KR20070095548A - Method for call processing in mobile communication network - Google Patents

Abstract

A method for call processing in mobile communication network is provided to select call connection to a reception subscriber when the reception subscriber is received an emergency call on line, thereby enabling the reception subscriber to receive emergency call when emergency situation is occurred. A method for call processing in mobile communication network comprises the following steps of: receiving subscriber information of an opposite subscriber; requesting routing information related to emergency call to a switching system of a receiving side in which a position of the receiving subscriber is registered; determining whether a subscriber of a transmitting side is permitted by the subscriber of the receiving side; providing routing information to a transmission switching system through HLR(Home Location Register); requesting call connection for emergency call connection; notifying priory call connection according to reception of the emergency call connection; and connecting a communication path between transmission terminal and reception terminal.

Description

Call handling method in mobile network {METHOD FOR CALL PROCESSING IN MOBILE COMMUNICATION NETWORK}

1 is a diagram schematically illustrating a configuration of a mobile communication network in which a call processing method according to the present invention is implemented.

FIG. 2 is a flowchart illustrating a process of registering information of a counterpart subscriber who allows priority call connection according to an embodiment of the present invention. FIG.

3 is a flowchart illustrating a process of registering information of a counterpart subscriber that allows priority call connection according to another embodiment of the present invention.

4 is a flowchart illustrating a call processing method in a mobile communication network according to an embodiment of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10. mobile communication terminal, 20. base station,

30. base station controller, 40. switchboard,

50.HLR (Home Location Register), 60.Visitor Location Resister (VLR)

The present invention relates to a call processing method in a mobile communication network. In particular, when an emergency call is received by a called party in a busy state, an emergency call from a designated subscriber can be directly performed without performing a call waiting service. The present invention relates to a call processing method in a mobile communication network.

In a conventional mobile communication system, when a third party requests a call setup while a called party is in a voice call with another subscriber, a notification tone is output to notify the called party of an outgoing state from the third subscriber. And, through the outgoing subscriber's telephone number displayed on the beep and the screen display unit, the telephone call with the existing subscriber is temporarily waited according to the call button input of the incoming subscriber who recognizes the occurrence of the incoming call so that the incoming call can be received from the third subscriber. It provides call waiting service.

As described above, in the conventional call waiting service, the called subscriber who recognizes the calling state from the third subscriber through the beep confirms the third subscriber who wants to call based on the calling subscriber information displayed on the screen display, and then the called subscriber. When the call button is pressed, the call is connected to the third subscriber and the call is made. When the called party does not press the call button, only the waiting sound is transmitted to the third subscriber.

That is, conventionally, when an incoming call attempted from a third party occurs to a called party in a busy state, only the called party has a right to select a call for the incoming call.

Accordingly, conventionally, when the third subscriber attempts to call a called party in a busy state due to urgent business, when the called party not aware of the urgentness of the third party does not press the call button, the third subscriber is called. There is a problem that can not be called.

The present invention has been made to solve the above-described problems, when an emergency call is received by the called party in the busy state, if the calling party of the emergency call is a subscriber that is allowed to connect the priority call by the called party to perform the call waiting service It is an object of the present invention to provide a call processing method in a mobile communication network that enables a call connection with a called subscriber without performing the call connection.

According to an aspect of the present invention, there is provided a method for processing a call in a mobile communication network, the method comprising: registering and storing subscriber information of a counterpart subscriber that allows priority call connection for each subscriber in the HLR; Requesting location information of the called subscriber from the originating exchange to the HLR in response to an emergency call request from the calling subscriber, and requesting routing information of the emergency call from the HLR to the destination exchange in which the called subscriber is located; and; If the called subscriber is busy on the called exchange, the called subscriber is subscribed to the preferred call connection service according to the service profile of the called subscriber stored and received from the HLR, and the calling subscriber is given priority by the called subscriber. Determining whether the subscriber is allowed to call; Providing the routing information to the originating exchange through the HLR if the called subscriber is subscribed to the preferred call connection service and the calling subscriber is allowed to make the preferred call connection by the called subscriber; Requesting a call connection for the emergency call to the destination exchange based on the routing information at the originating exchange; Notifying the priority call connection according to the emergency call reception from the destination exchange that is requested to call the emergency call to the called terminal; It is preferable to include a step of connecting the call path between the calling terminal and the called terminal.

In addition, the subscriber information registration process of the other subscriber who allows the preferred call connection is performed by the subscriber information of the registered target subscriber who allows the preferred call connection in the mobile terminal according to the key operation of the registration request subscriber who wants to register the priority call connection permission subscriber. Transmitting a registration request message including a message to the exchange; Requesting, by the exchange receiving the registration request message, priority call connection permission subscriber registration to the HLR based on the registration request message; Registering subscriber information of the subscriber to be registered in the priority call connection permission subscriber list of the registration requesting subscriber according to the priority call connection permission subscriber registration request at the HLR; It is preferable that the HLR comprises the step of reporting the registration result to the mobile communication terminal through the switch.

And, the subscriber information registration process of the other subscriber to allow the preferred call connection, the priority call including the subscriber information of the request target subscriber in the mobile communication terminal in accordance with the key operation of the permission requesting subscriber to receive the preferred call connection from the other party Sending a connection permission request message to the exchange; The exchange transmits an acceptance message asking whether to accept the priority call connection permission request to the mobile communication terminal of the requesting subscriber in cooperation with a text message center, and accepts an input result from the requesting subscriber that confirms the acceptance message. Receiving; Requesting registration of a preferred call connection grant subscriber from the exchange to the HLR when the request target subscriber grants the preferred call connection of the grant request subscriber as a result of the acceptance; Registering, at the HLR, subscriber information of the requesting subscriber in the priority call connection granting subscriber list of the requesting subscriber according to the priority call connection granting subscriber registration request; And reporting the registration result from the HLR to the mobile communication terminal of the permission requesting subscriber through the exchange.

In addition, when the calling subscriber requests an emergency call to the calling exchange, the calling subscriber additionally receives a code string defined as a code string representing an emergency call in the telephone number of the called subscriber to indicate that the call requesting the call is an emergency call. It is desirable to request an emergency call.

The determination of whether the calling party is a subscriber who is allowed to make a preferred call connection by the called party is made based on whether the subscriber information of the calling party is registered in the preferred call connection permission subscriber list of the called party. desirable.

In addition, the priority call connection notification process according to the emergency call reception, preferably comprising the step of transmitting a predetermined tone to the destination terminal as a signal tone for notifying the priority call connection according to the emergency call incoming from the destination exchange. .

In addition, the priority call connection notification process according to the emergency call incoming, the step of adding a code string indicating that the incoming call is an emergency call to the outgoing telephone number transmitted to the called terminal to provide a caller ID display service; And displaying a string indicating that the incoming call is an emergency call together with the outgoing phone number based on the code string received together with the outgoing phone number at the called terminal.

In addition, the preferred call connection notification process according to the emergency call incoming, preferably comprising the step of transmitting the voice of the calling subscriber to the destination terminal from the destination exchange for a predetermined time.

Hereinafter, a call processing method in a mobile communication network according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a road, a mobile communication terminal 10, a base station 20, a base station controller 30, a switch 40, and a HLR (Home Location) schematically showing a configuration of a mobile communication network in which a call processing method according to the present invention is implemented. A register 50 and a VLR (Visitor Location Resister) 60 are provided.

In such a configuration, the mobile communication terminal 10 is capable of voice calls and data communication with the other party through the mobile communication network.

The base station 20 is a network termination device wirelessly connected to the mobile communication terminal 10. The base station 20 receives a call request signal from the mobile communication terminal 10 through a traffic channel among signal channels, and receives the received call request signal from the base station controller. Transfer to 30.

The base station controller 30 controls the base station 20, and assigns and releases radio channels to the mobile communication terminal 10, transmit power control of the mobile communication terminal 10 and the base station 20, intercell handoff determination, base station It performs the operation and maintenance function for the 20, and transfers the call request signal received through the base station 20 to the switch 40.

The exchange 40 performs the incoming and outgoing call processing of the subscriber, the location registration procedure and the handoff procedure, the interworking function with the other network, and the called subscriber in the busy state when processing the call request signal of the mobile communication terminal 10. When an emergency call is received, the calling party of the emergency call is registered as a subscriber who is allowed to make a priority call by the called party, and the call is immediately connected with the called party without performing the call waiting service. If the subscriber is not registered as a subscriber who is allowed to make a preferred call connection by the called party, the busy waiting service is performed.

The HLR 50 receives the location information of the mobile communication terminal 10 from the VLR 60 and performs functions such as registration recognition, registration deletion, and location checking, and the profile information of the mobile communication terminal 10 (for example, , MIN, ESN, subscribed mobile communication service information, etc.).

The VLR 60 receives and stores the subscriber data from the switch 40 when the location information of the visited subscriber where the location registration is performed, when the call is attempted by the mobile communication terminal and when an incoming call flows into the mobile communication terminal.

Hereinafter, a call processing method in a mobile communication network according to an embodiment of the present invention will be described.

First, in order to implement a call processing method in a mobile communication network according to an embodiment of the present invention, the subscriber subscriber information that permits priority call connection should be registered for each subscriber.

As described above, the method of registering the other party subscriber information that allows the call connection is a method of registering at the called party receiving the call, and the receiving subscriber performs registration at the request of the calling party calling the call. There may be various methods such as a method.

According to an embodiment of the present invention, a process of registering information of a counterpart subscriber that allows a call connection will be described with reference to FIG. 2 as follows.

First, the mobile communication terminal 10 first connects to the switch 40 through the base station 20 and the base station controller 30 according to the key operation of the terminal user who wants to register the information of the other party subscriber who allows the first call connection. The permission telephone number registration request message (hereinafter referred to as a registration request message) is transmitted (S10).

The registration request message transmitted to the exchange 40 through the above process S10 includes message type information indicating that the message is a message for requesting registration of a priority call connection permission telephone number and a subscriber (hereinafter, referred to as 'registration'). It is preferable that the telephone number information of the target subscriber ') and the telephone number information of the subscriber (hereinafter referred to as a registration request subscriber) requesting registration of the preferred call connection permission telephone number are included.

The phone number information of the subscriber to be registered described above may include only one phone number or may include a plurality of phone numbers. That is, the terminal user may register one telephone number at a time, or may register several telephone numbers at a time.

The exchange 40 that has received the registration request message through the process S10 described above calls the HLR 50 based on the phone number information of the registered target subscriber and the phone number information of the registered request subscriber included in the registration request message. The request for registration of the connection permission telephone number is requested (S12), and the HLR 50 is included in the phone number information of the subscriber to be registered in the priority call connection permission telephone number list of the registration requesting subscriber according to the priority call connection permission telephone number registration request. Add the phone number to complete the registration of the preferred call connection permission phone number (S14).

For example, when subscriber A registers subscriber C as a subscriber who allows priority call connection, mobile terminal A transmits to subscriber 40's telephone number and subscriber A's telephone number according to subscriber A's key operation. The registration request message including the telephone number is transmitted, and the exchange 40, which has received the registration request message, requests registration of the priority call connection permission phone number to the HLR 50, and the HLR 50 requests the priority call connection permission phone number. In accordance with the registration request, subscriber A's priority call connection permission telephone number list is added to subscriber C's telephone number to complete registration of the priority call connection permission telephone number.

Thereafter, the HLR 50 reports the registration result of the preferred call connection permission telephone number registration request of step S12 to the switch 40 (S16), and the switch 40 receives the registration result reported from the HLR 50. Based on the above, the registration result message is transmitted to the mobile communication terminal 10 which has transmitted the registration request message (S18).

The mobile communication terminal 10 receiving the registration result message from the switch 40 through the process S18 displays the registration result message on the screen display to inform the terminal user of the registration result and confirms the registration result message. Follow the key operation to complete the call registration registration procedure.

On the other hand, according to another embodiment of the present invention will be described with reference to Figure 3 the process of registering the information of the subscriber to allow the first call connection as follows.

First, the mobile communication terminal 10a transmits a priority call connection permission request message to the exchange 40 through the base station 20 and the base station controller 30 according to a key operation of a terminal user who wants to receive priority call connection from the other party. (S20).

The priority call connection permission request message transmitted to the exchange 40 through the above process S20 includes message type information indicating that the message is a message requesting permission for priority call connection, and a subscriber who receives the priority call connection permission (hereinafter, Preferably, the phone number information of the 'subscribed target subscriber' and the telephone number information of the subscriber (hereinafter, referred to as the 'license request subscriber') requesting permission for priority call connection are included.

The exchange 40 which has received the priority call connection permission request message through the above-mentioned process S20 interworks with an SMS message center (SMC) (not shown) to request the priority call connection permission request to the mobile communication terminal 10b of the subscriber of the request target. The call back (Call Back) form of the acceptance message for request (for example, there is a request to grant a priority call from Hong Gil-dong. Do you accept? (Yes, No)) and transmits (S22).

The mobile communication terminal 10b of the request target subscriber, which has received the acceptance message through the process S22, notifies the terminal user of the message using an alarm, vibration, buzzer, etc. according to the message reception, and recognizes the message reception. The acceptance message received according to the key operation is displayed on the screen display (S24).

Subsequently, when the terminal user confirms the acceptance message received from the terminal user (S26), the mobile terminal 10b of the request target subscriber transmits the acceptance result to the switch 40 (S28), the request target subscriber The exchange 40 having received the acceptance result from the mobile communication terminal preferentially transmits to the mobile communication terminal 10a of the permission requesting subscriber when the requesting subscriber does not accept the preferred call connection of the requesting subscriber according to the acceptance result. Send a message indicating that the call connection permission was not accepted (S30, S32), and if the requesting target subscriber grants the preferred call connection of the requesting subscriber, the HLR 50 requests registration of the preferred call connection permission telephone number. (S34).

The HLR 50 that receives the priority call connection permission charge number registration request through the process S34 adds the telephone number of the permission request subscriber to the priority call connection permission phone number list of the requesting subscriber (S36).

For example, when subscriber A requests priority call connection to subscriber C, mobile communication terminal A transmits subscriber C's telephone number and subscriber A's telephone number to switch 40 according to subscriber A's key operation. Transmitting the priority call connection permission request message including a message, the exchange 40 receives the priority call connection permission request message in conjunction with the SMC (not shown) accepts the acceptance of the priority call connection permission request to the mobile communication terminal of the subscriber C If the subscriber C transmits a message for accepting the request and the subscriber C accepts the preferred call connection of the subscriber A, the HLR 50 requests the registration of the preferred call connection permission telephone number. Accordingly, HLR 50 adds subscriber A's telephone number to subscriber C's preferred call connection permission telephone number list according to the priority call connection permission telephone number registration request.

Subsequently, the HLR 50 reports the registration result of the preferred call connection permission telephone number registration request of step S34 to the switch 40 (S38), and the switch 40 receives the registration result reported from the HLR 50. Based on the above, the registration result message is transmitted to the mobile communication terminal 10a which has transmitted the call connection permission request message first (S40).

The mobile communication terminal 10a receiving the registration result message from the switch 40 through the process S40 displays the registration result message on the screen display to inform the terminal user of the registration result, and confirms the registration result message. The procedure for requesting permission to call first is terminated by the key operation of.

After the information of the other subscriber that allows priority call connection is registered for each subscriber through the process as described above, call processing is performed using the registered information. Hereinafter, the present invention will be described with reference to FIG. 4. A call processing method in a mobile communication network according to an embodiment of the present invention will be described.

First, when the mobile communication terminal A and the mobile communication terminal B are busy (S50), when the mobile communication terminal C attempts to make an emergency call to the mobile communication terminal A (S52), the mobile communication terminal A moves. In response to the emergency call origination attempt of the communication terminal C, the originating exchange 40a receiving the call request signal for the emergency call through the base station 10 and the base station controller 20 adds the originating terminal to the originating HLR 50a. Requesting information (S54), in response to the request of the originating exchange 40a, the originating HLR 50a searches for the service profile of the originating terminal based on the MIN information of the originating terminal and transmits it to the originating exchange 40a (S56). .

When the user of the mobile communication terminal (C), which is the calling terminal, attempts to make a call by dialing the telephone number of the called terminal in step S52, the call is an emergency call before or after the telephone number of the called terminal to indicate that the call is an emergency call. It is preferable to dial by adding a code string (for example, * 119) predefined by the code string shown.

The originating exchange 40a which has received the additional information of the originating terminal through the process S56 requests the location information of the mobile communication terminal A, which is the called terminal, to the called HLR 50b in which the called terminal is registered (S58). .

When the calling exchange 40a requests the location information of the called terminal to the called HLR 50b in step S58, it transmits information indicating that the call requested is an emergency call.

The incoming HLR 50b, which has received the position information of the mobile communication terminal A from the originating exchange 40a through the process S58, sends an emergency call to the destination exchange 40b where the mobile communication terminal A is registered. Request routing information for (S60).

In the process S60, when the destination HLR 50b requests routing information to the destination exchange 40b, the destination HLR 50b transmits the service profile of the calling terminal and the called terminal and information indicating that the call requested is an emergency call.

Accordingly, the destination exchange 40b that has received routing information for the emergency call from the destination HLR 50b through the process S60 performs a VLR 60b service profile of the source terminal and the destination terminal received from the destination HLR 50b. ) And check the state of the mobile communication terminal A, which is the called terminal. If the mobile communication terminal A is in a busy state (S62), refer to the service profile of the called terminal received from the called HLR 50b. Determining whether the call waiting service of the mobile communication terminal (A) is activated and the priority call connection service is activated, and the call waiting service of the mobile communication terminal (A) is activated and the priority call connection service is activated. If it is activated (S64), it is determined whether the mobile communication terminal C, which is the calling terminal, is a terminal that is first allowed to call by the mobile communication terminal A, which is the called terminal (S66). ).

In step S66, it is determined whether the mobile communication terminal C, which is the originating terminal, is a terminal permitted to be connected to the priority call by the mobile communication terminal A, which is the called terminal. The telephone number of the calling terminal is a priority call of the called terminal. It can be determined whether or not it is registered in the connection permission telephone number list.

As a result of the determination in step S66, when the mobile communication terminal C, which is the originating terminal, is not a terminal to which priority call connection is allowed by the mobile communication terminal A, which is the called terminal, the destination exchange 40b is a call according to the prior art. Provides a standby service (S68).

On the other hand, when the determination result of step S60 is that the mobile communication terminal (C), which is the originating terminal, is a terminal to which priority call connection is allowed by the mobile communication terminal (A), which is the called terminal, the destination exchange 40b is determined by the destination exchange side. In association with the VLR 60b, routing information including a temporary local directory number (TLDN) for the mobile communication terminal A, which is the destination terminal, is provided to the destination HLR 50b (S70).

The destination HLR 50b receiving the routing information from the destination exchange 40b through the process S70 transmits the received routing information to the source exchange 40a (S72), and the source exchange 40a transmits the received routing information. On the basis of the request to the call exchange for the emergency call to the destination exchange (40b) (S74).

After receiving the request for call connection for the emergency call from the originating exchange 40a through the process S74, the destination exchange 40b notifies the destination terminal of the preferred call connection according to the emergency call reception (S76), within a preset time. The three-way call is made by connecting the communication path between the mobile communication terminal A and the mobile communication terminal A and the mobile communication terminal C in communication (S78).

In the above-described process S76, the terminating exchange 40b notifies the mobile communication terminal A, which is the terminating terminal, of the priority call connection according to the emergency call reception. A method of transmitting a set ring tone, a method of transmitting by adding a code string (for example, * 119) indicating that an incoming call is an emergency call to an outgoing call number transmitted to a called terminal to provide a caller ID display service; There may be various methods such as a method of transmitting the voice of the calling subscriber to the called terminal from the switch 40b for a predetermined time.

As described above, in the method in which the destination exchange 40b notifies the destination terminal of the priority call connection according to the emergency call reception, the incoming call is an emergency call to the outgoing telephone number transmitted to the destination terminal to provide the calling party number display service. In the case of adding and transmitting a code string (for example, * 119), the called terminal receiving the received message recognizes that the incoming call is an emergency call based on the received code string along with the calling telephone number, and transmits the calling telephone number to the screen display unit. When displaying, it is preferable to display a string (for example, emergency call) indicating that the incoming call is an emergency call.

As described above, when a three-way call is made by connecting a call path between the calling terminal and the called terminal that have made the emergency call, the subsequent operation is performed according to the existing multi-party calling standard.

In the case where the mobile communication terminals A, B, and C are in communication with each other and another subscriber (for example, subscriber D), which is allowed to call first by the subscriber A, attempts to call the subscriber A, the subscriber C Call processing is performed according to the same flow as the call processing of.

The call processing method in the mobile communication network of the present invention is not limited to the above-described embodiments, and can be modified in various ways within the scope of the technical idea of the present invention.

According to the call processing method in the mobile communication network of the present invention as described above, when an emergency call is received by a called party in a busy state, if the calling party of the emergency call is a subscriber who is first allowed to connect to the call by the called party, the incoming call is immediately received. By establishing a call connection with a subscriber, it is possible to conduct a call with a called party in a busy state due to urgent business.

Claims (10)

Registering and storing subscriber information of a counterpart subscriber that allows priority call connection in each HLR; Requesting the location information of the called subscriber from the originating exchange to the HLR in response to an emergency call request from an originating subscriber, and requesting routing information for the emergency call from the HLR to the destination exchange in which the called subscriber is located; ; If the called subscriber is busy on the called exchange, the called subscriber is subscribed to the preferred call connection service according to the service profile of the called subscriber stored and received from the HLR, and the calling subscriber is given priority by the called subscriber. Determining whether the subscriber is allowed to call; Providing the routing information to the originating exchange through the HLR if the called subscriber is subscribed to the preferred call connection service and the calling subscriber is allowed to make the preferred call connection by the called subscriber; Requesting a call connection for the emergency call to the destination exchange based on the routing information at the originating exchange; Notifying the priority call connection according to the emergency call reception from the destination exchange that is requested to call the emergency call to the called terminal; And a step of connecting a call path between the calling terminal and the called terminal. According to claim 1, The subscriber information registration process of the other subscriber to allow the priority call connection, Transmitting, to the exchange, a registration request message including subscriber information of a subscriber to be registered to allow priority call connection in accordance with a key operation of a registration request subscriber that wants to register a priority call connection permission subscriber; Requesting, by the exchange receiving the registration request message, priority call connection permission subscriber registration to the HLR based on the registration request message; Registering subscriber information of the subscriber to be registered in the priority call connection permission subscriber list of the registration requesting subscriber according to the priority call connection permission subscriber registration request at the HLR; And reporting a registration result from the HLR to the mobile communication terminal through the switch. The method of claim 2, wherein the registration request message, Message type information indicating that the message is a request for registration of a preferred call connection permission subscriber; Subscriber information of a subscriber to be registered to allow priority call connection; A call processing method in a mobile communication network, comprising subscriber information of a registration request subscriber requesting registration of a preferred call connection permission subscriber. According to claim 1, The subscriber information registration process of the other subscriber to allow the priority call connection, Transmitting, by the mobile communication terminal, a priority call connection permission request message including subscriber information of the subscriber to be requested in response to a key operation of a permission requesting subscriber to receive priority call connection from the other party; The exchange transmits an acceptance message asking whether to accept the priority call connection permission request to the mobile communication terminal of the requesting subscriber in cooperation with a text message center, and accepts an input result from the requesting subscriber that confirms the acceptance message. Receiving; Requesting registration of a preferred call connection grant subscriber from the exchange to the HLR when the request target subscriber grants the preferred call connection of the grant request subscriber as a result of the acceptance; Registering, at the HLR, subscriber information of the requesting subscriber in the priority call connection granting subscriber list of the requesting subscriber according to the priority call connection granting subscriber registration request; And reporting the registration result from the HLR to the mobile communication terminal of the permission requesting subscriber through the switch. The method of claim 4, wherein the priority call connection permission request message is Message type information indicating that the message is a request for granting priority call connection; Subscriber information of the requesting subscriber who is requested to grant priority call connection; A method for processing a call in a mobile communication network, comprising subscriber information of a permission requesting subscriber requesting a priority call connection permission. The code string defined in claim 1, wherein when the calling subscriber requests an emergency call to the calling exchange, a code string defined as a code string representing an emergency call is indicated in a telephone number of the called party to indicate that the call requesting the call is an emergency call. The call processing method in a mobile communication network, characterized in that for receiving an additional emergency call. The method of claim 1, wherein the determination of whether the calling party is a subscriber who is allowed to make a preferred call connection by the called party is performed. And the subscriber information of the calling subscriber is registered in the preferred call connection permission subscriber list of the called subscriber. According to claim 1, The priority call connection notification process according to the emergency call incoming, And transmitting a preset tone from the called exchange to the called terminal as a tone for informing priority call connection according to an emergency call. According to claim 1, The priority call connection notification process according to the emergency call incoming, Adding a code string indicating that an incoming call is an emergency call to an outgoing telephone number transmitted to the called terminal to provide a calling party number indicating service; And displaying a string indicating that the incoming call is an urgent call together with the outgoing phone number based on a code string received together with the outgoing phone number at the called terminal. According to claim 1, The priority call connection notification process according to the emergency call incoming, And transmitting the voice of the calling subscriber to the called terminal by the called terminal for a preset time.

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