JP2912327B1 - Mobile communication network communication path test method - Google Patents

Abstract

An object of the present invention is to improve the reliability of a test by eliminating an erroneous determination due to a short circuit or the like in the middle of determining whether a wired communication path and a wireless communication path are normal or abnormal. A mobile terminal includes a radio base station, a mobile communication switch, a communication network, and a test apparatus. The mobile terminal 11 delays and returns the audio test signal in the incoming call. Test apparatus 1 connected to communication network 14
6 transmits an audio test signal to the mobile terminal 11 through the mobile communication exchange 13 and the wired communication path and the wireless communication path, and transmits a return audio test signal from the mobile terminal 11 to the audio transmitted from the test apparatus 16 to the mobile terminal 11. The normal or abnormal state of the wired communication path and the wireless communication path is determined by comparing with a test signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication network communication path for performing a test for judging whether a wired communication path and a wireless communication path are normal or abnormal in a simple portable telephone network (PHS) and a cellular mobile communication system (PDC). Test method .

[0002]

2. Description of the Related Art Conventionally, in a mobile communication system such as a simple portable telephone network (PHS) and a cellular mobile communication system (PDC), a test is performed to determine whether a wired communication path and a wireless communication path are normal or abnormal. In such a mobile communication system, a large number of cell base stations (radio base stations) are connected to a mobile communication exchange, and the mobile communication exchange is connected to a wired communication network such as a public telephone network (PSTN). ing. A service area of each of a number of cell base stations is adjacent to each other, and a mobile phone, a mobile phone, and a mobile wireless data terminal move in this service area.

[0003] The radio circuit connection between a mobile terminal and a cell base station (switch for mobile communication) is based on the digital mobile telephone system standard (RCRS).
TD-27B), and the like.
The simple portable telephone network (PHS) is performed in a transmission sequence such as the second generation cordless telephone system standard (RCR STD-28). As a conventional example for performing a test for determining the normal or abnormal state of a wired communication path and a wireless communication path in such a mobile communication system, Japanese Patent Application Laid-Open No. 1-297919 “Test apparatus for wireless base station” is well known.

FIG. 10 is a block diagram showing the configuration of such a conventional mobile communication channel test system. The mobile communication channel test system accommodates a plurality of radio base stations and a mobile radio switching center test apparatus 1 for performing a test for determining whether a wire communication path and a radio communication path are normal or abnormal, and performs switching processing. It has a mobile radio switching center 2 and a radio base station 3 for making a radio line connection with a mobile terminal.

Further, the mobile communication channel test system is connected to a mobile radio switching center test apparatus 1 to control a radio base station which controls a test for judging whether a wire communication path and a radio communication path are normal or abnormal. A mobile terminal 5 for performing a wireless line connection in the service area of the wireless base station 3 with the device 4
And a wireless base station external test apparatus 6 connected to the wireless base station control device 4 and the mobile terminal 5 and provided with a switch SW for turning a reception signal back as a transmission signal.

Next, the operation of this conventional example will be described. An instruction to perform a test for determining whether the wired communication path and the wireless communication path are normal or abnormal is issued from the mobile radio exchange test apparatus 1 to the mobile radio exchange 2.
Is transmitted to the radio base station controller 4 through The radio base station control device 4 issues a call instruction to the mobile terminal 5 through the radio base station external test device 6. The mobile terminal 5 is connected to the wireless base station 3 by a wireless line according to the call instruction. That is,
The normal connection operation is performed between the mobile terminal 5 and the radio base station 3 (mobile radio exchange 2) via a radio line.

[0007] Thereafter, the switch SW of the radio base station external test device 6 is switched according to an instruction from the radio base station control device 4. This switching forms a return loop. That is, the reception signal to the speaker of the mobile terminal 5 is returned as the transmission signal from the microphone. Thereafter, a predetermined tone signal (audio test signal) is wirelessly transmitted from the mobile radio switching center test apparatus 1 to the mobile terminal 5 through the radio base station 3.

[0008] The mobile terminal 5 returns the received tone signal of the received tone signal as a transmission signal through the switch SW of the radio base station external test apparatus 6 and transmits the signal to the radio base station 3. A tone signal is returned from the radio base station 3 to the mobile radio switching center test apparatus 1 through the mobile radio switching station 2. The normal or abnormal state of the wired communication path and the wireless communication path can be determined based on the quality of reception of the returned tone signal.

[0009]

However, in the conventional mobile communication network communication path test system, when the tone signal is turned back due to a short circuit in the middle of the wired communication path and the wireless communication path, the wired communication path and the wireless communication path are not tested. Was judged to be normal, and the reliability of the test was reduced. In addition, digital car phone systems (RC
In RSTD-27B), from the transmission frequency band characteristics,
In some cases, it is difficult to transmit the tone signal satisfactorily, and the frequency band of the returned tone signal changes so narrowly that it is difficult to make a distinction at the time of listening, and it is difficult to perform a test easily.

[0010] The present invention solves the above problem of the conventional communication path test system in the prior art. A mobile terminal that receives an audio test signal transmitted through a communication network, a mobile communication switchboard, and a radio base station has a delay. The return audio test signal and the transmitted audio test signal can be used to determine whether the wired communication path and the wireless communication path are normal or abnormal, and the mobile terminal can make a determination based on the delayed audio test signal return. Therefore, it is an object of the present invention to provide a mobile communication network communication path test method that eliminates erroneous determination due to a short circuit or the like in an intermediate path and improves the reliability of the test.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, a method for testing a communication channel of a mobile communication network according to the present invention comprises connecting a mobile terminal , a communication exchange, and a communication network to each other. wireless
In a mobile communication network having a communication path及 beauty wired communication path, and wherein the mobile terminal sends back delays the audio test signal in the incoming call from the wireless communication path, said test being connected to the communication network device is the communication switching unit said audio test signal transmitted to the mobile terminal through a wired communication channel and the wireless communication path, the return audio test signal from the mobile terminal, the radio communications channel and compared with the audio test signal transmitted from the device A method for testing a communication path on a mobile communication network, which determines whether a wired communication path is normal or abnormal, comprising: a delay time of a return audio test signal in the test apparatus, a delay time in the mobile terminal, and a wired communication path and a wireless communication path. in it it is constituted that the time obtained by adding a delay time occurring.

[0012] mobile communication network speech path test method of the present invention, prior to
In order to determine whether the wired communication path and the wireless communication path of the test device are normal or abnormal, two waveforms of an audio test signal returned from the mobile terminal and an audio test signal delayed by the test device are displayed on a screen, and are displayed on a time axis . When two waveforms match
The wired and wireless communication paths are determined to be normal and
When it is determined to be abnormal.

[0013] mobile communication network speech path test method of the present invention, prior to
To determine whether the wired communication path and the wireless communication path of the test apparatus are normal or abnormal, a beat sound is generated by synthesizing the audio test signal returned from the mobile terminal and the audio test signal delayed by the delay circuit of the test apparatus. The beat sound is silent
When the wired communication path and the wireless communication path are determined to be normal,
There is a configuration in which it is sometimes determined that an abnormality has occurred.

[0014] Consequently, according to the present invention, for example, from the transmission frequency band characteristic, such as digital car telephone system, even if the tone signal is hard to listen well, the priority channel and the wireless communication path is normal or An abnormality can be easily determined.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a system for carrying out a method for testing a communication channel of a mobile communication network according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration in this embodiment. This mobile communication network channel test method
A system for implementing the method includes a mobile terminal 11 connected to a wireless base station 12 via a wireless line, a wireless base station 12 connected to the mobile terminal 11 via a wireless line, and a number of wireless base stations 1.
A mobile communication exchange 13 that accommodates the mobile communication exchange 13 and a communication network 14 such as a public telephone network (PSTN) that accommodates the mobile communication exchange 13;
A test for determining the normal or abnormal of the wired line and the wireless communication path between the wireless terminal and the wireless base station 12, the mobile communication exchange 13 and the communication network 14 between the mobile terminal 11 and the wireless base station 12 is performed. And a test apparatus 16 for performing the test.

[0016] Incidentally, between the mobile terminal 11 and the radio base station 12, for example, digital car telephone system standard (RCR STD-27B) and second generation cordless telephone system standards (PHS, RCR STD-28)
Is applied.

FIG . 2 is a block diagram showing the configuration of the mobile terminal 11 in FIG. This mobile terminal 11 is a radio base station 1
A wireless unit 21 that receives an incoming call in a wireless line connection from the wireless communication unit 2 and sends out a signal obtained by frequency-converting or demodulating an audio test signal and a call voice signal;
A control unit 22 for executing control for determining whether the wired communication path between the mobile terminal 11 and the wireless base station 12 and the wired communication path between the wireless base station 12, the mobile communication exchange 13 and the communication network 14 is normal or abnormal; have.

The microphone transmits the mobile terminal 11, an audio test signal from the test device 16 received via the wireless base station 12 a predetermined time (e.g., several seconds) and the delay circuit 23 to be sent with a delay, the transmission signal A telephone handset 24 such as a speaker for outputting a reception signal as voice,
An audio signal for encoding and transmitting a transmission signal from a microphone (not shown) of the handset 24, and a codec process for transmitting a decoded incoming call voice signal and the like to a speaker (not shown) of the handset 24 Processing unit 25
And

[0019] The mobile terminal 11, the data signal processing unit 26 for processing the data between the radio unit 21 and the control unit 22
And an operation unit 27 for performing power on / off, off / on hook for outgoing / incoming calls, input of telephone numbers, and selection of various functions.
And a display unit 28 for displaying various processing states, for example, a reception state on a screen, and storing a control program.
It has a memory 29 in which settings for testing a wired communication path and a wireless communication path with an audio test signal are made in advance.

FIG . 3 is a block diagram showing a configuration of the test apparatus 16 in FIG. The test apparatus 16 includes a sound source 31 for transmitting an audio test signal, a delay circuit 32 for delaying and outputting the audio test signal from the sound source 31, a return audio test signal from the mobile terminal 11, and a delay circuit 3
Sound determination unit 33 for determining whether the wired communication path and the wireless communication path are normal or abnormal from the audio test signal from
And a codec section 34 for encoding a transmission signal from a microphone (not shown) of the handset 35 and outputting the encoded signal to the communication I / F section 40, and for sending out an incoming call voice signal and the like decoded to a speaker (not shown). Have.

Further, the test device 16 includes a handset 35 for calls made by a speaker for outputting audio microphone and the received signal and sends the transmission signal, and controls each unit, with the control of the mobile phone , Especially mobile terminal 1
Wireless link between the wireless base station 1 and the wireless base station 12 and the wireless base station 1
2. It has a control unit 36 for executing control to determine whether the wired communication path and the wireless communication path between the mobile communication exchange 13 and the communication network 14 are normal or abnormal.

Furthermore, the test device 16, power on / off, off / on-hook for the calling and called, an operation unit 37 for performing function selection of the telephone number input, various, various processing conditions, for example, reception state Display section 38 for displaying on a screen
And a memory 39 storing a control program and the like, and a communication I / F unit 40 for processing a communication interface (I / F) with the communication network 14.

Next, the operation of this embodiment will be described. First, the operation of each unit of the mobile terminal 11 and the test device 16 will be described. The wireless unit 21 of the mobile terminal 11 receives an incoming call from the wireless base station 12 in a wireless line connection, and sends out a signal obtained by frequency conversion or demodulation of an audio test signal or a call voice signal. The control unit 22 controls each unit. The control unit 22 controls the radio communication between the mobile terminal 11 and the radio base station 12 and the wired communication path between the radio base station 12, the mobile communication exchange 13 and the communication network 14 to determine whether the radio communication is normal or abnormal. Execute

The delay circuit 23 transmits the audio test signal received from the test apparatus 16 through the radio base station 12 with a delay of a predetermined time (for example, several seconds), and the transmitter / receiver 24 transmits the transmission signal. A telephone conversation using a microphone to be transmitted and a speaker to output a reception signal as voice is performed. The audio signal processing unit 25 encodes and outputs a transmission signal from a microphone (not shown) of the transmitter / receiver 24, and performs a codec process for transmitting a decoded incoming call audio signal or the like to a speaker (not shown).

Furthermore, the operation unit 27 processes the data between the radio unit 21 and the control unit 22, display unit 28 is powered on /
Off, off / on hook for outgoing and incoming calls, telephone number input and various function selections. Further, the display unit 28 displays various processing states, for example, reception states on a screen, the memory 29 stores a control program for the control unit 36 to execute control, and the memory 29 stores an audio test signal. The setting for performing the test control of the wired communication path and the wireless communication path is performed.

In the test apparatus 16, the delay circuit 32 delays and outputs the audio test signal from the sound source 31.
The sound determination unit 33 determines whether the wired communication path and the wireless communication path are normal or abnormal based on the returned audio test signal from the mobile terminal 11 and the audio test signal from the delay circuit 32.
The codec 34 encodes a transmission signal from a microphone (not shown) of the transmitter / receiver 35 and outputs the encoded signal to the communication I / F 40, and sends out a decoded incoming call voice signal or the like to a speaker (not shown).

[0027] In addition, the test device 16, handset 35
Operates as a microphone for transmitting a transmission signal, a speaker for outputting a reception signal as a voice, and the like, and a control unit 36 controls each unit, and controls the mobile phone, and particularly, the mobile terminal 11 and the radio base station. Radio line and radio base station 12, mobile communication exchange 13 and communication network 1
The control for judging whether the wired communication path is normal or abnormal is performed.

Furthermore, the test device 16, power on / off operation unit 37, off / on-hook for the calling and called, with the telephone number input, various function selection is made,
The display unit 38 displays various processing states, for example, reception states on a screen. In addition, a control program and the like are stored in the memory 39, and the communication I / F unit 40 communicates with the two communication networks 14.
/ F is processed.

Next, the operation of the entire outline is described with reference to FIG. FIG. 4 is a sequence diagram of the operation of the configuration shown in FIG. 1 and 4, a test apparatus 16 transmits a communication network 14, a mobile communication exchange 13 and a radio base station 12 to each other.
To the mobile terminal 11 through. The mobile terminal 11 responds to the incoming call, and the wireless line with the wireless base station 12 is connected. Control for forming a return path is performed inside the mobile terminal 11.

[0030] The folded path, the reception signal sent to the speaker of the audio test signal test device 16 sends, which transmits folded as transmission signal from the microphone, an audio test signal which is the received signal After being delayed and returned as a transmission signal, the radio base station 1
2. Return to the test equipment 16 through the mobile communication exchange 13, the communication network 14, and so on. The test apparatus 16 determines whether the audio test signal delayed internally and the return audio test signal delayed by the mobile terminal 11 match in time, and determines whether the wired communication path and the wireless communication path are normal or abnormal.

[0031] Next, a description will be given of detailed operation. FIG.
6 is a flowchart showing a processing procedure of an operation at the start of a test in the mobile terminal 11. In step S51, the mobile terminal 1
The first radio unit 21 receives an incoming call from the radio base station 12,
The control unit 2 performs frequency conversion and demodulation on the audio test signal and the call voice signal, and performs data conversion on the control unit 2 through the data signal processing unit 26.
2 and to an audio signal processing unit 25 that performs decoding in the codec. Audio signal processing unit 2
Reference numeral 5 encodes a transmission signal from a microphone (not shown) of the handset 24 and outputs the encoded signal to the radio unit 21, and sends a decoded incoming voice signal to a speaker (not shown).

Next, the control unit 22 at step S52 fetches an audio test signal, incoming to the display unit 28 in step S53 (busy) starts a display (ON). Next, in step S54, for example, the audio test signal is compared with data stored in advance in the memory 29 to determine whether the wired communication path and the wireless communication path are normal or abnormal (test). In other words, the return transmission of the audio test signal is identified. Here, in the case of the return transmission, the delay circuit 23 is activated in step S55, and the audio test signal is transmitted to the delay circuit 23. Here, for example, a delay process for several seconds is performed and transmitted to the audio signal processing unit 25. Processing such as decoding is performed, and the wireless base station 1
Send to 2.

[0033] The transmission sequence between the mobile terminal 11 and the radio base station 12 in this case is, for example, digital car telephone system standard (RCR STD-27
B) and the second generation cordless telephone system standard (PH
S, RCR STD-28).

FIG . 6 is a flowchart showing a processing procedure of the operation when the mobile terminal 11 stops the test. Step S6
In step 1, the radio unit 21 of the mobile terminal 11 receives the test stop incoming call from the radio base station 12 to determine whether the wired communication path and the wireless communication path transmitted from the test apparatus 16 shown in FIG. The frequency conversion and demodulation are performed on the audio test signal and the call voice signal for which the test is stopped, and the data is transmitted to the control unit 22 from the data signal processing unit 26. Next, step S
At 62, upon receiving the audio test signal for stopping the test, the control unit 22 executes the open transmission of the wireless line between the mobile terminal 11 and the wireless base station 12.

Next, in step S63, performs a control by the control unit 22 stops the incoming (busy) display of the display unit 28. Next, in step S64, the setting of the determination (test) of normal or abnormal of the wired communication path and the wireless communication path, that is, the setting of the return of the audio test signal is determined, and the operation of the delay circuit 23 is stopped in step S65. Control.

FIG . 7 is a flowchart showing a processing procedure of the operation at the start of the test in the mobile terminal 11. Step S7
In step S1, when the operation unit 37 of the test apparatus 16 shown in FIG. 3 instructs the start of a test to determine whether the wired communication path and the wireless communication path are normal or abnormal, in step S72, the control unit 36 receives the test start instruction. Sends the off-hook signal to the mobile communication exchange 13 shown in FIG. 1 through the codec section 34 and the communication I / F section 40, and transmits the signal from the radio base station 12 to the mobile terminal 11. Further, the operation unit 37 is determined in step S73.
The dial number for the mobile terminal 11 from is input,
Similarly to the above, the codec unit 34 and the communication I / F unit 4
0 to the mobile communication exchange 13 shown in FIG.
The signal is transmitted from the wireless base station 12 to the mobile terminal 11.

In step S74, the mobile terminal 1 for transmission
When the control unit 36 receives a response from the wireless base station 12 through the wireless line connection from the control unit 1, the control unit 36 activates the sound source 31, the delay circuit 32, and the sound determination unit 33 in step S75. The audio test signal from the sound source 31 is delayed by the delay circuit 32 and transmitted to the sound determination unit 33. The delay here is a total of the delay time through the delay circuit 23 shown in FIG. 2 and the delay times in the wired communication path and the wireless communication path.

FIG . 8 is a flowchart showing the processing procedure of the operation of the test apparatus 16 for judging whether the wired communication path and the wireless communication path are normal or abnormal. When the sound source 31 is activated in step S75 shown in FIG. 7, the audio test signal from the sound source 31 is transmitted through the codec unit 34 and the communication I / F unit 40 to the audio test signal shown in FIG.
To the mobile communication exchange 13 shown in FIG.
Is transmitted to the mobile terminal 11. The transmitted audio test signal is received by the mobile terminal 11 and transmitted (returned) as a returned audio test signal after being delayed by the delay circuit 23 shown in FIG. Step S81 in FIG.
Then, the sound determination unit 33 captures the returned audio test signal via the communication I / F unit 40 of the test apparatus 16.

In step S 82, the audio test signal from the mobile terminal 11 and the audio test signal from the delay circuit 32 fetched by the sound judging unit 33 are judged. For example, a beat signal is generated by mixing the returned audio test signal and the audio test signal from the delay circuit 32, and when there is no sound (no phase shift), the transmitted audio test signal passes through the wired communication path and the wireless communication path. It is determined that the data has been transmitted normally.

When the returned audio test signal and the audio test signal from the delay circuit 32 are output with a time difference, it is determined that the audio test signal has been returned in the middle of the wired communication path and the wireless communication path. If the return audio test signal cannot be received, it is determined that the line disconnection is abnormal in the middle of the wired communication path and the wireless communication path. Sound determination unit 33
The control unit 36 captures the determination of the normal or abnormal state of the wired communication path and the wireless communication path from the control unit 36 and displays it on the display unit 38. For example, a normal or abnormal condition in the middle of the wired communication path and the wireless communication path and the content thereof (return on the way, disconnection of the line) are displayed on the screen in characters.

FIG . 9 is a flowchart showing the processing procedure of the operation of the test apparatus 16 for ending the determination of the normal or abnormal state of the wired communication path and the wireless communication path. In step S91, when the operation unit 37 of the test apparatus 16 shown in FIG. 3 instructs the end of the test for determining whether the wired communication path and the wireless communication path are normal or abnormal, the on-hook signal is transmitted to the codec unit 34 and the communication I
The signal is transmitted to the mobile communication exchange 13 shown in FIG. 1 through the / F unit 40 and transmitted from the radio base station 12 to the mobile terminal 11.
Further, the control unit 36 controls the operation of the sound source 31, the delay circuit 32, and the sound determination unit 33 to stop in step S92.
Do.

In this embodiment, the sound judging unit 33 of the test apparatus 16 listens to the beat sound output obtained by synthesizing the returned audio test signal returned from the mobile terminal and the audio test signal delayed by the delay circuit of the test apparatus. Thus, whether the wired communication path and the wireless communication path are normal or abnormal is determined, but other methods may be used. For example, the waveform of the returned audio test signal returned from the mobile terminal 11 and the waveform of the audio test signal delayed by the delay circuit 32 of the test apparatus 16 are displayed on a screen such as an oscilloscope, and a determination is made based on the matching state of the time axis of the two waveforms. It is also possible. In this case, the delay time is set to a time at which the delay can be observed by an oscilloscope or the like that observes the delay time. Alternatively, the synthesized beat sound output may be determined by listening to the synthesized sound output using a synthesized sound output circuit.

[0043] Further, in this embodiment, it has been described with a mobile terminal 11 and the radio base station 12 one by one, each of the wired communication channel and radio channel in a plurality of mobile terminals and the radio base station is normal or abnormal Is also possible. In this case, the test apparatus 16 identifies the wireless base station with the identification code (I
D) is specified and selected, and the mobile terminal is specified and selected by the telephone number or the like of the mobile terminal, and the normal or abnormal determination of the wired communication path and the wireless communication path may be performed in the same manner as described above. .

[0044]

As is apparent from the above description, according to the mobile communication network communication path test method of the present invention, a test apparatus transmits an audio test signal to a mobile terminal through a communication exchange, a wired communication path, and a wireless communication path. Send and delay from mobile terminal
By comparing the returned audio test signal with the audio test signal delayed by the test device, it is determined whether the wired communication path and the wireless communication path are normal or abnormal.

[0045] As a result, the return audio test signal delayed relative to the audio test signal test device is delivered, normally wired communication channel and the radio channel is to find if taken after the predetermined delay time. That is, the audio test signal is clearly distinguished from the audio test signal received due to a short circuit in the middle of the wired communication path and the wireless communication path, so that erroneous determination is eliminated and test reliability is improved.

[0046] Further, according to the mobile communication network speech path test method <br/> of the present invention, the back audio test signal from the mobile terminal,
Alignment of the time axis at the time of the two waveforms of the delivery audio test signal to the mobile terminal displayed on the screen or synthesized wired communication path及 beauty wireless communication path of normal or different beat sound output,
Always judge. As a result, transmission frequency band characteristics
Even if the tone signal is difficult to hear well,
It is easy to determine whether the communication path and wireless communication path are normal or abnormal.
Come to come.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a system for implementing a mobile communication network communication channel test method of the present invention.

FIG. 2 is a block diagram showing a configuration of a mobile terminal in FIG.

FIG. 3 is a block diagram showing a configuration of a test apparatus in FIG.

FIG. 4 is a sequence diagram of an operation of the configuration shown in FIG. 1;

FIG. 5 is a flowchart showing a processing procedure of an operation at the time of starting a test in the mobile terminal according to the embodiment.

FIG. 6 is a flowchart illustrating a processing procedure of an operation when a test is stopped in the mobile terminal according to the embodiment.

FIG. 7 is a flowchart illustrating a processing procedure of an operation when a test is started in the mobile terminal according to the embodiment.

FIG. 8 is a flowchart illustrating a processing procedure of an operation of determining whether the wired communication path and the wireless communication path are normal or abnormal in the test apparatus according to the embodiment.

FIG. 9 is a flowchart illustrating a processing procedure of a normal or abnormal determination termination operation of the wired communication path and the wireless communication path in the test apparatus according to the embodiment.

FIG. 10 is a block diagram showing a configuration of a conventional mobile communication channel test system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 mobile terminal 12 wireless base station 13 mobile communication switch 14 communication network 16 test equipment 21 radio unit 22, 36 control unit 23 delay circuit 25 audio signal processing unit 29, 39 memory 31 sound source 32 delay circuit 33 sound determination unit 34 codec unit 38 display unit 40 communication I / F unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H04B 17/00 H04B 3/46 H04B 7/26

Claims (3)

(57) [Claims] 1. A mobile terminal , a communication exchange and a communication network ,
Having a wireless communication path及 beauty wired communication path for connecting between these
In the mobile communication network, the mobile terminal delays and returns an audio test signal at an incoming call from a wireless communication path,
Transmitting the audio test signal test apparatus through the communication switching unit and a wired communication channel and a wireless communication path connected to the communication network to the mobile terminal, the <br/> return audio test signal from said mobile terminal , a comparison to the mobile communication network speech path test method <br/> judge the normality or abnormality of the radio communications channel and a wired communication path with the audio test signal transmitted from the device, back in the test device Audio test signal delay time
The mobile communication network speech path test method being characterized in that the said delay time in the mobile terminal and the radio channel and time plus the delay time that occurs in a wired communication path. 2. A waveform display screen for displaying two waveforms of an audio test signal returned from a mobile terminal and an audio test signal delayed by the test device as a determination of normality or abnormality of the wired communication path and the wireless communication path of the test apparatus.
The mobile communication network communication path according to claim 1 , wherein when the two waveforms match on the time axis , the wired communication path and the wireless communication path are determined to be normal, and when they do not match, the communication path is determined to be abnormal. Test method . 3. A beat sound obtained by synthesizing an audio test signal returned from a mobile terminal and an audio test signal delayed by a delay circuit of the test apparatus, as a determination of normality or abnormality of a wired communication path and a wireless communication path of the test apparatus. generates a movement of the beat sound is judged wired communication channel and the wireless communication path is normal when the silence, according to claim 1, characterized by abnormal and determine <br/> constant when the voice Communication network test method .