KR20050068825A - Apparatus and method for providing pots phone with mid-call services on ngn - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a mid-call service apparatus and method of a general telephone in a next-generation communication network.

2. The technical problem to be solved by the invention

The present invention receives a hook flash event (service request) requested from a general telephone user in an Internet protocol (IP) -based next-generation communication network, and receives a mid-call service (especially, a call forwarding service, a three-person call service, etc.) during a telephone call. The present invention provides a mid-call service apparatus and a method thereof for providing a general telephone and an IP terminal, thereby enabling activation of telephone use and improving network utilization.

3. Summary of Solution to Invention

The present invention provides a midcall service apparatus in a packet network (NGN), comprising: an application server for performing call channel control service logic; A media server for transmitting a mid-call service announcement on a corresponding call path under the control of the application server; And controlling and interoperating with an access gateway (AG) to perform a call processing control function for a first terminal based on a general telephone network in the packet network, wherein the first terminal and the second terminal are in a busy state from the first terminal. When requesting a call forwarding service of, 'a third terminal to which the first terminal wants to transfer' is established a new call path between the second terminal, and to release the call connection between the first terminal and the second terminal Soft switch included.

4. Important uses of the invention

Industrial Applicability The present invention is used for a midcall service apparatus in a next generation communication network.

Description

Apparatus and method for providing POTS phone with MID-CALL services on NGN}

The present invention relates to a mid-call service apparatus and method of a general telephone in a next generation network (NGN), and in particular, a general telephone (here, a general telephone is based on a public switched telephone network in an Internet protocol (IP) based next-generation network). Receives the requested hook flash event (service request) from the user and provides mid-call service (especially call forwarding service, three call service, etc.) during the phone call, and provides general phone and IP By providing a variety of services to the terminal, it is to enable the use of the phone and improve the network utilization rate.

In general, the MID-CALL service refers to a service that allows another service to be provided by a request from one of the callers and the called party. A call waiting service that allows you to be notified of a call arriving from a third party, alternating with an ongoing call, or a call hold service that allows the calling or called party to hold a call that is currently in progress. , A call forwarding service that allows a calling or called party to forward a call by entering a third phone number during a call, or by entering a third number at the request of the calling or called party during a call. An example would be a three-party call service for participating in an ongoing call.

This midcall service request is transmitted to the network by briefly pressing the hook button on the calling originating or receiving terminal (ordinary telephone terminal) (hook flash), or pressing the flash button in case of an IP terminal. Done. Ordinary telephone terminals can also use a flash button.

In general, the mid-call service on the telephone in such a communication network may be provided to a telephone user included in a private network using a PBX, or may be provided to a subscriber to a regional exchange using a regional exchange equipped with an intelligent network function. Because of the high cost and difficulty of maintenance, it was difficult for small businesses or individual users to use such services.

Therefore, there is an urgent need to provide such a service in a communication network so that it can be used on a general telephone without investment and maintenance for a private network or a local exchange.

Moreover, the mid-call service provided on the existing PBX is limited to the telephone function because it is designed for the telephone terminal, but in the next generation network, the customized application service logic (by the application server) for each subscriber and various announcements ( By the media server), there is an advantage that it can provide a higher value-added mid-call service, the mid-call service in the next generation network is more urgently required.

The present invention has been proposed to meet the above-mentioned demands, and receives a hook-flash event (service request) requested from a general telephone user in an Internet Protocol (IP) -based next-generation communication network, and provides a mid-call service during a telephone call ( In particular, by providing a call forwarding service, a three-person call service, etc., by providing a variety of services for the general telephone and IP terminals, the mid-call service device of the general telephone that can activate the use of the telephone and improve the network utilization rate; The purpose is to provide a method.

An apparatus of the present invention for achieving the above object is a mid-call service apparatus in a packet network (NGN), the application server for performing the call control service logic; A media server for transmitting a mid-call service announcement on a corresponding call path under the control of the application server; And controlling and interoperating with an access gateway (AG) to perform a call processing control function for a first terminal based on a general telephone network in the packet network, wherein the first terminal and the second terminal are in a busy state from the first terminal. When requesting a call forwarding service of, 'a third terminal to which the first terminal wants to transfer' is established a new call path between the second terminal, and to release the call connection between the first terminal and the second terminal Characterized in that it comprises a soft switch. The present invention is characterized in that it further comprises the access gateway (AG) connected to the packet network, for accommodating the first terminal based on a general telephone network in the packet network.

In addition, the apparatus of the present invention, a mid-call service apparatus in a packet network (NGN), comprising: an application server for performing the call path control service logic; A media server for transmitting a mid-call service announcement on a corresponding call path under the control of the application server; And controlling and interoperating with an access gateway (AG) to perform a call processing control function for the first terminal in the packet network, wherein the first terminal and the second terminal are in a busy state. When the service request is made, the call connection is set to 'at least one third terminal which the first terminal wants to participate in the call', thereby establishing a call path between the first terminal and the second terminal. Characterized in that it comprises a soft switch for extending to the terminal. In addition, the present invention is characterized in that it further comprises the access gateway (AG) for accessing the packet network, to accommodate the first terminal based on the general telephone network in the packet network.

On the other hand, the method of the present invention, a mid-call service method in a packet network (NGN), Network configuration step of accepting the first terminal based on the general telephone network in the packet network through an access gateway; A service request detection step of detecting a mid-call service request due to a hook flash event from the first terminal while the first terminal and the second terminal are in a call; A guide broadcast sending step of transmitting a guide broadcast for inducing a service selection input; And a new call path between the third terminal to which the first terminal is to be transferred and the second terminal when the call transfer service is requested from the first terminal according to the announcement. And a mid-call service step of releasing a call connection between the second terminal and the second terminal.

In addition, the method of the present invention is a midcall service method in a packet network (NGN), comprising: a network configuration step of accepting a first terminal based on a general telephone network in the packet network through an access gateway; A service request detection step of detecting a mid-call service request due to a hook flash event from the first terminal while the first terminal and the second terminal are in a call; A guide broadcast sending step of transmitting a guide broadcast for inducing a service selection input; And setting up a call connection as 'at least one third terminal to which the first terminal wants to participate in the call' when the multi-party call service request is made from the first terminal, and is established between the first terminal and the second terminal. And a mid-call service step of extending a call path to the at least one third terminal.

In addition, the method of the present invention, in the mid-call service method in the packet network (NGN), if a hook-flash event (service request) occurs from the telephone terminal during the telephone call, the service request step is raised to the soft switch via the access gateway ; A service processing request requesting a service processing request to the application server when the hook flash event received from the soft switch is detected by the call processing unit to find a matching point and transmitted to the application service processing unit. step; The application server performs the requested service to request the call processing to the softswitch, and request a call connection to the media server to collect information through appropriate guidance to the corresponding terminal and receive the collected information to the softswitch. A call processing request step of requesting a corresponding call processing; A call processing operation control unit of the soft switch, receiving a call processing request from the application server, finding a matching call processing point and transmitting the SIP message together with a SIP message to a protocol processing unit; And controlling the corresponding SIP terminal by performing the call processing according to the call processing point received by the SIP call processing unit or converting the protocol into a MEGACO message mapped by receiving the SIP message, and converting the call processing point and the MEGACO message into the MEGACO call. And a control step of transmitting to a processing unit to control the access gateway by performing a call processing by the MEGACO call processing unit.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to explaining the present invention, in the present embodiment, for convenience of explanation, the telephone terminal is used as the first and second means for transmitting and receiving, and for a call transfer when the telephone user causes a hook flash event during a call. Or limited to the third means for call connection to the third telephone terminal for the three-person call, it is noted that this number can be adaptively changed according to the number of telephone terminals.

1 is a configuration diagram of an embodiment of a mid-call service apparatus for a general telephone in a next-generation communication network according to the present invention.

As shown in FIG. 1, in a next-generation communication network, the mid-call service device 15 of a general telephone, under the control of an application server 151 and an application server 151 for performing call path control service logic, performs a corresponding call. Controlling and interoperating with the media server 152 and the access gateway (AG) 154 for transmitting the midcall service announcement on the network, the call processing control for the general telephone terminal 11 in the NGN packet network 14 To perform the function, when the call forwarding service request from the general telephone terminal 11 in the state that the general telephone terminal 11 and the SIP terminal 12 is in a call, 'the terminal to which the general telephone terminal 11 ( And a soft switch 143 for establishing a new call path between the SIP terminal 12 and the call connection between the general telephone terminal 11 and the SIP terminal 12.

In addition, the present invention further includes an access gateway (AG) 13 connected to the NGN packet network 14 to accommodate a general telephone network-based general telephone terminal (POTS) 11 in the NGN packet network 14. .

As described above, the mid-call service apparatus in the next-generation communication network according to the present invention is characterized in that each component operates based on SIP.

The operation of the midcall service device in the next-generation communication network of the present invention having the above structure will be described in detail.

As shown in FIG. 1, a general telephone terminal (POTS terminal) 11 is a wired / wireless telephone terminal based on a public switched telephone network, and a Session Initiation Protocol (SIP) terminal 12 is an IP terminal based on a SIP protocol. The POTS terminal 11 connects to the NGN packet network 14 through the access gateway 13, and the SIP terminal 12 can directly connect to the NGN packet network 14.

The Access Gateway (AG) 13 packetizes voice and directly connects to the NGN packet network 14 to be controlled by the soft switch 153 through the MEGACO protocol. Perform the function.

The soft switch (SSW: SoftSWitch) 153 provides a call processing control function to support voice in the NGN packet network 14, and controls and interacts with the access gateway 13.

The application server (AS) 151 provides various high value-added application service creation / execution environments in addition to the basic services provided by the soft switch 153, and is similar to SCP that provides intelligent network services of a public switched telephone network (PSTN). As a device, it can quickly respond to new service demands.

Media Server (MS) is an IP-based Voice-over-IP (VoIP) system that provides various types of resources for service using SIP standard protocols. As a component to provide voice synthesis, voice XML or FAX service, it performs call control function, codec and packet conversion function.

2 is a configuration diagram of an embodiment of a soft switch (SSW) 153 of a mid-call service apparatus in a next-generation communication network according to the present invention.

As illustrated in FIG. 2, the soft switch 153 includes a SIP call processing unit 21 for controlling a Session Initiation Protocol (SIP) terminal and a MEGACO (Media Gateway Control) for controlling the access gateway 13. A call processing unit 22, a detection point information management unit that manages detection point information of an application service controlled by the protocol conversion unit 23 and the access gateway 13, which converts a MEGACO message into a SIP message used inside the system; It includes an application service processing unit 24 composed of a call processing operation control unit for controlling the processing operation.

In addition, each of the internal modules of the soft switch 153 except for the MEGACO call processing unit 22 for controlling the access gateway 13 operates based on the SIP, and works in conjunction with the application server 151 or the SIP terminal 12. It easily operates to the service processing request of the application server 151, but interworking with the access gateway 13 is interlocked and controlled through the MEGACO call processing unit 22 and the protocol conversion unit 23.

In addition, the soft switch 153 uses an intelligent network part (INAP) call model for the MEGACO call processing to find a detection point when the MEGACO message is input, and activates the corresponding call processing point when the call processing point is received. MEGACO including a call processing unit 22 and a SIP call processing unit 21 for locating a detection point when receiving a SIP message using an INAP call model for SIP call processing and activating the corresponding call processing point when receiving a call processing point. Mapping messages and SIP messages to the INAP call model facilitates call processing, facilitating protocol conversion between MEGACO and SIP messages.

In the next-generation communication network of the present invention having the structure as described above, the operation of the soft switch (SSW) of the mid-call service device of the general telephone is described in detail as follows.

When the telephone user of the originating terminal POTS terminal 11 makes a call in the next generation communication network, the access gateway 13 converts the MEGACO protocol message and transmits the message to the soft switch 153.

The soft switch 153 finds a detection point using the MEGACO call model in the MEGACO call processing unit 22, converts the message into a SIP message through the protocol conversion unit 23, and passes the message to the application service processing unit 24.

The application service processing unit 24 triggers a service to the application server 151 when there is a service request to process the input detection point. The application server 151 performs triggered service logic to transmit the corresponding call processing message to the application service processing unit 24, and the application service processing unit 24 performs call processing control on the received call processing message to the SIP terminal. If the message is sent to the SIP call processing unit 21, if the message to the POTS terminal 11 is sent to the protocol conversion unit 23 is converted into a MEGACO message to be delivered to the MEGACO call processing unit 22. The SIP call processor 21 transmits the transmitted message to the corresponding terminal via the SIP stack, and the MEGACO call processor 22 transmits the transmitted message to the corresponding POTS terminal 11 via the MEGACO stack and the access gateway 13. do.

FIG. 3 is a diagram illustrating an embodiment of a mapping process between an INAP origination and call model and a MEGACO call flow performed by the MEGACO call processor in the soft switch of FIG. 2.

As shown in FIG. 3, the MEGACO call processing unit is composed of an outgoing INAP call model and an incoming INAP call model, and the call processing point related to the MEGACO call processing and the detection point related to the INAP call processing are matched with each other. The MEGACO message transmitted from the destination AG transmits the sensing point information mapped in FIG. 3 to the application service processor through the protocol converter and activates the call processing point according to the call flow from the application service processor through the protocol converter.

FIG. 4 is a diagram illustrating an embodiment of a mapping process between an INAP origination call model and a SIP call flow performed by a SIP call processor in the soft switch of FIG. 2.

As shown in FIG. 4, the SIP call processing unit is composed of an outgoing INAP call model and an incoming INAP call model, and the call processing point related to the SIP call processing and the detection point related to the INAP call processing are matched. Alternatively, the SIP message transmitted from the called SIP terminal transmits the detection point information mapped in FIG. 4 to the application service processor and activates the call processing point according to the SIP call flow in association with the application service processor.

FIG. 5 is a diagram for explaining an operation of an application service processor of the soft switch of FIG. 2. FIG.

As shown in FIG. 5, the application service processing unit includes a detection point information management unit and a call processing operation control unit as shown in FIG. 5.

Here, the detection point information management unit performs the function of managing the detection point information of the AS application service. The detection point information management unit is configured with information on the detection point number, the detection point type, and the triggered service processing request to set the detection point of the AS. When the detected point is transmitted from the SIP call processor or from the MEGACO call processor through the protocol conversion unit, the corresponding service processing request that is mapped is found to trigger the corresponding service of the AS. There are trigger detection and event detection in the detection point information management unit. Trigger detection is a signaling message related to initial call connection between inbound and outbound calls, and event detection means detection of an event generated by a terminal user after connection between inbound and outbound calls. do.

FIG. 6 is an exemplary diagram illustrating an internal protocol conversion table in the protocol conversion unit of FIG. 2. The protocol conversion unit performs one-to-one mapping between each message by performing conversion between MEGACO and SIP messages as shown in the protocol conversion table of FIG. 6.

Hereinafter, with reference to Figure 7 attached to the mid-call service process of the general telephone in the next-generation communication network according to the present invention with the above-described configuration will be described in detail.

7 is a flowchart illustrating an embodiment of a mid-call service method for a general telephone in a next-generation communication network according to the present invention.

As shown in FIG. 7, in order to perform a mid-call service of a general telephone in a next-generation communication network, a hook flash event occurs through a telephone terminal during a call (701). Select the service (for example, announcement 1 to select 1 for call forwarding and 2 for 3 call requests).

Subsequently, after confirming the received contents as described above (703), if a call forwarding request message is selected, the user is guided to input a phone number to forward the call, receives a call forwarding number, connects a new call path between the called party and the forwarding number, and Call connection ends (704-707).

On the other hand, when confirming the received content as described above (703) when the call request message of three people is selected (that is, when the user who caused the hook flash event requested a three person call), likewise to participate in the call The phone number of the new user is input and the current call is connected (708, 709) to check whether the connection is successful (710).

As a result, if the call connection result is successful, start the three-person call (708), if no answer terminates the call connection (709), or if the terminal is not accessible, the message is not attached to the network (712). In case of network congestion, the network floodwater guide broadcast is performed (713).

8 is a flowchart illustrating a message processing process of a call forwarding service in a mid-call service method of a general telephone in a next-generation communication network according to the present invention, which is described in detail with reference to FIG. 8 represented by a message sequence chart in each service providing apparatus. Explain.

As shown in FIG. 8, when the AG 81 notifies the SSW 82 of the caller's off-hook event (801), the SSW 82 sends a dial tone to the AG 81 (802) of the corresponding digit map. A request is made to receive the number and to monitor the on-hook event, and then request generation of the outgoing leg (803). At this time, the calling party A 81 determines whether the subscriber is a subscriber to the service provided by the AS 83, and if so, transmits the SIP message about the call connection request to the AS 83 and receives the message again, SSW. When the number of the corresponding digit map is input, the caller recognizes the called number and generates a called leg to open a call path between the caller and the called party (804 to 806).

At this time, when the caller causes the hook flash event, the AG 81 notifies the SSW 82 of the event in the Notify message of the MEGACO protocol (807), and the SSW 82 converts the message into the INFO method of the SIP protocol. Notify AS 83 (808). The AS 83 first requests the SSW 82 to hold the called party's call (809) and the SSW 82 sends the incoming leg information to the called party's AG 81 to HOLD to perform this. Request modification and on-hook monitoring (810).

Subsequently, the AS 83 requests a call connection with the sender by sending a SIP INVITE message to the MS 84 (811,812) and also sends a re-INVITE message through the SSW 82 to the sender (813). The SSW 82 requests the AG to modify the outgoing leg information by modifying the outgoing leg information by requesting a call connection with the caller, thereby connecting the call path between the caller and the MS (814).

When the AS 83 sends the corresponding announcement to the MS 84 in the INFO message (815), the MS 84 broadcasts the announcement to the caller, collects the digits, and transmits the digits to the AS 83 (816). The AS 83 then sends a BYE message to the MS 84 to terminate the call connection (817-819).

The AS 83 makes a call to the collected digit when the collected digit is the call forwarding number and sends a re-INVITE to the SSW 82 for connection with the called party when the call is connected, so that the SSW 82 sends the called party's AG (81). By modifying the connection address and port number information of the incoming leg and monitoring the on-hook event, a new call path is connected between the called party and the forwarding number (820 to 826). The AS 83 sends a BYE message to the SSW 82 to release the caller's call connection so that the SSW 82 deletes the originating leg (827 to 830).

In the present embodiment, the terminal making a midcall request is described as a case of a POTS phone, which is a telephone terminal. However, in the case of a SIP terminal, the midcall request can be performed in the same manner. . In this case, however, the INFO method 815, which is a mid-call request SIP message, is directly transmitted from the SIP terminal to the application server 83.

And, in the present embodiment, but illustrated as a call forwarding and a three-person call, it can be applied to a variety of additional services using the call, such as call waiting, internal call reservation, mid-call, it is obvious that it should also be seen as the same as the present invention.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.). Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention can provide various mid-call services provided by the next generation communication network to existing POTS telephone users and IP terminal users, thereby enabling activation of telephone use and improving network utilization. .

1 is a configuration diagram of an embodiment of a mid-call service apparatus for a general telephone in a next-generation communication network according to the present invention.

Figure 2 is a configuration diagram of an embodiment of a soft switch (SSW) of the mid-call service device of the general telephone in the next-generation communication network according to the present invention.

FIG. 3 is a diagram illustrating an embodiment of a mapping process between an INAP origination and call model and a MEGACO call flow performed by the MEGACO call processor in the soft switch of FIG. 2. FIG.

FIG. 4 is a diagram illustrating an embodiment of a mapping process between an INAP origination call model and a SIP call flow performed by a SIP call processor in the soft switch of FIG. 2; FIG.

FIG. 5 is a diagram for explaining an operation of an application service processor in the soft switch of FIG. 2; FIG.

6 is an exemplary diagram illustrating an internal protocol conversion table in the protocol conversion unit of FIG. 2.

7 is a flowchart illustrating an embodiment of a mid-call service method for a general telephone in a next-generation communication network according to the present invention.

8 is a flowchart illustrating a message processing procedure of a call forwarding service in a mid-call service method of a general telephone in a next-generation communication network according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: general telephone terminal (POTS terminal) 12: SIP terminal

13 access gateway (AG) 14 NGN packet network

15: mid-call service device 151: application server

152: media server 153: soft switch

Claims (14)

In the mid-call service apparatus in the packet network (NGN), An application server for performing control service logic in a call; A media server for transmitting a mid-call service announcement on a corresponding call path under the control of the application server; And Controlling and interoperating with the access gateway (AG) to perform a call processing control function for the first terminal based on the general telephone network in the packet network, wherein the first terminal and the second terminal are in a busy state from the first terminal. When requesting a call transfer service, a software for establishing a new call path between the 'third terminal to which the first terminal intends to transfer' and the second terminal and releasing a call connection between the first terminal and the second terminal. switch Mid-call service device of the general telephone in the next-generation communication network including a. The method of claim 1, An access gateway (AG) connected to the packet network for accommodating the first terminal based on a general telephone network in the packet network The mid-call service device of the general telephone in the next-generation communication network further comprising a. In the mid-call service apparatus in the packet network (NGN), An application server for performing control service logic in a call; A media server for transmitting a mid-call service announcement on a corresponding call path under the control of the application server; And Controlling and interoperating with an access gateway (AG) to perform a call processing control function for the first terminal in the packet network, and a multi-party call service from the first terminal while the first terminal and the second terminal are in a call Upon request, the call connection is set to 'at least one third terminal which the first terminal wants to participate in the call', thereby establishing a call path established between the first terminal and the second terminal. Softswitch to extend Mid-call service device of the general telephone in the next-generation communication network including a. The method of claim 3, wherein The access gateway (AG) connected to the packet network to accommodate a first terminal based on a general telephone network in the packet network The mid-call service device of the general telephone in the next-generation communication network further comprising. The method according to any one of claims 1 to 4, The first terminal is a wired / wireless telephone terminal (POTS terminal) based on a public switched telephone network, and the POTS terminal connects to the packet network (NGN) through the access gateway, or provides a midcall request capability (INFO method function). Equipped with an Internet SIP terminal, connected to the packet network, The second terminal and the at least one third terminal are either a wired / wireless telephone terminal (POTS terminal) or an internet terminal (SIP terminal) based on a public switched telephone network, and the SIP terminal is interworked with the packet network (NGN). , The mid-call service device of a general telephone in a next-generation communication network, wherein each component of the mid-call service device operates on a SIP basis. The method of claim 5, The soft switch, A SIP call processor for controlling the Session Initiation Protocol (SIP) terminal; A Media Gateway Control (MEGACO) call processor for controlling the access gateway; A protocol conversion unit converting the MEGACO message into a SIP message used in the system; And Application service processing unit comprising a detection point information management unit for managing the detection point information of the application service controlled by the access gateway and a call processing operation control unit for controlling the call processing operation Mid-call service device of the general telephone in the next-generation communication network including a. The method of claim 6, The soft switch, The MEGAGO call processing unit receives a MEGACO message using the INAP call model for the MEGACO call processing, and receives the call processing point and activates the corresponding call processing point, and uses the INAP call model for the SIP call processing. The SIP call processing unit receives a SIP message, finds a detection point, receives a call processing point, and activates the corresponding call processing point. The MEGACO message and the SIP message are mapped to an INAP call model, and the call processing is performed. A mid-call service device for a general telephone in a next generation communication network, characterized in that to perform protocol conversion between messages. In the mid-call service method in the packet network (NGN), A network configuration step of accommodating a first terminal based on a general telephone network in the packet network through an access gateway; A service request detection step of detecting a mid-call service request due to a hook flash event from the first terminal while the first terminal and the second terminal are in a call; A guide broadcast sending step of transmitting a guide broadcast for inducing a service selection input; And According to the announcement, when a call transfer service request is made from the first terminal, a new call path is established between the third terminal to which the first terminal is to be transferred and the second terminal. Mid-call service step of releasing the call connection between the second terminal Mid-call service method of the general telephone in the next-generation communication network including a. In the mid-call service method in the packet network (NGN), A network configuration step of accommodating a first terminal based on a general telephone network in the packet network through an access gateway; A service request detection step of detecting a mid-call service request due to a hook flash event from the first terminal while the first terminal and the second terminal are in a call; A guide broadcast sending step of transmitting a guide broadcast for inducing a service selection input; And When a multi-party call service request is made from the first terminal, a call connection is set to 'at least one third terminal to which the first terminal wants to participate in the call', thereby establishing a call between the first terminal and the second terminal. Mid-call service step of extending a furnace to the at least one third terminal Mid-call service method of the general telephone in the next-generation communication network including a. The method according to claim 8 and 9, The first terminal is a wired / wireless telephone terminal (POTS terminal) based on a public switched telephone network, the POTS terminal is connected to the packet network (NGN) through the access gateway, The second terminal and the at least one third terminal are either a wired / wireless telephone terminal (POTS terminal) or an internet terminal (SIP terminal) based on a public switched telephone network, and the SIP terminal is interworked with the packet network (NGN). , A mid-call service method for a landline telephone in a next-generation communication network, wherein each component of the mid-call service device operates on a SIP basis. In the mid-call service method in the packet network (NGN), A service request step of raising a case to a soft switch via an access gateway when a hook flash event (service request) occurs from a telephone terminal during a telephone call; A service processing request requesting a service processing request to the application server when the hook flash event received from the soft switch is detected by the call processing unit to find a matching point and transmitted to the application service processing unit. step; The application server performs the requested service to request the call processing to the softswitch, and request a call connection to the media server to collect information through appropriate guidance to the corresponding terminal and receive the collected information to the softswitch. A call processing request step of requesting a corresponding call processing; A call processing operation control unit of the soft switch, receiving a call processing request from the application server, finding a matching call processing point and transmitting the SIP message together with a SIP message to a protocol processing unit; And The SIP call processing unit performs call processing according to the input call processing point to control the corresponding SIP terminal, or protocol conversion unit converts the protocol into a MEGACO message mapped to the received SIP message, and converts the call processing point and the MEGACO message into the MEGACO call processing unit. Controlling the access gateway by performing a call processing by the MEGACO call processor Mid-call service method of the general telephone in the next-generation communication network including a. The method of claim 11, The soft switch, When a user makes a hook flash event during a call on a general telephone terminal, the soft switch receiving the event via an access gateway sends the event to the application server by placing the event in the INFO method of the SIP protocol. How to make a mid-call from a landline in. The method of claim 11, The soft switch, When a user requests a midcall service by pressing a hook-flash button during a call on a SIP terminal, an INFO method is generated from the terminal, and the soft switch transmits it to the application server. Service method. The method according to any one of claims 11 to 13, The soft switch, The MEGAGO call processing unit receives a MEGACO message using the INAP call model for the MEGACO call processing, and receives the call processing point and activates the corresponding call processing point, and uses the INAP call model for the SIP call processing. The SIP call processing unit receives a SIP message, finds a detection point, receives a call processing point, and activates the corresponding call processing point. The MEGACO message and the SIP message are mapped to an INAP call model, and the call processing is performed. A mid-call service method for a general telephone in a next-generation communication network, characterized in that to perform protocol conversion between messages.