KR100236835B1 - Method for controlling overload of vlr in pcx - Google Patents

Abstract

The present invention relates to an overload control method for each function performed by a location registration processor in a personal communication switch (PCX). The present invention relates to a location registration processor, which is a processor for providing information and registering a location of a mobile subscriber, in particular, in a personal communication switch used for mobile communication. In order to solve the problem of degrading the efficiency of service providing performance due to the control of the location registration function without any distinction between the service function and the conventional service function, the load status of the location registration processor is classified and set by the class. Accordingly, after setting the threshold calculated by different weights according to the performance functions and comparing the threshold with the number of service request attempts of the subscriber, it is possible to improve the service providing performance of the personal communication switch by determining whether to allow the service.

Description

Overload Control Method by Location Function of Location Registration Processor in Personal Communication Switch

The present invention relates to an overload control method for each function performed by a location registration processor in a personal communication switch (PCX), and more particularly, in a location registration processor which is a processor for providing information and registering a location of a mobile subscriber in a personal communication switch used for mobile communication. The present invention relates to an overload control method for classifying a generated overload condition into classes and controlling the demand of each service according to a calculated threshold value given by different weights according to the set load class.

Current communication technology can communicate freely moving anywhere regardless of the state converted from conventional wired communication to wireless communication.

According to this communication technology, communication equipment for providing mobile communication and a method of controlling the same have been in the spotlight, and as such a communication function, a switch is essential.

The exchange basically handles calls originating from all subscribers subscribed to itself, and switches to make a connection with other subscribers. At this time, the performance of the exchange is determined by how many large-capacity subscribers can be connected in a small size, and is changing from wired subscriber switching to wireless subscriber switching.

However, in using such a switch, the current overload phenomenon occurs in the exchange as the number of mobile subscribers increases exponentially.

This overload phenomenon is a factor that degrades the performance of the exchanger, and sometimes may cause the exchanger to be brought down. Here, when the overload condition is described, the overload condition refers to a condition in which a call continuously in excess of a capacity that can be handled by the exchange is continuously introduced, and if left unchecked because it is not controlled in an appropriate manner, it causes serious effects on the system. No longer allows normal call service.

For example, the processing of the widow status of the currently operating exchange is considered to be an overload if all the exchangers have a CPU share of 95% or more for a certain period of time, and the throughput of a call that can be performed is related to the function of each processor. It maintains the desired load by having to perform only as many calls as required.

However, this is a case where the location registration is not normally performed due to the overload of the system in the environment where the location registration function that registers the location of the subscriber to the network is the most frequent as in the mobile communication environment. If there is an abnormal location registration, since the service processing efficiency of the network can be greatly reduced, overload control without considering this results in a decrease in the efficiency of the system.

That is, in the mobile communication switch according to the prior art, since the overload control of the location registration processor (hereinafter referred to as LRP) is controlled irrespective of the service function of the LRP, the service function is considered in consideration of a certain level of service function. It was difficult to maintain traffic and call service volume.

An object of the present invention is to provide an overload control method for improving the performance of an exchange by efficiently handling an overload phenomenon occurring in the LRP in a personal communication exchange connecting a wireless subscriber to solve the conventional problems as described above. It is done.

In order to achieve the above object, in the present invention, when an overload occurs in the LRP that controls and manages the location registration of the wireless subscriber, the threshold value for each function is searched according to the load class of the LRP, and the outgoing subscriber information performed by the LRP according to the threshold value. By controlling the provisioning function, called subscriber information provision function and location registration function, respectively, it maintains a certain level of service function performance by service function.

In addition, the LRP performing function is far more than the location registration performance than the subscriber information providing function, and if the location registration is not performed, the overload control is performed by increasing the weight of the location registration function to solve the problem of not being able to grasp the location of the subscriber. It is designed to increase the efficiency of the system by controlling the weight of the recipient information providing function rather than providing the information.

1 is a block diagram of a personal mobile communication system using a personal communication switch to which the overload control method of the present invention is applied.

2 is a state diagram showing allowance and rejection of a call operation request according to the control method of the present invention, and

3 is a flowchart illustrating a process of an overload control method in a personal communication exchange of the present invention.

* Explanation of symbols for main parts of the drawings

10: mobile terminal 20: base station

30: base station controller 40: personal communication switch

41, 42: Access Switching Processor (ASP-W) for Wireless Subscribers

43, 44: Location Registration Processor (LRP) 45: Number Translation Processor (NTP)

46, 47: access switching processor (ASP)

48: Internal Network Processor (INP)

The position registration processor overload control method of the present invention to operate as described above, the step of classifying the load status of the position registration processor in the personal communication switch by class;

Setting a threshold for each function calculated by being weighted with respect to a function performed for each load class in the location registration processor;

When a load occurs in the personal communication switch, the overload state of the location registration processor is processed for each function by comparing the set threshold with the number of attempts of the currently requested service to determine whether to allow the service.

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

1 is a detailed block diagram of a personal communication switch applied to the overload control method of the present invention. The personal communication service system showing the state in which the exchange is used includes, with reference to FIG. 1, a plurality of mobile terminals 10 in each corresponding area;

A plurality of base stations 20 for performing wireless communication with the mobile terminal 10;

A plurality of base station controllers (1 to k) each performing wired communication with the plurality of base stations 20; And

It can be seen that it is configured to include a personal communication switch 40 connected to the base station controller 30 and performing an exchange function according to corresponding telephone numbers of calls generated from the plurality of mobile terminals 10.

In the personal mobile communication system configured as described above, when the call generated from the mobile terminal 10 passes through the base station 20 and the base station controller 30 and is input to the personal communication exchange 40, the personal communication exchange 40 If the originated call wants to connect with the subscriber in the country, it executes the connection with the domestic subscriber. If the originated call wants to connect with the subscriber in the other country, it announces the call to another personal communication switch to be connected with the subscriber in the other country.

In this case, since the call connection with the subscriber in the other country is not related, the description in the drawings and the detailed description is omitted.

Looking at the detailed block of the personal communication switch 40, this is the first wireless subscriber access switching processor (Access Switching) corresponding one-to-one correspondence with the first base station controller 30 of the plurality (1 to k) of the base station controller 30 A processor for wireless subscriber (hereinafter referred to as ASP-W) 41;

a k-th ASP-W 42 corresponding one-to-one with the k-th base station controller;

Is connected to the first ASP-W 41, a plurality of subscribers input through the first ASP-W 41, that is to control the location registration of the mobile terminal (in the present invention defined as 1 to 10) Position registration processor 43;

Is connected to the k-th ASP-W 42, a plurality of subscribers input through the k-th ASP-W (42), that is to control the location registration of the mobile terminal (in the present invention defined as 1 to 10) Position registration processor 44;

A Number Translation Processor (NTP) 45 which is connected to each of the plurality of ASP-Ws and performs a number translation required from each of them so that switching is performed accordingly;

A first ASP (46) connected to each location registration processor (43) and the number translation processor (45) connected to the first ASP-W (41), and performing a subscriber matching function;

A second ASP 47 connected to each of the location registration processor 44 and the number translation processor 45 connected to the k-th ASP-W 42 and performing a subscriber matching function; And

It is configured to include an Interconnection Network Processor (INP) 48 connected to each of the ASP-W (41, 42) to provide an interworking function between each ASP-W.

Referring to the operation between the personal communication exchange and the mobile terminal configured as described above, as mentioned above, a plurality of base stations 20 are formed, and each of the base stations 20 includes a plurality of mobile terminals 10 in a corresponding area. ) Is connected to the wireless communication, and the base station controller 30 performs wired communication with each of the plurality of base stations 20.

That is, one cell managed by one base station 20 may include a plurality of mobile terminals 10, and one base station controller 30 may include a plurality of base stations 20. .

Subsequently, the base station controller 30 transmits the generated call to the personal communication switch 40, and the personal communication switch 40 performs an exchange function according to the corresponding telephone number dialed by the subscriber.

At this time, the first ASP-W 41 in the personal communication switch 40 communicates with the first base station controller 30, and the k-th ASP-W 42 communicates with the k-th base station controller.

That is, a plurality of ASP-W is included in the personal communication switch 40, which is the same number as the base station controller 30.

In addition, the ASPs 46 and 47 which perform the subscriber matching function are also formed in the same number as the ASP-W.

Subsequently, the call entered in each ASP-W or the call required in each ASP is inputted to the number translation processor 45, the number is translated, and then exchanged according to the translated result. Interworking between the respective ASP-W is performed by (48).

Each of the ten location registration processors 43 and 44 is connected to the first to kth ASP-Ws 41 and 42 and the first and second ASPs 46 and 47 connected thereto, respectively, to locate the mobile terminal. Control registration.

That is, each of the first to k-th ASP-Ws 41 and 42 sets the allowable number of calls per unit time according to the overload state in order to control the incoming call to its own and sends the information according to the number translation processor ( 45) and 10 location registration processors 43. The number translation processor 45 and the plurality of location registration processors 43 provide a function called a Traffic Resource Control Library (TRCL) for each ASP. Save the information.

At this time, the traffic resource control library collects the calling subscriber information request attempts, the called subscriber information request attempts, and the location registration request attempts by function into some processing blocks included in the location registration processor, and periodically performs traffic resource control. : TRC) It performs the function of transferring to the block.

The traffic resource control (TRC) block is a partial processing block included in the location registration processor similarly to the traffic resource control library. When the location registration processor is overloaded, the traffic resource control (TRC) block has a service for each function of the location registration processor. Function to save to Telephony Device System Library (TDSL).

In addition, when a call is received from the number translation processor 45 or the plurality of location registration processors 43 to the first to k-th ASP-Ws 41 and 42, a notification is performed from such a library.

The number translation processor 45 and the plurality of location registration processors 43 provide their overload information to all the ASPs 46 and 47 so that the number translation processor 45 or the plurality of locations in all the ASPs 46 and 47. To control the call input to the registration processor 43, in all the ASP (46, 47) in the telephone device system library (TDSL) number translation processor 45 and a plurality of location registration processor 43 call spacing ( Call Gapping) Stores information and is notified of call execution from such library upon request of number translation and location registration.

For reference, referring to the load rating of the plurality of processors mounted in the personal communication switch 40, all processors (processors not shown in the figure exist) mounted inside the personal communication switch 40 have their own. The load rating has already been set (this is a public notice, so a description thereof will be omitted), and the load rating of the location registration processor 43 described by the present invention is one of a plurality of processors, meaning that the load rating of each processor is different. In the set state, the load class per single location registration processor is also set.

In detail, the load registration class corresponding to 1 to 10 types (which can be adjusted as much as the class proposed by the present invention) is set in the location registration processor, and the weight is applied to each function in the location registration processor according to the load rating. Set service thresholds separately.

That is, the performance threshold is set in a table format according to the load class.

In this state, when the service request is generated from the subscriber side, it is determined whether to allow the service by comparing the threshold value according to the load class with the number of attempts of the currently generated call.

2 is a diagram schematically illustrating a state of allowing and rejecting a call operation request of the present invention which processes a call according to the overload class of the location registration processor as described above. According to FIG. 2 showing a call operation request allowance and rejection, as an example, when a call for a location registration request is input, the ASP-W checks the overload level of the location registration processor and sets a threshold value for each service function according to the load level. If the number of service function attempts for the location registration request exceeds the corresponding threshold, the call is rejected; otherwise, the call is allowed to be transmitted to the location registration processor.

3 is a flowchart illustrating a method of controlling an overload state of the present invention to operate as described above. In FIG. 3, the weight of each function starts according to the current load class in the LRP, and the simultaneous real-time operating system (CROS) shown in the personal communication switch 40 is shown in FIG. (Not shown) a first step (S1) of detecting an overload state of the LRP and notifying the traffic resource control-location registration processor (TRC-lrp) block in the location registration processor if the overload condition is detected;

Next, the second step (S2) of generating the interval information between calls in consideration of the weight of the location registration performance and the subscriber information request performance of the current state in the traffic resource control-location registration processor (TRC-lrp) received the overload notification; ;

The call interval information generated in the step S2 is notified to the traffic resource control-aspw (TRC-aspw), and the TRC-aspw, which has been informed of this information, provides the call interval information for the station number translation control in the system library (TDSL-aspw). A third step S3 of setting);

If a location registration or subscriber information request occurs after the above steps (S4);

A fifth step S5 of determining, by the access switching processor ASP (W), an overload state of the location registration processor to determine what class the current load class is;

Subsequently, after searching the threshold value for each function of the location registration processor according to the load class determined in the step S5 using the set call interval information in the load class table, the number of attempts of the currently requested service and the service function A sixth step S6 of comparing the thresholds;

A seventh step (S7) of notifying execution rejection of the requested service if the number of attempts of the function corresponding to the requested service is greater than or equal to the threshold as a result of the comparison; And

As a result of the comparison, if the number of attempts of the function corresponding to the service is less than or equal to the threshold value, the overload control is efficiently processed through the eighth step S8 of allowing the performance of the requested service.

Through the above steps, the overload processing generated in the LRP is divided into load classes according to the performance functions of the location registration processor, and the weights are assigned to different functions according to the load classes. If the number of attempts for the function corresponding to the service does not exceed the threshold, the call processing is allowed, so that the function of the exchange can be used more efficiently.

For example, when the functions provided by the location registration processor in the personal communication exchange are the calling party subscriber information providing function, the called party subscriber information providing function, and the location registration function, the location registration processor is overloaded, and the overload occurs. After the ASP (W) examines the overload state for each service function of the overload state and then determines the overload level.

This overload class is a value that knows what percentage of the location registration processor can perform in the future, and the threshold varies according to this class.

That is, it is used to perform a function of high demand frequency and important service functions, which are one of the objects of the present invention, in comparison with other services. The weight is set high.

For example, if there is a threshold for each function according to the load class, the service allowance or rejection is determined according to whether or not the number of attempts of the function corresponding to the currently requested service is equal to or greater than the threshold, and does not correspond to the currently requested service. Even if the function overload condition exceeds the threshold, the service function is performed regardless of this.

Accordingly, in the past, when an overload condition occurred in the location registration processor unconditionally, the service of all functions was stopped. In the present invention, the service is provided by checking the overload state for each function, thereby providing a more improved service.

Lastly, the above-mentioned load class in the location registration processor and the threshold value indicate each threshold value that can be accommodated by each function in the personal communication exchange. This value is variable depending on the type and capacity of the personal communication exchange. The load rating can also be set by the user, depending on the capabilities of the Personal Switching System.

As described in detail above, the present invention divides the overload applied to the location registration processor into a class according to the load state, and sets a threshold calculated by weighting the service registration function of the location registration processor again according to the load class. By determining whether to allow the service for the call originating from the service, the service providing performance of the personal communication switch is improved.

In addition, a preferred embodiment of the present invention is disclosed for the purpose of illustration, those skilled in the art will be able to make various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (5)

An overload state control method of a location registration processor in a personal communication switch, comprising: classifying a load state of a location registration processor in a personal communication exchange into classes; Setting a threshold value for each function having a different weight for each function according to a load class for a function performed by the location registration processor; Comparing the set threshold with the number of attempts of the currently requested service when an overload condition occurs in the personal communication switch; Determining whether to allow a service in the comparing step; And processing the overload state of the location registration processor for each function according to the determination of the determining step. The method according to claim 1, wherein in the setting step, the load rating is variably changed by the user according to the capacity and type of the personal communication switch. The method according to claim 1, wherein the threshold values are built in a table for each function. The method according to claim 1, wherein each of the weights for each function is weighted for a function having a relatively high probability of service attempts. The method of claim 1, wherein the determining of whether to allow the service starts with a weight of the performance function of the LRP, and when overload is detected through a simultaneous real-time operating system (CROS), it controls the traffic resource in the location registration processor. Notifying the location registration processor (TRC-lrp) block; In the notification step, if the overload is notified, the traffic resource control-location registration processor which receives the overload notification generates interval information between calls using weights for the call operation of the current location registration performance and the subscriber information request performance. Wow; The call spacing information generated in the generating step is notified to the traffic resource control -aspw (TRC-aspw), and the TRC-aswp received the information is provided with the call spacing information for the station number translation control to the system library (TDSL-aswp). Setting; Determining a load class by examining an overload state of the location registration processor through an access switching processor (ASP (W)) when a location registration or subscriber information request occurs after the above steps; Retrieving a threshold value for each service function of the location registration processor according to the load class, and then comparing the currently requested number of service attempts with a threshold value corresponding to the service function; If the number of attempts of a function corresponding to the service requested by the subscriber is greater than or equal to the threshold, as a result of the comparison, notifying the rejection of performance of the requested service; And if the number of attempts of the function corresponding to the service requested by the subscriber is less than or equal to the threshold, allowing the performance of the requested service. Through this, overload control by function per function in the LRP of the personal communication switch is performed. Overload condition control method of a personal communication switch, characterized in that for performing.

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