KR20020047598A - Quality of service management method for mobile communication network - Google Patents

Abstract

PURPOSE: A method for managing quality of telephone for wireless communication network is provided to manage wholly quality of telephone, such as to find present conditions of quality of telephone and analyze the cause of badness. CONSTITUTION: A measurement device(10) collects measurement data(quality information, coordinate information, time information) about the measuring areas of quality of telephone and provides the collected data to an analyzer(20). A main processor within the measurement device(10) sets the absolute coordinate of the present position received from a GPS receiver as a start position. The main processor calculates a relative distance for moving a terminal or a system body by the direction information and acceleration information provided from the respective direction sensors and accelerator sensors. The main processor traces the coordinate of moved position by adding the calculated relative distance to the moving start position. The main processor receives a parameter of wireless communication signal received by the terminal at the moved position for every second. A quality management server(21) implements a link function with an exchanger, a base station and quality relation other systems, a capability management system, a fault management system and a structure information system. The quality management server(21) integrates the measurement data.

Description

Quality of service management method for mobile communication network

The present invention relates to a call quality management method of a wireless communication network and a computer-readable recording medium recording a program for realizing the method. More particularly, the call quality measurement data and code division multiple access of a call quality measurement equipment ( CDMA: Code Division Multiple Access (CDMA) It collects and analyzes the configuration information, communication information, and fault information of the mobile communication network so that the call quality of the mobile communication network can be collectively managed (finding the status of the call quality and analyzing the cause of the failure).

Call quality of mobile communication is generally evaluated by five quality indicators: terminal reception power, signal-to-interference ratio (Ec / Io), terminal transmission power, terminal transmission power control, and frame error probability.

However, the wireless network quality index can only grasp the area of poor call quality, and it is impossible to analyze the cause of the bad.

In order to identify the cause of poor call quality in the wireless network section, a separate tool must analyze the Common Air Interface (CAI) message.

However, the amount of CAI message is huge because it is always transmitted between the mobile station and the base station. However, in order to improve call quality, CAI message analysis is required when call origination and reception fail and disconnection occurs during call connection.

However, the conventional method could not analyze the CAI message in conjunction with the map, and could not analyze the case where the call failed and the disconnection occurred during the call. Therefore, there is a difficulty in storing and managing unnecessary CAI messages.

In addition, conventionally, only the call quality data in the wireless network section is analyzed and analyzed. Therefore, it was not known whether the degradation of call quality was caused by radio wave environment or system failure in wired network.

Moreover, since it was only possible to inquire the configuration information of the present state in the past, the expected change after the call quality improvement activity was not known.

The present invention devised to solve the problems described above, the call quality management method for managing the overall call quality of the wireless communication network (call quality status analysis and failure cause analysis, etc.) and a program for realizing the method Its purpose is to provide a computer-readable recording medium having recorded thereon.

1 is an exemplary configuration of a call quality management system to which the present invention is applied.

2 is a flowchart illustrating an embodiment of a method for managing call quality according to the present invention;

* Explanation of symbols for the main parts of the drawings

10: measuring instrument 20: call quality management server (QMS)

30: Operation and Maintenance Center (OAM)

In order to achieve the above object, the present invention provides a call quality management method in a call quality management system, comprising: a first step of a call quality management server collecting call quality measurement data through a measuring device; A second step of the call quality management server collecting system data including communication information, failure information, and configuration information from an operation and maintenance (OAM) center; A third step of databaseting and managing the call quality data and the system data in the call quality management server, analyzing the measurement data and the system data to identify a current state of call quality and to identify a cause of poor call quality; And a fourth step of informing the operator of the analyzed result according to the analysis result of the third step.

In addition, the present invention is characterized in that it further comprises a fifth step of extracting the corresponding call quality data stored in the database and output to the operator at the request of the operator.

In order to achieve the above object, the present invention provides a call quality management system having a processor for managing call quality of a wireless communication network, comprising: a first function of a call quality management server collecting call quality measurement data through a measuring device; A second function of the call quality management server collecting system data including communication information, failure information, and configuration information from an operation and maintenance (OAM) center; A third function of databaseting and managing the call quality data and the system data in the call quality management server, analyzing the measurement data and the system data to identify a current state of call quality and to identify a cause of poor call quality; And a computer readable recording medium having recorded thereon a program for realizing a fourth function of informing the operator of the analyzed result according to the analysis result of the third function.

The present invention also provides a computer-readable recording medium having recorded thereon a program for further realizing a fifth function of extracting and outputting corresponding call quality data stored in a database upon an operator's request.

The present invention relates to a method for managing call quality, and collects and analyzes measurement data of call quality measuring equipment, configuration information of mobile communication network, communication information, and fault information in order to grasp the current state of call quality and to analyze the cause of poor call quality. It is possible to manage the call quality of the mobile communication network.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a call quality management system to which the present invention is applied. In the drawing, "10" is a measuring instrument, "20" is a call quality management server (QMS), and "30" is operated and maintained. Represents each OAM (Operation Administration and Maintenance) Center.

The measurer 10 collects measurement data (quality information, coordinate information, time information) for a call quality measurement region and provides the analyzer 20 with the measurement data.

At this time, the main processor in the meter 10 when measuring the call quality of the wireless section in the out-door area, the absolute coordinate of the current position provided from the GPS (GPS) receiver as the start position, each direction sensor and acceleration The relative distance at which the terminal or the system body moves is calculated using the direction information and the acceleration information provided from the sensor, and the coordinates of the moved position are tracked by adding the calculated relative distance to the movement start position. At this time, the position coordinate tracked when measuring the call quality of the wireless section in the out-door area means the relative position coordinate moved from the absolute start position coordinate.

In addition, the main processor receives a parameter of a wireless communication signal received by the terminal at a predetermined time interval, for example, every 1 second. Therefore, the moved position every one second interval is set to the wireless section call quality measurement position.

In addition, the coordinate values of the measurement position set by the main processor and the parameter values provided from the terminal at the measurement position are mapped to each other and stored in a table form. By repeating this process, it is possible to extract the parameters used to measure the call quality of radio sections at various locations within a specific area of the out-door.

In addition, the call quality measurement table (measurement data) stored by the main processor may be stored in a storage medium, for example, a flash memory, a hard disk, or transmitted to the analyzer 20 in real time.

The measuring device 10 can be used as a portable diagram that a measurer can carry on the vehicle and carry the wireless section call quality, or can be fixedly placed and operated in an area where the call quality of the wireless section needs to be intensively checked. It can also be used for fixing purposes.

In case of fixed use, it is necessary to know the absolute coordinate value of the fixedly arranged measuring position. Therefore, the GPS receiver is interfaced through the spare port of the main processor to determine the absolute coordinate of the fixedly arranged position, The call quality measured at this coordinate is mapped and stored in the storage medium.

The call quality management server 20 manages enterprise data in the form of a database when managing quality measurement data, and is designed to be used as a web only for authorized users. Support is also available for measuring equipment.

The call quality management server 20 implements an interworking function with an exchange, a base station and other quality-related systems, a performance management system, a failure management system, and a configuration information system (including base station operation information (PLD: Prgrammable Logic Devices)), and produces each product. It should be constructed to be used in the post of the headquarters management team. In addition, the call quality management server 20 shares quality measurement data and geographic information data with a coverage management system (CMS) and a cell plan system.

The call quality management server 20 integrates and actualizes measurement data. Looking at this in detail.

The central call quality management integration server 21 integrates and manages call quality measurement data that is managed for each central and region.

The central call quality management integrated server 21 collects the measured data of the call quality management area server 22 in real time and stores the measured data in the database 23 and, once inevitable such as a load problem of the server, is performed once a day. The DB-based measurement data is always kept up to date.

After quality measurement, raw data is managed as E-Files and L-Files.

E-File consists of data related to call quality, and basic analysis is done by E-File.

L-File is composed of CAI message between base station and terminal and is used for detailed analysis. L-File is a binary file with a data size of about 10 times that of E-File.

The call quality management server 20 stores the CAI message of the L-File only within 30 seconds before and after the point where the call has failed and the call is cut, thereby reducing the data size and simultaneously analyzing the cause of the poor call quality. Let's do it.

The call quality management server 20 collects and utilizes communication / disability data so as to identify the cause of poor call quality in the wireless network section and at the same time identify the cause of call quality in the wired section.

Here, the communication data is collected from the communication server of the operation and maintenance center (OAM) 30 in real time (units provided by the OAM center) to the call quality management integration server 21, the call quality management integration server 21 After the DB in the database is replicated to the call quality management region server 22 of each region. The reconstructed traffic data is used for call quality analysis, and the current status of the base station and the local traffic status are displayed on a map.

On the other hand, the failure data is collected from the operation and maintenance center 30 in real time (units provided by the OAM center) to the central call quality management integration server 21, DB after the call quality management integration server 21 The call quality control area server 22 of each region is replicated. The reconstructed failure data is used for call quality analysis, and the current status of the base station and the local failure status are displayed on a map.

The call quality management server 20 collects configuration information so that an operator can grasp the current state of the mobile communication system and perform call quality improvement activities.

The configuration information includes base station information and repeater information.

The base station position information brings the latitude / longitude data of the base station from the base station configuration information to the central call quality management integrated server 21, and the central call quality management integrated server 21 uses the information to determine the position data of the base station. Generated automatically. In addition, the generated base station location data is replicated to the call quality management area server 22 of each area so that the center and the area always maintain the same up-to-date base station information.

The optical repeater information is managed by each production headquarters operation team, and inputs the optical repeater information (including mortgage station information) on a text or map using the local call quality control region server 22. In addition, the central call quality management integrated server 21 collects the optical repeater information of each production headquarters at least once a day (when necessary, if necessary) to the DB to integrate the optical repeater information of the whole country.

Other, repeater (including various RF repeaters, small repeaters) information is managed by each production headquarters operation team, and repeater information (location) on a text or map using the local call quality control region server 22 Information required). In addition, the centralized call quality management integrated server 21 collects the repeater information of each production headquarters at least once a day (when needed by the user) to form a DB in order to integrate and manage the repeater information of the whole country.

The call quality management server 20 analyzes the measurement data in the wireless network section and the configuration, communication, and disability information in the wired network section together, and manages the measurement data and the configuration, communication, and disability data.

The central server 21 of the call quality management server 20 has a function of managing measurement data stored in the database 23 by region / date / target for measurement data management, and is required from the local server 22. There is a function to collect data automatically or manually and provide the data. Here, the collection / providing cycle is performed once a day. In addition, when the measurement data is converted into an index (measurer, measuring area), and later wants to see the call quality data in any area, if you input only the name of the region can be imported (import) the measurement files of the area.

The call quality management server 20 manages base station configuration information by manufacturer, region, and date, and may generate a base station information file in a text format in a notepad, word, excel, and the like.

In addition, the call quality management server 20 has a function of converting the communication and failure data from the operation and maintenance center 30 into a form necessary for call quality management and converting it into a DB, and the communication and failure situation by manufacturer / It can be managed by region / date / time. In this case, the communication and failure data may also generate a base station information file in a text format in Notepad, Word, Excel, and the like. When displaying DB data on MAP, it can be selected by administrative area, place name, range.

2 is a flowchart illustrating a method for managing call quality according to the present invention.

As shown in Figure 2, the call quality management method according to the present invention, first collects the measurement data (including quality information, coordinate information, time information) measured in the measuring device 10 in real time (201), and System information such as CDMA communication information, failure information, configuration information (base station information, repeater information, etc.) is collected from the maintenance (OAM) center 30 (202).

Thereafter, the collected measurement data (quality information, coordinate information, time information) and system information (CDMA communication information, failure information, configuration information (base station information, repeater information)) are databased (203). In this case, the data size can be reduced by storing the CAI message of the L-File of the measured data only within 30 seconds before and after the point of failure of incoming / outgoing call and the call disconnection. It is possible to determine the cause of the incoming call failure and the cause of the call disconnection. And, the communication information is used to analyze the deterioration of call quality due to the increase of traffic.

Next, analyze the measurement data (quality information, coordinate information, time information) and system information (CDMA communication information, failure information, configuration information (base station information, repeater information)) stored in the database to determine the call quality status and call quality The cause of the failure is identified (204). At this time, it is possible to determine whether the call quality deterioration is caused by the radio environment or system failure in the wired network. This is performed by analyzing the measurement data in the wireless network section and the configuration, communication and failure information in the wired network section together. At the same time, it is possible to identify the cause of poor call quality at the same time.

Next, the analysis result is displayed on a map, or a chart, a sheet, or a printout is output (205). Of course, the call quality data stored in the DB can be extracted and output to the operator when requested by the operator.

As described above, the present invention can grasp the current state of the call quality and analyze the cause of poor quality of the call.

The present invention has a great effect in terms of the cause of call quality deterioration, call quality improvement activities (operation), and production equipment investment (engineering).

First, in view of cause of call quality deterioration, the present invention can effectively cope with call quality deterioration due to temporary obstacles by collecting wired and wireless communication environment information related to call quality. In addition, it is possible to analyze the deterioration of the call quality according to the increase of traffic through collecting the communication information. And, through the analysis of the CAI message, it is possible to determine the cause of the call failure and the cause of the call disconnection. In addition, by extracting and storing a large amount of CAI message within 30 seconds before and after the call failure and call disconnection, it is possible to increase the convenience of quick cause analysis and data management.

Second, in terms of call quality improvement activities, the present invention can immediately solve a call failure due to a system failure by real-time failure data linkage. In addition, the base station PLD analysis function enables efficient base station setting error correction. In addition to the sector management in the base station information, it is easy to improve the radio wave environment by managing the direction of the antenna main lobe. After the improvement activity, the statistical report output function can be used to directly compare before and after improvement, and a virtual base station to be added for improving call quality can be put on the map.

Third, in terms of production equipment investment, the present invention enables efficient facility investment by analyzing the relationship between communication information and call quality.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the present invention can collectively grasp the current state of call quality and at the same time have an effect of accurately analyzing the cause of poor call quality.

Claims (8)

In the call quality management method in the call quality management system, A first step of the call quality management server collecting call quality measurement data through a meter; A second step of the call quality management server collecting system data including communication information, failure information, and configuration information from an operation and maintenance (OAM) center; A third step of databaseting and managing the call quality data and the system data in the call quality management server, analyzing the measurement data and the system data to identify a current state of call quality and to identify a cause of poor call quality; And A fourth step of informing the operator of the analyzed result according to the analysis result of the third step Call quality management method of a wireless communication network comprising a. The method of claim 1, The fifth step of extracting the call quality data stored in the database and outputting it to the operator when requested by the operator Call quality management method of the wireless communication network further comprising. The method of claim 1, The wireless section (CAI) message of the measurement data, In order to reduce the data size, the call quality management method of the wireless communication network, characterized in that only the portion within a predetermined time before and after the point where the incoming and outgoing call and the call is disconnected is extracted. The method of claim 1, The configuration information, A method for managing call quality in a wireless communication network, comprising base station information and repeater information capable of managing the direction of antenna main lobe in addition to conventional sector management. The method according to any one of claims 1 to 4, The call quality management server, Integrated management of call quality measurement data managed by central and region, maintaining up-to-date call quality measurement data between central and regional servers, identifying cause of poor call quality in wireless network section and identifying cause of call quality in wired section Call quality management method of a wireless communication network, characterized in that to collect the communication information and the failure information to enable this. The method according to any one of claims 1 to 4, The call quality management server, It collects wired / wireless communication environment information related to call quality, analyzes call quality deterioration according to traffic increase through collecting communication information, and can identify the cause of call failure and call disconnection through analysis of wireless section (CAI) message. A method for managing call quality in a wireless communication network, comprising extracting and storing a large amount of CAI messages within a predetermined time (preferably 30 seconds) before and after a call failure and disconnection. In the call quality management system having a processor for call quality management of a wireless communication network, A first function of the call quality management server collecting call quality measurement data through a meter; A second function of the call quality management server collecting system data including communication information, failure information, and configuration information from an operation and maintenance (OAM) center; A third function of databaseting and managing the call quality data and the system data in the call quality management server, analyzing the measurement data and the system data to identify a current state of call quality and to identify a cause of poor call quality; And A fourth function of notifying the operator of the analyzed result according to the analysis result of the third function A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 7, wherein A fifth function that extracts the corresponding call quality data stored in the database and outputs it to the operator when requested by the operator A computer-readable recording medium that records a program for further realization.