KR101646937B1 - System and method for roaming service using USIM, and service server - Google Patents

Abstract

The present invention relates to an international roaming service system and method using a USIM, and a service server thereof, and more particularly, to an international roaming service system and method using a USIM, which performs location registration of a mobile terminal for receiving an international roaming service, If the actual traffic distribution ratio value for the visited network is larger than the set ratio value, the PLMN list is extracted, and the first PLMN is calculated from the set rate value in the corresponding region to the actual traffic And the PLMN list is transmitted to the mobile terminal. According to the present invention, the PLMN list is selectively extracted and transmitted only when necessary, thereby providing an international roaming service It is possible to simplify the registration process of the city, By sending a PLMN list in consideration of the difference of the rate at which, it is possible to effectively operator-specific roaming traffic coordination.

Description

[0001] The present invention relates to an international roaming service system and method using a USIM, a service server using the USIM,

The present invention relates to an international roaming service method using a universal subscriber identity module (USIM). More particularly, the present invention relates to an international roaming service method using a USIM for transmitting a PLMN (Public Land Mobile Network) Roaming service system and method, and service server thereof.

In addition to a simple voice call function, a mobile communication terminal is equipped with a built-in camera or a memory so that functions of the multimedia terminal such as digital camera shooting and MP3 music file playback are expanded. The service of the communication terminal is not limited to the communication service for voice communication, and various additional services using the multimedia function newly added to the mobile communication terminal are being developed.

Meanwhile, international roaming service is provided by using such a mobile communication terminal. This is a service provided between countries using the same frequency band (for example, CDMA, WCDMA, etc.) The communication service can be provided in other countries by using the terminal and the telephone number to be used.

In the mobile communication terminal performing the international roaming service, the PLMN information to which the subscriber is subscribed and the PLMN information in which the communication terminal is last used are stored in the USIM, and when the mobile communication terminal is powered on, And extracts the PLMN information from the system information message. If the extracted PLMN information is not identical to the last used PLMN information, it recognizes the extracted PLMN information as international roaming, and then, using the extracted PLMN information, By performing the registration process for the base station, the international roaming service is provided.

In recent years, when a mobile communication service provider requests an international roaming service from a customer of a mobile communication service provider, a request for a technique for controlling roaming traffic of a corresponding mobile communication service customer in a country where roaming is requested This is called traffic steering.

However, in the conventional international roaming service, when a traffic steering technique roams to an overseas communication network, for example, a Global System for Mobile communication (GSM) network or a UMTS (Universal Mobile Telecommunications System) network, The communication terminal repeats the registration procedure using the currently received PLMN information and repeats the process of receiving the other PLMN information and performing the registration procedure when the base station registration is not allowed, There is a time delay in performing the procedure, which causes inconvenience to users using the international roaming service.

The present invention has been proposed in order to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a method and apparatus for changing and storing a newly set PLMN list information in a USIM of a roaming mobile terminal, A service system and method, and a service server thereof.

In order to accomplish the above object, a roaming service system using a USIM according to the present invention includes a gateway location register for performing location registration by receiving an international roaming request from a mobile terminal, and for transmitting subscriber information of the mobile terminal, The actual traffic distribution ratio value of the visited network to which the mobile terminal has requested the location registration is compared with the preset ratio value of the preset provider portion information and when the actual traffic distribution ratio value is larger than the set ratio value The PLMN list corresponding to the subscriber information is extracted and the first PLMN is set as a visited network having the largest difference value obtained by subtracting the actual traffic distribution ratio value from the set ratio value in the area where the mobile terminal requests the location registration, And an OTA (Over The Air) server for transmitting the received PLMN list to the mobile terminal.

In order to achieve the above object, a service server in a roaming service system using a USIM according to the present invention includes a gateway location register, a UCMS server and an OTA server, a server interface unit for transmitting and receiving data, ) Distribution rate value, provider portion information, and PLMN list, and a server interface unit for referring to the subscriber information of the mobile terminal for receiving the international roaming service received from the gateway location register, The actual traffic distribution ratio value of the visited network requesting registration is compared with the setting ratio value of the provider portion information for the visited network and the actual traffic distribution ratio value for the visited network is compared with the value , The PLMN (Public Land Mobile Network) list corresponding to the subscriber information is extracted To the OTA server through the server interface unit, and transmits the set PLMN list to the OTA server through the server interface unit. And a control unit.

In the service server in the roaming service system using the USIM of the present invention, the server storage further stores a roaming sub-table.

In the service server in the roaming service system using the USIM of the present invention, when it is confirmed that the subscriber identification number included in the subscriber information does not exist in the roaming sub-table, the server control unit sets the actual traffic distribution ratio value And a set ratio value for the visited network.

In the service server in the roaming service system using the USIM of the present invention, the server control unit confirms that the subscriber identification number exists in the roaming sub-table, confirms that the country code is the same group as the country code pre- The actual traffic distribution ratio value for the visited network is compared with the set ratio value for the visited network.

In the service server in the roaming service system using the USIM of the present invention, the server control unit confirms that the subscriber identification number exists in the roaming sub-table, confirms that the country code is the same group as the country code pre- And comparing the actual traffic distribution ratio value of the visited network with the setting ratio value of the visited network when the business code is confirmed to be the same as the business code previously stored in the roaming sub table.

In the service server in the roaming service system using the USIM of the present invention, the server control unit stores the received subscriber information and the set PLMN list in the roaming sub-table and stores the reflected roaming sub-table in the server storing unit .

In the service server in the roaming service system using the USIM of the present invention, the subscriber information includes a subscriber identification number, a country code, and a business code.

In the service server in the roaming service system using the USIM of the present invention, the provider portion information includes a plurality of country identification information of a foreign country, a plurality of business entity identification information providing an international roaming service in a foreign country, a setting ratio value and a setting ratio value And period information indicating a period of time.

In the service server in the roaming service system using the USIM of the present invention, the server control unit refers to the period information and compares the set ratio value applied at the time when the portable terminal requests the location registration and the actual traffic distribution ratio value .

The service server in the roaming service system using the USIM of the present invention further includes a server transmission / reception unit for data transmission / reception with the administrator terminal.

In the service server in the roaming service system using the USIM of the present invention, the server control unit receives and stores provider position information for a plurality of visited networks from the administrator terminal through the server transmission / reception unit.

In the service server in the roaming service system using the USIM of the present invention, the server control unit refers to the roaming sub table and transmits a delete message to the RPLMN when confirming that the stored RPLMN (Registered PLMN) exists in the mobile terminal .

In the service server in the roaming service system using the USIM of the present invention, the server control unit inquires the local time of the corresponding country where the portable terminal is located or transmits a delete message at a predetermined time when the portable terminal is powered on or off, .

According to another aspect of the present invention, there is provided a roaming service method using a USIM, wherein a service server receives a subscriber information of a mobile terminal for receiving an international roaming service from a gateway location register, Comparing the actual traffic distribution ratio value of the visited network requested by the mobile terminal with the location information and the set rate value of the provider's portion information with respect to the visited network, Extracting a PLMN (Public Land Mobile Network) list corresponding to subscriber information when the actual traffic distribution ratio value for the visited network is greater than the set percentage value for the visited network, extracting a first PLMN The difference value obtained by subtracting the actual traffic distribution ratio value from the set ratio value in the region where the mobile terminal requests the location registration It includes a transmission step of transmitting the PLMN list setting step, and service server is configured to set a visit to the largest network with the OTA server.

In the roaming service method using the USIM of the present invention, when the service server confirms that the subscriber identification number included in the subscriber information does not exist in the roaming sub-table, the comparison step calculates the actual traffic distribution ratio value And comparing the set ratio value with respect to the visited network.

In the roaming service method using the USIM of the present invention, in the comparison step, the service server confirms that the subscriber identification number exists in the roaming sub-table, confirms that the country code is the same group as the country code pre- The actual traffic distribution ratio value and the set ratio value are compared.

In the roaming service method using the USIM of the present invention, in the comparison step, the service server confirms that the subscriber identification number exists in the roaming sub-table, confirms that the country code is the same group as the country code pre- And comparing the actual traffic distribution ratio value with the set ratio value when it is confirmed that the business entity code included in the subscriber information is the same as the business entity code previously stored in the roaming sub table.

The roaming service method using the USIM of the present invention further includes a first storing step of reflecting the subscriber information received by the service server and the set PLMN list on the roaming sub table and storing the reflected roaming sub table after the setting step .

According to the present invention, location registration of a mobile terminal is performed according to an international roaming request from a mobile terminal, and a PLMN list corresponding to subscriber information is selectively extracted So that the registration procedure can be simplified when the international roaming service is provided.

In addition, the number of mobile terminals roaming in a plurality of countries in the country is recognized in real time, and the PLMN list is transmitted in consideration of the difference between the ratio of the allocated traffic of the provider and the ratio of the real- The allocation ratio can be kept constant.

In addition, it is possible to provide stable service to the nation of the foreign country roaming by inducing the use of the network of other carriers through the steering in case of a network failure of an overseas operator.

1 is a block diagram illustrating an international roaming service system using a USIM according to an embodiment of the present invention.
2 is a block diagram illustrating a structure of a TCP / IP interface protocol message for subscriber information transmitted from a gateway location register to a service server according to an embodiment of the present invention.
3 is a configuration diagram illustrating a PLMN list according to an embodiment of the present invention.
4 is a view illustrating a screen for setting provider's position information in a service server in a terminal according to an exemplary embodiment of the present invention.
FIG. 5 is a view illustrating a screen in which status information of an international roaming service according to an exemplary embodiment of the present invention is output.
6 is a configuration diagram illustrating a service server according to an embodiment of the present invention.
7 is a configuration diagram illustrating a roaming sub-table according to another embodiment of the present invention.
8 is a flowchart illustrating an international roaming service method using a USIM according to an embodiment of the present invention.
FIG. 9 is a flowchart specifically illustrating a traffic distribution method according to a provider in FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention. The same reference numerals are used for portions having similar functions and functions throughout the drawings.

It is to be appreciated that where one element is referred to herein as " transmitting " data or a signal to another element, it may directly transmit data or signals and may transmit data or signals through at least one other element it means.

1 is a block diagram illustrating an international roaming service system using a USIM according to an embodiment of the present invention.

1, an international roaming service system using a USIM according to the present invention includes a mobile terminal 11, a visited network 13, a home location register (HLR) 17, a gateway location register 19, A service server 20, a USIM Card Management System (UCMS) server 31 and an over the air (OTA) server 33. The administrator terminal 37 may further include an administrator terminal 37.

The portable terminal 11 includes a USIM and is a portable terminal capable of wireless mobile communication such as a mobile phone and a PDA (Personal Digital Assistants). In addition, the portable terminal 11 can be a general wireless terminal capable of uploading and downloading packets as well as voice calls.

The portable terminal 11 of the present embodiment transmits a request signal to a visited network 13 when receiving an international roaming service from abroad and includes a PLMN list from the visited network 13 When a message is received, it is forwarded to USIM. The USIM is a universal subscriber identity module that can store information of the user of the portable terminal 11 such as communication carrier information, user password, roaming information, telephone number of the portable terminal 11, And stores the PLMN list transmitted through the PLMN 13 in the internal memory.

The visited network 13 plays a role of ensuring the mobility of the portable terminal 11 and includes a base station, a base station controller and an exchange, and supports both synchronous and asynchronous types. In addition, the visited network 13 is not limited to the CDMA network, the GSM network other than the W-CDMA network, and the fourth generation, and may include a communication network of all mobile communication systems to be realized in the future.

Here, in the case of a synchronous wireless communication network, a base station that receives and transmits a wireless communication signal of the portable terminal 11 controls a base transceiver station (BTS) and a base station controller that performs communication with an exchange, In case of an asynchronous wireless communication network, a base station that receives and transmits a wireless communication signal of the mobile terminal 11 controls a node B and a node B, and a base station controller that performs communication with an exchange is an RNC (Radio Network Controller).

In addition, an exchange is a general mobile communication exchange and constitutes an access point for user traffic with another exchange. That is, the exchange performs call processing, basic and supplementary service processing, location registration procedure and handover procedure processing of the mobile terminal 11, interworking with other networks, and the like. The ASS (Access Switching subsystem), INS (Interconnection Network Subsystem) for centralized call processing function, Central Control Subsystem (CCS) for centralizing operation and maintenance, LRS Location Registration Subsystem).

The visiting network 13 of the present embodiment requests the location registration of the portable terminal 11 by the gateway location register 19 when receiving the overseas roaming request signal from the portable terminal 11, A short message service center (SMSC) (not shown)) to generate a short message including the corresponding PLMN list, and then transmits the short message To the portable terminal 11.

The home location register 17 stores the subscriber's terminal information, subscription information, and the like, receives location information, performs registration registration, registration deletion, location confirmation, and authentication functions. In addition, the home location register 17 may include a subscriber information management device that manages the subscriber's supplementary service information in the form of a database when implemented in a wired communication service. The home location register 17 for the mobile communication service and the subscriber information management device for the wired communication service function as a database for the subscriber's additional service information. The home location register 17 of the present embodiment receives the location registration message from the gateway location register 19 and transmits the corresponding International Subscriber Dialing (ISD) information to the gateway location register 19.

The gateway location register 19 includes a gateway location register (GLR), a roaming traffic direction (RTD), and the like. The gateway location register 19 is responsible for a call connection and various data transmission and reception for the international roaming service. And performs signaling conversion, MAP protocol conversion, subscriber identity and supplementary service mapping, and the like for providing an international roaming service with a foreign carrier communication network to be used. In this case, the RTD is a technique for restricting the registration of a business that is not affiliated with an operator. In case of roaming to a specific country, when there is a communication network registration request of an unaffiliated communication service provider other than a communication network of an affiliated communication service provider, It is possible to perform a function of disallowing registration of a communication network of a non-affiliated communication network until it is roamed to the communication network of the business operator.

In this case, the GLR of the gateway location register 19 uses a TCP / IP socket connection and operates as a server with the service server 20. The service server 20 operates as a client, and each TCP / It provides the port number required for IP socket connection.

The gateway location register 19 of the present embodiment transmits a location registration message to the home location register 17 when the location registration of the portable terminal 11 is requested from the visited network 13, (For example, IMSI / MSISDN pair) of the portable terminal 11 by receiving the International Subscriber Dialing (ISD) information transmitted from the portable terminal 11 and transmitting the subscriber information of the portable terminal 11 To the service server (20).

2 is a block diagram illustrating a TCP / IP interface protocol message structure for subscriber information transmitted from the gateway location register 19 to the service server 20 according to an exemplary embodiment of the present invention. Referring to FIG. 2, The subscriber information between the GLR of the gateway location register 19 and the service server 20 is composed of a message header and a message body.

The message header includes a 'message version ID' indicating a version of the currently used message format, 'Linked ID' as an unsigned integer variable, a control message such as connection, release, check, A message type, which is an unsigned integer variable for distinguishing service request and response messages, a service ID, an unsigned integer variable, a node for sending and receiving a message to distinguish a system providing a mobile communication service by function 'Context ID', which is an unsigned integer variable, is a number assigned to each message, 'Subsystem' for identifying a message, 'Operation Code' for identifying a type of a message, 'Prefix' 'Source ID' indicating the system transmitting the message, 'Time Stamp', an unsigned integer variable indicating the system time in seconds in which the message is called, Recorded and a "Message Length" of an unsigned integer type variable containing the length of the body region.

The message body includes a 'User ID' which is an identification number of a subscriber, 'CC' which is a country code of a corresponding area where a portable terminal 11 requests a location registration, VC ', which is a Vendor Code for a service provider operating the service provider 13, is provided as a VLR number or Serving GPRS Supporting Node (SGSN) number, 'UserID' may be provided as MSISDN (Mobile Station ISDN) information, but is not limited thereto.

In particular, 'message type' is used together with 'Operation Code' when a message is transmitted from the gateway location register 19 to the service server 20, and the service server 20 registers the subscriber's overseas roaming, And the 'Operation Code' is used to update the subscriber information in case of overseas roaming registration, overseas roaming deletion, and the like. Items of 'Linked ID', 'Service ID', 'Prefix' and 'NPA' may not be included in the message transmitted between the gateway location register 19 and the service server 20.

In addition, the gateway location register 19 performs a roaming function to another communication network by interworking with a signal roaming network, for example, a signaling transfer point (STP) for interworking communication services between a certain communication network and another communication network, It is possible to perform the call connection and the transmission / reception of various data during the incoming exchange period.

The service server 20 stores information on a provider portion for a plurality of overseas visited networks 13 and receives subscriber information of the portable terminal 11 transmitted from the gateway location register 19, A server for providing a service for comparing PLMN information stored in the USIM of the portable terminal 11 with the actual traffic distribution ratio value for the plurality of visited networks 13 and the provider portion information, .

The actual traffic distribution ratio value may be a value obtained by multiplying the number of all mobile terminals 11 that are roaming in a given area by the number of operators providing a roaming service within a specific area of a foreign country, 13 to the number of mobile terminals 11 that are provided with roaming service.

The provider potion information is information indicating a share allocated in advance to the roaming traffic to a plurality of operators operating the foreign network 13. At this time, the provider's position information includes the policy item 'Policy' for each policy, 'Country', which is an identification item for a plurality of countries overseas, 'Vendor', a vendor identification item for providing an international roaming service in the country, Quot; setting rate value ", which assigns traffic to the visited network 13 operated by the terminal, and " Term " At this time, although the region where the portable terminal 11 requests roaming is classified as a country in the foreign country, when the same operator operates the visiting network 13 between adjacent countries, the same PLMN list can be used, Groups can be grouped by country.

More specifically, when the service server 20 receives the subscriber information from the gateway location register 19, the service server 20 checks the subscriber information of the country where the mobile terminal 11 requests the location registration and the visited network 13, The actual traffic distribution ratio value for the visited network 13 requesting the location registration is compared with the setting ratio value for the visited network 13 included in the provider portion information. The service server 20 extracts the PLMN list corresponding to the subscriber information of the mobile terminal 11 when the actual traffic distribution ratio value for the visited network 13 is larger than the set ratio value for the visited network 13 And sets the first PLMN as the visited network 13 having the largest difference value obtained by subtracting the actual traffic distribution ratio value from the traffic setting ratio value in the country where the portable terminal 11 requests the location registration.

By setting the first PLMN, that is, the PLMN list, to the highest visited network 13 having the largest difference value obtained by subtracting the actual traffic distribution ratio value from the traffic setting ratio value in the country where the mobile terminal 11 requests the location registration, The mobile terminal 11 that has received the first PLMN performs the roaming using the first PLMN, so that the value of the traffic setting ratio for each provider in the corresponding country can be kept constant.

The PLMN list indicates a list of the visited network 13 in which the mobile terminal 11 can receive roaming services from abroad.

Referring to FIG. 3, the PLMN list includes a PLMN list group identification item 'GroupID' that matches a plurality of countries or country groups, and a group ID PLMN_NUM 'of the registered PLMN list,' MCC (Mobile Country Code) of the first PLMN + PLMNXXX '(Mobile Network Code) and' ATI (Access Technology Identifier) of the first PLMN ' Quot; PLMNXXXATI ". That is, the service server 20 stores the items 'PLMNXXX' and 'PLMNXXXATI' in the PLMN list as the difference value obtained by subtracting the actual traffic distribution ratio value from the traffic setting ratio value within the country where the mobile terminal 11 requests location registration The information about the large visited network 13 is changed and set.

Thereafter, the service server 20 transmits the newly set PLMN list to the OTA server 33. [ At this time, the service server 20 formats the data in APDU (Application Protocol Data Unit) format for data communication with the USIM module, and transmits the data to the OTA server 33. Also, when formatting the data, the UCMS server 31 can inquire the card key of the USIM card, and can perform the data format using the SP (Security Policy) method.

The UCMS server 31 stores USIM profile information such as International Mobile Subscriber Identification (IMSI) of the subscriber and identification information of a terminal such as MSISDN (Mobile Station International ISDN Number), and transmits the USIM profile to the service server 20 And performs synchronization function.

The OTA server 33 performs an SMS format to transmit the list of PLMNs received from the service server 20 to the mobile terminal 11 through the SMS method and then visits the FSM (Foward SMS message) message including the PLMN list To the network (13).

Then, the mobile terminal 11 receiving the PLMN list from the OTA server 33 through the visited network 13 extracts the PLMN information from the system information message acquired from the base station of the adjacent cell, and outputs the extracted PLMN information to the PLMN If it matches the list, the registration process for the base station of the corresponding cell is performed. At this time, whether or not the extracted PLMN information matches the PLMN list is determined according to the priority determined by the service server 20.

Meanwhile, when the mobile terminal 11 attempts to register the location at a later time, such as when the power is turned on again, the mobile terminal 11 can perform the location registration process according to the priority of the received PLMN list. When the PLMN list is received, The connection to the visited network 13 may be blocked and the location registration process may be performed again.

The administrator terminal 37 is a computer capable of transmitting and receiving data with the service server 20 using a network (not shown), a notebook computer, a workstation, a PDA (personal digital assistant), a portable multimedia player (PMP) player, a mobile communication terminal, and the like. At this time, the intermediary network connecting the service server 20 and the administrator terminal 37 may be a virtual private network (VPN), the Internet, an intranet, an extranet, or other widely known or later developed wired, Lt; / RTI > network.

The administrator terminal 37 of this embodiment transmits and sets the service provider information on the plurality of overseas visited networks 13 providing the international roaming service to the service server 20 and sets the status information of the international roaming service to the service server 20. [ (20) and output it.

4 is a diagram illustrating a screen for setting provider position information in the service server 20 in the administrator terminal 37 according to an exemplary embodiment of the present invention. Referring to FIG. 4, 'Policy', 'Country', 'Vendor', 'Setting ratio value', and 'Term' can be input as items of the potion information. In this case, if the 'Default' item is checked, the 'Term' item can not be input. If the specific policy is not set when the mobile terminal 11 requests the roaming, Value. Also, if the set rate value of the visited network 13 is input as 0, the visited network 13 of the corresponding provider is registered as FPLMN (Forbidden PLMN).

Since the international roaming service manager can modify the registered service provider information, the policy is already activated and applied to the international roaming service within the period in which the policy is applied, It is possible to set the policy so that it can not be modified, and also the warning message may be output so that the international roaming service manager can recognize the policy.

In addition, for each policy, it is possible to update the PLMN list previously stored in the USIM of the portable terminal 11 or to download the FPLMN when transmitting the PLMN list to the portable terminal 11.

The status information of the international roaming service is information indicating the status of a plurality of portable terminals 11 receiving international roaming service from abroad.

5 is a view illustrating an example of a screen displaying status information of the international roaming service according to an exemplary embodiment of the present invention. Referring to FIG. 5, the screen displaying the status information of the international roaming service includes: 'Active' which is the item indicating the current policy applied to each country, 'Total' which indicates the number of mobile terminals 11 currently roaming in each country, and 'International' "Portion", which is an item indicating a setting ratio value assigned to each provider, and "Portion", which is an item indicating the number of mobile terminals 11 roaming through the visited network 13 'Count', 'Actual' which is the item indicating the actual traffic distribution ratio value for each business entity, and 'Deviation' which indicates the difference between the actual traffic distribution ratio value and the setting ratio value for each business can do. At this time, 'Try', which is an item indicating a cumulative count value not shown, but also a request for roaming for each service provider, indicates a cumulative count value when the mobile terminal 11 receives a roaming service from the roaming service provider's visited network 13 FA ', which is an item indicating an accumulated count value for which the roaming service is not provided to the visited network 13 of the provider of which the portable terminal 11 has requested roaming, as an item' SC '.

6 is a configuration diagram illustrating a service server according to an embodiment of the present invention. 1 to 6, the service server 20 of the present embodiment includes a server interface unit 21, a server storage unit 23, and a server control unit 25. At this time, the server transmission unit 27 ).

The server interface unit 21 has an interface for performing data transmission / reception with the gateway location register 19, the UCMS server 31 and the OTA server 33. Specifically, the server interface unit 21 receives the subscriber information from the gateway location register 19, synchronizes the USIM card profile of the portable terminal 11 with the UCMS server 31, inquires the USIM card key, And an interface for transmitting the PLMN list to the OTA server 33.

The server storage unit 23 stores the actual traffic distribution ratio value for the plurality of visited networks 13 in which the portable terminal 11 is provided with the international roaming service, And a PLMN list, and may further store the roaming sub-table at this time.

The server transmission / reception unit 27 has an interface for performing data transmission / reception with the administrator terminal 37 via a network (not shown). Specifically, the server transmission / reception unit 27 receives the provider position information from the administrator terminal 37 and has an interface for transmitting the status information of the international roaming service.

The server control unit 25 controls the operations of the server interface unit 21, the server storage unit 23, and the server transmission / reception unit 27 as a whole.

The server control unit 25 of the present embodiment receives from the gateway location register 19 via the server interface unit 21 a subscriber of the portable terminal 11 when the portable terminal 11 requests the location registration to receive the roaming service from abroad, The mobile terminal 11 refers to the country code (CC) and the business entity code (VC) included in the subscriber information to determine from which country the mobile terminal 11 requests the location registration through the visited network 13.

The server control unit 25 stores the setting ratio value preset and stored in the server storage unit 23 of the visited network 13 requesting the location registration of the portable terminal 11 and the actual ratio The traffic distribution ratio value is extracted and the size is compared.

At this time, if a specific period to which the setting ratio value for the visited network 13 is applied is set, the server control unit 25 sets the setting ratio value applied at the time when the portable terminal 11 requests the location registration, The size of the traffic distribution ratio value can be compared.

If the server control unit 25 determines that the actual traffic ratio value for the visited network 13 is larger than the set ratio value, The actual traffic ratio value for the plurality of visited networks 13 is confirmed.

The server control unit 25 searches for a group corresponding to the country code (CC) included in the received subscriber information, extracts a PLMN list of the group, and transmits the first PLMN of the PLMN list to a plurality of visited networks 13 To the visited network 13 having the largest difference value obtained by subtracting the actual traffic distribution ratio value from the set ratio value.

Specifically, the server control unit 25 sets the items 'PLMNXXX' and 'PLMNXXXATI' in the PLMN list shown in FIG. 3 as the traffic setting ratio value of the visited network 13 in the country in which the portable terminal 11 requests the location registration The information on the visited network 13 having the largest difference value minus the actual traffic distribution ratio value can be set.

For example, referring to FIG. 5, when the portable terminal 11 requests the location registration through the visiting network 13 of the f provider in the country B, the actual distribution ratio value 63% , The service server 20 confirms the setting ratio value and the actual distribution ratio value allocated to each business operator (d, e, f) in the country B and obtains the difference value obtained by subtracting the actual distribution ratio value from the setting ratio value (13) operated by the largest b operator (2%) is set as the first PLMN.

The server control unit 25 transmits the newly set PLMN list to the OTA server 33. [ At this time, the service server 20 formats the data in the APDU format for data communication with the USIM module, and transmits the data to the OTA server 33. Also, when formatting the data, the UCMS server 31 can inquire the card key of the USIM card, and can perform the data format using the SP (Security Policy) method.

The server control unit 25 extracts the roaming sub table stored in the server storage unit 23 and stores the received roaming sub table in the server storage unit 23 when the subscriber information is received from the gateway location register 19 through the server interface unit 21 It is possible to confirm whether the subscriber identification number included in the subscriber information exists in the roaming sub-table.

The roaming sub-table is a table in which information about the mobile terminal 11 in which the service server 20 is roaming is stored.

Referring to FIG. 7, the roaming sub-table includes a 'UserID', a subscriber identification number used as an index, a subscriber identification number ' 'UpdateTime', which is the time at which the subscriber identification number last transmitted the overseas location registration, 'GroupID', which is the PLMN list group ID, a country code indicating the country or country group in which the current subscriber is roaming, (VC), which is a Vendor Code indicating a visited network 13 in which a current subscriber is roaming, and a current PLMN (Visited PLMN) or an HPLMN (Home PLMN) And the data type may be input as OCTETS (byte data), DATE (time data), INT (integer data), and so on. At this time, 'CC' or 'VC' is provided as a VLR number or SGSN (Serving GPRS Supporting Node) number, and 'UserID' may be provided as MSISDN (Mobile Station ISDN) information, but is not limited thereto.

If the subscriber identification number does not exist in the roaming sub-table, the server control unit 25 compares the setting ratio value for the visited network 13 requesting the location registration of the portable terminal 11 with the value of the setting ratio for the visited network 13 The mobile terminal 11 compares the size of the actual traffic distribution ratio value with respect to the visited network 13 and confirms that the actual traffic ratio value for the visited network 13 is larger than the set ratio value, And extracts a PLMN list corresponding to the group. The visiting network 13 having the largest difference from the PLMN list minus the actual traffic distribution ratio value, To the first PLMN.

Also, the server control unit 25 generates a roaming sub-table, stores 'CreateTime', 'Update Time', 'Roaming Flag', 'GroupID' and 'CC' in the received subscriber information, And the 'VC' information can be stored.

At this time, if it is confirmed that the actual traffic ratio value for the visited network 13 is less than or equal to the set ratio value, the server control unit 25 generates a roaming sub-table, and reflects the received subscriber information, 'Update Time', 'RoamingFlag', 'GroupID', 'CC' and 'VC' information.

On the other hand, when the subscriber identification number exists in the roaming sub-table, the server control unit 25 determines whether the country code (CC) included in the subscriber information is the same group as the country code (CC) You can check whether the country is using the list.

If the country code (CC) included in the subscriber information is a group that is not the same as the country code (CC) stored in advance in the roaming sub-table, the server control unit 25 determines whether the group corresponding to the country code The PLMN list corresponding to the group can be searched and the first PLMN having the largest difference value obtained by subtracting the actual traffic distribution ratio value from the set percentage value of the PLMN list can be set as the first PLMN.

In addition, the server control unit 25 updates the 'Update Time', 'Roaming Flag', 'Group ID' and 'CC' information by reflecting the subscriber information in the roaming sub-table, and reflects the set PLMN list, You can update it.

On the other hand, when the country code (CC) included in the subscriber information is the same group as the country code (CC) stored in advance in the roaming sub-table, the server control unit (25) (VC) that is stored in advance.

The server control unit 25 searches the group corresponding to the country code CC included in the subscriber information when the business entity code VC included in the subscriber information is not the same as the business entity code VC previously stored in the roaming sub table The PLMN list corresponding to the group can be extracted and the visited network 13 having the largest difference value obtained by subtracting the actual traffic distribution ratio value from the set percentage value of the PLMN list can be set as the first PLMN.

Also, the server control unit 25 may update 'Update Time' and 'RoamingFlag' information by reflecting the subscriber information in the roaming sub-table, and may update 'VC' information by reflecting the set PLMN list.

On the other hand, when the provider code (VC) included in the subscriber information is the same as the provider code (VC) pre-stored in the roaming sub-table, the server control unit (25) And the actual traffic distribution ratio value for the visited network 13 can be extracted and the size can be compared.

At this time, if it is confirmed that the actual traffic ratio value for the visited network 13 is larger than the set ratio value, the server control unit 25 searches for a group corresponding to the country code (CC) included in the subscriber information, It is possible to extract the corresponding PLMN list and set the first PLMN as the visited network 13 having the largest difference value obtained by subtracting the actual traffic distribution ratio value from the set percentage value of the PLMN list.

Also, the server control unit 25 may update 'Update Time' and 'RoamingFlag' information by reflecting the subscriber information in the roaming sub-table, and may update 'VC' information by reflecting the set PLMN list.

On the other hand, when the server control unit 25 confirms that the actual traffic ratio value for the visited network 13 is less than or equal to the set ratio value, the server control unit 25 reflects the subscriber information in the roaming sub-table and outputs 'Update Time' and 'Roaming Flag' You can update it.

On the other hand, the server control unit 25 refers to the roaming sub table, and when the portable terminal 11 confirms that there is a registered PLMN (RPLMN) in the portable terminal 11 because the company code storing the location registration is stored, The mobile terminal 11 may transmit a delete message for deleting the RPLMN.

Thereafter, the server control unit 25 transmits the newly set PLMN list to the OTA server 33. At this time, the server control unit 25 may transmit the deletion message for deleting the RPLMN in the portable terminal 11 while transmitting the PLMN list. When the portable terminal 11 is powered on or off, that is, The mobile terminal 11 may inquire the local time of the corresponding country in which the mobile terminal 11 is located and transmit the deletion message at a preset time, for example, at night time.

8 is a flowchart illustrating an international roaming service method using a USIM according to an embodiment of the present invention. FIG. 9 is a flowchart specifically illustrating a traffic distribution method according to a provider in FIG. Referring to FIGS. 1, 8 and 9, the visiting network 13 receives an overseas roaming request signal from a portable terminal 11 to receive an international roaming service from abroad (S41) In response to the overseas roaming request, the gateway location register 19 requests the location registration of the mobile terminal 11 (S43).

In step S43, the gateway location register 19, which is requested to register the location of the mobile terminal 11, transmits the location registration message to the home location register 17, and thus the ISD information transmitted from the home location register 17 And manages the subscriber information of the mobile terminal 11 (S45).

In step S45, the gateway location register 19 that has performed the location registration in association with the home location register 17 transmits the subscriber information of the portable terminal 11 registered in the overseas location to the service server 20 (S47 ).

In step S47, the service server 20 having received the subscriber information distributes overseas roaming traffic for each provider (S49).

Specifically, referring to FIG. 9, the service server 20 extracts a roaming sub-table stored therein (S491), and checks whether the subscriber identification number included in the received subscriber information exists in the roaming sub-table (S493 ).

If it is confirmed in step S493 that the subscriber identification number exists in the roaming sub-table, the service server 20 determines whether the country code (CC) included in the subscriber information is the same as the country code (CC) That is, whether it is a country that uses the same PLMN list (S495).

If it is determined in step S495 that the country code (CC) included in the subscriber information is the same group as the country code (CC) stored in advance in the roaming sub-table, the service server 20 stores the subscriber information (VC) stored in the roaming sub-table (S497).

If it is confirmed in step S493 that the subscriber identification number does not exist in the roaming sub table or if the business entity code VC included in the subscriber information is identical to the business entity code VC previously stored in the roaming sub table in step S497 The service server 20 extracts the set ratio value for the visited network 13 from which the portable terminal 11 requests the location registration and the actual traffic distribution ratio value for the visited network 13 to calculate the size (S499).

At this time, if the specific period in which the setting ratio value for the visited network 13 is applied is set, the service server 20 sets the setting ratio value applied at the time when the portable terminal 11 requests the location registration, The size of the traffic distribution ratio value can be compared.

If it is determined in step S495 that the country code (CC) included in the subscriber information is a group that is not the same as the country code (CC) stored in advance in the roaming sub table, or if it is determined in step S497 that the business entity code Is not the same as the provider code (VC) pre-stored in the roaming sub-table or when the actual traffic ratio value for the visited network 13 to which the portable terminal 11 requested to register the location in step S499 is smaller than the set ratio The service server 20 extracts the PLMN list of the group corresponding to the country code (CC) included in the country where the portable terminal 11 requests the location registration, that is, the subscriber information, The visited network 13 having the largest difference value obtained by subtracting the actual traffic distribution ratio value from the set ratio value is set as the first PLMN (S501).

Subsequently, the service server 20 reflects the received subscriber information or the newly set PLMN list in the roaming sub-table and stores it (S503).

In the case where the service server 20 updates the roaming sub table, the subscriber identification number does not exist in the roaming sub table in step S493. In step S499, the mobile terminal 11 performs location registration If the actual traffic ratio value for the requested visited network 13 is less than or equal to the set ratio value, the service server 20 generates a roaming sub-table, generates' CreateTime ',' Update Time ',' RoamingFlag '' GroupID ',' CC 'and' VC 'information.

If the subscriber identity number does not exist in the roaming sub table in step S493 and the actual traffic ratio value for the visited network 13 for which the mobile terminal 11 requested the location registration in step S499 is smaller than the set ratio value The service server 20 generates a roaming sub table and stores 'CreateTime', 'Update Time', 'Roaming Flag', 'GroupID', and 'CC' in the received subscriber information, Quot; VC " information.

In step S493, the subscriber identification number is present in the roaming sub-table. In step S495, the country code CC included in the subscriber information is the same group as the country code CC of the roaming sub table. In step S497, the business entity code VC included in the subscriber information is the same as the business entity code VC of the roaming sub table. In step S499, the mobile terminal 11 transmits, to the visited network 13, When it is confirmed that the traffic rate value is less than or equal to the set rate value, the service server 20 may update the 'Update Time' and 'RoamingFlag' by reflecting the subscriber information in the roaming sub-table.

If the country code (CC) included in the subscriber information is not the same group as the country code (CC) of the roaming sub table in step S495, 'Update Time', 'Roaming Flag' ',' GroupID 'and' CC 'information, and update the' VC 'information by reflecting the set PLMN list.

In step S497, if the business entity code VC included in the subscriber information is not the same as the business entity code VC of the roaming sub table, the subscriber information is reflected in the roaming sub-table, and 'Update Time', 'Roaming Flag' Information, and update the 'VC' information by reflecting the set PLMN list.

In step S49, the service server 20 distributes the foreign roaming traffic for each carrier to the UCMS server 31, requests the profile of the USIM card installed in the portable terminal 11, receives the profile from the UCMS server 31, The profile is synchronized (S51).

In step S51, the service server 20 synchronizing the UIMMS profile with the UIMMS profile transmits the newly set PLMN list to the OTA server 33 (S53).

At this time, the service server 20 formats the data in the APDU format for data communication with the USIM module, and transmits the data to the OTA server 33. Also, when formatting the data, the UCMS server 31 can inquire the card key of the USIM card and perform the data format using the SP (Security Policy) method.

On the other hand, when the service server 20 refers to the roaming sub table and confirms that the provider code storing the location registration of the portable terminal 11 is stored and the RPLMN is present in the portable terminal 11, Lt; RTI ID = 0.0 > RPLMN. ≪ / RTI > At this time, the service server 20 may transmit a deletion message for deleting the RPLMN in the portable terminal 11 while transmitting the PLMN list. When the portable terminal 11 is powered on or off, that is, The mobile terminal 11 may inquire the local time of the corresponding country where the portable terminal 11 is located and transmit the deletion message at a preset time.

The OTA server 33 that has received the PLMN list in step S53 performs the SMS format in order to transmit the received PLMN list to the mobile terminal 11 by SMS method and then transmits the FSM (FowardSM) including the PLMN list, Message to the visited network 13 through the gateway location register 19 (S55).

In step S55, the visited network 13, which has received the FSM message, generates a short message including the corresponding PLMN list information in cooperation with a short message service center (SMSC, not shown) (Step S57).

The portable terminal 11 transfers the PLMN list included in the received short message to the USIM card installed therein (S59), and the USIM card stores the PLMN list in the internal memory (S61).

Then, the mobile terminal 11 receiving the PLMN list from the OTA server 33 through the visited network 13 extracts the PLMN information from the system information message acquired from the base station of the adjacent cell, and outputs the extracted PLMN information to the PLMN If it matches the list, the registration process for the base station of the corresponding cell is performed. At this time, whether or not the extracted PLMN information matches the PLMN list is determined according to the priority determined by the service server 20.

Meanwhile, when the mobile terminal 11 attempts to register the location at a later time, such as when the power is turned on again, the mobile terminal 11 can perform the location registration process according to the priority of the received PLMN list. When the PLMN list is received, The connection to the visited network 13 may be blocked and the location registration process may be performed again.

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, but, on the contrary, It will be appreciated by those skilled in the art that numerous changes and modifications can be made to the invention. And all such modifications and changes as fall within the scope of the present invention are therefore to be regarded as being within the scope of the present invention.

According to the present invention, a separate apparatus is not required in a conventional roaming service providing system to control traffic between a plurality of overseas companies providing international roaming services, thereby minimizing the additional cost incurred. In particular, considering the trend of increasing number of users moving abroad, the international roaming service scheme using the USIM of the present invention will not be utilized in a small degree.

11: portable terminal 13: visited network
17: home location register 19: gateway location register
20: service server 21: server interface part
23: server storage unit 25: server control unit
27: Server Transmitter / Receiver 31: UCMS Server
33: OTA server 37: administrator terminal

Claims (19)

delete A server interface unit for transmitting and receiving data to and from the gateway location register, the UCMS server and the OTA server;
A server storage unit for storing an actual traffic distribution ratio value, a provider portion information, and a PLMN list for a plurality of visited networks;
The server interface unit refers to the subscriber information of the mobile terminal for receiving the international roaming service received from the gateway location register and stores the actual traffic distribution ratio value of the visited network requested by the mobile terminal in the location registration request, And if the actual traffic distribution ratio value for the visited network is larger than the set ratio value for the corresponding visited network, the PLMN corresponding to the subscriber information (Public Land Mobile Network) list and sets the first PLMN as a visited network having a largest difference value obtained by subtracting the actual traffic distribution ratio value from the preset ratio value in an area where the mobile terminal requests location registration, A server control unit for transmitting the list to the OTA server through the server interface unit;
The service server comprising: 3. The method of claim 2,
Wherein the server storage further stores a roaming sub-table. The method of claim 3,
Wherein the server control unit compares an actual traffic distribution ratio value for the visited network with a setting ratio value for the visited network when the subscriber identification number included in the subscriber information is not present in the roaming sub table And the service server. The method of claim 3,
The server control unit confirms that the subscriber identification number exists in the roaming sub table, and when it is confirmed that the country code is the same group as the country code pre-stored in the roaming sub table, the server control unit sets the actual traffic distribution ratio value And a setting ratio value for the corresponding visited network. The method of claim 3,
Wherein the server control unit confirms that the subscriber identification number exists in the roaming sub table, confirms that the country code is the same group as the country code pre-stored in the roaming sub table, and the server code included in the subscriber information is roaming And comparing the actual traffic distribution ratio value for the corresponding visited network with the set ratio value for the corresponding visited network when it is confirmed that the same is stored in the sub-table. The method of claim 3,
Wherein the server control unit reflects the received subscriber information and the set PLMN list on the roaming sub table and stores the reflected roaming sub table in the server storage unit. 3. The method of claim 2,
Wherein the subscriber information includes a subscriber identification number, a country code, and a business code. 3. The method of claim 2,
Wherein the provider portion information includes a plurality of country identification information of a plurality of countries, a plurality of business entity identification information providing an international roaming service in a foreign country, the setting ratio value, and the period information to which the setting ratio value is applied. 10. The method of claim 9,
Wherein the server control unit refers to the period information and compares the set ratio value applied at a time when the portable terminal requests location registration to the actual traffic distribution ratio value. 3. The method of claim 2,
And a server transmission / reception unit for data transmission / reception with an administrator terminal. 12. The method of claim 11,
Wherein the server control unit receives and stores provider position information for the plurality of visited networks from the administrator terminal through the server transmission / reception unit. The method of claim 3,
The server control unit transmits the deletion message for the RPLMN to the OTA server through the server interface unit when it is confirmed that the RPLMN (registered PLMN) stored in the mobile terminal exists by referring to the roaming sub table Service server. 14. The method of claim 13,
Wherein the server control unit inquires the local time of the corresponding country in which the portable terminal is located when the power of the portable terminal is turned on or off or transmits the delete message at a predetermined time. The service server receiving subscriber information of a mobile terminal for receiving an international roaming service from a gateway location register;
The service server refers to the received subscriber information and compares the actual traffic distribution ratio value of the visited network with which the mobile terminal has requested the location registration to the set ratio value of the provider portion information for the visited network step;
The service server extracts a list of Public Land Mobile Network (PLMN) corresponding to the subscriber information when the actual traffic distribution ratio value for the visited network is greater than the set ratio value for the visited network Extraction step;
Setting a first PLMN of the extracted PLMN list as a visited network having a largest difference value obtained by subtracting the actual traffic distribution ratio value from the preset ratio value in an area where the portable terminal requests location registration;
A transmission step of the service server transmitting the set PLMN list to an OTA server;
(UIM) using a Universal Subscriber Identity Module (USIM). 16. The method of claim 15,
When the service server confirms that the subscriber identification number included in the subscriber information does not exist in the roaming sub table, the service server compares the actual traffic distribution ratio value for the corresponding visited network with the set ratio value for the visited network The method comprising the steps of: 16. The method of claim 15,
The service server confirms that the subscriber identification number exists in the roaming sub table, and when the service server confirms that the country code is the same group as the country code pre-stored in the roaming sub table, And comparing the received service information with the service information. 16. The method of claim 15,
The service server confirms that the subscriber identification number exists in the roaming sub table, confirms that the country code is the same group as the country code pre-stored in the roaming sub table, And comparing the actual traffic distribution ratio value with the set ratio value when it is confirmed that the same is the same as the commercial code stored in the table. 16. The method according to claim 15, wherein, after the setting step,
A first storage step of the service server reflecting the received subscriber information and the set PLMN list on a roaming sub table and storing the reflected roaming sub table;
The method of claim 1, further comprising:

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