KR20030077762A - Method for analyzing a diagnostic monitor in a mobile network - Google Patents

Abstract

PURPOSE: A method for analyzing speech quality measurement data in a mobile communication network is provided to reduce a time required for analyzing the speech quality measurement data by automatically diagnosing and analyzing the speech quality measurement data through a call process badness case-classified diagnosis algorithm. CONSTITUTION: A speech quality data analyzing unit receives a synchronous channel message, and analyzes a CAI(Common Air Interface) message before and after a call drop(S200). The speech quality data analyzing unit judges whether a PN(Pilot sequence Number) of the synchronous channel message after the call drop is identical to a PN before the call drop(S202). If the PN after the call drop is identical to the PN before the call drop, the speech quality data analyzing unit judges whether a reception power before and after the reception of the synchronous channel message is greater than -86dBm(S204). If the reception power is greater than -85dBm, the speech quality data analyzing unit judges whether an Ec/Io before the call drop is greater than -12dB(S206). The speech quality data analyzing unit judges whether a PMRM(Power Measurement Report Message) before the call drop is repeatedly transmitted(S208). If the PMRM before the call drop is repeatedly transmitted, the speech quality data analyzing unit searches a message generated in two finger POSs with respect to the same PN from search and finger information before the reception of the synchronous channel message, calculates chip delay difference, and judges whether the chip delay difference is over 15 chips(S210). If the chip delay difference is over 15 chips, the speech quality data analyzing unit diagnoses the current state of a mobile communication network, as a call drop state by chip delay(S212), and displays improved measures according to the diagnosis(S214).

Description

METHODS FOR ANALYZING A DIAGNOSTIC MONITOR IN A MOBILE NETWORK}

The present invention relates to a technology for analyzing call quality measurement data in a mobile communication network. In particular, call quality measurement data that can objectively analyze and measure DM (Diagnostic Monitor) data measured through a mobile communication network using an automatic diagnosis function. It relates to an analysis method.

The technology for analyzing call quality measurement data in a general mobile communication network is a method in which an operator (analyzer) directly analyzes and compares the collected data (DM data). Had to judge.

Such analytical techniques not only take a lot of time to analyze a large amount of measurement data, but also lead to the problem of drawing subjective conclusions depending on the ability of the analyst.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the call quality data analysis by automatically diagnosing and analyzing the call quality measurement data through a diagnosis algorithm for each case of poor call processing when analyzing the call quality of the wireless network of the mobile communication network. The purpose of the present invention is to provide a method for analyzing call quality measurement data in a mobile communication network to reduce the time required and to implement a more objective analysis environment.

In order to achieve the above object, the present invention provides a method for analyzing call quality measurement data in a mobile communication network, the method comprising: measuring call quality data for analyzing a call quality analysis between a mobile terminal and a base station provided through a mobile communication terminal; Steps; Automatically diagnosing and analyzing the cause of call drop through a plurality of call processing failure case-by-diagnosis processes of measured call quality data; It provides a call quality measurement data analysis method in a mobile communication network comprising the step of outputting the analysis result in the step as an action method and an improvement method message.

1 is a schematic structural diagram of a mobile communication network for performing a method for analyzing call quality measurement data according to the present invention;

2 is a method for analyzing call quality measurement data in a mobile communication network according to an embodiment of the present invention, which is a flowchart illustrating a call quality measurement data analysis process when a call is disconnected due to chip delay between mother and child stations;

3 is a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, which is a flowchart illustrating a call quality measurement data analysis process when a call is disconnected due to a weak signal;

4 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, which is a process of analyzing call quality measurement data when a call is disconnected due to a missing list of neighboring base stations;

5 is a flowchart illustrating a call quality measurement data analysis method in a mobile communication network according to another embodiment of the present invention, which is a case where a call quality measurement data analysis process is diagnosed when a call is disconnected at an exchange boundary;

6 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, which is a process of analyzing call quality measurement data when a call is disconnected due to a mixed signal;

7 is a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, which is a flowchart illustrating a call quality measurement data analysis process when a call is disconnected due to a forward link failure;

8 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, wherein a call quality measurement data analysis process is performed when a call is disconnected due to a reverse link failure;

<Description of the code | symbol about the principal part of drawing>

100: mobile communication terminal (MS)

101: base station (BTS)

102: base station controller (BSC)

103: mobile communication switch (MSC)

104: base station management device (BSM)

105: call processing DB

106: call quality data measurement unit

107: call quality data analysis unit

108: Analysis DB

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

Prior to the description, the key technical gist of the present invention is to diagnose measurement data by a program through an analysis procedure for each call disconnection based on an algorithm for each case in a mobile communication network. It will be easy to achieve the bar.

1 is a schematic configuration diagram of a mobile communication network for performing a method for analyzing call quality measurement data according to the present invention, which includes a mobile communication terminal (MS) 100, a base station (BTS) 101, and a base station controller (BSC) ( 102, mobile communication exchange (MSC) 103, base station management device (BSM) 104, call processing DB 105, call quality data measurement unit 106, call quality data analysis unit 107 and analysis DB 108.

As shown, reference numeral 100 denotes a mobile communication terminal, and a subscriber can wirelessly connect to a network using the mobile communication terminal 100.

The base station 101 is configured to mediate between the mobile communication terminal 100 and the mobile communication exchange 103 and is composed of one or more transceivers located in predetermined places to perform wireless communication with the mobile communication terminal 100.

The base station controller 102 is a device for controlling the base station 101 to exchange messages between the base station 101 and the mobile communication exchange 103.

The mobile communication switch 103 refers to an automatic system that interfaces user communication from a wireless network to a wired network or a wireless network.

The base station management device 104 manages the base station control device 102 described above, tracks the progress of data call processing, investigates whether the system handles normal calls, and stores them in the call processing DB 105.

The call quality data measurer 106 measures DM data for analyzing the call quality between the mobile communication terminal 100 and the base station 101.

The call quality data analysis unit 107 according to the present invention receives call processing progress information stored in the call processing DB 105 and DM data output from the call quality data measuring unit 106 to measure call quality in a mobile communication network. It analyzes the data and outputs various detailed messages according to the analysis result through the external display means.

The call quality data analysis unit 107 performs an analysis process for each call disconnection case through the analysis DB 108. That is, the analysis DB 108 has a case-by-case call disconnection determination algorithm for automatically diagnosing the call quality measurement data, and according to the DM data input from the call quality data measuring unit 106, appropriate call quality measurement data To carry out the diagnostic process.

Hereinafter, the call quality measurement data diagnosis method in the mobile communication network according to the preferred embodiment of the present invention will be described in more detail with reference to the flowcharts of FIGS. 2 to 8.

Prior to the description of the flowchart, in the process of FIG. 2 to FIG. 8 to be described later, if the condition of the step is not satisfied, all of the second analysis except for the case where the step that can proceed if not satisfied is mentioned It is assumed that the process proceeds.

First, FIG. 2 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to an embodiment of the present invention, which is a case of diagnosing call quality measurement data when a call is disconnected due to chip delay between mother and son.

As shown, the call quality data analysis unit 107 receiving the sync channel message in step S200 analyzes the Common Air Interface (CAI) message before and after call disconnection.

In step S202, it is determined whether or not the PN (Pilot Sequence Number) (finger PN before changing to zero) before the call disconnection is the same in the synchronization channel message immediately after the call disconnection, and if so, proceeds to step S204. Determine whether the Rx power is greater than or equal to -85 dBm from the power information before (after) receiving the sync channel message (generally, before receiving the sync channel message, the Rx power is lower than -90 dBm or less). Gradually improves).

As a result of the determination in step S204, if the Rx power is -85dBm or more, it is determined whether Ec / Io is -12dB or more before the call disconnection, and the flow proceeds to step S208 to obtain a PMRM (Power Measurement Report Message) before the call disconnection. Determine whether to transmit repeatedly.

As a result of the determination in step S208, if the PMRM is repeatedly transmitted before disconnection of the call, the message generated from the two finger POSs for the same PN in the S & F (Searcher and Finger) information before receiving the sync channel message is traced back, and then the chip is The delay difference is calculated to determine if there is a difference of more than 15 chips.

As a result of the determination in step S210, if a difference of 15 chips or more occurs in two finger POS, the call quality data analysis unit 107 proceeds to step S212 and step S214, and the state of the current mobile communication network is set to chip. Diagnose the call disconnection caused by the delay and indicate the countermeasures accordingly.

In this case, the indication of the countermeasure measures means that the mobile communication terminal 100 increases the size of the search window active to simultaneously acquire the mother station signal, or increases the demodulation window length to simultaneously demodulate the mother station signal in the base station channel element. do.

3 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, in the case of diagnosis of call disconnection due to weak signal.

As shown, the call quality data analysis unit 107 receiving the sync channel message in step S300 analyzes the CAI message before and after call disconnection.

In step S302, it is determined whether the PN in the sync channel message is the active PN or the PN in the Extended Neighbor List Update Message (ENLUM) before disconnection. If the condition is satisfied, the process proceeds to step S304.

In step S304, it is determined whether or not the Rx power is weakly received at −90 dBm or less in all power information before and after the synchronization channel message reception, and proceeds to step S306 when received at −90 dBm or less.

In step S306, it is determined whether Ec / Io is -12 dB or less in the finger information before and after the sync channel message, and if it is -12 dB or less, it is determined whether the PMRM is repeatedly transmitted before disconnection (S308).

If the PMRM is repeatedly transmitted before the call disconnection, the process proceeds to steps S310 and S312, and it is diagnosed that the current mobile communication network is in the call disconnection state due to the weak signal, and the improvement measures are displayed accordingly.

In this case, the indication of the countermeasures for improvement may be induced to improve the radio environment by improving the base station output, antenna swing or tilting, or improve the call quality to the local station such as an optical repeater.

FIG. 4 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, in which a call quality measurement data analysis process is performed when a call is disconnected due to a missing list of neighboring base stations.

As shown, the call quality data analysis unit 107 receiving the sync channel message in step S400 analyzes the CAI message before and after call disconnection.

In step S402, it is determined whether the PN in the sync channel message exists in the ENLUM after the handoff that occurred immediately before the call disconnection. If not, the process proceeds to step S404.

In step S404, it is determined whether or not the PMM in the pilot strength measurement message (PSMM) before disconnection includes the PN in the sync channel message, and if it is included, the Ec / Io of the finger PN in the S & F information after the sync channel message is-. It is determined whether more than 12dB (S406).

If the condition of step S406 is satisfied, it is determined whether PMRM before call disconnection is repeatedly transmitted (S408).

As a result of the determination in step S408, if the PMRM before the call disconnection is repeatedly transmitted, the process proceeds to step S410 and step S412 to diagnose that the state of the current mobile communication network is a call disconnection state due to a missing base station list. Indicate the improvement measures accordingly.

At this time, the indication of the improvement countermeasure is used to search for and add a list of missing neighboring base stations by using the remaining size of the search window, to add a list of missing neighboring base stations by using handoff statistics data, or to input details of the neighboring base station list. This can be led to cases such as checking for errors.

5 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, which is a case of diagnosing call quality measurement data when a call is disconnected at an exchange boundary.

As shown, the call quality data analysis unit 107 receiving the sync channel message in step S500 analyzes the CAI message before and after the call disconnection.

In step S502, it is determined whether the network ID of the sync channel message and the network ID in the system variable message before disconnection are different.

If the network ID does not exist while not satisfying the condition of step S502 (S504), it is determined whether a registration message exists within a few seconds, more preferably within 2 seconds after the call disconnection (receiving a sync channel message), and If the conditions of S502 and S506 are satisfied, it is determined whether the PN of the synchronization channel message exists in the neighbor base station list update message NLUM before disconnection (S508).

As a result of the determination in step S508, if the PN exists in the NLUM, the process proceeds to step S510 where the PSMM (keep) is repeated before disconnection of the PN in the synchronization channel message, but the UHDM (Universal Hand-off) of the corresponding ADD command is performed. Direction Message).

If there is no UHDM of the corresponding ADD command, the process proceeds to step S512 to determine whether all the Ec / Io of the PN of the sync channel message before and after the call disconnection are -12 dB or more, and if it is more than -12 dB, the PMRM is repeatedly performed. It is determined whether to transmit (S514).

As a result of the determination in step S514, if the PMRM before call disconnection is repeatedly transmitted, the process proceeds to step S516 and S518, where it is diagnosed that the state of the current mobile communication network is a call disconnection state at the boundary of the exchange, and accordingly Indicate corrective measures.

In this case, when the improvement measures are displayed in the outskirts, the boundary of the mobile communication switch 103 is sufficiently overlapped to increase the signal processing time required for handoff between the mobile communication switch 103 or the base station management device 104 of the base station management device 104. Check if the neighboring base station list details are set to match the boundary of the mobile switching center 103, or if debugging is required at the Inter MSC Soft Hand Off (TAN) router or switching side, or if it occurs repeatedly, the mobile switching center 103 For example, to identify a package associated with a handoff.

FIG. 6 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, in which a call quality measurement data analysis process is performed when a call is disconnected due to a mixed signal (shaded area).

As shown, the call quality data analysis unit 107 receiving the sync channel message in step S600 analyzes the CAI message before and after call disconnection.

In step S602, it is determined whether there are three or more active PNs in the HCM (Hand-off Completion Message) before disconnecting the call (before receiving the synchronous channel message), and if three or more, Ec / Io is -12 dB or less. It is determined (S604).

If the condition of step S604 is satisfied, the process proceeds to step S606 to determine whether Ec / Io of the corresponding PN appearing in the S & F information after the sync channel message is -12 dB or less.

If the condition of step S606 is satisfied, the process proceeds to step S608 to determine whether the PN of the sync channel message exists in the ENLUM. If it exists in the ENLUM, the Rx power is -85 dBm in the power information before receiving the sync channel message. It is determined whether or not it is abnormal (S610).

If it is determined that it is more than -85dBm, it is diagnosed that the current mobile communication network is in a call disconnection state due to mixed signals (S612), otherwise it is diagnosed as a call disconnection due to the absence of the main signal in the weak signal region (S614), and the improvement measures accordingly. It is displayed (S616).

In this case, the indication of improvement measures adjusts the base station coverage by re-adjusting the priority of the neighboring base station list using the handoff statistics data and adjusting the number, or by distributing the signal by adjusting the transmission power and adjusting the main beam direction by antenna swing or tilting. For example, to optimize handoff parameters for local characteristics.

7 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, which is a case of diagnosing call quality measurement due to a call disconnection due to a forward (terminal at a base station) link failure. .

As shown, the call quality data analysis unit 107 receiving the sync channel message in step S700 analyzes the CAI message before and after the call disconnection.

In step S702, it is determined whether the PN of the sync channel message exists in the ENLUM before the call disconnection. If it exists in the ENLUM, the flow advances to step S704 to determine whether the Rx power is less than -90 dBm in all power information before and after the sync channel message. To judge.

If it is determined to be less than -90dBm, it is determined whether the PMRM is repeated before receiving the synchronization channel message (S706), and if the PMRM is repeated, it is determined whether the adjustment value is less than -40dB in the power information before receiving the synchronization channel message (S708). .

If the condition of step S708 is satisfied, it is diagnosed that the state of the current mobile communication network is the call disconnection state due to the reduction of coverage due to the source base station forward link failure (S710), and the improvement measures accordingly are displayed (S718).

Further, if the adjustment value is greater than -40 dB in the power information before receiving the sync channel message and the adjustment value is less than -40 dB in the power information after receiving the sync channel message (S712), the state of the current mobile communication network is caused by a target base station forward link failure. It is diagnosed that the call is disconnected due to the reduced coverage (S714), and the improvement measures accordingly are displayed (S718).

On the other hand, as a result of the determination in step S712, if the adjustment value is more than -40 dB in the power information after receiving the synchronization channel message, it is diagnosed that the state of the current mobile communication network is a call disconnection state due to weak signal (S716), and the improvement accordingly. The countermeasure is displayed (S718).

In addition, although not shown in the figure, if there is no adjustment value after receiving the synchronization channel message, all of the above-described case (S710) (S714) (S716) will be considered.

In this case, the indication of the improvement countermeasure may be induced in a case of checking a base station transmission / reception path mainly on the forward link, or checking a transmission output related variable.

8 is a flowchart illustrating a method for analyzing call quality measurement data in a mobile communication network according to another embodiment of the present invention, which is a process of analyzing call quality measurement data when a call is disconnected due to a reverse link (base station at a terminal). .

As shown, the call quality data analysis unit 107 receiving the sync channel message in step S800 analyzes the CAI message before and after call disconnection.

In step S802, it is determined whether the power information before the call disconnection is greater than or equal to -85 dBm and the adjustment value is greater than +20 dB. If the condition is satisfied, the process proceeds to step S804 before and after the call disconnection. Determine if Io is above -10dB.

As a result of the determination in step S804, if Ec / Io before / after call disconnection is -10 dB or more, the process proceeds to step S806 to determine whether a reverse link message such as PSMM, HCM, etc. of the same message sequence is repeatedly input. At this time, the forward link message such as UHDM and ENLUM is not repeated.

If the reverse link message is repeatedly input as a result of the determination in step S806, the flow advances to step S808 to determine whether the PN is in the same PN or ENLUM even after the synchronization channel message is received. That is, it is determined whether the PN of the sync channel message is the same PN as in the PN or ENLUM before disconnection.

If the condition of step S808 is satisfied, the process proceeds to step S810 and step S812, and it is diagnosed that the state of the current mobile communication network is a call disconnection state due to a reverse link failure, and the improvement measures are displayed accordingly.

At this time, the indication of the countermeasures to confirm whether the base station is affected by external noise, check the base station reverse path, check the base station variables (traffic channel related variables), or hand off This could lead to cases such as identifying access variables.

As mentioned above, although this invention was concretely demonstrated based on the Example, this invention is not limited to this Example, Of course, various changes are possible within the range which does not deviate from the summary.

Therefore, the present invention can significantly reduce the time required for analyzing call quality data by automatically analyzing the call quality failure case-by-case algorithm when analyzing the wireless network call quality of the mobile communication network. In addition, the present invention can perform the measurement data analysis more objectively, it is possible to cultivate the analysis ability of the intermediate level or higher even for beginners due to the systematic and objective analysis according to the analysis algorithm.

Claims (9)

In the call quality measurement data analysis method in a mobile communication network, Measuring call quality data for analyzing a call quality analysis between a mobile communication terminal and a base station provided through a mobile communication terminal; Automatically diagnosing and analyzing the cause of call drop through a plurality of call processing failure case-by-diagnosis processes of the measured call quality data; And outputting the result of the analysis in the step as an action method and an improvement method message. The method of claim 1, The call processing failure case-specific diagnosis process, Diagnosing the cause of call disconnection due to chip delay between mother and child, diagnosing the cause of call disconnection due to weak signal, diagnosing the cause of call disconnection due to missing base station list, and cause of call disconnection at exchange boundary. And diagnosing the cause of the call disconnection due to the mixed signal, diagnosing the cause of the call disconnection due to the forward failure, and diagnosing the cause of the call disconnection due to the backward failure. Call quality measurement data analysis method in a mobile communication network, characterized in that. The method of claim 2, Diagnosing the cause of the call disconnection caused by the chip delay between the mother and child stations, Analyzing a common air interface (CAI) message before and after call disconnection after receiving a synchronization channel message; In the sync channel message immediately after the call disconnection, it is determined whether or not it is the same as the pilot sequence number (PN) before the call disconnection occurs. If the same, the Rx power is equal to the first in the power information before (after) receiving the sync channel message. Determining whether or not a set dBm or more; If the Rx power is greater than or equal to the first set dBm, determining whether Ec / Io is greater than or equal to the first set dB before disconnecting the call and determining whether to repeatedly transmit a PMRM (Power Measurement Report Message) before disconnection; As a result of the determination of the above step, if the PMRM is repeatedly transmitted before disconnection of the call, the message generated from the two finger POS for the same PN in the Searcher and Finger (S & F) information before the sync channel message is found, and then the chip delay difference Determining whether a difference occurs by more than 15 chips; As a result of the determination of the above step, if a difference of more than 15 chips in the two finger POS, the step of diagnosing the state of the mobile communication network call disconnection due to the chip delay, characterized in that it comprises the step of displaying the improvement measures accordingly Method of analyzing call quality measurement data in mobile communication network. The method of claim 2, Diagnosing the cause of the call disconnection due to the weak signal, Analyzing the CAI message before and after call disconnection after receiving the synchronization channel message; Determining whether the PN in the sync channel message is an active PN or a PN in an Extended Neighbor List Update Message (ENLUM) before disconnection; Determining whether the Rx power is received below a second set dBm in all power information before and after receiving the synchronization channel message if the condition of the step is satisfied; If it is received below the second set dBm, it is determined whether the Ec / Io is below the first set dB from the finger information before / after the sync channel message, and if it is below the first set dB, whether the PMRM is repeatedly transmitted before the call is disconnected. Judging; Repeatedly transmitting the PMRM before the call disconnection, diagnosing that the state of the mobile communication network is in the call disconnection state due to weak signal, and displaying the improvement measures accordingly, the call quality measurement in the mobile communication network Data analysis method. The method of claim 2, Diagnosing the cause of the call disconnection due to the missed base station list, Analyzing the CAI message before and after call disconnection after receiving the synchronization channel message; Determining whether the PN in the sync channel message is in an ENLUM after a handoff that occurred immediately before a call disconnection; Determining whether the PN in the sync channel message is included in a pilot strength measurement message (PSMM) before disconnection if the condition is not satisfied; Determining whether the Ec / Io of the finger PN is equal to or greater than a first set dB in the S & F information after the synchronization channel message if the condition of the step is satisfied; If the condition of the above step is satisfied, it is determined whether the PMRM before the call disconnection is repeatedly transmitted, and if the PMRM before the call disconnection is repeatedly transmitted, the mobile communication network is diagnosed as being in the call disconnection state due to a missing base station list. And displaying the improvement countermeasure according to the call quality measurement data analysis method in the mobile communication network. The method of claim 2, Diagnosing the cause of the call drop at the exchange boundary, Analyzing the CAI message before and after call disconnection after receiving the synchronization channel message; It is determined whether the network ID of the sync channel message is different from the network ID in the system variable message before disconnection. If the network ID does not exist without being different, it is determined whether a registration message exists within a preset time after disconnection. Making a step; If the network IDs are different and the registration message exists, determining whether the PN of the sync channel message is in the NLUM before the call disconnection; As a result of the determination of the step, if the PN is present in the NLUM, repeating the PSMM before the call disconnection for the PN in the sync channel message, but determining whether there is a Universal Hand-off Direction Message (UHDM) of the corresponding ADD command Wow; If there is no UHDM of the ADD command, it is determined whether all the Ec / Io of the PN of the sync channel message before / after the call disconnection are greater than or equal to the first set dB. Determining whether to transmit; As a result of the determination of the step, if the PMRM before the call disconnection is repeatedly transmitted, the mobile communication network comprises diagnosing that the state of the mobile communication network is in the call disconnection state at the exchange boundary, and displaying the corresponding countermeasure. Method of analyzing call quality measurement data. The method of claim 2, Diagnosing the cause of the call disconnection due to the mixed signal, Analyzing the CAI message before and after call disconnection after receiving the synchronization channel message; Determining whether there are three or more active PNs in the HCM (Hand-off Completion Message) before receiving the synchronization channel message, and if three or more, determining whether Ec / Io is less than or equal to the first set dB; Determining whether the Ec / Io of the corresponding PN in the S & F information following the sync channel message is less than or equal to the first set dB when the condition of the step is satisfied; Determining whether the PN of the sync channel message exists in ENLUM when the condition of the step is satisfied; and determining whether the Rx power is greater than or equal to the first set dBm in power information before receiving the sync channel message if the PN of the sync channel message exists in ENLUM. Wow; If it is determined that the first set dBm or more, the state of the mobile communication network is diagnosed as a call disconnection state due to signal congestion, otherwise it is diagnosed as a call disconnection due to the absence of a main signal in a weak signal region, and the corresponding improvement measures are displayed. Call quality measurement data analysis method in a mobile communication network, characterized in that consisting of steps. The method of claim 2, Diagnosing the cause of the call disconnection due to the forward failure, Analyzing the CAI message before and after call disconnection after receiving the synchronization channel message; It is determined whether the PN of the sync channel message exists in the ENLUM before the call disconnection. If it exists in the ENLUM, it is determined whether the Rx power is less than or equal to the second set dBm in all the power information before and after the sync channel message. If it is determined that the second set dBm or less, it is determined whether the PMRM is repeated before receiving the sync channel message, and if the PMRM is repeated, it is determined whether the adjustment value is less than the second set dB in the power information before receiving the sync channel message. Making a step; If the condition of the step is satisfied, diagnosing that the state of the mobile communication network is a call disconnection state due to reduction of coverage due to a source base station forward link failure, and displaying an improvement measure accordingly; If the adjusted value is greater than or equal to the second set dB in power information before receiving the sync channel message, and the adjusted value is less than or equal to the second set dB in power information after receiving the sync channel message, the state of the mobile communication network is a target base station forward link. Diagnosing a call disconnection state due to coverage reduction due to a failure, and displaying an improvement measure accordingly; Diagnosing that the state of the mobile communication network is a call disconnection state due to a weak signal when the adjustment value in the power information after receiving the synchronization channel message is greater than the second set dB, and displaying an improvement measure accordingly. Call quality measurement data analysis method in a mobile communication network. The method of claim 2, Diagnosing the cause of the call disconnection due to the backward failure, Analyzing the CAI message before and after call disconnection after receiving the synchronization channel message; In the power information before the call disconnection, it is determined whether the Rx power is greater than or equal to the first setting dBm and the adjustment value is greater than or equal to the third setting dB. Judge. Determining whether the reverse link message such as PSMM, HCM, etc. of the same message sequence is repeatedly input if Ec / Io before / after call disconnection is equal to or greater than the fourth set dB; If the reverse link message is repeatedly input, determining whether the PN is in the same PN or ENLUM after receiving the synchronization channel message; If the condition of the above step is satisfied, the mobile communication network is diagnosed as being in a call disconnection state due to a reverse link failure, and the improvement measures according to the call quality measurement data analysis are performed. Way.