KR101501550B1 - International loaming method - Google Patents

Abstract

The present invention relates to an international roaming method for providing an international roaming service, and more particularly, to an international roaming method for simplifying an application procedure of a roaming service and forwarding a call request to a domestic telephone number to an overseas telephone number of a roaming applicant In addition, it is possible to make a call with low communication cost, shorten the time required for the call connection, and make a call request in the domestic when the roaming applicant wants to make a telephone call to the domestic, To an international roaming method capable of enjoying the Internet.

Description

International roaming method {INTERNATIONAL LOAMING METHOD}

The present invention relates to an international roaming method for providing an international roaming service, and more particularly, to an international roaming method for simplifying an application procedure of a roaming service and forwarding a call request to a domestic telephone number to an overseas telephone number of a roaming applicant In addition, it is possible to make a call with low communication cost, shorten the time required for the call connection, and make a call request in the domestic when the roaming applicant wants to make a telephone call to the domestic, To an international roaming method capable of enjoying the Internet.

The international roaming service is a service that allows users of domestic mobile communication terminals to continuously receive calls received from a domestic telephone number while they are staying abroad. In general, the domestic roaming service includes a domestic telephone number allocated during domestic use, It adopts the method of transferring the call request to the domestic telephone number to the overseas telephone number by converting the overseas telephone number into a database.

However, when a user of a domestic mobile communication terminal makes an international call to a user who applied for an international roaming service, a domestic fee is charged, and an international roaming service fee is charged to an international roaming service user. In addition, international roaming service users are charged a higher international roaming rate when dialing from abroad.

Meanwhile, there is a method of forming an international call path by relaying a VOIP server using an Internet network in order to make cheap international calls. However, due to the nature of the Internet network for transmitting packet data, it is difficult to transmit the call contents without interruption, There may be problems.

Recently, a service known as a free international call is emerging. A free international call is an international call through a relay number. The call is made to a relay number, which is a domestic telephone number, and a telephone number of a called party is also transmitted from the domestic country, thereby attempting to establish a call connection with the called party. Then, an international call is made through a call process in which a call connection through the relay number is requested to call an international call using a telephone call of the called party. Accordingly, a domestic caller has to pay a charge for calling a relay number, that is, a domestic telephone charge, and in the case of a smart terminal commonly used at present, Since you can make calls, even if you use a free international call, you can place an international call with no additional charge.

Accordingly, international roaming requires an international roaming method that allows international calls to be made using a free international call at low cost, and in addition, a procedure for applying for an international roaming service is required in order to receive an international roaming service. It is necessary to simplify.

In addition, since the time required for the call connection is increased due to the domestic call connection time and the overseas call connection time, the international roaming method should shorten the time required for the convenience of the user, and the roaming applicant So that it is possible to make calls quickly at low cost.

KR 10-0884113 B1 2009.02.10. KR 10-0782052 B1 Nov. 28, 2007.

Accordingly, it is an object of the present invention to reduce the communication cost by calling the international roaming service not only for domestic users but also for roaming service applicants via free international calls, shorten the time required for the call connection, and simplify the roaming service application procedure To provide a convenient international roaming method.

In order to achieve the above object, according to the present invention, there is provided a method for routing a domestic international switch linking a domestic line, which is connected to a domestic telephone number of a domestic smart terminal, to an international line by requesting a call through a relay number, When a call request is made from a smart terminal of a subscriber having an application for requesting a call through a relay number when a call is made to a called party telephone number, the call is negotiated with the communication carrier in advance and the call is forwarded to the domestic international switch And a routing control register which is connected to the smart terminal and also to an internet network by setting the routing so as to connect the telephone number of the caller to the telephone number of the called party, As a result,

Receiving a roaming application for receiving an international telephone number from an overseas smart terminal of an international roaming applicant through an Internet network and converting the received international telephone number into a database corresponding to a domestic telephone number of an international roaming applicant; A call request reception step of receiving a telephone number of a domestic smart terminal and a domestic telephone number of an international roaming applicant from a domestic smart terminal requesting a call with an international roaming applicant among domestic smart terminals of other subscribers through an Internet network; A domestic telephone number of the domestic smart terminal requested to make a call, command information for an international call connection attempt to the international telephone number, and a domestic connection line to the domestic smart terminal A routing setting step of establishing routing information including link information for identifying a telephone number of a foreign telephone and connecting to an overseas connection line that has attempted to make an international call to the foreign telephone number; Transmits the confirmed routing information to the domestic international switch and notifies the domestic smart terminal of the call request permission information through the Internet network so that the domestic smart terminal makes a call request through the relay number, A call connection request step of making an international call connection according to the information and making a call connection by link information; And a control unit.

The call request accepting step allows the international roaming applicant to receive a call request from the foreign smart terminal of the subscriber to the domestic smart terminal through the Internet and receives the domestic telephone number of the international roaming applicant from the domestic smart terminal The routing setting step and the call connection request step are sequentially performed and the foreign phone number of the foreign smart terminal and the domestic smart terminal of the other subscriber are received from the international smart terminal of the international roaming applicant, A call pseudo-guiding step of transmitting a domestic telephone number corresponding to the foreign telephone number to a domestic smart terminal through an Internet network and informing a callback approval decision request when the telephone number of the domestic telephone number is received via the Internet network; An approval step for accepting a callback from a domestic smart terminal; The routing setting step and the call connection request step for the call from the domestic smart terminal to the overseas smart terminal are sequentially performed to make an international call.

A plurality of the domestic international switches are provided, and different relay numbers are assigned, and connection is made according to a call request through their intermediary number. The routing control register sets routing information for each domestic international switch Wherein the route setting step sets routing of a selected domestic international switch by selecting any one of a plurality of domestic international switches, and the call connection request step transmits the relay number allocated to the selected domestic international switch to the Internet The routing information is transmitted to the domestic smart terminal and the routing information is transmitted to the domestic international switch selected in the routing setting step so that the international call is made through the selected domestic international switch. The.

The present invention as described above is an international roaming method implemented by incorporating an international roaming service application, an international call request, a roaming service, and a call routing specification in a route control register. Therefore, It is convenient to use as an application installed in a smart terminal from the viewpoint of a user. It requests a call to an Internet network which is capable of transmitting short data necessary for a call request in a packet, requests a call almost simultaneously from a sender and an international switch, And the time required for the call connection can be greatly shortened.

In addition, since the roaming applicant wants to make a call to a home country from abroad when he / she wants to make a call from abroad, he or she can make a cheap international call at home after a simple approval procedure through the Internet network, And it is convenient to use waiting time less to minimize because it is made up of the Internet network and the call request procedure in the foreign country and the call approval process of the domestic terminal are completed within a short time and the call is immediately switched to the international call.

1 is a configuration diagram of a communication network for realizing an international roaming method according to an embodiment of the present invention;
2 is a flowchart of an international roaming method according to an embodiment of the present invention.
FIG. 3 is a detailed flowchart of the international call step S30 in the international roaming method according to the embodiment of the present invention. FIG.
FIG. 4 is a detailed flowchart of the international international calling step (S40) in the international roaming method according to the embodiment of the present invention.
5 is a configuration diagram of a communication network for explaining an international roaming method according to another embodiment of the present invention.
6 is a configuration diagram of a communication network for explaining an international roaming method according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that, in the drawings, the same reference numerals are used to denote the same or similar components in other drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a configuration diagram of a communication network for realizing an international roaming method according to an embodiment of the present invention.

Referring to FIG. 1, the communication network is connected to the domestic public switched telephone network 10 and the foreign public switched telephone network 20 via an international communication network, and makes an international call. The domestic public switched telephone network 10 and the foreign public switched telephone network 20 are constituted by a public switched telephone network (PSTN) to enable communication between domestic and overseas terminals as well as domestic terminals, As is well known in the art or the pre-established network technology, by forming a communication path sequentially passing through a plurality of nodes by the sequential link operation of the plurality of nodes 12 and 22, . Here, the nodes 12 and 22 include a base station center and a mobile switching center in the case of a mobile communication network, and a local switch and a toll switch in a wired communication network in connection with a wired communication network.

The domestic public switched telephone network 10 and the foreign public switched telephone network 20 each have the international switches 11 and 21 connected to the international communication network so that the international switches 11 and 21 and the International Switching Center The international public switched telephone network may be linked by a plurality of communication carriers, and the international switch may be composed of a plurality of communication carriers by a plurality of communication carriers. The international switch may be regarded as an international communication network, but it is explained as a public switched telephone network for convenience, and the international communication network is explained as a line connecting two or more countries in FIG. 1, but connecting to a plurality of countries. Such a communication network is a known technology, and a detailed description thereof will be omitted.

The international roaming method according to the present invention is characterized in that an international roaming service is provided to a so-called free international call that connects an international telephone through a relay number to make an international call at an inexpensive call rate that is equivalent to a domestic call charge, The user who subscribed to the international roaming service is allowed to make an international call to the international roaming service applicant at an inexpensive call charge rate while the user is staying in the foreign country.

Conventional free international calls and international roaming services will be briefly described as follows.

In the conventional free international call, a call request is made from a terminal requesting an international call to a domestic relay number, and then a called party's telephone number (foreign telephone number) is transmitted. Ask the international telephone to call the called party's telephone number through the international switch to open the channel. In other words, since a call is requested to a relay number of a domestic number in the case of a terminal making an international call, the domestic call charge is charged, so that the international call can be made at a low cost similar to that of the domestic call. In such a free international call, the called party's telephone number should be transmitted at the time of the call request to the relay number. The called party's telephone number is transmitted to the server of the call transfer node using the data communication function of the smart terminal such as smart phone or smart pad Or by a dual tone multi frequency (DTMF) method.

Next, the conventional international roaming service is a service for allowing a terminal user who is assigned a domestic telephone number to access a domestic public switched telephone network, Even if an overseas telephone number is assigned to use a public switched telephone network, it is possible to call a domestic telephone number from abroad. Such an international roaming service relays a domestic telephone number and an overseas telephone number into a database and then transfers the telephone number to a foreign telephone number when a call request is made to the domestic telephone number. Recently, the smart terminal has been used in Korea, but it has been changed from a foreign country to a universal subscriber identity module (USIM), so that the smart terminal opened in Korea is used as it is. It also saves money on calls.

However, the above-mentioned international roaming service requires a fee-saving method using a free international call because domestic roaming service is charged to domestic users who make a call, and international roaming charges are applied to overseas roaming callers receiving a telephone call. In addition, It is necessary to shorten the time required for the international roaming service, and it is also necessary to simplify the application of the international roaming service. These needs and requirements are achieved by the present invention.

An international roaming method according to an embodiment of the present invention includes setting routing information of a domestic international switch 11 and transmitting routing information to a domestic international switch 11 to make a link operation according to routing information, The smart terminal 1 or 2 used by a subscriber who subscribes as a member accesses the Internet network 30 and performs data communication with the route control register 40. The relay number is used as a call request number By connecting to the domestic public switched telephone network 10, an application for forming a communication path with the domestic international switch 11 by call transfer is built in.

Here, the routing information includes at least one of an international telephone number corresponding to the domestic telephone number of the international roaming applicant, a telephone number of the domestic smart terminal requested to make a call, command information for attempting an international call connection to the foreign telephone number, And link information for linking to the foreign side access line for attempting to make an international call connection by identifying the line as a telephone number of the domestic smart terminal that requested the call. That is, the routing information is transmitted to the domestic international switch 11 to make an international call connection through an international line to an overseas telephone number, and to connect to a domestic line and an overseas telephone number of a telephone number accessed through a relay number Link the overseas connection lines that attempted international call connection.

First, in order to receive a service by the international roaming method according to the present invention, a user joining as a member installs the application in his / her smart terminal and registers user information in the route control register 40. Thus, the information of the subscriber is converted into a database in the route control register 40. The information of the subscriber basically includes the subscriber's domestic telephone number and login information.

First, the application has a function of requesting international roaming, and when the subscriber who departs from the subscriber and stays abroad changes the USIM of the country, the application transmits the foreign telephone number allocated to the USIM to the route control To the register 40. Accordingly, the route control register 40 stores the domestic telephone number of the subscriber and the overseas telephone number in a database in correspondence with each other. Here, if the smart terminal of the subscriber staying overseas is a domestic smart terminal used in Korea, it is not necessary to additionally install the application, but if the smart terminal is used in a foreign or new way, It is necessary to connect to the route control register 40 through the connection control unit 30 and connect using the login information.

The application has a call menu, and the country location information is automatically set by the USIM or manually set by the user, and is classified according to whether the smart terminal is a domestic smart terminal or an overseas smart terminal.

Referring to FIG. 1, in a situation where a foreign smart terminal 2 requesting international roaming is a called terminal and a call is requested from a domestic smart terminal 1 of another subscriber, Or if the telephone number of the called party is requested to call the telephone number of the called party, the caller's telephone number is automatically connected to the Internet network 30 and transmitted to the route control register 40 And waits for a while until the notification comes from the route control register 40. Herein, the term " wait for a while " means data communication through the Internet network 30, so that it takes a very short time. The called party telephone number is an invention providing the international roaming service of the present invention. do.

The above-mentioned notification conveys the call request permission information indicating that the call connection to the domestic public switched telephone network 10 made up of the PSTN can be attempted.

Then, the call connection attempted to the domestic public switched telephone network 10 is automatically switched by the application to a call connection to the relay number. That is, it does not connect to the called number. Here, it is not necessary to transmit the called party's telephone number when trying to establish a call connection to the domestic public switched telephone network 10, because it is transmitted to the route control register 40 through the Internet network 30. Therefore, since the time required for transmitting the called party's telephone number is not required when connecting the call through the relay number, the call connection time can be shortened. Of course, since the call is connected to the relay number, a communication path with the domestic international switch 11 is formed via each node 12 of the domestic public switched telephone network 10.

Next, in a situation where a call is requested from a foreign smart terminal 2 of a subscriber who has applied for international roaming to a domestic smart terminal 1 used by another subscriber, a call menu of an application installed in the foreign smart terminal is selected, The route control register 30 is accessed via the Internet network 30 by inputting the called party's telephone number or requesting a call using the previously stored telephone number as the called party's telephone number (i.e., requesting the domestic smart terminal to call the called party's telephone number) And requests a call-back while transmitting the called party's telephone number. Here, the callback is that the foreign subscriber delivers the call only to the domestic subscriber, and the actual call is made when the domestic subscriber requests the foreign subscriber to make a call. Accordingly, the route control register 30 informs the domestic smart terminal 1 of the call back approval decision through the Internet network 30, and when the call back is approved, requests the foreign smart terminal 2 to request the call Sets the routing of domestic international switches.

As described above, the communication between the domestic smart terminal 1 and the foreign smart terminal 2 used by the subscribers is performed by the route control register 40, and the execution of the present invention by the route control register 40 The international roaming method according to the example will be described with reference to FIG. 2 to FIG.

First, the route control register 40 is connected to the domestic international switch 11 to set the routing of the domestic international switch 11. The domestic international switch 11 is a switch for connecting a domestic line, which is a communication route formed through the node 12 of the domestic public switched telephone network 10, to an international line, as described above.

In addition, as described above, when the application installed in the smart terminal of the subscribed sender accesses the domestic public switched telephone network 10 and requests a call to the relay number, the smart terminal requesting the call through the relay number is transmitted to the domestic international switch The relay number is converted into the telephone number of the caller by the preliminary agreement with the communication carrier of the connecting node and is connected to the domestic international switch 21. That is, the smart terminal of the subscribed sender is switched to connect to the international switch 21 via the relay number to form a communication path.

At this time, the routing setting of the domestic international switch 11 by the route control register 40 sets the routing number of the foreign smart terminal to the called terminal and calls the called terminal through the international communication network and the foreign public switched telephone network 20 And establishing a communication path between the domestic smart terminal and the foreign smart terminal by linking the domestic side connection line and the foreign side connection line in the domestic international switch 11 .

In addition, the route control register 40 is capable of data communication with the subscriber's smart terminal through the Internet network 30.

A smart terminal user using the international roaming method according to the embodiment of the present invention configured by the route control register 40 as described above must first install the application in his / her smart terminal and become a subscriber (S1). The subscription includes a registration process including access to the route control register 40 through the Internet network 30 and registration of a domestic telephone number and login information through the execution of the application. The registration related information is stored in the route control register 40 in the form of a database.

Next, when receiving an application for an international roaming service from a subscriber who intends to use the international roaming method according to the embodiment of the present invention, the route control register 40 accepts the international roaming service and converts it into a database. The accepting of the international roaming application is received from the smart terminal of the applicant who accesses through the Internet network 30. At this time, regardless of whether the smart terminal of the applicant is domestic or overseas, , Receives overseas telephone numbers used during overseas stay at reception, and converts them into a database in response to domestic telephone conversation. Preferably, it is desirable to apply for an international roaming service while abroad.

Thereafter, the route control register 40 receives a call request (S10) for accepting a call request from the smart terminal of the subscriber through the Internet network 30, if any; A sender identification step (S20) of confirming whether the sender's smart terminal is a domestic smart terminal (1) or an overseas smart terminal (2) who has requested international roaming; A domestic international call step S30 to be executed when the caller identification is confirmed by the domestic smart terminal 1 in step S20; An overseas international call step S40 to be executed when the foreign smart terminal 1 is confirmed in the caller identification step S20; .

The call request accepting step S10 is a step of accepting a call request by receiving a telephone number of the subscriber and a telephone number of the called party from the smart terminal of the subscriber connected through the Internet network 30, Terminal or an overseas smart terminal. Here, the domestic smart terminal or the overseas smart terminal is a smart terminal of the subscriber who receives a call request through the Internet by the application, and in particular, the foreign smart terminal stays overseas and transmits the international roaming service It is the terminal of the subscribed subscriber.

If the called terminal is a domestic smart terminal, the called party's phone number is the international roaming applicant's domestic phone number, and if the called terminal is the international roaming applicant's foreign smart terminal, the called party's phone number is the domestic smart terminal's phone number. In this case, the application may be configured to automatically receive the telephone number of the terminal that has requested the call or automatically recognize the authentication when the smart terminal accesses the domestic international switch 11 through the Internet network. The telephone number of the call requester is needed for further operation.

The caller identification step S20 is a step for confirming whether the call request received through the Internet 30 is a domestic smart terminal or an overseas smart terminal. For example, it may be confirmed by a phone number of a terminal requesting a call. Here, if the domestic smart terminal is a domestic smartphone, step S30 will be executed, and if it is an overseas smartphone, step S40 will be performed.

3, the domestic international call step S30 is performed by the smart terminal of the domestic subscriber by the domestic call of the international roaming applicant by the call request accepting step (S10) and the caller confirming step (S20) Number is received via the Internet network, and includes a routing setting step S31 and a call connection requesting step S32.

Here, the routing setting step S31 determines the routing information transmitted to the domestic international switch. The routing information includes an international telephone number corresponding to the domestic telephone number of the international roaming applicant, a telephone number of a domestic smart terminal to communicate with the international smartphone of the international roaming applicant, command information to attempt an international telephone call to an international telephone number, And link information for identifying the domestic side connection line as a telephone number of the domestic smart terminal and connecting to the foreign side connection line for making an international call request.

The call connection request step S32 is a step of delivering the determined routing information to the domestic international switch and notifying the domestic smart terminal. Here, the notification is a notification for notifying the fact that the domestic smart terminal can make a call request through the intermediary number, by transmitting the call request permission information.

Accordingly, the domestic international switch attempts to make an international call connection with the foreign telephone number as the called number according to the received routing information (S33), and prepares for linking.

In addition, the domestic smart terminal attempts to establish a call connection via the relay number by the application (S34). Since the domestic telephone number of the international roaming applicant is received in the step S10 of receiving the call request, it is not necessary to transmit the telephone number when the call connection is attempted through the relay number. Then, the call connection attempt through the relay number is a domestic call connection attempt to make a call connection between the domestic smart terminal of the caller and the domestic international switch.

In this case, the time difference between the international call connection attempt by the routing information and the domestic call connection attempt by the notification depends on the data communication time through the Internet network and the time required for routing transmission. For example, It is seen that there is a very short time difference between 0.3 seconds and 0.8 seconds under the communication environment, so that an attempt to connect an international call and a call to a domestic call are almost simultaneous. Accordingly, the time required for forming an international communication path between a domestic smart terminal and an overseas smart terminal can be reduced to almost half.

Meanwhile, the domestic international switch 11 is provided with a plurality of domestic-side connection lines and a plurality of foreign-side connection lines. As described above, since the domestic smart switch 11 is ready to link according to the routing information, (S34), it identifies which domestic connection line is connected to the telephone number of the domestic smart terminal, and links to the selected foreign connection line at the international call connection attempt (S35). Of course, by recognizing the telephone number of the domestic smart terminal that has made the call request through the Internet in the step of receiving the call request, when the telephone number of the domestic smart terminal is set in the routing setting step (S31) Information to be used to identify the domestic side access line in the domestic international switch.

Accordingly, the domestic side connection line and the foreign side connection line are linked with each other (S35), so that an international call connection between the domestic smart terminal and the overseas smart terminal is completed (S36).

The overseas international call step S40 will be described with reference to FIG. 4. As described above, the overseas international call step S40 is performed from the overseas smart terminal of the subscriber who has applied for the international roaming service by the call request reception step S10 and the caller identification step S20 (S41), an approval step (S42), a routing setting step (S43), and a call connection requesting step (S44) are executed when the mobile communication terminal receives its own overseas phone number and a telephone number of a domestic smart terminal of another subscriber. ).

The call instruction step S41 is a step of transmitting a domestic telephone number corresponding to the foreign telephone number of the foreign smart terminal to the domestic smart terminal through the Internet network to guide a callback approval decision request. At this time, the subscriber who owns the domestic smart terminal responds to the guidance, and the application has an operation processor for asking for such a call and obtaining an answer thereto.

The approval step S42 is a step of accepting a callback from a domestic smart terminal after the call instruction step S41. If the call back is not permitted, the fact is informed to the foreign smart terminal, that is, the foreign smart terminal which requested the call in the call request receiving step (S10), so that it can adopt the international communication method other than the international phone service provided by the present invention It is good to have.

After the callback is approved in the approval step S42, the routing setting step S43 and the call connection requesting step S44 are executed. At this time, the routing setting step S43 and the call connection requesting step S44 are the same as the routing setting step S31 and the notification step S32 of the domestic international call step S30, respectively. That is, a domestic smart terminal that has approved a call will make an international call to an overseas smart terminal. Similarly, according to the routing information set by the routing setting step S43, the domestic international switch 11 attempts to make an international call connection to the foreign smart terminal that has requested the call (S45) The domestic smart terminal which is notified of the notification to the smart terminal sends a call request to the domestic international switch 11 by the application with the intermediary number (S46). If the domestic and international call connection attempt is successful The domestic side connection line of the international switch 11 and the foreign side connection line are linked (S47) and the international call is connected (S48).

However, the contents notified to the domestic smart terminal through the call connection request step (S44) in the international international call step (S40) may be different from the domestic international call step, for example, , The smart phone informs the domestic smart terminal to try to connect the domestic call with the intermediary number. At this time, it is preferable that the application installed in the smart terminal of the subscriber is configured to attempt to make a domestic call connection upon receiving such a notification.

Of course, since the telephone number of the foreign smart terminal and the telephone number of the domestic smart terminal can be known in the reception step (S10), the routing can be set.

5 is a configuration diagram of a communication network for explaining an international roaming method according to another embodiment of the present invention.

5, it can be seen that a plurality of domestic international switches 11 are installed in the domestic public switched telephone network 10, and a variety of communication routes connecting from the domestic to the international network are available. That is, not only the main communication service provider but also the special service communication service provider can install the domestic international switch 11 or lease it from the main communication service provider and can operate the domestic international switch 11 and the domestic international switch 11, There may be a plurality of communication service providers providing international telephone service using a node for transferring a call request based on a number to a caller's telephone number. For example, a telecommunication service provider may assign a representative telephone number such as 1666 - ****, 1577 - ****, 1566 - ****, etc. in Korea and operate a call to each representative telephone number To the domestic international switch (11).

Accordingly, a plurality of domestic international switches, which are assigned to different relay numbers by a plurality of communication carriers and are connected by call transfer, are configured to be routed in the route control register 40, respectively. Thus, Each time a telephone connection is requested, in the routing setting step (S31, S43), one of a plurality of domestic international switches is selected and routing is set.

In the call connection request step (S33, S45), routing information is transmitted to the domestic international switch selected in the routing setting step (S31, S43), and to the domestic international switch selected in the routing setting step (S31, S43) And notifies the domestic smart terminal of the assigned relay number.

Then, the domestic smart switch attempts to establish an international call connection (S33, S45) from the domestic international switch that has received the routing information from among the plurality of domestic international switches, and the domestic smart terminal attempts to establish a telephone connection with the notified relay number (S34, S46) and is connected to the selected domestic international switch in the routing setting step (S31, S43).

As a result, the international call is made by the links S35 and S47 in the domestic international switch selected in the routing setting steps S31 and S43 (S36 and S48).

In the routing setting step (S31, S43), which one of the plurality of domestic international switches is selected may be determined in advance by a method in which the order is determined in advance and the international call is sequentially allocated according to the order of the international call requests, And a method of selecting the least number of lines for which international communication is being performed.

6 is a configuration diagram of a communication network for explaining an international roaming method according to another embodiment of the present invention.

6, an overseas route control register 50 for setting the routing of the foreign international switch 21 is provided in the same manner as the route control register 40 installed in the domestic network. In other words, in the country where the foreign route control register 50 is installed, the international roaming method according to the present invention can be obtained by joining the member as a domestic member.

Here, it is preferable that the foreign route control register 50 and the domestic route control register 50 are interlocked with each other.

For example, when a domestic smart terminal makes an international call to a country in which the foreign route control register 50 is installed, the routing setting step (S31, S43) is executed in the domestic route control register 40, , Performs the routing setting step (S31, S43), performs the foreign routing setting step, and then performs the call connection request step (S32, S44). Here, in the foreign routing setting step, the domestic route control register 40 transmits the foreign telephone number to the foreign route control register 50 through the Internet network 30, and attempts to establish a telephone connection with the foreign telephone number from the foreign country And setting the routing of the foreign international switch 21 of the country.

That is, while attempting to establish a telephone connection to the international network by using the international telephone number in the domestic international switch 11, the international international switch 21 also transmits the international telephone number (in this case, Let's try to make a telephone connection with The foreign side connection line is a connection line connected by a telephone connection attempt of the domestic international switch 11 and the domestic side connection line is a connection line Is a connection line for making telephone connection to the foreign telephone number, which is the telephone number of the local station, so that both connection lines are linked to each other. Accordingly, the time required for the telephone connection between the domestic international switch 11 and the overseas smart terminal 2 can be shortened.

Of course, the domestic route control register 40 transmits the line information indicating which line the domestic international switch 11 is attempting to connect to the international route through the international network to the foreign route control register 50, The link information should be linked according to the line information.

As described above, the international roaming method according to the present invention can be applied to an international roaming service through an Internet network, a quick and easy international call request via the Internet network, a cheap international call according to a domestic call charge, It provides convenience not only for communication cost reduction but also for convenience of use. It is integrated by route control register that sets the routing of the international switch. Therefore, there is no time delay due to distributed operation, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, . ≪ / RTI > Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

1: Domestic Smart Terminal 2: Overseas Smart Terminal
10: Public Switched Telephone Network (PSTN)
11: International Switching Center (ISC)
20: Public Switched Telephone Network (PSTN)
21: International Switching Center (ISC)
30: Internet network
40: Route control register (route control register)

Claims (3)

delete A domestic smart terminal requests a call through a relay number and establishes routing of a domestic international switch linking a domestic line connected to a domestic telephone number of a domestic smart terminal to an international line by a call transfer, When a call request is made from a smart terminal of a subscriber in which an application that requests a call through a relay number is installed, the terminal is negotiated with a communication carrier in advance and is connected to the domestic international switch through a relay number, An international roaming method in which the routing is set to connect to a telephone number of a called party so that an international call is made, and a smart control terminal is also connected to an internet network,
Receiving a roaming application for receiving an international telephone number from an overseas smart terminal of an international roaming applicant through an Internet network and converting the received international telephone number into a database corresponding to a domestic telephone number of an international roaming applicant;
A call request reception step of receiving a telephone number of a domestic smart terminal and a domestic telephone number of an international roaming applicant from a domestic smart terminal requesting a call with an international roaming applicant among domestic smart terminals of other subscribers through an Internet network;
A domestic telephone number of the domestic smart terminal requested to make a call, command information for an international call connection attempt to the international telephone number, and a domestic connection line to the domestic smart terminal A routing setting step of establishing routing information including link information for identifying a telephone number of a foreign telephone and connecting to an overseas connection line that has attempted to make an international call to the foreign telephone number;
Transmits the confirmed routing information to the domestic international switch and notifies the domestic smart terminal of the call request permission information through the Internet network so that the domestic smart terminal makes a call request through the relay number, A call connection request step of making an international call connection according to the information and making a call connection by link information;
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The call request accepting step includes:
It is possible to receive a call request from the overseas smart terminal of the international roaming applicant through the Internet,
When a domestic telephone number of an international roaming applicant is received from a domestic smart terminal, the route setting step and the call connection request step are sequentially performed,
When receiving an international telephone number of an overseas smart terminal and a telephone number of a domestic smart terminal of another subscriber from an international smart terminal of an international roaming subscriber requesting a call with a domestic smart terminal of another subscriber,
Transmitting a domestic telephone number corresponding to the foreign telephone number to a domestic smart terminal through the Internet to guide a callback approval decision request;
An approval step for accepting a callback from a domestic smart terminal;
The routing setting step and the call connection request step for communication from the domestic smart terminal to the foreign smart terminal;
In order to make an international call. 3. The method of claim 2,
A plurality of domestic international switches are provided, and different relay numbers are assigned, and connection is made according to a call request through their respective broker numbers,
The routing control register is configured to set routing information for each domestic international switch,
Wherein the routing setting step sets routing of the selected domestic international switch by selecting any one of the plurality of domestic international switches,
The call connection request step may include transmitting the relay number assigned to the selected domestic international switch to the domestic smart terminal through the Internet network, requesting the telephone number to the relay number transmitted, and at the same time, Forwarding routing information to make an international call through the selected domestic international switch.

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