JPH06291739A - Radio base station testing device - Google Patents

Abstract

PURPOSE:To easily measure the characteristics of a transmitter and a receiver just by outputting a test instruction by minimizing manual control. CONSTITUTION:The test instruction is outputted from a control part 13, the above-mentioned test instruction is converted to a control instruction used in a control communication line 12 by a protocol analyzer 1 and a signal converter 2, the transmitter or the receiver specified by the test instruction is controlled by an equipment control part 20 and a prescribed operation is executed. Also, a pertinent measuring device within a frequency counter 4, a power meter 5 and signal generators 7-8, etc., is operated, a switching device 3 is switched corresponding to the above-mentioned test instruction outputted from the control part 13 further, and general characteristics for an arbitrary one of the transmitters 21A-21N or one of the receivers 22A-22N are measured. A measured result is received through equipment control lines 23-24 by the control part 13, outputted to a display part 14 and displayed.

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 device, and more particularly to a radio base station test used to test the comprehensive characteristics of a transmitter and a receiver of a radio base station that performs communication using digital signals. Regarding the device.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing an example of a conventional radio base station test apparatus of this type.

As shown in FIG. 3, a conventional radio base station test device for communicating digital signals includes a spectrum analyzer 6A for measuring the spectrum of a transmission wave from the transmission devices 21A to 21N of the radio base station, as shown in FIG. Frequency counter 4A and power meter 5 for measuring the transmission frequency and the transmission power of the transmission devices 21A to 21N, respectively.
It has A and.

Further, signal generators 7A and 8A which output signals of a designated frequency, and a modulator 9A which code-modulates the output of the signal generator 7A in a predetermined modulation format,
A coupler 10 for combining and outputting the outputs of the modulator 9A and the signal generator 8A, and a transmitter 21 included in the base station 17.
A-21N and receivers 22A to 22N are connected to the device to be measured each time, and output via the control command generation unit 15 that outputs a control command and the control communication line 12 that the base station 17 has. The demodulation signal is input, and the error rate measuring device 11 that measures the error rate of the demodulation signal in synchronization with the synchronization signal output from the modulator 9A and outputs the result is provided.

The base station 17 includes a plurality of transmitters 21A-2A.
1N and receivers 22A to 22N, which are usually controlled by a communication control unit (not shown) via a control communication line 12, and some of the transmitters and receivers described above operate. Then, desired digital communication is performed.

At this time, the transmission antenna 18 is connected to the terminal S2 and the output terminal S1 obtained by combining the transmission devices 21A to 21N by a coaxial cable or other line as shown in FIG. Devices 22A-2
Similarly, the input side of 2N is connected by a line such as a coaxial cable.

Now, the comprehensive electric characteristic test of the transmitters 21A to 21N and the receivers 22A to 22N is performed as follows.

First, in the case where a comprehensive test is performed on the transmitting device, the transmitting antenna 18 of the base station and the transmitting devices 21A to 21A.
21N is disconnected, and frequency counter 4A or power meter 5A and spectrum analyzer 6A
Any one of them is connected.

In this state, the control command generator 15 is connected to any one of the transmitters 21A to 21N, and a predetermined test command is input.

The control command generating section 15 is composed of a keyboard for inputting a test command and a central processing unit for interpreting the command input from the keyboard and outputting a command for controlling a predetermined transmitting device.

The control command generator 15 manually connects the output side to a desired transmitter (one of 21A to 21N), and uses a control signal for a test according to the input as a control command 16. Add to a specific transmitter.

The transmitting device to which such a control command is added is in an operating state and outputs a signal having a predetermined frequency.

At this time, if the frequency counter 4A is connected to the output terminal S1 of the transmitter as described above, the output frequency can be measured. If the power meter 5A is connected, the output power of the spectrum can be measured. By connecting the analyzer 6A, the magnitude and distribution of the frequency component of the signal output can be measured.

When measuring the overall characteristics of the receivers 22A to 22N, the connection between the terminal S4 of the receiving antenna 19 and the input terminal S3 of the receivers 22A to 22N is released, and the output of the coupler 10 and the input terminal S3 are disconnected. Is connected, the signal generator 7A is operated to output a desired frequency, and the modulator 9A is operated to perform modulation of a method used for communication in the base station 17 in advance (for example, π / 4DQPSK method). Output to the coupler 10.

Here, if it is desired to measure the influence of an interfering wave of a certain frequency, the signal generator 8A is also operated to output the same frequency as the interfering wave to be measured. At this time, the output of the control command generation unit 15 is connected to a receiving device (one of 22A to 22N) which is to be measured, and the relevant test command is output from the control command generation unit 15, and the predetermined receiving device outputs the test command. Controls demodulated signal Line 1 for communication
2 to output. The demodulated signal output to the control communication line 12 is measured by the error rate measuring device 11 to obtain the overall characteristic of the receiving device.

[0016]

When the above-mentioned conventional radio base station test apparatus is used to test the overall characteristics of the above-mentioned transmitter or receiver, the transmitter 21A is used.
21N and the frequency counter 4, the power meter 5 and the spectrum analyzer 6A are manually connected by the measurer whenever necessary, and similarly the receiver 22A of the coupler 10 is connected. It is necessary to manually connect to ~ 22N, and also for the measurement result, the observer changes the test item because it is necessary for the measurer to visually read the display of each measuring instrument. Each time, it is necessary to move to the vicinity of the target measuring device, which is a troublesome task.

In addition, each time the test is performed, the control command generation unit 15 is connected to the transmitter or the receiver to be tested,
It is necessary to add a control signal for the test (for example, a control to activate a transmission device corresponding to a desired one of a plurality of transmission channels and start transmission at a desired frequency). It has a drawback that the control is extremely complicated.

An object of the present invention is that when a specific test command is output, control of a measuring instrument corresponding to the command and connection between necessary devices can be easily executed with almost no manual operation, and It is an object of the present invention to provide a radio base station test device capable of controlling by adding the above-mentioned test command to a transmitting device or a receiving device corresponding to a desired channel via a control communication line of the base station.

[0019]

A radio base station test apparatus of the present invention receives a test result in a radio base station test apparatus that tests the characteristics of a transmitter and a receiver of a radio base station that transmits and receives digital signals. Then, a display unit that displays the result, a control unit that outputs a test command that specifies the selected desired test item and outputs the test result to the display unit when the test result is received, the test command and this test A command database that stores a series of time-sequentially determined command signals corresponding to an instruction in association with each other and stores an acquisition signal indicating a test result and a test result corresponding to this acquisition signal in association with each other. , Referring to the command base, when the test command is received, the corresponding series of commands are output in the specified order, and when the acquisition signal is received, the corresponding test result is output. When receiving the protocol analyzer and the command signal output by the protocol analyzer, it is converted to a control command used in the control communication line and output to the control communication line, and the control communication line acquisition signal is received from the control communication line. A signal converter that converts the acquired signal to output to the protocol analyzer, and when the control command is received via the communication control line, the transmitter or the receiver of the corresponding channel designated according to the content of the command A device control unit for selecting and controlling at least one and converting an output from the selected receiving device into a signal defined by the control communication line and outputting the signal as the acquisition signal to the control communication line, and an input side Is connected to the output end of the transmitter at the time of measurement, and the measurement unit receives the measurement command from the controller. A switching device that switches the output from the communication device to any one of the first to third output terminals and outputs the output signal, and counts the input frequency using the first output of the switching device as an input to the control unit. A frequency counter for outputting, a power meter for measuring output power by inputting the second output of the switching unit and outputting the result to the control unit, and a spectrum of the output frequency for inputting the third output of the switching unit. A spectrum analyzer that outputs a distribution, a first signal generator that generates and outputs a signal of a specified frequency when the test instruction output from the control unit is a corresponding test instruction, and the first signal generator Different from the first signal generator when a test command output from the control unit is a corresponding test command, and a modulator that performs code modulation of a predetermined format on the output signal of the device and outputs. Lap A second signal generator that generates and outputs a wave number signal, a coupler that combines the modulator and the output of the second signal generator, and outputs the combined signal to a connection terminal on the input side of the receiving device; When the output from the coupler is input to the receiving device in synchronization with the modulation signal of the receiver, the signal demodulated by the receiving device is received via the control communication line, the error rate is measured, and the result is controlled by the control. And an error rate measuring device for outputting to the unit.

[0020]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the radio base station test apparatus of the present invention.

The measurement target of the radio base station test apparatus of the present invention is the transmitters 21A to 21A corresponding to the plurality of channels constituting the base station 17 shown in FIG.
21N and receivers 22A to 22N. Base station 1
7 is provided with a transmitting antenna 18 and a receiving antenna 19 in addition to the transmitting device and the receiving device, and the terminal S2 of the transmitting antenna 18 has a transmitting device 21A at the terminal S2 during normal operation.
The terminal S0, which is a composite output of ~ 21N, is directly connected,
The terminals S4 of the receiving antenna 19 are connected to the receiving devices 22A to 22A.
The terminal S3 on the N input side is connected.

As shown in FIG. 1, the radio base station test apparatus according to the present embodiment outputs a desired test command, and when the measurement result is received, the control unit 13 sends the measurement result to a display unit 14 which will be described later. And a command database in which a display unit 14 that displays on the screen when the measurement result is received from the control unit 13 and a series of control commands corresponding to the respective test commands to be output from the control unit 13 are stored in advance. Storage unit 2
3 and the test command output by the control unit 13 are received, the contents of the command database storage unit 23 are referred to and the corresponding series of control commands are sequentially read and output in time series.
The protocol analyzer 1 that outputs the acquired signal output from the signal converter 2 to the control unit 13 as measurement data, and the control instruction in the format used by the control communication line 12 included in the base station 17 for the control instruction output from the protocol analyzer 1 21A to 21A to 21A to 21C which are output to the control communication line 12 via the device control unit 20 described later.
21N or the receiving devices 22A to 22N is provided with a signal conversion unit 2 that converts a measurement result signal into an acquisition signal used by a protocol analyzer and outputs the acquired signal.

The above-mentioned radio base station test apparatus also has a switch 3 whose input side is connected to the terminal S1 on the transmission side and which is controlled by the control unit 13 to switch the output side to one of the three output positions. , A frequency counter 4 individually connected to each of the three output positions of the switch 3, and a power meter 5
And a spectrum analyzer 6. The frequency counter 4, the power meter 5, and the spectrum analyzer 6 are all controlled by a test command output from the control unit 13 connected via the device control line 24, and output the measurement result to the control unit 13.

Further, this radio base station test apparatus is controlled by the signal generators 7 and 8 which are connected and controlled via the equipment control line 23 by the test command of the control unit 13 and the test command of the control unit 13. A modulator 9 that modulates the output of the signal generator 7 by a predetermined code modulation method and outputs the result, and the output of the modulator 9 and the output of the signal generator 8 are combined to form a terminal S5.
And a coupler 10 for outputting to.

In addition, the above-mentioned radio base station test device is
According to the control command output from the signal converter 2 via the control communication line 12, the transmitter 21A in the base station 17
˜21N and receiving devices 22A to 22N, a device control unit for controlling a specified device and outputting the output of the test result from the transmitting device or the receiving device specified by the test control command to the signal converter 2. 20 and a demodulation signal of the receiving device output to the control communication line 12 in synchronization with a synchronization signal output separately from the modulation signal from the modulator 9, the error rate is measured, and the result is measured by the control unit. And an error rate measuring device 11 for outputting to 13.

Here, when it is desired to measure the overall characteristics of any one of the receiving devices 22A to 22N, first, the terminal of the receiving antenna 19 and the input side terminal S3 of the receiving device are disconnected, The terminal S5 connected to the coupler 10 and the input terminal S3 of the receiving device are manually connected, a predetermined test command is input from a keyboard (not shown) of the control unit 13, and the control unit 13 A similar test command is applied to the signal generators 7 and 8 and the modulator 9 via the equipment control line 23, and a similar test command is given to the equipment control line 24.
The error rate measuring device 11 and the protocol analyzer 1 are added via.

With this test command, for example, the desired receiving device 22A is specified, and the specific reception frequency and the frequency of the interference wave to be measured are specified.

Upon receiving this test command, the protocol analyzer 1 refers to the contents of the command database storage unit 23 and outputs a control command corresponding to the input test command to the read signal converter 2.

When there are a plurality of necessary control commands in response to the test command, a plurality of control commands are transmitted from the protocol analyzer 1 in a time series in the order stored in advance in the command database storage unit 23. Is output.

The signal converter 2 converts the received control command into a control command of a predetermined format and outputs it to the device control section 20 via the control communication line 12.

The device control section 20 controls the receiving device 22A by the input control command to put it in the receiving state. At the same time, the test command output from the above-mentioned control unit 13 is received by the signal generators 7 and 8 and the modulator 9, and the signal generators 7 and 8 respectively output the signals of the frequency specified by the test command. The modulator 9 performs code modulation on the output of the signal generator 7 in a predetermined modulation format, and a coupler 10
And the synchronization signal to the error rate measuring device 11.

In this way, the signal output from the signal generator 7 is code-modulated by the modulator 9, and together with the interfering wave output from the signal generator 8 by the coupler 10, passes through the terminals S5 to S3 and the receiving devices 22A to 22N. Is output to.

The receiving device 22A is controlled by the control signal output from the device control section 20 to be in an operating state, and outputs the demodulated signal as an acquisition signal to the control communication line 12 via the device control section 20. The error rate measuring device 11 receives the demodulated signal as an input, measures the error rate, and outputs the result to the control unit 13 via the device control line 24.

The control unit 13 receives the measurement result from the error rate measuring device 11 via the device control line 24, and outputs the result on the display unit 14 for display.

On the other hand, when it is desired to test the characteristics of one of the transmitters 21A to 21N, first, the output terminal S0 of the transmitter and the terminal S1 connected to the switch 3 are first tested.
And are connected manually. Then, the corresponding test command is output from the control unit 13 and added to the protocol analyzer 1 and the switch 3 via the device control lines 23 and 24.

According to the above-mentioned test instruction, the transmitting device 21
If the test of N is performed, the transmitter 21N is designated by the test command output from the control unit 13.

The protocol analyzer 1 includes a transmitter 21.
A command database storage unit 23 stores a control command for operating the transmitter 21N among the A to 21N according to a designated test command.
Is read out and output to the device control section 20 via the control communication line 12.

The device control section 20 uses the designated transmitting device 21.
When the N is turned on, the transmitter 21N is controlled to output a signal having the output and frequency specified by this command.

When the test command output from the control unit 13 is a command for measuring the frequency of the transmitter, the control unit 1
The frequency counter 4 starts operating according to the test command from the transmitter 3, and the transmitter 2 connected to the input terminal S1.
The output of 1N is output to the frequency counter 4 by the switch 3.

The frequency counter 4 counts the frequency of the input signal and outputs the result to the control unit 13 via the equipment control line 23.

When the control unit 13 receives the measurement result of the frequency counter 4 as described above, the control unit 13 outputs it to the display unit 14 for display.

If it is desired to test the transmission power of the transmission device 21N, the control unit 13 may output a test signal specifying the transmission device 21N and measurement of the output power from the control unit 13.

At this time, the output of the switch 3 is connected to the power meter side, the output power measured by the power meter 5 is output to the device control line 23 and input to the control unit 13, and the measurement result is displayed on the display unit 14. Is displayed.

Further, when it is desired to measure the spectrum distribution of the transmission output of the transmitter 21N and test whether the spurious is less than or equal to a specified value, a corresponding test command is output from the controller 13 and the output of the switch 3 is output. Is output to the spectrum analyzer 6 and the measurement result is output from the spectrum analyzer 6 to the control unit 13 via the device control line 23.

In the above description, the receiving device to be tested is the receiving device 22A of the base station 17, and the transmitting device to be tested is 21N. It may be any receiving device or transmitting device of the base station 17 other than the above, and the control unit 13 may output a test command designating these devices.

FIG. 2 is a block diagram showing another embodiment of the radio base station monitoring apparatus of the present invention. 2, instead of the terminal S0 in FIG. 1, the transmitters 21A to 21N are provided.
Output side, the terminal S2 of the transmitting antenna 18 and the measuring terminal S1
A switch SW1 for switching and connecting any one of them is provided, and one of the terminals S4 connected to the input side of the reception devices 22A to 22N and the terminal S4 of the reception antenna 19 or the coupler 10 is provided. Switch SW connected
Two are provided.

When the base station 17 performs normal operation,
The switch SW1 connects the terminal S2 of the transmission antenna 18 and the output side of the transmission devices 22A to 22N, and the switch SW2
Is the terminal S4 of the receiving antenna 19 and the receiving devices 22A to 22A.
It is connected to the input side of N.

When the control unit 13 outputs a test command for testing any one of the receiving devices 22A to 22N, the device control unit 20A receives a control signal corresponding to this command from the control communication line 12, and FIG. The device control unit 20 described in
Similarly to the above, the corresponding transmitter is controlled and the switch SW2 is controlled to connect the terminal S5 to the coupler 10.
And the input sides of the receiving devices 22A to 22N are connected.

From the control unit 13, the transmitters 21A ...
When a test command to test one of 21N is output,
When the device control unit 20A receives a control command corresponding to this command via the control communication line 12, the device control unit 20A has already received the command shown in FIG.
In the same way as the device control unit 20 described in 1., the corresponding transmitter is controlled and the switch SW1 is controlled,
The terminal S1 connected to the input side of the switch 3 is connected to the output sides of the transmitters 21A to 21N.

The other configurations and operations are the same as those of the radio base station test apparatus described with reference to FIG.

[0052]

As described above, the radio base station test apparatus of the present invention outputs a test command designating the transmitter or the receiver of the base station 17 from the control unit, so that the transmitter or the receiver. It is possible to carry out a test of the comprehensive characteristics of the display unit 14 and display the result on the display unit 14, and like the conventional test apparatus of this type, a measuring instrument corresponding to the test item (for example, a frequency counter or a power meter).
Can be continuously measured without the need to manually connect each of them, and the measurement results of each measuring device can be displayed in one place, and are subject to such tests. There is an effect that it is not necessary to individually control the transmitter or the receiver, and the overall characteristics of the transmitter or the receiver as described above can be easily and easily tested.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a radio base station test apparatus of the present invention.

FIG. 2 is a block diagram showing another embodiment of the present invention.

FIG. 3 is a block diagram showing an example of a conventional radio base station test apparatus of this type.

[Explanation of symbols]

 1 Protocol Analyzer 2 Signal Converter 3 Switching Device 4 Frequency Counter 5 Power Meter 6 Spectrum Analyzer 7 Signal Generator 8 Signal Generator 9 Modulator 10 Coupler 11 Error Rate Measuring Device 13 Control Section 14 Display Section 17 Base Station 18 Transmit Antenna 19 Reception antenna 20 Equipment control unit 21A to 21N Transmission device 22A to 22N Reception device 23 Command database storage unit SW1 switch SW2 switch

Claims (2)

[Claims] 1. A radio base station test apparatus for testing the characteristics of a transmitter and a receiver of a radio base station for transmitting and receiving digital signals, and a display section for displaying a test result when the test result is received, and a selected desired signal. , A control unit that outputs a test command that specifies a test item and outputs the test result to the display unit when the test result is received, the test command, and a series of time-series commands corresponding to the test command. Corresponds when the test command is received by referring to the command base and a command database that stores the signal in association with each other and stores the acquired signal indicating the test result and the test result corresponding to this acquired signal in association with each other. And a protocol analyzer that outputs a corresponding test result when the acquisition signal is received and a series of commands are output in a specified order. When the command signal output by the Nalizer is received, it is converted into a control command to be used in the control communication line and output to the control communication line, and when the control communication line acquisition signal is received from the control communication line, it is converted into the corresponding acquisition signal Upon receiving the control command via the communication control line and the signal converter to output to the protocol analyzer, select at least one of the transmitter or the receiver of the corresponding channel designated according to the content of the command. A device control section that controls and outputs the selected output device to the control communication line as a signal determined by the control communication line and outputs the acquired signal to the control communication line; and an output end of the transmitter. To output terminals from the transmitter according to a measurement command from the control unit, which are connected during measurement. A switching device for switching to any one of them, a frequency counter for counting the input frequency using the first output of the switching device as an input, and outputting it to the control unit, and a second output of the switching device A power meter that measures the output power and outputs the result to the control unit, a spectrum analyzer that inputs the third output of the switching unit and outputs the spectrum distribution of the output frequency, and a test output from the control unit. A first signal generator for generating and outputting a signal of a specified frequency when the instruction is a corresponding test instruction, and a code modulation of a predetermined type for the output signal of the first signal generator. A modulator for performing and outputting, and a second signal generator for generating and outputting a signal having a frequency different from that of the first signal generator when the test instruction output from the controller is a corresponding test instruction. A coupler that combines the modulator and the output of the second signal generator and outputs the combined output to a connection terminal on the input side of the receiving device; and an output from the coupler that is synchronized with the modulation signal of the modulator An error rate measuring device for receiving the signal demodulated by the receiving device via the control communication line when the signal is input to the device, measuring the error rate, and outputting the result to the control unit. Radio base station test equipment. 2. The radio base station test apparatus according to claim 1, wherein a test instruction for the transmitter is inserted between an output of the transmitter of the base station and the transmitting antenna, according to a control signal from the device control unit. Is output from the control unit, the output of the transmission device is connected to the switch, otherwise the first switch for connecting the output of the transmission device to the transmission antenna, and the input side of the receiving device. When the first and second signal generators are operated by the control command from the equipment control unit and interposed between the receiving antennas, the output from the coupler is input to the input side of the receiving device. And a second switch that connects the output of the receiving antenna to the receiving device at all other times, and the device control unit is related to the test output from the signal converter. Controls the corresponding transmitter or receiver according to the command and normally switches the output of the transmitter only when the output of the transmitter is connected to the transmission antenna and a test command related to transmission is received from the signal converter. Output a control signal for connection to a receiver and normally connect the input side of the receiving device to the receiving antenna, and when the test command of the receiving device is received via the signal converter, the output from the coupler is output from the receiving device. A radio base station test apparatus which outputs a control command for connecting to the second switch to the second switch.