KR100898250B1 - Intelligent Network Service Provision System and Method for Telephone Subscriber of MBAC Based Access Gateway - Google Patents

Abstract

The present invention relates to a technology that enables users of a general telephone terminal (POTS terminal) housed in an access gate based on a media gateway control protocol (MEGACO) to use an intelligent network service.

In order to realize the above-described technology, an intelligent network service providing apparatus applied to a packet switching network performing call processing based on a MEGACO (Media Gateway Control Protocol), wherein the intelligent network service processing is performed from a MEGACO-based access gateway connecting a POTS terminal to a packet switching network. A soft switch for performing protocol conversion between the MEGACO and the INAP of the intelligent network by interworking with the SCP of the intelligent network and the access gateway; Under the control of the SCP through the soft switch to transmit the announcement to the POTS terminal according to the use of the intelligent network service, collects the digits input from the POTS terminal and transmits the MEGACO-based media server to the SCP through the soft switch It is configured to include.

Description

System and method for providing intelligent network service for subscribers of MEACACO based access gateway {subsystem and method for providing intelligent network service for plain old telephony service subscriber of access gateway based media gateway control protocol}

1 is a block diagram of a conventional packet switching network.

2 is a flowchart illustrating a conventional MEGACO call processing procedure.

3 is a block diagram of a packet switched network according to an embodiment of the present invention.

4 is a diagram illustrating an internal configuration of the soft switch of FIG. 3.

5 is a call model configuration of the MEGACO processing unit of FIG.

6 is a diagram illustrating an internal configuration of an application service processor of FIG. 4.

7 is a flowchart illustrating a method for providing an intelligent network service to a subscriber of a MEGACO-based access gateway according to an embodiment of the present invention.

The present invention relates to an intelligent network service providing system and method for a subscriber of a MEGACO-based access gateway, and more particularly, to a POTS (Plain) housed in an access gate based on a media gateway control protocol (hereinafter referred to as MEGACO). Old Telephony Service) The present invention relates to a technology for enabling terminal users to use an intelligent network service.

Next Generation Network (NGN) evolves the existing circuit-switched network-based communication infrastructure based on the packet-switched network, providing broadband multimedia services including voice, data, and video services through one packet-based infrastructure.

However, even if the infrastructure has evolved from the existing circuit-based to the packet-based, it is difficult for the existing POTS subscribers, which are currently accommodated in the circuit-switched network, to switch to packet telephone subscribers at the time, so that in the early stage of evolution, Existing POTS subscribers are accepted as they are so that subscribers can use the existing telephone service without changing the terminal. For reference, a POTS subscriber refers to a subscriber using a general telephone used in the PSTN.

To this end, a media gateway controller (MGC :) is used to replace a local exchange that accepts POTS subscribers with an Access Gateway (AGW) and to control it within a soft switch (SSW) that acts as an exchange within a next-generation network. Install Media Gateway Controller. For control between these two devices, MEGACO, a media gateway control protocol, is used. This protocol is an IP (Internet Protocol) network protocol that controls the media gateway to route calls to desired locations.                         

A call processing system based on the conventional MEGACO protocol will be described with reference to FIG. 1.

As shown in FIG. 1, the POTS terminals 10, 11 are connected to the access gateways 20, 21, and the access gateways 20, 21 are connected to the media gateway controller 31 of the softswitch 30. .

Referring to the functions of the access gateways 20 and 21 and the media gate controller 31, the access gateways 20 and 21 are media gateway devices that convert heterogeneous media, and convert the circuit bearers into packet bearers and convert the packet bearers into circuits. The media gateway controller 31 detects the occurrence of an event from the access gateways 20 and 21 and transmits a message for the MEGACO call processing to the access gateways 20 and 21, thereby converting the data into a bearer. It plays a role of controlling voice call processing between the POTS terminals 10 and 11 corresponding to the originating / receiving terminal connected to (20, 21).

For controlling between the access gateways 20 and 21 and the media gateway controller 31, WEGACO, which is a media gateway control protocol, is used.

The MEGACO call processing procedure between POTS terminals performed by the MEGACO protocol based call processing system shown in FIG. 1 will be described with reference to the flowchart shown in FIG. 2.

When the user A of the POTS terminal 10 connected to the access gateway 20 lifts the handset to make a call to the user B of the POTS terminal 11 connected to the access gateway 21 (S200), the access gateway 20 does this. It detects and sends a MEGACO Notify message to the media gateway controller 31 to notify it (S201).                         

The media gateway controller 31 transmits the dial tone and the digit map by transmitting the MEGACO Modify message to the access gateway 20, and monitors the on-hook event of the user A (S203).

When the subscriber A inputs the called number digit (S204), the access gateway 20 checks whether the collected digits fit the digit map, and then includes the input digit in the MEGACO Notify message to the media gateway controller 31. Transfer (S205).

The media gateway controller 31 analyzes the transmitted destination number digit (S206), and transmits a MEGACO Add message to generate an outgoing leg in the access gateway 20 (S207).

The media gateway controller 31 recognizes that a communication channel between the access gateway 20 and the access gateway 21 should be connected (S208), and transmits a MEGACO Add message to generate an incoming leg to the access gateway 21. (S209).

Upon receiving the MEGACO Add message, the access gateway 21 transmits the information on the incoming leg corresponding to the response of the MEGACO Add message to the media gateway controller 31 (S210) and the POTS terminal 11 of the user B. A ringing tone is output to the POTS terminal 11 to output a ring (S211).

The media gateway controller 31 transmits a MEGACO Modify message to reflect the information on the incoming leg in the incoming leg information of the access gateway 20 (S212), and the access gateway 20 transmits the POTS terminal 10 of the user A. The ring back tone is outputted at S213.                         

On the other hand, when the user B picks up the receiver and the POTS terminal 11 is offhook (S214), the access gateway 21 notifies the media gateway controller 31 via the MEGACO Notify message (S215). A bearer channel is connected between the POTS terminal 10 of A and the POTS terminal 11 of subscriber B (S216).

The media gateway controller 31 sends a MEGACO Modify message to the access gateway 21 and the access gateway 20, respectively, to correct incoming and outgoing leg information, and to monitor whether the subscriber hangs up (on-hook event). S217, S218).

The access gateway 21 receiving the respective MEGACO Modify message commands the output of the ringing tone to the POTS terminal 11 (S219), and the access gateway 20 sends the output of the ringback tone to the POTS terminal 10. Stop (S220).

Subsequently, when the user B hangs up, the access gateway 21 detects the on-hook of the POTS terminal 11 (S221), and sends a MEGACO Notify message to the media gateway controller 31 to notify the on-hook (S222).

The media gateway controller 31 receiving the MEGACO Notify message releases the bearer channel connected between the POTS terminal 10 of the user A and the POTS terminal 11 of the user B (S223), and then inside the access gateway 21. In order to delete the incoming leg information, the MEGACO Subtract message is transmitted (S224), and the MEGACO Subtract message is transmitted to the access gateway 20 to delete the outgoing leg information inside the access gateway 20 (S225).

Subsequently, the media gateway controller 31 monitors off-hooks for the POTS terminal 10 and the POTS terminal 11 by transmitting a MEGACO Modify message to the access gateway 20 and the access gateway 21, respectively (S226). , S227).

As described above, the media gateway controller 31 is capable of basic call processing corresponding to a voice call, but since there is no configuration for interworking with an intelligent network, the media gateway controller 31 provides a call processing service for an intelligent network call generated from a POTS terminal. There was a limitation that can not be provided.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to allow POTS subscribers using a packet switched network to use intelligent network services accommodated in a MEGACO-based access gate.

Intelligent network service providing system for subscribers of the MEGACO-based access gateway to achieve the above object,

An intelligent network service providing apparatus applied to a packet switched network performing call processing based on a MEGACO (Media Gateway Control protocol),

A soft switch for interworking the SCP and the access gateway of the intelligent network by performing protocol conversion between the MEGACO and the INAP of the intelligent network when a request for intelligent network service is requested from a MEGACO-based access gateway connecting a POTS terminal to a packet switching network;

MEGACO-based media that transmits a guide broadcast according to the use of an intelligent network service to the POTS terminal under control of the SCP through the softswitch, collects digits input from the POTS terminal, and delivers the digits to the SCP through the softswitch. Characterized in that it comprises a server.

In addition, the intelligent network service providing method for subscribers of the MEGACO-based access gateway to achieve the above object,

An intelligent network service providing method applied to a packet switched network performing call processing based on MEGACO,

A first step of analyzing a call and determining whether the call is an intelligent network service request call when a call is generated from a POTS terminal accommodated in the packet switching network;

A second step of converting a MEGACO message for processing the MEGACO call into an INAP message of the intelligent network and performing a service trigger to the SCP of the intelligent network if the call is an intelligent network service request call; And

When the intelligent network service logic of the SCP is activated, a third process of interworking the SCP to the packet-switched network through protocol conversion between the INAP of the intelligent network and the MEGACO.

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

The intelligent network service providing system for the subscriber of the MEGACO-based access gateway according to an embodiment of the present invention, as shown in Figure 3, a plurality of access gateway (20, 21), soft switch 40, media server 50 It is composed of a service controller (hereafter referred to as SCP: Service Control Point) (60).                     

Next, the functions of the above components will be described in detail. Components that perform the same functions as those of FIG. 1 are given the same numbers as those of FIG. 1, and detailed description thereof will be omitted. .

The soft switch 40 detects the telephone number corresponding to the intelligent network service from the POTS terminals 10 and 11 connected to the access gateways 20 and 21, and transmits the detected telephone number to the SCP 60, and the service from the SCP 60. Upon receiving the logic processing result, the media server 50 requests resource processing or performs call routing through the access gateways 20 and 21.

The media server 50 is implemented in a packet-based next-generation network and supports only the MEGACO protocol for media control, and transmits an announcement broadcast related to an intelligent network service to the POTS terminal under the control of the soft switch 40, or inputs from the POTS terminal. Function to collect digits.

SCP (60) is equipped with service logic for performing various intelligent network services, for example, lifetime number service, telephone room service, prepaid card service, etc., such as translation of the actual called number by the service logic, call announcements, etc. Performs a function of transmitting a command to the soft switch 40. The SCP 60 communicates with the soft switch 40 using the INAP CS-2 protocol.

The soft switch 40 described above is composed of a MEGACO call processing unit 41, an application service processing unit 43, a media resource relay unit 44, and a protocol conversion unit 45 as shown in FIG.                     

The function of each part shown in FIG. 4 is demonstrated concretely.

The MEGACO call processor 41 performs a function of processing an incoming / outgoing signal of a POTS terminal connected to the access gateways 20 and 21 according to an internal INAP originating and incoming call model.

The application service processor 43 manages the information of the trigger detection point armed in the intelligent network service providing process and the event detection point armed by the request of the SCP 60, and the basic MEGACO call processing proceeded by the MEGACO call processor 41 It detects the trigger detection point and the event detection point that occur during the process of the procedure to trigger the service to the SCP (60), and receives and processes the service logic execution result transmitted from the SCP (60).

The media resource relay unit 44 delivers the media resource processing request transmitted from the SCP 60 to the media server 50, and delivers the processing result from the media server 50 to the SCP 60. .

The protocol conversion unit 45 converts the MEGACO message transmitted from the application service processing unit 43 or the media resource relay unit 44 into an INAP message and delivers the message to the SCP 60, and delivers the INAP message transmitted from the SCP 60. It converts the message into the MEGACO message and delivers it to the application service processor 43 or the media resource relay 44.

Next, a method of mapping an INAP originating and incoming call model and a MEGACO call flow performed by the MEGACO call processor 41 will be described in detail with reference to FIG. 5.

The INAP originating and incoming call model is based on the IN CS-2 model, and detailed processing procedures such as exceptions will be omitted for convenience of description. The MEGACO call flow diagram is based on the MEGACO call flow diagram described in FIG.                     

As shown in FIG. 5, the MEGACO call processor 41 is configured with an outgoing INAP call model 41a and an incoming INAP call model 41b. The outgoing INAP call model 41a and the incoming INAP call model 41b are MEGACO. A call processing point related to call processing and a detection point related to INAP call processing (trigger detection point and event detection point) are formed in a matched state.

The MEGACO call processor 41 detects point information (detection point number) corresponding to a predetermined MEGACO Notify message transmitted from an outgoing access gateway or an incoming access gateway using the outgoing INAP call model 41a and the incoming INAP call model 41b. ) Is transmitted to the application service processor 43, and activates the call processing point according to the MEGACO call flow in conjunction with the application service processor 43.

As shown in FIG. 6, the application service processor 43 includes a detection point information manager 43a and a call processing operation controller 43b.

The detection point information management unit 43a manages the detection point information of the MEGACO call processing unit. The detection point information includes a detection point number, a detection point type, service processing request information, and the like. Here, the detection point number is the same as the detection point number defined in the INAP call model of the MEGACO call processing unit, and the detection point type is the trigger detection point set by the service provider or the network operator when the new service is introduced, and the SCP processes the service. The event detection point is set by requesting the application service processing unit to report the occurrence of a specific event in the outgoing / incoming call model in the middle. The service processing request information includes the service message request information for each detection point, That is, it corresponds to the MEGACO message (Notify) to be triggered by SCP (60).                     

In addition, the call processing operation control unit 43b is the detection point information received from the MEGACO message or the detection point information management unit 43a received from the MEGACO protocol conversion unit 45. Correspondingly, the call processing point state of the MEGACO call processing unit 41 is controlled. The operation of the call processing operation control unit 43b is preferably changed according to the application service.

On the other hand, the conversion between the MEGACO protocol and the INAP protocol performed in the protocol conversion unit 45 is shown in Table 1, the INAP message is a message to be processed in the application service processing unit 43 for call routing (SCP-SSW). ) And a message (SCP-SSW) to be processed by the media resource relay unit 44 for media resource processing.

MEGACO INAP SCP-SSW (Application Service Processing Department) SCP-SSW (Media Resource Relay Department) Add InitialCallAttempt, Connect, RequestReportBCSM ConnectToResource Modify RequestReportBCSM, Connect Cancel PlayAnnouncement, PromptAndCollectUserInformation Subtract Release, DisconnectLeg, SplitLeg DisconncetForwardConnection Move MoveCS Notify InitialDP, EventReportBCSM, CallInformationReport SpecializedResourceReport, PromptAndCollectUserInformationResult Audit Value RequestEveryStatusChange, RequestCurrentStatusReport, RequestFirstStatusMatchReport, CancelStatusReportRequest, StatusReport AuditCapabilities - ServiceChange - -

<Table 1> Conversion Table between MEGACO Protocol and INAP Protocol                     

As shown in Table 1, the MEGACO Add message, which adds an incoming / outgoing end to a call, is converted to INAP's InitialCallAttempt, Connect, RequestReportBCSM, or ConnectToResource message, which changes the properties for the originating / outgoing end. The MEGACO Modify message, which is a message, is converted to RequestReportBCSM, Connect, Cancel, or PlayAnnouncement, PromptAndCollectUserInformation messages of INAP.

The MEGACO Subtract message, which deletes incoming / outgoing end from one call, is converted into Release, DisconnectLeg, SplitLeg, or DisconnectForwardOperation message of INAP, and the MEGACO Move message, which moves the originating / going end of one call to another call Are converted to MoveCS messages.

In addition, MEGACO Notify message, which is a message for reporting the event occurring at the terminal, is converted into INAP's InitialDP, EventReportBCSM, CallInformationReport or SpecializedResourceReport, PromptAndCollectUserInformationResult message, and the current status, event, signal, and statistical information of the terminal is converted. MEGACO AuditValue messages, which are messages for auditing, are converted to INAP's RequestEveryStatusChange, RequestCurrentStatusReport, RequestFirstStatusMatchReport, CancelStatusReportRequest, and StatusReport messages.

In addition, the MEGACO AuditCapability message, which is a message for auditing the state, events, signals, and statistical information allowed to the endpoint and the service capability of the endpoint has changed, or the ServiceChange message, which is a message for changing the service capability of the endpoint, There is no INAP message.

Hereinafter, a method of providing a postpaid card service corresponding to an intelligent network service to a subscriber of a MEGACO-based access gateway according to an embodiment of the present invention will be described in detail with reference to the flowchart shown in FIG. 7.

When the user A of the POTS terminal 10 accommodated in the access gateway 20 uses a postpaid card service corresponding to the intelligent network service, the access gateway 20 detects this and notifies off-hook to the soft switch 40. The Notify message for transmitting is transmitted (S702).

In more detail, the Notify message is transmitted to the MEGACO call processing unit 41 of the soft switch 40 (see FIG. 5), and the MEGACO call processing unit 41 corresponds to the Notify message through the originating INAP call model. The detection point 1 is transmitted to the application service processor 43. Therefore, since the service processing request corresponding to the detection point 1 is not registered, the detection point information management unit 43a of the application service processing unit 43 transmits the detection point number, that is, the detection point 1 and "" to the call processing operation control unit 43b. Next call processing point "information, and the call processing operation control unit 43b The call processing point 2 of the MEGACO call processing unit 41 is activated so that the MEGACO call processing that performs the corresponding operation is performed.

After the alternative authentication is performed on the originating attempt authority by the call processing point 2, the application service processing unit 43 activates the call processing point 3, and the MEGACO call processing unit 41 digits together with the dial tone by the call processing 3 The map is sent and a MEGACO Modify message for monitoring the on-hook is transmitted to the access gateway 20 (S706).                     

Subsequently, when the user A requests the postpaid card service by inputting the postpaid card service identification number and the card number (S707), the access gateway 20 sends the digits input through the MEGACO Notify message to the MEGACO call processing unit of the soft switch 40. Transfer to step 41 (S708).

When the detection point 5 is transmitted to the application service processor 43 of the MEGACO call processor 41, the application service processor 43 activates the call processing point 4 of the MEGACO call processor 41, which causes the MEGACO processor 41 to activate the call point 4. The collected digit and the detection point 7 are transmitted to the application service processor 43. The application service processor 43 analyzes the digit and sequentially activates the call processing point 5 and the call processing point 6 of the MEGACO call processing unit 41 to generate a MEGACO Add message for generating an outgoing leg to the access gateway 20. Transmit (S710).

The detection point information manager 43a of the application service processor 43 transmits a Notify message for the service trigger to the protocol converter 45 when the call is determined to be an intelligent network call.

The protocol converter 45 converts the MEGACO Notify message into an InitialDP message, which is an INAP message, and transmits the message to the SCP 60 (S711), and the protocol converter 45 is included in the Notify message. The Notify message is converted into one of an InitialDP message, an EventReportBCSM message, a CallInformationReport message or a SpecializedResourceReport message, and a PromptAndCollectUserInformationResult message based on the parameter items and contents.

SCP (60) receiving the INAP InitialDP message performs the postpaid card service logic (S712), and the media server connection message INAP to the protocol conversion unit 45 of the soft switch 40 to connect the media resources for password collection. The ConnectToResource message is transmitted (S713).

The protocol conversion unit 45 converts the INAP ConnectToResource message into a MEGACO Add message for generating the incoming leg using <Table 1> and transmits the message to the media server 50 through the media resource relay 44 (S714). The application service processor 43 activates the call processing point 8 and transmits a Modify message for changing the incoming leg information of the user A of the POTS terminal 10 to the POTS terminal 10 by the access gateway 20. The bag is output (S716).

Subsequently, a bearer channel between the media server 50 and the access gateway 20 is set by the soft switch 40 (S717), and the SCP 60 guides the broadcast to the protocol conversion unit 45 of the soft switch 40. The INAP PromptAndCollectUserInformation message for transmission and collection of card numbers is transmitted (S718).

Accordingly, the protocol conversion unit 45 converts the INAP PromptAndCollectUserInformation message into a MEGACO Modify message using <Table 1> and transmits it to the media server 50 through the media resource relay unit 44 (S719). Information of the incoming leg is changed by 50, the announcement is sent, and the password is collected (S720).

When the password is collected from the POTS terminal 10, the media server 50 transmits a MEGACO Notify message including the collected card number to the media resource relay 44 of the soft switch 40 (S721). The protocol conversion unit 45 receiving the MEGACO Notify message from the relay unit 44 converts the MEGACO Notify message into a PromptAndCollectUserInformationResult message and transmits the message to the SCP 60 (S722).

Subsequently, the SCP 60 transmits an INAP DisconnectForwardConnection message to the protocol conversion unit 45 of the soft switch 40 to release the bearer connection between the POTS terminal 10 and the media server 50 (S723). As the conversion unit 45 transmits the MEGACO Sbutract message to the media resource relay unit 44 to delete the incoming leg corresponding to the INAP DisconnectForwardConnection message, the media resource relay unit 44 receives the incoming leg of the media server 50. By deleting the, bearer connection between the POTS terminal 10 and the media server 50 is released, and the resources are reduced accordingly (S723).

Subsequently, after authenticating the password, SCP 60 transmits an INAP Connect message for connection of the called terminal to protocol conversion unit 45 of soft switch 40 (S725), and protocol conversion unit 45 transmits the INAP. As the Add message for generating the incoming leg, which is a MAGACO message corresponding to the Connect message, is transmitted to the application service processor 43, the application service processor 43 activates the call processing point 16 of the MEGACO call processor. In step 20), the MEGACO Add message for generating the incoming leg is transmitted (S726).

The POTS terminal 11 corresponding to the called terminal is ringed by the access gateway 20 receiving the MEGACO Add message (S727), and the POTS terminal 11 is offhook (S728). When the ?? MEGACO Notify message for off-hook notification is transmitted from the access gateway 21 (S730), the bearer channel between the calling access gateway 20 and the called access gateway 21 is opened by the soft switch 40. In connection, the voice call between the originating POTS terminal 10 and the destination POTS terminal 20 becomes possible (S731).

Meanwhile, the application service processor 43 of the soft switch 40 sequentially activates the call processing point 8 and the call processing point 9 of the MEGACO processor 41 to modify the incoming leg information to the originating access gateway 20. The MEGACO Modify message for the message and the on-hook monitoring is transmitted (S729), so that the bearer channel between the originating access gateway 20 and the destination access gateway 21 is connected.

Subsequently, the MEGACO call processor 41 of the soft switch 43 transmits a Modify message for on-hook monitoring to the destination access gateway 21 under the control of the application service processor 43 (S732).

In the above-described state, when the incoming POTS terminal 11 is on-hook and a Notify message for notifying the on-hook state is transmitted to the MEGACO call processing unit 41 of the soft switch 40 (S734), the soft switch 40 is a subscriber. The bearer channel connected between A and subscriber B is released (S735).

Subsequently, the application service processor 43 of the soft switch 40 activates the call processing point 18 and the call processing point 10 in the MEGACO call processing unit 41 to delete the incoming leg information of the access gateway 21. After transmitting the message and the MEGACO Modify message for off-hook detection (S736, S738), the MEGACO Subtract message for deleting outgoing leg information to the access gateway 20 and the MEGACO Modify message for off-hook detection (S737). , S739).

According to the present invention as described above, even if the existing circuit-switched network is switched to a packet-switched network, POTS subscriber having an existing telephone can provide not only basic telephone service but also intelligent network service.

In addition, according to the present invention, by allowing an access gate that does not support the No.7 protocol to support the No.7 protocol through a soft switch, it is possible to provide an intelligent network service to a POTS subscriber without additional equipment installation.

On the other hand, the present invention is not limited to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, such modifications and changes should be regarded as belonging to the following claims. will be.

Claims (7)

An intelligent network service providing apparatus applied to a packet switched network performing call processing based on a MEGACO (Media Gateway Control protocol), A soft switch for interworking the SCP and the access gateway of the intelligent network by performing protocol conversion between the MEGACO and the INAP of the intelligent network when a request for intelligent network service is requested from a MEGACO-based access gateway connecting a POTS terminal to a packet switching network; MEGACO-based media server that transmits the guidance broadcast according to the use of the intelligent network service to the POTS terminal under the control of the SCP through the soft switch, collects digits input from the POTS terminal, and delivers the digits to the SCP through the soft switch. Intelligent network service providing system for subscribers of the MEGACO-based access gateway, characterized in that configured to include. The method of claim 1, The soft switch, A protocol conversion unit for performing protocol conversion between the MEGACO and INAP; A MEGACO call processing unit for matching the INAP detection point corresponding to the MEGACO message according to the MEGACO call processing transmitted from the access gateway and transmitting the MEGACO message according to the MEGACO call processing to the access gateway; Analyze the call generated by the POTS terminal based on the INAP detection point transmitted from the MEGACO call processing unit, and if the call is an intelligent network call, perform a service trigger to the SCP through the protocol conversion unit, and the MEGACO call An application service processor controlling the processor to perform the MEGACO call processing; And And a media resource relay unit which relays a media server control signal from the SCP transmitted through the protocol conversion unit to the media server. The method of claim 2, The MEGACO call processing unit includes an outgoing INAP call model and an incoming INAP call model including a call processing point for the MEGACO call processing and a detection point for the INAP call processing, and an intelligent network for a subscriber of a MEGACO-based access gateway. Service delivery system. An intelligent network service providing method applied to a packet switched network performing call processing based on MEGACO, A first step of analyzing a call and determining whether the call is an intelligent network service request call when a call is generated from a POTS terminal accommodated in the packet switching network; A second step of converting a MEGACO message for processing the MEGACO call into an INAP message of the intelligent network and performing a service trigger to the SCP of the intelligent network if the call is an intelligent network service request call; And When the intelligent network service logic of the SCP is activated, a third step of interworking the SCP to the packet-switched network through a protocol conversion between the INAP and the MEGACO of the intelligent network to the subscriber of the MEGACO-based access gateway How to provide intelligent network service. The method of claim 4, wherein The third process is A first step of activating the intelligent network service logic of the SCP and converting it to a MEGACO message and then relaying it to a media server when the INAP message for controlling a media server is transmitted from the SCP; And a second step of the media server collecting information for performing an intelligent network service from the POTS terminal, converting the collected information into an INAP message, and delivering the information to the SCP. Method of providing intelligent network service to subscribers. The method of claim 4, wherein The first process, After matching the INAP detection point corresponding to the MEGACO message, using the INAP detection point to determine whether the destination number input from the POTS terminal is the intelligent network service request call subscriber of the MEGACO-based access gateway How to provide intelligent network service for The method of claim 6, Matching the INAP detection point corresponding to the MEGACO message, An intelligent network service providing method for a subscriber of a MEGACO-based access gateway using an outgoing INAP call model and an incoming INAP call model including a call processing point for the MEGACO call processing and a detection point for the INAP call processing.

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