JP2001251237A - Test unit for wireless base station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a test unit for wireless base station that can prevent deterioration in the quality of a speech in operation associated with radio wave interference and can test confirmation of the operation of a function, corresponding to each sector of a transmitter-receiver. SOLUTION: In the operation confirmation test as to an incoming system of a sector 1, when a mobile unit side control section 21 transmits a switching control signal and a test start signal to a high-frequency relay 12b, the relay 12b reaches a connection state accompanying the reception of the switching control signal. Whereas, a mobile unit 22 receiving a transmission start signal transmits an incoming signal for test to a coarse coupling terminal of a coupler 11b, placed in the incoming system of the sector 1 via the high frequency relay 12b in the connection state. A transmission reception section 44 converts the frequency of an RF band of the incoming signal sent from the coupler 11b into a frequency of an IF band, and a signal processing section 45 decodes the signal, transmits the decoded signal to a transmitter-receiver side control section 46, which discriminates whether the incoming signal has been decoded normally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio base station test apparatus, and more particularly to a radio base station for performing an operation test of a base station transmitting / receiving apparatus having a plurality of sectors used in a mobile communication system employing a CDMA communication system. Station testing equipment.

[0002]

2. Description of the Related Art With the recent progress of communication technology, many access control systems in the field of mobile communication have been proposed and adopted. For example, a TDMA (Time division) is used in an access control method conventionally used.
There is a multiple access (time division multiple access) communication system.

The TDMA system controls transmission timing of signal bursts transmitted from scattered ground stations so as to adjust each signal in a satellite repeater so as not to overlap with each other. Therefore, other access control schemes, for example, FD for distinguishing a plurality of mobile stations in one base station by using different frequencies from each other
Compared with the MA (Frequency Division Multiple Access) communication system, the flexibility of channel assignment to each ground station is high, and satellite power can be used more effectively.

[0004] Another access control method is CDMA (Code di- code), which is expected to be put into practical use in the mobile phone industry.
There is a vision multiple access (code division multiple access) communication system. The CDMA system uses a PN (pseudo-nois) specific to a user communication channel.
e: pseudo-noise) code allows a plurality of users to share the same frequency band.

[0005] Therefore, the CDMA system not only can increase the number of user channels per bandwidth but also has a wider transmission frequency than the TDMA system, and thus is more resistant to frequency-selective fading due to a multipath signal (ghost). Unless the same PN code as used at the time of transmission is used, demodulation cannot be performed.

By the way, a radio base station, which is a radio access node constituting a mobile communication system, realizes high-sensitivity radio communication and covers a wide area.
There is a configuration in which a reception amplification device is provided outdoors separately from a transmission / reception device installed indoors, and these devices are connected by a feeder line (transmission line). When an operation check test is performed on a TDMA communication type wireless base station having such a configuration in which the receiving amplifier is separated outdoors, a conventional test mobile station (T
TR) is used.

On the other hand, CDMA wireless base stations, which have become more and more widespread in recent years, are increasingly equipped with a receiving amplifier separated and installed outdoors, and it is necessary to conduct an operation test on this wireless base station. There is. Therefore, a case where an operation test of a CDMA wireless base station is performed using the above-described test mobile station will be described with reference to FIG.

As shown in FIG. 1, a radio base station is a tower-type receiving amplifier 100a and 100b provided outdoors.
And a transmission / reception device (TRE) 200 installed indoors. Then, the operation test of the wireless base station is performed by the test mobile station 300. In the figure,
Although the two receiving amplifiers 100 (100a and 100b) are provided, the number is not limited to two and can be provided as many as the number of sectors managed by the radio base station. However,
In this specification, for convenience of explanation, it is assumed that two tower-type reception amplification devices 100 are provided.

Here, the receiving amplifier 100a is assigned the sector 1, and receives a transmitting / receiving antenna 110a, a receiving-only antenna 120a, and a transmitting / receiving duplexer (DUP) 130.
a, a band-pass filter (BPF) 140a, a receiving amplifier (0 system) 150a, and a receiving amplifier (1 system) 160a
And The receiving amplifier 100b is assigned the sector 2, and has the same internal configuration as the receiving amplifier 100a.

The transmitting / receiving device 200 includes a transmission amplifier (TP)
A) 210, distributor (0 system) 220, and distributor (1
System) 230, a transmission / reception unit (TRX) 240, a signal processing unit (CH) 250, and a transmission / reception device-side control unit (CONT)
260. Test mobile unit (TTR) 300
Is a mobile device side control unit (CONT) 310, a mobile device (MS) 320 similar to a general mobile device, a receiving unit 230,
It comprises a TR antenna 340 and a port 350.

FIG. 8 shows a CDM having such a structure.
The operation test of the A-type radio base station is performed in the following procedure. It is assumed that the coupling amount between the TTR antenna 340 and each of the antennas 110a and 120a of the sector 1 is -30 dB, the coupling amount between the TTR antenna 340 and the sector 2 is -30 dB.
Is assumed to be -50 dB between the antenna 110b and the antenna 120b.

That is, it is assumed that the coupling amount between the TTR antenna 340 and the sector antenna differs for each sector. It is also assumed that the sector selection signal transmitted from the transmitting / receiving device-side control unit 260 to the mobile device-side control unit 310 selects sector 1.

First, when performing a downlink test, a downlink signal (downlink radio wave) obtained by multiplexing a control channel and a communication channel at the same frequency from each of the operating sector 1 antenna 110a and sector 2 antenna 110b is used. Is fired. The downlink signal fd1 emitted from the antenna 110a and the downlink signal f emitted from the antenna 110b
Assuming that each of the output signals d2 has the same output at the time of firing, the downlink signal f
d1 is a power level higher by 20 dB (100 times) than the downlink signal fd2, and is transmitted to the port 3 via the TTR antenna 340.
50 will be reached.

In this operation test, sector 1 is selected. Therefore, the test mobile device 300 receives an arbitrary channel included in the downlink signal fd1. Since the power level is higher than that of the downlink signal fd2 as described above, decoding of the downlink signal fd1 becomes possible.

The test mobile station 300 checks whether or not decoding of the downlink signal fd1 has been made normal. The result of the confirmation is used as a confirmation signal as a test mobile unit 3.
00 through the transmission / reception device 200, the transmission / reception device 200
, For example, a base station controller (BS not shown)
C). In the host device, it is determined whether or not the signal control function in the downlink of the sector 1 is operating normally based on the confirmation result indicated by the received confirmation signal.

On the other hand, in the case of performing an uplink test, an uplink signal fu1 encoded by a predetermined signal of an opposing channel is emitted from the TTR antenna 340 of the test mobile station 300. Fired up signal fu1
Is received by the reception antenna 120a and transmitted from the reception amplification device 100a to the transmission / reception device 200.

The upstream signal fu1 is decoded in the signal processing section 250 of the transmitting / receiving apparatus 200, and it is confirmed in the transmitting / receiving apparatus-side control section 260 whether or not the decoding is normal. The result of the confirmation is transmitted as a confirmation signal from the transmitting / receiving device-side control section 260 to the higher-level device. In this host device, based on the confirmation result indicated by the received confirmation signal,
It is determined whether the operation state of the signal control function in the uplink of the sector 1 is normal.

[0018]

However, when the downlink system of the sector 2 is tested in the same situation as the above-described downlink system test of the sector 1, both the sector 1 and the sector 2 are operating and Assuming that the power levels of the downlink signal fd1 and the downlink signal fd2 are the same, the downlink signal fd2
Is masked by the downlink signal fd1.
The downlink signal fd2 could not be decoded.

In the above description of the test operation, the number of sectors is set to two. For example, when the number of sectors is set to six, the number of the antennas for the receiving amplification device and the TTR antenna 340 for the added four sectors is increased. Even if the respective coupling amounts are unified to -50 dB, the interference increases by the increased number of sectors (6 dB). Therefore, the operation test for sector 2 can be further performed than when the number of sectors is two. It was not possible.

On the other hand, when performing an uplink test, it is assumed that the transmitting / receiving apparatus-side control unit 260 determines that the sector 2 is located at a point that is 20 dB farther than the sector 1 due to the assumed coupling amount. Is determined. Therefore,
For example, when communication is performed between the test mobile device 300 and the sector 2, power control control of increasing the level of the uplink signal of the test mobile device 300 is performed.

Therefore, when testing the sector 2, the level of the uplink signal received in the sector 1 enters at a level 20 dB stronger than the uplink signal received in the test of the sector 1 itself. Therefore, the transmission / reception unit 24 that has received the strong level uplink signal
0, the signal processing unit 250 is to be subjected to reception sensitivity suppression. Note that this reception sensitivity suppression is performed by N-CDMA.
In the case of a system, it is about 3 dB.

As described above, in the CDMA communication system, all sectors use the same frequency and thus interfere with each other.
When a test mobile station for performing an operation test of the A-method radio base station is used, the sector to be tested in both the downlink system and the uplink system receives interference from other sectors, and the operation confirmation test cannot be performed. The problem had arisen.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is intended to prevent the deterioration of speech quality during operation due to radio wave interference and to confirm the operation of a signal control function corresponding to each sector of a transmitting / receiving apparatus. An object of the present invention is to provide a low-cost CDMA wireless base station test apparatus that enables a test and has a simple configuration.

A conventional example of a test apparatus for a radio base station adopting the CDMA system is disclosed in JP-A-11-136175.
Discloses a CDMA wireless base station apparatus and a receiving system test method thereof. CDM disclosed in this publication
An A-method radio base station apparatus and a reception system test method thereof use a transmission signal of an RF frequency band (eg, 800 MHz band) emitted from a test mobile station and received in a reception system of the radio base station by a baseband frequency divider. Band (1MHz ~
At the stage where the frequency is converted to 5 MHz, interference measures are taken.

For this reason, interference in the RF frequency band, for example, interference to a general mobile station at the moment when a transmission signal is emitted, and after entering a call state, a closed loop from a radio base station apparatus for testing. It was possible that the mobile station would continue to interfere until it was controlled to the specified transmit signal level. Also, since interference in the RF frequency band cannot be prevented, the transmission signal from the test mobile device is excessive, which may affect the operation of the transceiver. Therefore, even in this conventional example, the object of the present invention for taking measures against interference in the RF frequency band could not be achieved.

[0026]

To achieve this object, a radio base station test apparatus according to claim 1 of the present invention comprises an antenna unit for transmitting and receiving a communication signal, and a communication signal transmitted and received by the antenna unit. A transmission line for carrying, and a transmission / reception device having a frequency conversion unit for performing frequency conversion of a communication signal carried by the transmission line and a communication signal transmission unit for transmitting a downstream communication signal and transmitting the communication signal to the frequency conversion unit are provided. What is claimed is: 1. A radio base station test apparatus for performing an operation check test on a CDMA radio base station, comprising: a test signal transmitting section for transmitting a test signal; a test signal transmitting path for transmitting a test signal transmitted from the test signal transmitting section; A coupling unit for coupling the test signal transmission path and the transmission line, a test signal transmitted from the test signal transmission unit and carried by the transmission line via the coupling unit, and / or A decoding unit that receives a downlink communication signal transmitted from the communication signal transmission unit and carried by the test signal transmission path via the coupling unit, and decodes any channel included in the test signal and the downlink communication signal; And a confirmation unit for confirming whether or not the decoding unit has successfully decoded an arbitrary channel included in the test signal and the downlink communication signal.

With such a configuration in which the radio base station test apparatus is provided with a coupling section for coupling the transmission line and the test signal transmission path, the radio frequency band (RF frequency band) before the transmission / reception apparatus performs frequency conversion. Can take countermeasures against interference. Therefore, the operation test of the radio base station can be performed without deteriorating the communication quality during operation. In addition, along with the interference prevention in the RF frequency band, it is possible to suppress the interference that cannot be completely eliminated by the countermeasures against the interference in the baseband frequency band after the conventional frequency conversion.

According to a second aspect of the present invention, there is provided a radio base station test apparatus, wherein the CDMA radio base station is provided with a receiving amplifier for amplifying a communication signal received at an antenna section on a transmission line, and The transmission line between the reception amplification device and the transmission / reception device is connected to a test signal transmission line.

If it is assumed that an operation check test can be performed on a wireless base station having such a configuration using a wireless base station test apparatus, for example, a wireless base station may be installed at the end of an antenna unit provided on a steel tower. Even without connecting the coupling part of the base station test device, the operation confirmation test can be performed near the receiving amplifier or transmitting / receiving device installed on the ground.

According to a third aspect of the present invention, in the wireless base station test apparatus, the CDMA wireless base station is provided with a plurality of transmission lines,
A test signal transmission path is provided with a plurality of branch transmission paths connected to each of the plurality of transmission lines, and each of the plurality of branch transmission paths is provided with a relay unit for connecting and disconnecting the branch transmission path, The base station test apparatus is configured such that the determination unit of the radio base station test apparatus receives a test signal or a communication signal passing through a transmission line selected as a target of an operation check test from a plurality of transmission lines. And a relay control unit for controlling a plurality of relay units.

When the radio base station test apparatus is configured as described above, the operation check can be performed by receiving only the test signal and the downlink communication signal transmitted on the transmission line targeted for the operation check test. . Therefore, it is possible to prevent interference affecting other sectors during the operation check test.

According to a fourth aspect of the present invention, in the radio base station test apparatus, the antenna unit includes a transmitting / receiving antenna for transmitting / receiving a communication signal, and a reception-only antenna for receiving only the communication signal. A downlink signal transmission line for transmitting a downlink communication signal transmitted from a communication signal transmission unit to a transmission / reception antenna, and a 0-system uplink signal transmission line for transporting a communication signal received by the transmission / reception antenna to a transmission / reception device;
A 1-system upstream signal transmission line that carries a communication signal received by the reception-only antenna to a transmission / reception device, and a plurality of branch transmission paths are first, second, and third branched from the test signal transmission path. Having a branch transmission path, the test signal transmission path branching the first branch transmission path from the test signal transmission path, and branching the test signal transmission path into second and third branch transmission paths A second relay unit that connects and disconnects the first branch transmission path, and a second relay unit that connects and disconnects the second branch transmission path. A first relay unit having a relay unit and a third relay unit for connecting and disconnecting the third branch transmission path, wherein the coupling unit couples the first branch transmission path and the downlink signal transmission line A second coupling unit that couples the second branch transmission path and the 0-system upstream signal transmission line; a third branch transmission path and the 1-system upstream signal And a third coupling unit that couples the transmission line with the transmission line, wherein the relay control unit is a transmission line to be subjected to an operation check test among the downlink signal transmission line, the 0-system uplink signal transmission line, and the 1-system uplink signal transmission line. The first relay connected to the
It is configured to control the operation of connecting and disconnecting the second relay unit and the third relay unit.

When the radio base station test apparatus has such a configuration, the cost of the test apparatus can be reduced because of a simple system configuration. Further, in consideration of the configuration of the transmission line including the downlink signal transmission line, the 0-system uplink signal transmission line, and the 1-system uplink signal transmission line, a branch transmission line and a relay unit connected to each of the transmission lines are provided, If the switching control of each relay unit is performed by the relay control unit, the test signal and the downstream communication signal can be transmitted only through the necessary transmission lines in the operation check test. For this reason, it is possible to prevent interference that affects other sectors during the operation check test.

According to a fifth aspect of the present invention, the first relay unit, the second relay unit, and the third relay unit are constituted by high-frequency relays. With such a configuration, a high-frequency relay having high isolation characteristics is controlled, only the transmission lines through which the test signal and the downstream communication signal pass are connected, and a path is secured, whereby the self-test during the operation test is performed. It is possible to suppress interference with the sector and other sectors, and also to prevent quality deterioration of a call by a general mobile station.

According to a sixth aspect of the present invention, the first relay unit, the second relay unit, and the third relay unit are configured by variable attenuators. With such a configuration, optimal isolation can be easily realized using a commercially available variable attenuator. Therefore, the interference level of the test signal leaked from the branch unit or the like during the operation test of the wireless base station can be attenuated, so that it is possible to prevent adverse effects on other sectors and reception at the transmitting / receiving apparatus.

Further, in the radio base station test apparatus according to the present invention, the first branch unit is constituted by a transmission / reception branching filter. With such a configuration in which the transmission / reception splitter used in the reception amplification device is provided in the branching unit, the isolation is improved, and the interference level of the leak signal generated during the test can be attenuated.

[0037]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] First, a first embodiment of a radio base station test apparatus according to the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a connection configuration when the wireless base station test apparatus of the present embodiment is used for an operation test of a wireless base station. 2 and 3 are a block diagram showing an internal configuration of a combiner and a test mobile station of a radio base station test apparatus, respectively, and FIGS. 4 and 5 are block diagrams showing internal configurations of a reception amplifier and a transmission and reception apparatus of a radio base station, respectively. FIG.

As shown in FIG. 1, the radio base station test apparatus according to the present embodiment includes a coupler (coupling unit) 10 and a test mobile station (TTR) 20. Further, the wireless base station includes a receiving amplifier (TOP AMP) 30 and a transmitting / receiving device (TRE) 40, and a feeder line (transmission line) 50.
Connected by

Here, it is assumed that the radio base station has a plurality of sectors used in a mobile communication system adopting the CDMA system, and adopts the space diversity reception system.

Although two receiving amplifiers 30 and two couplers 10 are provided in the figure, the number is not limited to two. That is, the receiving amplifier 30 is provided with the same number as the number of sectors so as to correspond to each sector in order to transmit and receive the signals communicated in the assigned sector among the signals handled by one wireless base station.

Since it is necessary to conduct an operation test for each sector, the same number of couplers 10 are provided as the number of receiving amplifiers 30 corresponding to each sector and connected to the feeder line 50. However, in this specification, for convenience of explanation, it is assumed that two reception amplification devices 30 and two couplers 10 are provided as shown in FIG.

The coupler 10 of the radio base station test apparatus is shown in FIG.
, Couplers (CPL) 11a (first coupling part), 11b (second coupling part) and 11c (third coupling part)
And a distributing / combining unit (H) 12a (first branch unit) and 12b
(Second branching unit), high-frequency relays 13a (first relay unit), 13b (second relay unit) and 13c (third relay unit) for disconnecting and connecting the transmission path of the test signal, and reception amplification The ports 14a, 14b and 14c on the device 30 side and the transmitting / receiving device 40
Side ports 15a, 15b and 15c, and ports 16 and 17 on the test mobile device 20 side.

Each of the couplers 11a, 11b and 11c has a terminal which is roughly coupled, and the coupling amount between the loosely coupled terminal and the main signal line is equal to the wavelength / 4 in the operating frequency band arranged inside. The length can be set to an arbitrary value by adjusting the distance between the coupling line and the main signal line. In the present specification, a test signal transmission path 60 for transmitting a test signal transmitted from a mobile device 22 of a test mobile device 20 described later to a coupler is provided in a coupling line.
However, the feeder line 50 corresponds to the main signal line.

The coupler 11a is connected to the port 14a and the port 15a, and the coupler 11b is connected to the port 14b and the port 1
5b, the coupler 11c has a port 14c and a port 15
c.

The distribution combiners 12a and 12b are paths for carrying the test signals transmitted from the test mobile device 20 to the couplers 11b and 11c and the downstream communication signals transmitted from the coupler 11a to the test mobile device 20. In the test signal transmission path 60, distribution of test signals and synthesis of downstream communication signals are performed. The wiring between the distributor / synthesizer 12a and the coupler 11a is connected to the first branch transmission path, and the wiring between the distributor / synthesizer 12b and the coupler 11b is connected to the second branch transmission path between the distributor / synthesizer 12b and the coupler 11c. The wiring is a third branch transmission path.

High frequency relays 13a, 13b and 13c
Are transmitted from the contact unit for disconnecting / connecting the first, second, and third branch transmission paths, respectively, and the mobile unit-side control unit 21 to be described later via the ports 26 and 16 of the test mobile unit 20. And a relay control unit that receives the switching control signal and controls the contact unit.

The high-frequency relays 13a, 13b and 1
As 3c, in the used band of 800 MHz to 2.5 GHz band, it is necessary to ensure low loss in the connected state and -60 dB or more as the isolation between the contacts in the disconnected state, using an RX relay commercially available from Matsushita Electric Works. realizable.

The high-frequency relay 13a can be provided between the distributor / combiner 12a and the port 17. In this case, the slight uplink signal emitted from the test mobile station 20 transmitted to the non-selected sector is further reduced by 60 d
Since B can be attenuated, interference with the receiving system of the transmitting / receiving device 40 can be further reduced. One of the ports 17 is connected to the distribution / combination unit 12a, and the other is connected to the test mobile device 20.

Test mobile station 20 of radio base station test apparatus
Is a mobile unit side control unit (CONT) 2 as shown in FIG.
1, a mobile station (MS) 22, and a distributor / combiner (H) 23
, Attenuators (ATT) 24a and 24b, and a combiner 10
It has ports 25a, 25b and 26 provided on the side, and a port 27 provided on the transmitting / receiving device 40 side.

The mobile station-side control section 21 is connected to a transmission / reception apparatus-side control section 46 described later via the port 27, and receives a sector selection signal transmitted from the transmission / reception apparatus-side control section 46. Further, upon receiving the sector selection signal, the mobile device side control unit 21 transmits a switching control signal to the high frequency relays 13a, 13b, and 13c of the coupler 10 via the port 26, and transmits a test start signal to the mobile device 22. Send to

Further, the mobile unit side control unit 21
It confirms whether or not the decoding of an arbitrary channel included in the downlink test signal in has been performed normally, and transmits the result of the confirmation to the host apparatus of the transmitting / receiving apparatus 40 (not shown) via the transmitting / receiving apparatus 40. That is, the mobile device side control unit 21 has a function as a confirmation unit.

The mobile unit 22 has the same function as a general mobile unit, and transmits a test uplink signal or receives a test downlink signal in accordance with an instruction from the mobile unit control unit 21. That is, it has a function as a test signal transmitting unit. Further, the mobile device 22 decodes an arbitrary channel included in the test downlink signal. That is, it has a function as a decoding unit.

The distributing / combining device 23 controls the crossroads so that the uplink signal transmitted from the mobile device 22 is transmitted to the coupler 10 provided in the sector indicated by the sector selection signal. Further, the downlink signal supplied to the mobile station 22 from each of the couplers 10 provided in each sector is synthesized. Attenuator 24
a and 24b are the ports 25a and 25b from the uplink signal transmitted from the distributor / synthesizer 23 and the coupler 10, respectively.
The level adjustment of the downlink signal transmitted via b is performed.

The receiving and amplifying device 30 is a tower-type receiving and amplifying device provided outdoors.
A reception-only antenna 32 and a transmission / reception splitter (DUP) 33
, A band-pass filter (BPF) 34, a reception amplifier (0 system) 35, a reception amplifier (1 system) 36, and a port 3
7a, 37b and 37c.

Note that, in FIG.
Although two (30a, 30b) are provided, the number is not limited to two and can be provided as many as the number of sectors managed by the radio base station. However, for convenience of explanation, it is assumed that two reception amplification devices are provided, and sector 1 is assigned to 30a and sector 2 is assigned to 30b.

The transmitting / receiving antenna 31 and the receiving-only antenna 32 have a function as an antenna unit employing a space diversity system. The space diversity method is a method in which two antennas are arranged slightly apart from each other, and the higher quality reception input of both antennas is switched and selected, or the reception input of the two antennas is combined and used. .

The transmission / reception splitter 33 has a function of separating a transmission signal and a reception signal constituting a communication signal, and performs band limitation.
For example, for a received signal, a signal belonging to a band other than the designated band is cut off. Among the communication signals, the transmission signal is received by the transmission / reception splitter 33 from the coupler 11a of the coupler 10 via the port 14a and the port 37a,
It is transmitted via the transmitting / receiving antenna 31a. On the other hand, when the reception signal is received via the reception trust antenna 31a, it is transmitted from the transmission / reception branching filter 33 to the reception amplifier (0 system) 35a.

The band-pass filter 34 limits the band of the communication signal received via the reception-only antenna 32a.
The signal is transmitted to the reception amplification section (system 1) 36. Receive amplifier (0
The system 35 and the reception amplifying unit (system 1) 36 amplify the power of the communication signals received by the transmission / reception antenna 31a and the reception antenna 32a, respectively. Then, the reception amplifier 35 transmits the amplified communication signal to the coupler 11b via the port 37b and the port 14b, and the reception amplifier 36 transmits the amplified communication signal to the coupler 11c via the port 37c and the port 14c.

The transmission / reception device 40 includes a transmission amplification unit (TPA) 41 having a power amplification function, a distributor (0 system) 42,
A distributor (system 1) 43, a transmitting / receiving unit (TRX) 44, a signal processing unit (CH) 45, a control unit (CONT) 46,
Ports 47a, 47b, 47c and 48 are provided. The transmission amplification unit 41 power-amplifies the communication signal transmitted from the transmission / reception unit 44, and performs port amplification on the port 47a and the port 15a.
To the coupler 11a via

The distributor (0-system) 42 transmits a communication signal received from the coupler 11b via the port 15b and the port 47b to the transmission / reception unit 44. The distributor (system 1) 43
The communication signal received from the coupler 11c via the port 15c and the port 47c is transmitted to the transmission / reception unit 44.

The transmission / reception unit (frequency conversion unit) 44 converts the frequency band of the communication signal. For example, for an uplink signal, an RF (radio frequency) at the time of reception is used.
y: Radio frequency (IF) band
In the case of a downstream signal, the IF band at the time of signal generation is converted to an RF band.

The signal processing section 45 performs despreading and decoding of the received signal and coding and spreading of the transmitted signal. That is,
It has the function of a decoding unit. Further, the signal processing unit 45 generates and transmits a transmission signal in response to a command from the transmission / reception device-side control unit 46. That is, it has a function of a communication signal transmitting unit.

When starting the operation test of the radio base station, the transmitting / receiving apparatus-side control section 46 transmits a sector selection signal to the mobile station-side control section 21 via the port 48 and the port 27. In addition, the transmission / reception device-side control unit 46 sends a transmission command of a test downlink signal to the signal processing unit 45 when performing a downlink system test.

Further, the transmission / reception device-side control unit 46 confirms whether or not the decoding of an arbitrary channel included in the test uplink signal in the signal processing unit 45 has been normally performed, and transmits the result of the confirmation to the transmission / reception device 40. Is transmitted to a higher-level device (not shown). That is, the transmitting / receiving device-side control unit 46 has a function as a confirmation unit.

The decoding of the test uplink signal in the signal processing unit 45 can be confirmed by the mobile unit-side control unit 21. Also, in the host device, it is determined whether or not the operation of the signal control function corresponding to the uplink in the transmission / reception device 40 is normal based on the result of the decoding confirmation indicated by the received confirmation signal.

The power supply line 50 is a wiring connecting the reception amplification device 30 and the transmission / reception device 40, and carries a communication signal and a test signal. When the wireless base station has a configuration in which the reception amplification device 30 is provided outside the transmission / reception device 40 and separated from the transmission / reception device 40, the length of the cable used as the power supply line 50 is 2
It is about 0 m to 100 m. The feeder line 50 is a downstream signal transmission line that carries a downstream signal, a system 0 upstream signal transmission line that is wired to the diversity branch 0 system and transfers an upstream signal, and is wired to a diversity branch 1 system and transfers an upstream signal. It has a configuration in which a 1-system upstream signal transmission line is provided.

Next, the operation of a radio base station test using the radio base station test apparatus of this embodiment will be described with reference to FIGS. First, an operation test of the upstream system will be described. As shown in FIG. 1, the coupler 10 of the radio base station test device is connected to the power supply line 50 of the radio base station, and the port 27 of the test mobile device 20 is connected to the port of the transmission / reception device 40, as shown in FIG. 48 respectively.

When the operation test is started, the transmitting / receiving device 40
A sector selection signal is transmitted from the transmitting / receiving device side control unit 46 to the mobile unit side control unit 21 of the test mobile unit 20 via the ports 48 and 27. This sector selection signal indicates that sector 1 and diversity branch 0 are selected in the operation check test. Upon receiving the sector selection signal, the mobile station-side control unit 21 selects the coupler 10 corresponding to the sector 1 indicated by the sector selection signal from a plurality of sectors, and transmits a switching control signal.

The switching control signal is transmitted to the ports 26 and 16
Is transmitted to the high-frequency relay 13b via the. By receiving the switching control signal, the branch transmission path in the high-frequency relay 13b enters a connected state. Note that the branch transmission paths in the high-frequency relays 13a and 13c are in a disconnected state because the high-frequency relays 13a and 13c do not receive the switching control signal. Here, since the switching control signal is not supplied to the coupler 10 disposed in another sector by the selection of the coupler 10 in the mobile device side control unit 21, the high frequency relay of the coupler 10 in another sector is provided. 13 does not work.

Next, the mobile station control section 21 sends the mobile station 2
2, a transmission start signal is transmitted. In the mobile device 22 that has received the transmission start signal, an uplink signal for testing (for example, 800 MHz band) is transmitted to the distributing / combining device 23. Here, the distribution / synthesizer 23 selects an attenuator 24a corresponding to the feeder line of the diversity branch 0 system of the sector 1 selected by the sector selection signal from the plurality of attenuators 24. Based on this selection, the upstream signal is transmitted from the distributor / synthesizer 23 to the attenuator 24a.

The upstream signal whose power level has been adjusted by the attenuator 24a is transmitted to the distributor / combiner 12a via the port 25a and the port 17. Note that the distribution combiner 23 and the attenuator 24a are set so that the power loss of the upstream signal when passing through them is about 20 dB.

The upstream signal arriving at the distributor / synthesizer 12a is:
Since the high-frequency relay 13a is in the disconnected state, the coupler 1
The signal is not transmitted to 1a, but is transmitted to distribution / combiner 12b.
In the divider / combiner 12b, the received upstream signal is distributed to the high frequency relays 13b and 13c and transmitted.

However, since the sector selection signal transmitted from the transmitting / receiving device-side control unit 46 to the mobile unit-side control unit 21 indicates the diversity branch 0 system, the mobile unit-side control unit 21 receives this instruction. Although the transmitted switching control signal sets the high-frequency relay 13b to the connected state, it is not transmitted to the high-frequency relay 13c, so that the disconnected state is continued. Therefore, the upstream signal is transmitted to the high-frequency relay 13
b, and is supplied to the loosely coupled terminal of the coupler 11b.

The loss from the port 17 to the coarse coupling terminal of the coupler 11b is expected to be about 10 dB in the 800 MHz band, and the coupling amount between the coarse coupling terminal and the main signal line (feeding line 50) is about -50 dB. Set it.

Subsequently, the upstream signal is transmitted from the coupler 11b to the distributor (0-system) 42a of the transmitting / receiving device 40 via the port 15b and the port 46b. Here, mobile unit 2
The power level of the upstream signal when transmitting No. 2 is -40 dB
m, the loss up to the port 15b is 80 dB, so that when the signal is supplied to the transmitting / receiving device 40, -12.
0 dBm.

In the case of the N-CDMA (IS-95) system, the transmission / reception device 40, when entering a call state like a general mobile station, transmits an FER (Frame err) of an uplink signal.
(or rate) is measured, and power control (uplink signal level control) of the uplink signal is performed so as to be 1%. Therefore, the uplink signal level is uniquely determined.

When N-CDMA is considered, the thermal noise (KTB) is -113 dBm, and the spreading gain is -21 dB.
= 10 log 3600 bps / 1.2288 MHz, 1
The ratio between the signal reception energy per bit Eb and the power spectral density No of the sum of noise and despread interference is required E
b / No = 4.3 dB, NF of the transmission / reception device 40 is 13 d
B, it is estimated that the uplink signal level (reception sensitivity point) for obtaining the FER of 1% of the transmission / reception device 40 is controlled to be around -116 dBm.

The upstream signal reaching the distributor (0-system) 42a of the transmitting / receiving device 40 is distributed to the specified distribution number (FIG. 1).
Are divided into four. The distribution loss at this time is 7 dB
About. ), And is supplied to the transmission / reception unit 44. The upstream signal is frequency-converted from the RF band to the IF band in the transmission / reception unit 44 and supplied to the signal processing unit 45, where it is despread and decoded.

The transmission / reception device-side control unit 46 confirms whether or not decoding of an arbitrary channel included in the uplink signal in the signal processing unit 45 has been normally performed. It is transmitted as a confirmation signal to the host device that does not. In the higher-level device, based on the confirmation result indicated by the received confirmation signal, the transmission / reception device 40
It is determined whether the upstream signal control function is normally operating.

The upstream signal received by the transmission / reception unit 44 is transmitted to the coupler 11c via the rough coupling terminal of the coupler 11a and the high-frequency relay 13c in the disconnected state.
(Diversity branch 1 system). However, the isolation of the high-frequency relay 13c is −60 dB, and this value is set to a level much smaller than the diversity branch 0 system specified as the test target, so that the transmission / reception device 40 receives the uplink signal erroneously. It will not be done.

Next, with respect to the downlink operation test, FIGS.
This will be described with reference to FIG. When the downlink operation test is started, the transmission / reception device-side control unit 46 sends the mobile unit-side control unit 21
, A sector selection signal is transmitted. It is assumed that this sector selection signal indicates that sector 1 is selected.
Upon receiving the sector selection signal, the mobile station-side control unit 21 selects the coupler 10 corresponding to the sector 1 indicated by the sector selection signal from a plurality of sectors, and transmits a switching control signal. When the switching control signal transmitted from the mobile device side control unit 21 is received by the high frequency relay 13a, the branch transmission path in the high frequency relay 13a is connected.

The signal processing unit 45 of the transmitting / receiving device 40, like the general mobile terminal downlink signal to be transmitted to the general mobile terminal.
The IF signal (intermediate frequency band signal) coded and spread in is supplied to the transmission / reception unit 44, where it is frequency-converted into a radio frequency band (800 MHz band) and paired with an uplink signal for TTR. Downlink signal (downlink signal for test)
Becomes The TTR downlink signal is power-amplified by the signal amplifier 41 and supplied to the port 15a of the coupler 10 via the port 47a.

The power level of the amplified downlink signal for TTR is usually about +27 dBm (0.5 W) because one communication channel is allocated, but it includes the downlink signal for general mobile stations. In the case of maximum multiplexing, it is about +44 dBm (25 W). Hereinafter, such a downlink signal is referred to as an all downlink signal.

The entire downstream signal input to the port 15a of the coupler 10 is transmitted from the coupler 11a to the port 14a with low loss, and extracts a level (-6 dBm) lowered by about -50 dB to the coarse coupling terminal. The extracted all downstream signals are transmitted to the high-frequency relay 13a, the distribution combiner 12a
To reach port 17. The power level at this time is about -10 dBm.

Thereafter, all downlink signals are transmitted to the test mobile station 20.
Through the port 25a, the attenuator 24a, and the distributor / combiner 23, the signal is further attenuated by about 20 dB to -30 dBm.
(The downlink signal for TTR becomes -47 dBm), and is supplied to the mobile device 22 to be despread and decoded. Whether or not decoding of an arbitrary channel included in all downlink signals in the mobile device 22 has been normally performed is confirmed in the mobile device side control unit 21, and the result of the confirmation is transmitted to the higher-level device via the transmission / reception device 40. Is done.

Here, the entire downstream signal (−6 dBm) extracted from the loosely coupled terminal of the coupler 11 a is
Partially leaks from a to the distributor / synthesizer 12b, and enters the main signal line (branch 0 system feed line) via the high-frequency relay 13b and the coarse coupling terminal of the coupler 11b.

The level of all downstream signals entering the main signal line is -20 when the isolation of the distributor / synthesizer 12a is -20.
Since the coupling amount of the coarse coupling terminal is about -50 dB and the coupling amount is -50 dB, the value is -76 dBm. However, since this value is a frequency outside the reception band of the transmission / reception device 40, the reception characteristic of the uplink signal is hardly affected. . Also, a downlink signal from another sector may enter the port 25b of the test mobile device 20 and cause interference with the sector 1. However, the high-frequency relay 13a of the coupler 10 of the other sector is in a disconnected state. From the level of the sector 1 (port 25a).
There is no problem because it is about 60 dB lower.

Sector 1 transmitted from test mobile station 20
It is conceivable that an upstream signal for transmission enters the coupler 10 of another sector via the port 25b and causes interference, but for the same reason as described above, there is no problem in this case. In addition, according to the operation of the wireless base station test shown in the present embodiment, the operation test can be similarly performed for other sectors. In FIG. 1, the coupling unit 10 is provided between the reception amplification device 30 and the transmission / reception device 40, but may be provided in an internal circuit of the reception amplification device 30 or an installation unit of the transmission / reception antenna 31 a and the reception-only antenna 32 a. You can also connect.

With the above configuration of the radio base station test apparatus, it is possible to perform an operation check test of the uplink and downlink systems of the sector 1 in the transmitting / receiving apparatus 40 without causing interference to the sector and other sectors. Can be. Further, since the internal configuration of the wireless base station test apparatus is simple, it is possible to reduce equipment costs.

[Second Embodiment] Next, a second embodiment of the radio base station test apparatus of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing the internal configuration of the coupler of the radio base station test apparatus of the present embodiment.

This embodiment is different from the first embodiment in that
The internal configuration of the coupler is different. That is, in the first embodiment, the splitter is provided with a splitter / combiner for distributing and synthesizing the test signal, whereas in the present embodiment, a transmission / reception splitter is provided instead of the splitter / synthesizer. I have to do that.
The internal configurations of the other wireless base stations and test mobile devices are the same as in the first embodiment. Therefore, in FIG.
The same components as those in FIG.
A detailed description thereof will be omitted.

As shown in FIG. 6, the coupler 10 of the radio base station test apparatus includes couplers 11a, 11b and 11c, a distributor / synthesizer 12b, and high-frequency relays 13a, 13b and 1c.
3c, ports 14a-14c, 15a-15c, 16
And 17 and a transmission / reception splitter (DUP) 18. Here, the transmission / reception splitter 18 corresponds to the reception amplification device 3 shown in FIG.
It has a function similar to that of the transmission / reception splitter 33 provided at 0.
That is, in addition to the function of limiting the band of the communication signal, it has a transmission / reception branching function.

The test operation of the radio base station test apparatus of this embodiment having such a configuration will be described with reference to FIG. In the test of the present embodiment, as in the test of the first embodiment, it is assumed that the sector 1 and the diversity branch 0 are selected. In the down system test, all down signals input to the port 15a of the coupler 10 are extracted as a level lower by -50 dB than the coarsely coupled terminal of the coupler 11a, and transmitted to the transmission / reception splitter 18. Since the transmission / reception branching filter 18 has a transmission / reception branching function, all downlink signals are transmitted to the port 17 with low loss.

On the other hand, the transmission / reception splitter 18
There is a down signal leaking to the high-frequency relays 13b and 13c via the line b, but this leak signal needs to be reduced as much as possible. The power level of the leaked signal in the first embodiment was about -20 dB, and the interference level sneaking into the transmitting / receiving device 40 from the port 15b was -76 dBm. However, in the present embodiment, since the isolation in the transmission / reception splitter 18 is improved to about -80 dB, the improvement amount is about 60 dB, and the interference level is attenuated to -136 dBm. Therefore, there is no problem at all.

On the other hand, in the uplink test, the uplink signal (−60) transmitted from the test mobile device 20 to the port 17 is used.
dBm) through the transmission / reception splitter 18
And 11c with low loss. In addition, the transmission / reception splitter 1
At 8, the interference level leaking toward the coupler 11a is attenuated to about -80 dB. For this reason, by using the transmission / reception branching filter 18, in the first embodiment, -4
Compared to the interference level which was about dB,
It can be improved by about dB.

By providing such a transmission / reception splitter in the coupler of the radio base station test apparatus, the interference level in the operation test of the CDMA radio base station is further improved as compared with the first embodiment. be able to.

[Third Embodiment] Next, a third embodiment of the radio base station test apparatus of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing an internal configuration of the coupler 10 of the radio base station test apparatus according to the present embodiment.

This embodiment is different from the first embodiment in that
The internal configuration of the coupler is different. That is, in the first embodiment, a high-frequency relay is provided in the coupler, whereas in the present embodiment, a variable attenuator is provided instead of the high-frequency relay. Other configurations of the test mobile device and the radio base station are the same as those of the first embodiment. Therefore, in FIG. 7, the same components as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 7, the coupler 10 of the radio base station test apparatus includes couplers 11a, 11b and 11c, distribution combiners 12a and 12b, ports 14a to 14c,
15a to 15c, 16 and 17, and a variable attenuator (VAR)
ATT) 19a, 19b and 19c.

Here, the variable attenuators 19a, 19b and 1
9c has a function of attenuating the signal level in the RF band to a specified value or making it through (minimizing loss). As the variable attenuators 19a, 19b, and 19c, two stages of commercially available MHY2014 manufactured by Toshiba Lighting & Technology Corp. are cascaded to provide about 60 dB of isolation during operation (-4 dB) and non-operation (-65 dB). Can be easily realized.

The operation of the radio base station test apparatus of this embodiment having such a configuration will be described with reference to FIG. As in the test operation in the first embodiment, the sector 1
And the diversity branch 0 system is selected. With this selection, the variable attenuators 33a and 33
3b is operated, and the loss is set to about -4 dB during the operation.

In the uplink test, the test mobile station 20
Is transmitted to the coarse coupling terminal of the coupler 11b via the port 17, the distributors / combiners 12a and 12b, and the variable attenuator 19b.
Is supplied to the transmission / reception device 40 through the transmission line. Variable attenuator 19
Since c is not operated, a level lower than the injection level of the coupler 11b by about -60 dB is injected into the coarse coupling terminal of the coupler 11c (diversity branch 1 system).

The high-frequency relays 13a to 13 of the first embodiment
Since there is no difference in the isolation characteristic from the case of c, the transmission / reception device 40 does not receive the uplink signal leaked to the diversity branch 1 system by mistake.

Even if such a variable attenuator is provided in the coupler of the radio base station test apparatus in place of the high frequency relay, interference with other sectors may occur as in the operation test of the radio base station in the first embodiment. The test can be performed without giving.

[0105]

As described above, according to the radio base station test apparatus of the present invention, a radio base station used in a mobile communication system adopting a CDMA communication system, wherein a communication between an antenna and a transmission / reception apparatus is performed. Or, by providing a coupler in the feeder line connecting between the reception amplification device and the transmission and reception device, together with the test mobile device, by performing an operation confirmation test of the radio base station, in the RF frequency band that could not be prevented conventionally The operation check test of the wireless base station can be performed while suppressing the interference. For this reason, the operation test of the wireless base station can be performed without deteriorating the communication quality during operation.

In addition, with the prevention of interference in the RF frequency band, it is possible to suppress the interference that cannot be completely eliminated by the conventional countermeasures in the baseband frequency band after frequency conversion. Further, by making the wireless base station test apparatus a simple circuit configuration using a coupler, a high-frequency relay, and the like, the cost of the wireless base station test apparatus can be reduced.

A high-frequency relay having a high isolation characteristic is provided for each path of the power supply line, and only the necessary relays are operated to switch the distribution of the test signal. By setting the diamond, it is possible to prevent interference with the sector and other sectors even during the test by the test mobile device, and to prevent the deterioration of the communication quality of the general mobile device during the call. . Further, if a transmission / reception splitter is provided instead of the splitter / combiner of the coupler, the interference level in the operation test of the radio base station can be further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a connection configuration of a wireless base station test apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a coupler in the wireless base station test device of the first embodiment.

FIG. 3 is a block diagram illustrating an internal configuration of a test mobile device in the wireless base station test apparatus according to the first embodiment.

FIG. 4 is a block diagram illustrating an internal configuration of a reception amplification device of a wireless base station.

FIG. 5 is a block diagram illustrating an internal configuration of a transmission / reception device of the wireless base station.

FIG. 6 is a block diagram illustrating an internal configuration of a coupler in a wireless base station test apparatus according to a second embodiment of the present invention.

FIG. 7 is a block diagram illustrating an internal configuration of a coupler in a wireless base station test apparatus according to a third embodiment of the present invention.

FIG. 8 is a block diagram showing a connection configuration of an operation test of a radio base station using a conventional test mobile device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 coupler 11 coupler (CPL) 12 distributor / synthesizer (H) 13 high-frequency relay 14 port (tower-type outdoor receiver / amplifier side) 15 port (transmitter / receiver side) 16 port (test mobile unit side) 17 port (test) 18) Transmitter / receiver duplexer (DUP) 19 Variable attenuator (VAR ATT) 20 Test mobile station (TTR) 21 Mobile station side control unit (CONT) 22 Mobile station (MS) 23 Distribution combiner (H) ) 24 attenuator (ATT) 25 port (coupler side) 26 port (coupler side) 27 port (transmitter / receiver side) 30 receive amplifier (TOP AMP) 31 transmit / receive antenna 32 receive-only antenna 33 transmit / receive duplexer ( DUP) 34 Band-pass filter (BPF) 35 Receive amplifier (0 system) 36 Receive amplifier (1 system) 37 Port 40 Transmitter / receiver (TRE) DESCRIPTION OF SYMBOLS 1 Transmission amplification part (TPA) 42 Distributor (0 system) (1 / N) 43 Distributor (1 system) (1 / N) 44 Transmission / reception part (TRX) 45 Signal processing part (CH) 46 Transmission / reception apparatus side control part (CONT) 47 port (coupler side) 48 port (test mobile device side) 50 power supply line 60 test signal transmission line 100 reception amplifier (TOP AMP) 110 transmission / reception antenna 120 reception-only antenna 130 transmission / reception duplexer (DUP) ) 140 Bandpass filter (BPF) 150 Receive amplifier (0 system) 160 Receive amplifier (1 system) 200 Transmitter / receiver (TRE) 210 Transmit amplifier (TPA) 220 Distributor (0 system) (1 / N) 230 Distributor (1 system) (1 / N) 240 Transmission / reception unit (TRX) 250 Signal processing unit (CH) 260 Transmission / reception device side control unit (CONT) 300 Test movement (TTR) 310 mobile station side control unit (CONT) 320 mobile station (MS) 330 distributing synthesizer (H) 340 attenuator (ATT) antenna 360 port for 350 TTR (coupler side) 370 port (transceiver side)

Continued on the front page F term (reference) 5K022 EE01 EE21 EE31 5K042 AA06 CA13 DA11 EA09 FA21 GA02 JA01 LA11 MA04 MA08 5K067 AA03 AA21 AA41 CC10 DD11 EE02 EE10 EE46 GG01 GG11 HH22 KK01 LL08

Claims (7)

[Claims] An antenna unit for transmitting and receiving a communication signal, a transmission line for carrying the communication signal transmitted and received by the antenna unit, a frequency conversion unit for performing frequency conversion of a communication signal carried by the transmission line, and a downlink. And a transmitting / receiving apparatus having a communication signal transmitting unit for transmitting the communication signal to the frequency conversion unit and performing an operation confirmation test on the CDMA wireless base station. A test signal transmitting unit that transmits a test signal transmitted from the test signal transmitting unit; a coupling unit that couples the test signal transmitting line with the transmission line; The test signal transmitted and carried by the transmission line via the coupling unit, and / or transmitted from the communication signal transmitting unit via the coupling unit and A decoding unit that receives the downlink communication signal carried by a test signal transmission path and decodes the test signal and any channel included in the downlink communication signal; and the test signal in the decoding unit. A radio base station test apparatus comprising: a confirmation unit configured to confirm whether decoding of an arbitrary channel included in the downlink communication signal has been normally performed. 2. The radio communication system according to claim 2, wherein the CDMA radio base station is provided on the transmission line with a reception amplification device for amplifying the communication signal received by the antenna unit, and wherein the coupling unit includes the reception amplification device and the transmission / reception unit. 2. The radio base station test apparatus according to claim 1, wherein the transmission line between the apparatuses and the test signal transmission path are coupled. 3. The CDMA radio base station is provided with a plurality of the transmission lines, the test signal transmission line is provided with a plurality of branch transmission lines connected to the plurality of transmission lines, respectively, Each of the transmission paths is provided with a relay unit for connecting and disconnecting the branch transmission path, and the radio base station test apparatus includes: a decoding unit of the radio base station test apparatus; A relay control unit for controlling the plurality of relay units is provided so that the test signal or the communication signal passing over a transmission line selected as an operation check test target is received. Item 1 or 2
The radio base station test apparatus according to the above. 4. The communication unit according to claim 1, wherein the antenna unit includes a transmission / reception antenna for transmitting / receiving the communication signal, and a reception-only antenna for receiving only the communication signal, and the transmission line transmits from the communication signal transmission unit. A downlink signal transmission line that carries the downlink communication signal to the transmission / reception antenna, a system 0 uplink signal transmission line that carries a communication signal received by the transmission / reception antenna to the transmission / reception device, and the reception-only antenna And a 1-system upstream signal transmission line that conveys the communication signal received in the transmission / reception device to the transmission / reception device, wherein the plurality of branch transmission paths are first, second, and third branched from the test signal transmission path. A first branching unit having a branch transmission path, wherein the test signal transmission path branches the first branch transmission path from the test signal transmission path; A second branch unit that branches to the third branch transmission path, wherein the plurality of relay units perform connection and disconnection of the first branch transmission path; and A second relay unit that performs connection and disconnection of the branch transmission path; and a third relay unit that performs connection and disconnection of the third branch transmission path. A first coupling section that couples a transmission path with the downlink signal transmission line; a second coupling section that couples the second branch transmission path with the 0-system uplink signal transmission line; and the third branch transmission path And a third coupling unit that couples the 1-system upstream signal transmission line with the third-system upstream signal transmission line. The first relay unit, the second relay unit, and the third relay unit connected to a transmission line to be subjected to an operation check test. The radio base station test apparatus as claimed in claim 3, wherein the controller controls the operations of connection and disconnection of the conductive portion. 5. The radio base station test apparatus according to claim 4, wherein the first relay unit, the second relay unit, and the third relay unit are configured by high-frequency relays. 6. The radio base station test apparatus according to claim 4, wherein the first relay unit, the second relay unit, and the third relay unit are configured by a variable attenuator. 7. The radio base station test apparatus according to claim 4, wherein said first branching unit comprises a transmission / reception splitter.