WO2001001607A1 - Controleur de puissance d'emission - Google Patents
Controleur de puissance d'emission Download PDFInfo
- Publication number
- WO2001001607A1 WO2001001607A1 PCT/JP2000/003873 JP0003873W WO0101607A1 WO 2001001607 A1 WO2001001607 A1 WO 2001001607A1 JP 0003873 W JP0003873 W JP 0003873W WO 0101607 A1 WO0101607 A1 WO 0101607A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tpc bit
- transmission
- value
- transmission power
- power control
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/08—Closed loop power control
Definitions
- the present invention relates to a transmission power control device in mobile communication using a CDMA system.
- FIG. 1 is a diagram illustrating a reception state by a communication device including a conventional transmission power control device.
- the first communication device receives the signal transmitted by the second communication device via the transmission line, and measures the SIR (desired wave to 1000 wave power ratio) of the received signal. Further, the first communication device uses the received signal's SIR (hereinafter, referred to as “RS IR”) and a desired SIR (hereinafter, referred to as “TS IR”) to increase or decrease the transmission power to the second communication device. Set the contents of the TPC bit to indicate.
- SIR received wave to 1000 wave power ratio
- the content of the TPC bit is set to "0". Conversely, at time t2, the content of the TPC bit is set to "1" because it is TSIR than RSIR.
- the first communication device transmits a signal including the TPC bit set in this way to the second communication device.
- the second communication device receives a signal transmitted from the first communication device, and changes transmission power based on a TPC bit in the received signal. That is, if the content of the TPC bit in the received signal is “0”, the second communication device Judge that the instruction from the first communication device is to lower the transmission power, and reduce the step gain (amplification amount) of the current transmission signal by a preset amount. Conversely, if the content of the TPC bit in the received signal is “1”, the second communication device determines that the instruction from the first communication device is to increase the transmission power, and the current transmission Increase the signal step gain by a preset amount.
- the first communication device can keep the reception quality constant by causing the second communication device to change the transmission power according to the reception status.
- the second communication device like the first communication device, transmits a signal including the TPC bit to the first communication device, thereby causing the first communication device to change the transmission power.
- a communication device including a conventional transmission power control device has the following problems.
- the first communication device and the second communication device described above will be described as examples.
- the first communication device In the situation where the maximum Doppler frequency is very small, the first communication device must be either “0” or “1” even if the RSIR becomes close to the TSIR (suitable value). Since the set TPC bit is transmitted to the second communication device, the second communication device always increases or decreases the transmission power. For this reason, the received power in the first communication device constantly fluctuates around the appropriate value and becomes unstable as shown in FIG.
- the second communication device uses a fixed value as the value of the step gain at the time of transmission power control, that is, the amplification amount that is increased or decreased based on the TPC bit in the received signal.
- the optimum value of the step gain differs depending on the maximum Doppler frequency.
- the second communication device controls (over-controls) the transmission power to a value above or below the optimum value in a situation where the maximum Doppler frequency is low. Therefore, the received power of the first communication device lacks stability. Conversely, the second communication device has a step gain If a value smaller than the appropriate value is used, it becomes difficult to control the transmission power to the optimum value in a situation where the maximum Doppler frequency is high.Therefore, the reception power of the first communication device follows the condition of the transmission path. Is reduced.
- the second communication device cannot make the transmission power follow the optimum value due to the control delay even if a large value is used as the step gain. Therefore, as shown in FIG. 3, the received power in the first communication device cannot follow the situation where the maximum Doppler frequency is high.
- the followability of the received SIR with respect to the state of the transmission path is worse than when no power control is performed, and the over-control is performed. It can be said that this has been done. Since such a situation as at the time t3 occurs, the required average E b / No for satisfying the required quality may be deteriorated by performing the power control.
- the reception power may be unstable due to the influence of the maximum Doppler frequency, that is, the line quality. Disclosure of the invention
- An object of the present invention is to provide a transmission power control device that controls reception power and transmission power to optimal values according to channel quality.
- the purpose of this is to change the amplification value of the transmission signal according to the likelihood of the TPC bit in the received signal, and to adjust the TPC bit included in the transmission signal according to the difference between the reception quality of the received signal and the reference reception quality. Achieved by varying the amplitude.
- FIG. 1 shows the TPC bit of a communication device with a conventional transmission power control device. Diagram showing the settings;
- Fig. 2 is a diagram showing the state of received power when the maximum Doppler frequency of a communication device having a conventional transmission power control device is small;
- FIG. 3 is a diagram showing the state of reception SIR when the maximum Doppler frequency of a communication device having a conventional transmission power control device is large;
- FIG. 4 is a block diagram showing a configuration of a communication device including a transmission power control device according to Embodiment 1 of the present invention
- FIG. 5 is a block diagram showing a configuration of a communication device including a transmission power control device according to Embodiment 2 of the present invention.
- FIG. 6 is a block diagram showing a configuration of a communication device including a transmission power control device according to Embodiment 3 of the present invention.
- FIG. 4 is a block diagram showing a configuration of a communication device including a transmission power control device according to Embodiment 1 of the present invention.
- a signal received via antenna 101 is subjected to predetermined processing such as frequency conversion by radio reception section 102.
- the reception signal after the predetermined processing is demodulated by demodulation section 103.
- the demodulated signal is sent to SIR estimation section 104 and TPC / PL extraction section 112.
- the SIR estimator 104 estimates RSIR from the demodulated signal.
- the estimated R SIR is subjected to a subtraction process from the T SIR in an adder 105. That is, T SIR is subtracted from the estimated R SIR.
- the result of the subtraction by the adder 105 is sent to the absolute value calculator 117 and the positive / negative determiner 118.
- the absolute value calculation unit 117 the subtraction result from the addition unit 105 is calculated.
- An absolute value is calculated.
- the threshold value set by the threshold value setting unit 107 is subtracted from the calculation result by the absolute value calculation unit 117. Thereafter, it is determined whether the result of the subtraction is positive or negative. “1” or “0” is output to the multiplication unit 119 according to the case where the subtraction result is positive or negative, respectively.
- the positive / negative determining unit 118 determines whether the subtraction result from the adding unit 105 is a positive value or a negative value. “1-1” or “1” is output to the multiplication unit 119 in accordance with whether the subtraction result from the addition unit 105 is positive or negative, respectively.
- TPC bit information is set by performing a multiplication process on the output from the positive / negative judgment unit 106 and the output from the positive / negative judgment unit 118. Specifically, if the absolute value of the difference between RSIR and TSIR is less than the threshold, the TPC bit information is set to "0". If the absolute value of the difference between 1311 ⁇ and 511 is greater than or equal to the threshold value, if RS IR> TS IR, the TPC bit information is set to "-1”. If IR ⁇ TS IR, the TPC bit information is “+1”.
- TPC bit information that instructs the communication partner to maintain the current transmission power is set.
- the TPC bit information that instructs the communication partner to reduce the transmission power is transmitted.
- it is RSIR or TSIR TPC bit information that instructs the communication partner to increase the transmission power is set. That is, the TPC bit information is set according to the absolute value of the difference between RSIR and TSIR, and the magnitude relationship between 1511 ⁇ and SIR.
- the TPC bit information set by multiplication section 119 is sent to frame configuration section 109.
- frame configuration section 109 a transmission frame including the transmission data and the TPC bit information set by multiplication section 119 is configured. Specifically, when the TPC bit information from multiplier 119 is “+1”, the amplitude of the TPC bit in the transmission frame is “1”, and the TPC bit information is “ ⁇ 1”. In this case, the amplitude of the TPC bit is set to “ ⁇ 1”. Further, when the TPC bit information is “0”, the amplitude of the TPC bit is set to 0.
- the transmission frame configured as described above is subjected to a predetermined modulation of the CDMA system by modulation section 110, and then transmitted to radio transmission section 111.
- TPC / PL extraction section 112 extracts TPC bits and PL bits from the demodulated signal. Further, the information of the extracted TPC bit is sent from the TPC / PL extraction unit 112 to the sign determination unit 120.
- the positive / negative determining unit 120 determines whether the amplitude of the TPC bit is positive or negative. This determination result is output to a gain setting unit 116 described later.
- the amplitude ratio calculator 113 uses the extracted TPC bit and PL bit to calculate the ratio of the TPC bit amplitude (absolute value) to the PL bit amplitude (absolute value) (hereinafter referred to as “TPC amplitude ratio”). Is calculated. It can be said that the larger the TPC amplitude ratio, the higher the reliability of the TPC bit and the higher the reliability.
- the present embodiment uses the amplitude ratio to the amplitude of the PL bit as a method of calculating the likelihood of the TPC bit, the present invention is not limited to this, and the present invention is not limited to this. It is also applicable when using the amplitude ratio to the amplitude.
- the calculated TPC amplitude ratio is subtracted from the threshold value sent from the threshold value setting unit 115 by the adding unit 114. That is, the threshold value is subtracted from the absolute value of the TPC amplitude ratio.
- a step gain is set based on the subtraction result in the addition unit 114 and the determination result in the positive / negative determination unit 120. sand That is, when the subtraction result in adding section 114 is a negative number, that is, when the TPC amplitude ratio is less than the threshold value, the value of the step gain is set to “0”. Further, when the subtraction result in the adding unit 114 is a positive number, that is, when the TPC amplitude ratio is equal to or larger than the threshold, the amplitude of the TPC bit is a positive value in the positive / negative determining unit 120. Is determined, the value of the step gain is set to “+1”.
- the value of the step gain is set to “1”. 1 ”.
- the TPC amplitude ratio that is, the likelihood of the TPC bit is less than the threshold
- the TPC bit is regarded as having low reliability and is not used for transmission power control. That is, the value of the step gain is set to “0”.
- the TPC amplitude ratio is assumed to be highly reliable and used for transmission power control. That is, in this case, the step gain is set to “+1” or “ ⁇ 1” according to the sign of the amplitude value of the TPC bit.
- the step gain is “+1” or “1-1”.
- the present invention is not limited to this. The present invention is applicable even when appropriately changed according to various conditions.
- the value of the step gain is set according to the likelihood of the TPC bit.
- the wireless transmission unit 111 the transmission frame after the above-described modulation is amplified by an amplification amount obtained by increasing or decreasing the current amplification value by the step gain sent from the gain setting unit 116, and transmitted via the antenna 101. You.
- the (first) communication device provided with the transmission power control device having the above configuration
- the difference between RSIR and TSIR is less than the threshold value, that is, when the reception power approaches an appropriate value
- a transmission signal composed of a transmission frame with the TPC bit amplitude set to 0 is transmitted.
- the (second) communication device (which has the transmission power control device having the above-described configuration) that has received the signal transmitted in this manner, compares the amplitude of the TPC bit with the amplitude of the PL bit in the received signal. Based on the ratio, By recognizing that the amplitude of this TPC bit is 0, that is, recognizing an instruction to maintain the current transmission power, the transmission signal is transmitted with the current transmission power.
- the reception power in the first communication device becomes stable.
- the communication device including the transmission power control device configured as described above determines the likelihood of the TPC bit based on the ratio of the amplitude value of the TPC bit to the amplitude value of the PL bit in the received signal, and determines the determination result. Since the step gain is set according to, it is possible to suppress a decrease in the accuracy of the transmission power control due to the unreliable TPC bit.
- the TPC bit included in the transmission signal is changed according to the difference between RSIR and TSIR, so that the received power can be controlled to an optimal value. Furthermore, by setting the step gain according to the likelihood of the TPC bit in the received signal, it is possible to improve the accuracy of transmission power control.
- the threshold value setting unit 115 may output two or more threshold values. Thereby, more accurate transmission power control can be performed.
- Embodiment 2 is a mode in which Embodiment 1 is different from Embodiment 1 in that the threshold value for the difference between RSIR and TSIR and the threshold value for the TPC amplitude ratio are set according to the channel quality.
- a communication device including the transmission power control device according to the present embodiment will be described using FIG. Note that the same reference numerals as in FIG. 4 denote the same components in FIG. 5 as in FIG. 4, and a detailed description thereof will be omitted.
- FIG. 5 is a block diagram showing a configuration of a communication device including a transmission power control device according to Embodiment 2 of the present invention.
- a fluctuation speed detection unit 201 detects a line fluctuation speed (for example, a maximum Doppler frequency) by using a signal demodulated by the demodulation unit 103.
- the threshold value setting unit 107 sets a threshold value to be output to the positive / negative judgment unit 106 according to the detected line fluctuation speed.
- a method of changing the threshold value according to the line fluctuation speed for example, when the maximum Doppler frequency is high, taking into account that the reception power may be better without transmission power control, Increase the threshold. Conversely, if the maximum Doppler frequency is low, decrease the threshold. As a result, when the maximum Doppler frequency is high, the frequency at which the TPC bit amplitude in the transmission frame is set to 0 increases, so that it is possible to prevent the transmission partner from over-controlling the transmission power.
- the maximum Doppler frequency when the maximum Doppler frequency is low, the frequency at which the TPC bit amplitude in the transmission frame is set to 0 becomes low, so that the transmission power of the communication partner is appropriately controlled. Furthermore, if the maximum Doppler frequency is close to zero, it is possible to increase the threshold value to suppress the fluctuation.
- Threshold setting section 203 sets a threshold value to be output to adding section 114 in accordance with the detected line fluctuation speed.
- a threshold value is set in the same manner as that by the threshold value setting unit 107 described above.
- the threshold for the difference between RSIR and TSIR and the threshold for the TPC amplitude ratio are set according to the line fluctuation speed (for example, the maximum Doppler frequency). It is possible to perform transmission power control with higher accuracy than in Embodiment 1. Thereby, the received power can be controlled to an optimum value regardless of the maximum Doppler frequency.
- Embodiment 3 is a form of Embodiment 1 in which a threshold for the TPC amplitude ratio is set according to the power of the received TPC bit.
- a communication device including the transmission power control device according to the present embodiment will be described using FIG.
- FIG. 6 the same components as those in FIG. 4 are denoted by the same reference numerals as those in FIG.
- FIG. 6 is a block diagram showing a configuration of a communication device including a transmission power control device according to Embodiment 3 of the present invention.
- Ding? '? The difference between the extraction unit 301 and the TPC / PL extraction unit 112 in the first embodiment is that the information on the extracted TPC bit is output to the TPC power calculation unit 302.
- the TPC power calculation section 302 calculates the power of the TPC bit using the information on the TPC bit from the TPC / PL extraction section 301.
- the averaging unit 303 calculates the average value of the calculated power of the TPC bits.
- the threshold value setting section 304 sets a threshold value to be output to the addition section 114 according to the calculated average value of the power of the TPC bit.
- a method of setting a threshold value in the threshold value setting section 304 the following method is used.
- the communication partner can obtain desired reception power.
- the communication partner can obtain desired reception power.
- the transmission status of the TPC bit by the communication partner is determined based on the average value of the TPC bits in the received signal, and the step gain setting content is determined according to the determination result. Can be changed, so that the reception quality of the communication partner can be improved.
- Embodiment 4 is an embodiment in which the method of setting the threshold is changed from Embodiment 3.
- a communication device including the transmission power control device according to the present embodiment will be described using FIG. Note that the present embodiment is different from Embodiment 3 (FIG. 6) only in the threshold value setting method by threshold setting section 304 in FIG.
- the threshold value setting section 304 sets a threshold value to be output to the addition section 114 according to the calculated average value of the power of the TPC bit.
- a method of setting a threshold value in the threshold value setting section 304 the following method is used.
- the current threshold value is multiplied by A, and conversely, the average value of the power of the TPC bit is lower than the predetermined value.
- the current threshold is multiplied by B.
- the values of A and B are appropriately set in consideration of various conditions.
- the threshold value is automatically changed according to the magnitude of the average value of the power of the TPC bit.
- the threshold value for the TPC amplitude ratio is automatically set according to the average value of the power of the TPC bit, that is, the reception status of the communication partner. Compared to 3, transmission power control can be performed more efficiently.
- Embodiment 5 is different from Embodiment 3 in the method of setting the threshold. It is a form.
- a communication device including the transmission power control device according to the present embodiment will be described using FIG. Note that the present embodiment is different from Embodiment 3 (FIG. 6) only in the threshold value setting method by threshold value setting section 304 in FIG.
- Threshold setting section 304 sets a threshold to be output to adding section 114 using the calculated average value of the power of the TPC bits. That is, the threshold value setting unit sets a value obtained by multiplying the current threshold value by C calculated by the following equation as a new threshold value.
- X is the average value of the calculated power of the TPC bits
- a and b are values appropriately determined in consideration of various conditions.
- the reception status of the communication partner is appropriately determined according to the reception status of the communication partner. Since the threshold is automatically set, transmission power control can be performed more efficiently than in Embodiment 3.
- the transmission power control device includes an amplification amount setting unit that sets a changed amplification amount according to the reliability of a TPC bit in a reception signal, and a difference between a reception quality of the reception signal and a reference reception quality.
- a TPC bit amplitude value changing means for changing the amplitude value of the transmission TPC bit in accordance with the amplification value obtained from the changed amplification amount, and transmitting the transmission TPC bit having the amplitude value changed.
- Send transmit signal including And a transmitting unit that performs the following.
- the amplitude of the TPC bit included in the transmission signal is changed according to the difference between the reception quality of the reception signal and the reference reception quality, so that the reception power can be controlled to an optimal value. Further, by setting the changed amplification amount according to the likelihood of the TPC bit in the received signal, it is possible to improve the accuracy of transmission power control.
- the TPC bit amplitude value changing means changes the amplitude value of the transmission TPC bit according to the magnitude of the difference with at least one first threshold value. Take the configuration.
- the amplitude of the TPC bit for transmission can be set to three or more types according to the difference between the reception quality of the reception signal and the reference reception quality, so that the reception power can be controlled with high accuracy.
- the TPC bit amplitude value changing means sets the amplitude value of the transmission TPC bit to zero when the difference is smaller than the first threshold value having the minimum value.
- the configuration to change to is adopted.
- the TPC bit amplitude value changing means includes a line quality detecting means for detecting the line quality using the received signal, and the first threshold value is determined according to the detected line quality. Use a configuration that changes the value.
- the first threshold value for example, the line fluctuation speed
- the amplitude value of the transmission TPC bit suitable for the line quality.
- the amplification amount setting means may include at least one A configuration is adopted in which the change amplification amount is set according to the degree of certainty of the TPC bit with respect to the second threshold value.
- the changed amplification amount can be set to three or more types according to the likelihood of the TPC bit in the received signal, so that the transmission power can be controlled with high accuracy.
- the transmission power control device is configured such that the amplification amount setting means sets the changed amplification amount to zero when the probability of the TPC bit is smaller than the second threshold value having the minimum value. Take.
- the changed amplification amount is set to zero.
- the accuracy of transmission power control can be improved.
- the amplification amount setting means includes a line quality detecting means for detecting the line quality using the received signal, and changes the second threshold value according to the detected line quality. Take a configuration to make it.
- the transmission power control device employs a configuration in which the amplification amount setting means includes power calculation means for calculating the power of the TPC bit, and changes the second threshold value based on the calculated power. .
- the second threshold value can be changed according to the transmission status of the TPC bit of the communication partner, so that when the communication partner transmits a signal with the TPC bit amplitude set to 0,
- the amplification change amount can be reliably set to zero, and when the communication partner sets the TPC bit amplitude to positive or negative, the amplification change amount can be surely increased or decreased. With this, the communication partner Desired reception power can be obtained.
- the transmission power control device employs a configuration in which the amplification amount setting means changes the second threshold value according to the magnitude of the average value of the power with respect to the reference value.
- the second threshold value is changed according to the magnitude of the average value of the power of the TPC bit with respect to a certain reference value, so that the setting situation of the amplitude value of the TPC bit by the communication partner can be improved. Can be reliably recognized. This makes it possible to reliably perform transmission power control so that the communication partner obtains desired reception power.
- the transmission power control device employs a configuration in which the amplification amount setting means uses the ratio of the amplitude of the TPC bit to the amplitude of a signal other than the TPC bit in the received signal as the likelihood of the TPC bit.
- the transmission power control device employs a configuration in which the TPC bit amplitude value changing means uses SIR as the reception quality.
- the reception quality of the received signal can be reliably determined by using the SIR as an index of the reception quality.
- a communication terminal device includes a transmission power control device, wherein the transmission power control device sets an amplification amount to be changed according to the likelihood of a TPC bit in a received signal; TPC bit amplitude value changing means for changing the amplitude value of the TPC pit for transmission according to the difference between the reception quality of the received signal and the reference reception quality; and the amplitude value is obtained by using the amplification value obtained from the changed amplification amount.
- the base station apparatus includes a transmission power control device, wherein the transmission power control device sets an amplification amount to be changed according to the likelihood of a TPC bit in a received signal; Using the TPC bit amplitude value changing means for changing the amplitude value of the TPC bit for transmission according to the difference between the signal reception quality and the reference reception quality, and the amplification value obtained from the changed amplification amount, the amplitude value is obtained. Transmitting means for transmitting a transmission signal including the changed transmission TPC bit.
- the transmission power control device that controls the reception power and the transmission power to optimal values according to the channel quality, it is possible to provide a base station device that can perform good communication.
- the transmission power control method includes: an amplification amount setting step of setting a changed amplification amount according to the reliability of a TPC bit in a reception signal; and a difference between a reception quality of the reception signal and a reference reception quality.
- a transmitting step of transmitting is a transmitting step of transmitting.
- the amplitude of the TPC bits included in the transmission signal is changed according to the difference between the reception quality of the reception signal and the reference reception quality, so that the reception power can be controlled to an optimum value. Furthermore, by setting the changed amplification amount according to the likelihood of the TPC bit in the received signal, it is possible to improve the accuracy of transmission power control.
- the amplification value of the transmission signal is changed according to the likelihood of the TPC bit in the reception signal, Since the amplitude of the TPC bit included in the transmission signal is changed, it is possible to provide a transmission power control device that controls the reception power and the transmission power to optimal values according to the channel quality.
- the present invention is suitable for use in the field of mobile communication using the CDMA system.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP00937230A EP1107482A4 (en) | 1999-06-23 | 2000-06-15 | TRANSMISSION POWER CONTROLLER |
AU52475/00A AU5247500A (en) | 1999-06-23 | 2000-06-15 | Transmitting power control unit |
KR1020017002254A KR20010072855A (ko) | 1999-06-23 | 2000-06-15 | 송신 전력 제어 장치와 방법, 통신 단말 장치 및 기지국 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP11/177359 | 1999-06-23 | ||
JP11177359A JP2001007763A (ja) | 1999-06-23 | 1999-06-23 | 送信電力制御装置 |
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WO2001001607A1 true WO2001001607A1 (fr) | 2001-01-04 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2000/003873 WO2001001607A1 (fr) | 1999-06-23 | 2000-06-15 | Controleur de puissance d'emission |
Country Status (6)
Country | Link |
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EP (1) | EP1107482A4 (ja) |
JP (1) | JP2001007763A (ja) |
KR (1) | KR20010072855A (ja) |
CN (1) | CN1314032A (ja) |
AU (1) | AU5247500A (ja) |
WO (1) | WO2001001607A1 (ja) |
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CN100379171C (zh) * | 2003-03-04 | 2008-04-02 | 株式会社Ntt都科摩 | 移动通信系统、无线控制装置、基地台及发送功率控制方法 |
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KR100436762B1 (ko) | 2002-01-02 | 2004-06-23 | 삼성전자주식회사 | 비선형적으로 가변되는 제어값을 출력하는자동이득조절장치 및 그의 이득조절신호 출력방법 |
JP4065138B2 (ja) * | 2002-03-20 | 2008-03-19 | 松下電器産業株式会社 | 送信電力制御情報の生成を制御する方法および移動体端末装置 |
JP2005006252A (ja) | 2003-06-16 | 2005-01-06 | Oki Electric Ind Co Ltd | 送信電力制御方法およびシステム |
CN100394826C (zh) * | 2004-09-02 | 2008-06-11 | 上海贝尔阿尔卡特股份有限公司 | 信道质量内插方法 |
WO2006035498A1 (ja) * | 2004-09-29 | 2006-04-06 | Fujitsu Limited | 送信電力制御装置及び送信電力制御方法 |
AU2006200038A1 (en) * | 2005-03-09 | 2006-09-28 | Nec Australia Pty Ltd | Measuring received signal quality |
US7809395B2 (en) * | 2006-02-15 | 2010-10-05 | Broadcom Corporation | Method and system for controlling transmit circuitry in a wide band CDMA network |
KR100765892B1 (ko) * | 2006-08-30 | 2007-10-10 | 주식회사 팬택 | 이동통신 시스템의 셀간 간섭을 제어하는 방법 |
CN101359936B (zh) * | 2007-08-02 | 2012-09-05 | 鼎桥通信技术有限公司 | 一种内环功控的方法及装置 |
CN102404836B (zh) * | 2010-09-16 | 2015-05-20 | 中兴通讯股份有限公司 | Tpc命令获取方法及装置 |
JP5337917B1 (ja) * | 2013-01-18 | 2013-11-06 | 東京計装株式会社 | 超音波流量計 |
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JPH08307343A (ja) * | 1995-05-11 | 1996-11-22 | Oki Electric Ind Co Ltd | 無線通信装置 |
JPH10126337A (ja) * | 1996-10-18 | 1998-05-15 | Mitsubishi Electric Corp | 送信電力制御装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5216692A (en) * | 1992-03-31 | 1993-06-01 | Motorola, Inc. | Method and apparatus for adjusting a power control threshold in a communication system |
US6411799B1 (en) * | 1997-12-04 | 2002-06-25 | Qualcomm Incorporated | Method and apparatus for providing ternary power control in a communication system |
JP3471662B2 (ja) * | 1998-08-28 | 2003-12-02 | 松下電器産業株式会社 | 送受信装置及びその送信電力制御方法 |
-
1999
- 1999-06-23 JP JP11177359A patent/JP2001007763A/ja active Pending
-
2000
- 2000-06-15 KR KR1020017002254A patent/KR20010072855A/ko not_active Application Discontinuation
- 2000-06-15 AU AU52475/00A patent/AU5247500A/en not_active Abandoned
- 2000-06-15 WO PCT/JP2000/003873 patent/WO2001001607A1/ja not_active Application Discontinuation
- 2000-06-15 EP EP00937230A patent/EP1107482A4/en not_active Withdrawn
- 2000-06-15 CN CN00801111A patent/CN1314032A/zh active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08307343A (ja) * | 1995-05-11 | 1996-11-22 | Oki Electric Ind Co Ltd | 無線通信装置 |
JPH10126337A (ja) * | 1996-10-18 | 1998-05-15 | Mitsubishi Electric Corp | 送信電力制御装置 |
Non-Patent Citations (1)
Title |
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See also references of EP1107482A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100379171C (zh) * | 2003-03-04 | 2008-04-02 | 株式会社Ntt都科摩 | 移动通信系统、无线控制装置、基地台及发送功率控制方法 |
Also Published As
Publication number | Publication date |
---|---|
AU5247500A (en) | 2001-01-31 |
CN1314032A (zh) | 2001-09-19 |
KR20010072855A (ko) | 2001-07-31 |
EP1107482A4 (en) | 2003-03-19 |
JP2001007763A (ja) | 2001-01-12 |
EP1107482A1 (en) | 2001-06-13 |
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