KR20080108780A - Apparatus and method for analyzing cause of dropped call and setup fail call in mobile communication network - Google Patents

Abstract

An apparatus for analyzing a cause when call disconnect and call setup fail in a handoff process and communication between a base station and a mobile terminal are provided to analyze wireless environment and wireless state without an understand procedure. A measuring unit(110) measures a wireless environment. An abnormal determining unit(120) determines whether to fail call connection and call setup. An analyzing unit(130) analyzes a cause of abnormal call generation by using a wireless environment parameter through a measuring unit and a common wireless interface message. A cause displaying unit(140) classifies a cause according to the result of the analyzing unit by the corresponding abnormal call.

Description

Apparatus and method for analyzing cause of dropped call and setup fail call in mobile communication network}

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a view showing the configuration of a call cutting and call setup failure analysis device according to an embodiment of the present invention.

2 is a flowchart illustrating a procedure of a method for analyzing cause of call disconnection and call establishment failure according to an embodiment of the present invention.

3 is a flowchart illustrating a procedure of alarming warnings during wireless environment measurement in a method for analyzing the cause of call disconnection and call setup failure according to an embodiment of the present invention.

4 and 5 are flowcharts illustrating an algorithm for analyzing causes in a method for analyzing cause of call disconnection and call setup failure according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

110: measurement module 120: abnormal call discrimination module

130: analysis module 140: output module

The present invention relates to a wireless environment analysis between a base station and a terminal in a wireless mobile communication network environment. More particularly, the present invention relates to an apparatus and method for analyzing a cause of call disconnection and call establishment failure during a communication or handoff process between a base station and a terminal. It is about.

In general, call quality of a network environment such as a mobile communication network, a personal mobile communication network, a wireless data network, a public communication network, and a next-generation mobile communication network (eg, IMT-2000) is changed according to the movement of the mobile communication terminal and the load of a base station. That is, when subscribers are gathered to a specific base station, call quality is degraded due to channel interference, and the service radius of the base station is reduced. As a result, the mobile communication terminal which is busy at the base station boundary point performs a handoff to the neighboring base station or the call is disconnected. As such, when a call is frequently disconnected, a subscriber's dissatisfaction occurs and a mobile communication service cannot be provided smoothly.

Conventionally, when problems such as call disconnection and call setup failure due to poor call quality occur in a specific area, take the network measurement equipment in the area and analyze the power level received from the base station of the mobile communication terminal to analyze the cause of the problem. Or, a test call was generated from the network measuring equipment to analyze the cause of the problem.

In addition, each mobile network operator is moving several areas in advance before problems such as call disconnection, measuring the wireless environment with the measuring equipment to prevent problems in advance and to optimize the radio for more stable call quality.

As described above, a method of measuring a network environment in a specific region and analyzing and measuring the measured data directly by an engineer has been used to identify a problem and a cause. However, direct analysis and judgment by these engineers took time to solve simple problems. In addition, when engineers face a wider variety of problems, significant trial and error occurs in determining the cause and solving the problem, and it is very difficult to find the exact cause of the performance degradation. In particular, engineers or engineers who are inexperienced in wireless optimization can experience greater difficulties and cause greater problems such as analysis errors and delays. If the cause analysis of the call is delayed due to such a problem, the disconnection phenomenon is neglected, causing inconveniences of subscribers to the mobile service and a decrease in call quality. have.

The present invention was devised to solve the above problems, and provides an apparatus and method for measuring a wireless environment with a base station in a wireless mobile communication network and using the data to analyze a wireless state and identify a cause when an abnormal call occurs. Its purpose is to.

In addition, it is another purpose to automatically inform the operator of the environment in which abnormal calls can occur during wireless environment measurement.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the appended claims.

In order to achieve the above object, the call disconnection and call establishment failure cause analysis apparatus according to the present invention measures a radio environment in a wireless mobile communication network environment and analyzes a call disconnection by analyzing a common air interface (CAI) message. And an apparatus for analyzing a cause of a setting failure, the apparatus comprising: measuring means for measuring a wireless environment; Abnormal call discrimination means for discriminating whether call disconnection and call setup have failed; The radio environment parameter and the CAI message measured through the measuring means are input, and the power measurement report message (PMRM) and the block error rate (BLER) information (Info) are received from the radio environment parameter and the CAI message. Extracts the message and determines whether the pilot signal has changed the signal-to-noise ratio (Ec / Io) value or the signal transmit / receive strength (Tx / Rx-Power) or mobile network code (MNC). Analysis means for analyzing the; And cause information display means for classifying the cause matters according to the results of the analysis means by the abnormal number.

According to another aspect of the present invention, a method for measuring a wireless environment in a wireless mobile communication network environment and analyzing the cause of call disconnection and establishment failure by analyzing a CAI (Common Air Interface) message, comprising: (a) measuring a wireless environment step; (b) determining whether call disconnection and call establishment failed; (c) receiving measured radio environment parameters and CAI message, extracting PMRM (Power Measurement Report Message) and BLER (Block Error Rate) Info message from this radio environment parameter and CAI message, Ec / Io value of pilot signal Or determining whether the signal transmission / reception strength (Tx / Rx-Power) or MNC (Mobile Network Code) is changed to analyze the cause of the corresponding call disconnection and call establishment failure; And (d) classifying the cause matters according to the analysis result for each call cut and call setup failure.

According to another aspect of the present invention, a recording medium recording a program for measuring the radio environment in the wireless mobile communication network environment and analyzing the cause of call disconnection and setup by analyzing the CAI (Common Air Interface) message, Procedure for determining call disconnection and call establishment failure, receiving measured radio environment parameters and CAI messages, and receiving PMRM (Power Measurement Report Message) and BLER (Block Error Rate) from these radio environment parameters and CAI messages. ) Extract the Info message to determine whether the pilot signal has changed the Ec / Io value or the signal transmission / reception strength (Tx / Rx-Power) or MNC (Mobile Network Code) to analyze the cause of the call disconnection and call establishment failure. Reads the program that executes the program to execute the procedure of displaying and distinguishing the cause by the corresponding call cut and call setup failure. Possible recording media are provided.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a view showing the configuration of a call cutting and call setup failure analysis device according to an embodiment of the present invention.

Referring to Figure 1, call cutting and call setup cause analysis apparatus 100 of the present invention is a measurement module 110 for measuring the wireless environment of the current position, an abnormal call determination module for determining abnormal calls, such as call disconnection and call setup failure 120, an analysis module 130 for analyzing the cause of the abnormal call and an output module 140 for displaying the cause and measures of the analyzed abnormal call.

The measurement module 110 measures a wireless environment such as a wireless environment parameter and a common air interface (CAI) message at a current location through a measuring instrument such as a wireless environment measuring device. Here, CAI stands for Common Air Interface and is a set of open standards that refer to the physical and logical characteristics linked between the base station and the mobile terminal. That is, CAI is an interface protocol for wireless communication, and is a standard standard for common wireless connection conditions such as frequency, communication method, and connection method between voice and non-voice mobile communication terminals and base stations. In addition, the measurement module 110 is provided with an alarm unit 112 for notifying the corresponding information as a warning when the conditions of the wireless environment set in advance during the wireless environment measurement. In addition, a detailed description of the alarm condition algorithm of the alarm unit 112 will be described later.

The abnormal call determination module 120 determines a failure call or abnormal call, such as call disconnection and call setup failure. That is, when an abnormal call occurs, it is recognized and it is determined whether the generated abnormal call is a call break or a call setup failure, and this information is provided to the analysis module 130 to be described later.

The analysis module 130 analyzes the cause of the abnormal call occurrence based on the measured information. The analysis module 130 may include a data input unit 132 that receives data provided through the measurement module 110, a message extractor 134 that extracts a message to be used for cause analysis from the data input unit 132, and the extracted data. The cause analyzer 136 analyzes the cause of the call disconnection and call establishment failure by analyzing the message.

The data input unit 132 receives a radio environment parameter and CAI message data measured and provided by the measurement module 110. In this case, whenever data to be used for analysis is required, the measurement module 110 may receive the measured data and receive the measured data, or may continuously receive the measured data.

The message extractor 134 extracts a message and information used for analysis from data received by the data input unit 132. The messages used for the analysis include a power measurement report message (PMRM) and a block error rate (BLER) information (Info) message. The messages used for the analysis include radio environment information with the base station, radio state information, and information at the time of handoff between the mobile communication terminal and the base station, and are transmitted / received through the WCDMA radio channel or the CDMA traffic channel. In addition, the PMRM includes frame information and error detection information, and the WCDMA BLER Info message includes Chan [0] and Chan [1], where Chan [0] is a Dedicated Physical Control Channel (DPCCH) and Chan [1]. Is defined as a dedicated physical data channel (DPDCH). In addition, through the radio environment parameters and the extracted messages, such as whether the signal-to-noise ratio (Ec / Io) value of the pilot signal, the signal transmission / reception strength (Tx / Rx-Power), or the mobile network code (MNC) are changed. Information can be obtained. Here, the Ec / Io value of the pilot signal is an abbreviation of the Energy per Chip over the Interface noise value and refers to the ratio of the pilot power per chip received from the mobile station to all the signal power received in the band, Used to judge good / bad.

The cause analyzer 136 analyzes the cause of the abnormal call based on the message extracted through the message extractor 134 and the obtained information. The cause analysis unit 136 analyzes the cause according to the call cutting and call setting failure state determined by the abnormal call determination module 120, and for this purpose, the call setting failure cause analysis unit 137 and the call cutting cause analysis The unit 138 is divided. A detailed algorithm for analyzing the cause of the abnormal call occurrence in the cause analyzing unit 137 will be described later.

The output module 140 serves to display the analyzed cause information and warning alarm to the operator. The output module 140 causes the cause information display unit 142 to output cause information of an abnormal call occurrence analyzed by the analysis module 130, an alarm display unit 144 and an abnormal call output alarm information from the measurement module 110. And a measure display unit 146 for outputting the measure according to the occurrence.

The cause display unit 142 serves to provide the operator with the cause of the abnormal call through the display means such as an LCD monitor or a printer. When displaying the result according to the cause analysis in the cause information display unit 142, it may be divided into the cause of the call setup failure and the cause of the call cutting.

The alarm display unit 144 serves to immediately provide the operator with the corresponding information when an alarm occurs in the alarm unit 112 of the measurement module 110. For example, the alert information is displayed through a pop-up window on the monitor screen.

The action display unit 146 stores the corresponding action in advance according to the cause of the abnormal call, and when the cause is displayed, the corresponding action information is retrieved from the stored action and provided to the operator. do. The above-mentioned measures may be stored as texts, for example, to solve a problem caused by the cause of call disconnection and call setup failure. In addition, the indication of these measures is for the operator to identify the cause of the call disconnection and call setup failure and to provide the corresponding measures so that the problem can be solved quickly and easily.

2 is a flowchart illustrating a procedure of a method for analyzing cause of call disconnection and call establishment failure according to an embodiment of the present invention.

Referring to Figure 2, the call cutting and call setup failure cause analysis method of the present invention, first measuring the radio environment at the current location through the measurement equipment or measurement equipment. The radio environment is measured and the radio environment parameters and the CAI message are acquired.

It is checked whether a failure call or an abnormal call occurs during the measurement of the radio environment, and when the abnormal call or the failure call occurs, it is determined whether the corresponding abnormal call is a call disconnection or a call setup failure.

If an abnormal call occurs, a procedure of receiving radio environment parameters and CAI message data acquired at the time of radio environment measurement into the analysis device is performed for cause analysis.

Process of extracting message and parameter information to be used for analyzing cause of abnormal call from data such as input radio environment parameter and CAI message. The extracted message or information includes PMRM (Power Measurement Report Message) and BLER (Block Error Rate) Info message, pilot signal Ec / Io value or signal transmission / reception strength (Tx / Rx-Power) or MNC ( Mobile Network Code) may be changed or not (S40).

Based on the extracted message and parameter information, the cause of the abnormal call is analyzed by substituting the cause analysis algorithm. At this time, the abnormal call is classified into a call truncation and a call setup failure determined in the abnormal call determination step, and the cause is analyzed. At this time, a detailed algorithm for analyzing the cause will be described in detail below (S50).

If the cause is analyzed by each abnormality in the cause analysis step, the procedure for outputting the cause of the abnormality is provided to the operator. In this case, it is preferable to output the text or graphic so that the operator can easily identify the cause of the call cut and call setup failure.

In addition, the procedure for searching for the pre-stored measures corresponding to the cause with the cause outputted (S70).

Next, if a measure corresponding to the cause is found, the procedure for outputting it is provided to the operator. Through this, the operator can easily know the cause of the occurrence of abnormal call and the measures to cope with it, and thus, it is possible to promptly deal with the occurrence of the problem.

Hereinafter, a procedure for notifying a problem occurrence warning during wireless environment measurement will be described with reference to FIG. 3.

3 is a flowchart illustrating a procedure of alarming warnings during wireless environment measurement in a method for analyzing the cause of call disconnection and call setup failure according to an embodiment of the present invention.

Referring to FIG. 3, first, an alarm condition is set by an operator. The alarm condition is a condition when the wireless environment is deteriorated or a non-ideal state, and sets a corresponding condition so as to be warned in advance of an abnormal state of the wireless environment.

Next, the wireless environment of the current location is continuously measured. (S12)

A search procedure for comparing the radio environment information measured together with the radio environment measurement and a preset alarm condition is performed.

Next, a process of determining whether a condition is matched during the search is performed. That is, if a matching condition is not found among the plurality of alarm conditions, the radio environment measurement of the step S12 is continued and if a matching condition is found, the process proceeds to the next step.

If a condition that matches the alarm condition is found, an output procedure is performed to immediately notify the operator of the warning message according to the condition. The warning message may be stored when an alarm condition is set, and the corresponding wireless environment deterioration state or non-error state is stored as text corresponding to each alarm condition. In addition, in order to immediately inform the operator of the corresponding warning, information may be delivered through a pop-up window or via SMS.

Hereinafter, a detailed algorithm for analyzing the cause of call disconnection and call setup failure in step S50 and an algorithm of an alarm condition will be described with reference to FIGS. 4 and 5.

4 and 5 are flowcharts illustrating an algorithm for analyzing causes in a method for analyzing cause of call disconnection and call setup failure according to an embodiment of the present invention.

First, referring to FIG. 4, the abnormal call determination module 120 of the call cutting and call setup failure cause analysis apparatus 100 of the present invention recognizes an abnormal call occurrence and determines that the abnormal call is a call setup failure. In this case, the cause analyzing unit 137 analyzes the cause of the call setup failure.

If it is determined that the call setup failure is an abnormal call, it is determined whether the MNC (Mobile Network Code) has been changed even once since the start of the call. If there has been a change, the cause of the call establishment failure is found to be due to the transition of the operator network. Here, the MNC is a unique code of the provider network. In addition, if the cause is found to be due to the operator network transition, it can be recognized that the measurement terminal falls out of the right to call and has transitioned to another provider network, and may provide the same to the operator. (20, 21)

Second, if there is a signal of more than -10dB of Detected Dominant Ec / Io detected during call setup after call initiation, it is determined that the cause of the call setup failure is due to missing neighbors (30, 31).

Third, if a signal with a monitored Dominant Ec / Io of more than -8 dB after the call initiation is found, the cause of the call establishment failure is determined to be due to an access handover failure. The access handover failure is a call that the good target signal handover should proceed while the UE accesses the call, but fails. In this case, the operator may notice that the reselection or handover has been delayed by another problem, and may provide the same to the operator (40, 41).

Fourth, if the active Dominant Ec / Io (Active Dominant Ec / Io) is below -12dB and the Rx-Power is above -103dBm after call initiation, the cause of the call setup failure may be attributed to the Dominant pilot member. It turns out to be due. This may be perceived by the operator as a failure call in the pilot pollution area or by a lack of good signal and may provide the operator with such a statement. (50, 60, 51)

Fifth, the Detective Dominant Ec / Io and Monitored Dominant Ec / Io values are below -10dB or the terminal does not detect the value after the call is started, and the Active Dominant Ec / Io values are below -12dB and Rx-Power If is less than -103 dBm, the cause of the call setup failure is found to be due to the serving pilot member. This can be perceived as a failure to establish a call in a shaded or bad area and may provide the operator with this. In addition, the reference of Ec / Io -12dB is generally based on the time when the downlink BLER rises. (50, 60, 61)

Sixth, if the Active Dominant Ec / Io is greater than -10dB since the call is started, Chan [0] crc_rec is greater than '0' and the crc_rec and crc_error values of Chan [0] are the same, the cause of the call setup failure is determined. It turns out to be a problem of the hardware equipment of the upper core network system. This allows the operator to recognize that the call setup has failed due to a significant increase in the BLER despite the good Ec / Io that can defecate the downlink status, and may provide the operator with such an issue. In this case, information to check the hardware of the channel card of the base station or the PLD module of the repeater may be provided. Chan [0] is a channel for controlling a dedicated physical data channel (DPDCH) with a dedicated physical control channel (DPCCH).

Seventh, the Active Dominant Received Signal Code Power (RSCP) of the pilot signal after the call start corresponds to the cell edge at -115 dBm, and the Acquisition Indicator Channel (AICH). When Stat is '0' and the transmit power (Tx-Power) of the terminal is +23 dBm or more, it is determined that the cause of the call setup failure is due to the lack of coverage of the Up Link. As a result, the operator can recognize the link imbalance which lacks the uplink coverage compared to the downlink coverage, and can provide the operator with the same. In addition, as a measure according to the result, it is possible to recognize that there is a problem in the uplink part and to provide information for adjusting the uplink gain of the repeater or checking the RSSI status of the base station Node B. Here, 'AICH Stat = 0' means that the AICH No Ack state does not recognize when the UE transmits a preamble for call setup, and there is no response from the upper system. (80, 90, 91)

In addition, when all of the above-described cause analysis algorithms do not correspond, it is found that the cause of the call setup failure is unknown. It can be recognized that call setup failure occurs even though the overall wireless environment is very good, and provides action information that allows the operator to examine whether the called party was busy or a problem on the upper system during the measurement process. (81)

Next, referring to FIG. 5, the abnormal call determination module 120 of the call cutting and call setting failure cause analysis apparatus 100 according to the present invention recognizes an abnormal call occurrence and determines that the abnormal call is a call break. In this case, the cause analyzing unit 137 analyzes the cause of the call cutting.

If it is determined that the call is abnormal, the received signal strength (Rx-Power) of the pilot signal is at least -90 dB for a predetermined time before the call disconnection point (for example, 8 seconds before 8 seconds before the call disconnection point). If the transmission strength (Tx-Power) of the terminal is 20dB or more, it is determined that the cause of call disconnection is due to lack of coverage of the uplink. This allows the operator to recognize that the uplink is in poor condition and to provide the operator with the same. Actions may also provide information to check base stations and repeater uplinks. (25, 35, 95)

Second, the Active Dominant Ec / Io of the pilot signal is -10 dB or more for a predetermined time before the call disconnection time, and the activated Dominant Primary Synchronization Code (PSC) and the detected Dominant Main Motor Code (Detected) If the Dominant PSC) does not match, it is determined that the cause of the call truncation is due to missing Naver list (45, 46).

Third, if the Active Dominant Ec / Io of the pilot signal is less than -12 dB for a predetermined time before the call disconnection time, it is determined that the cause of the call disconnection is due to the lack of a pilot pilot signal that predominates. This allows the operator to recognize the area as a pilot pollution area or an area with no good signal and may provide such information to the operator (55, 56).

Fourth, if the Active Dominant Received Signal Code Power (RSCP) of the pilot signal is less than -115 dBm for a predetermined time before the call disconnection time, the cause of the call disconnection is found to be caused by the serving pilot member. At this point, the operator may perceive the level as if it is about to leave the currency right now and may provide such information to the operator. (65,66)

Fifth, the active dominant Ec / Io of the pilot signal is -10 dB or more, and the crc_rec and crc_error of Chan [0] and Chan [1] are greater than or equal to '0' for a predetermined time before the call disconnection point, and Chan [0] Or, if crc_rec and crc_error of Chan [1] are the same value, it is determined that the cause of call truncation is a problem of the hardware equipment of the base station and its higher core network system. (75, 76)

In addition, it does not correspond to all of the above-described cause analysis algorithms, and when the signal reception strength (Tx-Power) of the terminal is less than 23 dB, it is found that the cause of the call setup failure is unknown. It can be recognized that call cutting occurs even though the overall wireless environment is very good, and it can provide information on the actions that allow the operator to examine whether the called party was busy or a problem on the upper system during the measurement process. Can be (85,86)

Next, the algorithm of the alarm condition in the measurement module 110 will be described.

First, when the MNC is changed when measuring the radio environment in the measurement module 110 of the call cutting and call setup failure cause analysis apparatus 100 of the present invention, the operator is informed of the information that the network has changed.

Secondly, if the signal reception strength (Rx-Power) is less than -90dB or the transmission strength (Tx-Power) of the terminal is more than 20dBm during the radio environment measurement, the UP Link abnormal information is notified.

Thirdly, if the Detected Dominant Ec / Io of the pilot signal is less than -10dB during the radio environment measurement, it informs the neighbor list abnormal information. This allows the operator to immediately recognize and take action on the site whether the neighbor list is missing or a priority issue.

Fourth, if the Active Dominant Received Signal Code Power (RSCP) of the pilot signal is -115 dBm or less during radio environment measurement, the serving pilot abnormal information is notified. Thus, the operator can immediately recognize that the current terminal has entered the coverage boundary point.

As such, the alarm function does not allow the operator to continuously monitor during wireless quality measurement, and thus sets a predetermined wireless environment condition and notifies the user in real time when the condition is satisfied. This is to prevent the occurrence of a phenomenon such as call disconnection or call setup failure at the measurement point, but it is possible to prevent such occurrence at the cell boundary or surrounding area of the network.

The method of the present invention as described above may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

According to the present invention, by assigning the measured data at the time of call disconnection and call setup failure when measuring the radio environment into the analysis algorithm, the cause of call disconnection and call setup failure is identified and provided, so that it is easy without the difficult analysis and understanding process of the engineer. It provides the effect that can analyze the wireless environment and the wireless state.

In addition, by immediately alerting the operator to a poor radio condition in which an abnormal call can occur during wireless environment measurement, it provides the effect that the operator can recognize and cope with the problem situation as soon as possible.

Claims (43)

In the wireless mobile communication network environment, it measures the wireless environment and analyzes the common wireless interface message to analyze the cause of call disconnection and setup failure. Measuring means for measuring a wireless environment; Abnormal call discrimination means for discriminating whether call disconnection and call setup have failed; Analyzing means for analyzing a cause of an abnormal call using a wireless environment parameter and a common wireless interface message measured by the measuring means; And Call cause and call setup failure cause analysis apparatus comprising a; cause information display means for classifying the cause matters according to the results of the analysis means by the abnormal number. The method of claim 1, wherein the analysis means, Extracting means for receiving a radio environment parameter and a common radio interface message and extracting a power measurement message and a block error rate information message from the radio environment parameter and the common radio interface message; And And determining means for determining a change in the pilot signal through the message extracted by the extracting means. The method of claim 2, wherein the determining means, Call disconnection and call setup failure cause analysis device characterized in that it is determined by using the signal-to-noise ratio of the pilot signal, the transmission and reception strength, or whether the mobile network code changes. The method according to any one of claims 1 to 3, wherein the analysis means, Call setup failure cause analysis means for analyzing a cause of call setup failure when it is determined in the abnormal call determination means as call setup failure; And And call cutting cause analyzing means for analyzing the cause of the call cutting when the abnormal call determining means determines that the call is cut. The method of claim 4, wherein the call setup failure cause analysis means, Analysis of the mobile network code has changed since the start of the call, if there has been a change, call disconnection and call setup failure cause analysis device comprising the first analysis means for determining the cause of the call set-up failure as the network transition . The method of claim 4, wherein the call setup failure cause analysis means, And a second analysis means for analyzing whether the detected predominant signal-to-noise ratio value of the pilot signal has been greater than or equal to the reference value at the time of call establishment after call initiation, and determining the cause of the call setup failure as a missing neighbor if it has been greater than or equal to the reference value. Call cutting and call setup failure cause analysis device, characterized in that. The method of claim 4, wherein the call setup failure cause analysis means, A third analysis means for determining the cause of the call establishment failure as an access handover failure when the observed predominant signal-to-noise ratio value of the pilot signal after the call initiation is greater than or equal to the reference value; Device. The method of claim 4, wherein the call setup failure cause analysis means, And a fourth analysis means for determining the cause of the call setup failure as the predominant pilot signal if the activated predominant signal-to-noise ratio value of the pilot signal after the call is less than or equal to the reference value and the signal reception strength is greater than or equal to the reference value. Device for analyzing the cause of a call cut and call setup failure. The method of claim 4, wherein the call setup failure cause analysis means, The active dominant signal-to-noise ratio of the pilot signal since the start of the call, the monitored dominant signal-to-noise ratio value is below the reference value, or the dominant signal-to-noise ratio value activated without the terminal being aware of the value is below the reference value, and the signal reception strength is the reference value. And a fifth analysis means for determining the cause of the call setup failure as the serving pilot member if it is less than the value. The method of claim 4, wherein the call setup failure cause analysis means, If the activated predominant hand signal code strength value of the pilot signal after the call start corresponds to the cell boundary value, there is no response from the upper system in the acquisition indication channel, and the transmission strength of the terminal is higher than the reference value, the cause of the call establishment failure is determined. And a sixth analyzing means for determining that coverage is insufficient. The method of claim 4, wherein the call setup failure cause analysis means, If the active dominant signal-to-noise ratio value of the pilot signal after the call start is greater than or equal to the reference value, and the block error rate of the block error rate information message is greater than or equal to the reference value, determine the cause of the call establishment failure as a problem with the hardware equipment of the base station and the higher core network system. Call break and call setup failure cause analysis apparatus characterized in that it comprises a seventh analysis means. The method of claim 4, wherein the call cutting cause analysis means, And eighth analysis means for determining the cause of the call disconnection due to the lack of coverage of the upper link when the reception strength of the pilot signal is greater than or equal to the reference value and the transmission strength of the terminal is greater than or equal to the reference value for a predetermined time before the call disconnection. Device for analyzing the cause of a call cut and call setup failure. The method of claim 4, wherein the call cutting cause analysis means, If the activated dominant signal-to-noise ratio value of the pilot signal is greater than or equal to the reference value and the activated dominant main motor code and the detected dominant main motor code do not coincide for a predetermined time before the call truncation time, the cause of the call truncation is determined as missing the neighbor list. And a ninth analyzing means. The method of claim 4, wherein the call cutting cause analysis means, And a tenth analyzing means for determining the cause of the call truncation as the predominant pilot signal if the activated predominant signal-to-noise ratio value of the pilot signal is less than or equal to the reference value for a predetermined time before the call truncation time. Cause Analysis Device. The method of claim 4, wherein the call cutting cause analysis means, And an eleventh analyzing means for determining the cause of the call cutting as the serving pilot member when the activated predominant hand signal code strength value of the pilot signal is less than or equal to the reference value for a predetermined time before the call cutting time. Cause Analysis Device. The method of claim 4, wherein the call cutting cause analysis means, If the active dominant signal-to-noise ratio value of the pilot signal is greater than or equal to the reference value and the block error rate of the block error rate information message is greater than or equal to the reference value, the cause of the call disconnection may be determined by the hardware equipment of the base station and the higher core network system. And a twelfth analysis means for discriminating as a problem. The measuring unit according to any one of claims 1 to 3, wherein And an alarm means for notifying a predetermined signal to noise ratio, a signal transmission / reception strength, or a mobile network code change condition during a radio environment measurement. The method of claim 17, wherein the alarm means, And a first alarm means for informing the operator that the operator's network has been changed when the mobile network code is changed during the wireless environment measurement. The method of claim 17, wherein the alarm means, Analysis of the cause of call disconnection and call establishment failure, comprising a second alarm means for notifying higher link error information when the signal reception strength is lower than the reference value or the transmission strength of the terminal is higher than the reference value during radio environment measurement. Device. The method of claim 17, wherein the alarm means, And a third alarm means for notifying the neighbor list abnormality information when the detected predominant signal-to-noise ratio value of the pilot signal during the radio environment measurement is less than or equal to the reference value. The method of claim 17, wherein the alarm means, And a fourth alarm means for notifying the serving pilot abnormal information when the activated predominant hand signal code strength value of the pilot signal during the radio environment measurement is less than or equal to the reference value. As a method of measuring the radio environment in the wireless mobile communication network environment and analyzing the common wireless interface message, the cause of call disconnection and setup failure, (a) measuring a wireless environment; (b) determining whether call disconnection and call establishment failed; (c) analyzing the cause of the abnormal call using the measured radio environment parameters and the common wireless interface message; And (d) classifying the cause matters according to the analysis result for each call cut and call setup failure; displaying the cause cut and setup failure cause analysis method. The method of claim 22, wherein step (c) comprises: Receiving a radio environment parameter and a common radio interface message and extracting a power measurement message and a block error rate information message from the radio environment parameter and the common radio interface message; And And determining a change of a pilot signal through the extracted message. The method of claim 23, wherein the determining comprises: A method for analyzing the cause of call truncation and call setup failure, characterized in that it is determined by using a signal-to-noise ratio value, a transmit / receive strength, or a mobile network code change of a pilot signal. The method according to any one of claims 22 to 24, wherein step (c) comprises: (1) analyzing the cause of the call setup failure when it is determined in step (b) that the call setup failure has occurred; And (2) analyzing the cause of call truncation when it is determined in step (b) that the call is truncated. The method of claim 25, wherein the step (1), Analyzing the mobile network code has changed since the start of the call; and if the change has been made, determining the cause of the call establishment failure as a carrier network transition. The method of claim 25, wherein the step (1), Analyzing whether the detected predominant signal-to-noise ratio value of the pilot signal has been greater than or equal to the reference value when the call is set up after the start of the call; To analyze the cause of arc cutting and setting failure. The method of claim 25, wherein the step (1), And determining the cause of the call establishment failure as an access handover failure when the observed predominant signal-to-noise ratio value of the pilot signal after the call initiation is greater than or equal to the reference value. The method of claim 25, wherein the step (1), A call disconnection, comprising: determining that the cause of the call establishment failure is the predominant pilot signal if the active predominant signal-to-noise ratio value of the pilot signal after the call starts is below the reference value and the signal reception strength is above the reference value; How to analyze the cause of call setup failure. The method of claim 25, wherein the step (1), The active dominant signal-to-noise ratio of the pilot signal since the start of the call, the monitored dominant signal-to-noise ratio value is below the reference value, or the dominant signal-to-noise ratio value activated without the terminal being aware of the value is below the reference value, and the signal reception strength is the reference value. And determining the cause of the call setup failure as the serving pilot member if it is less than the value. The method of claim 25, wherein the step (1), If the activated predominant hand signal code strength value of the pilot signal after the call start corresponds to the cell boundary value, there is no response from the upper system in the acquisition indication channel, and the transmission strength of the terminal is higher than the reference value, the cause of the call establishment failure is determined. A method for analyzing the cause of call truncation and call setup failure, comprising a procedure for determining that coverage is insufficient. The method of claim 25, wherein the step (1), If the dominant signal-to-noise ratio value activated after the call start is above the reference value and the block error rate of the block error rate information message is above the reference value, the procedure for determining the cause of the call establishment failure as a problem of the hardware equipment of the base station and the upper core network system is described. Call cutting and call setup failure cause analysis method comprising the. The method of claim 25, wherein step (2), Call disconnection, characterized in that for a predetermined time before the call disconnection time, if the reception strength of the pilot signal is greater than or equal to the reference value, and the transmission strength of the terminal is greater than or equal to the reference value, determining the cause of the call disconnection due to lack of coverage of the upper link And how to analyze the cause of a call setup failure. The method of claim 25, wherein step (2), If the activated dominant signal-to-noise ratio value of the pilot signal is greater than or equal to the reference value and the activated dominant main motor code and the detected dominant main motor code do not coincide for a predetermined time before the call truncation time, the cause of the call truncation is determined as missing the neighbor list. Procedure for analyzing the cause of the call truncation and call setup failure. The method of claim 25, wherein step (2), A method for determining the cause of failure of call truncation and call setup, comprising determining that the cause of the call truncation is the predominant pilot signal if the active predominant signal-to-noise ratio value of the pilot signal is less than or equal to the reference value for a predetermined time before the call truncation time. . The method of claim 25, wherein step (2), A method of determining the cause of call truncation as a serving pilot member if the activated predominant hand signal code strength value of the pilot signal is less than or equal to the reference value for a predetermined time before the call truncation time; . The method of claim 25, wherein step (2), If the active dominant signal-to-noise ratio value of the pilot signal is greater than or equal to the reference value and the block error rate of the block error rate information message is greater than or equal to the reference value, the cause of the call disconnection may be determined by the hardware equipment of the base station and the higher core network system. Call break and call setup failure cause analysis method comprising the step of determining the problem. The method according to any one of claims 22 to 24, wherein step (a) comprises: And an alarm step for notifying a predetermined signal-to-noise ratio value of a pilot signal, a signal transmission / reception strength, or a mobile network code change condition during a wireless environment measurement. The method of claim 38, wherein the alarm step, A method for analyzing the cause of call disconnection and call setup failure, comprising the step of informing the operator of the fact that the operator network has changed when the mobile network code is changed during the wireless environment measurement. The method of claim 38, wherein the alarm step, The method for analyzing the cause of call disconnection and call establishment failure, comprising a procedure of notifying higher link abnormality information when the signal reception strength is lower than the reference value or the transmission strength of the terminal becomes higher than the reference value during radio environment measurement. The method of claim 38, wherein the alarm step, A method for analyzing the cause of call disconnection and call establishment failure, comprising a procedure of notifying neighbor list abnormality information when the detected predominant signal-to-noise ratio value of the pilot signal during the radio environment measurement is less than the reference value. The method of claim 38, wherein the alarm step, And analyzing the pilot error information when the active predominant hand signal code strength value of the pilot signal during the radio environment measurement is less than or equal to the reference value. A recording medium that records a program that analyzes the wireless environment in a wireless mobile communication network environment and analyzes common wireless interface messages to analyze the cause of call disconnection and setup failure. Measuring the radio environment, and determining whether the call is disconnected or not. Receives measured radio environment parameters and common radio interface messages, extracts power measurement messages and block error rate information messages from these radio environment parameters and common radio interface messages, and measures the signal-to-noise ratio of the pilot signal or the signal transmit / receive strength or shift Procedures for determining whether a network code has changed and analyzing the cause of the corresponding call truncation and call setup failure. A computer-readable recording medium having recorded thereon a program which executes a procedure for classifying the cause matters according to the analysis result for each call cut and call setup failure.

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