KR100807907B1 - System and method providing ring back tone of international roaming - Google Patents

Abstract

The present invention relates to a system and method for providing an international roaming ring back tone, wherein in providing an international roaming service, a virtual ring back tone is generated and provided to a calling party at a calling mobile switching center, thereby making a call without a silent period when making a call. It provides ring tone, and even if you make a call to a different destination mobile switching center several times, you can always receive the same ring tone, and if the called party is subscribed to the ring back alternate service, instead There is an advantage that can provide a preset call connection replacement sound to the calling party subscriber.

International roaming, ring back tone, virtual ring back tone, ring back tone

Description

System and method for providing international roaming ring back tone {SYSTEM AND METHOD PROVIDING RING BACK TONE OF INTERNATIONAL ROAMING}

1 is a system configuration diagram of a domestic mobile communication network and a foreign mobile communication network for providing an international roaming service,

2 is a system configuration diagram of a calling mobile communication network for providing an international roaming service;

3 is a flowchart of an international roaming service according to the prior art;

4 is a flowchart of an international roaming service according to a first embodiment of the present invention;

5 is a system configuration diagram of a calling mobile communication network capable of providing an international roaming ring back tone service according to a second embodiment of the present invention;

6 is a flowchart of an international roaming service according to a second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10, 20: mobile communication network 11, 21: gateway for mobile phone gateway

13, 23: mobile switching center 22: base station

24: base station controller 25: home location register

26 Global Location Register 27: Alternate Ringing Device

30: international signaling network 40: international telephone network

The present invention relates to an international roaming call, and more particularly, to an international roaming ringback tone providing a virtual ring back tone or a ringback replacement tone in an originating communication network in serving an international roaming call. System and method.

In the current mobile communication service, roaming service that provides mobile phone call origination and incoming service to both subscribers in both regions by interworking agreement and system between mobile operators when mobile communication service subscriber visits overseas. It is called.

1 is a system configuration diagram of a domestic mobile communication network and an overseas mobile communication network for providing an international roaming service.

As shown in FIG. 1, an international roaming system includes an overseas mobile communication network 10 including a mobile telephone gateway exchange 11 and a mobile switching center 13, a mobile telephone gateway exchange 21, and a mobile switching center 23. Domestic mobile communication network (20), international mobile communication network (10) and international mobile communication network (10) used in the transmission of routing phone numbers between the domestic mobile communication network (20) and domestic mobile communication network (20) It is configured to include an international telephone network 40, etc. for the connection between the call.

Looking at the configuration of the calling party mobile communication network for the international roaming service provided through such an international roaming system in more detail, as shown in Figure 2, the mobile communication terminal 1, the mobile telephone gateway switching center 21, the base station 22 And a mobile switching center 23, a base station controller 24, a home location register 25, a global location register 26, and the like.

The mobile communication terminal 1 has a terminal function for the mobile subscriber to receive a mobile communication service, the base station 22 performs a wired or wireless connection function between the mobile communication terminal 1 and the base station controller 24, The control device 24 is located between the base station 22 and the mobile switching center 23 to perform base station management and control.

The mobile switching center 23 has a switching function for providing mobile communication services to mobile subscribers, and has functions such as circuit switching between subscribers, incoming and outgoing relay processing, handoff, and roaming.

The home location register 25 is a database center that manages the current location information of the mobile communication terminal 1 as well as the status, statistics, and various service related information of the mobile subscribers. It also provides interworking with other exchange functions.

The global location register 26 receives subscriber information of a mobile communication terminal to be moved out of the country from an international roaming center server (not shown), and also receives a global location of the foreign mobile communication network 20 through the international signal network 30. Hourly location information of the international roaming mobile communication terminal is received from the register and transmitted to the home location register 25.

The mobile telephone gateway exchange 21 is a part that performs various data processing and connection functions between exchanges, and is responsible for relaying between the domestic mobile switching center 23 and the foreign mobile switching center 13 through the international telephone network 40.

A process of providing a mobile communication roaming service in the international roaming system configured as described above will be described below with reference to FIGS. 1 to 3.

First, when a subscriber of a domestic mobile communication network 20 joins a roaming service and is located within a service area of an overseas mobile communication network 10, an arbitrary user makes a call to a subscriber identification number that is roaming in the foreign mobile communication network 10. request.

The mobile switching center 23 requests the destination location information from the home location register 25 (S51), and the home location register 25 requests routing information from the global location register 26 according to the request (S52). The location register 26 requests routing information from the mobile switching center 13 of the foreign mobile communication network 10 through the mobile telephone gateway switching center 21 and the international signaling network 30 (S53).

The mobile switching center 13 responds to the routing information to the global location register 26 via the international signaling network 30 and the mobile phone gateway 21 (S54), and the global location register 26 is the home location register 25. ), The home location register 25 responds to the mobile switching center 23 to the destination location information (routing phone number) (S56).

The mobile switching center 23 transmits an ISUP IAM (Initial Address Message) to the mobile switching center 13 of the foreign mobile communication network 10 through the mobile telephone gateway 21 and the international signaling network 30 based on the called location information. Start address message) to request an ISUP call connection (S57).

The mobile switching center 13 transmits an ISUP ACM (Address Complete Message) through the international signaling network 30 and the mobile phone gateway 21 in response to the ISUP IAM (S58). Here, the mobile switching center 13 provides a ring back tone through the international telephone network 40 and the mobile telephone gateway office 21 after the transmission of the ISUP ACM (S59).

When the ISUP ACM is received, the mobile switching center 23 switches to provide the ring back tone to the mobile communication terminal 1, and provides the ring back tone provided from the foreign mobile communication network 10 to the mobile terminal 1.

The mobile switching center 13 provides the ISUP ANM (Answer Message) to the mobile switching center 23 through the international telephone network 40 and the mobile telephone gateway switching center 21 when the incoming mobile communication terminal receives the ring signal. (S60).

Thereafter, the switching path between the mobile switching terminal 23 in the domestic mobile communication network 20 and the mobile switching station 13 in the foreign mobile communication network 10 establishes a call path between the calling mobile terminal and the called mobile terminal. It is connected via 40 (S61).

However, according to the conventional international roaming service as described above, the ringing tone generated by the called party is provided to the mobile terminal of the calling party. A delay time occurs according to the equipment characteristics of the called party's mobile switching center. There was a problem that the silence period (about 10 seconds to 12 seconds) occurs before the connection sound. Due to this silent period, the calling subscriber frequently abandoned the call connection, resulting in a low rate of completion of the call.

In addition, since the ring back tone generated by the called party's mobile switching center is provided to the calling party, the ring back tone is changed due to the different equipment characteristics of the called party's mobile station when several calls are connected, causing inconvenience to the calling party. .

In addition, the flow of call connection processing even if the called party is subscribed to the call connection substitute sound service, which is an additional service that wants to provide call connection substitute sound such as music, in place of the ring tone to the calling party that called the subscriber. There was a problem that the call replacement alternate sound is not provided.

The present invention has been proposed to solve such a conventional problem, and a first object is to provide a calling party subscriber by generating a virtual ring back tone at the calling mobile switching center in providing an international roaming service, thereby providing a silent period during call connection. It provides the ring back tone without receiving the call ring tone, so that the call ring tone is always provided even when the call is connected to different destination mobile switching centers several times.

A second object is to provide the calling party with a preset ring back replacement tone in place of the ring back tone when the called party subscribes to the ring back tone service.

The international roaming ring back tone providing system according to the first aspect of the present invention for realizing the above objects is an international roaming service when a subscriber of the first mobile communication network is located within a service area of the second mobile communication network after joining the international roaming service. A system for providing a service, comprising: a second mobile switching center and a second mobile telephone gateway switch providing a mobile communication service in a service area of the second mobile communication network, and a mobile communication service in a service area of the first mobile communication network. Provide a virtual ring back tone or a ring back tone to the calling subscriber when a call connection is attempted between the calling subscriber located in the service area of the first mobile communication network and the called subscriber located in the service area of the second mobile communication network. Providing a first mobile switching center and a first mobile telephone gateway switching center and said first moving It includes an international telephone network for connection to the Trust and the second mobile communication manganese international signaling network used for the transmission of the routing number for the the first mobile communication network and the second mobile communication manganese call.

An international roaming ring tone providing method according to a second aspect of the present invention is a method for providing an international roaming service when a subscriber of a first mobile communication network is located within a service area of a second mobile communication network after subscribing to an international roaming service. (a) requesting routing information from the first mobile communication network to the second mobile communication network through an international signal network when the calling subscriber in the first mobile communication network requests a call connection with the called subscriber in the second mobile communication network; (B) the second mobile communication network responding to the request for routing information and responding the routing information via the international signal network; and (c) the first mobile communication network responds to the received routing information. Requesting a call connection to a called subscriber in the second mobile communication network through an international signal network according to the present invention; and (d) requesting the call connection. Providing, by the first mobile communication network, a virtual ring back tone or a ring back tone to the calling subscriber while requesting; (e) if the called subscriber accepts the request for the call connection, the calling through the international telephone network; Connecting a call path between a subscriber and the called subscriber.

According to a third aspect of the present invention, a mobile communication system includes a mobile communication through a connection with a second mobile communication network when a subscriber of a first mobile communication network is located within a service area of a second mobile communication network after subscribing to an international roaming service. A mobile communication system of a first mobile communication network providing a service, comprising: a mobile communication terminal for providing a mobile communication service to a subscriber of the first mobile communication network, a base station performing a wireless connection function with the mobile communication terminal; A base station controller in charge of management and control of the base station, a mobile switching center having a switching function for providing the mobile communication service to a subscriber of the first mobile communication network, and current location information of the subscriber of the first mobile communication network; A home location register for managing status and service related information, and receiving said international roaming service; A global location register that manages subscriber information, which receives time-based location information of a subscriber located within a service area of the first mobile communication network from the second mobile communication network, and transmits the received location information to the home location register, and moves the first mobile communication network; And a mobile telephone gateway exchange station responsible for relaying between the switching center and the mobile switching center of the second mobile communication network, wherein the mobile switching center of the first mobile communication network or the mobile telephone gateway switching station is configured such that the subscriber of the first mobile communication network is configured as a subscriber. 2 When requesting a call connection to a subscriber who is roaming internationally in a mobile communication network, a virtual ring back tone to replace the ring back tone is generated and provided to the subscriber of the first mobile communication network.

According to a fourth aspect of the present invention, there is provided a mobile communication service method, wherein a subscriber of a first mobile communication network joins an international roaming service and is located within a service area of a second mobile communication network through connection with the second mobile communication network. A method of providing a mobile communication service to a subscriber of a first mobile communication network, the method comprising: (a) when a subscriber of the first mobile communication network requests a call to a subscriber identification number roaming to the second mobile communication network, the mobile switching center registers a home location register; Requesting the called location information from the mobile location gateway, (b) the home location register requesting routing information from the global location register according to the request of the mobile switching center, and (c) the global location register from the mobile telephone gateway exchange; Requesting routing information from a mobile switching center of the first mobile communication network through an international signaling network; and (d) the second mobile. When the routing information is answered from a trusted mobile switching center, the global location register responding to the home location register by routing the routing information; and (e) the home location register receiving the routing information is moved by the first mobile communication network. Responding the called location information to the switching center; and (f) the mobile switching center of the first mobile communication network to the mobile switching center of the second mobile communication network through the mobile telephone gateway and the international signaling network based on the called location information. Requesting a call connection, (g) generating a virtual ring back tone to replace the ring back tone by the mobile telephone gateway or mobile switching center of the first mobile telecommunication network; (h) when the subscriber of the second mobile communication network requests a call connection for the call connection request, Connecting a call path between a subscriber of a communication network and a subscriber roaming to the second mobile communication network.

According to a fifth aspect of the present invention, a mobile communication system includes a mobile communication system in connection with a second mobile communication network when a subscriber of a first mobile communication network is located within a service area of a second mobile communication network after joining an international roaming service. A mobile communication system of a first mobile communication network providing a service, comprising: a mobile communication terminal for providing a mobile communication service to a subscriber of the first mobile communication network, a base station performing a wireless connection function with the mobile communication terminal; A base station controller in charge of management and control of the base station, a mobile switching center having a switching function for providing the mobile communication service to a subscriber of the first mobile communication network, and current location information of the subscriber of the first mobile communication network; A home location register for managing status and service related information, and receiving said international roaming service; A global location register that manages subscriber information, and receives time-based location information of a subscriber located in a service area of the second mobile communication network from the second mobile communication network, and transmits the received location information to the home location register, and moves the first mobile communication network. Replaces the ring back tone when a mobile telephone gateway switching center responsible for relaying between the switching center and the mobile switching center of the second mobile communication network and a subscriber of the first mobile communication network request a call connection to a subscriber who is roaming internationally in the second mobile communication network. And a call connection replacement sound device providing a subscriber to the first mobile communication network.

According to a sixth aspect of the present invention, a mobile communication service method includes a method of providing a mobile communication service through an association with a second mobile communication network when a subscriber of a first mobile communication network is located within a service area of a second mobile communication network after subscribing to an international roaming service. A method of providing a mobile communication service to a subscriber of a second mobile communication network, the method comprising: (a) when a subscriber of the first mobile communication network requests a call to a subscriber identification number roaming to the second mobile communication network, the mobile switching center registers a home location register; Requesting the called location information from the mobile location gateway, (b) the home location register requesting routing information from the global location register according to the request of the mobile switching center, and (c) the global location register from the mobile telephone gateway exchange; Requesting routing information from a mobile switching center of the second mobile communication network through an international signaling network; and (d) the second mobile. When the routing information is answered from a trusted mobile switching center, the global location register responding to the home location register by routing the routing information; and (e) the home location register receiving the routing information is moved by the first mobile communication network. Responding the called location information to the switching center; and (f) the mobile switching center of the first mobile communication network to the mobile switching center of the second mobile communication network through the mobile telephone gateway and the international signaling network based on the called location information. Requesting a call connection, and (g) the mobile switching center of the second mobile communication network makes a call to the call connection replacement tone device based on the call connection replacement tone information included in the called location information received in step (e). Requesting a ring back tone, and (h) the call back ring tone device requesting a request of a mobile switching center in the first mobile communication network. Providing a call connection replacement sound to a subscriber of the first mobile communication network; and (i) when the subscriber of the second mobile communication network requests a call connection for the call connection request, the subscriber of the first mobile communication network. Connecting a call path with a roaming subscriber to the second mobile communication network.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

It is an object of the present invention to provide a virtual ring back tone or a ring back replacement tone in an originating communication network in servicing international roaming calls.

The following description will be divided into a first embodiment for providing a virtual ring back tone and a second embodiment for providing a replacement ring tone.

<First Embodiment>

4 is a flowchart of an international roaming service according to a first embodiment of the present invention, which may be provided by the international roaming service system illustrated in FIGS. 1 and 2.

In the calling mobile communication network system for providing the international roaming service shown in Fig. 2, the components of which the role is greatly changed are the mobile switching center 23 and the mobile phone gateway 21.

Conventionally, when providing an international roaming call service, a ring back tone provided by a called party's mobile switching center is provided to a calling party's subscriber (mobile communication terminal). 23 or the mobile telephone gateway office 21 provides a virtual ring back tone generated by itself to the calling party subscriber.

Referring to FIG. 4, a method for providing an international roaming ring back tone according to the first embodiment of the present invention, when a domestic communication network subscriber requests a call connection with a subscriber identification number roaming to an overseas communication network, the domestic communication network is an international signal network. Requesting routing information to an external communication network through S101 to S103, and responding routing information to an external communication network through an international signal network according to a request for routing information of the domestic communication network (S104 to S106); Transmitting a call setup request message to a foreign communication network through an international signaling network based on the routing information (S107); and when the foreign communication network responds to the call setup request message, the domestic communication network generates a virtual ring back tone and connects the call. (S108-S109), and the called subscriber roaming to a foreign communication network connects to the calling subscriber who has requested the call. If the response to the request, and a step (S110~S111) for connecting a call between the called subscriber is roaming in a foreign network of the calling subscriber local area network.

A process of providing a virtual ring back tone by the international roaming ring back tone providing method configured as described above will be described with reference to FIGS. 1, 2, and 4.

First, when a subscriber of a domestic mobile communication network 20 joins a roaming service and is located within a service area of an overseas mobile communication network 10, an arbitrary user makes a call to a subscriber identification number that is roaming in the foreign mobile communication network 10. request.

The mobile switching center 23 requests the destination location information from the home location register 25 (S101), and the home location register 25 requests routing information from the global location register 26 according to the request (S102). The location register 26 requests routing information from the mobile switching center 13 of the foreign mobile communication network 10 through the mobile telephone gateway switching center 21 and the international signaling network 30 (S103).

The mobile switching center 13 responds to the routing information to the global location register 26 via the international signal network 30 and the mobile phone gateway 21 (S104), and the global location register 26 is the home location register 25. ), The home location register 25 returns the destination location information (routing phone number) to the mobile switching center 23 (S106).

The mobile switching center 23 transmits an ISUP IAM (Initial Address Message) to the mobile switching center 13 of the foreign mobile communication network 10 through the mobile telephone gateway 21 and the international signaling network 30 based on the called location information. Start address message) to request an ISUP call connection (S107).

The mobile switching center 13 transmits an ISUP ACM (Address Complete Message) through the international signaling network 30 and the mobile phone gateway 21 in response to the ISUP IAM (S108).

When the ISUP ACM is received, the mobile switching center 23 switches to provide a virtual ring back tone to the mobile communication terminal 1, and the mobile telephone gateway exchange 21 generates a virtual ring back tone that can replace the ring back tone. To the mobile communication terminal 1 (S109).

Here, instead of providing the virtual ring back tone at the mobile telephone gateway switch 21, a virtual ring back tone may be generated at the originating mobile switching station 23 and provided to the mobile communication terminal 1.

In addition, when the service flow of the called party is not changed in comparison with the prior art, the mobile switching center 13 provides the ring back tone through the international telephone network 40 and the mobile telephone gateway exchange 21 after the transmission of the ISUP ACM. . In this way, the ring back tone transmitted after the silent period by the mobile switching center 13 is discarded by the mobile phone gateway 21 or the mobile switching center 23.

At this time, the important point is that the silent section is generated before the provision of the ring-up sound according to the prior art, but the silent section is not generated before the provision of the ring-up sound according to the present invention. Therefore, the embodiment may be modified to provide the virtual RBT only in the silent period, and then provide the RBT with the calling party subscriber.

Next, the mobile switching center 13 transmits the ISUP ANM (Answer Message) through the international telephone network 40 and the mobile telephone gateway exchange 21 when the incoming mobile communication terminal receiving the ring signal responds. Provided in (S110).

Thereafter, the switching path between the mobile switching terminal 23 in the domestic mobile communication network 20 and the mobile switching station 13 in the foreign mobile communication network 10 establishes a call path between the calling mobile terminal and the called mobile terminal. It is connected via (4) (S111).

Second Embodiment

5 is a system configuration diagram of a calling mobile communication network capable of providing an international roaming ring tone service according to a second embodiment of the present invention, and FIG. 6 is a flowchart of an international roaming service according to a second embodiment of the present invention. .

When the calling mobile communication network system for providing the international roaming service shown in FIG. 5 is compared with the calling mobile communication network system shown in FIG. 2, the components whose role is greatly changed are the mobile switching center 23 and the mobile telephone gateway exchange ( 21), the call replacement replacement sound device 27 is added.

According to the first embodiment of the present invention, when providing an international roaming call service, the mobile switching center 23 or the mobile telephone gateway 21 which is the calling mobile communication network provides the calling subscriber with the virtual ring back tone generated by the calling subscriber. According to the second embodiment of the present invention, if the called party who is roaming internationally is subscribed to the call replacement substitute service, the call replacement substitute device 27 is provided to the calling party subscriber.

Referring to the method for providing an international roaming ring back tone according to the second embodiment of the present invention with reference to FIGS. 5 and 6, when a domestic communication network subscriber requests a call connection with a roaming subscriber identification number to a foreign communication network, a domestic communication network is provided. Requesting routing information from an external communication network through an international signal network (S201 to S203), responding routing information through an international signal network according to a request for routing information from a domestic communication network (S204 to S206); In step S207, the domestic communication network transmits a call establishment request message to the foreign communication network via the international signaling network based on the routing information, and when the domestic communication network responds to the call establishment request message, the domestic communication network generates a call connection replacement sound. Step (S208 to S209) to provide the calling subscriber requesting a call connection, and the called subscriber roaming to the foreign communication network communicates. And responding to the call connection request, connecting the call paths between the calling subscriber of the domestic communication network and the called subscriber roaming to the foreign communication network (S211 to S212).

A process of providing a call replacement substitute sound by the method for providing an international roaming ring back tone configured as described above will be described with reference to FIGS. 1, 5, and 6.

First, when a subscriber of a domestic mobile communication network 20 joins a roaming service and is located within a service area of an overseas mobile communication network 10, an arbitrary user makes a call to a subscriber identification number that is roaming in the foreign mobile communication network 10. request.

The mobile switching center 23 requests the destination location information from the home location register 25 (S201), and the home location register 25 requests routing information from the global location register 26 according to the request (S202). The location register 26 requests routing information from the mobile switching center 13 of the foreign mobile communication network 10 through the mobile telephone gateway switching center 21 and the international signaling network 30 (S203).

The mobile switching center 13 responds to the routing information to the global location register 26 via the international signal network 30 and the mobile phone gateway 21 (S204), and the global location register 26 is the home location register 25. ), The home location register 25 returns the destination location information (routing phone number) to the mobile switching center 23 (S206).

The mobile switching center 23 transmits an ISUP IAM (Initial Address Message) to the mobile switching center 13 of the foreign mobile communication network 10 through the mobile telephone gateway 21 and the international signaling network 30 based on the called location information. Start address message) to request an ISUP call connection (S207).

The mobile switching center 13 transmits an ISUP ACM (Address Complete Message) through the international signaling network 30 and the mobile telephone gateway 21 in response to the ISUP IAM (S208).

When the ISUP ACM is received, the mobile switching center 23 switches to provide the ring back tone to the mobile communication terminal 1, and the incoming subscriber who is roaming overseas through the home location register 25 is subscribed to the ring back tone service. If it is confirmed that the call connection replacement sound device 27 to request the call connection replacement sound (S209).

Looking at the request process of the call connection substitute tone in more detail, the incoming call location information transmitted in step S206 is transmitted including the call connection replacement tone information of the incoming subscriber roaming abroad. In response to this, the mobile switching center 23 requests the call connection replacement tone set by the called party based on the call connection replacement tone information obtained in step S206.

The call connection replacement device 27 extracts the call connection replacement sound set by the called subscriber according to the request of the mobile switching center 23 and transmits it to the mobile switching center 23, and the mobile switching station 23 is connected to the switched mobile communication terminal. Provides the call connection substitute sound to (1) (S210).

In addition, when the service flow of the called party is not changed in comparison with the prior art, the mobile switching center 13 provides the ring back tone through the international telephone network 40 and the mobile telephone gateway 21 after the transmission of the ISUP ACM. do. In this way, the ring back tone transmitted after the silent period by the mobile switching center 13 is discarded by the mobile phone gateway 21 or the mobile switching center 23.

In this case, the important point is that the silent section is generated before the provision of the RBT according to the prior art, but the silent section is not generated before the provision of the RBT.

Next, the mobile switching center 13 transmits the ISUP ANM (Answer Message) through the international telephone network 40 and the mobile telephone gateway exchange 21 when the incoming mobile communication terminal receiving the ring signal responds. Provided as (S211).

Thereafter, the switching path between the mobile switching terminal 23 in the domestic mobile communication network 20 and the mobile switching station 13 in the foreign mobile communication network 10 establishes a call path between the calling mobile terminal and the called mobile terminal. It is connected via (4) (S212).

It has been described so far limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be construed as naturally included in the technical spirit described in the claims of the present invention.

As described above, in the present invention, in providing an international roaming service, the originating mobile switching center generates a virtual ring back tone and provides it to the calling party, thereby providing a ring back tone without a silent period when making a call. Even if a call is made to a different called party's mobile switching center, the same ring back tone is always provided.

In addition, when the called party has subscribed to the call connection replacement tone service, it is possible to provide the calling party with a preset call connection substitute sound in place of the call connection tone.

Claims (13)

A system for providing an international roaming service when a subscriber of a first mobile communication network is located within a service area of a second mobile communication network after subscribing to an international roaming service. A second mobile switching center and a second mobile telephone gateway switch providing a mobile communication service in a service area of the second mobile communication network; When a mobile communication service is provided in a service area of the first mobile communication network, and a call connection attempt is attempted between an originating subscriber located in a service area of the first mobile communication network and a called party located in a service area of the second mobile communication network. A first mobile switching center and a first mobile telephone gateway switching center providing the calling subscriber with a virtual ring back tone or a ring back replacement tone to the calling subscriber; An international signaling network used to transmit a routing phone number between the first mobile communication network and the second mobile communication network; International telephone network for the communication path between the first mobile communication network and the second mobile communication network International roaming ring tone providing system comprising a. The method of claim 1, The first mobile communication network provides the call connection replacement sound when the called party is subscribed to the call connection replacement tone service, and the virtual service is provided when the called party subscriber is not subscribed to the call connection replacement tone service. Providing ring back tone to the calling subscriber International roaming ring tone providing system characterized in that. A method of providing an international roaming service when a subscriber of a first mobile communication network is located within a service area of a second mobile communication network after subscribing to an international roaming service, (a) requesting routing information from the first mobile communication network to the second mobile communication network through an international signal network when the calling subscriber in the first mobile communication network requests a call connection with the called subscriber in the second mobile communication network; Wow, (b) the second mobile communication network responding to the request for routing information and responding to the routing information via the international signaling network; (c) the first mobile communication network requesting a call connection to a called subscriber in the second mobile communication network through an international signaling network based on the received routing information; (d) providing, by the first mobile communication network, a virtual ring back tone or a call back replacement tone to the calling subscriber while requesting the call link; (e) connecting a call path between the calling subscriber and the called subscriber through the international telephone network when the called subscriber accepts the request for the call connection. International roaming ring tone providing method comprising a. The method of claim 3, wherein In the step (d), when the called subscriber is subscribed to the call connection replacement tone service, the call connection replacement tone is provided to the calling subscriber, and when the called subscriber is not subscribed to the call connection replacement tone service, Providing the virtual ring back tone to the calling subscriber International roaming ring tone providing method characterized in that. The mobile communication system of the first mobile communication network that provides a mobile communication service through an association with the second mobile communication network when the subscriber of the first mobile communication network is located in the service area of the second mobile communication network after joining the international roaming service. As A mobile communication terminal for providing a mobile communication service to a subscriber of the first mobile communication network; A base station performing a wireless access function with the mobile communication terminal; A base station controller for managing and controlling the base station; A mobile switching center having a switching function for providing the mobile communication service to a subscriber of the first mobile communication network; A home location register that manages current location information, status, and service related information about a subscriber of the first mobile communication network; A global location register that manages subscriber information to be provided with the international roaming service, and receives time-based location information of a subscriber located in a service area of the first mobile communication network from the second mobile communication network and transmits the location information to the home location register; Mobile telephone gateway exchange station responsible for relaying between the mobile switching center of the first mobile communication network and the mobile switching station of the second mobile communication network. Including; The mobile switching center or the mobile telephone gateway exchange of the first mobile communication network, When a subscriber of the first mobile communication network requests a call connection to a subscriber who is roaming internationally in the second mobile communication network, a virtual ring back tone to replace the ring back tone is generated and provided to the subscriber of the first mobile communication network. Mobile communication system. The method of claim 5, wherein The mobile switching center of the first mobile communication network or the mobile telephone gateway exchange discards the ring back tone provided from the second mobile communication network without providing the subscriber of the first mobile communication network. Mobile communication system, characterized in that. A method of providing a mobile communication service to a subscriber of the first mobile communication network through an association with the second mobile communication network when the subscriber of the first mobile communication network is located in the service area of the second mobile communication network after joining the international roaming service. As (a) when a subscriber of the first mobile communication network requests a call to a subscriber identification number that is roaming to the second mobile communication network, the mobile switching center requesting call location information from a home location register; (b) the home location register requesting routing information from a global location register at the request of the mobile switching center; (c) the global location register requesting routing information from the mobile switching center of the first mobile communication network through a mobile telephone gateway switch and an international signaling network; (d) when the routing information is answered from the mobile switching center of the second mobile communication network, the global location registrar responds to the home location registrar with the routing information; (e) the home location register, which has received the routing information, responds to the mobile switching center of the first mobile communication network with the called location information; (f) the mobile switching center of the first mobile communication network requesting a call connection to the mobile switching center of the second mobile communication network through the mobile telephone gateway and the international signaling network based on the called location information; (g) generating or providing a virtual ring back tone to the subscriber of the first mobile telecommunication network, wherein the mobile telephone gateway or mobile switching center of the first mobile telecommunication network replaces the ring back tone; (h) when a subscriber of the second mobile communication network requests a call connection for the call connection request, connecting a call path between the subscriber of the first mobile communication network and the subscriber who is roaming to the second mobile communication network; Mobile communication service method comprising a. The method of claim 7, wherein The mobile communication service method may be discarded even if a ring back tone is provided from the second mobile communication network according to the call connection request in step (f), and provide the virtual ring back tone. Mobile communication service method characterized in that. The method of claim 7, wherein In the mobile communication service method, when a call connection tone is provided from the second mobile communication network according to the call connection request in step (f), the call connection tone of the first mobile communication network is no longer provided. What you give to the subscriber Mobile communication service method characterized in that. The mobile communication system of the first mobile communication network that provides a mobile communication service through an association with the second mobile communication network when the subscriber of the first mobile communication network is located in the service area of the second mobile communication network after joining the international roaming service. As A mobile communication terminal for providing a mobile communication service to a subscriber of the first mobile communication network; A base station performing a wireless access function with the mobile communication terminal; A base station controller for managing and controlling the base station; A mobile switching center having a switching function for providing the mobile communication service to a subscriber of the first mobile communication network; A home location register that manages current location information, status, and service related information about a subscriber of the first mobile communication network; A global location register that manages subscriber information to be provided with the international roaming service, receives time-based location information of a subscriber located in a service area of the second mobile communication network from the second mobile communication network, and transmits the time-based location information to the home location register; A mobile telephone gateway exchange station responsible for relaying between the mobile switching center of the first mobile communication network and the mobile switching station of the second mobile communication network; A call replacement substitute device for providing a subscriber with the first mobile communication network with a call replacement substitute sound that replaces the call connection sound when a subscriber of the first mobile communication network requests an international roaming subscriber in the second mobile communication network. Mobile communication system comprising a. The method of claim 10, The mobile switching center of the first mobile communication network or the mobile telephone gateway exchange discards the ring back tone provided from the second mobile communication network without providing the subscriber of the first mobile communication network. Mobile communication system, characterized in that. A method of providing a mobile communication service to a subscriber of the second mobile communication network through an association with the second mobile communication network when the subscriber of the first mobile communication network is located in the service area of the second mobile communication network after joining the international roaming service. As (a) when a subscriber of the first mobile communication network requests a call to a subscriber identification number that is roaming to the second mobile communication network, the mobile switching center requesting call location information from a home location register; (b) the home location register requesting routing information from a global location register at the request of the mobile switching center; (c) the global location registrar requesting routing information from the mobile switching center of the second mobile communication network through the mobile telephone gateway and the international signaling network; (d) when the routing information is answered from the mobile switching center of the second mobile communication network, the global location registrar responds to the home location registrar with the routing information; (e) the home location register, which has received the routing information, responds to the mobile switching center of the first mobile communication network with the called location information; (f) the mobile switching center of the first mobile communication network requesting a call connection to the mobile switching center of the second mobile communication network through the mobile telephone gateway and the international signaling network based on the called location information; (g) requesting, by the mobile switching center of the second mobile communication network, a call connection replacement tone from the call connection replacement tone device based on the call connection replacement tone information included in the called location information received in step (e); , (h) providing, by the mobile telephone replacement tone device, a subscriber to the first mobile communication network at the request of the mobile switching center in the first mobile communication network; (i) connecting a call path between a subscriber of the first mobile communication network and a subscriber who is roaming to the second mobile communication network when the subscriber of the second mobile communication network requests a call connection for the call connection request; Mobile communication service method comprising a. The method of claim 12, The mobile communication service method is to discard the call connection tone provided from the second mobile communication network according to the call connection request in step (f) and provide the call connection replacement sound. Mobile communication service method characterized in that.

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