KR20020043519A - Method for analyzing processor of cdma system by base station manager system - Google Patents

Abstract

PURPOSE: A method for analyzing CDMA system processor loads in a BSM(Base Station Manager) is provided to predict the overload of a BTS(Base Transceiver Station) or a BSC(Base Station Controller) and to previously prevent it. CONSTITUTION: If a BSM is driven(200), a processor load analysis system collects status information from various processors(202). If processor status information is collected, a processor load check part and a system traffic check part respectively check processor loads and system traffics every hour(204). Then the processor load check part and the system traffic check part record processor loads in a load information DB by equipments, hours and traffics(206). A processor load prediction part analyzes a shift of processor loads, based on the data recorded in the load information DB(208), and estimates a hereafter floating value for the load of each processor(210). A processor overload alarm part counts an estimated processor overload time. If the estimated processor overload time comes, the processor overload alarm part outputs a processor overload alarm(212).

Description

CDMA system processor load analysis method of base station management system {METHOD FOR ANALYZING PROCESSOR OF CDMA SYSTEM BY BASE STATION MANAGER SYSTEM}

The present invention provides a method for analyzing a processor load of a CDMA system of a base station management system by recording a processor load trend by device and time and summarizing processor load by device in a code division multiple access (CDMA) system. If the normal function cannot be performed due to abnormal operation of processor of the station system or excessive call processing, check the status information of the processor, load and system traffic information by time, and analyze and predict the processor load based on this. The present invention relates to a CDMA system processor load analysis method of a base station management system capable of preventing a processor overload.

In a digital mobile communication system, a base station and control station system is a basic system for providing a stable service to a plurality of subscribers at all times. The base station and control station system includes a plurality of processors that perform traffic service call processing (including handoff) and operational maintenance functions. In such a base station and control station system, processors may behave abnormally, the number of times of access to a common database may be increased, the number of times of use of IPC (Inter Processor Communication) may be increased, the operation preservation function may be excessive, or call processing may occur. Excessive overloads the system.

In the conventional method of controlling the overload condition generated in the base station and the control station in this way, the current processor usage ratio is over the class threshold, and the overload limit class is compared with the current processor usage ratio with the class. When the control function is set, the overload limit function of the processor corresponding to each overload limit level is performed.

However, such a conventional overload control method does not minimize the suppression of the overload increase of the processor because it does not eliminate other causes of overload, such as an increase in the number of common database accesses and an increase in the number of IPCs, in addition to the call processing function. Therefore, there was a problem in extending the call processing service downtime.

In addition, in order to solve the above problems, the limit function of each processor is set in advance for each overload class, and if the processor usage ratio exceeds the set overload threshold for each class due to abnormal operation of the processors or excessive call processing during system operation. In addition, by limiting the operation of the processor by the degree of overload according to the importance, the system can be restored to the normal state in a short time.

However, this improved conventional overload control method can also shorten the time required to quickly find the cause of overload and to recover the system, but it is not possible to predict the cause of overload and find the cause before overload occurs. There was a limit.

Accordingly, an object of the present invention for solving the above problems is to provide a CDMA system processor load analysis method of a base station management system that can predict the overload of the base station and control station system, and can prevent this in advance.

1 is a diagram showing the configuration of a CDMA system to which the present invention is applied;

2 is a block diagram of a processor under control of a base station management system to which the present invention is applied;

3 is a block diagram of a CDMA system processor load analysis apparatus of a base station management system to which the present invention is applied;

4 is a control flowchart illustrating a CDMA system processor load analysis method of a base station management system according to an exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: mobile station (MS) 20: base station (BTS)

21: base station interface 22: base station control processor (BSP)

23: digital unit (DU) 24: time-frequency unit (TFU)

25: Radio Frequency Unit (RFU) 30: Control Station (BSC)

31: control station interface 32: alarm control processor (ACP)

33: call control processor (CCP) 34: sector interface processor (SIP)

35: sector vocoder processor (SVP) 40: mobile switching center (MSC)

42: home location register (HLR) 44: visitor location register (VLR)

50: gateway MSC (GMSC) 60: public communication network

100: base station management system (BSM) 110: base station manager terminal

120: processor load analysis device 130: processor load information DB

In accordance with another aspect of the present invention, there is provided a code division multiple access (CDMA) system, comprising: collecting time-based state information of each processor from a plurality of control stations managing a plurality of base stations; Checking the loads of the processors from the state information by time, storing the loads of the processors by time and equipment, and checking the system traffic of the CDMA system at each time of checking the loads of the processors; Analyzing the trend of the load of each of the processors to predict the load of each processor, if the processor load prediction result, overload is predicted, outputting a processor overload alarm, and the system traffic and the time of the CDMA system Compare the hourly load of each processor to the system traffic CDMA system processor of the base station management system characterized in that the process of analyzing the correlation between the pick and each processor, and to reduce the load of the processor having a high correlation according to the correlation when system traffic Provide a load analysis method.

In addition, when the overload is predicted as a result of the processor load prediction, a process of transmitting a processor overload alert to a control station to which the processor belongs, and analyzing load trends of the respective processors to predict load of each processor, and then The method may further include outputting a trend analysis of the load of each processor and outputting the estimated load information to the summary and analysis information indicator of the manager terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as much as possible even if they are displayed on different drawings. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

Hereinafter, the CDMA system processor load analysis method of the base station management system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a mobile station (MS), a base station (Base Transceiver Station, BTS), a control station (Base Station Controller, BSC) and a base station management system (Base Station Manager, BSM) that controls and manages their operations. Authentication and registration and systems of radio base station subsystems, radio switching and management subsystems that are roughly divided into mobile switching centers (MSCs) and gateway MSCs that switch to the Internet or public telecommunication networks, and devices of mobile stations. It shows a brief overview of the structure of the mobile communication system, including the operation and management subsystem, which is divided into general operations and management centers.

As shown, a base station subsystem comprising a base station management system 100 for a CDMA system processor load analysis method according to the present invention includes a mobile station 10 and a base station 20 and one or more base stations 20 that perform wireless communication. And a base station management system 100 that controls and manages a plurality of control stations 30 controlling one or more base stations 20. Hereinafter, a description will be given of the switching center 40 for switching signals between the base stations 20 controlled under different control stations 30, and the gateway switching center and the international switching center connecting to an external public telephone network or another mobile communication network. Omitted because it is irrelevant to.

Referring to FIG. 1 in detail, the CDMA system illustrated in FIG. 1 includes a mobile station 10, a base station 20, a control station 30, a base station management system 100, an exchange station 40, and a home location register. 42), VLR (visited Location Register) 44, GMSC 50, public communication network (PSTN, ISDN, PDN, INTERNET) (60).

The mobile station 10 may be composed of a wireless transceiver, an antenna, and a control device to perform a voice service and a packet data service while moving.

The base station 20 is controlled by the control station 30, and the base station 20 and the control station 30 are managed by the base station management system 100. The control station 30 is connected to the switching station 40 so that the mobile station 10 can make a call with the other party.

The switching center 40 is composed of a connection with the control station 30, information and authentication for the subscriber, and related additional equipment, and plays a role of making a connection with another network. In addition, the switching center 40 handles calls and calls from the control station 30, and the public telephone network through the trunk line with a central control function so that all the control stations 30 can be efficiently operated. It can be connected to the switching center of the Public Switching Telephone Network (PSTN), and is composed of a control unit, a call path part and a peripheral device, and also has a billing data retrieval function for a call that has completed maintenance and call. The switching center 40 registers with the HLR 42 and the VLR 44 to keep track of the subscriber's moving position in the system. The HLR 42 is a database that stores basic subscriber information such as personal information, subscription service type, terminal type, and location information of the subscriber, and the VLR 44 is a subscriber to reduce frequent inquiries and updates of the HLR 42. It is a database in the form of RAM (Random Access Memory) that temporarily stores the subscriber's simple phone number, terminal information, location information, etc. in a base station or exchange that manages an area in which the location is located.

The mobile station 10, the base station 20, the control station 30 and the switching station 40 are connected to each other by a call line and a data link, and the CDMA system of this connection structure is a pair when the mobile station 10 is talking. Although the transmission / reception wireless channel is used, the channel is not fixed to any specific frequency channel and can be changed to another channel according to the movement of the terminal during the call, so that any channel assigned to the region can make a call to any channel.

The base station management system 100 performs operations and maintenance functions of the base station 20 and the control station 30. In particular, the base station management system 100 checks the state of various processors of the base station 20 and the control station 30 of the CDMA system according to the processor load analysis method of the present invention, and analyzes the load to predict and load the processor. Prevent overload.

2 is a block diagram of a processor under control of a base station management system to which the present invention is applied, and FIG. 3 is a block diagram of a CDMA system processor load analysis apparatus of a base station management system to which the present invention is applied.

As shown, the base station management system 100 manages the base station 20 and the control station 30. The control station 30 is a control station interface unit 31 for communication with the base station management system 100 and the base station 20, a call processing processor (Call Control Processor, CCP) performing a call processing function and operation maintenance function 33), a SIP (Selector Interface Processor) 34, a SVP (Selector Vocoder Processor) 35, and an Alarm Control Processor (ACP) 32 are provided.

The base station 20 is a base station interface 21 for communication with the control station 30, a BTS (BTS Control Processor) 22 for performing overall control in the base station and various control under the control of the BCP 22 The unit includes a digital unit (DU) 23, a time frequency unit (TFU) 24, and a radio frequency unit (RFU) 25.

The ACP 32, CCP 33, SIP 34, SVP 35 and BCP 22 of the base station 20 of the control station 30 are processors of the base station management system 100 according to the present invention. It is a processor that downloads a program for performing a corresponding operation according to a load analysis method, and is thus controlled by the base station management system 100, and the DU 23, TFU 24, and RFU of the BTS 20. Numeral 25 shows an important unit constituting the base station 20.

The base station management system (hereinafter, abbreviated as 'BSM') 100 includes a manager terminal 110, a processor load analyzing apparatus 120, and a processor load information DB 130 as shown in FIG. 3.

The manager terminal 110 is a summary / analysis information indicator that periodically searches for signals currently generated from the processor load analysis device and displays them to the manager. The manager terminal 110 provides a manager with a graphical interface, and provides the manager with a base station or control station and It provides the ability to select specific processors.

The processor load analyzing apparatus 120 checks loads of various processors of the base station 20 and the control station 30 and stores them in the processor load information DB 130, and based on this, predicts the load of the processor. Prevent overload beforehand. The processor load analyzing apparatus 120 may include a processor state information inspector 122 that inspects state information of various processors of the base station 20 and the control station 30, and a processor load inspector 123 that checks the load of the various processors. A system traffic checker 124 for inspecting system traffic related to the loads of the various processors, a processor load predictor 121 for analyzing and predicting a load of the processor based on the checked data, and the estimated processor load If the overload is predicted, it is composed of a processor overload alarm unit 125 to alert the administrator and the processor.

At this time, processor load information generated from each of the checker and the predictor is recorded in a corresponding DB of the processor load information DB 130.

The processor summary DB 131 for each device of the processor load information DB 130 is a database in which information about the state information, load, system traffic correlation, load trend, and load prediction of the processors is arranged according to the processor for each device. to be. The processor load DB 132 for each device / time band of the processor load information DB 130 is a database that records information on a time zone load of the processor for each device for predicting the load of the processor by analyzing the load trend. The processor load DB 133 for each traffic is a database that records information on the load of the processor according to the system traffic for analyzing the load according to the system traffic to predict a more accurate load.

4 is a control flowchart illustrating a CDMA system processor load analysis method of a base station management system according to an exemplary embodiment of the present invention. Hereinafter, a method of analyzing a CDMA system processor load of a base station management system according to the present invention will be described in detail with reference to FIGS. 3 and 4.

The processor load analyzing apparatus of the base station management system 100 managing a plurality of base stations and a plurality of control stations managing a plurality of base stations, when the base station management system is driven in step 200, is managed by a predetermined time in step 202. Collect status information from various processors. This is performed by the processor state information inspection unit 122 of FIG. 3 through the exchange of control signals and data with various processors of each base station 20 and the control station 30.

When the processor state information of step 202 is collected, the processor load inspecting unit 123 and the system traffic inspecting unit 124 of FIG. 3 inspect the processor load and the system traffic for each time at the same time in step 204. In step 206, the load of each processor is recorded in the processor load information DB 130 for each device, time zone, and traffic.

The processor load predicting unit 121 of FIG. 3 analyzes the trend of the processor load based on the data recorded in the processor load information DB 130 in step 208. Accordingly, the future variation of the load of the processors of each equipment is predicted, and accordingly, the processor overload alarm unit 125 of FIG. 3 counts the overload prediction time of the processor. Accordingly, when the overload prediction time is reached in step 212, the processor overload alarm is output.

The processor overload alert is displayed to the administrator through the manager terminal 110 and automatically sends an overload alert to the processor. Accordingly, the processor having received the overload prediction alarm operates in the overload suppression mode performed when the overload occurs, thereby preventing the worst case in which the overload occurs.

After that, the processor load predicting unit 121 of the processor load analyzing apparatus 120 included in the base station management system 100 according to the present invention checks the change in processor load according to the system traffic in step 216. Analyze the correlation of processor load.

Accordingly, when system traffic occurs in step 218, the system traffic is quickly eliminated by controlling the load of a processor having a high correlation with the traffic generated in step 220.

In addition, after estimating the load of each processor by analyzing the trend of the hourly load of each of the processors, the processor load estimating unit 121 transmits the summary and analysis information to the indicator of the manager terminal 110 in the hourly load of each processor. The result of the trend analysis and the predicted load information of is outputted to the summary and analysis information display of the manager terminal.

On the other hand, in the detailed description of the present invention has been described with reference to specific embodiments, of course, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention analyzes the load of the base station and the control station system to predict the overload, thereby solving the problem of extending the call processing service downtime by not eliminating the cause of the overload, and preventing the occurrence of the overload before the overload occurs. It has the advantage of being able to predict, find the cause and prevent it.

Claims (3)

In a code division multiple access (CDMA) system, Collecting hourly state information of each processor from a plurality of control stations managing a plurality of base stations; Checking the load of each processor from the state information of each processor over time; Storing the load of each processor by time and by equipment; Inspecting system traffic of the CDMA system every time the load of each of the processors is checked; Estimating load of each processor by analyzing trends of loads of each processor over time; Outputting a processor overload alert when an overload is predicted as a result of the processor load prediction; Analyzing the correlation between the system traffic and each of the processors by comparing the hourly system traffic of the CDMA system with the hourly load of each of the processors; CDMA system processor load analysis method of the base station management system, characterized in that the system traffic, the process of controlling to reduce the load of the highly correlated processor according to the correlation. The method of claim 1, And a process of transmitting a processor overload alert to a control station to which the processor belongs if the overload is predicted as a result of the processor load prediction. The method of claim 1, Analyzing the trends of the loads of each of the processors to predict the load of each processor, and further comprising the step of analyzing the trends of the load of the processors of each processor and outputting the estimated load information to the summary and analysis information display of the manager terminal CDMA system processor load analysis method of a base station management system, characterized in that.