KR100589955B1 - Mobile Communication Network System and Method for Acquirement of Synchronous Mobile Communication Network Information for Hand Over from Asynchronous Mobile Communication Network to Synchronous Mobile Communication Network - Google Patents

Abstract

The present invention provides a mobile communication system capable of acquiring system information of a synchronous mobile communication network for providing a smooth handover from an asynchronous mobile communication network to a synchronous mobile communication network, and from the asynchronous mobile communication network to the synchronous mobile communication network. A method of acquiring system information during handover, wherein the system information management unit collects system information of a synchronous mobile communication network, makes a database in a system information database, and requests a handover for a mobile communication terminal from an access network of an asynchronous mobile communication network. If present, the switch of the asynchronous mobile communication network inquires the information of the synchronous mobile communication network from the system information database through the system information management unit, selects the switch of the synchronous mobile communication network to perform handover according to the information, and selects the information and the selected synchronization. move By generating a billing ID according to the exchange information of the communication network, generating a handover request message and transmitting it to the selected exchange of the synchronous mobile communication network, it is possible to form a dedicated channel for handover. Since system information of a mobile communication network can be obtained, a smooth handover can be provided.

Description

Mobile communication system and method for acquiring a synchronous mobile communication network during handover from asynchronous mobile communication network to a synchronous mobile communication network information for handover from asynchronous mobile communication network to Synchronous Mobile Communication Network}

1 is a block diagram illustrating a connection between a mobile communication terminal and a mobile communication network according to the present invention;

2 is a block diagram for explaining the configuration of a mobile communication terminal according to the present invention;

3 is a block diagram for explaining the configuration of a mobile communication terminal according to the present invention;

4 is a conceptual diagram illustrating a system information acquisition process of a synchronous mobile communication network according to the present invention;

5A is a block diagram illustrating a switch structure of an asynchronous mobile communication network according to the present invention;

5B is a flowchart illustrating a process of acquiring system information of a synchronous mobile communication network according to the present invention;

6A to 6C are explanatory diagrams for explaining parameters according to the present invention;

7 is a flowchart illustrating a handover process including a system information acquisition process of a synchronous mobile communication network according to an embodiment of the present invention.

<Brief description of the main parts of the drawings>

100: asynchronous mobile communication network 200: synchronous mobile communication network

400: mobile communication terminal 410: antenna

420: asynchronous wireless device 430: synchronous wireless device

440: common module 443: main processor

The present invention provides a mobile communication system capable of acquiring system information of a synchronous mobile communication network for providing a smooth handover from an asynchronous mobile communication network to a synchronous mobile communication network, and from the asynchronous mobile communication network to the synchronous mobile communication network. The present invention relates to a method of obtaining system information during handover.

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 (synchronous mobile communication network) is evolving into CDMA2000 1x, CDMA2000 1x EV-DO, and asynchronous IMT-2000 service (asynchronous mobile communication network) is developing into WCDMA UMTS service. Doing. In such an environment, the problem of roaming between synchronous and asynchronous is the biggest problem. Accordingly, a terminal supporting dual band / dual mode has been developed to roam the synchronous mobile network and the asynchronous mobile communication network smoothly.

The asynchronous mobile communication network is being built around an area with high service demands. Accordingly, the synchronous mobile communication network has evolved into a form in which the service area includes a service area of an asynchronous system. In the case of mutual movement between a system and a synchronous mobile communication system, handover between systems is required to provide continuous services, and a handover method for this is required.

When performing this handover procedure, the asynchronous mobile communication system should search for the target exchange of the synchronous mobile communication system, establish a relay line between the retrieved synchronous exchange and the asynchronous exchange, and transmit data through the relay line. To this end, it is necessary for an asynchronous mobile communication system to grasp switch information, signal point information, relay line setting information, etc. of a synchronous mobile communication system. At present, a structure for acquiring such information between an asynchronous mobile communication system and a synchronous mobile communication system is proposed. There is a problem that a generation cannot provide a continuous service between different mobile communication systems.

Accordingly, to solve the above problems, the present invention provides a synchronous mobile communication network for handover in order to provide a smooth handover when moving from an asynchronous mobile communication network of a mobile communication terminal supporting dual band / dual mode to a synchronous mobile communication network. It is an object of the present invention to provide a mobile communication system capable of acquiring system information and a method for acquiring system information of a synchronous mobile communication network during handover from the asynchronous mobile communication network to the synchronous mobile communication network.

A mobile communication system according to the present invention for achieving the above object is a dual stack home that is mixed with an asynchronous mobile communication network and a synchronous mobile communication network, and manages subscriber information of the asynchronous mobile communication network and a synchronous mobile communication network and is connected to the number seven signal network. In a mobile communication system including a location register and capable of providing a handover to a mobile communication terminal performing asynchronous communication with an asynchronous mobile communication network, the switch of the asynchronous mobile communication network, the switch of the asynchronous mobile communication network, the operation control A visitor management unit for managing a control unit, a network connection unit for accessing an access network and another switch, a number seven connection unit for providing a connection with the number seven signal network, and visitor information for a mobile communication terminal located in a corresponding cell. Exchange of synchronous mobile network to support handover to synchronous mobile network A system information manager for managing information of a system of a synchronous mobile communication network including an ID, a signal point, and a dedicated channel related relay line information, a system information database for storing information through the system information manager, and a handover request of the access network Accordingly, the subscriber information of the mobile communication terminal managed by the visitor management unit is extracted and a message for requesting the subscriber information in the synchronous mobile communication network of the mobile communication terminal is generated through the number seven access unit. In response to a subscriber information request message generation unit to the stack home location register and a handover request of the access network, the asynchronous exchange inquires the system information of the synchronous mobile communication network to perform the handover, and moves to perform the handover. After selecting the exchange of the communication network, the selected synchronization As the billing ID is generated according to the exchange of the mobile communication network, the subscriber information requested by the subscriber information request message generating unit through the dual stack home location register, the information of the synchronous mobile communication network, the information of the selected synchronous exchange, and And a handover request message generator for generating a handover request message based on the billing ID and transmitting the generated handover request message to the selected exchange of the synchronous mobile communication network.

In addition, the system information acquisition method of the synchronous mobile communication network at the time of handover from the asynchronous mobile communication network to the synchronous mobile communication network according to the present invention, the asynchronous mobile communication network and the synchronous mobile communication network is mixed, the subscriber information of the asynchronous mobile communication network and the synchronous mobile communication network A method for acquiring system information of a synchronous mobile communication network during handover in a mobile communication network including a dual stack home location register for managing the information, wherein the switch of the asynchronous mobile communication network is connected to a control unit, an access network, and another exchange for operation control. A network connection unit for providing a connection with the number seven signal network, a system information management unit for managing information of a system of the synchronous mobile communication network to support handover to the synchronous mobile communication network, and the system information. System information data that stores information through management A database, wherein the system information management unit collects system information of a synchronous mobile communication network and makes a database in the system information database, and if there is a handover request for a mobile communication terminal from an access network of the asynchronous mobile communication network. A second step in which the switch of the asynchronous mobile communication network inquires the information of the synchronous mobile communication network from the system information database through the system information manager, and selects a switch of the synchronous mobile communication network to perform the handover according to the information in step 2 In step 3, generating a billing ID according to the information queried in step 2 and the exchange information of the synchronous mobile communication network selected in step 3, wherein the switch of the asynchronous mobile communication network is connected to the dual stack home location register. Requesting information on the synchronous mobile network And a response including the subscriber information queried from the dual stack home location register, the exchange information of the selected synchronous mobile communication network, and the billing ID, based on the results of steps 2 to 5, and receiving a response thereto. And generating a dedicated channel for handover by generating an over request message and transmitting it to the selected exchange of a synchronous mobile communication network.

Hereinafter, with reference to the accompanying drawings to describe the present invention in detail.

1 is a block diagram illustrating the configuration of a synchronous and asynchronous mobile communication network according to the present invention.

Referring to FIG. 1, an asynchronous mobile communication network (WCDMA network) 100 includes a radio station 101 performing wireless communication with a mobile communication terminal 400 and a radio station controller (hereinafter, referred to as 'RNC') for controlling the radio station 101. 102, and a Serving GPRS Support Node (hereinafter referred to as 'SGSN') 103 connected to the RNC 102 to manage mobility of the mobile communication terminal 400; (Gateway GPRS Support Node, hereinafter referred to as 'GGSN'), which is a relay device that performs the packet service control and packet data transmission through the General Packet Radio Service (GPRS) network 104. It includes.

In addition, the RNC 102 is connected to an exchange (hereinafter referred to as "MSC") 110 for performing a call exchange, the MSC 110 is a number seven signal network (No. 7 signaling network) for signal exchange ( 107). The number seven signal network 107 is a short message service center (hereinafter referred to as 'SMSC') 106 for providing a short message, and a dual stack home location register (hereinafter referred to as 'HLR') for managing subscriber location information. 300 is connected.

On the other hand, the synchronous mobile communication network (CDMA2000 network) 200, the base station (hereinafter referred to as 'BTS') for performing wireless communication with the mobile communication terminal 400 and the base station controller for controlling the BTS 201 (Hereinafter referred to as 'BSC') 202, a Packet Data Service Node (hereinafter referred to as 'PDSN') 204 connected to the BSC 202 and serving packet data and the PDSN ( A data core network (hereinafter referred to as "DCN") 209 connected to 204 and performing an Internet access service, and a switch (hereinafter referred to as "MSC") connected to the BSC 202 to perform an exchange. 203).

The MSC 203 is connected with a number seven signal network (No. 7 signal network) 205 for signal exchange. The number seven signal network 205 is connected to a short message service center (hereinafter referred to as SMSC) 206 that services a short message, and the dual stack HLR300 for managing location information of a subscriber.

The MSCs 110 and 203 of the asynchronous mobile communication network 100 and the synchronous mobile communication network 200 are interconnected, and the number seven signal networks 107 and 205 are also interconnected to handover the mobile communication terminal 400. Information necessary for transmitting and receiving is transmitted.

In addition, in the present embodiment, the dual stack HLR 300 connected to the synchronous mobile communication network 200 and the asynchronous mobile communication network 100 respectively provides information and location information of subscribers of the asynchronous mobile communication network 100 and the synchronous mobile communication network 200. Manage and share the asynchronous mobile communication network 100 and the synchronous mobile communication network 200.

2 is a block diagram illustrating a configuration of a dual band mobile communication terminal according to the present invention.

Referring to FIG. 2, the dual band mobile communication terminal 400 according to the present invention supports both synchronous mobile communication and asynchronous mobile communication and has respective protocol stacks.

The mobile communication terminal 400 according to the present invention is broadly divided into an antenna 410 for transmitting and receiving radio waves with the synchronous mobile communication network 200 and the asynchronous mobile communication network 100, and a synchronous radio device 430 for synchronous communication. , Asynchronous radio 420 for asynchronous communication, and a common module 440 for providing common resources in synchronous and asynchronous communication.

The synchronous radio device 430 includes a synchronous radio transmitter 432 for radio transmission, a synchronous radio receiver 433 for radio reception, and a synchronous modem unit 434. The synchronous radio transmitter 432 and One side of the synchronous radio receiver 433 is connected to the antenna 410 through a duplexer 431, and the other side is connected to the synchronous modem unit 434.

In addition, the asynchronous radio device 420 also includes an asynchronous radio transmitter 422 for radio transmission, an asynchronous radio receiver 423 for radio reception, and an asynchronous modem unit 424. The asynchronous radio transmitter 422 and One side of the asynchronous radio receiver 423 is connected to the antenna 410 through the duplexer 421 and the other side is connected to the asynchronous modem unit 424.

The common module 440 may include an application processor, a memory, an input / output unit, other application processing units, etc. that operate as a central processing unit for controlling the synchronous modem unit 434 and the asynchronous modem unit 424 and perform multimedia functions. Detailed configuration is as follows.

3 is a block diagram illustrating a configuration of a common module of a mobile communication terminal according to the present invention.

Referring to FIG. 3, the common module 440 of the mobile communication terminal according to the present invention includes a plurality of dual devices connected to the modem units 424 and 434 of the synchronous radio device 430 and the asynchronous radio device 420. Dual Port RAM (hereinafter referred to as DPRAM) 441 and 442 and the DPRAM 441 and 442 are connected to perform overall control and application execution of synchronous and asynchronous communication of the mobile communication terminal 400. A main processor 443. The main processor 443 includes a memory 444 for storing data, an I / O device 445 for connecting a peripheral device, and a power control module (hereinafter referred to as 'PWM') 446 for power control. Connected.

The common module 440 having the above-described configuration is equipped with software for user interface, additional service, mobility management, access / session control, resource control, and protocol processing, so that users can use various application services and handover. Performs protocol conversion according to the mobile communication system.

4 is a conceptual diagram of acquiring system information of a synchronous mobile communication network and performing a handover in a mobile communication network in which an asynchronous network and a synchronous network are mixed according to an embodiment of the present invention.

Referring to FIG. 4, when the mobile communication terminal 400 moves from the area A of the asynchronous mobile communication network 100 to the boundary area C with the synchronous mobile communication network 200 during a call through a wireless station, the mobile communication terminal 400 moves. The communication terminal 400 requests a handover to a radio station of the asynchronous mobile communication network 100. Accordingly, a handover between the asynchronous mobile communication network 100 and the synchronous mobile communication network 100 for the mobile communication terminal 400 is performed.

That is, the mobile communication terminal 400 located in the asynchronous mobile communication network 100 and using the voice call periodically measures the signal strength with the wireless station 101 and reports the signal strength to the wireless station 101. If the signal strength of the signal falls below a specified threshold, the radio station 101 reports that a handover event has occurred through the RNC 102 to the MSC 110 of the asynchronous mobile communication network 100. In this case, the access network (radio station / RNC) transmits the neighbor cell information, the base station ID, and the like detected by the mobile communication terminal 400 to the MSC 110 of the asynchronous mobile communication network 100.

When the MSC 110 of the asynchronous mobile communication network 100 receives the handover request message from the access network, the neighbor cells in the asynchronous mobile communication network 100 are referred to with reference to neighbor cell information, base station ID, etc. received from the RNC 102. It is determined whether it is handover or handover to the synchronous mobile communication network 200.

In case of handover between adjacent cells in the asynchronous mobile communication network 100 The MSC 110 of the asynchronous mobile communication network 100 performs handover to the adjacent cell, and in case of handover to the synchronous mobile communication network 200, The MSC 110 of the asynchronous mobile communication network 100 inquires the information of the synchronous mobile communication network to perform the handover through the system information manager to be described later, and accordingly the handover is made to the MSC 203 of the synchronous mobile communication network 200. To lose.

The MSC 110 of the asynchronous mobile communication network 100 for performing the above process has the following configuration.

5A is a block diagram illustrating a configuration of an exchange (MSC) of an asynchronous mobile communication network according to the present invention.

Referring to FIG. 5A, the MSC 110 of the asynchronous mobile communication network according to the present invention includes a control unit 111 for operation control, a network connection unit 112 for connecting to an access network, and another switch, and a number seven signal network 107. A number seven connection unit 117 for providing access to the mobile terminal; and a visitor management unit (VLR) 113 for managing visitor information (information of the mobile communication terminal including MSISDN) for the mobile communication terminal located in the cell; And a visitor information database 114 for storing / managing the subscriber information of the mobile communication terminal managed by the visitor manager 113. In addition, to extract the MSISDN information of the mobile communication terminal managed by the visitor management unit 113 and to request the subscriber information in the synchronous mobile communication network 100 of the mobile communication terminal to the dual stack HLR (300) through the information. The subscriber information request message generator 115 generates a message and transmits the message to the dual stack HLR 300 through the number seven access unit 117 and the response of the dual stack HLR 300 according to the subscriber information request message. Accordingly, a handover request message generation unit 116 for generating a handover request message to the synchronous mobile communication network.

At this time, the subscriber information request message generating unit 115 generates an asynchronous message (MAP SEND IMSI) or a synchronous message (Call Data Request) to transmit to the dual stack HLR (300).

The MSC 110 of the asynchronous mobile communication network 100 stores / manages information of the system of the synchronous mobile communication network in order to support handover to the synchronous mobile communication network 200. And a system information database 119 for storing information through the system information management unit 118. The system information manager 118 manages a switch ID, a signal point, a relay channel related relay line information, and the like of the synchronous mobile communication network, and stores the information in the system information database 119.

The MSC 110 of the asynchronous mobile communication network 100 inquires the system information database 119 of the synchronous mobile communication network to perform the handover according to the handover request from the access network through the system information manager 118. do. Then, a message for handover is generated based on the subscriber information inquired by the dual stack HLR 300 and the information inquired by the system information manager 118 and transmitted to the synchronous mobile communication network 200.

Looking at the system information acquisition process of the synchronous mobile communication network according to the above description is as follows.

5B is a flowchart illustrating a process of acquiring system information of a synchronous mobile communication network according to the present invention.

Referring to FIG. 5B, first, the system information manager 118 collects information of the synchronous mobile communication network and stores the information in the system information database 119 (S1).

An access network of the asynchronous mobile communication network 100 includes a handover request message including parameters used in the asynchronous network as shown in FIG. 6A and parameters representing information of the synchronous mobile communication network as shown in FIG. 6B when performing handover. To transmit to the MSC 110 of the asynchronous mobile communication network 100 (S2).

Accordingly, the MSC 110 transmits the message generated through the subscriber information request message generator to the dual stack HLR 300 to inquire the subscriber information (S3).

The MSC 110 performs the following operation for querying subscriber information in step S3. First, the MSC 110 of the asynchronous mobile communication network 100 extracts the asynchronous mobile communication network subscriber information of the mobile communication terminal 400 through the visitor manager 113. The subscriber information request message generator 115 generates a subscriber information request message based on the asynchronous mobile communication network subscriber information extracted through the visitor manager 113. The subscriber information request message generator 115 transmits the generated subscriber information request message to the dual stack HLR 300 through the number seven access unit 117 and the MSC 110 receives the response.

After performing the inquiry of the subscriber information in step S3, the MSC 110 of the asynchronous mobile communication network 100 performs a handover from the system information database 119 through the system information manager 118 to perform a handover. Inquire the system information (S4). The MSC 110 selects the MSC of the synchronous mobile communication network 200 to perform the handover according to the information inquired in step S3 (S5). In operation S6, a billing ID is generated according to the MSC of the selected synchronous mobile communication network 200.

The MSC 110 of the asynchronous mobile communication network 100 includes the subscriber information queried in step S3 and the information of the synchronous mobile communication network queried in step S4, and the MSC information of the synchronous mobile communication network selected in step S5 and step S6. The handover request message generating unit 116 generates a handover request message including the generated billing ID (S7). At this time, the parameters included in the handover request message are shown in FIG. 6C.

The MSC 110 of the asynchronous mobile communication network 100 transmits the generated handover request message to the selected MSC of the synchronous mobile communication network 200 (S8).

The system information acquisition process and the handover method including the same will be described in detail below.

7 is a flowchart illustrating a handover process including a subscriber information acquisition process according to an embodiment of the present invention.

Referring to FIG. 7, during a call from the asynchronous mobile communication network to the asynchronous wireless device 420 of the mobile communication terminal 400 (S10), as the mobile communication terminal 400 moves to an area of the synchronous mobile communication network 200, The mobile communication terminal 400 detects a signal from the synchronous mobile communication network 200. Accordingly, the mobile communication terminal 400 periodically measures the signal strength from the radio station 101 and the signal strength of the neighboring base station (or radio station) of the asynchronous mobile communication network 100 and reports it to the radio station 101. The access network (radio station and RNC) of the asynchronous mobile communication network 100 determines whether the mobile communication terminal 400 is handed over according to the report content (S21). At this time, if the radio station 101 currently connected to the mobile communication terminal 400 confirms that the signal strength between the mobile communication terminal 400 and the radio station 101 is less than or equal to a specified value, the asynchronous mobile communication network (via the RNC 102 ( A handover request message (IU Reloc Required) for handover is transmitted to the MSC 110 of 100 (S22).

In this case, the handover request message includes a handover related message used in the synchronous mobile communication network 200. In addition, the RNC 102 transmits neighbor base station information (base station ID), neighbor cell information, etc. received from the mobile communication terminal 400 together, and the MSC 110 of the asynchronous mobile communication network 100 is asynchronous according to this information. It is determined whether the inter-cell handover in the mobile communication network 100 or the handover to the synchronous mobile communication network 200 is performed.

The handover request message (IU Reloc Required) is synchronized with parameters such as message type, handover type, handover cause, source base station controller ID, target base station controller ID, RAB (Radio Access Bearer) information, and radio section related information. It includes information used in the communication network 200.

Accordingly, the subscriber information request message generator 115 of the MSC 110, which is a core network of the asynchronous mobile communication network 100, moves asynchronously from the mobile communication terminal 400 stored in the visitor information database 114 through the visitor manager 113. It extracts subscriber information (MSISDN) from the communication network 100 and generates a message (Call Data Request) for requesting subscriber information from the synchronous mobile communication network based on this.

The MSC 110 of the asynchronous mobile communication network 100 transmits the generated subscriber information request message to the dual stack HLR 300 (S31) and requests identifier information from the subscriber's synchronous mobile communication network 200. In this case, as described above, the message for requesting the subscriber information may use an asynchronous message (MAP SEND IMSI Req) using a MAP (Mobile Application Part) message.

In response to the subscriber information request, the dual stack HLR 300 sends a response message including ESN and MIN information, which is identifier information in the synchronous mobile communication network 200 of the corresponding subscriber, to the MSC 110 of the asynchronous mobile communication network 100. It transmits (S32).

The MSC 110 of the asynchronous mobile communication network 100 transmits the handover request message FacilitiesDirective2 of the mobile communication terminal 400 corresponding to the MIN information included in the response message to the MSC 203 which is the core network of the synchronous mobile communication network 200. (S41). In this case, the handover request message includes cell information, base station information of the aforementioned synchronous mobile communication network to perform the handover as shown in FIG. 8, and parameters such as billing ID.

The MSC 203 of the synchronous mobile communication network 200 transmits a handover request message to the access networks BTS and BSC of the synchronous mobile communication network 200 according to the handover request message (S42).

The access network of the synchronous mobile communication network is null traffic to the synchronous radio device 430 of the mobile communication terminal 400 corresponding to the MIN through a forward Fundamental Channel (F-FCH) for the transmission of the forward traffic The channel frame is transmitted (S50). The access network BTS / BSC transmits a handover request response message to the MSC 203 (S61). Accordingly, the omnidirectional channel is allocated to the synchronous radio device 430 of the mobile communication terminal 400.

As such, when the handover preparation is completed in the synchronous mobile communication network 200, the MSC 203 of the synchronous mobile communication network 200 transmits a response signal to the asynchronous mobile communication network 100, that is, a handover request message response ( FacilitiesDirective2 Ack) is transmitted (S62). Accordingly, the relay line between the MSC 110 of the asynchronous mobile communication network 100 and the MSC 203 of the synchronous mobile communication network 200 is established.

In more detail, the MSC 110 of the asynchronous mobile communication network 100 establishes a mapping relationship between a date channel, which is a logical trunk line setting identifier, and a physical trunk line, and sends this information to the handover request message (Facilities). Set to the internal exchange circuit ID (InterMSCCircuitID) of Directive2) and transmit it to the MSC 203 of the synchronous mobile communication network 100, and send the response message (Facilities Directive2 Ack in step S62) from the MSC 203 of the synchronous mobile communication network 100. Is transmitted, the relay line is established between the MSC 110 of the asynchronous mobile communication network 100 and the MSC 203 of the synchronous mobile communication network 200. The response message (Facilities Directive2 Ack) in step S62 includes parameters such as CDMA channel data, CDMA channel list, and the like.

Thereafter, the MSC 110 of the asynchronous mobile communication network 100 transmits an IU Relocation Command to inform the access network (radio station / RNC) that the resource allocation for handover is completed (S71). According to the rerouting command in step S71, the access network (radio station / RNC) transmits a handover request message (Handover from UTRAN command) to the asynchronous radio device 420 of the mobile communication terminal 400 (S72). In this case, the handover request message includes a message related to a synchronous mobile communication network, in particular, information for channel allocation.

According to the handover request message in step S72, the asynchronous wireless device 420 requests channel allocation through the main processor 443, and the main processor 443 performs channel allocation to the synchronous wireless device 430 (channel). assignment) (S81).

Accordingly, the synchronous modem unit 434 of the synchronous wireless device 430 performs a setup process (S82). In the setup process, the synchronous modem unit 434 is started through a switch-on and warm-up process, and is synchronized with an access network (BTS / BSC) of the synchronous mobile communication network 200 by acquiring a pilot channel and acquiring a synchronization channel. By performing the operation and acquiring a synchronization channel, timing information, other system information, and the like are received from the access network BTS / BSC.

The synchronous radio 430 transmits a call connection signal to the asynchronous radio 420 through the main processor 443 (S83). Accordingly, mode switching between the asynchronous wireless device 420 and the synchronous wireless device 430 of the mobile communication terminal 400 is completed.

In addition, the synchronous radio apparatus 430 transmits a traffic channel frame through a reverse fundamental channel (R-FCH) to an access network (BTS / BSC) of the synchronous mobile communication network 200 (R-FCH frames) (S91). By doing so, the mobile communication terminal 400 obtains backward synchronization with the synchronous mobile communication network. Accordingly, a connection is established between the mobile communication terminal 400 and the synchronous mobile communication network 200, and the synchronous wireless device 430 of the mobile communication terminal 400 transmits a handover completion message to the access network of the synchronous mobile communication network 200. (S92). The access network (BTS / BSC) receiving this transmits a response signal to the synchronization wireless device 430 (BS Ack Order) (S93).

Thereafter, the access network (BTS / BSC) of the synchronous mobile communication network 200 notifies the MSC 203 of the handover completion (Handoff Complete) (S94), and the MSC 203 of the synchronous mobile communication network 200 moves asynchronously. The handover completion is notified to the core network of the communication network 100 (Mobile On Channel) (S95).

The MSC 110 of the asynchronous mobile communication network 100 requests the radio station / RNC to release the call with the asynchronous wireless device 420 of the mobile communication terminal 400 (Iu Release Command, S101). Accordingly, the asynchronous mobile communication network 100 releases the call with the asynchronous radio device 420, and reports to the core network that the call release is completed (IU Release Complete) (S102).

Accordingly, the handover from the asynchronous mobile communication network 100 of the mobile communication terminal 400 to the synchronous mobile communication network 200 is completed.

The present invention described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. Should be.

As described in detail above, according to the present invention, a system information of a synchronous mobile communication network to perform handover to provide a smooth handover when moving from an asynchronous mobile communication network of a mobile communication terminal supporting dual band / dual mode to a synchronous mobile communication network. It can be obtained, and by using this, there is an effect that can provide a smooth handover to the synchronous mobile communication network.

Claims (11)

Asynchronous mobile communication network and synchronous mobile communication network are mixed, and manages subscriber information of the asynchronous mobile communication network and synchronous mobile communication network, and includes a dual stack home location register connected to the number seven signal network, and performs asynchronous communication with the asynchronous mobile communication network. In a mobile communication system capable of providing handover to a mobile communication terminal, The switch of the asynchronous mobile communication network, A control unit for operation control, Network connection part for connecting with access network and other exchanges, A number seven connection unit for providing a connection with the number seven signal network; Visitor management unit to manage the visitor information for the mobile communication terminal located in the cell, A system information management unit for managing information of a system of a synchronous mobile communication network including switch ID, signal point, and dedicated channel related relay line information of the synchronous mobile communication network to support handover to the synchronous mobile communication network; A system information database for storing information through the system information management unit; In response to the handover request of the access network, extracting subscriber information of the mobile communication terminal managed by the visitor manager and generating a message for requesting subscriber information in the synchronous mobile communication network of the mobile communication terminal through the information. Subscriber information request message generation unit for transmitting to the dual stack home location register through the number seven access unit; According to the handover request of the access network, the asynchronous exchange inquires the system information of the synchronous mobile communication network to perform the handover, selects the exchange of the synchronous mobile communication network to perform the handover, and then switches the selected synchronous mobile communication network. As the billing ID is generated, the subscriber information requested by the subscriber information request message generating unit through the dual stack home location register, the information of the synchronous mobile communication network, the information of the selected synchronous exchange, and the billing ID are selected. And a handover request message generator for generating a handover request message based on the handover request message and transmitting the generated handover request message to the selected exchange of the synchronous mobile communication network. delete delete delete The method of claim 1, The subscriber information request message generating unit generates a subscriber information request message which is a synchronization message including a billing ID and an MSISDN parameter. The method of claim 1, The subscriber information request message generation unit generates a subscriber information request message which is an asynchronous MAP message including an Invoke ID, MSISDN, IMSI, MIN, and ESN parameters. The method of claim 1, The dual stack home location register transmits a response message including ESN and MIN information for a synchronous mobile communication network of the mobile communication terminal to an exchange of an asynchronous mobile communication network according to the subscriber information request message. . A method for acquiring system information of a synchronous mobile communication network during handover in a mobile communication network in which asynchronous mobile communication network and a synchronous mobile communication network are mixed and including dual stack home location registers for managing subscriber information of the asynchronous mobile communication network and a synchronous mobile communication network. As The switch of the asynchronous mobile communication network includes a network connection unit for connection with a control unit for operation control, an access network and another switch, a number seven connection unit for providing a connection with the number seven signal network, and a handover to a synchronous mobile communication network. A system information management unit for managing information of a system of a synchronous mobile communication network for supporting, a system information database storing information through the system information management unit, A first step in which the system information manager collects system information of a synchronous mobile communication network and makes a database in the system information database; Step 2, wherein the exchange of the asynchronous mobile communication network inquires the information of the synchronous mobile communication network from the system information database through the system information manager if there is a handover request for the mobile communication terminal from the access network of the asynchronous mobile communication network; Selecting a switch of a synchronous mobile communication network to perform a handover according to the information queried in step 2, Generating a billing ID according to the information queried in step 2 and the exchange information of the synchronous mobile communication network selected in step 3; Step 5, wherein the switch of the asynchronous mobile communication network requests the synchronous mobile communication network information of the mobile communication terminal to the dual stack home location register and receives a response thereto; Based on the results in steps 2 to 5, a handover request message including the subscriber information inquired from the dual stack home location register, the exchange information of the selected synchronous mobile communication network, and the billing ID is generated and And a sixth step of forming a dedicated channel for handover by transmitting to the selected exchange. 17. The system information obtaining method of the synchronous mobile communication network during handover from the asynchronous mobile communication network to the synchronous mobile communication network. The method of claim 8, The switch of the asynchronous mobile communication network includes a visitor manager that manages visitor information of the mobile communication terminal to query the subscriber information, and a message for requesting subscriber information in the synchronous mobile communication network of the mobile communication terminal to the dual stack home location register. Includes a subscriber information request message generator for generating a, In step 5, if the switch of the asynchronous mobile communication network receives a handover request for the mobile communication terminal from the access network of the asynchronous mobile communication network for inquiry of subscriber information, the switch of the asynchronous mobile communication network is connected to the asynchronous mobile communication network of the mobile communication terminal. Extracting subscriber information through the visitor manager; Generating a subscriber information request message by the subscriber information request message generator based on the asynchronous mobile communication network subscriber information extracted through the visitor manager; Acquiring the system information of the synchronous mobile communication network during handover from the asynchronous mobile communication network to the dual stack home location register and receiving the subscriber information. Way. The method of claim 9, The dual stack home location register may transmit a response message including ESN and MIN information for the synchronous mobile communication network of the mobile communication terminal to the asynchronous mobile communication network according to a message requesting subscriber information. A method of acquiring system information of a synchronous mobile communication network during handover to a synchronous mobile communication network. delete

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