KR20010047932A - Apparatus for handling overload in an personal communication service exchange - Google Patents

Abstract

PURPOSE: A device for processing overload of a PCX(Personal Communication service Exchange) is provided to increase an overload control grade in respond to an overload state increase, and to limit a call connected with a BSC(Base Station Controller). Therefore, it is possible to prevent a completion of a call connection phasing, and to prevent a re-phasing for a call connection. CONSTITUTION: A BSC(Base Station Controller)(200) transmits a BSMAP(Base Station Mobile Application Protocol) message notifying an overload state to a PCX(Personal Communication service Exchange) according to sequential call processing performances between mobile terminals. A PCC(Personal Communication Service call Controller)(341) transmits the BSMAP message if the BSMAP message is received from the BSC(200). An overload controller(343) limits a call connection phasing performance step between the mobile terminals if the BSMAP message is received from the PCC(341), and drives a timer to set up a determined time. After the set time elapses, the overload controller(343) controls to limit every call of the mobile terminals if the BSMAP message is continually received from the BSC(200).

Description

Overload processing unit of personal communication exchange {APPARATUS FOR HANDLING OVERLOAD IN AN PERSONAL COMMUNICATION SERVICE EXCHANGE}

The present invention relates to an overload processing apparatus of a Personal Communication Service eXchange (hereinafter abbreviated as PCX), and in particular, to identify an overload state of a base station controller (hereinafter referred to as BSC). When increased, it relates to an overload handling device that allows to increase the overload control class to limit the call.

Typically, the PCX system switches freely to call anytime, anywhere, anyone, and can communicate with each other, or between mobile and fixed, using special services, sending messages with mobile subscribers moving in unspecified areas. By the base station Tranceiver System (hereinafter abbreviated as BTS) that manages radio resources to receive and by the BSC that performs various functions required for radio call processing such as handoff while controlling and managing multiple BTSs Two-way call is made between the calling party and the called party.

When the PCX system receives a call request from a mobile terminal moving to an unspecified area and performs call connection paging to the called terminal, if there is no call connection paging response from the called terminal due to the overload of the BSC, the PCX system returns to the called terminal. There was a problem in which call connection paging should be terminated or re-paged.

Accordingly, the present invention has been made to solve the above-described problems, the object of which is to increase the overload control class in response to the increase of the overload condition of the BSC to overload processing of the PCX to limit the call connected to the BSC In providing a device.

In the present invention to achieve the above object, the overload processing apparatus of the PCX is a base station controller for transmitting a base station application protocol message to the personal communication exchange informing that the overload condition in accordance with the continuous call processing between a plurality of mobile terminals; A personal communication service call controller for transmitting a base station application protocol message when a base station application protocol message is received from the base station controller; When the base station application protocol message is received from the personal communication service call controller, the mobile station includes a timer, limits a call connection paging process among a plurality of mobile terminals, runs a timer to set a predetermined time, and then the set time elapses. Then, if the base station application protocol message is continuously received from the base station controller, and includes an overload control unit for controlling to limit all calls between a plurality of mobile terminals.

1 is a block diagram of an overload processing apparatus of a personal communication exchange according to the present invention;

2 is a detailed flowchart of the overload processing apparatus of the personal communication exchange according to the present invention.

<Description of the symbols for the main parts of the drawings>

10, ...: first mobile terminal

30, ...: second mobile terminal

100: BTS 200: BSC

300: PCX 341: PCC

343: overload control unit 345: timer

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the present invention.

1 is a block diagram of an overload processing apparatus of a PCX according to the present invention, and includes a first mobile terminal (10, ...), a second mobile terminal (30, ...), a BTS (100), and the like. , BSC 200, and PCX 300.

The first and second mobile terminals 10,..., 30,... Are mobile stations that are mobile or fixed, and each of the first and second mobile terminals 10,..., 30,. ..) is controlled by the corresponding BTS (100, ...), and is free to move to the controllable area in the BTS (100, ...). As an example of an outgoing terminal having such a function, the first mobile terminal 10 is generated in a called terminal, for example, a second mobile terminal 30, each requesting a call connection request message.

Each BTS (100, ...) is a form of a fixed station, and after wireless connection with the first and second mobile terminals (10, ..., 30, ...) belonging to the fixed station, the BSC ( The control unit 200 controls the first and second mobile terminals 10,..., 30,... Each one of the first and second mobile terminals 10,..., 30,..., A call connection request message is generated in the first mobile terminal 10 and the other terminal, for example. When incoming to the second mobile terminal 30, one of the BTS (100) of each of the BTS (100, ...) transmits the input call connection request message to the BSC (200).

The BSC 200 controls a plurality of BTSs 100,... By connecting to a plurality of BTSs 100,... 1 The call connection request message received from the BTS 100 controlling the mobile terminal 10 is transmitted to the PCX 300. At this time, if the BSC 200 continuously receives a call connection request message from a plurality of BTSs (100, ...), it means that the CPU is congested, and the base station application protocol indicating that it is overloaded (Base Station Mobile Application). Protocol: hereinafter referred to as BSMAP) message to the PCX (300).

The PCX 300 is connected to the BSC 200, and switches the call connection request message transmitted from the BSC 200 through the BTS 100 in another exchange (not shown) and the local exchange in the local exchange. As an example, a personal communication service call controller (hereinafter, referred to as PCC) 341, an overload controller 343, and a timer 345 are provided.

For example, when the PCC 341 performs call connection paging to the second mobile terminal 30 according to the call connection request message received from the BSC 200, the PCC 341 receives the call connection paging from the BSC 200. When the BSMAP message indicating that the BSC 200 itself is overloaded, the BSCAP transmits the BSMAP message to the overload controller 343.

When the BSMAP message is received from the PCC 341, the overload controller 343 controls to limit the call connection paging process from the first mobile terminal 10 to the second mobile terminal 30 by about 10%. At this time, the overload controller 343 drives the timer 345 to set a predetermined time, for example, 9 seconds, and then ignores the BSMAP message received from the BSC 200 within the set 9 seconds. On the other hand, if the BSMAP message is continuously introduced from the BSC 200 in addition to the set 9 seconds, the overload control unit 343 increases the overload control level by one step and the second mobile terminal 30 in the first mobile terminal 10. Further restricts the call paging process to about 10%. In this way, if the time of the timer 345 continues, the level of overload continues to increase and rise to a maximum of 10, thereby limiting all calls that are paged through the PCC 341. On the other hand, the overload controller 343 lowers the overload class by one level if the BSMAP message is not received even when 9 seconds have elapsed from the BSC 200.

With reference to the flowchart of FIG. 2, the overload processing apparatus of the personal communication exchange in this invention which has the above-mentioned structure is demonstrated in more detail.

First, in the present embodiment, the BSC 200 is an overload state, and the BSC 200 transmits a BSMAP message indicating the overload state to the PCX 300. For convenience of description, the first mobile terminal 10 is the calling terminal. It is assumed that the second mobile terminal 30 is the called terminal.

The first mobile terminal 10 is controlled by the BTS 100 and generates a call connection request message to the second mobile terminal 30 desired by the user while freely moving to the controllable area in the BTS 100 ( Step 201).

The BTS 100 receives the call connection request message from the first mobile terminal 10 and transmits it to the BSC 200 (step 202). The BSC 200 then sends a call connection request message received from the BTS 100 to the PCC 341 in the PCX 300 (step 203). In this case, as in the above-described assumption, as the CPU state of the BSC 200 is congested, a BSMAP message indicating that it is overloaded is transmitted to the PCC 341 in the PCX 300 (step 204).

When the PCC 341 in the PCX 300 performs call connection paging to the second mobile terminal 30 according to the call connection request message received from the BSC 200, the PCC 341 receives the BSC from the BSC 200. (200) As the BSMAP message indicating that the state is overload is received, the call connection paging to the second mobile terminal 30 is suspended, and the BSMAP message is transmitted to the overload controller 343 (step 205).

When the BSMAP message is received from the PCC 341, the overload controller 343 controls to limit the call connection paging process from the first mobile terminal 10 to the second mobile terminal 30 by about 10% (step 206). . Thereafter, the overload controller 343 drives the timer 345 to set a predetermined time, for example, 9 seconds, and then determines whether a BSMAP message has been received from the BSC 200 within the set 9 seconds (step 207). .

If the BSMAP message is received from the BSC 200 within the predetermined time in the determination step 207, the BSMAP message is ignored (step 208). On the other hand, if the BSMAP message is continuously introduced from the BSC 200 after a predetermined time has elapsed in the determination step 207, the second mobile terminal from the first mobile terminal 10 increases the overload control level by one step. The process of performing call connection paging to 30 is further limited by about 10% (step 209).

As described above, if the time of the timer 345 continues, the overload control unit 343 continuously increases the level of the overload to as high as 10 grades, and restricts all calls paged through the PCC 341. (Step 210).

On the other hand, if the BSMAP message is not received from the BSC 200 after a predetermined time elapses, the overload controller 343 lowers the overload grade by one level (step 211).

As described above, the present invention increases the overload control class in response to an increase in the overload state of the BSC to limit a call connected to the BSC, thereby terminating the call connection paging to the called terminal due to the increase in the overload state of the conventional BSC, or There is an effect that can solve the problem of having to page back to the destination terminal for the call connection.

Claims (3)

In the personal communication switch having a plurality of mobile terminals, and controls the call connection between the plurality of mobile terminals, A base station controller for transmitting a base station application protocol (hereinafter, referred to as BSMAP) message to the personal communication exchange indicating an overload condition as a result of continuous call processing between the plurality of mobile terminals; A personal communication service call controller for transmitting the BSMAP message when the BSMAP message is received from the base station controller; And a timer, and when the BSMAP message is received from the personal communication service call controller, limits a call connection paging process between the plurality of mobile terminals, drives the timer to set a predetermined time, and then sets the set time. And an overload controller for controlling to limit all calls between the plurality of mobile terminals when the BSMAP message is continuously received from the base station controller after a lapse of time. The method of claim 1, wherein the overload control unit, And if the BSMAP message is not continuously received from the base station controller after the set time has elapsed, controlling to release the limited call by one class. The method of claim 1, wherein the overload control unit, And if the BSMAP message is received from the base station controller within the set time, disregarding the received BSMAP message.