KR100782052B1 - International Roaming System and Method using SM Callback Server - Google Patents

Abstract

An international roaming system using an SMS(Short Message Service) callback server and a method are provided to enable a sender in a foreign country to make a call by sending an SMS message to a domestic receiver through the SMS callback server, thereby tremendously reducing communication charges. A message storage module(210) stores a short message and a telephone number of a sender MS(Mobile Station) in a DB(DataBase) by receiving a short message including a telephone number of a receiver MS from the sender MS. A number identify module(220) checks whether a telephone number of the receiver MS is included in the short message. A call origination module(230) transmits an originating call to the receiver MS whose number is included in the short message through a domestic network(110), and transmits an originating call to the sender MS through an international network(120). A call connection module(240) mutually connects both originating calls of the call origination module(230).

Description

International roaming system and method using sms callback server {INTERNATIONAL ROAMING SYSTEM THROUGH SMS CALL BACK SERVER AND METHOD USING THEREOF}

1 is a schematic block diagram of a conventional mobile communication system

2 is a block diagram illustrating a schematic roaming procedure using an international roaming system using an SMS callback server according to the present invention;

Figure 3 is a block diagram showing the configuration of an international roaming system using the SMS callback server according to the present invention.

4 is a flowchart illustrating a schematic procedure of an international roaming method using an SMS callback server according to the present invention.

5 is a flow chart illustrating a deposit processing procedure in a method according to the present invention.

6 is a flowchart illustrating a number identification step in the method according to the invention.

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

1: MSC 140: Caller MS

4: BTS 150: recipient MS

5: MS 200: SMS Callback Server

6: PSTN 210: message storage module

7: ACR 220: number identification module

100: system 230 of the present invention: call origination module

110: domestic network 240: call connection module

120: international network 250: deposit processing module

130: billing server 260: billing processing module

270: balance notification module

The present invention relates to an international roaming system and method using an SMS callback server. More specifically, when an overseas caller, a user of a mobile communication terminal, wishes to make a call in Korea, the number of the receiver is transmitted in an SMS form. The present invention relates to a royle system and method that can identify and call a recipient and connect outgoing and incoming calls to reduce call charges as well as to use semen.

Currently, a mobile communication system that is commercially available provides various data services such as voice and text / video messages (SMS to MMS) using a mobile communication terminal that can be connected in a wireless manner. This mobile communication system has the advantages of being easy to use and providing various conveniences compared to the wired network, and the population has exploded in a short period of time. Development continues.

1 is a schematic block diagram of a conventional mobile communication system.

Referring to FIG. 1, a conventional mobile communication system includes a mobile switching center 1 (hereinafter referred to as MSC), a base station transceiver subsystem (hereinafter referred to as BTS), and a base station controller. (Base Station Controller: hereinafter referred to as 'BSC') (2) and a mobile terminal (Mobile Station: hereinafter referred to as 'MS') (5).

The BTS 4 is responsible for establishing a communication call with the MS 5 using a predetermined protocol, and the BTS 4 transmits a radio frequency signal received from the MS 5 to the MSC 1 and the MSC. The signal received from (1) is sent to the MS (5).

In addition, the BSC 2 has a function of relaying communication between the BTS 4 and the MSC 1, and the MSC 1 determines whether it is an authenticated MS 5 and, in the case of an authenticated MS 5, Provide call service. In addition, the MSC 1 is connected to a public switched telephone network (hereinafter referred to as a 'PSTN') 6 to relay a call between the MS 5 and the PSTN 6.

The MSC 1 includes a terminal authentication device (EIR), a visitor location register (hereinafter referred to as 'VLR') 9a, and a home location register (hereinafter referred to as 'HLR') 9b. And a Message Center (hereinafter referred to as "MC") 8 are connected.

The VLR 9a manages the location of the visited subscription site and the subscriber's registration information, and the HLR 9b configures and manages the subscriber's basic information (including location information) and additional service information in a database. It provides a message service to the MS 5.

In addition, the Access Control Router (hereinafter referred to as 'ACR') 7 connected to the MSC 1 can access the Internet, manage and control IP routing and mobility, and manage IP multicasting and billing functions (prepaid). It is also known as a device that plays a role of paying a post-pay, a flat fee, etc. and recently selects a line automatically.

Currently, there are various operators operating such mobile communication systems, and a roaming service is provided to prevent duplication of resources and waste of resources between operators. Roaming service means that the MS subscribed to one mobile service provider can use the existing subscribed service using the mobile communication system of the other service provider.

In addition, automatic roaming service or international roaming service is a service that can be used between countries using the same frequency band, and means that a user can use his or her MS in another country without having to rent an MS separately. do.

However, when the MS user uses the roaming service abroad, there is a problem in that the MS user in the foreign country has a structure that cannot control the fee, resulting in a large burden due to the excessive fee.

In addition, the existing ACR has a method of plugging and attaching to the MS to recognize the other party's number in the MS and establishing a call connection with the other party through a call button. In this case, the ACR must be carried as a separate device. If you do not provide ACR service overseas, it can not be used.

Therefore, it is necessary to develop a roaming system that can drastically reduce the fee by improving the existing ACR, but provide a call connection method using SMS to further reduce the fee than the existing ACR.

The present invention has been made to overcome the above problems, by sending a text message to the other MS user (sender) of the foreign MS user (receiver) through the SMS callback server to improve the ACR, and connects the transmission and reception of both It is to provide a system and method that can make a call to dramatically reduce the call charges.

A further object of the present invention is to predict and prevent the possibility of a call failure due to a number error by going through the number authentication step of the receiver in the SMS callback server.

A further object of the present invention is to enable the use of deposits for call charges in advance or post-payment so that customers can only use quantitative currency usage predicted.

In order to achieve the above object, the international roaming system using the SMS callback server according to the present invention, in the international roaming system through the domestic network 110 and the international network 120, including the telephone number of the recipient MS 150 A message storage module 210 which receives the short message from the caller MS 140 and stores the phone number and the short message of the caller MS 140 in a database; A number identification module 220 for checking whether the short message includes the telephone number of the receiver MS 150; A call origination module 230 for transmitting an outgoing call to the recipient MS 150 in the short message through the domestic network 110 and transmitting the outgoing call to the originating MS 140 through the international network 120; SMS callback server 200 consisting of; further comprises a call connection module 240 for interconnecting both outgoing calls of the call origination module 230.

In addition, the international roaming method using the SMS callback server according to the present invention comprises the steps of: receiving a short message containing the phone number of the recipient from the caller and storing the caller's phone number and the short message; Identifying the telephone number of the recipient included in the short message; Sending a call through a domestic network to a corresponding telephone number of a receiver; Transmitting an outgoing call to a caller through an international network, interconnecting an outgoing call through an international network with an outgoing call through a domestic network; The caller receives the call to make a call with the receiver; characterized in that consisting of.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numerals in each of the drawings refer to like elements.

2 is a block diagram illustrating a schematic roaming procedure using the international roaming system 100 using the SMS callback server according to the present invention.

2, the system 100 and the method according to the present invention is a mobile phone user located abroad, that is, the caller MS 140 using a domestic and overseas network (110,120) roaming service function of the domestic mobile phone user, that is, the receiver When the MS 150 wants to make a call, it can be seen that the call is connected through the SMS callback server 200.

Here, the domestic network 110 and the international network 120 refers to a mobile communication network system that is commercially available in the country and abroad, including each module described in FIG. 1, the roaming service network is a domestic and international It refers to a network that performs roaming service using the network (110,120), it is a concept that is currently known and commercialized in conjunction with the domestic network (110) and international network (120).

In addition, the receiver MS 150 is not necessarily limited to a person having only a mobile communication terminal (MS), but it should be understood that it encompasses a general landline telephone subscriber, and therefore, the receiver is a mobile terminal holder and a general landline. The concept encompasses telephone subscribers.

2, the international roaming method using the SMS callback server according to the present invention is subjected to the following procedure.

① transmitting a short message including the phone number of the receiver MS 150 from the sender MS 140 to the SMS callback server 200 linked to the domestic network 110 through the international network 120;

② SMS callback server 200 identifies the phone number included in the short message sent by the sender and sends a call through the domestic network 110 to the phone number,

③ transmitting the outgoing call to the recipient MS 150 in the domestic network 110;

④ transmitting an outgoing call from the SMS callback server 200 to the caller MS 140 through the international network 120, and interconnecting the outgoing call through the domestic network 110,

⑤ The international network 120 consists of sending a call to the calling party MS 150 to make a call with the called party MS 150.

That is, the international roaming method using the SMS callback server according to the present invention does not connect a caller by directly pressing a call button to a receiver as in the conventional roaming method, but rather a specific telephone number (or mobile service provided by one-touch from MS) SMS callback server 200 that can connect to the SMS callback server 200 that can be connected to the recipient's phone number, that is, after a short time (for example, 2-4 seconds) required to connect to the recipient after sending a short message (for example, the SMS callback server 200). If the call is received at 200), the call is received and the call is made.

3 is a block diagram illustrating a configuration of an international roaming system 100 using an SMS callback server according to the present invention.

As can be seen from Figure 3, the system 100 according to the present invention is a domestic network 110 with a known domestic network 110 and international network 120, and a billing server 130 for the billing process ) And an SMS callback server 200 which mediates roaming services in a state connected between the international network 120 and the domestic network.

That is, the core of the present invention will be said that the configuration of the SMS callback server 200, the SMS callback server 200 according to the present invention is a message storage module 210, number identification module 220, call origination module 230, the call connection module 240, the deposit processing module 250, the billing processing module 260, the balance notification module 270.

The message storage module 210 stores a short message transmitted from the sender MS 140 to build an SMS database and simultaneously stores a phone number of the receiver MC 150. At the same time, the phone number of the caller MS 140 and the deposit information to be described later are stored.

The stored and built SMS database can later give various benefits (e.g., identify discounted customers and add discounts) when the customer uses the international roaming method according to the present invention again. Not only will it serve as a basis but it will also play a role in identifying customer information or identity for deposit processing.

The number identification module 220 performs the function of extracting and identifying the phone number of the other party, ie, the receiver MS 150, included in the text message when the sender MS 140 sends the text message to the SMS callback server 200. .

The international roaming method according to the present invention is not a method in which a caller connects to a receiver using a direct call button, but a text message is transmitted to an SMS callback server 200 by using a short message service (SMS). It is important to check whether the phone number of the recipient MC 150 is properly recorded. For example, if you enter a phone number that contains incorrect numbers, non-numeric characters, symbols, or mixed numbers, the system will check for these errors and provide notifications so that callers can see them immediately. It is necessary.

To this end, the number identification module 220 according to the present invention first checks whether the characters and symbols except for the numbers in the short text message, and if the characters and symbols are included in the remaining numbers in the input order is recognized Do it.

For example, if the caller wants to enter the number '011-222-3333' for the call with the recipient, but enters '011-A222-3333' incorrectly or enters '011F222 * 3333', the letters A, F and symbols Only numbers other than * are identified by input order. Therefore, even if a letter or symbol is accidentally included, it is possible to provide a characteristic that can recognize a number through the step of determining whether the number identification module 220 includes the letter or symbol according to the present invention. It has a property that can provide convenience to the user.

However, in the above example, if the input is made as 'FFF2223333', it is impossible to assert or predict that the FFF is replaced with 111.

After the step of including the letter and the symbol, the short text message includes a number consisting of ordinary telephone number digits, that is, the rated number of digits is checked.

For example, a regular phone consists of 9 to 11 digits, such as "Area code (2 or 3 digits in total)-XXX (or XXXX)-XXXX", and 01X-XXX (or XXXX) -XXXX for mobile phones. As it consists of 11 to 12 digits, first check whether the number of the 9 to 12 digits is included in the text message sent by the sender, and if not, the SMS callback server 200 by the number identification module 220. Call the sender at) to notify you that the number is incorrect or not recognized by an automatic voice message.

6 is a flowchart illustrating a number identification step in the international roaming method according to the present invention.

As can be seen with reference to Figure 6 and the above description, the number identification step according to the present invention first consists of the first number reading step to determine whether or not to include a character or symbol, and the second digit confirmation step to find an error text message It reads first and notifies sender MS 140 before sending an outgoing call to the domestic network, which reduces the waiting time and speeds up error checking of the caller. Since there is no need to make outgoing call transmission using the network 110, the advantage of not having a call connection charge due to the expensive domestic network is given.

Referring again to FIG. 3, the call origination module 230 according to the present invention includes the telephone number of the recipient MS 150 in the domestic network 110 after the number identification step by the number identification module 220. Simultaneously with the transmission of the outgoing call, the message storage module 110 has the function of transmitting the outgoing call to the phone number of the calling party MS 140. That is, the call origination module 220 makes a call connection by the domestic network 110 to the receiver MC 150 under the domestic network 110 and makes a call to the caller MC that has transmitted a text message at home and abroad. It is responsible for preprocessing functions for interconnecting outgoing calls sent to located callers and called parties.

The call connection module 240 performs a function of interconnecting an outgoing call transmitted by the call originating module 230 to the caller MS 140 and the receiver MS 150.

That is, the call connection module 240 serves to connect both of these two outgoing calls as an auto attendant, and by the function of the call connection module 240 the caller transmits a text message and the receiver After waiting for a minimum of approximately several seconds necessary for a call connection, the user can make a call with the receiver by receiving a call made by the SMS callback server 200.

Through this process, the sender pays the SMS call rate, the receiver connection fee through the domestic network 110 in the SMS callback server 200 and the caller connection fee through the international network 120 in the SMS callback server 200. The fee has a characteristic of saving more cost than the charge due to the direct call connection using the existing roving service.

The international roaming system 100 according to the present invention provides a method of processing a deposit so that a caller can set or predict a time for which a caller can make a call, such as a subscription or post-payment. Specifically, the deposit processing module according to the present invention ( 250) the caller checks the call connection amount, that is, a 'deposit' for the call connection amount previously deposited to the SMS callback server 200 operator by the caller's phone number, and sets a time during which the caller can make a call according to the deposit. .

For example, the deposit can be deposited to the operator in the form of a card in the form of a password that is currently being used in advance, and just before the caller calls the domestic recipient, to the telephone call unique to the SMS callback server 200 By dialing in and entering the password recorded on the card according to the guidance of the answering machine message, the deposit deposit and verification process for each caller's phone number can be performed.

The balance notification module 270 notifies the current balance or estimated use time through an automatic response message when the sender using the deposit method transmits a text message to the SMS callback server 200 and transmits a call to which the caller's calling call is connected again. In charge of function.

5 is a flowchart illustrating a deposit processing and balance notification procedure in an international roaming method according to the present invention.

Referring to FIG. 5, the SMS callback server 200 receiving the text message sent by the sender first checks whether there is a deposit of the sender, and asks in advance whether or not to perform postpaid processing if there is no deposit. If not, the roaming procedure may be terminated as shown in FIG. 6, or the roaming procedure may be continuously performed according to the cost processing method of a service provider (KTF, SK, etc.) involved in the domestic network, although not shown in the drawing. .

If a deposit exists, the balance check or estimated call time is notified as an automatic response message by the function of the balance notification module 270 when notifying the caller of the call to which the called party of the receiver is connected.

The billing processing module 260 according to the present invention performs a charge in the deposit in connection with the billing server 130 to establish a call charge and in conjunction with the deposit processing module 250 as performed in a known ACR. Since the billing processing method follows a known method, a detailed description of the function will be omitted.

4 is a flowchart illustrating a schematic procedure of an international roaming method using an SMS callback server according to the present invention.

Since the procedure of the roaming method according to the present invention shown in FIG. 4 is based on the description method mentioned in FIG. 2, the description thereof will not be repeated. However, the roaming method according to the present invention will be briefly described with reference to FIG. 4 as follows. .

First, the caller can optionally deposit a deposit or sign up with a specific international telephone operator (e.g., a domestic international telephone company, Dacom, etc.) (this is for post-pay billing to settle the bill after the call). The text message with the phone number input is transmitted to the SMS callback server 200. That is, the caller does not directly connect by entering the recipient's phone number, but the sender first sends a text message in which the recipient's phone number is entered to the SMS callback server 200, and the call comes from the SMS callback server 200. Wait for some time until

Thereafter, the SMS callback server 200 receives the text message, stores the caller's phone number and the text message, searches for an error number by the number identification step to be described, and if there is an error, sends it through the domestic network. Prior to sending a call, an error message is notified to the caller by an auto-reply message delivery method using a telephone connection method.

The SMS callback server 200 identifying the recipient's telephone number transmits the outgoing call to the recipient through the domestic network 110 and at the same time (or after the recipient authentication is performed by the MSC after the outgoing call is sent to the recipient). Send a call.

When sending an outgoing call to the caller in this way, it is desirable to send the call as a 'connected call' state after the caller's identification is established.

In this way, the caller receives the call from the SMS callback server 200 so that the caller can make a call with the desired receiver.

Thereafter, the call charging is set and the roaming method according to the present invention is terminated through the steps in which the charge is settled as a deposit or postpay.

According to the description of the method according to the present invention, only the caller located in a foreign country is set to connect a call to a domestic receiver, but if the SMS callback server 200 according to the present invention is also provided abroad, the reverse method That is, it may be possible for a domestic caller to charge a call to a foreign caller by sending a text message to a foreign caller.

As described so far, the international roaming system and method using the SMS callback server according to the present invention has been represented in the above description and drawings, but this is merely an example and the spirit of the present invention is not limited to the above description and the drawings. Various changes and modifications are possible without departing from the technical spirit of the present invention.

As described above, according to the international roaming system and method using the SMS callback server according to the present invention,

1) Because SMS callback server enables overseas callers to make calls by sending SMS to domestic recipients, it can drastically reduce call charges compared to conventional ACR methods that send and make direct call connections as well as existing roaming services. Has the advantage of

2) If you enter the other party's phone number incorrectly, you can save money by not using the domestic network unconditionally by going through the number input error step, while speeding up error checking and unconditionally waiting for the caller to be connected. Not only does it have the property to block state,

3) It is possible to limit or set the call rate by the caller, so that only the quantitative call usage predicted by the caller or the amount of money can be used.

Claims (6)

 In the international roaming system through domestic and international networks,  A message storage module for receiving a short message including a phone number of a receiver MS from a caller MS and storing a phone number and a short message of the caller MS as a database; A number identification module for checking whether the short message includes the telephone number of the receiver MS; A call origination module for transmitting an outgoing call to a recipient MS in a short message through a domestic network, and transmitting an outgoing call to a originator MS through an international network; A call connection module for interconnecting both outgoing calls of the call origination module; And an SMS callback server configured as an international roaming system using the SMS callback server. The method of claim 1, The SMS callback server, International roaming system using the SMS callback server, characterized in that further comprising; a deposit processing module for confirming the existence of the deposit pre-processed for the call by the caller through the phone number of the caller MS identified in the message storage module; . The method of claim 2, The SMS callback server, If the deposit is confirmed by the deposit processing module, the balance notification module for notifying the caller MS estimated time to the balance according to the deposit; further comprising a; roaming system using the SMS callback server.  International roaming method using SMS callback server, Receiving a short message including the recipient's phone number from the sender and storing the caller's phone number and the short message; Identifying the telephone number of the recipient included in the short message; Sending a call through a domestic network to a corresponding telephone number of a receiver; Transmitting an outgoing call to a caller through an international network, interconnecting an outgoing call through an international network with an outgoing call through a domestic network; The caller receives the call to make a call with the recipient; International roaming method using an SMS callback server, characterized in that consisting of. The method of claim 4, wherein Identifying the recipient's telephone number, Checking whether a short text message includes letters and symbols except for numbers and determining whether to include characters or symbols that recognize the remaining numbers in the input order except the letters and symbols if they are included; And, International rating roaming method using an SMS callback server, characterized in that it further comprises; step of checking the rated digits to determine whether the number consisting of the ordinary telephone number digits. The method of claim 4, wherein Receiving a deposit for the call in advance to the caller; Confirming the existence of a deposit through the caller's telephone number upon receiving the caller's SMS; And notifying the sender of the remaining balance and estimated call time, if the deposit exists. The method of claim 1, wherein the international roaming method using the SMS callback server is further included.

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