KR100226437B1 - Dialogue Release Method for Advanced Intelligent Network Intelligent Peripheral - Google Patents

Abstract

The present invention is implemented in an intelligent information providing system (IP) that provides a special resource to a next-generation intelligent network service user, and interacts with a service controller among the functions of an intelligent network application protocol for processing an intelligent network service through interaction with a service controller (SCP). The present invention relates to a method of terminating a dialog set up for the purpose. The scheduled termination method for terminating the dialog is when the IP receives a broadcast announcement (PA) operation instruction from the SCP, when the IP receives a message deletion (EM) operation instruction from the SCP, and the SCP receives service logic. In this case, by using either of the case of requesting the SSP to disconnect the IP, the signaling network can be efficiently used by performing the scheduled termination without the IP and the SCP exchanging a message for terminating the dialog.

Description

Dialogue Release Method for Advanced Intelligent Network Intelligent Peripheral

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of processing intelligent network application protocols, and in particular, provides special resources such as voice guidance, dual tone multi-frequency collection, DTMF, voice recognition, and voice recording to users of next generation Advanced Intelligent Network (AIN) services. The present invention relates to a method of terminating a dialog in an intelligent peripheral (IP).

In the existing intelligent network, an intelligent information providing system (IP) is implemented by providing a service user by implementing a simple announcement and DTMF collection function in a service switching point (SSP) without using an intelligent information providing system (IP). ), And no application protocol between the service controller (SCP). However, next-generation intelligent network services must be able to provide a variety of special resources such as speech recognition, speech synthesis, voice recording, and fax processing. It is expensive to develop it in the existing SSP, and it is difficult to add and change new resources easily for the developed network resources. Therefore, it is efficient to provide this in the intelligent information providing system (IP). This can be called. Therefore, in the IP, an intelligent network application protocol (INAP) is implemented for communication with a service controller (SCP) as defined by international standards.

In the next-generation intelligent network structure in which the intelligent information providing system (IP) and the service controller (SCP) are directly connected, it is essential to define a method of setting and releasing a dialog, which is a logical communication path between SCP and IP. In the present invention, the dialog termination procedure is largely divided into a scheduled termination and a basic termination, and according to operation transmission / reception scenarios, each case is used for what kind of termination method is used.

It is implemented in the Single Association Dialogue Control (SADC) block and the Single Association Operation Control (SAOC) block, which are some functional blocks of the Intelligent Network Application Protocol (INAP). I want to make it possible.

An object of the present invention is to provide efficient use of signaling network resources by providing a scheduled termination method and a basic termination method for terminating a dialogue between IP and SCP among INAP functions implemented in AIN IP for processing an application service between IP and SCP. Is in.

1 is a physical structure diagram of a next generation intelligent network intelligent information providing system applied in the present invention,

2 is a block diagram of an AIN IP INAP function block;

3 (a) to 3 (c) illustrate one embodiment of the present invention, a dialog termination procedure by scheduled termination;

4 (a) to 4 (d) show another example of a dialog termination procedure by basic termination.

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

As shown in FIG. 1, the physical structure of the next generation intelligent network intelligent information providing system (AIN IP) 300 is divided into an active and standby state connected to the disk array 360 in a SCSI (SCSI-2) manner. Special Resource Control Processor (MP) in Main Processor (310, 320), Specialized Resource Switching Processor (SRSP) 330, and Specialized Resource Control Subsystem (SRCS) 340 (SRCP: specialized resource control processor) 350, and four subsystems are distributedly mounted. That is, each main processor (310, 320) has a special function resource function (SRF: Service Control Subsystem, 312, 322) and a system operation management unit (OMS: Operation Management Subsystem, 311, The special resource control processor 350 incorporates advanced special resource control functions such as voice recording / recognition / synthesis and fax processing. Special resource switching processor (SRSP, 330) is located in front of the SRCP (350), and some functions of the network matching unit and the SRF service control unit for interface with the SSP (100) and the SCP (for example, ASP: An Access Switching Processor (IOP: Remote I / O Processor) is implemented. The network matching unit includes the digital CEPT1 interface (DCI) and the subscriber interface (SI).

Meanwhile, the MP 310, the SRSP 330, and the MP 310, 320, and the SRCP 350 are connected to the LAN 370, and the SRSP 330 and the SRCP 350 are connected to the E1 link. By adding a new SRCP 350, it is designed to easily expand the service processing capacity of the AIN IP. That is, the system can provide basic services such as DTMF collection and announcement broadcasting only by the SRSP 330 of the previous stage, thereby reducing the load on the traffic and the main processor on the Ethernet, improving the speed of service provision, and expensive SRCP. It is designed to increase economic efficiency, such as reducing the frequency of use.

2 shows a functional block structure of AIN IP INAP.

The intelligent network application protocol (INAP) 500 consists of multiple association control functions (MACFs), single association control functions (SACFs), and application service elements (ASEs). Through a signaling network through a lower layer transaction capability application part (TCAP) 600, a signaling connection control part (SCCP), and a message transfer part (MTP). It is a protocol that processes application services by exchanging control signals with. As shown in FIG. 2, the IP INAP 500 includes a protocol message matching (PMM) block 510, a single association control management (SACM) block 521, and a single access operation. A single association operation control (SAOC) block 522, and a single association dialogue control (SADC) block 523. The dialog termination method of the present invention comprises a SADC 523 and a SAOC block. It is carried out by the interaction of (522), and is carried out by a protocol agreement with SCP INAP.

There are two ways to terminate a established dialog: scheduled termination and basic termination.

Here, 'scheduled end' is a method that does not need to exchange a message for terminating a dialogue through a signal network by releasing the dialogue by itself knowing that it is no longer necessary to maintain a dialogue between the two communicating parties. 'Basic termination' is a method of releasing a corresponding resource related to a dialog by determining a termination state of a dialog and sending a termination request message to the counterpart.

FIG. 3 illustrates three procedures capable of terminating the dialog as scheduled termination when performing communication using the INAP protocol between the intelligent information providing system (IP) and the service controller (SCP). As shown in (a), (b), (c), FIG. It is shown separately. The following describes the release procedure in each case.

First, a case of performing a broadcast announcement (PA) operation illustrated in FIG. 3A will be described. If the IP has received the announcement broadcast operation instruction from SCP, then the announcement completion value of the announcement items is false, that is, it is not necessary to report to SCP after the announcement broadcast is completed. If the IP disconnect connection prohibition value (disconnectFromIPForbidden) is false, that is, each PA is sent to the SSP after attempting to perform the operation, the IP performs the PA and then the scheduled end request (TC_End request). ) Indicates to the termination item value of the primitive message and transmits it to the TCAP 600, and releases the corresponding dialog resource. IP TCAP also releases the associated dialog resources by itself and does not send any other messages to SCP. After transmitting an announcement broadcast operation, SCP starts a timer (Tpa) that measures the duration of the operation, and when the timer (Tpa) expires, SCP INAP assumes that the announcement broadcast operation was successfully performed on the IP. Sends a TC_End request primitive for scheduled termination to the TCAP. Meanwhile, to release the bearer connection between the SSP and the IP, a REL (Release) message (when the SSP and the IP communicates with ISUP) is transmitted to the SSP.

Next, a case of performing an Erase Message (EM) operation shown in FIG. 3B will be described. If the value of the disconnect from IPForbidden in the parameter items of the EM operation received from the SCP is false, IP INAP requests a scheduled termination as a scheduled termination by TCAP after successful message deletion as in the case of PA operation. Send primitives. SCP INAP, on the other hand, is informed by SCP TCAP that the timer has expired and releases the dialog as scheduled termination.

Finally, the case of SSP start connection release shown in FIG. 3C will be described.

According to the Service Logic Processing Program (SLP), when an SCP requests an SSP to disconnect from an IP, it sends a Disconnect Forward Connection (DFC) operation to the SSP, which then releases the RSP to IP. Sends: Release) message (when SSP and IP communicate with ISUP). The IP releases the channel occupied and transmits a Release Complete (RCL) message to the SSP. IP INAP, on the other hand, releases the dialog with SCP as scheduled termination. The SCP knows that a forward disconnect (DFC) has been successful when the timer (Tdfc) expires, and releases the dialog resource as scheduled termination.

The scheduled termination method possible between the IP and the SCP described above enables the efficient use of the signaling network by reducing the number of messages.

FIG. 4 shows the procedure in the case of (a) to (f) releasing the dialog as a basic termination when performing communication using the INAP protocol between the IP and the SCP. The following describes the release procedure in each case.

First, with reference to FIG. 4A, a case in which the execution of an Assist Reqeust Instruction (ARI) operation fails will be described.

An auxiliary command request (ARI) operation sent when an IP first requests a dialog to be initiated by the SCP is received by the SCP when it fails during processing or when a rejection occurs due to a component error. The TC_End request primitive transmits an error occurrence notification request (TC_U_Error) primitive or a rejection occurrence notification request (TC_R (U) _Reject) primitive indicating a rejection occurrence. Meanwhile, the service controller (SCP) transmits a forward disconnect (DFC) operation to the service switch (SSP), and the IP releases the bearer channel by receiving a disconnection (REL) message from the SSP.

Next, a case in which an error occurs during the operation will be described with reference to FIG. 4B.

IPs operate from the service controller (SCP) to operate special resource services such as announcement broadcasting (PA), prompt and collect user information (PCUI), prompt recording and message (PRM), and message. You can receive EM and Cancel operations. In addition, IP may fail due to an error occurring during these operation processes. IP INAP reports this failure status to the service controller (SCP) using the Error Notification Request primitive, where the IP sends a Continuation Request (TC_Continue request) primitive to determine whether the SCP will terminate or continue the dialog. . If the SCP must be informed of an error and must terminate the conversation with the IP according to the service logic, the SCP will attempt to terminate by sending a TC_End request primitive to the IP.

In addition, with reference to FIG. 4C, the case where rejection occurs locally will be described.

If an error or a successful result is sent to the SCP using the Error Occurrence Request or the Successful Result Request primitive after performing an operation on the IP, the rejection may occur due to a component error in the SCP Question and Answer Application (TCAP) 600. have. At this time, the service controller intelligent network application protocol (SCP INAP) reports this fact as a TC_L_Reject indication and determines the termination of the dialog in the service logic (SLP). According to this termination decision, the IP receives the basic termination request primitive together with the TC_R_Reject request primitive. On the other hand, the service switch (SSP) receives a forward disconnect request (DFC) from the service controller (SCP) and attempts to disconnect from the IP.

A case in which rejection occurs in the service controller intelligent network application protocol (SCP INAP) will be described with reference to FIG.

As in the case of (c) of FIG. 4 described above, when the rejection occurs but the SCP INAP detects this, if the dialog is determined by the service logic (SLP) to terminate the dialog, the basic termination request together with the rejection notification request (TC_U_Reject) primitive is required. Send primitives to IP The SSP also attempts to disconnect from the SSP first.

In addition, referring to FIG. 4E, the case of performing user information collection / message recording (PCUI / PRM) operation will be described.

When SCP requests to collect user information or perform a message recording operation by IP, if the value of disconnrctFromIPForbidden item is 'false', the IP requests successful result after successfully performing the operation and inserting the result value. Along with the primitive, send a basic exit request primitive to SCP. Meanwhile, to release the connection with the SSP, a connection release message is transmitted to the SSP.

A case of performing an announcement broadcast transmission (PA) operation will be described with reference to FIG. 4 (f).

If SCP transmits the announcement broadcast operation to IP, if the announcement end port value is 'true' and the IP initiation disconnection item value is 'false', the IP broadcast announcement announcement (PA) is performed. After successful execution, the dialog is terminated by sending a basic termination request to the SCP with a TC_Invoke request primitive containing a Specialized Resource Report (SRR) operation. Also, to disconnect from the SSP, a disconnect message is sent to the SSP.

The present invention as described above releases the dialog set for the dialogue with SCP after providing the special resource service according to the instruction for performing the various operations requested by the next generation intelligent network intelligent information providing system (AIN IP) from the service controller (SCP). It is possible to use signal network resources efficiently.

Claims (4)

Service Controller (SCP) among the functions of the Intelligent Network Application Protocol (INAP), which processes intelligent network services through interaction with Service Controller (SCP) and Service Switcher (SSP), which are implemented in next generation intelligent network (AIN) Intelligent Information System (IP). In the method of closing the dialog set up for the conversation with, When the IP receives an announcement broadcast transmission (PA) operation instruction from the SCP, when the IP receives a message deletion (EM) operation instruction from the SCP, and the SCP is sent to a service exchange (SSP) according to service logic. A method for terminating a dialogue in a next-generation intelligent network intelligent information providing system, characterized in that a predetermined termination is performed without exchanging a message for terminating a dialogue by an IP and an SCP by using any one of requesting the connection with the IP. The method of claim 1, The announcement broadcast operation is performed, Among the parameter items of the announcement broadcast (PA) operation, the announcement announcement end value indicating that the announcement is not reported to the SCP after the announcement broadcast is completed, and the IP-initiation disconnection request to try to disconnect the service switch (SSP) after performing the operation. The IP receiving the value from the SCP; Transmitting, by the IP, an announcement broadcast operation during the timer driving time of the SCP after the reception, and sending a scheduled end request to the question-and-answer function application unit (TCAP); And Dialogue in the next generation intelligent network intelligent information providing system, characterized in that the SCP is assumed to have been successfully performed when the timer operation expires after the instruction to send the announcement broadcast operation, and the TCAP is scheduled to be terminated. Termination method. The method of claim 1, Performing the message delete operation, If the value of the IP initiation disconnection clause among the message deletion operation items received from the SCP is 'false', the message deletion operation is performed during the timer operation time of the SCP, and the scheduled termination request is requested. Transmitting to; If the SCP expires after the message deletion operation instruction, the message deletion operation is considered to have been successfully performed, and the step of requesting the end of the dialog in the next generation intelligent network intelligent information providing system comprising the step of requesting the preliminary termination to the TCAP . The method of claim 1, The SSP start connection release is performed by The SCP sending a forward disconnect operation to a service switch (SSP); The SSP receiving the transmitted operation, transmitting a disconnection message to the IP; And After the IP sends a disconnection completion message to the SSP, the scheduled termination of the dialog with the SCP is released, and the SCP assumes that the forward disconnect is successfully performed when the timer started after the forward disconnect operation is sent. Ending method of the dialog in the next generation intelligent network intelligent information providing system, characterized in that consisting of the step of performing a scheduled end.

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