KR20100082488A - Method for detecting call connection failure of base transceiver station in communication system and base station manager for executing the same - Google Patents

Abstract

The present invention relates to a method for detecting a call connection failure of a base station in a communication system and a base station management device for performing the same. In the communication system, a base station management device collects call statistics data by the number of call connections of a base station according to a set detection period, If the function for detecting a call connection failure is set, it is determined whether the collected call statistics data exists in the base station, and if the collected call statistics data does not exist, it is configured to perform a test call to the base station. According to the present invention, since the base station management apparatus itself detects a call connection failure for each base station in the communication system, it is possible to reduce resources such as manpower and time required to determine whether to perform a test call. In addition, since the base station management apparatus selects base stations under various conditions and performs a limited test call in a communication system, resources such as load and time required to perform the test call can be reduced.

Description

TECHNICAL SYSTEM AND BASE STATION MANAGER FOR EXECUTING THE SAME}

The present invention relates to a base station management method and a base station management apparatus for performing the same in a communication system including a plurality of base stations, and more particularly, to a method for detecting a call connection failure of a base station in a communication system and a base station management apparatus for performing the same.

In general, a communication system not only provides a communication service to a communication terminal, but also ensures mobility of the communication terminal. In this case, communication services include not only voice services but also various multimedia services such as message transmission, Internet communication, and financial settlement. In addition, communication systems have evolved to provide more information at high speed to communication terminals. Such a communication system is a wireless high-speed data system (CDMA2000 1x EV-DO; Code Division Multiple Access 2000 1x Enhanced Version-Data Only).

Such a communication system includes a plurality of base stations and a base station management apparatus. At this time, each base station can transmit and receive data through a call connection with the communication terminal in the communication system. The base station management apparatus manages base stations in a communication system. At this time, the base station management device can determine the number of call connection for each base station. Here, as the call connection is not substantially made at the base station or as a call connection failure occurs at the base station, there may be no call connection number of a specific base station within a predetermined time interval. In addition, the base station management apparatus may perform a test call to the base station. This is to detect a cause where there is no call connection number of the base station.

However, in the communication system as described above, the base station management apparatus may not only determine the number of call connections per base station, but may not directly determine whether to perform a test call to each base station. That is, whether or not to perform a test call to each base station is recognized by the operator of the communication system, the base station management device performs the test call unconditionally according to the instructions of the operator of the communication system. Therefore, in determining whether to perform a test call to the base station, there is a problem that requires a large amount of resources such as manpower and time. In addition, there is a problem in that resources such as enormous load and time are required to perform a test call in the base station management apparatus.

Method for detecting a call connection failure for each base station in a communication system including a plurality of base stations according to the present invention for solving the above problems, the process of collecting call statistics data by the number of call connection of the base station according to the set detection period; If a function for detecting a call connection failure is set, determining whether the collected call statistics data exists in the base station; and if the collected call statistics data does not exist, a test call is sent to the base station. It is characterized by including the process of performing.

On the other hand, in a communication system including a plurality of base stations according to the present invention for solving the above problems, the base station management apparatus for detecting a call connection failure for each base station, the call statistics data by the number of call connection of the base station according to the set detection period A collecting unit for collecting, a function for detecting a call connection failure, a determining unit for determining whether the collected call statistics data exists in the base station, and if the collected call statistics data does not exist It includes a test unit for performing a test call to the base station.

Therefore, in the communication system according to the present invention as described above, the method for detecting a call connection failure of a base station and a base station management apparatus that performs the same include resources such as manpower and time required to determine whether to perform a test call in the communication system. Can be saved. That is, regardless of being recognized by the operator of the communication system, the base station management device may detect the call connection failure by base station itself. In addition, since the base station management apparatus selects the base stations under various conditions and performs a limited number of test calls, the frequency of performing the test call can be reduced. For this reason, by restraining unnecessary test calls from the base station management apparatus, it is possible to reduce resources such as load and time required to perform the test calls. In addition, in the communication system, the base station management apparatus may set a failure alarm on its own to provide a cause of the failure of the test call, thereby saving resources such as the time when the call connection failure of the base stations is recovered by the operator of the communication system. Accordingly, convenience of communication terminal users in a communication system can be improved.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, the same components in the accompanying drawings should be noted that the same reference numerals as possible. And a detailed description of known functions and configurations that can blur the gist of the present invention will be omitted.

In the following description, the term " call connection " means that a connection is made between a base transceiver station (BTS) and an access terminal (AT) for communication purposes in a communication system. The term " call connection failure " means that the call connection between the base station and the communication terminal fails due to a specific cause in the communication system. That is, in the communication system, the base station and the communication terminal may not be substantially connected to the call, and call connection may fail due to a call connection failure. In this case, the call connection failure may include, for example, a failure factor in hardware (HardWare; HW) or software (SoftWare; SW) of the base station, an error in setting a parameter for call processing, or a base station and a communication terminal. This may occur when the radio environment is poor.

The term " traffic " refers to the number of times a communication is made through a call connection between a specific base station and a communication terminal without a call connection failure in a communication system. The term "detection period" means a time interval for detecting a call connection failure for each base station in a communication system. That is, the communication system repeatedly performs an operation for detecting a call connection failure according to a detection period. The term "Call Final Class (CFC)" refers to the number of call connections in a particular detection period. The term "CFC DataBase (CFC DB)" means a list of call statistics data. That is, the call statistics list means the number of call connection by detection period.

In addition, the term "Test Application Specification (TAS)" means an attempt to connect a call to evaluate whether a call connection is possible between a specific base station and a communication terminal in a communication system. At this time, the test call attempts a virtual call connection, not an actual call connection between the base station and the communication terminal. The term "TAS interval" means the time to wait before performing a test call. At this time, the test waiting time may be determined at a time interval corresponding to at least one detection period. Here, the test waiting time may be any one of 0 to 48. The term " failure alarm " means an alarm for notifying a call connection failure of a particular base station in a communication system. In this case, the failure alarm may be performed through at least one of a text signal, an image signal, an audio signal, and the like.

1 is a block diagram showing the structure of a general communication system. In the present embodiment, it is assumed that the communication system is a wireless high speed data system.

Referring to FIG. 1, the communication system of the present embodiment includes a base station 110, a base station controller (BSC) 130, a global asynchronous transfer mode switch network (GAN) 150, and a base station manager (Base Station Manager). BSM 200). Such a communication system is configured to provide a communication service to the communication terminal 100 and to ensure mobility of the communication terminal 100.

The base station 110 performs communication through a call connection with the communication terminal 100. In this case, the base station 110 may transmit and receive audio signals or packet data with the communication terminal 100. The control station 130 controls the base station 110. At this time, the control station 130 performs functions such as location registration, call connection and session control, handoff processing, and the like of the communication terminal 100. Each control station 130 may control M, for example 128 base stations 110. The information network 150 provides a communication path between the control stations 130. In this case, the information network 150 may control N, for example, 12 control stations 130. The base station management apparatus 200 manages and operates a communication system. The base station management apparatus 200 is connected one-to-one with the information network 150. That is, the base station management apparatus 200 manages the base stations 110 in the communication system. At this time, the base station management apparatus 200 may determine the number of call connections for each base station 110. In addition, the base station management apparatus 200 may perform a test call to the base station 110 through the control station 130.

In this communication system, a base station management apparatus according to an embodiment of the present invention will be described in detail as follows. 2 is a block diagram showing an internal configuration of a base station management apparatus according to an embodiment of the present invention.

2, the base station management apparatus 200 according to the present embodiment includes a wireless communication unit 210, a key input unit 220, a memory 230, a control unit 240, an audio processing unit 250, and a display unit 260. do.

The wireless communication unit 210 performs a communication function of the base station management apparatus 200. The wireless communication unit 210 includes a transmitter for upconverting and amplifying a frequency of a transmitted signal, a receiver for low noise amplifying and downconverting a received signal, and the like.

The key input unit 220 is composed of keys for inputting numeric and character information and function keys for setting various functions. In this case, the key input unit 220 may be implemented as, for example, a keypad, a jog dial, a touch pad, a joy stick, or the like.

The memory 230 may be composed of a program memory and data memories. The program memory stores programs for controlling general operations of the base station management apparatus 200. In this case, the program memory stores programs for detecting a call connection failure for each base station 110 according to an exemplary embodiment of the present invention. The data memory performs a function of storing data generated while executing programs. The memory 230 stores a call statistics list for each base station 110 according to an embodiment of the present invention. The memory 230 stores detection setting information of a function for detecting a call connection failure for each base station 110 according to an exemplary embodiment of the present invention.

The controller 240 performs a function of controlling the overall operation of the base station management apparatus 200. In this case, the control unit 240 includes a data processing unit including a transmitter for encoding and modulating a transmitted signal and a receiver for demodulating and decoding a received signal. Here, the data processing unit may be composed of a modem and a codec. The codec includes a data codec for processing packet data and the like and an audio codec for processing audio signals such as voice. The controller 240 includes a collecting unit 241, a determining unit 243, a testing unit 245, and a setting unit 247 according to an embodiment of the present invention.

The collector 241 collects call statistics data for each base station 110 according to a detection period. The collection unit 241 may update the call statistics list for each base station 110 by adding call statistics data according to a detection period. The determination unit 243 determines whether a function for detecting a call connection failure is set for each base station 110. The determination unit 243 determines whether call statistics data exists in the corresponding base station 110 when a function for detecting a call connection failure is set in the specific base station 110. The test unit 245 performs a test call for each base station 110. At this time, if the call statistics data does not exist in the specific base station 110, the test unit 245 performs a test call to the base station (110). The setting unit 247 sets a failure alarm of the base station 110 when the test call of the specific base station 110 fails. At this time, the setting unit 247 may output a failure alarm. When the test call of the specific base station 110 succeeds, the setting unit 247 releases the failure alarm of the base station 110.

The audio processor 250 reproduces a received audio signal output from the audio codec of the data processor through the speaker SPK or transmits a transmission audio signal generated from the microphone MIC to the audio codec of the data processor. .

The display unit 260 displays the user data output from the controller 240. The display unit 260 may use an LCD. In this case, the display unit 260 may include an LCD controller, a memory capable of storing image data, and an LCD display device. In this case, when the LCD is implemented using a touch screen method, the LCD may operate as an input unit.

The procedure for detecting a call connection failure of the base station 110 in the base station management apparatus 200 is as follows. 3 is a flowchart illustrating a call connection failure detection procedure of a base station according to an embodiment of the present invention. 4 is an exemplary diagram for describing an example of a relationship between a call statistics data collection procedure and a call connection failure detection function performing procedure in FIG. 3, and FIGS. 5A to 5D illustrate an example of collecting call statistics data in FIG. 3. It is an exemplary figure for following.

Referring to FIG. 3, in the call connection failure detection procedure of the present embodiment, when a request for setting a call connection failure detection function occurs, the controller 240 detects this in step 311, and the call connection failure detection function in step 313. Start by setting. That is, the controller 240 may determine whether to perform a call connection failure detection function for each base station 110 or may change it. In this case, the controller 240 may set a call connection failure detection function for each base station 110 and store detection setting information as shown in Table 1 below.

Shape information Detection information Construction information Environmental information Restriction Information

BSC # 0 BTS # 0 U ON Under construction - - BTS # 1 U ON - COMMUNICATION FAIL - BTS # 2 radish OFF - - -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
-

That is, the controller 240 may set shape information indicating whether the base station 110 is used for call connection. For example, even if a particular base station 110 is installed, if not to be used for call connection, the controller 240 may set the shape information of the base station 110 to 'no'. Alternatively, if a specific base station 110 is installed and will be used for call connection, the controller 240 may set the shape information of the base station 110 to 'y'.

In addition, the controller 240 may set detection information for determining a call connection failure detection function of the base station 110 as an ON or OFF state. For example, if it is necessary to detect a call connection failure of a specific base station 110, the controller 240 may set the detection information of the base station 110 to the 'on' state. Alternatively, if the call connection failure of the specific base station 110 is not detected, the controller 240 may set the detection information of the corresponding base station 110 to an 'off' state.

In addition, the controller 240 may set construction information indicating whether the base station 110 is under construction. For example, if a particular base station 110 is under construction, the control unit 240 may set the construction information of the base station 110 to 'under construction', it may be released. Here, the controller 240 may set the base station 110 to 'under construction' for the initial installation, repair, reason, etc. of the specific base station 110.

In addition, the controller 240 may set environment information indicating whether a wireless environment between the base station control apparatus 200 and the base station 110 and a wireless environment between the base station control apparatus 200 and the control station 130 are available for communication. have. For example, if the wireless environment between the base station controller 200 and the base station 110 or the control station 130 is impossible for communication, the controller 240 sets the environment information of the base station 110 to 'communication fail'. You can also disable it.

In addition, the controller 240 may set restriction information indicating whether the call connection is limited to the base station 110. For example, if a call connection is restricted to a specific base station 110, the controller 240 may set the restriction information of the base station 110 to 'limiting', and may release it. Here, when the number of call connection of the specific base station 110 exceeds the preset threshold, when an alarm such as 'call count over' or 'system overload' occurs, the controller 240 'limits' the base station 110. Can be set to '.

On the other hand, when a request for setting the call connection failure detection function is not detected in step 311, when the detection period 401 for collecting call statistics data arrives, the controller 240 detects it in step 321, In step 323, the base station 110 collects call statistics data. That is, the control unit 240 collects call statistics data according to the detection period 401 as shown in FIG. For example, the controller 240 may collect call statistics data every 15 minutes. In other words, the controller 240 may collect call statistics data at 0 minutes, 15 minutes, 30 minutes, and 45 minutes every hour. Here, the controller 240 collects call statistics data every 5 minutes and accumulates the call statistics data every 15 minutes, as shown in FIGS. 5A to 5D, thereby collecting the call statistics data according to the detection period 401. Can be collected. At this time, the control unit 240 may update the call statistics list for each base station 110 by adding call statistics data according to the detection period 401.

As described above, a procedure of collecting call statistics data in the control unit 240 will be described in detail as follows. FIG. 6 is a flowchart illustrating a call statistics data collection procedure in FIG. 3.

Referring to FIG. 6, when the detection period 401 arrives, the controller 240 determines k as 1 in step 611 and then determines whether call statistics data of the base stations 110 are acquired in step 613. In this case, if it is determined that call statistics data is not acquired in step 613, the control unit 240 increases k by 1 in step 615, and then, in step 617, the number of acquisitions preset in advance such that k repeatedly acquires call statistics data ( It is determined whether it is the same as K). Herein, if it is determined in step 617 that k is not equal to the number of acquisitions, the controller 240 may repeat steps 613 to 617. For example, the controller 240 may repeat step 613 at intervals of 10 seconds.

On the other hand, if it is determined in step 617 that k equals the number of acquisitions, the controller 240 terminates the call connection failure detection procedure. In this case, the controller 240 may set an alarm such as 'NO CFC DATA FOR 0 CALL' indicating that there is an error in collecting call statistics data in the communication system.

If it is determined in step 613 that call statistics data has been acquired, the controller 240 stores the call statistics data in the call statistics list in step 619 and returns to FIG. 3. At this time, the control unit 240 stores the call statistics data corresponding to the current detection period. Here, when an error occurs in collecting call statistics data in the communication system, if an alarm such as 'NO CFC DATA FOR 0 CALL' is set, the controller 240 may release it.

Next, after collecting call statistics data in step 323, when the execution cycle 403 for performing a call connection failure detection function arrives, the control unit 240 detects this in step 325 and the base station 110 in step 327. Call connection failure detection is then performed. That is, the controller 240 performs a call connection failure detection function according to the execution cycle 403 as shown in FIG. 4. For example, the controller 240 may perform a call connection failure detection function every 15 minutes, but may perform a call connection failure detection function 2 minutes and 30 seconds after the detection period 401. In other words, the controller 240 may perform a call connection failure detection function every 2 minutes 30 seconds, 17 minutes 30 seconds, 32 minutes 30 seconds, and 47 minutes 30 seconds.

As described above, a procedure of performing a call connection failure detection function by the controller 240 will be described in more detail as follows. 7A and 7B are flowcharts illustrating a procedure of performing a call connection failure detection function in FIG. 3. 8 is an exemplary diagram for describing an example of determining whether call statistical data corresponds to low statistical data in FIGS. 7A and 7B, and FIG. 9 illustrates an example of performing a test call in FIGS. 7A and 7B. FIG. 10 is an exemplary view for explaining, and FIG. 10 is an exemplary view for explaining a modified example of FIG. 9.

7A and 7B, when the execution cycle 403 arrives, the controller 240 searches for detection setting information of the specific base station 110 in step 711. In operation 713, the controller 240 determines whether a call connection failure detection function is set in the corresponding base station 110. At this time, the control unit 240 may determine whether a call connection failure detection function is set in the base station 110 according to the shape information, detection information, construction information, environmental information, and restriction information of the base station 110. have. Here, if the shape information, detection information, construction information, environmental information, and restriction information of the base station 110 meets a predetermined condition, the controller 240 indicates that the call connection failure detection function is set in the base station 110. You can judge. Alternatively, if at least one of the shape information, detection information, construction information, environmental information, or restriction information of the base station 110 does not meet a predetermined condition, the control unit 240 has a call connection failure detection function at the base station 110. It can be judged that it is not set.

For example, if the shape information of the base station 110 is set to 'Y', the controller 240 may determine that a call connection failure detection function is set in the base station 110. If the detection information of the base station 110 is set to an 'on' state, the controller 240 may determine that a call connection failure detection function is set in the base station 110. In addition, if the construction information of the base station 110 is not set to 'under construction', the control unit 240 may determine that the call connection failure detection function is set in the base station 110. In addition, if the environment information of the base station 110 is not set to 'communication fail', the controller 240 may determine that the call connection failure detection function is set in the base station 110. Further, if the restriction information of the base station 110 is not set to 'limiting', it may be determined that the call connection failure detection function is set in the base station 110.

Next, when it is determined that the call connection failure detection function is set in the corresponding base station 110 in step 713, the controller 240 determines whether call statistical data exists in the corresponding base station 110 in the detection period in step 715. Determine whether or not. In this case, if it is determined that call statistical data does not exist in the corresponding base station 110 in step 715, the controller 240 determines whether a failure alarm is set in the corresponding base station 110 in step 717.

Subsequently, if it is determined in step 717 that a failure alarm is not set in the corresponding base station 110, the control unit 240 searches for a call statistics list of the corresponding base station 110 in step 719. In operation 721, the controller 240 determines whether the call statistical data of the corresponding base station 110 corresponds to the low statistical data.

That is, the controller 240 retrieves call statistics data corresponding to a past detection period before a time interval set from the current detection period in the call statistics list of the base station 110. For example, the controller 240 retrieves call statistics data of a past detection period of one week or two weeks before the current detection period. At this time, if there is no call statistics data of the past detection period, the control unit 240 may determine that the call statistics data of the base station 110 corresponds to the low statistics data. If call statistics data of a past detection period exists, the controller 240 may determine that call statistics data of the corresponding base station 110 do not correspond to low statistics data.

Alternatively, as shown in FIG. 8, the control unit 240 accumulates the first call statistics accumulated from the first past detection period 803 before the time interval set from the current detection period 801 in the call statistics list of the corresponding base station 110. Retrieve the data. For example, the controller 240 accumulates call statistical data for six hours from the first past detection period 803 six hours before the current detection period 801 to grasp the first call statistical data. The controller 240 determines whether the first call statistical data is equal to or larger than a set value. At this time, if it is determined that the first call statistical data is less than the threshold value, the controller 240 accumulates the second accumulated second period from the second past detection period 805 between the first past detection period 803 and the present detection period 801. Retrieve call statistics data. For example, the controller 240 accumulates the call statistics data for two hours from the second past detection period 805 two hours ago to grasp the second call statistics data. Here, if the second call statistical data does not exist, the controller 240 may determine that the call statistics data of the base station 110 corresponds to the low statistics data. In addition, if it is determined that the first call statistics data is greater than or equal to the threshold value, or the second call statistics data exists, the controller 240 may determine that the call statistics data of the corresponding base station 110 does not correspond to the low statistics data. .

Subsequently, if it is determined in step 721 that the call statistical data of the base station 110 does not correspond to the low statistical data, the control unit 240 performs a test call to the base station 110 in step 723. The controller 240 determines whether the test call succeeds in step 725. At this time, if it is determined that the test call is not successful in step 725, the control unit 240 sets a failure alarm to the base station 110 in step 727. In this case, the controller 240 may output the failure alarm to at least one of a text signal, an image signal, an audio signal, and the like. The controller 240 outputs the cause of the call connection failure.

On the other hand, if it is determined in step 717 that the failure alarm is set in the base station 110, the control unit 240 performs a test call to the base station 110 in step 729. The controller 240 determines whether the test call succeeds in step 731. At this time, if it is determined that the test call is not successful in step 731, the control unit 240 maintains the failure alarm of the base station 110 in step 733 as set. Alternatively, if it is determined in step 733 that the test call is successful, the control unit 240 releases the failure alarm of the base station 110 in step 735.

On the other hand, in the present embodiment, the control unit 240 is disclosed as being able to perform a test call for each base station 110 in every detection period, but is not limited thereto. That is, if the test call succeeds in the past detection period 901 consecutive to the current detection period 903 as shown in FIG. 9, the controller 240 may wait according to the test waiting time and then perform the test call. . For example, if the test waiting time is 0, the controller 240 may perform a test call within the current detection period 903. That is, the controller 240 may perform a test call without waiting. Alternatively, when the test waiting time is 1, the controller 240 may wait for a test waiting time corresponding to the detection period and then perform a test call. That is, the controller 240 may perform a test call in the next detection period 905 which is continuous to the current detection period 903. In other words, if the detection period is 15 minutes, the controller 240 may wait for a test waiting time corresponding to the detection period, that is, 15 minutes, and then perform a test call.

On the other hand, when the test call succeeds in the past detection period 907 subsequent to the first detection period 909 and changes the other test waiting time during the waiting according to the test waiting time, the control unit 240 is different as shown in FIG. 10. You can wait according to the test waiting time and then perform the test call. For example, when the test waiting time is 1, the controller 240 may wait in the first detection period 909 and then perform the test call in the second detection period 909. On the other hand, when changing from the waiting test waiting time 1 to another test waiting time 2 in the first detection period 909, the control unit 240 according to the other test waiting time from the change time 911, the second detection period 913 And wait in the third detection period 915 and then perform the test call in the fourth detection period 917.

Finally, in step 725, the test call is determined to be successful, or the fault alarm is set in step 727 or 733, or the fault alarm is released in step 735, the control unit 240 performs a call connection failure detection function in step 737. It is determined whether another base station 110 exists. In this case, if it is determined that another base station 110 exists in step 737, the controller 240 may repeat steps 711 to 737. If it is determined in step 737 that the other base station 110 does not exist, the controller 240 terminates the call connection failure detection function execution procedure and returns to FIG. 3.

On the other hand, if it is determined in step 711 that the call connection failure detection function is not set in the base station 110, the control unit 240 proceeds to step 737. This is because it may be determined that it is unnecessary to detect a call connection failure of the base station 110. Alternatively, if it is determined in step 713 that call statistics data exists in the base station 110, the control unit 240 proceeds to step 737. This is because it may be determined that a call connection failure does not occur in the corresponding base station 110. Alternatively, if it is determined in step 721 that the call statistical data of the base station 110 is the low statistical data, the control unit 240 proceeds to step 737. This is because it can be determined that the number of call connections to the base station 110 is small.

At this time, the control unit 240 may perform a call connection failure detection function according to unique identification information (IDentifier ID) for each base station 110. That is, the controller 240 may perform the call connection failure detection function in the order of the identification information of the base station 110 is low to high. In addition, when performing a call connection failure detection function of a specific base station 110, the controller 240 may perform a call connection failure detection function limited to a specific subcell of the base station 110. Similarly, the controller 240 may perform a call connection failure detection function according to unique identification information for each subcell. That is, the control unit 240 may perform the call connection failure detection function in the order of the identification information of the subcell is low to high. Here, the identification information for each structure of the base station 110 may be determined as shown in Table 2 below.

BTS ID FA ID SECTOR ID subcell ID


0


0 0 0 One One 2 2
One
0 3 One 4 2 5 -
-
- -
-
- -
-
- -
-
-

In the state where the detection period 401 is not detected in step 321, the control unit 240 may perform a separate corresponding function in step 331. In this case, the controller 240 may release the failure alarm of the specific base station 110. For example, after a failure alarm of a specific base station 110 is set and the setting of the call connection failure detection function of the corresponding base station 110 is changed, the controller 240 may release the failure alarm of the corresponding base station 110. have. For example, the shape information of the base station 110 is set to 'no', the construction information is set to 'under construction', the restriction information is set to 'limiting', or the detection information is set to the 'off' state. When set, the controller 240 may release the failure alarm of the base station 110.

According to the present invention, it is possible to save resources such as manpower and time required to determine whether or not the base station management device performs a test call in the communication system. That is, regardless of being recognized by the operator of the communication system, the base station management device may detect the call connection failure by base station itself. In addition, since the base station management apparatus selects the base stations under various conditions and performs a limited number of test calls, the frequency of performing the test call can be reduced. For this reason, by restraining unnecessary test calls from the base station management apparatus, it is possible to reduce resources such as load and time required to perform the test calls. In addition, in the communication system, the base station management apparatus may set a failure alarm on its own to provide a cause of the failure of the test call, thereby saving resources such as the time when the call connection failure of the base stations is recovered by the operator of the communication system. Accordingly, convenience of communication terminal users in a communication system can be improved.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention. That is, it will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented.

1 is a block diagram showing the structure of a general communication system;

2 is a block diagram showing an internal configuration of a base station management apparatus according to an embodiment of the present invention;

3 is a flowchart illustrating a call connection failure detection procedure of a base station according to an embodiment of the present invention;

4 is an exemplary view for explaining an example of a relationship between a call statistics collection procedure and a call connection failure detection function performing procedure in FIG. 3;

5A through 5D are exemplary diagrams for describing an example of collecting call statistics data in FIG. 3;

6 is a flowchart illustrating a call statistics data collection procedure in FIG.

7A and 7B are flowcharts illustrating a procedure for performing call connection failure detection function in FIG. 3;

8 is an exemplary view for explaining an example of determining whether call statistical data corresponds to low statistical data in FIGS. 7A and 7B;

FIG. 9 is an exemplary view for explaining an example of performing a test call in FIGS. 7A and 7B; and

10 is an exemplary diagram for describing a modification of FIG. 9.

Claims (20)

A method for detecting a call connection failure per base station in a communication system including a plurality of base stations, Collecting call statistics data by the number of call connections of the base station according to the set detection period; If a function for detecting a call connection failure is set, determining whether the collected call statistics data exists in the base station; If the collected call statistics data does not exist, performing a test call to the base station. The method of claim 1, And if the test call fails, setting a failure alarm of the base station. The method of claim 2, wherein the test call is performed. If the failure alarm is set, call failure detection method characterized in that performed. The method of claim 3, wherein the call statistics data collection process, And when the call statistics data is obtained, storing the obtained call statistics data in a call statistics list corresponding to a current detection period. The method of claim 4, wherein the performing of the test call, Retrieving stored call statistics data corresponding to a past detection period before a set time interval from the current detection period in the call statistics list if the failure alarm is not set; And if the stored call statistics data exists, performing the test call. The method of claim 4, wherein the performing of the test call, If the failure alarm is not set, retrieving first call statistical data accumulated from a first past detection period before a time interval set from the current detection period in the call statistics list; If the first call statistical data is equal to or greater than a set threshold, the test call is performed; otherwise, the second call statistical data accumulated from the second past detection period between the first past detection period and the current detection period is retrieved. Process, If the second call statistical data does not exist, performing the test call. The method of claim 3, wherein Determining whether at least one of the base stations has a function for detecting a call connection failure; The determination process of the setting, Whether the base station is set to be used for call connection, whether the call connection failure detection function of the base station is on, whether the base station is under construction, between the base station or a control station for controlling the base stations And determining at least one of whether a wireless environment is available for communication or whether the call connection is limited to the base station for each base station. The method of claim 4, wherein the performing of the test call, If the failure alarm is not set, the call connection failure detection method characterized in that performed after waiting for the set test waiting time. The method of claim 3, wherein And if the test call succeeds, releasing the set failure alarm. The method of claim 4, wherein the call statistics data collection process comprises: If the call statistics data is not obtained, the call connection failure detection method is repeatedly performed according to the number of acquisitions set in the current detection period. A base station management apparatus for detecting a call connection failure for each base station in a communication system including a plurality of base stations, A collector for collecting call statistics data based on the number of call connections of the base station according to a set detection period; A determination unit for determining whether the collected call statistics data exists in the base station if a function for detecting a call connection failure is set; And a test unit for performing a test call to the base station if the collected call statistics data does not exist. The method of claim 11, And a setting unit configured to set a failure alarm of the base station if the test call fails. The method of claim 12, wherein the test unit, If the failure alarm is set, the base station management device, characterized in that performed. The method of claim 13, And a memory for storing a call statistics list for managing the call statistics data for each detection period. The method of claim 14, wherein the test unit, If the failure alarm is not set, the stored call statistics data is retrieved from the call statistics list corresponding to a past detection period before a set time interval from the current detection period, and if the stored call statistics data exists, the test call Base station management apparatus, characterized in that for performing. The method of claim 14, wherein the test unit, If the failure alarm is not set, the first call statistics data accumulated from the first past detection period before the time interval set from the current detection period is retrieved from the call statistics list, and the threshold is set. If it is equal to or greater than the value, the test call is performed; otherwise, the second call statistical data accumulated from the second past detection period between the first past detection period and the current detection period is retrieved, so that the second call statistical data is obtained. And if not present, perform the test call. The method of claim 13, wherein the determination unit, Whether the base station is set to be used for call connection, whether the call connection failure detection function of the base station is on, whether the base station is under construction, between the base station or a control station for controlling the base stations A function for detecting a call connection failure in at least one of the base stations by determining at least one of each of the base stations whether or not a wireless environment is available for communication or whether the call connection is limited to the base station is provided. And determining whether or not it is set. The method of claim 14, wherein the test unit, If the failure alarm is not set, the base station management device, characterized in that for performing the test call after waiting for the set test waiting time. The method of claim 13, wherein the setting unit, And if the test call succeeds, the set failure alarm is released. The method of claim 14, wherein the collecting unit, And when the call statistics data is not obtained, collect the call statistics data by repeating the number of acquisitions set within the current detection period.

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