KR0144787B1 - A load box for the call control process of the cdma mobile system - Google Patents

Abstract

The present invention can generate the CPU load of the CCP appropriately without a call simulation environment through the method of generating and destroying the unit processor by comparing the current CUP load status with the desired load ecology to generate an arbitrary load on the CCP of the CMS. It's about a load box.

Description

Method for generating CPU load of CCP for simulation test in CMS system that controls overload according to CPU load.

1 is a schematic diagram of a base station controller (BSC) of a general CDMA mobile system (CMS) to which the present invention is applied.

2 is a load box load regulation function flow chart.

The present invention is an arbitrary method for simulating the CPU load of a call control processor (CCP) which is a processor that processes a call in a system CMS (CDMA Mobile System) configured with a code division multiple access (CDMA) scheme. It relates to a method of generating a load of.

In general, the CMS system is largely composed of a mobile station (MS), a control station (BSC) and a mobile station service switching center (MSC), as shown in the accompanying FIG.

At this time, the function of the mobile station service switching center (MSC) is responsible for connecting to other networks, such as operation and maintenance, call processing, PSTN / ISDN with a plurality of control stations.

In addition, the control station operating maintenance device (BSM) performs the functions of operation and maintenance of the control station (BSC) and the base station (BTS), in particular, all the file loading information for the control station (BSC) and the base station (BTS) It stores and manages and provides relevant information when loading a file. In general, one BSM manages 32 control stations (BSCs), and one control station (BSC) area. There are 32 base stations (BTSs) within.

Each control station (BSC) is composed of a call control processor (CCP), a selector matching processor (SIP), a selector vocoding processor (SVP), and the selector vocoding processor (SVP). A processor (SIP), the selector matching processor (SIP) dependent on the call control processor (CCP), and the call control processor (CCP) dependent on the control station operating maintenance device (BSM) in a hierarchical tree structure form. Consists of.

In addition, the base station communication processor (BCP) provided in the base station (BTS) also depends on the call control processor (CCP).

At this time, in the CCP, application programs such as call processing programs, operation and maintenance programs are loaded, and they occupy the CPU by performing certain tasks.

Therefore, in the CCP, an overload control block is loaded and executed together to prevent the applications from excessively occupying the CPU.

The overload control function in the CCP is controlled by dividing the CPU load, which increases as a call is generated, into three classes.

The first is the MINOR class, the second is the MAJOR class, and the third is the CROTICAL class, which suppresses calls appropriately for each class and induces the CPU to become overloaded and transition to an inoperable state.

In other words, when the CPU load reaches the MINOR level, it first lowers the load by restricting some functions of operation maintenance and suppressing calls from mobile subscribers.

When the load continues to increase and reaches the MAJOR state, it suppresses some of the incoming calls to the mobile subscriber, and when the load reaches the CRITICAL state, the incoming signal is suppressed to lower the load.

However, since the conventional method of checking whether the conventional overload control method operates correctly uses the actual system application method, there is no problem that the reliability of the system is degraded because there is no need to verify or refer to the exact load amount when designing the system. Occurred.

An object of the present invention for solving the above problems is a means for testing whether the conventional overload control function is operating properly, CPU load of the CCP to check the state management block by artificially changing the system by intentionally generating a load To provide a method for generating a.

A characteristic of the present invention for achieving the above object is a method of generating a load for simulation in a CCP which is a call processing processor of a CMS, the load rating for a predetermined period for a load box manufactured to generate any load The first step of maintaining the load level, the second step of searching for the load rating of the CPU at a predetermined time interval and the current load rating found in the second step and the load rating set in the first step It includes a third process of creating and destroying a unit process by comparing the two.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

First, in the present invention, a means for performing the proposed method is called a load box, which will be briefly described as follows. A load box is software loaded in the CCP. The call processing function is designed to generate a load without a call simulation environment in which a call processing function processes a call from a number of mobile subscribers or wired subscribers to increase the load on the CPU.

2 is a flowchart of a load box load regulation function according to the present invention.

In step S101, when the load box is loaded into the CCP and starts to be executed, first, the overload rating value set in the processor lode date (PLD) is read and set as its initial variable, and then the rating maintenance value that the load box intends to keep intentionally. Is initialized.

At this time, the variable set through the initialization process of step S101 is used as a reference of an index to increase or decrease the load later.

In addition, the class maintenance value initialized in step S101 is because the load box places a constant load on the CPU for a predetermined time, and the state management function detects such a state, reports it to the BSM, and performs a load control function. .

Therefore, we set the rating trajectory that the CPU should flow as an internal variable.

In addition, the grade maintenance trajectory is tabulated so that the load control function of the load box maintains the table as an index.

When the operation of step S101 as described above is completed, that is, after initializing the variable, the load regulation function timer is started in step S102.

Thereafter, in step S103, a message is received from a cyclic job of CROS, and in step S104, a load adjustment timer is set so that the timer is repeated every three seconds.

When the timer is set in step S104, the flow advances to step S105 to read the load state of the CPU at every cycle of each timer interval. In step S106, it is selected whether to increase or decrease the load in comparison with the grade keeping trajectory table.

On the other hand, after the step S106, in combination with the operations from the step S104 to the step S106, in step S107, a rating maintenance timer for maintaining the rating for a predetermined time is performed in parallel.

At this time, the setting timer in step S107 is set to be repeated every 25 seconds, and in step S108, the level to be maintained by the CPU is updated in every period of the timer.

In other words, the class maintenance timer used 25 seconds so that the status management function was longer than 10 seconds for reading the load status of the CPU. The load control timer was used to adjust the load at a shorter time interval than the status management function. Set at second intervals.

The load rating maintenance method to be performed by the load control function of the load box according to the current CPU load status and the load rating to be intentionally maintained is shown in the following table.

As shown in the table above, the increase or decrease of load is divided into three grades according to the current status and maintenance grade value. It was to quickly enter the desired grade by performing.

To change the load was to create or destroy a unit processor that did a small amount of work.

The CPU load occupied by the unit processor was implemented to about 1% through experiments.

According to the present invention as described above, it is possible to effectively test the state management function by generating the CPU load in an appropriate state without going through a method such as call simulation outside the CPU.

Claims (1)

A method of generating a load for simulation in a CCP, a call processing processor of a CMS, comprising: a first process of maintaining a load rating for a predetermined period of time with respect to a load box manufactured to generate an arbitrary load; A second process of searching for a load class of a CPU and a third process of generating and destroying a unit processor by comparing a current load class found in the second process with a load class to be maintained among the load classes set in the first process CCP and CPU load for the simulation test in the CMS system that controls the overload according to the CPU load, characterized in that it comprises a process.