long time to reduce the target reception quality. It will cost. Therefore, in this embodiment, in order to solve this problem, the target reception quality control width (Δ) for each time is made variable.

Here, the operation principle of the target reception quality control width updating unit 31 will be described with reference to FIG. FIG. 6 is a diagram for explaining a target reception quality control method in the present embodiment in comparison with a conventional control method.
FIG. 6A shows the relationship between time and target reception quality in each of the conventional control method and the control method of the present invention, and FIG.
6 shows a target reception quality (target SIR) per unit time and its reduction range in the control method of the present invention shown in FIG. 6 (A).

The number of times a data error occurs in a single section is N
When the (positive integer) times, as the target BLER is given as the desired data quality, in accordance with the following (Equation 3) and (Equation _{4), Δ up '= N} × Δ up ... ( Equation 3) Request T '= N × 1 / ( 1- target BLER) ... (equation 4) Δ _up' and T '. Here, Δ _up ′ represents the target reception quality increased in the single section, and T ′ is the target B.
It shows the length of a section in which no data error occurs, which is necessary to achieve the LER.

In the conventional control method, the broken line P in FIG.
If there is no error, the target reception quality is decreased by a predetermined value (Δ _down ) and transition is made so that the target reception quality decreases linearly. The average value of the transmission power by this control is Δ _up ′ × T ′ / 2.

On the other hand, in the control method of the present invention, unlike the conventional control method, as shown by the solid line Q in FIG.
When the reduction of the target reception quality is started, the reduction width is increased, and thereafter the control is performed such that the reduction width is gradually decreased. For example, as an example, Δ _down ′ (t) = 2 × Δ _up ′ / (T ′ ^ 2) (T′−t) (Equation 5) Target reception according to the quadratic function shown in the following (Equation 5) Control to reduce the quality. Here, t is a time from the start of control and takes values of 1, 2, 3, ..., T ′. For example, the control contents when T ′ = 10 and Δ _up ′ = 1 dB are as shown in FIG. 6 (B). The average value of the transmission power by this control is Δ _up ′ × T ′ / 3, which is Δ _up ′ × T ′ on average as compared with the case of the conventional control method.
The transmission power can be reduced by / 6. If no error occurs in the section T ′, Δ _down ′ (t) is set again. In this case, Δ _up ′ = Δ _up , T ′ = 1 / (1-
Target BLER).

As another control method, a method in which T'is divided into constant intervals and the control width is gradually reduced can be considered.

Whichever method is used, in the present embodiment,
Increase the control width (Δ) at the beginning of lowering to increase the convergence speed,
After that, the transmission power is reduced by gradually reducing the control width (Δ). Further, even when errors occur continuously in a short interval, the target reception quality can be converged at high speed by using the control method of the present invention. However, in consideration of the case where the bad propagation path environment continues for a long time, it is desirable to perform control so that the control width (Δ) at the beginning of lowering is not extremely increased.

According to the above operation principle, the target reception quality control width updating unit 31 monitors the data quality measured by the data quality measuring unit 7, that is, the presence or absence of a data error, and the target reception quality is updated every time there is an error. To the target reception quality setting unit 33, which outputs a control width for increasing Δup by Δ _up . And
At the same time, it is checked whether or not there is an error in the past L times of data, and _Δup ′ and T ′ are obtained. Here, the value of L depends on the data length, fading frequency, etc.
It is suitable that it is 0 or less (L ≦ 10). And
Δ _down ′ (t) is calculated from the calculated Δ _up ′ and T ′. The target reception quality setting unit 33 updates (sets) the target reception quality based on the control width output from the target reception quality control width updating unit 31.

Next, the method of controlling the target reception quality of the present invention will be described with reference to the flowchart of FIG.

First, in step S1000, the data quality measuring unit 7 measures the quality of the data, that is, the error information (for example, BLER) of the data, and outputs the measurement result to the target reception quality control width updating unit 31. .

Then, in step S1100, the target reception quality control width updating unit 31 determines whether or not there is an error based on the error information (BLER) from the data quality measuring unit 7. If there is an error as a result of this determination (S1
(100: YES), the process proceeds to step S1200, and if there is no error (S1100: NO), step S1400.
Proceed to.

In step S1200, the target reception quality control width updating unit 31 sets the control width to a predetermined value (Δ _up ) and at the same time, based on the history of data errors of the past L times, an appropriate Δ _{do wn} ′ ( Calculate t). The set control width Δ _up is
It is output to the target reception quality setting unit 33. Also, the calculated Δ _down ′ (t) is temporarily stored.

[0083] Then, in step S1300, the target reception quality setting unit 33, and updates only the target reception quality control width delta _{Stay up-set} in step S1200, step S100
Return to 0.

On the other hand, in step S1400, the control width is set to the current Δ _down ′ (t), and Δ _down ′ (t + 1) to be used next time is calculated. Set control width Δ
_down ′ (t) is output to the target reception quality setting unit 33. Also, the calculated Δ _down ′ (t + 1) is Δ _down ′.
(T) is temporarily saved by overwriting.

Then, in step S1500, target reception quality setting section 33 updates the target reception quality by control width Δ _down ′ (t) set in step S1400, and the process returns to step S1000.

As described above, according to the present embodiment, the degree of concentration of data errors is monitored, and as the control width of the target reception quality, the reduction width is first increased and then gradually decreased. That is, since the target reception quality control width for each time is made variable, even if errors occur continuously,
The target reception quality can be quickly converged. Also,
The transmission power can be reduced as compared with the case of the conventional control method.

(Embodiment 4) FIG.8 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 4 of the present invention. Note that this transmission power control device has the same basic configuration as the transmission power control device shown in FIG. 1, and the same components are assigned the same reference numerals and explanations thereof are omitted.

The feature of this embodiment is that it has a data error monitoring unit 41 that monitors data errors and outputs target reception quality control suppression information. Target reception quality setting unit 4
3 sets the target reception quality based on the data quality measured by the data quality measuring unit 7 and the target reception quality control suppression information output from the data error monitoring unit 41.

As the control of the target reception quality, if there is an error, the target reception quality is increased by a predetermined value (Δ _up ), and if there is no error, the target reception quality is decreased by another predetermined value (Δ _down ) Immediately Control method (however, Δ _up × target BLER =
If Δ _down × (1−target BLER) is adopted, as described above, if data errors occur continuously under conditions where the reception state is locally poor, excessive quality will be set. In the case of a service having a small target BLER, there is a problem that the value of Δ _down becomes small and the convergence becomes slow. Therefore, in the present embodiment, the target reception quality is not updated (controlled) when consecutive errors occur, so that excessive transmission due to such local reception quality deterioration is caused. The power control is suppressed to keep the transmission power low.

That is, the data error monitoring unit 41 monitors the data error information output from the data quality measuring unit 7, and if there is an error, checks the number of errors in the past short section L, and the error is M When the number is equal to or more than the number, the target reception quality control suppression information for not updating the target reception quality is output to the target reception quality setting unit 43. The value of L is set to a value that is sufficiently small with respect to the reciprocal of the error rate, for example, about 10 so as not to adversely affect the control due to a steady error. Further, the delta _{Stay up-is} the control width when an error occurs, for taking a large value such as not to cause a continuous error, M
The value of may be set to about 3, for example. The target reception quality setting unit 43 normally increases the target reception quality by Δ _up when there is an error, but does not update the target reception quality when the target reception quality control suppression information is input.

As described above, according to the present embodiment, the number of errors in the past short interval is monitored, and when the errors occur continuously, the update of the target reception quality is suppressed, and therefore the local reception quality is suppressed. It is possible to suppress the excessive setting of the target reception quality due to the excessive deterioration of the reception state, and it is possible to suppress the excessive transmission power control.

(Embodiment 5) FIG. 9 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 5 of the present invention. Note that this transmission power control device has the same basic configuration as the transmission power control device shown in FIG. 1, and the same components are assigned the same reference numerals and explanations thereof are omitted.

The feature of this embodiment is that the average value of the long-term data quality (average data quality) is measured, and the measurement result is compared with the desired data quality to obtain the correction value of the target reception quality. That is, the data quality measuring unit 51 is included. The target reception quality setting unit 53 sets the target reception quality based on the data quality measured by the data quality measuring unit 7 and the target reception quality correction value obtained by the long-term average data quality measuring unit 51.

As the control of the target reception quality, if there is an error, the target reception quality is increased by a predetermined value (Δ _up ), and if there is no error, the target reception quality is decreased by another predetermined value (Δ _down ) Immediately Control method (however, Δ _up × target BLER =
Δ _down × (1−target BLER) is theoretically an excellent method that can obtain a desired data quality on average in a long time even if the state of the propagation path changes. However, as described above, there is a problem that an error from the desired data quality occurs when the steady section of the propagation path is short or when the number of data blocks temporally changes as in packet communication. On the other hand, as described above, the data quality of a certain sufficient length is observed, the average data quality of the obtained long section is compared with the desired data quality (required value), and if the former is lower than the latter, the target There is known a periodic control method in which the reception quality is increased by a predetermined value and the target reception quality is decreased by the same predetermined value when the former is higher than the latter. Therefore, in the present embodiment, by adding the periodic control method to the immediate control method and correcting the target reception quality with the average data quality in the long section, the error from the desired data quality in the long section is reduced. I am trying. However, in the present proposal, the control is performed not only by combining the immediate control method and the periodic control method but also by considering the tendency of the number of errors.

That is, the long interval average data quality measuring unit 5
1 measures the average data quality in a long section of K / (target BLER), divides the long section into J small sections, and detects the number of error blocks generated in each small section. In order to improve the measurement accuracy of BLER, the value of K is preferably 10 or more (K ≧ 10). Further, it is desirable that the value of J is the same as K (J = K) or about twice (J≈2K). The correction value of the target reception quality is determined by comparing the average data quality in the long section with the desired data quality and also considering the tendency of the number of past errors.

For example, as the simplest example, when the number of errors in the latest small section is larger than the number of errors generated in other sections, the target reception quality is decreased from the result of the data quality in the long section. Even if the correction value for
A control that does not adopt the correction value can be considered. It is also possible to apply a linear prediction method to perform weighted averaging of the past number of errors, and perform similar control based on the result.

The target reception quality setting unit 53 corrects the target reception quality obtained by the conventional immediate control method using the correction value obtained by the long-term average data quality measuring unit 51.

As described above, according to the present embodiment, the average data quality in the long section is measured, the error occurrence tendency in the section is obtained, and the target reception quality is corrected based on these results. The error between the average data quality and the desired data quality can be reduced even when the steady section of the propagation path is short or when the number of data blocks varies with time as in packet communication.

(Embodiment 6) FIG.10 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 6 of the present invention. Note that this transmission power control device has the same basic configuration as the transmission power control device shown in FIG. 1, and the same components are assigned the same reference numerals and explanations thereof are omitted.

The feature of the present embodiment is that the target reception quality threshold value setting unit 61 that sets the threshold value (lower limit value) of the target reception quality and outputs a control trigger based on the number of error-free data is used. To have. Target reception quality setting unit 63
Sets the target reception quality based on the control trigger output from the target reception quality threshold setting unit 61.

As the control of the target reception quality, if there is an error, the target reception quality is increased by a predetermined value (Δ _up ), and if there is no error, the target reception quality is decreased by another predetermined value (Δ _down ) Immediately Control method (however, Δ _up × target BLER =
When Δ _down × (1−target BLER) is used), as described above, an inappropriate target reception quality may be set in a service such as packet communication that receives data intermittently. Therefore, the control method at that time becomes a problem.

Specifically, for example, when the control for lowering the target reception quality is performed even when there is no data, as shown by a broken line R in FIG. , The target reception quality is too low, and errors may occur continuously. On the contrary, if the control for lowering the target reception quality is not performed when there is no data, as shown by the broken line S in FIG. 11, there is a problem that the target reception quality converges slowly.

Therefore, in the present embodiment, in order to solve this problem, as shown by the solid line T in FIG. 11, a threshold value (lower limit value) is set in advance and the target reception is performed when no data exists. We try not to reduce the quality below the threshold.

That is, the target reception quality threshold setting unit 6
1 first sets a threshold value (lower limit value) α of target reception quality. This threshold value α is a value larger than the target reception quality β in which the previous error occurred by a predetermined value γ. The value of γ is
For example, it is set to about 10 to 50% of Δ _up .

While the threshold value α is set, the target reception quality setting unit 63 decreases the target reception quality by Δ _down until the threshold value α is reached regardless of the presence or absence of data. During this period, the target reception quality threshold setting unit 61 counts the number of error-free data. This is to obtain the time until the target reception quality reaches the threshold value α when the control for lowering the target reception quality is performed only when there is error-free data. During this time, the target reception quality threshold value setting unit 61 continues to set the threshold value α. The number D of error-free data before reaching the threshold value α is given by the following (Equation 6), D = (Δ _up −γ) / Δ _down (Equation 6).

Further, the target reception quality threshold setting unit 61
Is the threshold value α when the number of error-free data reaches D.
Is released, and thereafter, every time data having no error is received, a control trigger for lowering the target reception quality is output to the target reception quality setting unit 63. When the threshold value α is released, the target reception quality setting unit 63 reduces the target reception quality by Δ _down according to the control trigger from the target reception quality threshold value setting unit 61.
Lower by one.

When erroneous data is received during the above control, the target reception quality threshold setting unit 6
1 outputs a control trigger for increasing the target reception quality and newly sets the threshold value. Target reception quality setting unit 6
3, every time inputting a control trigger for raising the target reception quality, increase the target reception quality by delta _{Stay up-.}

The above control depends on the value of γ,
Since the target reception quality is lowered faster than the original speed, the target reception quality at which an error occurs becomes higher than when receiving continuous data. However, it is considered that the transmission power as a whole can be reduced because the transmission power can be reduced quickly even when the period in which data is not transmitted is long.

Next, the control method of the present invention will be described with reference to the flow chart of FIG.

First, in step S2000, target reception quality threshold value setting section 61 sets an initial value of target reception quality and threshold value α.

In step S2100, the data quality measuring unit 7 measures the quality of the data, that is, data error information (for example, BLER), and outputs the measurement result to the target reception quality threshold value setting unit 61. To do.

Then, in step S2200, target reception quality threshold setting section 61 determines whether or not there is an error based on error information (BLER) from data quality measuring section 7. As a result of this judgment, if there is no error (S
2200: NO), the process proceeds to step S2300, and if there is an error (S2200: YES), step S300
Go to 0.

In step S2300, there is no error in the data, and it is further determined whether or not there is data. As a result of this judgment, if there is no data (S2
(300: NO), the process proceeds to step S2500, and if there is data, that is, if the received data is not incorrect (S2300: YES), the process proceeds to step S2600.

In step S2400, target reception quality setting section 63 confirms whether threshold value α is set. As a result of this confirmation, when the threshold value α is set (S2400: YES), step S25.
00, and if the threshold value is not set (S2
400: NO), immediately proceeds to step S2900.
In step S2500, it is determined whether the current target reception quality is larger than the threshold value α. As a result of this determination, when the current target reception quality is larger than the threshold value α (S2500: YES), that is, in the situation where there is no data and the threshold value α is set, the target reception quality is higher than the threshold value α. If is also larger, immediately step S29.
If the current target reception quality is equal to or lower than the threshold value α (S2500: NO), the process returns to step S2100.

On the other hand, in step S2600, it is the case where the correct data is received, and the target reception quality threshold value setting unit 61 counts the number of error-free data.

Then, in step S2700, it is judged from the current count value (the number of error-free data) whether or not the target reception quality has reached threshold value α, in other words, the target reception quality is It is determined whether or not as many error-free data as the threshold value α have been received. As a result of this determination, when the target reception quality reaches the threshold value α (S2700: YES), the process proceeds to step S2800,
If the target reception quality has not reached the threshold value α (S2
700: NO), immediately proceeds to step S2900.

In step S2800, the currently set threshold value α is released and a control trigger for lowering the target reception quality is output to target reception quality setting unit 63.

Then, in step S2900, target reception quality setting section 63 lowers the target reception quality by Δ _down , and the process returns to step S2100.

On the other hand, in step S3000, there is an error in the data, and target reception quality threshold setting section 6
At 1, the threshold value (lower limit value) α is newly set (updated), and a control trigger for increasing the target reception quality is output to the target reception quality setting unit 63.

Then, in step S3100, target reception quality setting section 63 raises the target reception quality by Δ _up ,
It returns to step S2100.

As described above, according to the present embodiment, when performing control for lowering the target reception quality, threshold value α is set, and the target reception quality is reduced up to threshold value α regardless of the presence or absence of data. Then, the target reception quality is held at the threshold α until the number of error-free data reaches a number corresponding to the time until the target reception quality reaches the threshold α, and then the error-free data is received. Since the control is performed so as to reduce the target reception quality only when the data is received, an appropriate target reception quality can be set even when data is intermittently received as in packet communication.

The transmission power control apparatus according to each of the above embodiments can be installed in the base station apparatus or mobile station apparatus in the mobile communication system using the CDMA system.

[0123]

As described above, according to the present invention,
Even when the fluctuation of the reception quality is large, it is possible to set an appropriate target reception quality. Moreover, even if errors occur continuously, the target reception quality can be quickly converged. Further, even when the steady section is short or when the number of data blocks varies with time as in packet communication, the error between the actual average data quality and the desired data quality can be reduced. Even when data is received intermittently as in packet communication, an appropriate target reception quality can be set.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 1 of the present invention.

[Fig. 2] Target reception quality (target SIR) and data quality (B
Characteristic diagram showing the relationship of (LER)

FIG. 3 is a characteristic diagram showing a relationship between a variation (dispersion) of reception quality and an average value (average BLER) of data quality.

FIG. 4 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 2 of the present invention.

FIG. 5 is a block diagram showing the configuration of a transmission power control apparatus according to Embodiment 3 of the present invention.

FIG. 6 is a diagram for explaining a target reception quality control method according to a third embodiment in comparison with a conventional control method.

FIG. 7 is a flowchart for explaining a target reception quality control method according to the third embodiment.

FIG. 8 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 4 of the present invention.

FIG. 9 is a block diagram showing the configuration of a transmission power control apparatus according to Embodiment 5 of the present invention.

FIG. 10 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 6 of the present invention.

FIG. 11 is a diagram for explaining a control method of target reception quality in Embodiment 6 while comparing it with a conventional control method.

FIG. 12 is a flowchart for explaining a method of controlling target reception quality according to the sixth embodiment.

FIG. 13 is a block diagram showing a configuration of a conventional transmission power control device.

[Explanation of symbols]

1 Antenna 3 Receiving Unit 5 Reception Quality Measuring Unit 7 Data Quality Measuring Unit 9 Reception Quality Variation Measuring Unit 11, 11a, 33, 43, 53, 63 Target Reception Quality Setting Unit 13 Transmission Power Control Command Generation Unit 15 Transmission Unit 21 Path Allocation Part 23 Path information monitoring part 31 Target reception quality control width updating part 41 Data error monitoring part 51 Long section average data quality measuring part 61 Target reception quality threshold setting part

Claims (14)

[Claims] 1. A reception quality measuring means for measuring reception quality, a data quality measuring means for measuring quality of received data, and a reception quality variation for measuring fluctuation of reception quality measured by the reception quality measuring means. Measuring means, a target reception quality setting means for setting a target reception quality based on the data quality measured by the data quality measuring means and the reception quality fluctuation measured by the reception quality fluctuation measuring means, and the reception quality measuring means A transmission power control device for generating a transmission power control command based on the reception quality measured by the target reception quality and the target reception quality set by the target reception quality setting means. 2. A reception quality measuring unit for measuring reception quality, a data quality measuring unit for measuring quality of received data, a path information detecting unit for detecting path information, and a path information detecting unit for detecting the path information. Path information fluctuation measuring means for measuring fluctuations in path information, and a target for setting a target reception quality based on the data quality measured by the data quality measuring means and the path information fluctuation measured by the path information fluctuation measuring means. Reception quality setting means, and command generation means for generating a transmission power control command based on the reception quality measured by the reception quality measuring means and the target reception quality set by the target reception quality setting means. A characteristic transmission power control device. 3. Receiving quality measuring means for measuring receiving quality, data quality measuring means for measuring quality of received data, and control of target receiving quality based on the data quality measured by the data quality measuring means. A target reception quality control width setting means for setting a width, a target reception quality setting means for setting a target reception quality based on the target reception quality control width set by the target reception quality control width setting means, and the reception quality measurement A transmission power control device for generating a transmission power control command based on the reception quality measured by the means and the target reception quality set by the target reception quality setting means. 4. A reception quality measuring means for measuring reception quality, a data quality measuring means for measuring quality of received data, and a data error monitoring based on the data quality measured by the data quality measuring means. Data error monitoring means for generating information for suppressing the control of the target reception quality, and based on the data quality measured by the data quality measuring means and the target reception quality control suppression information generated by the data error monitoring means. Target reception quality setting means for setting a target reception quality according to the above, and a command for generating a transmission power control command based on the reception quality measured by the reception quality measuring means and the target reception quality set by the target reception quality setting means. A transmission power control device comprising: a generation unit. 5. A reception quality measuring means for measuring reception quality, a data quality measuring means for measuring quality of received data, and data in a long section based on the data quality measured by the data quality measuring means. Long-term data quality information measuring means for measuring quality information, and a target reception quality based on the data quality measured by the data quality measuring means and the long-term data quality information measured by the long-term data quality information measuring means. Target reception quality setting means for setting, command generation means for generating a transmission power control command based on the reception quality measured by the reception quality measuring means and the target reception quality set by the target reception quality setting means, A transmission power control device having. 6. A reception quality measuring means for measuring reception quality, a data quality measuring means for measuring quality of received data, and a non-reception of data based on the data quality measured by the data quality measuring means. Target reception quality control range setting means for setting the target reception quality control range, and target reception quality setting means for setting the target reception quality based on the target reception quality control range set by the target reception quality control range setting means. And a command generation unit that generates a transmission power control command based on the reception quality measured by the reception quality measurement unit and the target reception quality set by the target reception quality setting unit. Power control device. 7. A base station apparatus comprising the transmission power control apparatus according to claim 1. Description: 8. A mobile station apparatus comprising the transmission power control apparatus according to claim 1. Description: 9. A reception quality measuring step of measuring reception quality, a data quality measuring step of measuring quality of received data, and a reception quality variation measuring step of measuring fluctuations of the reception quality measured in the reception quality measuring step. Step, a target reception quality setting step of setting a target reception quality based on the data quality measured in the data quality measuring step and the reception quality fluctuation measured in the reception quality fluctuation measuring step, and measured in the reception quality measuring step A command generation step of generating a transmission power control command based on the reception quality and the target reception quality set in the target reception quality setting step, and a transmission power control method comprising: 10. A reception quality measuring step of measuring reception quality, a data quality measuring step of measuring quality of received data, a path information detecting step of detecting path information, and a path information detecting step. A path information fluctuation measuring step for measuring fluctuations in path information; a target reception quality setting for setting a target reception quality based on the data quality measured in the data quality measuring step and the path information fluctuation measured in the path information fluctuation measuring step. Means, and a command generation step of generating a transmission power control command based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step, and the transmission power. Control method. 11. A reception quality measurement step of measuring reception quality, a data quality measurement step of measuring quality of received data, and a control width of a target reception quality based on the data quality measured in the data quality measurement step. A target reception quality control width setting step for setting the target reception quality control width, a target reception quality setting step for setting a target reception quality based on the target reception quality control width set in the target reception quality control width setting step, and the reception quality measurement step And a command generation step of generating a transmission power control command based on the measured reception quality and the target reception quality set in the target reception quality setting step. 12. A reception quality measuring step of measuring reception quality, a data quality measuring step of measuring quality of received data, and monitoring data error based on the data quality measured in the data quality measuring step. A data error monitoring step for generating information for suppressing the control of the target reception quality, a target reception based on the data quality measured in the data quality measuring step and the target reception quality control suppression information generated in the data error monitoring step. A target reception quality setting step of setting quality, and a command generation step of generating a transmission power control command based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step, A method for controlling transmission power, comprising: 13. A reception quality measuring step of measuring reception quality, a data quality measuring step of measuring quality of received data, and a data quality in a long section based on the data quality measured in the data quality measuring step. A long section data quality information measuring step for measuring information, a target for setting a target reception quality based on the data quality measured in the data quality measuring step and the long section data quality information measured in the long section data quality information measuring step A reception quality setting unit, and a command generation step of generating a transmission power control command based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step, Transmission power control method. 14. A reception quality measurement step of measuring reception quality, a data quality measurement step of measuring quality of received data, and a data quality measurement step of the data quality measurement step of A target reception quality control range setting step for setting a control range of the target reception quality, a target reception quality setting step for setting a target reception quality based on the target reception quality control range set in the target reception quality control range setting step, A transmission power control method, comprising: a command generation step of generating a transmission power control command based on the reception quality measured in the reception quality measurement step and the target reception quality set in the target reception quality setting step.