KR20010056636A - Apparatus for restoring call register of call in exchange - Google Patents

Abstract

PURPOSE: An apparatus for restoring a call register to a call of a switching center is provided to improve the efficiency of practical application of call register resource by forcedly restoring the call register to an idle state. CONSTITUTION: A subscriber interface part(2) provides call attempt information of a calling subscriber to a subscriber call control part(6) if the calling subscriber hooks off. The subscriber control part(6) assigns a call register(12) of the corresponding call. A signal apparatus(4) receives a telephone number of a called subscriber for providing the number to the subscriber call processing part(6). A call processor control part controls a call process of specific called and calling subscribers. The call register(12) stores information related to call process of the specific called and calling subscribers under the control of the call process control part and enables the call process control part to access when needed. A call register restoring part(14) monitors the call register(12) periodically and restores the call register(12) to an idle state if the call process of the specific called and calling subscribers is terminated.

Description

Call register recovery device for calls of exchanges {APPARATUS FOR RESTORING CALL REGISTER OF CALL IN EXCHANGE}

The present invention relates to a device for recovering a call register for a call of an exchange, and more particularly to a device for forcibly recovering a call register occupied unnecessarily.

In an exchange according to the prior art, the call processing unit stores information related to call processing in a call register and processes the call using information stored in the call register whenever necessary. Information related to subscriber call processing during the above-described call processing includes a calling number, a called number, additional service information, a line number of a subscriber board, and the like. The information related to the relay call processing includes the calling number, the called number, the additional service information, the line number of the trunk / subscriber board, and the like.

Such a call register is an important memory resource that is essential for handling subscriber and relay calls of the exchange. Therefore, when a telephone call is terminated and execution of a specific call processing is completed, the specific call register used for this specific call processing must be restored to its original state so that it can be used for other call processing. If a specific call register needs to be restored to its original state but failed to recover due to a fault, a call register resource is lost each time, causing a problem in the call processing service of the exchange and overall service related thereto. .

The present invention has been made to improve the above-mentioned drawbacks. When the call is terminated because the call is terminated between the called party and the calling party, the call register used in the call processing is still occupied. It is an object of the present invention to provide a call register recovery device for a call of an exchange to recover to an idle state.

In order to achieve the above object, the present invention provides a call register recovery apparatus for a call of an exchange, comprising: a call processing control unit for controlling call processing of a specific incoming / outgoing subscriber; A call register under the control of the call processing controller to store the call processing related information of the specific incoming / outgoing subscriber and to access the call processing controller when necessary; And a call register recovery unit which mainly monitors the call register and restores the call register to an idle state when the call processing of the specific incoming / outgoing subscriber is terminated.

1 is a block diagram showing an embodiment of a call register recovery apparatus for a subscriber call of an exchange according to the present invention;

2 is a flow chart illustrating, step by step, an embodiment of a call register recovery according to FIG. 1;

3 is a block diagram showing an embodiment of a call register recovery apparatus for a relay call of an exchange according to the present invention;

4 is a flow chart illustrating, step by step, an embodiment of call register recovery according to FIG. 3;

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

2, 18: subscriber matching unit 4: signaling device

6: subscriber call control unit 8: number translation unit

10: switching unit 12: call register

14 call register recovery unit 16: operating system

20: relay call matching unit 22: relay call control unit

Hereinafter, the embodiment of the present invention will be described in detail with reference to the following drawings.

1 is a block diagram showing an embodiment of a call register recovery apparatus for a subscriber call of an exchange according to the present invention. The subscriber matching section 2, the signaling device 4, the subscriber call control section 6, and the number translation section ( 8), a switching unit 10, a call register 12, a call register recovery unit 14, and an operating system (OS) 16.

In the figure, the illustrated configuration is included in the Access Switching Subsystem (ASS) of the exchange.

First, the subscriber matching unit 2 detects the first subscriber, for example, when the calling subscriber hooks off, and provides call origination information of the calling subscriber to the subscriber call controller 6.

The subscriber call control section 6 receives the call attempt information of the calling subscriber from the subscriber matching section 2 and allocates the call register 12 of the corresponding call if the calling subscriber is a callable subscriber.

The signaling device 4 receives a second subscriber example dialed by the calling subscriber from the subscriber matching unit 2, and receives the number of the called subscriber and provides it to the subscriber call controller 6.

The subscriber call control unit 6 requests the number translation unit 8 to translate the number of the called subscriber provided from the signaling device 4. The subscriber call control unit 6 controls the function of providing the call of the switching unit 10 when the number translation result provided from the number translation unit 8 is the self-received call, and thus, the subscriber call controller 6 controls the intra-junction ( An intra-junctor is used to form a speech path between the called party and the calling party. On the other hand, in the case of other match exchange subsystem, a space switch is used to form a call path. Subsequently, the subscriber call control section 6 controls the signaling device 4 to generate a ring signal and transmits the ring signal to the called subscriber through the subscriber matching section 2.

The call register recovery unit 14 monitors the call register 12 periodically and when the call register 12 is occupied even when the call is terminated because the call is terminated between the calling party and the called party, the call register 12 is occupied. ) Is forcibly restored to its original idle state. Initially loading into the matching exchange subsystem registers with the operating system 16 so that the call register recovery section 14 can receive a one hour timer signal every 10 minutes every hour. Thereafter, the operating system 16 transmits a timer signal to the call register recovery unit 14 every 10 minutes to control the operation of the call register recovery unit 14 on the system. At this point, having a periodic statistical report measured every 10 minutes is likely to avoid overloading the system.

2 is a flowchart illustrating step by step an embodiment of a call register recovery according to FIG.

In the figure, it is determined whether it is a call register for a local subscriber call (step 22).

If it is a call register for the own subscriber call, it is determined whether the block using the call register is an additional service block (step 24). For example, it is checked whether a block using a call register is a "Call Forwarding Control (CFWC), Call Transfer Control (CTRC), Digital Subscriber Call Forwarding Control (DCFW), and a Digital Subscriber Call Transfer Control (DCTX) block. This is a block that provides additional services called "CFR (Call Forwarding) and CTR (Call Transfer)". As the subscriber state is idle, not the child process, the child process of the block that handles the service. To check if a) is alive. If the process does not exist, the call register is recovered and the call register is restored.

If the block using the call register is an additional service block, it is determined whether it is an outgoing call (step 26).

If it is an outgoing call, read the status information of the outgoing call processing process (step 28).

If not, the status information of the incoming call processing process is read (step 30).

If no call processing process exists, the call register is forcibly restored to idle (step 34).

In step 24, if the block using the call register is not an additional service block, it is determined whether it is an originating call.

In the case of the originating call, the status information of the subscriber line is read (step 38).

It is determined whether the subscriber line is busy (step 40).

If the subscriber line is not busy, the call register is forcibly restored to idle (step 42).

3 is a block diagram showing an embodiment of a call register recovery apparatus for a relay call of an exchange according to the present invention, and includes a signaling device 4, a relay call controller 22, a number translation unit 8, and a switching unit 10. ), A call register 12, a call register recovery unit 14, an operating system 16, a subscriber matching unit 18, and a relay call matching unit 20.

In the figure, the configuration shown is included in the Trunk-Access Switching Subsystem (T-ASS) of the exchange. There are "4 x 1,024" call registers in one trunk matched exchange subsystem.

First, the relay call matching unit 20 is an example of a subscriber that is received from another station, and detects when the calling subscriber is hooked off (CAS (Channel Associate Signaling) or CCS (Common Channel Signaling)). In accordance with the relay call control unit 22 provides the call attempt information of the calling subscriber.

The relay call control unit 22 receives the call attempt information of the calling subscriber from the relay call matching unit 20 and allocates the call register 12 of the corresponding call if the calling subscriber is an outgoing subscriber.

The signaling device 4 receives the number of the called subscriber dialed by the calling subscriber from the relay call matching unit 20 and provides it to the relay call controller 22.

The relay call control unit 22 requests the number translation unit 8 to translate the number of the called subscriber provided from the signal device 4. The subscriber call control unit 6 controls the function of providing the call of the switching unit 10 when the number translation result provided from the number translation unit 8 is a self-received call, and calls between the called party and the calling party by using a space switch. Form a furnace. Subsequently, the relay call control unit 22 controls the signaling device 4 to generate a ring signal, and sends the ring signal to the called party through the subscriber matching unit 18.

The call register recovery unit 14 monitors the call register 12 periodically and when the call register 12 is occupied even when the call is terminated because the call is terminated between the calling party and the called party, the call register 12 is occupied. ) Is forcibly restored to its original idle state. It is initially loaded into the match exchange subsystem and registers with the operating system 16 so that the call register recovery section 14 can receive a one hour timer signal every 10 minutes every hour. Thereafter, the operating system 16 transmits a timer signal to the call register recovery unit 14 when it is 10 minutes every hour to control the operation of the call register recovery unit 14 programmatically on the system. At this point, having a periodic statistical report measured every 10 minutes is likely to avoid overloading the system.

4 is a flowchart illustrating step by step an embodiment of a call register recovery according to FIG.

In the same figure, it is determined whether or not it is a call register for a relay call (step 22).

In the case of a call register for the relay call, it is determined whether the call register is in use (step 24).

If the call register is in use, relay line information is read from this call register (step 26).

It is determined whether the relay line is in use (step 28).

If the relay line is not in use, the call register is forcibly restored to idle (step 30).

As described above, the present invention relates to a case in which the call register 12 used in the call processing is still occupied when the call is terminated because the call is terminated between the called party and the calling party or the calling party of another country. Force 12) to recover to an idle state. Therefore, the utilization efficiency of call register resources is improved. For example, in the calculation of "Erlang Traffic", the long occupancy time due to the call register recovery is summed, resulting in the inaccuracy of the output result. It can prevent the problem of the congestion condition caused by the recovery.

Claims (4)

In a call register recovery device for a call of an exchange: A call processing control unit controlling call processing of a specific called party; A call register under the control of the call processing controller to store the call processing related information of the specific incoming / outgoing subscriber and to access the call processing controller when necessary; And a call register recovery unit which monitors the call register primarily and restores the call register to an idle state when the call processing of the specific incoming / outgoing subscriber is terminated. The method of claim 1, And an operating system for controlling software operation of the call register recovery unit on a system. The method according to claim 1 or 2, And the call is a local call. The method according to claim 1 or 2, And the call is a relay call by another station.