JP4613745B2 - Radio base station apparatus and delay time correction method thereof - Google Patents

Description

  The present invention relates to mobile radio communication, and more particularly, to a delay correction technique for a radio base station apparatus that performs radio communication with a mobile communication terminal apparatus.

Usually, location services such as Round Trip Time,
(A) the arrival time of a Down Link signal (TCP: Transmission Control Protocol) from the radio base station to the mobile communication terminal device; and
(B) the arrival time of the uplink signal (ACK: Acknowledgment) from the mobile communication terminal device to the radio base station device;
Based on the information, the determination of the waiting time (Retransmission Timer Value) of the confirmation response and the specification of the position are performed.

  For this reason, it is necessary to correct the delay time by correcting the deviation of the delay time generated in the radio base station apparatus and having the delay time in the same radio base station apparatus as information. Correction of the delay time in the radio base station apparatus is conventionally performed by measuring a deviation of the delay time by using a transmitter tester or the like and adjusting a delay amount by a delay time adjustment circuit. . For this reason, there are problems such as local human response (manual work) and the need for a measurement system.

  Further, the delay amount is corrected by the above correction method when the radio base station is installed, and it is necessary to stop and re-adjust the fluctuation of the delay amount in the radio base station due to secular change.

  In relation to such a problem, Patent Document 1 discloses a wireless reception device that uses an adaptive array antenna and performs calibration without degrading call quality. This radio receiving apparatus performs diversity reception instead of array antenna reception and performs calibration by separating the array radio reception means from the antenna when diversity reception can ensure reception quality equivalent to array antenna reception. is there. In other words, diversity reception quality monitoring means for monitoring the reception quality of diversity reception, and array reception quality monitoring means for monitoring the reception quality of array antenna reception performed by the array radio reception means and the array signal processing means, When the reception quality is equal to the reception quality of the array antenna reception, the demodulated signal switching means is instructed to select the output of the diversity receiving means, and the calibration signal switching means is instructed to select the calibration signal. is doing.

  Further, as a related technique, Patent Document 2 discloses that a calibration signal is generated in a burst manner, multiplexed to a user transmission signal or a user reception signal, and supplied to a wireless transmission / reception unit during operation to obtain a certain calibration accuracy. An array antenna transmission / reception apparatus is disclosed in which the transmission power of a calibration signal is minimized and the calibration interval is made as long as possible, thereby suppressing an increase in interference wave components and obtaining an excellent quality transmission / reception unit.

Japanese Patent Laid-Open No. 2001-156688 JP 2002-353865 A

  In Patent Document 1, the reception quality of array antenna reception and diversity reception is monitored, and if the reception quality of diversity reception is equivalent to the reception quality of array antenna reception, the result of diversity reception is replaced with the result of array antenna reception to generate a demodulated signal. The calibration signal is input to each array radio receiving means, and the correction amount of amplitude fluctuation and phase shift of each array radio receiving means is obtained based on the output of each array radio receiving means. However, in order to adjust the delay amount, the system is complicated, and there is a possibility that applicable apparatuses are limited.

  On the other hand, the inventor of the present application can correct the transmission delay time in the radio base station apparatus without interrupting the service in consideration of the operation state with respect to fluctuations in the transmission delay time in the radio base station apparatus. A wireless base station apparatus that can perform accurate position detection has been invented as a prior application technique (Japanese Patent Application No. 2004-093530). The delay time correction method in this technique is based on the temperature fluctuation and the fluctuation of the transmission delay time in the radio base station apparatus due to the secular change. By correcting the delay time, accurate position detection can be performed.

  By the way, the delay time fluctuation of the radio base station apparatus can occur not only on the transmitting side but also on the receiving side. Accordingly, the prior application technique for performing delay time correction on the transmission side cannot perform delay time correction on the reception side, and is not necessarily sufficient as delay time correction for the entire radio base station apparatus.

A radio base station apparatus according to one aspect of the present invention includes a plurality of receiver units and an information monitoring unit. The information monitoring unit monitors the operation status of each of the plurality of receiver units, finds a predetermined receiver unit serving as one of the diversity systems in which the received signal level value is greater than a predetermined threshold , and the receiver Control to input a predetermined correction signal to the unit, and the predetermined receiver unit inputs the correction signal instead of the signal received from the antenna unit, and corrects the reception delay time based on the correction signal To do.

A radio base station apparatus according to another aspect of the present invention includes a plurality of antenna units that receive radio waves from a mobile device, a switch unit connected to the plurality of antenna units, and a plurality of antenna units via the switch unit. A plurality of receiver units that receive the received signals respectively supplied from the information monitoring unit that monitors the operation status of each of the plurality of receiver units, and a switch unit that generates a correction signal having a fixed data pattern. And a correction signal generation unit that outputs to the receiver unit. The information monitoring unit monitors a plurality of receiver units, finds a predetermined receiver unit that constitutes one of the diversity systems in which a received signal level value is greater than a predetermined threshold , and switches to the receiver unit. And a correction signal is supplied instead of the reception signal from the antenna unit, and the control is performed so as to correct the reception delay time based on the delay amount of the correction signal in the receiver unit.

  In the radio base station apparatus according to the first development form, the information monitoring unit may find a predetermined receiver unit by monitoring a reception level in each of the plurality of receiver units.

  In the radio base station apparatus of the second development form, the information monitoring unit may monitor the absolute delay time in each of the plurality of receiver units and adjust the reception delay time in the radio base station apparatus.

  In the radio base station apparatus according to the third deployment mode, the receiver unit includes a radio frequency unit, a delay correction unit, a data control unit, and a delay control unit, and the radio frequency unit is based on an input modulation signal. An AGC amplifier that outputs the converted main signal to the delay correction unit and keeps the output level of the main signal constant is provided, and an adjustment amount of the AGC amplifier is given to the data control unit. A delay based on the delay correction value is given to the output main signal and output to the data control unit, and the data control unit calculates the reception level from the adjustment amount of the AGC amplifier output by the radio frequency unit and receives it as reception level information Output to the information monitoring unit and take out the reception data signal for delay time correction by the main signal delay-corrected by the delay correction unit and the control information from the information monitoring unit, the delay control unit is a data control unit Therefore by the control trigger information from the received data signal and the information monitoring unit of the delay time correction taken may calculate the delay correction value required for correction.

  In the radio base station apparatus according to the fourth deployment mode, the data control unit includes a database unit, a data matching unit, and a reception level calculation unit, and the database unit corrects based on control information from the information monitoring unit. Signal data is output to the data verification unit. The data verification unit compares the delay-corrected main signal input from the delay correction unit based on the correction signal data, extracts the head portion of the signal, and performs delay control. The reception level calculation unit calculates the received signal level from the adjustment amount of the AGC amplifier given from the radio frequency unit, and outputs it as reception level information to the information monitoring unit. It may be.

  In the radio base station apparatus according to the fifth embodiment, the delay control unit includes a timing comparator, a delay value offset unit, and a memory unit, and the timing comparator receives the received data signal and information from the data control unit. The control trigger information from the monitoring unit is compared, delay correction information is output to the delay value offset unit, correction value information is output to the memory unit, and the delay value offset unit should be corrected based on the delay correction information The delay amount may be determined and output to the delay correction unit as a delay correction value, and the memory unit may store the correction value information and output it to the information monitoring unit as reception delay information.

A radio base station apparatus delay time correction method according to an aspect of the present invention is a radio base station apparatus delay time correction method including a plurality of receiver units and an information monitoring unit. In this method, the information monitoring unit monitors the operation status of each of the plurality of receiver units, and finds a predetermined receiver unit that is one of the systems constituting a diversity system in which the received signal level value is greater than a predetermined threshold value. And a step of controlling the information monitoring unit to input a predetermined correction signal to the predetermined receiver unit, and a step of inputting the correction signal instead of the signal received by the predetermined receiver unit from the antenna unit. And a step in which a predetermined receiver unit corrects the reception delay time based on the correction signal.

A radio base station apparatus delay time correction method according to another aspect of the present invention includes a plurality of antenna units that receive radio waves received from a mobile device, a switch unit connected to the plurality of antenna units, and a switch unit. A plurality of receiver units that receive received signals respectively supplied from a plurality of antenna units, an information monitoring unit that monitors the operational status of each of the plurality of receiver units, and a correction signal having a fixed data pattern And a correction signal generation unit that outputs the correction signal to the receiver unit via the switch unit. In this method, the information monitoring unit monitors a plurality of receiver units and finds a predetermined receiver unit that is one of the diversity systems in which the received signal level value is greater than a predetermined threshold, and the information monitoring unit Controlling the switch unit to a predetermined receiver unit to supply a correction signal instead of the reception signal from the antenna unit, and the predetermined receiver unit delays the correction signal in the predetermined receiver unit. Correcting the reception delay time based on the quantity.

  According to the present invention, the reception delay time in the radio base station apparatus can be reduced without interrupting the service in consideration of the operation state with respect to fluctuations in the reception delay time in the radio base station apparatus due to temperature fluctuations and secular changes. By correcting the position, accurate position detection can be performed.

  The radio base station apparatus (1 in FIG. 1) according to the embodiment of the present invention is an information monitoring unit (2 in FIG. 1) and a data control unit (10a to 10n in FIG. 1) in each receiver unit (1 in FIG. 1). The operational status reported from 4) is constantly monitored, and a controllable receiver is selected according to the operational status. Specifically, a receiver unit that is one of diversity systems under a situation where the received signal level value is high is selected as a correction target. The control trigger signal is generated and output to the receiver unit to be corrected, and the correction signal generating unit (7 in FIG. 1) and the switch unit (8 in FIG. 1) are controlled. On the other hand, a correction signal output from the correction signal generation unit (7 in FIG. 1) is input instead of the main signal received from the antenna unit (9a in FIG. 1). Then, in the delay control unit (3 in FIG. 1) of the receiver unit, the control trigger signal from the information monitoring unit (2 in FIG. 1) and the correction signal received by the data control unit (4 in FIG. 1) The reception delay time is calculated by comparing the data pattern. Further, the delay time in the receiver unit is corrected based on the calculated reception delay time.

  The radio base station apparatus having such a configuration controls the diversity system according to the reception state, thereby reducing the reception delay time in the radio base station apparatus without interrupting the service in consideration of the operation state. to correct.

  In the reception delay time correction method in the present invention, the fluctuation in the reception delay time in the base station apparatus due to temperature fluctuation and secular change is considered in the radio base station apparatus without interrupting the service in consideration of the operation state. By correcting the delay time of the receiving system, accurate position detection can be performed. Hereinafter, it will be described in detail with reference to the drawings in accordance with embodiments.

  FIG. 1 is a block diagram showing a configuration of a radio base station apparatus according to an embodiment of the present invention. In FIG. 1, a radio base station apparatus 1 includes an information monitoring unit 2, a plurality of receiver units 10a to 10n under the monitoring of the information monitoring unit 2, a correction signal generating unit 7, a switch (SW) unit 8, an antenna. Elements 9a to 9n are provided. Here, the receiver units 10a to 10n have the same configuration, and FIG. 1 illustrates the internal configuration of one receiver unit including a plurality of receiver units 10a. The receiver units 10 a to 10 n include a delay control unit 3, a data control unit 4, a delay correction unit 5, and a radio frequency unit (RF unit) 6. The radio base station apparatus 1 has other transmission functions, a connection control function with other higher-level apparatuses, and the like, but the description thereof is omitted because it is not related to the present invention.

  The information monitoring unit 2 comprehensively monitors the operating state of the receiver units 10a to 10n, and collects reception level information 24a to 24n and reception delay information 22a to 22n from the receiver units 10a to 10n, respectively. Then, control trigger signals 21a to 21n and control information 23a to 23n are output to the receiver units 10a to 10n according to the reception level states of the receiver units 10a to 10n, respectively. For example, if the receiver unit to be corrected is the receiver unit 10a, the information monitoring unit 2 and the correction signal generating unit 7 and the switch so that the correction signal is input to the receiver unit 10a. The control unit 8 is controlled so that the correction reference signal 28 generated by the correction signal generation unit 7 is switched to the modulation signal 26a from the antenna element 9a and input to the receiver unit 10a. On the other hand, simultaneously with the switching in the SW unit 8, the control trigger signal 21a is output to the delay control unit 3 in the receiver unit 10a.

  The delay control unit 3 has a function of calculating a delay correction value 13 necessary for correction based on the received data signal 14 for delay time correction extracted by the data control unit 4 and the control trigger information 21 a from the information monitoring unit 2. That is, the delay control unit 3 calculates the reception delay time by comparing the control trigger signal 21a from the information monitoring unit 2 with the data pattern of the reception data signal 14 received by the data control unit 4, and the radio base station The delay correction value 13 is output to the delay correction unit 5 so that the delay time is corrected so that the receiver units 10a to 10n in the station apparatus 1 have the same delay time.

  The data control unit 4 calculates the reception level of the receiver unit 10a from the AGC amplifier adjustment amount 17 output from the RF unit 6, and outputs the reception level information 24a to the information monitoring unit 2. Further, the received data signal 14 serving as a reference signal for delay time correction is extracted from the main signal 16 subjected to delay correction and the control information 23 a from the information monitoring unit 2, and is provided to the delay control unit 3. Further, the data control unit 4 always calculates the reception level information 24 a based on the AGC amplifier adjustment amount 17 and reports it to the information monitoring unit 2.

  The delay correction unit 5 gives a delay based on the delay correction value 13 to the main signal 15 output from the RF unit 6 and outputs the main signal 16 to the data control unit 4.

  The RF unit 6 includes devices such as an analog / digital converter (ADC), a mixer, a band limiting filter (BPF), an amplifier, an AGC amplifier, and a coupler (not shown). The AGC amplifier operates so that the ADC input is always kept constant. The RF unit 6 down-converts the input signal and outputs the main signal 15 converted to digital data to the delay correction unit 5. Further, the AGC amplifier output is kept constant, and an AGC amplifier adjustment amount 17 serving as a reference for calculating the reception level is given to the data control unit 4.

  The correction signal generation unit 7 is a correction reference signal that is a modulation signal having a data pattern such as fixed amplitude information and code information equivalent to the database unit (41 in FIG. 2) mounted in the data control unit 4. 28 is generated. Then, in response to the output instruction signal 27 from the information monitoring unit 2, a correction reference signal 28 is output to the switch (SW) unit 8.

  The switch (SW) unit 8 outputs the modulation signals 26a to 26n from the antenna elements 9a to 9n to the receiver units 10a to 10n as modulation signals 25a to 25n, respectively. Further, in response to the switch control signal 29 output from the information monitoring unit 2, the correction reference signal 28 is output to the selected receiver unit instead of one of the modulation signals 26a to 26n. For example, the correction reference signal 28 is output as the modulation signal 25a to the receiver unit 10a instead of the modulation signal 26a.

  The antenna elements 9a to 9n receive radio waves from the mobile devices, respectively, and output them to the switch (SW) unit 8 as modulation signals 26a to 26n.

  Next, details of the delay control unit 3 and the data control unit 4 will be described. FIG. 2 is a block diagram showing the internal configuration of the delay control unit 3 and the data control unit 4. In FIG. 2, the delay control unit 3 includes a timing comparator 31, a memory unit 32, and a delay value offset unit 33. The timing comparator 31 compares the received data signal 14 from the data control unit 4 with the control trigger information 21 a from the information monitoring unit 2, outputs delay correction information 35 to the delay value offset unit 33, and corrects correction value information 36. Is output to the memory unit 32. The delay value offset unit 33 determines a delay amount to be corrected based on the delay correction information 35 and outputs the delay amount to the delay correction unit 5 as the delay correction value 13. The memory unit 32 stores the correction value information 36 and outputs it to the information monitoring unit 2 as reception delay information 22a.

  The data control unit 4 includes a database unit 41, a data collation unit 42, and a reception level calculation unit 43. The database unit 41 outputs the correction signal data 37 to the data collating unit 42 based on the control information 23 a from the information monitoring unit 2. Based on the correction signal data 37, the data matching unit 42 compares the delay-corrected main signal 16 input from the delay correction unit 5, extracts the head portion of the signal, and sends the received data signal to the delay control unit 3. 14 is output. The reception level calculation unit 43 calculates the signal level received from the AGC amplifier adjustment amount 17 given from the RF unit 6, and always outputs it to the information monitoring unit 2 as reception level information 24a.

  The radio base station apparatus 1 configured as described above is applied to the reception part in the radio base station apparatus using the CDMA system. The radio base station apparatus 1 includes a plurality of antenna elements 9a to 9n, and a reception diversity configuration is formed for every two antenna elements. Here, it is assumed that the receiver unit 10a and the receiver unit 10b form a reception diversity function. The modulation signal 26a input from the antenna element 9a passes through the SW unit 8 and is input to the RF unit 6 as the modulation signal 25a. The main signal 15 converted into digital data by the RF unit 6 is input to the delay correction unit 5, subjected to delay according to the delay correction value 13 provided from the delay control unit 3, and data control is performed as a delay-corrected main signal 16. Is output to the unit 4.

  On the other hand, when the reception level calculated by the data control unit 4 in the receiver 10a monitored by the information monitoring unit 2 is in an operating state at a certain threshold value α, the information monitoring unit 2 generates a correction signal. An output instruction signal 27 is output to instruct the output of the correction reference signal 28 having a fixed data pattern to the unit 7. The correction signal generator 7 that has received the output instruction signal 27 outputs a correction reference signal 28 to the SW unit 8. The correction reference signal 28 is a modulated wave to which a code is assigned as in other main signal systems.

  In addition, the information monitoring unit 2 outputs a switch control signal 29 to the SW unit 8 so that the receiver unit 10a receives the modulated signal 26a from the antenna element 9a. When switching is performed by the SW unit 8, the correction reference signal 28 is input to the RF unit 6 instead of the modulation signal 26a from the antenna element 9a. The input correction reference signal 28 passes through the delay correction unit 5 and is input to the data control unit 4 in the same manner as a normal main signal. The input main signal 16 is a data database equivalent to the data used in the correction signal generator 7 based on the control information 23a from the information monitor 2 in the data collator 42 in the data controller 4. The head position of the data is extracted by collating with the correction signal data 37 selected from the unit 41 and output to the timing comparator 31 as the reception data signal 14.

  The timing comparator 31 calculates an absolute delay time Td from the control trigger signal 21a to the head data of the received data signal 14 as shown in FIG. Data stored in the memory unit 32 is monitored by the information monitoring unit 2, and the information monitoring is performed so that the reception delay times of the receiver units 10a to 10n are all equal or every two sets constituting the reception diversity are equal. The delay value offset unit 33 in the delay control unit 3 is controlled by the control information 23a from the unit 2 via the data control unit 4 to determine a correction value to be given to the delay correction unit 5. In the delay correction unit 5, delay correction based on the delay correction value 13 is performed on the main signal 15 output from the RF unit 6.

  As described above, switching is performed in a state where the reception level of the main signal is sufficiently obtained, and the delay is performed without affecting the operation state because the switching is performed in a state where only the other system with diversity is sufficiently receivable. The time can be adjusted.

  The radio base station apparatus configured as described above is a radio base station that considers the operation state with respect to fluctuations in reception delay time in the radio base station apparatus due to temperature fluctuations or secular changes, and without interrupting the service. By correcting the reception delay time in the apparatus, it is possible to perform accurate position detection.

It is a block diagram which shows the structure of the wireless base station apparatus based on the Example of this invention. It is a block diagram which shows the structure of a delay control part and a data control part. It is a figure showing the timing in a timing comparator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radio base station apparatus 2 Information monitoring part 3 Delay control part 4 Data control part 5 Delay correction part 6 Radio frequency part (RF part)
7 Correction signal generation unit 8 SW units 9a to 9n Antenna elements 10a to 10n Receiver unit 13 Delay correction value 14 Received data signal 15 and 16 Main signal 17 AGC amplifier adjustment amount 21a to 21n Control trigger signal 22a to 22n Reception delay information 23a-23n Control information 24a-24n Reception level information 25a-25n, 26a-26n Modulation signal 27 Output instruction signal 28 Correction reference signal 29 Switch control signal 31 Timing comparator 32 Memory unit 33 Delay value offset unit 35 Delay correction information 36 Correction value information 37 Correction signal data 41 Database unit 42 Data collation unit 43 Reception level calculation unit

Claims (9)

A plurality of receiver units and an information monitoring unit;
The information monitoring unit monitors the operation status of each of the plurality of receiver units, finds a predetermined receiver unit that is one of the systems constituting a diversity system in which a received signal level value is greater than a predetermined threshold , Control to input a predetermined correction signal to the receiver unit,
The radio base station apparatus, wherein the predetermined receiver unit inputs the correction signal instead of a signal received from an antenna unit, and corrects a reception delay time based on the correction signal. A plurality of antenna units for receiving radio waves received from mobile devices;
A switch unit connected to the plurality of antenna units;
A plurality of receiver units for receiving reception signals respectively supplied from the plurality of antenna units via the switch unit;
An information monitoring unit for monitoring the operational status of each of the plurality of receiver units;
A correction signal generation unit that generates a correction signal having a fixed data pattern and outputs the correction signal to the receiver unit via the switch unit;
With
The information monitoring unit monitors the plurality of receiver units, finds a predetermined receiver unit that constitutes one of the diversity systems in which a received signal level value is greater than a predetermined threshold , and for the receiver unit Control the switch unit to supply the correction signal instead of the reception signal from the antenna unit, and to control the reception delay time based on the delay amount of the correction signal in the receiver unit A radio base station apparatus.   The radio base station according to claim 1, wherein the information monitoring unit monitors an absolute delay time in each of the plurality of receiver units and adjusts the reception delay time in the radio base station device. apparatus. The receiver unit is
A radio frequency section;
A delay correction unit;
A data control unit;
A delay control unit;
With
The radio frequency unit includes an AGC amplifier that outputs a main signal converted from an input modulation signal to the delay correction unit and keeps an output level of the main signal constant, and the amount of adjustment of the AGC amplifier is controlled by the data control Give to the department,
The delay correction unit gives a delay based on a delay correction value to the main signal output from the radio frequency unit and outputs the delay to the data control unit,
The data control unit calculates the reception level from the adjustment amount of the AGC amplifier output from the radio frequency unit, outputs the reception level as reception level information to the information monitoring unit, and delay-corrected by the delay correction unit The received data signal for delay time correction is taken out by the signal and the control information from the information monitoring unit,
The delay control unit calculates the delay correction value necessary for correction based on a reception data signal for delay time correction extracted by the data control unit and control trigger information from the information monitoring unit. The radio base station apparatus according to claim 1 or 2. The data control unit
A database section;
A data verification unit;
A reception level calculation unit;
With
The database unit outputs correction signal data to the data verification unit based on control information from the information monitoring unit,
The data collating unit compares the delay-corrected main signal input from the delay correcting unit based on the correction signal data, extracts a head portion of the signal, and outputs the signal to the delay control unit as a received data signal And
The reception level calculation unit calculates a signal level received from an adjustment amount of the AGC amplifier given from the radio frequency unit, and outputs the signal level as reception level information to the information monitoring unit. Item 5. The radio base station apparatus according to Item 4 . The delay control unit
A timing comparator;
A delay value offset part;
A memory section;
With
The timing comparator compares a received data signal from the data control unit with control trigger information from the information monitoring unit, outputs delay correction information to the delay value offset unit, and outputs correction value information to the memory unit. Output to
The delay value offset unit determines a delay amount to be corrected based on the delay correction information, and outputs a delay correction value to the delay correction unit.
The radio base station apparatus according to claim 4 , wherein the memory unit stores the correction value information and outputs the correction value information to the information monitoring unit as reception delay information. A wireless base station apparatus delay time correction method comprising a plurality of receiver units and an information monitoring unit,
The information monitoring unit monitoring the operation status of each of the plurality of receiver units to find a predetermined receiver unit serving as one of the diversity systems in which a received signal level value is greater than a predetermined threshold ; and
Controlling the information monitoring unit to input a predetermined correction signal to the predetermined receiver unit;
Inputting the correction signal instead of the signal received by the predetermined receiver unit from the antenna unit;
The predetermined receiver unit correcting the reception delay time based on the correction signal;
A delay time correction method for a radio base station apparatus, comprising: A plurality of antenna units for receiving radio waves received from mobile devices;
A switch unit connected to the plurality of antenna units;
A plurality of receiver units for receiving reception signals respectively supplied from the plurality of antenna units via the switch unit;
An information monitoring unit for monitoring the operational status of each of the plurality of receiver units;
A correction signal generation unit that generates a correction signal having a fixed data pattern and outputs the correction signal to the receiver unit via the switch unit;
A delay time correction method for a radio base station apparatus comprising:
The information monitoring unit monitoring the plurality of receiver units to find a predetermined receiver unit which is one of the systems constituting a diversity system having a received signal level value larger than a predetermined threshold ;
The information monitoring unit controlling the switch unit to the predetermined receiver unit to supply the correction signal instead of the received signal from the antenna unit;
The predetermined receiver unit correcting the reception delay time based on a delay amount of the correction signal in the predetermined receiver unit;
A delay time correction method for a radio base station apparatus, comprising: The radio base station according to claim 7 or 8 , wherein the information monitoring unit monitors an absolute delay time in each of the plurality of receiver units and adjusts the reception delay time in the radio base station device. Device delay time correction method.

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