KR20000050340A - Performance analyzing method in CDMA wireless network and system therefor - Google Patents

Abstract

PURPOSE: A method for analyzing function of a Code Division Multiple Access(CDMA) radio network is provided to know a analysis result visually, by displaying the analysis result as a quadratic graphic on geography and topography of a related base station supplied by a geography information system, through analysis of a radio network function to a base station of the CDMA radio network and traffic data of the base station by sector. CONSTITUTION: A method for analyzing function of a Code Division Multiple Access(CDMA) radio network with a Network Management System(NMS) storing traffic data, comprises the steps of: receiving topography data and traffic data of a base station from a data receiver; having the topography and traffic data from the NMS; analyzing function of the CDMA network by base station and by sector, by utilizing the topography and traffic data; and displaying the function analysis data visually, by mapping a related geography and topography information supplied by a geography information system, which supplies the information of an area the base station locates.

Description

Performance analyzing method in CDMA wireless network and system therefor}

The present invention relates to network performance analysis, and more particularly, to a method and system for analyzing CDMA wireless network performance using a network management system (NMS) and a geographic information system (GIS).

Performance in the wireless network includes the efficiency and call quality of the wireless network when making a call over the wireless path. The efficiency refers to the traffic accommodated by the actual base station with respect to the maximum amount of traffic that can be accommodated by each base station, and the degree to which the service request of the subscriber is accommodated. Since a lot of resources are required to build and operate a CDMA wireless network, it is very important to reduce cost by maximizing resource efficiency for mobile communication service providers. In addition, in order to provide high quality call quality using CDMA technology, traffic generated from each base station by a subscriber must be analyzed and appropriate measures are taken accordingly. For example, for base stations in high-traffic areas, increase the capacity required by subscribers such as reinforcement installation of base stations in the adjacent area, frequency allocation (FA) expansion of existing base stations, or expansion of channel card. All must be accepted. On the other hand, for base stations in areas with little traffic, measures such as relocation of base stations or relocation of FA (Frequency Allocation) or channel card should be operated effectively within given resource limits. This increases the efficiency of the wireless network and at the same time provides good call quality. For the call quality and the efficiency of the wireless network, the operator should analyze the actual traffic generated from the wireless network that is already established and operated and optimize the wireless network based on the analysis result to increase the call quality and maximize the efficiency of the wireless network.

However, in general CDMA wireless network performance analysis, traffic generated for each base station is represented as a one-dimensional graph or table for each base station, so that individual traffic for the base station can be analyzed, but the overall traffic distribution cannot be grasped in two dimensions. In other words, it is not easy to distinguish the areas with high traffic and the areas with low traffic. Therefore, the review data on the relocation of the base station considering the overall traffic distribution cannot be presented in three dimensions. In other words, it is not easy to locate the location where the traffic is concentrated, and it is very inconvenient for efficient management of resources and immediate service improvement because the location of the low performance base station is not known.

The technical problem to be achieved by the present invention is to solve the above-mentioned shortcomings of the one-dimensional CDMA wireless network performance analysis, CDMA wireless network performance analysis method that can display the analysis results in two-dimensional graphics with geographic and terrain information and To provide a system for him.

Figure 1 shows the overall CDMA wireless network to which the CDMA wireless network performance analysis system according to the present invention is applied.

2 is a block diagram showing the configuration of a performance analysis system of a CDMA wireless network according to the present invention.

3 is a flowchart illustrating the entire process of performing CDMA wireless network performance analysis when performed according to an example of the present invention.

4 illustrates an example of an image displayed according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a step in which a data collector receives traffic data and base station shape information from an NMS to perform performance analysis of a base station and a sector.

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

100: CDMA wireless network performance analysis system, 110: NMS database

120: base station, 200: data collection unit

210: geographic information system 220: data analysis / display unit

230: user interface unit

The CDMA wireless network performance analysis method according to the present invention for solving the above technical problem, in the method for analyzing the performance of the CDMA wireless network having a network management system (NMS) that stores at least traffic data, the data Receiving base station shape data and traffic data from a collecting unit; Importing shape data and traffic data of a base station from the network management system (NMS); Analyzing the performance of the CDMA communication network for each base station and sector using the base station shape data, traffic data, base station shape data, and traffic data; And visually mapping the performance analysis data to corresponding geographic and topographical information provided by a geographic information system providing geographic and topographical information of the region where the base station is located.

According to the present invention for solving the above technical problem, CDMA wireless network performance analysis system, Data collection unit for obtaining the shape data and traffic data of the base station from the network management system (NMS); A geographic information system for providing geographic and topographical information of the area where the base station is located; Receive base station shape data and traffic data from the data collection unit and analyze the performance of CDMA communication network by each base station and sector, and visually display the performance analysis data by mapping the corresponding geographic and topographic information provided by geographic information system. It characterized in that it comprises a data analysis / display unit.

The performance analysis data in the analysis / display unit is characterized in that the performance analysis data for the base station and the sector is displayed in a color distinguishable at a corresponding position on the geography and the terrain provided by the geographic information system.

And the performance analysis items of the CDMA wireless network, it is preferable to include the load rate, Erlang, traffic rate, completion rate and truncation rate.

The wireless network performance analysis system further includes a user interface that receives a user's requirement for performance analysis and delivers the data to the data analysis / display unit, wherein the data analysis / display unit is inputted from the user interface unit. According to the present invention, the corresponding performance analysis data is displayed for each performance analysis item.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The present invention uses a computer system in hardware, and geographic information system (GIS) in software to process geographic and topographical information on the service area of a CDMA wireless network, and to manage a network management system ( It receives the traffic data and the shape of the base station of the service area from the Network Management System (NMS) and analyzes the traffic data of the base station of the corresponding area and displays the performance analysis result on the computer monitor.

FIG. 1 illustrates an overall CDMA wireless network to which a CDMA wireless network performance analysis system according to the present invention is applied, and is largely composed of a CDMA wireless network performance analysis system 100, an NMS database 110, and a base station 120. The CDMA wireless network performance analysis system 100 may be implemented using a computer system, and is physically connected to the NMS database 110. The NMS database 110 is a database system for wireless network management. The NMS database 110 is physically connected to the base station 120. The NMS database 110 stores shape data of each base station and collects traffic generated by each base station by date and time. . The base station 120 is a device that provides a service to a subscriber through a wireless path in a wireless network.

2 is a block diagram illustrating a configuration of a performance analysis system of a CDMA wireless network according to the present invention. The data collection unit 200, the geographic information system 210, the data analysis / display unit 220, and the user interface unit ( 230).

The data collection unit 200 obtains the shape data and traffic data of the base station from the network management system (NMS) 240. The NMS 240 is a kind of database system that manages not only traffic of a wireless communication network and resources of the wireless communication network but also events for calls occurring in the wireless communication network. The base station shape data is stored for each base station by using the base station ID as a separator, and includes installation information on the base station. Base station ID, coordinate of the location where the base station is installed, number of sectors, number of FA (Frequency Allocation), number of channel cards. The traffic data is stored for each sector of the base station by using the base station ID and the sector ID as a separator, and includes information on the call generation amount and the call quality for the corresponding sector. Base station ID, sector ID, date, time, total number of attempts, average call time, number of traffic, number of completed, cut number.

In the present invention, the geographical and topographic information of the area serviced by the CDMA wireless network is required. Preferably, a geographic information processing system for managing and maintaining the geographic and topographical information is required. The geographic information system 210 provides geographic and terrain information of the area where the base station is located. The geographic and topographical information includes topographical altitude, geographic type, geographic base conduction, and road / administrative zone information. The geographic information processing system 210 is usually composed of a geographic information processing engine and a database. The geographic information processing engine manages geographic and topographical information data, enables various digital maps and geographic and topographical data operations, and geographic and topographical information are stored in a database.

The data analysis / display unit 220 receives base station shape data and traffic data from the data collection unit 200 and analyzes the performance of the CDMA communication network by each base station and sector by using the base station shape data and traffic data, and analyzes the analysis result of the base station ID and the sector ID. Is stored as a delimiter for each sector of the base station and its contents are as follows. Base station ID, sector ID, Erlang, load rate, traffic rate, completion rate, truncation rate. The performance analysis data stored for each sector of the base station is visually displayed by mapping the corresponding geographic and terrain information provided by the geographic information system 210. In response to the command input from the user interface unit, the corresponding performance analysis data is displayed for each performance analysis item.

The user interface unit 230 receives a user's requirement for performance analysis and delivers it to the data analysis / display unit.

3 is a flowchart illustrating a process of performing CDMA wireless network performance analysis when performed according to an example of the present invention. After receiving performance analysis items and execution command from the user interface, the geographic information system (GIS) is read from geographic information system (GIS). It is treated as a system and includes geography, geography type, administrative boundary, road and river. The shape information of the base station installed in the service area is read from the NMS 240 through the data collection unit 200 (step 310). The shape information of the base station includes the ID of the base station, the coordinates of the base station location, the number of sectors, the FA number, The number of channels. Then, the traffic data generated in the wireless network and stored in the NMS database is read (step 320). At this time, only the corresponding traffic data is read by specifying a desired date and time. The items of traffic data are as follows. Base station ID, sector ID, date, time, total number of attempts, average call time, number of traffic, number of completed, cut number.

Then, the performance of each base station and sector is analyzed (step 330). The performance analysis result is stored for each sector of the base station as follows. Base station ID, sector ID, Erlang, load rate, traffic rate, completion rate, truncation rate. Here, Erlang is a unit representing an average number of lakes running simultaneously in the sector of the base station for one hour.

Erlang = (total number of lakes * average talk time) / 3600

After obtaining the Erlang, a base station proper Er acceptable to the base station is obtained for each base station. The method of obtaining is as follows. The number of channels corresponding to each base station ID is read from the base station shape data. In the Erlang B table, the Erlang value corresponding to the number of channels read by referring to the GOS (Grade of Service) and the corresponding base station ID predetermined in the Erlang B table is mapped to the appropriate Erlang of the corresponding base station. The sector proper ice is a value obtained by dividing the base station proper ice of the base station by the number of sectors of the base station read from the base station shape data. The formula for calculating load factor, traffic rate, completion rate, and truncation rate is as follows.

Load factor = Erlang / sector titrated Erlang

Traffic rate = (traffic lake / total visibility lake) * 100

Completion Rate = (Complete Lake / Total Views) * 100

Cutting Rate = (Cutting Lake / Completed Lake) * 100

Finally, the performance analysis result values are displayed to the user in color through a monitor (step 340). The base station shape data refers to the coordinates of the base station ID and the location where the base station is installed, and the analysis result of the base station ID and sector ID in the performance analysis result. With reference to the value, the color of the line indicating the base station and sector is changed according to the size of the performance analysis result value. The base station and the sector are displayed in the color corresponding to the size of the result value by referring to the color table predetermined by the user.

4 illustrates an example of an image displayed according to an exemplary embodiment of the present invention. 400 indicates a function of the present invention, and the user selects and executes a desired function from 400 as 410 indicating a mouse position. 420 indicates geographic and topographical information such as roads, rivers, and administrative boundaries. 430 represents a base station. 440 is a sector, and the direction of the line is the direction in which each antenna installed in the base station is installed.

FIG. 5 is a flowchart illustrating each step in which the data collecting unit 200 receives traffic data and base station shape information from the NMS 240 and performs performance analysis on the base station and the sector. First, the desired date and time are selected to determine the traffic data separator J value (step 500). J is a separator that determines the date and time of the traffic data. Then, the initial value of the base station ID delimiter K and the initial value of the sector ID delimiter L are set to 1 to select the sector of the first base station stored in the traffic data (step 510). It became. Next, the selected traffic data is read (step 520), and Erlang, load rate, traffic rate, completion rate, and truncation rate are analyzed to perform performance analysis on the sector. The analysis results are stored for each sector of the base station and the format is as follows. Base station ID, sector ID, Erlang, load rate, traffic rate, completion rate, truncation rate. In step 530, if all sectors have been processed for the same base station (step 540), and if all sectors have not been processed, increase L by 1 (step 550), and perform step 520 again, If the analysis is completed, the base station performance analysis is performed (step 560). The analysis result is stored for each base station and the format is as follows. Base station ID, Erlang, load rate, traffic rate, completion rate, truncation rate. The base station performance analysis result values are the average value obtained by adding sector performance analysis result values for all sectors of the base station by each item and dividing the value by the number of sectors of the base station. If the performance analysis is performed for all base stations (step 570), if all base stations have not been processed, K is increased by 1 (step 580), and the process is performed again from step 520, and the operation ends if all base stations have been processed.

According to the present invention, by performing a wireless network performance analysis of the base station and traffic data of the sector in the base station of the CDMA wireless network by displaying the analysis results in two-dimensional graphics on the geographic and topographic information of the base station provided by the geographic information system, The analysis results can be easily visually identified.

In particular, when the load rate or Erlang analysis results are displayed, the distribution according to the traffic volume can be viewed so that the optimization of the wireless network can be efficiently performed. When the traffic rate, completion rate, or truncation rate is displayed, the performance of each base station is displayed. With the installed location, you can manage the wireless network efficiently.

Claims (5)

A method for analyzing the performance of a CDMA wireless network having at least a network management system (NMS) storing traffic data, the method comprising: Receiving base station shape data and traffic data from the data collection unit; Importing shape data and traffic data of a base station from the network management system (NMS); Analyzing the performance of the CDMA communication network for each base station and sector using the base station shape data, traffic data, base station shape data, and traffic data; And CMP wireless network performance analysis method comprising the step of visually displaying the performance analysis data mapped to the corresponding geographic and topographic information provided by the geographic information system for providing geographic and topographic information of the region where the base station is located. . In the CDMA wireless network performance analysis system, A data collection unit for obtaining shape data and traffic data of the base station from the network management system (NMS); A geographic information system for providing geographic and topographical information of the area where the base station is located; Receive base station shape data and traffic data from the data collection unit and analyze the performance of CDMA communication network by each base station and sector, and visually display the performance analysis data by mapping the corresponding geographic and topographic information provided by geographic information system. CDMA wireless network performance analysis system comprising a data analysis / display unit. According to claim 2, Performance analysis data in the analysis / display unit CDMA wireless network performance analysis system characterized in that the performance analysis data for the base station and the sector is displayed in a color distinguishable to the location on the geography and terrain provided by the geographic information system. According to claim 2 or 3, wherein the performance analysis item of the CDMA wireless network CDMA wireless network performance analysis system, including load rate, Erlang, traffic rate, completion rate and truncation rate. The method of claim 4, wherein It further comprises a user interface for accepting the user's requirements for performance analysis to pass to the data analysis / display unit, The data analysis / display unit And displaying corresponding performance analysis data for each performance analysis item according to a command input from the user interface unit.