KR20040076101A - System for automatic testing and detecting a bad call quality block in mobile telecommunication network and method for controlling the same - Google Patents

Abstract

PURPOSE: A system and method for automatically diagnosing/detecting a defective call interval of a mobile communication network are provided to quickly and accurately check a section with degraded speech quality. CONSTITUTION: An ALBT(Automatic Loop-Back Tester)(10) stores a received testing voice signal, compares it with previously stored data to measure speech quality, transmits the testing voice signal to a VCMT(Voice Call Mean of opinion score Tester)(60) and performs a general operation to measure speech quality. A base station controller(30) performs a function of inter-cell handoff processing, call controlling, and operating, maintaining and controlling of a base station(40). The base station(40) provides a mobile communication service to a subscriber by wirelessly communicating with a mobile terminal located in a cell. The VCMT(60) measures the quality of a voice and a tone by transmitting/receiving the voice or the tone to/from a path set by forming a loop.

Description

System for automatic testing and detecting a bad call quality block in mobile telecommunication network and method for controlling the same}

The present invention relates to the quality of a mobile communication network, and more particularly, to a system and method for automatically diagnosing and detecting a bad call interval.

In the related art, when a subscriber using a mobile communication terminal had a complaint of a call, it did not immediately find out in which section there was a problem.

That is, when a user reports a complaint of a call, there is a problem in that it does not satisfy the user's desire to improve and maintain the call quality by taking a passive test form that examines call quality according to a corresponding region and path.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a system and method capable of quickly and accurately inspecting a section of deterioration of call quality, and capable of measuring call quality at any time without a user's operation.

1 is a schematic block diagram of a system for automatically diagnosing / detecting a bad call section in a mobile communication network according to the present invention.

2A, 2B, and 2C are flowcharts illustrating the operation of the automatic diagnosis / detection system for a bad call section according to the first embodiment of the present invention.

3A and 3B are protocol charts showing a schematic flow of the first embodiment according to Figs. 2A, 2B and 2C.

4A and 4B are protocol charts illustrating a method for automatically diagnosing / detecting a call quality defect section of a mobile communication network according to a second embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: call quality measuring device (ALBT) of exchange side 11: landline telephone line

20: Mobile communication switch (MSC) 22: Time switch

23: space switch 24, 31: time switch

30: base station controller (BSC) 34: vocoder control processor

40: base station (BTS) 41: Traffic Channel Element

60: terminal call quality measurement device 63, 64, 65: wired line (α, β, γ)

70: optical end station device 71: Ethernet port

80: base station controller management device (BSM) 90: hub (HUB)

In order to achieve the above object, the present invention provides a system for measuring call quality of a mobile communication network, comprising: a terminal side call quality measuring device connected to a base station of the mobile communication network and performing a call function; And a call path connected to a mobile communication exchange of the mobile communication network to form a call path with the terminal-side call quality measuring device, and to transmit and receive voice by loopback divided into a plurality of stages for each section. And an exchange side call quality measuring device for measuring the call quality by forming a call path with the terminal side call quality measuring device.

Hereinafter, the present invention will be described with reference to FIGS. 1 through 4b.

1 is a schematic block diagram of a system for automatically diagnosing and detecting a bad section in a mobile communication network according to the present invention, and FIGS. 2A, 2B, and 2C are diagrams for automatically diagnosing and detecting a bad section in accordance with a first embodiment of the present invention. 3A and 3B are protocol charts showing the schematic flow of the first embodiment according to Figs. 2A, 2B and 2C, and Figs. 4A and 4B are calls of a mobile communication network according to the second embodiment of the present invention. Protocol chart showing the automatic diagnosis / detection method of quality defect section.

The mobile communication network according to the present invention is as shown in FIG. 1 and is for explaining the call test according to the present invention in more detail.

Through the fixed line (11) connected to the mobile switching center (MSC: Mobile Switching Center: 20), the ALBT (10: Automatic LoopBack Tester: below) The call quality measuring device 10 is connected to an Ethernet Line (13: hereinafter referred to as an "Ethernet Line") for TCP / IP communication, and the mobile communication switch 20 and the BSM ( Base Station Manager: hereinafter referred to as "Base International Controller": 80), BSC (Base Station Controller: referred to as "Base International Controller": 30), VCMT (Voice Call Mean of Opinion Score Tester) hereinafter "Measurement device": 60).

Switching side call quality measuring device 10 has the same call function as a general wired telephone, and stores the received test voice signal and measures the call quality by comparison with previously stored data, and the terminal side call quality measuring device. Transmit test voice signal to (60) and perform overall operation to measure call quality.

The switch switch structure of the mobile communication switch 20 is simple (T, Time, Switch)-S (Space switch) as shown in Figure 1 (22, 23, 24) to handle a large amount of traffic (traffic) -It is designed by T (Time switch) method. In this case, a loop is placed on the time switch side of the rear end of the T-S-T switch, and a voice sample is transmitted and received to measure the abnormality of the T-S-T switch. In this path (segment 1), if the switch operates normally, the voice sample cannot be distorted, so the voice quality test (MOS) value should be normal. If the switch is not normal, there is a problem with the switch.

The base station controller 30 is matched with a plurality of base stations (BTS: Base Station Transceiver System: 40), inter-cell handoff processing, call control, operation and maintenance of the base station 40. It performs functions such as maintenance control, and has a plurality of vocoders (only one of the vocoders 32 and 33: shown) having a pair of the encoder 32 and the decoder 33 therein.

The test here forms a loop at the time switch 31 at the front end before passing through the vocoder, so that the TST switch of the mobile communication switch 20, the relay section between the base station controller 30 and the mobile communication switch 20, and the mobile communication switch 20 can be used. The abnormality of the path | route 2 to the front end T_SW22 of (20) is measured.

If the switch operates normally in this path, the voice samples cannot be distorted, so the MOS value should be normal. If this is not the case, there is a problem with the switch or the relay section.

The mobile communication switch 20 is equipped with a plurality of vocoder cards including a plurality of vocoders in which the encoder 32 and the decoder 33 are paired.

In this case, a loop is formed at the encoder 32 output terminal and the decoder 33 input terminal of the selected vocoder, and the voice or tone sample is transmitted and received through the set path 3 to measure the voice or tone quality. In this case, since the voice is distorted when the vocoder 32 and 33 passes, the voice quality (MOS) value is evaluated according to the performance of the vocoder 32 and 33.

In general, the area of power of the base station 40 is called a cell, and the base station 40 wirelessly communicates with a mobile communication terminal in the cell to provide a mobile communication service to a subscriber. To this end, the base station 40 transmits and receives a radio signal with the terminal-side call quality measuring apparatus 60 having a mobile communication terminal function by performing encoding and decoding of a radio channel. In addition, in order to provide a better quality wireless call as a whole, transmit / receive signal strength adjustment, uplink quality measurement, spatial diversity function, radio resource management, and self-maintenance function are performed.

The communication between the base station controller 30 and the base station 40 uses an asynchronous transmission (ATM) scheme, which adds an addressed overhead bit to each message to efficiently use a limited link. In this case, a loop is formed on the assigned channel elements, and voice or tone samples are sent and received through the set path to measure voice or tone call quality. By testing this route 4, it is possible to determine whether there is an abnormality in the ATM communication and the channel element.

The terminal side call quality measuring apparatus 60 for the test of the call quality can be controlled by the exchange side call quality measuring apparatus 10. The terminal-side call quality measuring device 60 has a self-diagnostic function, and the exchange-side call quality measuring device 10 periodically polls the terminal-side call quality measuring device 60, and over Ethernet or a call path. The power is turned on / off by the received DTMF control signal and performs an operation by a command such as a reset.

In general, if the mobile communication terminal and the base station 40 are in a wireless section, or if the terminal-side call quality measuring device 60 and the base station 40 are left in the air section, α, β, and γ in a wireless section (generally, Allocating to three regions and operating a base station), only the radio channel corresponding to the corresponding direction is occupied by the terminal-side call quality measuring device 60 to inspect and thus cannot test each of α, β, and γ. Is generated. That is, when the terminal-side call quality measuring device 60 is fixedly installed in a specific area, there is a problem that it is impossible to inspect each wireless environment area. In order to solve this problem, in the present invention, the terminal-side call quality measuring device 60 and the base station 40 are connected by wires 63, 64, and 65 so that the terminal-side call quality measuring device 60 is connected to an external radio wave environment. Avoid exposure.

Then, the transmission and reception paths according to each wireless environment are connected by wire, and the terminal side call quality measuring apparatus 60 can selectively change the wireless environment. That is, when the terminal-side call quality measuring device 60 receives the α, β, and γ selection commands from the exchange-side call quality measuring device 10, α, β by the internal control switch of the terminal-side call quality measuring device 60. The test was conducted by selecting the radio environment and γ respectively.

In the present invention, the terminal-side call quality measuring apparatus 60 forms a loop to measure voice and tone quality by sending and receiving voice or tone samples in a set path. As illustrated in FIG. 1, by testing each path 1, 2, 3, 4, and 5, the call quality of each section can be measured.

The terminal-side call quality measuring device 60 includes an Ethernet interface line (Ethernet Interface Line: 72), an Ethernet port (71), an optical end station device (70), an optical fiber line (STM-1: optical cable) or a dedicated line (E1), and a base station controller. 30, the base station controller management device 80, the hub 90 and, via the Ethernet interface 13 is connected to the exchange-side call quality measurement device 10 is operated in conjunction with each other. The terminal-side call quality measuring device 60 and the exchange-side call quality measuring device 10 may use a separate control signal transmission method (using an Ethernet interface) or may use a channel together with a control signal channel (using DTMF). It was made.

First Embodiment for Checking Call Quality Through an Ethernet Interface

Hereinafter, a detailed operation according to the present invention will be described with reference to FIGS. 2A, 2B and 2C.

In step 110 of FIG. 2A, it is checked whether the exchange-side call quality measuring apparatus 10 is normal. If not normal, wait until the exchange call quality measuring device 10 is normal.

In step 110 of FIG. 2A, if the exchange-side call quality measuring device 10 is normal, the call path setting information for setting the call path is obtained from the base station controller management device 80 through the Ethernet interface line 13. (Step 130).

Thereafter, the exchange-side call quality measuring device 10 transmits a call setup start request message to the terminal-side call quality measuring device 60 through the Ethernet interface 13 (step 140). When the terminal-side call quality measuring device 60 receives the call setup start request message, the terminal-side call quality measuring device 60 makes a call to the switched-side call quality measuring device 10 through the wired telephone line 11. .

Terminal-side call quality measuring device (60)-Base station (40)-Base international flag (30)-Mobile communication exchange (20)-Switching call quality measurement device (10) The call path is formed with the quality measuring device 60 and the exchange-side call quality measuring device 10 (step 160).

Thereafter, the terminal-side call quality measuring apparatus 60 transmits the prepared Pulse Code Modulation (PCM) voice signal file to the exchange-side call quality measuring apparatus 10 through the pre-formed call path (step 170).

The exchange-side call quality measuring apparatus 10 compares the prestored voice source sound with the received voice signal and measures the call quality (MOS) for the reverse direction (step 180).

The exchange-side call quality measuring apparatus 10 transmits a voice signal to the terminal-side call quality measuring apparatus 60 through the formed call path (step 190). The terminal-side call quality measuring device 60 calculates a call quality (MOS) value for the voice signal sent from the exchange-side call quality measuring device 10 (200). Then, the measured call quality (MOS) is transmitted to the switching side call quality measuring apparatus 60 through the Ethernet network (210).

The exchange call quality measurement apparatus 10 stores the call quality value (MOS) for the received forward direction, and in step 220, the exchange call quality measurement apparatus 10 is equal to or less than an average value of the call quality measurement results for the reverse direction and the forward direction. (Step 220). If the calculated call quality is less than the average value, the call quality is regarded as normal (step 370). If the call quality is less than the average value, it is considered that the voice quality is bad, and the work so far is stored in a database (230). Thereafter, a loop-back test for each section is performed to find out in which section a defect has occurred (240).

When the voice signal prepared in advance by the exchange side call quality measuring device 10 is sent for loop back call quality measurement between the exchange side call quality measuring device 10 and one section (see FIG. 1), the exchange side call quality measurement is performed. The audio signal is returned through the section 1 in the device 10.

At this time, the returned audio signal is compared with the original audio signal, and if it is not normal, error information is displayed and the result is stored in a database (step 261). Thereafter, the process proceeds to step 370.

If the result of the loop-back test between the exchange call quality measuring device 10 and the 1 section is normal, the call quality measuring device of the exchange side is performed to perform the loop-back test for the second section. When the voice signal prepared in advance at 10 is sent, the voice signal is returned by the exchange-side call quality measuring apparatus 10 through two sections. At this time, the returned voice signal is compared with the original voice signal, and if it is not normal, error information is output and the result is stored in the database of the exchange call quality measuring apparatus 10 (step 290). Thereafter, the process proceeds to step 370.

If the result of the loop-back test between the switch-side call quality measuring device 10 and the second section is normal, the voice signal test (loop-back test) with the switch-side call quality measuring apparatus 10 is performed next. In order to transmit the voice signal prepared in advance by the exchange side call quality measuring apparatus 10, the voice signal is returned to the exchange side call quality measuring apparatus 10 through three sections (step 300). In this case, the returned voice signal is compared with the original voice signal (step 310), and if it is not normal, error information is output and the result is stored in the database (step 320). Thereafter, the process proceeds to step 370.

If the result of the loop-back test between the exchange call quality measuring device 10 and the 3 section is normal, the voice signal test of the exchange call quality measuring device 10 and the 4 section is next. To this end, when the exchanged call quality measuring device 10 sends a voice signal prepared in advance, the exchanged call quality measuring device 10 returns the voice signal through four sections (step 330). In this case, the returned voice signal is compared with the original voice signal (step 340), and if it is not normal, error information is output and the result is stored in the database (step 350). Thereafter, the process proceeds to step 370.

If the result of the loop-back test between the exchange call quality measuring device 10 and the 4 section is normal in step 340, the voice signal test (Loop-) with the exchange call quality measuring device 10 is performed next. In order to perform a back test, the voice signal prepared in advance by the exchange side call quality measuring apparatus 10 is sent, and the voice signal is returned by the exchange side call quality measuring apparatus 10 through 5 sections (step 360). At this time, the returned audio signal is compared with the original audio signal (step 361). If it is not normal, error information is output and the result is stored in the database (step 362). Thereafter, the process proceeds to step 370.

In step 370, the exchange-side call quality measuring apparatus 10 transmits a release command to the terminal-side call quality measuring apparatus 60 through the Ethernet interface 13 to the currently set call (step 370). Thereafter, the terminal-side call quality measuring device 60 releases the currently set call path when receiving a call release command (step 380).

In the exchange call quality measuring device 10, it is determined whether the test for the specified number in the exchange call quality measuring device 10 has been completed (step 390). If the test has ended, stop further work and end the work.

3a and 3b schematically show an embodiment according to Figs. 2a, 2b and 2c, wherein the exchange call quality measuring device 10 transmits the call setting information through the Ethernet interface (Ethernet Interface Line 13). Obtained from 80. Thereafter, in step 900, the exchange-side call quality measuring apparatus 10 transmits a call setup start request message to the terminal-side call quality measuring apparatus 60 through the Ethernet interface 13. At this time, the Ethernet network used is the hub 90, the base station controller management device 80, the base station controller 30, dedicated line (E1) or optical cable (STM-1), optical end station device 70, Ethernet The interface 72 may be used, and the exchange-side call quality measuring device 10 and the terminal-side call quality measuring device 60 may be connected to each other via a separate internet network.

When the terminal-side call quality measuring device 60 receives the call setup start request message in step 910, the terminal-side call quality measuring device 60 makes a call to the exchange-side call quality measuring device 10.

At this time, a plurality of wireline telephone line 11 is assigned to the exchange-side call quality measuring apparatus 10 can perform the call quality measurement operation with a plurality of terminal-side call quality measuring device 60 of course.

When the call path is connected in step 920, the terminal-side call quality measuring device 60 transmits the prepared PCM (Pulse Code Modulation) voice signal file to the exchange-side call quality measuring device 10 through the pre-configured channel in step 930. . At this time, the exchange-side call quality measuring apparatus 10 compares the prestored voice source sound with the received voice signal and measures the call quality (MOS) for the reverse direction. Then, the exchange side call quality measuring apparatus 10 sends the PCM voice signal promised for the measurement of the forward call quality to the terminal side call quality measuring apparatus 60 through the formed call path.

In step 940, the terminal-side call quality measuring device 60 measures the call quality with respect to the voice signal sent from the exchange-side call quality measuring device 10, and sends the measured call quality to the exchange-side call quality measuring device 10. .

In step 950, the exchange-side call quality measuring device 10 stores the call quality value (MOS) related to the received forward direction, and if the call quality is less than the average value, proceeds to step 960, otherwise proceeds to step 951 to store the information. do. In step 960, the exchange-side call quality measuring apparatus 10 sequentially performs a loopback test as described above, detects a defective section according to the test result, and stores measurement information.

In step 970, when the call quality measurement is completed, the exchange-side call quality measuring apparatus 10 transmits a call release request message to the terminal-side call quality measuring apparatus 60, and thus, the terminal-side terminal side call quality measuring apparatus 60 ) Releases the channel and ends the operation.

In the above description, although the loopback test was performed by the exchange-side call quality measuring device 10, the call quality measurement may be made by the loopback of the terminal-side call quality measuring device 60. In addition, it is a matter of course that the call quality can be measured by the loopback on both the terminal side and the exchange side (10, 60).

In addition, the communication failure in the forward or reverse direction in each section can also be specifically known based on the forward and reverse call quality and interval call quality measurement values obtained by the previous steps 930 to 940. For example, if it is measured that the call quality is bad in one section while the call quality is bad in the forward direction, it can be seen that there is a defect in the part related to the forward even in one section.

In addition, in step 950, the loopback test operation may not be performed only by the forward call quality, but the loopback test may be performed due to poor call quality in one of the forward and reverse directions.

In the case of the first embodiment, if the call quality is deteriorated in a specific section, the measurement is not made in the subsequent section, but the call quality measurement in the opposite direction may be continued. For example, even if it is determined that the call quality deteriorates in one section by the loopback test of the exchange-side call quality measuring device 10, the terminal-side call quality measuring device 60 performs the loopback test, and thus, even in five additional sections. The deterioration of call quality can be checked.

Embodiment 2 of Checking Call Quality Using DTMF

According to a second embodiment of the present invention, transmission and reception of control signals between the exchange-side call quality measuring device 10 and the terminal-side call quality measuring device 60 are performed using DTMF signals in a state in which a call path is connected.

Based on the preset value in step 600 of FIG. 4A, the switching side call quality measurement apparatus 10 selects the base station controller 30 and the mobile communication exchange 20 to be tested. To this end, the mobile communication is inputted by inputting a user identifier (UserID) and password (Password) determined for the connection operation of the mobile communication exchanger 20 and the base station controller 30 in the console of the call quality measurement device 10 of the exchange side. Log in to the switch 20 and the base station controller 30, respectively.

Thereafter, the BTS and the SIP (Subscriver Interface Processor) implementation status in the base station controller 30 to be tested are inquired according to the designated menu (step 620).

In step 630, a CEP (Channel Element Processor) and a SIP (Subscriber Interface Processor) to be tested may be selected according to a designated menu operation of the exchange side call quality measuring apparatus 10 (630). A channel element processor (CEP) and a SIP to be tested are selected 630 according to a sequentially designated procedure. The VCH (Vocoder Channel) and the TCE (Traffic Channel Element) to be tested are selected (step 640). In step 650, a call path is reserved in the mobile communication network based on the selected mobile switching center, BSC, CEP, SIP, VCH, and TCE. This is reserved according to the instructions provided by the mobile communication switch 20.

Thereafter, the exchange-side call quality measuring device 10 calls the terminal-side call quality measuring device 60 (660). When a call path is formed between the exchange-side call quality measuring device 10 and the terminal-side call quality measuring device 60 (670), the terminal-side call quality measuring device 60 passes to the exchange-side call quality measuring device 10. A Dual Tone Multi Frequency (DTMF) message is sent to indicate that the setting is completed (680) (step 680).

Next, the exchange side call quality measuring apparatus 10 transmits the telephone number of the exchange side call quality measuring apparatus 10 to the terminal side call quality measuring apparatus 60 (step 690). This is to allow the terminal-side call quality measurement device 60 to make a telephone connection to the exchange-side call quality measurement device 10. When the terminal-side call quality measuring device 60 receives the telephone number normally, the terminal 700 sends a message 700 indicating that the telephone number has been normally received to the switching side call quality measuring apparatus 10 using DTMF. Thereafter, the terminal-side call quality measuring device 60 releases the call path between the exchange-side call quality measuring device 10 and the terminal-side call quality measuring device 60 (step 710).

Thereafter, the terminal-side call quality measuring device 60 sets a call path by making a call to the exchange-side call quality measuring device 10 (step 730).

When the call path setting is completed, the terminal-side call quality measuring device 60 and the wired telephone line 11 are passed through the base station 40, the base station controller 30, the mobile communication switch 20, and the exchange-side call quality measuring device 10. ), You can call.

Thereafter, the exchange-side call quality measuring apparatus 10 sends the PCM voice signal file prepared in advance to the terminal-side call quality measuring apparatus 60 through the pre-formed call path (step 740). The terminal-side call quality measuring device 60 compares the prestored voice signal with the received voice signal, measures the call quality, and sends the measured call quality to the exchange-side call quality measuring device 10 (step 750).

Thereafter, the terminal-side call quality measuring apparatus 60 exchanges the call-side quality measuring apparatus 10 through the pre-formed PCM voice signal file (digital voice signal file) pre-recorded by the terminal-side call quality measuring apparatus 60. (Step 760). The exchange side call quality measuring apparatus 10 measures the call quality based on the original algorithm PCM file and the received PCM voice signal file based on the voice algorithm.

If the call quality is normal (step 770), if the call quality is normal, the process proceeds to step 790; otherwise, the process proceeds to step 780 to perform loop back for each section as follows.

The loopback test is similar to the first embodiment described above.

After performing the loop back between the exchange call quality measuring device 10 and section 1, if the voice signal prepared in advance by the exchange call quality measuring device 10 is transmitted, the voice is transmitted through the 1 section by the exchange call quality measuring device 10. The signal comes back. At this time, the returned audio signal is compared with the original audio signal, and if it is not normal, error information is output and the result is stored in the database, and the flow proceeds to step 790.

If the result of the loop-back test between the switch-side call quality measuring device 10 and section 1 is normal, the switch-side call quality measuring device is then used to perform the loop-back test for the second section. When the voice signal prepared in advance at 10 is sent, the voice signal is returned by the exchange-side call quality measuring apparatus 10 through two sections. At this time, comparing the returned voice signal with the original voice signal, if it is not normal, error information is output, and the result is stored in the database of the exchange call quality measuring apparatus 10, and the flow proceeds to step 790.

If the result of the loop-back test between the switch side call quality measuring device 10 and the second section is normal, the loop-back test of the section 3 of the exchange call quality measuring device 10 is next performed. To this end, when the exchange call quality measuring device 10 sends a voice signal prepared in advance, the voice signal is returned through the exchange call quality measuring device 10 through three sections. At this time, the returned audio signal is compared with the original audio signal, and if it is not normal, error information is output and the result is stored in the database.

If the result of the loop-back test between the exchange call quality measuring device 10 and the 3 section is normal, then the voice signal test of the exchange call quality measuring device 10 and the 4 section (Loop-Back Test) In order to transmit the voice signal prepared in advance by the exchange side call quality measuring apparatus 10, the voice signal is returned to the exchange side call quality measuring apparatus 10 through four sections. At this time, the returned audio signal is compared with the original audio signal, and if it is not normal, error information is output and the result is stored in the database.

If the result of the loop-back test between the exchange call quality measuring device 10 and the 4 section is normal, then the voice signal test of the exchange call quality measuring device 10 and the 5 section (Loop-Back Test) In order to transmit the voice signal prepared in advance by the exchange side call quality measuring apparatus 10, the voice signal is returned to the exchange side call quality measuring apparatus 10 through 5 sections. At this time, the returned audio signal is compared with the original audio signal, and if it is not normal, error information is output and the result is stored in the database. In step 790, the currently set call path between the exchange-side call quality measuring device 10 and the terminal-side call quality measuring device 60 is released. Thereafter, the exchange-side call quality measuring apparatus 10 releases the reserved call path based on a predetermined command of the mobile communication network to the mobile communication network (800). The exchange call quality measuring device 10 checks the work progress result to date (Check: 810), and if the test is completed, completes the current work (820), and if there is another work, goes to step 600 in a predetermined procedure. Continue the test.

As described above, the present invention relates to a system and a method for automatically diagnosing and detecting a call failure interval of a mobile communication network, by using a terminal-side call quality measuring device 60 as if a user directly makes a phone call. After making a call through the general telephone subscriber line (11 or 12), a call line of the person prepared in the terminal call quality measuring device (60) is transferred to the switching side call quality measuring device (10). If the call quality is poor, monitor it immediately in real time, send loop-back by section in device 10 (exchange call quality measuring device), and then send the PCM voice signal prepared in exchange call quality device (10). When comparing with the return signal and the voice signal, if it falls below the reference value, the section is judged as the bad section and finds the bad section immediately without human intervention. It has an effect.

Claims (18)

In the system for measuring the call quality of the mobile communication network, A terminal-side call quality measuring device connected to a base station of the mobile communication network to perform a call function, measuring a call quality by comparing a received voice with a pre-stored voice and transmitting a voice for reverse call quality measurement; And, It is connected to the mobile communication switch of the mobile communication network to form a call path with the terminal-side call quality measuring device, and transmits and receives voices by loopback divided into a plurality of stages for each section, and the step-by-step voice transmission and reception of the loopback and the terminal side Exchange side call quality measuring device that measures the call quality by forming a call with the call quality measuring device Bad communication section automatic diagnosis / detection system of a mobile communication network comprising a. The method according to claim 1, The terminal call quality measurement device, The base station to which the terminal side call quality measuring apparatus is connected is connected by wire to each of the sectors which are divided and operated to connect the exchange side call quality measuring apparatus with a call path, and select any one of the sectors to connect the call paths. Auto-diagnosis section of the mobile communication network, characterized in that the automatic diagnosis / detection system. The method according to claim 1, The exchange call quality measurement device, The poor communication interval of the mobile communication network characterized by measuring the call quality for each of the plurality of terminal-side call quality measurement devices and each path is connected to the mobile communication switch connected to the switching side call quality measurement device Automated diagnosis / detection system. The method according to claim 1, The exchange call quality measurement device, The terminal is connected to the call quality measurement device and the Ethernet network to transmit and receive data, And transmits a call quality measured by comparing a voice signal received from the switched call quality measuring device to the terminal-side call quality measuring device to a pre-stored voice signal to the switching-side call quality measuring device through the Ethernet network. Automatic Diagnosis / Detection System for Bad Calls in Mobile Communication Networks. In the system for measuring the call quality of the mobile communication network, An exchange side call quality measuring device connected to a mobile communication exchange of the mobile communication network to perform a call function, measure a call quality by comparing a received voice with a pre-stored voice, and transmit a voice for measuring a handwritten call quality; And, It is connected to the base station of the mobile communication network to form a call path with the switching side call quality measuring device, and transmits and receives voice by loopback divided into a plurality of stages for each section, and the step-by-step voice transmission and reception of the loopback Terminal-side call quality measuring device for measuring call quality by forming a call path with a quality measuring device Bad communication section automatic diagnosis / detection system of a mobile communication network comprising a. The method according to claim 5, The terminal call quality measurement device, The base station to which the terminal side call quality measuring apparatus is connected is connected by wire to each of the sectors which are divided and operated to connect the exchange side call quality measuring apparatus with a call path, and select any one of the sectors to connect the call paths. Auto-diagnosis section of the mobile communication network, characterized in that the automatic diagnosis / detection system. The method according to claim 5, The exchange call quality measurement device, The poor communication interval of the mobile communication network characterized by measuring the call quality by connecting a plurality of wired lines to the mobile communication exchange to which the switching side call quality measuring device is connected to form a plurality of terminal side call quality measuring devices. Automated diagnosis / detection system. The method according to claim 1, The terminal call quality measurement device, It is connected to the exchange call quality measurement device and the Ethernet network to transmit and receive data, And transmits a call quality measured by comparing the voice signal received from the terminal-side call quality measuring device to the switching-side call quality measuring device with a pre-stored voice signal to the terminal-side call quality measuring device through the Ethernet network. Automatic Diagnosis / Detection System for Bad Calls in Mobile Communication Networks. In the method for measuring the call quality of the mobile communication network, A first step of forming a call path between a terminal-side call quality measuring device connected to a base station of the mobile communication network and a switching-side call quality measuring device connected to a mobile communication exchange of the mobile communication network; A second step of measuring call quality between the terminal-side call quality measuring device and the exchange-side call quality measuring device by transmitting and receiving preset voice data through the communication path when the call path is formed; And, A third step of measuring call quality by dividing the mobile communication network into a plurality of loopback sections when an abnormality occurs in call quality by the measurement; Method for automatically diagnosing / detecting a bad call section of a mobile communication network, comprising: a. The method according to claim 9, The first step, Access the base station controller and the mobile communication exchanger on the path to be measured by the switching call quality measurement device and inquire the base station, CEP, SIP, VCH, and TCE information in the base station controller to be measured. Transmits the information according to the inquiry to the terminal-side call quality measurement apparatus using an Ethernet network, And the terminal-side call quality measuring device forms a call path by making a call to the switching-side call quality measuring device based on the received information. The method according to claim 9, The first step, Access the base station controller and the mobile communication exchanger on the path to be measured by the switching call quality measurement device and inquire the base station, CEP, SIP, VCH, and TCE information in the base station controller to be measured. The exchange call quality measuring device makes a call to the terminal call quality measuring device and connects a call path, The exchange-side call quality measuring device transmits the information according to the inquiry to the terminal-side call quality measuring device by using the DTMF signal to the connected communication path, and cuts off the communication path, And the terminal-side call quality measuring device forms a call path by making a call to the switching-side call quality measuring device based on the received information. The method according to any one of claims 9 to 11, Voice is transmitted and received between the terminal-side call quality measuring device and the exchange-side call quality measuring device. Control signal, measured value and information is made through the Ethernet network, or the automatic communication / failure detection method of the communication failure section, characterized in that the transmission using the DTMF to the formed communication path. The method according to claim 9, The second step, By establishing the call path, a predetermined voice is transmitted between the terminal-side call quality measuring device and the exchange-side call quality measuring device, and the received voice is compared with the pre-stored voice to measure the call quality in the forward and reverse directions. A method for automatically diagnosing / detecting a bad call section of a mobile communication network. The method according to claim 9, And a fourth step of determining a defective position based on the forward or reverse defect measured in the second step and the defective section measured in the third step. . The method according to claim 9, The third step, A first section from the switching call quality measuring device to the time switch at the rear end of the mobile communication switch; A second section from the switching side call quality measuring device to the time switch in front of the base station controller; A third section from the switching side call quality measuring device to the vocoder at the rear end of the base station controller; A fourth section from the switched call quality measuring device to the TCE of the base station; And, And a call quality measure by dividing into a fifth section from the exchange call quality measurer to the terminal call quality measurer. The method according to claim 9, The third step, A fifth section from the terminal call quality measuring device to the time switch at the rear end of the mobile communication switch; A fourth section from the terminal call quality measuring device to the time switch in front of the base station controller; A third section from the terminal call quality measuring device to the vocoder at the rear end of the base station controller; A second section from the terminal call quality measuring device to the TCE of the base station; And, A method for automatically diagnosing and detecting a call failure section of a mobile communication network, characterized in that the call quality is measured by dividing the first section from the terminal call quality measuring device to the switching call quality measuring device. The method according to claim 15 or 16, The third step, If the call quality is not normal in the second step, the call quality of the first section is measured, If the call quality is normal as a result of the call quality measurement of the first section, the call quality is measured in the second section, otherwise, the call quality measurement is terminated after storing the corresponding contents. If the call quality is normal as a result of the call quality measurement in the second section, the call quality is measured in the third section, otherwise, the call quality measurement is terminated after storing the corresponding contents. If the call quality is normal as a result of the call quality measurement of the third section, the call quality is measured in the fourth section, otherwise, the call quality measurement is terminated after storing the corresponding contents. And measuring the call quality of the fourth section, storing the corresponding contents, and ending call quality measurement. The method according to claim 9, The voice used to measure the call quality is a pulse-coded signal, characterized in that the poor communication interval automatic diagnosis / detection method of the mobile communication network.