KR20040042493A - Roaming Service System and Method from Asynchronous Network to Synchronous Network of IMT-2000Using Termination Control System - Google Patents

Abstract

PURPOSE: A termination data roaming service system from a WCDMA(Wideband Code Division Multiple Access) network to a CDMA2000 network by using a TCS(Termination Control System) and a method therefor are provided to roam termination data from the asynchronous WCDMA network to the synchronous CDMA2000 network. CONSTITUTION: A DHLR(Dual Home Location Register)(190) manages respective subscriber information of a WCDMA network(100) and a CDMA2000 network(200). A TCS(180) processes calls terminated to a mobile terminal which roams from the WCDMA network(100) to the CDMA2000 network(200), and manages termination information. An SIP(Session Initiation Protocol) server(170) receives a termination message from the TCS(180), 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.

Description

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

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

Currently, mobile communication service technology can be 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 an asynchronous network to a synchronous 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 an IMT-2000 asynchronous network to a synchronous network using a call control system for roaming incoming data from an asynchronous WCDMA network to a synchronous CDMA2000 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>

110: wireless network 120: SGSN

130: GGSN140: CP

150: WAP server 160: SMSC

170: SIP server 180: TCS

190: DHLR 210: BTC

220: BSC 230: MSC

260: PDSN 270: DCN

In order to achieve the above object, an incoming data roaming service system from the asynchronous network to the synchronous network of the IMT-2000 using the incoming call control system according to the present invention is provided with an asynchronous data communication network service node (SGSN) managing mobility of a mobile terminal. Dual home subscriber server for managing each subscriber information of the asynchronous network and the synchronous network in a mobile communication system including an IMT-2000 asynchronous network and an IMT-2000 synchronous network and a WAP server, roaming from the asynchronous network to the synchronous network An incoming call control system (TCS) for managing call processing and incoming information related to incoming data to a mobile terminal in use, and a connection control server (SIP server) for receiving incoming messages from the incoming control system and serving the mobile terminal; It features. In addition, the incoming data roaming service method from the asynchronous network to the synchronous network of the IMT-2000 using the incoming call control system according to the present invention, when the data is received by the mobile terminal joined to the asynchronous network, the subscriber information is inquired by the dual home subscriber server If the mobile terminal is roaming into a synchronous network, the method transmits a short message to the mobile terminal. After receiving the short message, the mobile terminal performs a PPP connection with the packet data service node (PDSN) to allocate a session of the synchronous network. Receiving step, after the session allocation, the mobile terminal is characterized in that it comprises the step of downloading the data by connecting to the corresponding location according to the information contained in the short message. In addition, the method of roaming data from the asynchronous network to the synchronous network of the IMT-2000 using the terminating control system according to the present invention, manages the mobility of the mobile terminal and the IMT-2000 synchronous network including a packet data service node (PDSN) IMT-2000 asynchronous network including SGSN, dual home subscriber server that manages subscriber information of the synchronous network and asynchronous network, and call control for managing call processing and incoming information related to incoming data to the mobile terminal. In a system including a system (TCS) and a connection control server (SIP server) for receiving an incoming message from the incoming call control system and serving a mobile terminal, data of a mobile terminal joined to an asynchronous network and roaming into the synchronous network are stored. When the incoming call control system (TCS) inquires the subscriber information to the dual home subscriber server, according to the inquiry result The incoming call control system (TCS) forwards the incoming data to the access control server (SIP server), and the access control server (SIP server) sends the received data to the packet data service node (PDSN) of the synchronous network. And transmitting the data to the mobile terminal by the packet data service node (PDSN) of the synchronous network.

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

1 is a block diagram illustrating roaming of a mobile communication 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 WCDMA network 100 includes a base station and a base station controller for controlling the base station, and is connected to the mobile terminal 10a (RAN) 110, and is connected to the wireless network 110 and the mobile terminal 10a. A Serving GPRS Service Node (SGSN) 120 that manages mobility of the server, a Gateway GPRS Supporting Node (GGSN) 130 that is a relay device that performs packet service control and packet data delivery, and a contents provider that provides content. (Hereinafter referred to as 'CP') 140 and the WAP server 150.

In addition, SMSC 160, which is a short message center, a Session Initiation Protocol server (hereinafter referred to as a SIP server) 170, and an incoming call control system for managing call processing and incoming information related to an incoming call (hereinafter ' TCS '180 and a dual home location server (hereinafter referred to as' DHLR') that manages subscriber information and location information of WCDMA and subscriber information and location information of CDMA 2000, which will be described later. ).

The SIP server 170 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.

The CDMA2000 network 200 includes a base station 210 (hereinafter referred to as 'BTC') for performing wireless communication with the wireless terminal 10b and a base station controller (hereinafter referred to as 'BSC') for controlling the BTC 210. ) 220, a switch (hereinafter referred to as MSC) 230 connected to the base station controller 220 to perform an exchange, and a voice network connected to the MSC 230 (hereinafter referred to as PSTN). A packet data service node (hereinafter referred to as PDSN) 260 which is connected to the BSC 220 and serves packet data, and is connected to the PDSN 260. A data core network (hereinafter referred to as 'DCN') 270 is included.

In the present embodiment, the CDMA2000 network 200 shares the above-described DHLR 190 of the WCDMA 100 as a home subscriber server for managing subscriber information and location information. However, the CDMA2000 network 200 and the WCDMA network 100 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 170 is an International Mobile Subscriber Identity (IMSI), WCDMA terminal information (hereinafter referred to as 'MSISDN') and IP address, which is information for finding mobile information of a called terminal of the WCDMA network 100. A first database 171 for managing subscriber information including an Internet Protocol address, and a second database 172 for managing subscriber information including a MIN and an IP address of a subscriber of the CDMA2000 network 200. 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 180 includes a first database 181 for managing a mapping table of subscriber information including IMSI, MSISDN, and IP address of a WCDMA network 100 subscriber and a CDMA2000 network 200 subscriber. And a second database 182 for managing a mapping table of subscriber information including the MIN and the IP address of the subscriber station, and a third database 183 for managing a user ID of the subscriber.

Hereinafter, a roaming method from a WCDMA network to a CDMA2000 network according to the present invention will be described.

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

When the dual mode / dual band mobile terminal 10a subscribed to the WCDMA network 100 roams to the CDMA2000 network 200, the location information of the mobile terminal 10b is a dual home subscriber server, that is, the DHLR 190. It is registered as

As described above, when data is received in the form of user ID (for example, MSISDN (or MIN) @ SKT.COM) in the state of not establishing a session to the TCS 180, which is the terminating control system (S10), the TCS ( 180, the subscriber location information is inquired by requesting MSISDN (or MIN) information and roaming information to the DHLR 190 in order to inquire the information of the subscriber to which the incoming data has been transmitted (S20).

The DHLR 190 responds with the corresponding information to the TCS 180 according to the subscriber location information inquiry request of the TCS 180 (S30). The TCS 180 may confirm that the current state of the mobile terminal 10a roams into the CDMA2000 network 200 according to the response from the DHLR 190. Accordingly, the TCS 180 transmits information related to the incoming data, for example, URL information having the incoming data, to the SMSC 160 that processes the short message in step S10 (S40).

The SMSC 160 transmits the URL information where the incoming data is located to the CDMA2000 network 200, and delivers the URL information having the incoming data to the mobile terminal 10b (S50). Accordingly, the mobile terminal 10b receives the URL information with the incoming data and then assigns a session by performing a PPP (Point to Point Protocol) connection to the PDSN 260 through the BSC 220 (S60). After the session is allocated in step S60, the mobile terminal 10b registers with the SIP server 170 (S70). And the SIP server 170 notifies the registration information (MIN and IP address) to the TCS (180) (S80).

The mobile terminal 10b accesses the WAP server 150 or the CP 140 according to the URL where the incoming data is located and downloads the incoming data (S90).

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. 5 illustrates a case in which a mobile terminal sets up a session after roaming from the WCDMA network 100 to the CDMA2000 network 200.

The process of setting up a session is as follows.

When the dual mode / dual band mobile terminal 10a subscribed to the WCDMA network 100 roams to the CDMA2000 network 200, the location information of the mobile terminal 10b is registered as the DHLR 260. At this time, the mobile terminal 10b accesses the PDSN 260 to create a session and performs a PPP connection (S110). If the mobile terminal 10b uses the dynamic IP address, the IP address is assigned to the mobile terminal 10b in step S110. In addition, the mobile terminal 10b transmits an MSISDN (or MIN), which is an IP address and terminal information allocated for registration to the SIP server 170, and the SIP server 170 performs registration (S120). After the registration is completed, the SIP server 170 notifies the registration information to the TCS 180 (S130).

The session establishment is completed by the above process.

Meanwhile, the data to be received by the mobile terminal 10b roamed by the CDMA2000 network 200 is received by the TCS 180, which is a call control system in the form of a user ID, for example, MSISDN (or MIN) @ SKT.COM. (S210).

When the data is received by the TCS 180, which is the terminating control system, the TCS 180 sends the subscriber information (IMSI) to the DHLR 190 and requests roaming information to inquire the information of the subscriber to which the incoming data has been transmitted. Inquire the location information (S220).

The DHLR 190 responds with the corresponding information to the TCS 180 according to the subscriber location information inquiry request of the TCS 180 (S230). The TCS 180 may confirm that the current state of the mobile terminal 10a roams into the CDMA2000 network 200 according to the response from the DHLR 190.

The TCS 180 obtains the MIN (or MSISDN) and the IP address of the mobile terminal from the second database 182 and includes the information in the incoming data to the SIP server 170 (S240). The SIP server 170 transfers the incoming data transmitted from the TCS 180 to the PDSN 260 of the CDMA2000 network 200 (S180). The PDSN 260 transfers data to the BSC 220 (S260).

At this time, the MSC 230 requests the base station service to the BSC 220, and the BSC 220 transmits a response to the MSC 230 (S270).

The BSC 220 checks the state of the mobile terminal corresponding to the MIN (or MSIDSN) in response to a request from the MSC 230. If the mobile terminal 10b is in a Dormant state, the mobile terminal 10b makes a paging request to the MSC 230 (S281). Under the control of the MSC 230, the BSC 220 makes a paging request to the mobile terminal 10b and receives a response (S282).

If paging is completed in step S282 or if the mobile terminal is not doped in step S270, the BSC 220 transmits the data received in step S260 to the mobile terminal (S290).

As described in detail above, according to the method of roaming data from the asynchronous network to the synchronous network of the IMT-2000 using the terminating control system according to the present invention, when the asynchronous network user roams into the synchronous network, regardless of session establishment, This has the effect of enabling data reception.

Claims (11)

In the mobile communication system including the IMT-2000 asynchronous network including the asynchronous data communication network service node (SGSN) for managing the mobility of the mobile terminal and the IMT-2000 synchronous network and the WAP server, the subscriber information of the asynchronous network and the synchronous network Manages dual home subscriber servers, Incoming control system (TCS) for managing call processing and incoming information related to data incoming from the asynchronous network to the mobile terminal roaming to the synchronous network, Incoming data roaming service system from the asynchronous network to the synchronous 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 asynchronous network of the IMT-2000 to the synchronous network using the incoming call control system. Incoming data roaming service system. The method of claim 1, The incoming call control system (TCS), A first database for managing a mapping table for subscriber information of the synchronous network, a second database for managing a mapping table for subscriber information of the asynchronous network, and a third database for managing a user ID of the subscriber; An incoming data roaming service system from the asynchronous network to the synchronous network of the IMT-2000 using the incoming call control system comprising a. 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 asynchronous network to the synchronous 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 a packet data service node (PDSN) and an IMT-2000 asynchronous network and a WAP server including an SGSN for managing mobility of a mobile terminal, and managing subscriber information of the synchronous network and an asynchronous network. A dual home subscriber server, an incoming call control system (TCS) that manages call processing and incoming information related to incoming data to the mobile terminal, and an access control server that receives incoming messages from the incoming call control system and services the mobile terminal ( In a system including a SIP server) Querying subscriber information to the dual home subscriber server when data is received by the mobile terminal subscribed to the asynchronous network; Transmitting a short message to the mobile terminal when the mobile terminal is roaming to the synchronous network as a result of the inquiry; Receiving, by the mobile terminal, a PPP connection with the packet data service node (PDSN) after receiving the short message and allocating a session of the synchronous network; After the session allocation, the mobile terminal accesses the corresponding location according to the information included in the short message and downloads the data to the asynchronous network of the IMT-2000 using the incoming call control system. Incoming data roaming service method. The method of claim 5, wherein After performing the PPP connection, the mobile terminal further includes registering subscriber information including an IP address with a connection control server (SIP server) according to terminal device information and the session assignment. Incoming data roaming service method from asynchronous network to synchronous network of IMT-2000. The method of claim 5, wherein The short message includes a URL where the received data is located, and the mobile terminal receives a call control system, wherein the mobile terminal downloads data from a WAP server or a content provider corresponding to the URL. Incoming data roaming service method from asynchronous network to synchronous network of IMT-2000. IMT-2000 asynchronous network including packet data service node (PDSN) and IMT-2000 asynchronous network including SGSN for managing mobility of mobile terminals, and dual home subscribers managing subscriber information of the synchronous network and asynchronous network. A server, an incoming call control system (TCS) that manages call processing and incoming information related to incoming data to the mobile terminal, and an access control server (SIP server) receiving incoming messages from the incoming call control system and serving the mobile terminal. In a system that includes, 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; Transmitting, by the access control server (SIP server), the received data to a packet data service node (PDSN) of the synchronous network; The method of claim 1, wherein the packet data service node (PDSN) of the synchronous network delivers data to the mobile terminal. The method of claim 8, Performing a PPP connection with the mobile terminal and a packet data service node (PDSN) of the synchronous network to register with the synchronous network, and registering the registration information with the access control server (SIP server); A method for roaming incoming data from an asynchronous network to a synchronous network in an IMT-2000 using a terminating control system comprising a step in which a control server (SIP server) informs the terminating control system (TCS) of the registration information. . The method of claim 9, When the packet data service node PDSN of the synchronous network transfers data to the mobile terminal, the mobile terminal determines the state of the mobile terminal through a base station controller (BSC) and, if the state is doped, sends the mobile terminal to the base station controller BSC. Performing a paging request of the; After the paging is completed, the incoming data roaming service method from the asynchronous network to the synchronous network of the IMT-2000 using the incoming control system, characterized in that for transmitting the incoming data to the mobile terminal. The method of claim 8, The data transmitted from the terminating control system (TCS) to the access control server (SIP server) includes information on the subscriber mobile terminal and an IP address, and is synchronized in an asynchronous network of the IMT-2000 using the terminating control system. Method of incoming data roaming service to network.