KR20000065695A - Follow-on call service method of intelligent network - Google Patents

Abstract

PURPOSE: A method for servicing consecutive calls in an intelligent network(IN) is provided to use a basic call state model(BCSM) of an IN capacity set(CS)-1, operations of an IN CS-2, a detection point(DP) and a point in call(PIC), to embody consecutive calls of the IN CS-1 form, so as to provide services without repeated authentication confirming procedures while calling under a unreleased IN service call. CONSTITUTION: A suspend event is detected, and an intelligent network application protocol(INAP) of an intelligent network(IN) capacity set(CS)-1 is extended to report the event. INAPs of an ID CS-2 related to a LEG is supplemented for a receiver to re-respond. A CS-2 detection point(DP) is supplemented to detect a transmission suspend, a receiving suspend, a transmission re-respond, and a receiving re-respond. A CS-2 point in call(PIN) for the transmission suspend and the receiving suspend is supplemented. A service control function(SCF) block collects number information related to an IN service of a transmitting subscriber. A service control point(SCP)block arms the transmission suspend and a transmitting disconnected detection point, before the transmitting subscriber calls to detect a consecutive call service. A call is formed between a transmitter and the receiver, and when a service switching function(SSF) block detects the transmission suspend and the receiving suspend, a receiving leg is released by using a leg operation for being responded by a supplemented receiver. The SCF block omits a re-authentication procedure of the transmitting subscriber, and collects numbers of the transmitting subscriber to try consecutive calls, through number translations of information related to the IN service of the transmitting subscriber.

Description

Continuous call service method of intelligent network {FOLLOW-ON CALL SERVICE METHOD OF INTELLIGENT NETWORK}

The present invention relates to an intelligent network (IN) service, and more particularly, to a continuous call service method of an intelligent network that provides a continuous service without repetitive authentication procedure when a new call is attempted while the call of the intelligent network service is not completely released. It is about.

In the intelligent network, communication service has shifted from voice service to voice data image, uniform service has changed to individualization-oriented service, and communication service has changed from bulk small to small quantity. It is a method to organize voice and signal systems into separate communication networks by tying them into a signal method, and by installing a separate large computer and database on the existing communication network, by centralizing intelligent network service processing functions here, various communication services can be efficiently implemented and It is a highly operational network. These intelligent network services are increasing in service type and function due to the diverse needs of users and network operators and the development of No.7 common channel signaling technology.

On the other hand, ITU-T defines an intelligent network capability set (IN CS) as the target of standardization activities and targets at a specific evolutionary stage, and standardizes it. Name it CS-1, IN CS-2, IN CS-3, ...

The characteristics of IN CS-1 recommended as the first-level intelligent network capability include intelligent network conceptual model (INCM), basic call state model (BCSM), and intelligent network application for the implementation of service-independent network. The concept of IN Application Protocol (INAP) has been established, and the characteristics of IN CS-2 recommended by the two-stage intelligent network capability extends the IN CS-1 to the target network as well as the fixed network. Therefore, the provision of partial mobile service and multimedia service is also considered.

A simplified structure of this intelligent network is shown in FIG. Referring to Figure 1 the structure of the intelligent network;

The service control point (SCP) 110 has service logic programs and data necessary for intelligent network service processing, and is connected to a service exchanger (SSP), an intelligent information providing system (IP), and the like through a signaling network. As a distributed function block in this regard, a service control function (SCF) block 111 is provided by the service control system 110 to perform intelligent network call control in processing additional services or user requests.

The service switching point (SSP) 120, when used as a single station exchange, allows the user to access the network and provides the necessary switching function for intelligent network call connection. To this end, the service exchanger 120 functionally includes a service exchange function (SSF) block 121 and a call control function (CCF) block 122. The call control function block 122 provides call / service processing and control and is an instance requested by an unillustrated Call Control Agent Function block that is responsible for the interface between the user and the CCF 122. To manipulate or release the call exchange function block 121 and to connect or associate the Call Control Agent Function block entity included in a specific call or service instance at the request of the service switching function block 121, It manages the relationship between the call control agent function entities associated with the call and detects the trigger event and delivers it to the service switching function block 121.

The service switching function block 121 is responsible for a service switching function connected to the call control function block 122 and provides functions for interaction between the call control function block 122 and the service control function block 111. do. The service switching function block 121 expands the logic of the call control function block 122 to recognize a service control trigger and to interact with the service control function block 111.

Intelligent Peripheral (IP) 130 provides customized resources such as customized announcements, speech recognition, speech synthesis, voice recording, DTMF digit collectors, protocol converters, fax transceivers, audio bridges, information distribution bridges, and the like. It may be connected to one or more service control system 110 and the service switcher 120 through the signal network to provide a flexible interaction between the user and the intelligent network. Functionally, it includes a Specialized Resource Function (SRF) block 131 to provide special resources required for the execution of the service.

The process of performing the conventional continuous call service in the intelligent network of such a structure is shown in FIG. 1 and 2, a service method of a conventional intelligent network continuous call will be described briefly.

The flow of FIG. 2 is an outcall of a universal personal telecommunication service (UPT: UPT) through service access number, universal personal telecommunication (UPT) number, password, and incoming number input. For example.

In steps 201 to 221, a call is connected in the step of collecting information necessary for the UPT service from the IP 130, and from step 222 to the last step, the caller releases the call and proceeds the call without reauthentication. Signal flow for (FOC: Follow-on Call).

In the continuous call service of the conventional intelligent network as shown in FIG. 2, when the called party releases a call, the service control function block 110 sends a "Suspend" event to the service switching function block 221 and the call control function block 222. (event) is regarded as a "Release" event so that a continuous call can be performed, but the conventional IN CS-1 model does not detect a detection point (DP) associated with the hold point, so that the caller's call Once released, no re-answer was possible.

That is, in the continuous call service of the conventional intelligent network, the service control function block 111 recognizes the "hold" event as the "release" event (O_Disconnect or T_Disconnect) to the service switching function block 121 / call control function block 122. By instructing the subscriber was able to make a continuous call, but when the called party was released, there was a problem that can not respond to the call.

Accordingly, an object of the present invention is to provide a continuous call service method of an intelligent network that allows the service to be continuously provided without a verification process when attempting a new call in a situation where the call of the intelligent network service is not completely released. Is in.

In order to achieve the above object, the present invention provides a first process for extending the intelligent network application protocol of the intelligent network CS-1 to detect a pending event and report an event, in a continuous call service method of an intelligent network, and the called party responds to a re-response. The second process of adding some intelligent network application protocols of the intelligent network CS-2 related to legs, and the addition of a CS-2 detection point that can detect outgoing call, incoming call waiting, outgoing call response, and incoming call response. A third step of adding a CS-2 call processing point for outgoing hold and incoming call holding; and a fifth step of collecting number information related to the general personal communication service of the calling party in advance from the service control function block; The originating hold and originating disconnect detection points may be removed from the service control function block before proceeding with a call to detect that the originating subscriber is attempting continuous call service. A sixth step of arming, and a leg operation that allows the called party added in the second step to respond again when the call is formed between the caller / caller and detects the call hold or call hold in the service exchange function block. In the service control function block through the seventh process of releasing the leg of the called party, and the number translation of the general personal communication service related information of the calling party collected in the fifth process after releasing the leg of the called party. An eighth process of omitting the re-authentication procedure of the calling party subscriber and collecting the calling party subscriber number and attempting a continuous call is performed.

1 is a structural diagram of a general intelligent network

2 is a flow diagram of a continuous call service of the conventional intelligent network CS-1.

3 is a flow diagram of a continuous call service in the form of an intelligent network CS-2 according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as much as possible even if they are displayed on different drawings. In addition, in the following description, numerous specific details, such as specific process flows, are set forth in order to provide a more thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

The structure of the intelligent network according to the present invention is the same as that of FIG. 1, and the new function performance of the intelligent network functional blocks for performing the continuous call service method according to the present invention will be described in detail with reference to FIG.

The difference between the continuous call of the intelligent network (IN) CS-2 and the continuous call of the IN CS-1 is the ability to detect a "hold" event, and the ARM and the event of the detection point (DP) to the service control function block 111. It is possible to report the addition of the O_Suspend and T_Suspend detection points belonging to the definition of some basic call state models (BCSM) of CS-2 to the IN CS-1 call model and the detection. Arming of reporting and detection of point events is made possible by the Intelligent Network Application Protocol (INAP) message extension. According to the present invention, some additional resources of CS-2 INAP operation (DisconnectLeg) are required, and a summary of the resources is as follows.

1. Extension of some INAPs in CS-1: Extension of INAP to detect "hold" events and report events

2. Addition of some IN-2 CS-2: INAP related to the leg so that the called party can "respond"

3. Addition of some CS-2 DPs: Call Park, Call Block, Call Answer, Call Answer

4. Addition of some CS-2 PICs: call waiting, call waiting

The scope of CS-2 to support consecutive calls in Local SSP is limited to the support of EventTypeBCSM data type (enumeration type) and DisconnectLeg INAP operations. Backward compatible with CS-1. In order to support the CS-2 type continuous call, four additional detection points (DPs) and two call processing points (PICs) are additionally supported in the CS-1 call model. The detection point is originating hold and incoming call holding, originating responsiveness and incoming call responsive DP, and the call processing point is an originating hold and incoming call holding PIC.

The added detection point and call processing point of the CS-2 and a description thereof are described in Table 1 below.

division DP & PIC Explanation Detection Point (DP) O_Suspend Detect the call on hold T_Suspend Detect an instruction from the user to T_BCSM when a call is put on hold O_Re-Answer Detect instructions sent when called party reconnects call T_Re-Answer Detect an instruction from the user to T_BCSM that the call has been resumed Call Processing Point (PIC) O_Suspend When the called party suspends originating and receives a re-answer from T_BCSM, it can reconnect the called / called party. T_Suspend The call is received on hold and the physical resource is associated with the call resource to which it is connected.

In addition, Table 2 below is the detection point event-related reporting and leg operations are changes or additions for the implementation of the continuous call.

direction INAP operation Explanation SSF → SCF EventReportBCSM CS-1 extension required to report outbound and incoming call detection events SCF → SSF DisconnectLeg Added support for CS-2 INAP operation support recipients to respond within a certain time RequestReportBCSMEvent CS-1 extension required to report outbound and incoming call detection events

In the continuous call service method according to the present invention, first, the IP 130 has already collected information such as service access number, UPT number, account number, and password required by the SCF 111 for continuous call service. In the state, the SCF 111 arming the CCF 122 with an outgoing hold or an incoming hold. Then, when a call is established between the caller / caller and the call hold or call hold is detected, the CCF 122 notifies the SSF 121 and the SSF 121 notifies the SCF 111. At this time, the SCF 111 separates and releases the leg of the called party using the DisconnectLeg operation. Subsequently, the SCF 111 connects with the IP 130 in order to attempt a continuous call, collects the number without re-authentication of the user, and continues the call through number translation.

This continuous call service process according to the present invention will be described in detail through the flow of FIG. 3 is a flowchart of a continuous call service in the form of an intelligent network CS-2 according to an embodiment of the present invention.

The process omitted in FIG. 3 is a process in which the SCF 111 collects information such as a service access code, a password, an account number, and an UPT number, which the caller input by IP announcement. Since this is the same as the conventional one, it is omitted.

When the SCF 111 collects information such as a service access code, a password, an account number, and an UPT number, which the caller has already input by IP announcement as necessary, the SCF 111 provides the subscriber with continuous call service. The O_Suspend and O_Disconnect detection points are armed with the SSF 121 using a RequestReportBCSMEvent (signal 301) before proceeding with the call to detect an attempt (signal 302). Since the SCF 111 cannot know in advance the type of phone (analog or ISDN) used by the called party, two detection points are armed. If using ISUP, the outgoing hold and incoming hold detection points are triggered by the CCF 122 initiating the hold.

The SSF 121 then sends a message (MakeOutgoingCall: 303 signal) to connect the call to the called number of the result by number translation to the CCF 122.

When the CCF 122 receives the message to connect the call to the called party from the SF 121, the CCF 122 sends a ring signal (IAM: 304 signal) requesting call setup to the called party.

In response to the called party, an address completion message (ACM) / response message (ANM) is notified to the CCF 122 through the 305 signal from the called party.

If, after the 305 signal progresses, when the call is unilaterally disconnected, the CCF 122 attempts to make a new call while the call of the intelligent network service is not completely released. A signal 306 is sent to the SSF 121, and the SSF 121 detects O_Suspend and O_Disconnect detection point events.

Then, the SSF 121 reports an EventReportBCSM (307 signal) to the SCF 111 as a result report for the RequestReportBCSMEvent (301 signal).

The SCF 111 sends a DisconnectLeg Operation (308 signal) to the SSF 121 to release the called party to continue the call. At this point, the called party may respond to the call within a certain time, which may be achieved by using an incoming call answering detection point.

The SSF 121 sends a "release" message (309 signal) to the CCF 122 to release the call, and the CCF 122 sends a REL (310 signal) signal requesting the release of the call line to the called party. When a call release completion message (RLC: 311 signal) is received from the called party, the SCF 111 connects with the IP 130 to attempt a continuous call and collects a number other than the first one collected without a user reauthentication procedure. Collect it to continue the call.

Here, the RLC signal is a signal for notifying the REL transmitting station that it is in a state of releasing the line and being used for another call when receiving the REL signal.

The subsequent signal flow process is omitted in FIG. 3, in which case the caller's service access code, password, account number, and UPT during the process of reconnecting the calling party to the called party which unilaterally disconnected the call in the 306 signal flow. Without the re-authentication process such as information input process and collection process such as number, only the input of the called party is required by using the information already collected in the IP 130, and the subsequent process is the same as the incoming process flow.

That is, in the continuous call service method according to the present invention, when the called party is released by adding the CS-1 partial INAP and the CS-2 partial INAP, DP, PIC as shown in Table 1 and Table 2, the originating BCSM (basic call state) Model) transitions to the originating pending PIC (call processing point), and reconnects the call if an outgoing re-answer is made in this state.

On the other hand, in the detailed description of the present invention has been described with reference to specific embodiments, of course, various modifications are possible within the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention does not completely release a call of an intelligent network service by implementing a CS-2 type continuous call using the basic call state model (BCSM) of the intelligent network CS-1, some operations of the CS-2, and DP and PIC. If you try to make a new call in a situation where you do not have the effect that you can continue to receive services without repeated authentication.

Claims (6)

In the continuous call service method of the intelligent network, A first step of extending the intelligent network application protocol of the intelligent network CS-1 to detect a pending event and report the event; A second step of adding some intelligent network application protocols of the intelligent network CS-2 related to the leg so that the called party can respond again; A third step of adding a CS-2 detection point that can detect outgoing call, incoming call, outgoing call response, and incoming call response; A fourth step of adding a CS-2 call processing point for the call hold and the call hold; A fifth process of collecting the intelligent network service related number information of the calling party in advance from the service control function block; A sixth step of arming the originating hold and originating disconnect detection points in the service control function block before proceeding with a call to detect that the originating subscriber is attempting continuous call service; When the call is established between the caller / caller and the call exchange or call hold is detected by the service exchange function block, the leg of the called party is released by using a leg operation that allows the called party added in the second step to respond again. The seventh process, After the release of the leg by the called party, the calling party collects and omits the re-authentication procedure of the calling party subscriber from the service control function block by translating the number of information related to the intelligent network service of the calling party subscriber previously collected in the fifth process. A continuous call service method of an intelligent network, comprising the eighth process of collecting a subscriber's number and attempting a continuous call. The method of claim 1, The intelligent network application protocol of the intelligent network CS-1, which is extended in the first process, is a protocol for reporting an originating hold and an incoming hold detection point event from a service switching function block to a service control function block. The method of claim 2, Some intelligent network application protocols of the intelligent network CS-2 related to the leg report the call pending and the call pending detection point event from the service control function block to the service exchange function block so that the called party added in the second process can resend. Continuous call service method of an intelligent network, characterized in that the protocol. The method of claim 3, In the seventh step, the outgoing or incoming call is detected when a new call is attempted when the call is not completely released. The method of claim 4, wherein And reconnecting the called party to a corresponding call when a re-answer detection point of the called party is detected within a predetermined time after releasing the leg of the called party in the seventh step. The method of claim 5, The intelligent network service is a continuous call service method of an intelligent network, characterized in that the universal personal communication service (UPT)