KR20040042494A - Roaming Service System and Method from Synchronous Network to Asynchronous Network of IMT-2000 using Termination Control System - Google Patents

Abstract

PURPOSE: A termination data roaming service system from a CDMA2000(Code Division Multiple Access 2000) network to a WCDMA(Wideband CDMA) network using a TCS(Termination Control System) and a method therefor are provided to roam termination data from the synchronous CDMA2000 network to the asynchronous WCDMA network. CONSTITUTION: A DHLR(Dual Home Location Register)(240) manages respective subscriber information of a CDMA2000 network(100) and a WCDMA network(200). A TCS(270) processes calls terminated to a mobile terminal which roams from the CDMA2000 network(100) to the WCDMA network(200), and manages termination information. An SIP(Session Initiation Protocol) server(250) receives a termination message from the TCS(270) which can be applied to both synchronous and asynchronous networks, and provides the received termination message to the mobile terminal. The first database manages a mapping table as to subscriber information of the synchronous network, The second database manages a mapping table as to subscriber information of the asynchronous network, and the third database manages user IDs of subscribers.

Description

Roaming Service System and Method from Synchronous Network to Asynchronous Network of IMT-2000 using Termination Control System}

The present invention relates to an incoming data roaming service system and method from a synchronous network to an asynchronous network of an IMT-2000 using a terminating control system.

Currently, mobile communication service technology can be broadly classified into asynchronous service environment centering on Europe and synchronous service centering on North America. In addition, the IMT-2000 service is evolving around North America and Europe as a new mobile communication technology standard for delivering packets at high speed.

Synchronous IMT-2000 service is evolving into CDMA2000 1x, CDMA2000 1x EV-DO, and asynchronous IMT-2000 service is evolving as WCDMA UMTS service. In this environment, the problem of synchronous and asynchronous roaming is the biggest problem, and to solve this problem, a terminal supporting dual band / dual mode is used.

However, even when using a terminal supporting the dual band / dual mode, there is no problem when sending data, but the incoming data is not roaming when the data is received.

That is, there is a problem in that data reception is difficult when roaming from a synchronous network to an asynchronous network, and a solution is required.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a roaming service for incoming data from a synchronous CDMA2000 network to an asynchronous WCDMA network. To provide an incoming data roaming service system and method.

1 is a block diagram illustrating a configuration of an incoming data roaming service system from an asynchronous network to a synchronous network of an IMT-2000 according to the present invention;

2 is a block diagram for explaining the configuration of a SIP server according to the present invention;

3 is a block diagram for explaining the configuration of a TCS according to the present invention;

4 is a flowchart illustrating a first embodiment of an incoming data roaming method when roaming from a WCDMA network to a CDMA2000 network according to the present invention;

5 is a flowchart illustrating a second embodiment of an incoming data roaming method when roaming from a WCDMA network to a CDMA2000 network according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100: Synchronous network 130: PDSN

140: DCN 150: MSC

200: Asynchronous 210: RAN

220: SGSN230: GGSN

240: DHLR 250: SIP Server

270: TCS

The incoming data roaming service system from the synchronous network to the asynchronous network of the IMT-2000 using the terminating control system according to the present invention for achieving the above object, the IMT-2000 synchronous network and asynchronous communication network data service gateway node (GGSN) In a mobile communication system including an IMT-2000 asynchronous network, a dual home subscriber server that manages the subscriber information of the synchronous network and the asynchronous network, and call processing related to data reception from the synchronous network to the mobile terminal roaming to the asynchronous network And an incoming control system (TCS) for managing incoming information, and a connection control server (SIP server) for receiving incoming messages from the incoming control system and serving the mobile terminal. In addition, in the method of roaming data from the synchronous network to the asynchronous network of the IMT-2000 using the incoming call control system according to the present invention, when the data is received from the mobile terminal joined to the synchronous network, the incoming call control system is the dual home subscriber server. Inquiring the subscriber information by the mobile station; and performing a session establishment request to the mobile terminal roaming into the asynchronous network according to the inquiry result, wherein the mobile terminal connects to the asynchronous network data service gateway node (GGSN). Establishing a session, registering the mobile terminal with the access control server (SIP server) after setting up a session, notifying registration information to the terminating control system (TCS) and from the access control server (SIP server). Transmitting the received data to the mobile terminal; and a connection control server (SIP server) to the mobile terminal. Characterized in that it comprises the step of forwarding the data. In addition, the incoming data roaming service method from the synchronous network to the asynchronous network of the IMT-2000 using the terminating control system, when the data of the mobile terminal joined to the asynchronous network and roaming into the synchronous network is received, the incoming control system (TCS) is Inquiring subscriber information to the dual home subscriber server; and transmitting the received data to the access control server (SIP server) by the terminating control system (TCS) according to the inquiry result, and a connection control server (SIP server). And forwarding the received data to the mobile terminal roaming into the asynchronous network.

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

1 is a conceptual block diagram illustrating roaming of a mobile communication system using an incoming call control system according to the present invention.

Roaming of the mobile communication system is roaming from an asynchronous IMT-2000 network (hereinafter referred to as "WCDMA") to a synchronous IMT-2000 network (hereinafter referred to as "CDMA2000").

The CDMA2000 network 100, which is a synchronous network, includes a base station (hereinafter referred to as BTC) 110 that performs wireless communication with the wireless terminal 10a, and a base station controller (hereinafter, referred to as 'BSC') for controlling the BTC 110. 120, a Packet Data Service Node (hereinafter referred to as PDSN) 130 connected to the BSC 120 and serving packet data, and a PDSN 130. A data core network (hereinafter referred to as "DCN") 140 performing an Internet access service and a switch (hereinafter referred to as "MSC") connected to the base station controller 120 to perform an exchange 150 ), And a voice network (hereinafter referred to as 'PSTN') 160 connected to the MSC 150.

The WCDMA network 200, which is an asynchronous network, includes a base station and a base station controller for controlling the base station, and is connected to the mobile terminal 10b (RAN; 210), and is connected to the wireless network 210 to the mobile terminal ( 10b) Serving GPRS Service Node (SGSN) 220 for managing mobility and asynchronous communication network data service gateway node (hereinafter referred to as 'GGSN'), which is a relay device that performs packet service control and packet data delivery. 230.

In addition, a connection establishment server (Session Initiation Protocol server, hereinafter referred to as 'SIP server') 260, a call reception system (hereinafter referred to as 'TCS') 270 that manages call processing and incoming information related to an incoming call; And a dual home location register (DHLR) 240 which manages subscriber information and location information of the WCDMA and CDMA 2000 subscriber information and location information, which will be described later.

The SIP server 260 is a server that performs call setup of various services as well as VoIP service between terminals or users and controls a text-based application layer control protocol.

In this embodiment, the CDMA2000 network 100 shares a home subscriber server for managing subscriber information and location information with the DHLR 250 of the WCDMA 200 described above. However, the CDMA2000 network 100 and the WCDMA network 200 may each have a separate home subscriber server (HLR).

2 is a block diagram illustrating a configuration of a SIP server according to the present invention. 2, the SIP server 260 is an International Mobile Subscriber Identity (IMSI), WCDMA terminal information (hereinafter referred to as 'MSISDN') and IP address, which is information for searching for mobile information of a called terminal of the WCDMA network 100. A first database 261 for managing subscriber information including an Internet Protocol address, and a second database 262 for managing subscriber information including a MIN and an IP address of a subscriber of the CDMA2000 network 100. do.

3 is a block diagram for explaining the configuration of the incoming call control system (TCS) according to the present invention. Referring to FIG. 3, the TCS 270 includes a first database 271 for managing a mapping table of subscriber information including IMSI, MSISDN, and IP address of a WCDMA network 200 subscriber, and a CDMA2000 network 100 subscriber. And a second database 272 for managing a mapping table of subscriber information including the MIN and the IP address of the subscriber, and a third database 273 for managing the user ID of the subscriber.

Hereinafter, a method of terminating data roaming service from a synchronous CDMA network to an asynchronous WCDMA network will be described.

4 is a flowchart illustrating a first embodiment of a method for roaming incoming data when roaming from a CDMA2000 network to a WCDMA network according to the present invention. 4 illustrates a case in which the mobile terminal does not establish a session after roaming from the CDMA2000 network 100 to the WCDMA network 200.

When the dual mode / dual band mobile terminal 10a subscribed to the CDMA2000 network 100 roams into the WCDMA network 200, the location information of the mobile terminal 10b is registered as the DHLR 240.

At this time, if the data is received at the TCS 270, which is the terminating control system in the state that the session is not established (S10), the TCS 270 is the subscriber location to the DHLR 240 to query the information of the subscriber to which the incoming data is delivered. Information is inquired (S20). The inquiry message at this time includes roaming information.

The DHLR 240 responds to the TCS 270 with the corresponding information according to the subscriber location information inquiry request of the TCS 270 (S30). According to the response from the DHLR 240, the TCS 270 receives information about the state of the mobile terminal 10b roaming from the CDMA2000 network 100 to the WCDMA network 200 and the address of the SGSN that manages the mobility of the current terminal. You can check it.

At this time, since the TCS 270 is not registered, the TCS 270 makes a session establishment request to the mobile terminal 10b through the corresponding SGSN 220 (S40). The session establishment request is transmitted to the mobile terminal 10b through the SGSN 220 and the RAN 210, and thus the mobile terminal 10b connects to the GGSN 230 through the RAN 210 and the SGSN 220. By performing the PDP context setting to perform the session configuration (S50).

When the session setup is completed in step S50, the mobile terminal 10b registers with the SIP server 250 (S60). At this time, the mobile terminal 10b registers by transmitting the terminal information (MSISDN) and the IP address to the SIP server 250 for registration. After the registration is performed in step S60, the SIP server 250 notifies the registration information to the TCS 270 (S70).

The TCS 270 transfers the incoming data to the SIP server 250 in step S10 (S80), and the SIP server 250 transfers the incoming data to the mobile terminal 10b through the RAN 210 (S90). ).

Accordingly, data reception from the CDMA2000 network 100 to the mobile terminal 10b roaming to the WCDMA network 200 and the session is not established is completed.

5 is a flowchart illustrating a second embodiment of an incoming data roaming method when roaming from a CDMA2000 network to a WCDMA network according to the present invention. 5 illustrates a case in which a mobile terminal sets up a session after roaming from the CDMA2000 network to the WCDMA network 100.

The session establishment process is as follows.

When the dual mode / dual band mobile terminal 10a subscribed to the CDMA2000 network 100 roams into the WCDMA network 200, the location information of the mobile terminal 10b is registered as the DHLR 240. At this time, the mobile terminal 10b accesses the GGSN 230 and generates a PDP context to generate a session (S110). The mobile terminal 10b transmits an IP address (if a dynamic IP address is allocated) and MSISDN, which is terminal information, to be registered with the SIP server 250, and the SIP server 250 performs registration ( S120). After the registration is completed, the SIP server 250 notifies the registration information to the TCS 270 (S130).

The session establishment is completed by the above process.

Meanwhile, the data to be received by the mobile terminal 10b roamed by the WCDMA network 200 is received by the TCS 270, which is a call control system in the form of a user ID, for example, MSISDN (or MIN) @ SKT.COM. (S210).

The TCS 270 inquires the subscriber location information to the DHLR 240 including the subscriber information (IMSI) and roaming information of the user ID to inquire the subscriber's information to which the incoming data will be transmitted (S220).

The DHLR 240 transmits the location information of the subscriber corresponding to the IMSI (information including information of the corresponding SGSN and roaming information) to the TCS 270 in response to the subscriber location information inquiry request of the TCS 270 (S230). ).

The TCS 270 may determine whether the current state of the mobile terminal 10b is located in the CDMA2000 network 100 as the home network or roams into the WCDMA network 200 according to the response from the DHLR 240.

If the location of the mobile terminal is located in the CDMA2000 network 100 which is the home network, the TCS 270 transfers the data to the PDSN 130 of the CDMA2000 network 100 and transmits the data to the mobile terminal according to a conventional procedure.

However, when the mobile terminal roams to the WCDMA network 200 as a result of the response of the DHLR 260, the TCS 270 transfers the incoming data to the SIP server 250 (S240), and the SIP server 240 is the mobile terminal 10b. Data is transmitted to the mobile terminal 10b through the SGSN 220 and the RAN 210 corresponding to the step S250.

As described in detail above, according to the method of roaming data from the synchronous network to the asynchronous network of the IMT-2000 according to the present invention, even when the synchronous network CDMA2000 user roams to the asynchronous network WCDMA, data reception can be easily performed. It can be effective.

Claims (9)

A dual home subscriber server managing each subscriber information of the synchronous network and the asynchronous network in a mobile communication system including an IMT-2000 asynchronous network including an IMT-2000 synchronous network and an asynchronous network data service gateway node (GGSN); An incoming call control system (TCS) for managing call processing and incoming information related to incoming data from the synchronous network to a mobile terminal roaming from an asynchronous network, Inbound data roaming service system from the synchronous network to the asynchronous network of the IMT-2000 using the incoming control system, characterized in that it comprises a connection control server (SIP server) to receive the incoming message from the incoming control system to service the mobile terminal . The method of claim 1, The connection control server (SIP server), A first database for managing subscriber information of the synchronous network, and a second database for managing subscriber information of the asynchronous network, from the synchronous network of the IMT-2000 to the asynchronous network using the incoming call control system. Incoming data roaming service system. The method of claim 1, The terminating control system (TCS) is commonly applied to the synchronous network and the asynchronous network, and includes a first database for managing a mapping table for subscriber information of the synchronous network and a mapping table for subscriber information of the asynchronous network. And a third database for managing the user ID and a third database for managing the user ID of the subscriber. The data roaming service system of the synchronous network to the asynchronous network of the IMT-2000 using the incoming call control system. The method of claim 2 or 3, The subscriber information of the synchronous network includes a mobile station number (MIN) and an IP address of the mobile terminal, and the subscriber information of the asynchronous network includes information (IMSI) for finding mobile information of the called mobile terminal, and terminal information of the asynchronous mobile terminal ( Incoming data roaming service system from the synchronous network to the asynchronous network of the IMT-2000 using the terminating control system characterized in that it comprises a MSISDN) and an IP address. An IMT-2000 asynchronous network including an IMT-2000 synchronous network and an asynchronous communication network data service gateway node (GGSN), a dual home subscriber server managing subscriber information of the synchronous network and the asynchronous network, and data to the mobile terminal. In a system including a terminating control system (TCS) for managing call processing and terminating information related to an incoming call, and a connection control server (SIP server) receiving an incoming message from the terminating control system and serving a mobile terminal, When the data is received by the mobile terminal subscribed to the synchronous network, inquiring of the subscriber information to the dual home subscriber server; Performing, by the incoming call control system, a session establishment request to the mobile terminal roaming into the asynchronous network according to the inquiry result; Establishing a session by the mobile terminal connecting with the asynchronous network data service gateway node (GGSN); Registering by the mobile terminal with the access control server (SIP server) after the session establishment; Notifying the registration information to the terminating control system (TCS) and transferring the received data from the terminating control system (SIP server); And a step of transmitting, by the access control server (SIP server), the data to the mobile terminal, from the synchronous network to the asynchronous network of the IMT-2000 using the incoming control system. The method of claim 5, wherein The registration information is a roaming data roaming service method from the synchronous network to the asynchronous network of the IMT-2000 using the terminating control system, characterized in that the terminal information and the IP address of the mobile terminal. An IMT-2000 asynchronous network including an IMT-2000 synchronous network and an asynchronous network data service gateway node (GGSN), a dual home subscriber server managing subscriber information of the synchronous network and the asynchronous network, and data to the mobile terminal. In a system including a terminating control system (TCS) for managing call processing and terminating information related to an incoming call, and a connection control server (SIP server) receiving an incoming message from the terminating control system and serving a mobile terminal, When the data of the mobile terminal subscribed to the asynchronous network and roaming into the synchronous network is received, the terminating control system (TCS) inquiring subscriber information to the dual home subscriber server; Forwarding the received data to the access control server (SIP server) by the terminating control system (TCS) according to the inquiry result; And transmitting, by the access control server (SIP server), the received data to the mobile terminal that is roaming into the asynchronous network in the synchronous network of the IMT-2000 using the incoming control system. Incoming data roaming service method. The method of claim 7, wherein Activating the mobile terminal, the asynchronous network data service gateway node (GGSN), and a packet data protocol context (PDP context), registering information according to the activation as a connection control server (SIP server); A method for roaming incoming data from a synchronous network to an asynchronous network of an IMT-2000 using a terminating control system comprising a step of a control server (SIP server) notifying the terminating control system (TCS) of the registration information. . The method of claim 8, The data transmitted from the terminating control system (TCS) to the access control server (SIP server) includes information and IP address of the corresponding mobile subscriber station, and is asynchronous in the synchronous network of the IMT-2000 using the terminating control system. Method of incoming data roaming service to network.