KR101069018B1 - Apparatus and method for providing missed call information - Google Patents

Abstract

The present invention relates to an apparatus and a method for providing missed incoming information, which correspond to a telephone number input by a calling terminal among a plurality of telephone numbers assigned as a called terminal to information about a call connection attempted by a called terminal that is incapable of talking. The present invention relates to an apparatus and a method for providing missed incoming information to be transmitted to a called terminal which has been switched to a callable state by adding information.

According to an embodiment of the present invention, an apparatus for providing missed call information includes: a receiver configured to receive a first request message for requesting a transmission of a missed call information message to a called terminal; and a caller terminal with reference to the received first request message. And a determining unit determining whether the telephone number of the called terminal included in the outgoing call is a virtual number, and a transmitting unit transmitting a second request message in which information corresponding to the telephone number is inserted according to the determination result.

Real number, virtual number, call forwarding information

Description

Apparatus and method for providing missed call information

The present invention relates to an apparatus and a method for providing missed incoming information. More particularly, the present invention relates to an apparatus and method for providing missed incoming information. The present invention relates to an apparatus and method for providing missed incoming information for adding information corresponding to a telephone number and transmitting the information to a called terminal which has been switched to a callable state.

The virtual number service of the mobile communication service means a service of allocating a plurality of telephone numbers to one terminal. Accordingly, the terminal to which a plurality of telephone numbers are assigned (hereinafter, referred to as a virtual number terminal) may display a telephone number selected by itself among the plurality of allocated telephone numbers on the counterpart terminal.

For example, when a virtual number terminal attempts to make a call or sends a text message to a counterpart terminal subscribed to the caller ID service, the phone number displayed on the counterpart terminal is determined by the user among a plurality of phone numbers assigned to the virtual number terminal. It can be one phone number of your choice.

In addition, the user of the virtual number terminal can distinguish a plurality of phone numbers assigned to its terminal to inform other users, when the other user attempts to connect the call to the virtual number terminal to his terminal virtual number The user of the terminal can check the group to which the caller belongs by his / her number inputted by the caller.

On the other hand, when another terminal attempts to make a call to a called terminal that is incapable of calling, the call connection information stored when the called terminal is switched to a callable state while storing information on the call connection (hereinafter, referred to as missed information). Services are available.

According to such a missed call information service, the user of the called terminal can receive information on a call connection attempted in a state of incapacity through a text message.

A user using the virtual number service attempts to respond to each user by grouping the other users according to their preferences.

However, when a terminal subscribed to the virtual number service and the missed call information service is attempted to make a call connection from another terminal while the call is unavailable, the actual number of the terminal is specified in the information on the call connection transmitted according to the missed call information service. .

That is, the phone number of the terminal subscribed to the virtual number service is composed of a real number and a virtual number, and the actual number is uniformly specified in the information on the call connection transmitted according to the missed call information service. It is not possible to check whether the terminal attempts to connect by entering a real number or a virtual number by attempting to connect.

Therefore, in providing missed incoming information service, the appearance of the invention which additionally provides the information corresponding to the telephone number input by the opposite terminal is calculated | required.

The present invention is added to the information about the call connection attempted to the called terminal that is not available to the called terminal is added to the telephone number input by the calling terminal of the plurality of telephone numbers assigned to the called terminal is switched to the call available state Its purpose is to transmit to

The objects of the present invention are not limited to the above-mentioned objects, and other objects which are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, an apparatus for providing missed call information according to an embodiment of the present invention includes a receiving unit for receiving a first request message for requesting transmission of a missed call information message to a called terminal, and the received first request. A determination unit for determining whether the telephone number of the called terminal included in the outgoing call transmitted by the calling terminal is a virtual number, and a second request message including information corresponding to the telephone number according to the determination result. It includes a transmitting unit for transmitting.

According to an aspect of the present invention, there is provided a method for providing missed incoming information, comprising: receiving a first request message for requesting transmission of a missed incoming information message to a called terminal, and calling the terminal with reference to the received first request message. Determining whether the telephone number of the called terminal included in the outgoing call is a virtual number, and transmitting a second request message in which information corresponding to the telephone number is inserted according to the determination result.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the apparatus and method for providing missed incoming information of the present invention as described above, a phone number input by a calling terminal among a plurality of phone numbers assigned to the called terminal to information about a call connection attempted by a called terminal that is incapable of talking By adding the information corresponding to the transmission to the destination terminal is switched to the available state, there is an advantage that the destination terminal user can easily check the group to which the calling terminal user belongs.

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

1 is a diagram showing that missed call information is provided according to an exemplary embodiment of the present invention.

When the called terminal 120 is subscribed to the missed incoming information service, the called terminal 120 switched from the disabled state to the available state can receive the information that the call connection attempt was made during the disabled state.

That is, when the calling terminal 110 attempts to connect the call 115 to the called terminal 120, the incoming call information providing system 200 checks whether the called terminal 120 is currently available to call and if the called terminal If it is determined that 120 is incapable of calling, the terminal stores information such as a telephone number of the calling terminal 110 and a time when a call connection is attempted, and is called after the called terminal 120 is switched to available. The information stored in the terminal 120 is transmitted in a message.

On the other hand, when the called terminal 120 is subscribed to the virtual number service, the called terminal user can group the other terminal according to their preferences. For example, the called terminal user can inform the specific user group of the actual number of his terminal and inform the other user group of the virtual number of his terminal.

Accordingly, the counterpart terminal user may attempt to connect to the called terminal 120 using the actual number or the virtual number of the called terminal 120.

At this time, when the called terminal 120 is subscribed to the calling number display service, information on the calling terminal 110 is displayed on the display window of the called terminal 120, for example, a telephone number or user name of the calling terminal 110. Etc. may be displayed, and the group to which the calling terminal user belongs may be displayed.

That is, when the calling terminal user who attempts to connect the call inputs the real number or the virtual number of the called terminal 120, information indicating the real number or the virtual number may be displayed on the display window of the called terminal 120 in the form of text or video. For example, when the calling terminal user inputs the actual number of the called terminal 120, "real" is displayed on the display window of the called terminal 120, and the calling terminal user is the virtual terminal of the called terminal 120. If a number is entered, a "ga" character may be displayed on the display window of the called terminal 120.

As such, when the call connection request is received, the called terminal user may determine whether to respond to the call connection request by referring to the displayed group of the counterpart terminal user.

On the other hand, when the called terminal 120 is in an incapable state, for example, there may be a case where the power is not applied or located in an area where a signal cannot be received from a neighboring base station or a repeater. The providing system 200 may store the call connection attempt information of the calling terminal 110 and transmit the stored information in the form of a message to the called terminal 120 when the called terminal 120 is switched to the available state. have.

At this time, a message (hereinafter referred to as an incoming information message) 125 transmitted to the called terminal 120 includes a telephone number of the calling terminal 110 and a time when a call connection was attempted, and this is only the called terminal user. Cannot determine which group the calling terminal user belongs to.

Accordingly, the missed incoming information providing system 200 according to an embodiment of the present invention may display the group to which the calling terminal 110 belongs in the incoming information message 125 and transmit the same to the called terminal 120.

That is, the missed call information providing system 200 inputs a phone number of the called terminal 120 input by the calling terminal user, that is, whether the actual number or the virtual number of the called terminal 120 is entered as the called number. In addition to the incoming information message 125, the information is transmitted to the called terminal 120.

6 is a diagram illustrating a missed call information message including information on a phone number of a called terminal according to an embodiment of the present invention. A diagram showing what is included in 125. FIG.

Through the incoming information message 125, the called terminal user can check the group to which the calling terminal user belongs.

2 is a diagram illustrating a system for providing missed incoming information according to an embodiment of the present invention, wherein the missed incoming information providing system 200 includes a base station 211 and 212 and a radio network controller (RNC) 221. 222, Mobile Switching Center (MSC) 231, Intelligent Network Switch 232, Equipment Identity Register (EIR) 240, Service Control Point (SCP) 280 ), Home Location Register (HLR) 250, Authentication Center (AuC) 260, Short Message Service Center (SMSC) 270 and Incoming Information Providing Device 290 It is configured to include.

The terminals 110 and 120 may be mobile communication devices such as a mobile phone or a personal digital assistant (PDA), and the terminals 110 and 120 may hold a terminal identifier. The terminal identifier is a unique value for identifying the terminals 110 and 120 from other terminals, and may be assigned for each terminal by the terminal manufacturer or an authorized institution when the terminals 110 and 120 are produced.

Terminals 110 and 120 may be connected with an information card including a subscriber identifier. The subscriber identifier is unique information for identifying a subscriber, for example, an International Mobile Subscriber Identity (IMSI). In addition, the information card may generate an authentication value using a predetermined authentication function, which may be used when authenticating a subscriber in a mobile communication network.

The information card may be detachably connected to the terminals 110 and 120, or may be fixed to the terminals 110 and 120 to prevent the subscriber from detaching the information card from the terminals 110 and 120 arbitrarily. The information card may include a memory capable of storing data and a central processing unit (CPU) capable of performing a predetermined operation. Examples of such information cards include a subscriber identity module (SIM) card and a universal subscriber identity module (USIM) card.

In FIG. 2, one piece of equipment constituting the missed incoming information providing system 200 is illustrated one by one. However, this is only to schematically illustrate a basic configuration of the missed incoming information providing system 200, and the present invention is limited thereto. It doesn't happen. Therefore, the missed call reception information providing system 200 may include a plurality of respective devices, some of the equipment may be removed and operated. In addition, the missed incoming information providing system 200 may be operated by two or more pieces of equipment integrated into one, and a function performed by one piece of equipment may be divided into a plurality of pieces of equipment.

The base stations 211 and 212 are primary access points of the terminals 110 and 120, and may transmit and receive various signals and data with the terminals 110 and 120. That is, the base stations 211 and 212 may perform a wireless modem function consisting of an antenna and a transmission / reception modem. The communication channel from the terminals 110 and 120 toward the base station is called an uplink channel, and the communication channel from the base stations 211 and 212 toward the terminals 110 and 120 is called a downlink channel.

The radio network controllers 221 and 222 may control the base stations 211 and 212 and manage radio resources. More specifically, the radio network controllers 221 and 222 may instruct the base stations 211 and 212 to allocate the communication channel to the terminals 110 and 120 and control the transmission output of the base stations 211 and 212. . In addition, the radio network controllers 221 and 222 may support handover for the terminals 110 and 120 moving between the base stations 211 and 212.

The mobile telephone exchange 231 according to the embodiment of the present invention is connected to the wireless network controller 221 on the calling terminal 110 and receives the outgoing call of the calling terminal 110 and relays it to the called terminal 120. It performs the role of transmitting. In addition, the mobile telephone exchange 231 checks whether the called number sent by the calling terminal 110, that is, the telephone number of the called terminal 120 is a real number or a virtual number, and performs call processing according to the result. can do.

That is, when the called number is the actual number of the called terminal 120, the mobile telephone exchange 231 may allow call processing to be performed based on the called number (actual number), and the called number may be set to the called terminal 120. In the case of a virtual number, the mobile telephone exchange 231 transmits the called number (virtual number) to the intelligent network switch 232.

The intelligent network switch 232 according to an embodiment of the present invention extracts the real number by referring to the virtual number received from the mobile telephone exchange 231, and homes the position of the called terminal 120 using the extracted real number. May request a location register 250. In order to extract the actual number, the intelligent network switch 232 may receive the actual number by transmitting the virtual number of the called terminal 120 to the service control device 280.

The equipment identity register 240 may manage the terminal identifiers of the terminals 110 and 120 produced by the terminal manufacturer. An example of the terminal identifier is IMEI (International Mobile Equipment Identity). The terminal identifier of the newly produced terminal may be obtained directly from the terminal manufacturer, or may be obtained from a server (not shown) that handles registration for the new terminal of each manufacturer.

In addition, the device identity register 240 may also manage the state information of the terminals (110, 120). The state information of the terminals 110 and 120 may include information for identifying whether the terminals 110 and 120 are normal. According to an embodiment of the present invention, the state information of the terminals 110 and 120 may be set to one of 'normal', 'abnormal' (Black), and 'abnormal estimation (Gray)'. The state information of the terminals 110 and 120 usable normally may be set to 'normal'. However, the status information of the terminals 110 and 120 that may cause a malfunction in the terminal or the mobile communication network where theft report is received may be set to 'abnormal'. In addition, the terminal information that does not satisfy the communication conditions required by the mobile communication network or the status information of the terminal whether the status is 'normal' or 'abnormal' may be set to 'abnormal estimation'. Since the present invention is not limited by the embodiment of the method of collecting the state information of the terminals 110 and 120 by the device identity register 240, a detailed description thereof will be omitted.

In the mobile communication network, communication between the terminals 110 and 120 having the status information 'abnormal' may be blocked. Whether or not the communication is blocked for the terminals 110 and 120 whose status information is the 'abnormal estimation' may vary according to embodiments. have.

The device identity register 240 may map the state information of the terminals 110 and 120 to the terminal identifiers of the terminals 110 and 120 to hold the mapping information. For example, when the terminal identifier of the newly generated terminal is acquired, the device identity register 240 may map 'normal' as status information to the terminal identifier. If the loss report is received for the terminals 110 and 120, the device identity register 240 may change the state information mapped to the terminal identifiers of the terminals 110 and 120 from 'normal' to 'abnormal'. .

The service control device 280 may manage the intelligent network service to be provided to the terminals 110 and 120. For example, the service control device 280 may manage a message transmission service based on a short message service (SMS) or an unstructured supplementary services data (USSD) with respect to the terminal 100.

Preferably, the service control device 280 may drive the service logic suitable for the terminal (110, 120) according to the attribute information of the terminal (110, 120). The service control device 280 may manage attribute information of various terminals produced by the terminal manufacturer. Of course, there is a separate server (not shown) that manages the attribute information, and the service control apparatus 280 may access the corresponding server to check the attribute information of the terminals 110 and 120. The attribute information may refer to a function of the terminal 110 or 120 such as a language supported by the terminal 110 or 120, a screen resolution of the terminal 110 or 120, or a type of codec included in the terminal 110 or 120. May contain information indicating performance.

In addition, as described above, the service control device 280 may receive a virtual number from the intelligent network switch 232, retrieve a real number corresponding to the pseudo number, and respond to the intelligent network switch 232.

The home location register 250 may manage location information of the subscriber (eg, a VLR (Visitor Location Register) address, an MSC address, etc. where the terminals 110 and 120 are currently located) and subscriber additional service information.

The authentication device 260 may support authentication for the mobile subscriber and encryption function for the wireless call interval. Although the authentication device 260 is shown as an independent device from the home location register 250 in FIG. 2, the authentication device 260 may be included in the home location register 250.

The called party information providing apparatus 290 may be configured to include missed incoming information for the called terminal 120, that is, a telephone number of the calling terminal 110 that attempts to connect to the called terminal 120 while the called terminal 120 is incapable of talking. It stores the time of the call connection attempt, etc., and delivers to the called terminal 120 after the called terminal 120 is switched to the available state. To this end, the incoming information providing apparatus 290 may transmit the missed incoming information to the called terminal 120 in the form of a short message through the short message service center 270.

In addition, the reception information providing apparatus 290 according to an embodiment of the present invention performs the relay of missed incoming information by using the telephone number of the incoming terminal 120 received from the home location register 250, together with the telephone number. Call processing may be performed with reference to the received flag.

That is, the home location register 250 may receive a flag from the home location register 250 indicating whether the telephone number of the called terminal 120 included in the outgoing call transmitted by the calling terminal 110 is a virtual number. If the telephone number of the called terminal 120 included in the outgoing call is delivered with a flag (hereinafter, referred to as an actual number flag) specified as the actual number, the called party information providing device 290 receives the received telephone number (actual number). Call processing can be performed on the basis of), and when the telephone number of the called terminal 120 included in the outgoing call is delivered with a flag (hereinafter, referred to as a virtual number flag) specified as a virtual number, the called party information providing device 290 may allow call processing to be performed based on the virtual number corresponding to the received telephone number (actual number).

That is, when the received flag is an actual number flag, the called party information providing device 290 transmits the received telephone number (actual number) to the short message service center 270 to inform the called party information message 125 of the actual number. If the received flag is a virtual number flag, the incoming information providing device 290 forwards the virtual number to the short message service center 270 to add information about the virtual number to the incoming information message 125. You can do it.

3 is a block diagram illustrating an apparatus for providing missed incoming information according to an exemplary embodiment of the present invention. The apparatus for providing missed incoming information, that is, the incoming information providing apparatus 290 may include a receiver 310, a transmitter 320, The storage unit 330, the determination unit 340, the message generator 350, and the searcher 360 are configured to be included.

The receiving unit 310 serves to receive a request message (hereinafter, referred to as a first request message) for transmitting a missed incoming information message 125 to the called terminal 120.

The first request message may be delivered from the home location register. When the home location register determines whether the destination terminal 120 can make a call and transmits a first request message corresponding to the result, the reception unit 310 receives the first request message. will be.

The determination unit 340 determines whether the telephone number of the called terminal 120 included in the outgoing call transmitted by the calling terminal 110 is a virtual number with reference to the received first request message.

The first request message includes at least one of a flag, a virtual number, and an actual number indicating whether the telephone number of the called terminal 120 included in the outgoing call transmitted by the calling terminal 110 is a virtual number. When the message includes a flag, the determination unit 340 may determine the telephone number of the called terminal 120 with reference to the flag.

Thus, when only the real number is specified in the first request message and the virtual number is not specified, the search unit 360 searches for the virtual number in the storage unit 330 by referring to the real number. . Meanwhile, when the virtual number is specified in the first request message, the search unit 360 may not perform the virtual number search.

The storage unit 330 stores a real number and a corresponding virtual number. That is, the storage unit 330 stores the real number and the virtual number corresponding to each terminal, so that the search unit 360 can search for the virtual number.

The storage unit 330 may include a hard disk, a flash memory, a Compact Flash Card, a Secure Digital Card, an SD Card, a Smart Media Card, an MMC Card, a Memory Stick, or the like. As a module capable of inputting / outputting information, the module may be provided inside the repeater sensing device or may be provided in a separate device. When the storage unit 330 is provided in a separate device, the receiver 310 and the transmitter 320 may communicate with the separate device to transmit and receive information on the actual number and the corresponding virtual number.

The message generator 350 generates a request message (hereinafter referred to as a second request message) corresponding to the determination result of the determination unit 340. That is, when the received flag is the actual number flag, the message generator 350 generates a second request message including the actual number, and when the received flag is the virtual number flag, the message generator 350 generates the virtual number. To generate the second request message included.

Here, the virtual number may be included in the first request message or may be searched by the search unit 360. The second request message is transmitted to the short service center through the transmitter 320.

4 is a flowchart illustrating a process of searching for an actual number of a called terminal.

When the calling terminal 110 transmits an outgoing call in which a called number is specified (S410), the mobile telephone exchange 231 checks whether the called number is an actual number or a virtual number of the called terminal 120 (S420). The called number confirmation by the mobile telephone exchange 231 may be performed with reference to the number range assigned to the virtual number. For example, if a number in the range 010-6831-xxxx to 010-6837-xxxx is assigned to a virtual number, the mobile telephone exchange 231 sees whether the called number is in the range of numbers assigned to the virtual number. You can check the incoming number.

Thus, if it is confirmed that the called number is the virtual number of the called terminal 120, the mobile telephone exchange 231 transmits the virtual number to the intelligent network switch 232 (S430). On the other hand, when it is confirmed that the called number is the actual number of the called terminal 120, the mobile telephone exchange 231 may process the call based on the actual number.

The intelligent network switch 232 receiving the virtual number transmits the virtual number to the service control device 280 in order to request the actual number corresponding to the virtual number (S440).

Thus, the service control device 280 retrieves the actual number corresponding to the virtual number (S450) and transmits it to the intelligent network switch (232) (S460). To this end, the service control device 280 preferably stores the correspondence between the real number and the virtual number.

5 is a flowchart illustrating a process of providing missed call information according to an exemplary embodiment of the present invention, and illustrates a case in which a flag and an actual number are included in a first request message.

The intelligent network switch 232 receiving the actual number of the called terminal 120 from the service control device 280 requests the position of the called terminal 120 from the home location register 250 (S510). In requesting the location of the called terminal 120, the intelligent network switch 232 receives the call with a flag indicating whether the telephone number of the called terminal 120 included in the outgoing call transmitted by the calling terminal 110 is a virtual number. The actual number of the terminal 120 may be inserted into the location request message for the called terminal 120 and transmitted to the home location register 250.

Accordingly, the home location register 250 checks whether the called terminal 120 is currently in a callable state (S520), and when the called terminal 120 is determined to be incapable of call, the home location register 250 is absent from the called information providing device 290. In operation S530, the first request message for requesting transmission of the incoming information message 125 is transmitted.

Upon receiving the first request message, the called party information providing apparatus 290 determines whether the called number is a virtual number with reference to a flag (S540). Thus, when it is confirmed that the called number is a virtual number, the incoming information providing apparatus 290 searches for the virtual number in the storage unit 330 provided (S550). The virtual number search may be performed using the actual number included in the first request message.

The incoming information providing apparatus 290 transmits the second request message including the found virtual number and flag to the short message service center 270 (S560).

Accordingly, the short message service center 270 checks whether the called terminal 120 can be called (S570), and when the call is switched to the available state, transmits the missed incoming information message 125 to the called terminal 120 ( S580). In generating the missed incoming information message 125, the short message service center 270 may specify information indicating that the called number is a virtual number with reference to a flag.

On the other hand, when it is confirmed that the called number is the actual number, the called party information providing apparatus 290 skips the virtual number retrieval process (S550) and includes the actual number and flag in the second request message to the short message service center 270. As a result, the short message service center 270 may transmit to the destination terminal 120 a missed incoming information message 125 in which information indicating that the incoming information is an actual number is specified.

FIG. 5 illustrates a case in which a flag and a real number are included in the first request message. However, when a flag, real number and a virtual number are included in the first request message, a virtual number search process by the incoming information providing apparatus 290 is performed. S550 may be omitted.

That is, the receiving information providing apparatus 290 receiving the first request message determines the called number with reference to the flag (S540), and generates a second request message composed of the flag and the actual number according to the determination result, or generates a flag and a virtual message. A second request message composed of a number may be generated and transmitted to the short service center 270.

Here, the information on the flag, the actual number and the virtual number may be transmitted from the intelligent network switch 232 requesting the location of the called terminal 120 to the home location register 250.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 is a diagram showing that missed call information is provided according to an exemplary embodiment of the present invention.

2 is a diagram illustrating a system for providing missed call information according to an exemplary embodiment of the present invention.

3 is a block diagram illustrating an apparatus for providing missed call information according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating a process of searching for an actual number of a called terminal.

5 is a flowchart illustrating a process of providing missed call information according to an exemplary embodiment of the present invention.

6 is a diagram illustrating a missed incoming information message including information on a phone number of a called terminal according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

310: receiver 320: transmitter

330: storage unit 340: determination unit

350: message generator 360: search unit

Claims (12)

An apparatus for providing a missed call information message in a mobile communication system, A receiving unit for requesting transmission of a missed incoming information message to a called terminal and receiving a first request message including a flag indicating whether a telephone number of the called terminal included in an outgoing call is a virtual number; A determination unit for determining whether the telephone number of the called terminal included in the outgoing call transmitted by the calling terminal is a virtual number with reference to the received first request message; And If the determination result is a virtual number, a second request message in which the information including the virtual number and the flag is inserted is generated. If the virtual number is not specified in the first request message, the virtual number is searched and extracted through the actual number. And a transmitting unit configured to transmit the generated second request message to a short message service center to transmit the missed incoming information message to the called terminal. The method of claim 1, The first request message is an apparatus for providing missed incoming information received from a device that determines whether the called terminal is available. The method of claim 1, And wherein the first request message further comprises at least one of a virtual number of the called terminal or an actual number of the called terminal included in an outgoing call sent by the calling terminal. delete delete The method of claim 3, The device receiving the second request message provides the missed incoming information for transmitting the missed incoming information message including the information on the virtual number to the called terminal. A method for providing missed call information in an apparatus for providing missed call information messages of a mobile communication system, Requesting transmission of a missed incoming information message to a called terminal, and receiving a first request message including a flag indicating whether a telephone number of the called terminal included in an outgoing call is a virtual number; Determining whether the telephone number of the called terminal included in the outgoing call transmitted by the calling terminal is a virtual number with reference to the received first request message; And If the determination result is a virtual number, a second request message in which the information including the virtual number and the flag is inserted is generated. And transmitting the generated second request message to a short message service center (SMSC) to transmit the missed incoming information message to the called terminal. The method of claim 7, wherein The first request message is a method for providing missed incoming information received from a device that determines whether the called terminal is available. The method of claim 7, wherein And wherein the first request message further comprises at least one of a virtual number of the called terminal or an actual number of the called terminal included in an outgoing call sent by the calling terminal. delete delete The method of claim 9, And transmitting the missed incoming information message including the information on the virtual number to the called terminal as the second request message is received at the short message service center.

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