JP3409833B2 - Call processing method in intelligent network - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to congestion control matching processing and call loss prevention processing when restarting SCP (service control point) and SSP (service switching point) in an intelligent network system.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing a configuration example of an intelligent network system.

In this example, as shown in FIG. 4, a database S (not shown) for controlling various services in the intelligent network system is stored.
A CP (service control point) 102 and an SSP (service switching point) 103 for realizing a service requested by a call according to control information output from the SCP 102 are connected to each other by a common line signaling link 104. There is.

[0004]

In the above-mentioned intelligent network system, it has not been considered to make the congestion control information coincident with each other when the SCP and the SSP are restarted.

When the SCP is restarted, the SSP sends the SC
Since the congestion control information before the restart of P is held and the call is sent from the SSP to the SCP based on the held congestion control information, the congestion control expected by the SCP is performed. However, there is a problem that the regulated call is lost.

When the SSP is restarted, the congestion control information before the SSP is restarted is cleared by the SSP, and the call is sent to the SCP without performing the congestion control. Therefore, the SCP is in the congestion state. It may adversely affect the entire system.

The present invention has been made in view of the problems of the above-mentioned conventional techniques, and when the SCP or SSP is restarted, the call is not lost and the SCP is in a congestion state. An object of the present invention is to provide a call processing method in an intelligent network system capable of resuming call processing without a call.

[0008]

In order to achieve the above object, the present invention provides a call in accordance with an SCP in which a database for controlling services in an intelligent network is stored and control information output from the SCP. A call processing method in an intelligent network, comprising: an SSP for realizing a requested service, wherein call processing in the SSP is performed by sending a call processing start notification from the SCP to the SSP. In some cases, before the call processing start notification is sent from the SCP to the SSP, the SCP sends a clear notification of congestion control information before the SCP is restarted to the SSP and the SCP is restarted.
Notification of congestion control information according to the congestion situation in
When the call processing start notification is received at the SSP
Based on the congestion control information notified from the SCP
It is characterized by carrying out call processing .

Further, the SCP in which a database for controlling services in the intelligent network is stored, and the SSP for realizing the service requested by the call according to the control information output from the SCP.
And a call processing method in an intelligent network for carrying out call processing in the SSP by sending a call processing start notification from the SCP to the SSP.
Before sending the call processing start notification from the CP to the SSP, the SS sends the SS to the SSP.
Notify congestion control information before P restart, and in the SSP
When the call processing start notification is received, communication from the SCP is notified.
The call processing is performed based on the known congestion control information .

(Operation) In the present invention configured as described above, when the SCP is restarted, before the call processing start notification is sent from the SCP to the SSP,
Since the clear notification of the congestion information before the SCP is restarted and the message for performing the congestion control with the congestion control information in which the SCP and the SSP are the same are sent to the SP, the congestion control expected by the SCP is performed. , Call loss is prevented.

When the SSP is restarted, before the call processing start notification is sent from the SCP to the SSP, the SC
When a message for performing congestion control is sent from P to the SSP with the congestion control information in which the SCP and the SSP match, the SCP is prevented from entering the congestion state.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a system to which a call processing method in an intelligent network system of the present invention is applied.

In this embodiment, as shown in FIG. 1, an SCP (service control point) 2 in which a database (not shown) for controlling various services in the intelligent network system 1 is stored, and is output from the SCP 2. An SSP (service switching point) 3 for realizing the service requested by the call according to the control information is connected to each other by a common line signal link 4, and S
Upon completion of restarting, the CP2 performs congestion control matching processing by notifying congestion control information clear and new congestion control information, and then sends a call processing start notification to call processing to the SSP3. When the restart of the SSP3 is completed, the congestion control information before the restart of the SSP3 is notified and the congestion control information is matched, and then the call processing start notification is sent to the SSP3 to instruct the call processing to start. The congestion control function unit 5 for performing the SSP is provided.
3, when SCP2 is restarted, the disconnection of the common line signal link 4 is detected, the restart of SCP2 is recognized, the sending of the call to SCP2 is stopped, and when the restart of SCP2 and SSP3 is completed, the call processing from SCP2 is started. Until the notification is received, the sending of the call to SCP2 is stopped, and when the call processing start notification is received, the sending of the call to SCP2 is started based on the regulation information held in SSP3.
The call processing function unit 7 and the regulation information are held, and when the restart of SCP2 and SSP3 is completed, the congestion control information notification sent from SCP2 is received and the congestion control information matching processing is performed. When the call processing start notification is received, the call processing function section 7 is provided with a congestion control function section 6 for instructing to start the call processing.

The SCP and SS in the intelligent network system configured as above will be described below.
The operation of the congestion control information matching process and the call loss prevention method when P is restarted will be described.

FIG. 2 is a sequence diagram showing the operation when the SCP is restarted in the intelligent network system shown in FIG. 1, and FIG. 3 is a sequence diagram showing the operation when the SSP is restarted in the intelligent network system shown in FIG. Is.

First, the processing operation when the SCP is restarted will be described with reference to FIG.

In order to prevent congestion control of SCP2, first, INAP (Intelligent Network Application Protocol)
The CallGap message defined by col) is sent from the congestion control function unit 5 to the congestion control function unit 6 (step S1).

Call sent from the congestion control function unit 5
When the Gap message is received by the congestion control function unit 6, the congestion control function unit 6 notifies the call processing function unit 7 of the regulation information (step S2), and then the call processing function unit 7 calls the CallGap message. Based on the regulation information held in the congestion control function unit 6 for the Duration (regulation duration) set in
Calls sent to the terminal are regulated (step S
3).

Duratio, which is the duration of congestion control
When the restart of SCP2 occurs before n has elapsed and the restart of SCP2 is detected by the call processing function unit 7 (step S
4) The call processing function unit 7 stops sending the call to the SCP 2 until the call processing start notification is received from the congestion control function unit 5 (step S5).

When the restart of SCP2 is completed (step S
6), considering that the congestion control function unit 6 holds the regulation information before the SCP 2 is restarted, the congestion control function unit 5
A regulation information clear notification is transmitted from the congestion control function unit 6 to the congestion control function unit 6 (step S7), and the congestion control information is cleared in the congestion control function unit 6 (step S7).

Next, the congestion control function unit 5 to the congestion control function unit 6 according to the congestion status at the time of completion of restart of the SCP2.
A CallGap message is sent to the call control unit 5 (step S8), and the CallG message sent from the congestion control function unit 5 is sent.
When the ap message is received by the congestion control function unit 6,
The congestion control function unit 6 notifies the call processing function unit 7 of the restriction information (step S9).

As a result, the congestion control is made uniform when the SCP2 is restarted.

Thereafter, the congestion control function unit 5 sends a call processing start notification to the congestion control function unit 6 (step S
10) When the congestion control function unit 6 receives the call processing start notification, the congestion control function unit 6 sends the call processing start notification to the call processing function unit 7 (step S11).

Then, the call processing function unit 7 starts to send a call to the SCP 2 based on the regulation information received in step S9 (step S1).
2).

Through the series of processes described above, the congestion control expected by SCP2 is performed, and the call loss is prevented.

Next, the processing operation when the SSP is restarted will be described with reference to FIG.

In the same way as the above-mentioned processing when restarting the SCP, the congestion control function unit 5 sends a C to the congestion control function unit 6.
The allGap message is transmitted (step S2
1), CallGap sent from the congestion control function unit 5
When the message is received by the congestion control function unit 6, the congestion control function unit 6 notifies the call processing function unit 7 of the restriction information (step S22). Based on the regulation information held in the unit 6, the call transmitted to the SCP2 is regulated (step S23).

Resumption of SSP3 occurs (step S2
4) Since the regulation information is cleared when completed (step S25), the congestion control function unit 5 sends to the congestion control function unit 6 a CallGap message of the regulation information similar to that sent in step S21. When the CallGap message sent out (step S26) and sent from the congestion control function unit 5 is received by the congestion control function unit 6, the congestion control function unit 6 notifies the call processing function unit 7 of the restriction information. (Step S27).

As a result, the congestion control at the time of restarting the SSP3 is made uniform.

Thereafter, the congestion control function unit 5 sends a call processing start notification to the congestion control function unit 6 (step S
28), when the congestion control function unit 6 receives the call processing start notification, the congestion control function unit 6 sends the call processing start notification to the call processing function unit 7 (step S29).

Then, the call processing function unit 7 starts sending a call to the SCP 2 based on the regulation information received in step S28 (step S3).
0).

Through the series of processes described above, the call loss can be prevented without the SCP2 being in a congestion state.

[0034]

Since the present invention is constructed as described above, it has the following effects.

According to the first aspect, the SCP
When restarting, before sending a call processing start notification from the SCP to the SCP, the SCP sends the SCP to the SSP.
Since the clear notification of the congestion information before resumption and the message for performing the congestion control with the congestion control information in which the SCP and the SSP are the same are transmitted, the congestion control expected by the SCP can be performed. Loss can be prevented.

According to the second aspect, the SSP
When restarting, before sending a call processing start notification from the SCP to the SCP, the SCP sends the SCP to the SSP.
Since the configuration is such that the message for performing the congestion control is transmitted with the congestion control information that the SSP and the SSP match, it is possible to prevent the SCP from entering the congestion state and prevent the entire system from being damaged.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a system to which a call processing method in an intelligent network system of the present invention is applied.

FIG. 2 is a sequence diagram showing an operation when SCP is restarted in the intelligent network system shown in FIG.

FIG. 3 is a sequence diagram showing an operation when the SSP is restarted in the intelligent network system shown in FIG.

FIG. 4 is a block diagram showing a configuration example of an intelligent network system.

[Explanation of symbols]

1 Intelligent network system 2 SCP (service control point) 3 SSP (service exchange point) 4 Common line signal link 5, 6 Congestion control function unit 7 Call processing function section

Claims (2)

(57) [Claims] 1. An SCP, which stores a database for controlling services in an intelligent network, and an SSP for realizing a service requested by a call according to control information output from the SCP, In a call processing method in an intelligent network for executing call processing in the SSP by sending a call processing start notification from the SCP to the SSP, in the restart of the SCP, from the SCP to the SS
Before sending the call processing start notification to P,
Congestion control before CP restart from CP to SSP
Congestion at the time of clear notification and the SCP resumption of your information
Notify congestion control information according to the situation and notify the SSP
When the call processing start notification is received, the SCP
Call processing is performed based on the congestion control information notified from
Call processing method in an intelligent network, characterized in that Hodokosuru. 2. An SCP, which stores a database for controlling services in an intelligent network, and an SSP for realizing a service requested by a call according to control information output from the SCP, In a call processing method in an intelligent network for executing call processing in the SSP by sending a call processing start notification from the SCP to the SSP, when the SSP is restarted, the SCP sends the SS
Before sending the call processing start notification to P,
Congestion control before restarting the SSP from the CP to the SSP
Notification information, and the call processing start notification in the SSP.
The congestion notified from the SCP when receiving the knowledge
A call processing method in an intelligent network, characterized by performing call processing based on control information .