KR100601851B1 - Mixed Mobile Communication System of Asynchronous Communication Network and Synchronous Communication Network having Handover Function of Mobile Communication Terminal, and Handover Method in the Same - Google Patents

Abstract

A mobile communication system in which an asynchronous network and a synchronization network capable of handover of a mobile communication terminal are mixed, and a handover method using an interoperation operation unit in the mobile communication system are provided.

In the present invention, the asynchronous exchange and the synchronous exchange are respectively connected to the dual stack home location register and the interoperation operation unit, and the interoperation operation unit receives the synchronous subscription information of the mobile communication terminal from the home location register according to the handover request of the asynchronous exchange. In addition, the system transmits the synchronization system information and the synchronization subscription information of the mobile communication terminal to the synchronization exchange and receives a response from the synchronization exchange so that a relay line is established during the synchronization exchange and the asynchronous exchange, and the mobile communication terminal and the synchronous mobile communication system are connected and synchronized. When notified from the exchange that the handover is complete, it requests the asynchronous exchange to release the radio connection.

According to the present invention, it is possible to prevent a call disconnection phenomenon at the boundary area between an asynchronous network and a synchronous network, to overcome service gaps between generations, to provide high-quality services, and to reduce the investment cost required to implement an asynchronous mobile communication system. have.

Asynchronous Mobile Communication System, Synchronous Mobile Communication System, IIF, Handover

Description

Mixed Mobile Communication System of Asynchronous Communication Network and Synchronous Communication Network having Handover Function of Mobile Communication Terminal, and Handover Method in the Same }

1 is a configuration diagram of a mobile communication network to which the present invention is applied;

2 is a flowchart illustrating a handover method between an asynchronous network and a synchronous network according to the present invention;

3 to 13 are diagrams showing parameters included in a message for a handover method according to the present invention.

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

10: DBDM mobile communication terminal 20: asynchronous mobile communication system

30: synchronous mobile communication system 40: No.7 common signal network

50: dual stack home position register 60: interlocking operation unit

70: IP network 210: Node B / wireless network controller

220: asynchronous exchange 230: SGSN

240: GPRS network 250: GGSN

310: base station / base station controller 320: switchboard

330: packet data service node 340: data core network

The present invention relates to a handover method in a mobile communication network, and more particularly, to a mobile communication system in which an asynchronous network and a synchronous network capable of handover of a mobile communication terminal are mixed, and an asynchronous exchange and a synchronous exchange period in the mobile communication system. The present invention relates to a handover method for a mobile communication terminal during a voice call using an interoperation operation unit for signal exchange.

With the development of mobile communication technology, mobile communication networks have been changing for generations.Currently, synchronous mobile communication system (CDMA mobile communication system) called 2nd generation or 2.5 generation network and asynchronous mobile communication system (WCDMA) called 3rd generation network. Mobile communication systems) coexist.

With the development of mobile communication network technology, a dual band dual mode terminal (DBDM mobile communication terminal) capable of being used in both a synchronous system and an asynchronous system has been developed. This allows different types of services to be used in each of the asynchronous system domain and the synchronous system domain. The DBDM mobile communication terminal includes an antenna, a synchronous modem unit which is a module for synchronous mobile communication service, an asynchronous modem unit which is a module for asynchronous mobile communication service, and a common module.

However, the asynchronous mobile communication system is still in the early stage of service, and because a huge investment cost is required to implement the system, the asynchronous mobile communication system cannot be serviced in a large area, and thus, the asynchronous mobile communication system is superimposed on the synchronous mobile communication system. Accordingly, since the service area of the asynchronous mobile communication system is limited, the call is disconnected when the subscriber of the asynchronous mobile communication system moves to the synchronous area where the asynchronous mobile communication service is not provided while using the service in the asynchronous area.

As described above, when the asynchronous mobile communication system and the synchronous mobile communication system coexist, and the area of the asynchronous mobile communication system is smaller than the area of the synchronous mobile communication system, a handover for providing continuous services between the asynchronous and synchronous mobile communication systems is necessary. do.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and as the mobile communication terminal using the voice call service in the asynchronous mobile communication system area moves to the synchronous mobile communication system area, interworking of the asynchronous exchange and the synchronous exchange period is performed. The technical problem is to provide a handover method that can provide a continuous service without a call disconnection using the operation unit.

According to another aspect of the present invention, when a mobile communication terminal using a voice call service in the asynchronous mobile communication system area requests a handover to a wireless network controller and an asynchronous exchange receives a handover request from the wireless network controller, It is to determine whether the handover in the communication system or the handover to the synchronous mobile communication system to perform a handover procedure suitable for the handover target.

The present invention provides a mobile communication system that enables a handover of a dual band dual mode mobile communication terminal capable of communicating with an asynchronous mobile communication system and a synchronous mobile communication system in a mobile communication system in which an asynchronous mobile communication system and a synchronous mobile communication system are mixed. The asynchronous exchange and the synchronous exchange are interconnected by an interlocking operation unit, the asynchronous exchange and the synchronous exchange are each connected to a dual stack home location register, and the dual stack home location register is asynchronous subscription information of the mobile communication terminal. And store and manage synchronous subscription information, wherein the interoperation operation unit stores and manages the synchronous mobile communication system information, and obtains synchronous subscription information of the mobile communication terminal from the home location register according to a handover request of the asynchronous exchange. Receive and synchronize with the sync exchanger. Transmits system information and synchronous subscription information of the mobile communication terminal and receives a response from the synchronous exchange so that a relay line is established during the synchronous exchange period with the asynchronous exchange, and the mobile communication terminal and the synchronous mobile communication system are connected to each other. When notified that the handover is completed from the synchronous exchange, the asynchronous exchange may request to release the radio connection.

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

1 is a block diagram of a mobile communication network to which the present invention is applied.

The mobile communication terminal 10 applied to the present invention is a dual band dual mode (hereinafter, referred to as 'DBDM') mobile communication terminal, which is capable of simultaneously providing an asynchronous mobile communication service and a synchronous mobile communication service. It comprises a synchronous modem unit which is a module for, asynchronous modem unit which is a module for asynchronous mobile communication service and a common module, and wirelessly connected to the asynchronous mobile communication system 20 and the synchronous mobile communication system 30, respectively, Data service is available.

The asynchronous mobile communication system 20 is a wireless network controller (Node B / RNC, 210) for controlling Node B and Node B as a base station for wireless section communication with the mobile communication terminal 10, wireless network controller 210 Is connected between the asynchronous exchange (MSC, 220), the radio network controller (RNC) and the GPRS (General Packet Radio Service) network 240 to perform a call exchange for providing a service to the mobile communication terminal (10) It is connected through a Serving GPRS Support Node (SGSN) 230, a SGSN 230, and a General Packet Radio Service (GPRS) network 240 that maintains a location track of the mobile communication terminal 10 and performs access control and security functions. And a Gateway GPRS Support Node (GGSN) 250 connected to the IP network 70 to support interworking with external packets.

In addition, the synchronous mobile communication system 30 is connected to the mobile communication terminal 10 and the base station controller (BTS / BSC, 310) for controlling the base station and the base station for supporting the wireless section communication, and connected to one or more base station controller to perform a call exchange A packet data service node (PDSN, 330), a packet data service node (330), and an IP network (70), which are connected to an exchange (MSC) 320, a base station controller (BSC), to provide a packet data service to a subscriber. It is configured to include a data core network (DCN, 340) to support the connection between.

In addition, the switch 220 and 320 of the asynchronous mobile communication system 20 and the synchronous mobile communication system 30 are interconnected by an interworking interoperability function (IFF) 60, and the interoperable operating unit ( 60 converts an asynchronous message transmitted from the asynchronous exchange 220 into a synchronous message, and transmits the asynchronous message to the synchronous exchange 320.

The asynchronous exchanger 220 and the synchronous exchange 320 are also interconnected to the No. 7 common signal network 40 and thereby connected to the dual stack home position register (D-HLR) 50, and the dual stack home position. The register 50 stores and manages asynchronous mobile communication system subscription information of the DBDM mobile communication terminal 10 and corresponding synchronous mobile communication system subscription information, and the asynchronous and synchronous exchanges 220 and 320 provide services such as handover. It can be referred to when executing.

In such a network configuration, the mobile communication terminal 10 using the voice call located in the asynchronous mobile communication system 20 area periodically measures the signal strength with the node B, reports it to the node B, and the signal with the node B. If the strength drops below the specified threshold, the NodeB reports to the asynchronous exchange 220 via the RNC that a handover event has occurred. In this case, the Node B / RNC 210 transmits the neighbor cell information, the base station ID, etc. detected by the mobile communication terminal 10 to the asynchronous switch 220.

When the asynchronous switch 220 receives the handover request message from the RNC, the synchronous mobile communication system 30 determines whether it is a handover between adjacent cells in the asynchronous mobile communication system 20 with reference to neighbor cell information, base station ID, and the like received from the RNC. Determine if handover

In the case of handover between adjacent cells in the asynchronous mobile communication system 20, the asynchronous exchange 220 performs handover to the adjacent cell, and in the case of handover to the synchronous mobile communication system 30, through the IIF 60. Handover is made to the synchronous exchange 320. To this end, the IIF 60 converts an asynchronous message into a synchronous message and transmits it to the synchronous exchange 320, and pre-configures and manages synchronous mobile communication system information as a database. The database contains exchange information, signaling points, and trunk line information for the dedicated channel. The IIF 60 selects the handover target exchange 320 according to the handover request from the asynchronous exchange 220 and the synchronous mobile communication system information, and generates a billing ID including a handover target exchange ID and the like. It is used in the subsequent handover process.

This handover procedure will be described in more detail with reference to FIG. 2 as follows.

2 is a flowchart illustrating a handover method between an asynchronous network and a synchronous network according to the present invention.

As the mobile communication terminal 10 using the voice call in the asynchronous mobile communication system 20 moves to the synchronous mobile communication system 30, the mobile communication terminal 10 is moved from the synchronous mobile communication system 30. Signal is detected from the Node B of the asynchronous mobile communication system 20 and the signal strength with the neighboring base station (or Node B) periodically measured and reported to the Node B. Accordingly, when the Node B currently connected to the mobile communication terminal 10 confirms that the signal strength between the mobile communication terminal and the Node B is less than or equal to a specified value, the handover is requested to the asynchronous exchanger 220 through the RNC (IU Reloc). Required) (S101).

This handover request message (IU Reloc Required) includes a handover related message used in a synchronous mobile communication system. In addition, the RNC transmits neighbor base station information (base station ID), neighbor cell information, etc. received from the mobile communication terminal 10 together, and the asynchronous switch 220 according to the information indicates whether handover between neighbor cells in the asynchronous mobile communication system. Or, it is determined whether the handover is made to the synchronous mobile communication system 30. The handover request message (IU Reloc Required) transmitted by the RNC to the asynchronous exchange 220 is a message type, a handover type, a handover cause, a source base station controller ID, a target base station controller ID, and a RAB (as shown in FIG. 3). Radio access bearer) information and radio section related information.

Upon receiving the handover request message, the asynchronous exchange 220 transmits an asynchronous message requesting a handover to the interoperation operation unit 60 (MAP Prep Handover Req) (S102). At this time, the expansion container is added to the asynchronous message to transmit the asynchronous identification number (MSISDN) of the mobile communication terminal 10, and this message is an Invoke ID, a target cell ID, a target wireless network as shown in FIG. Parameters such as controller ID, MSISDN, and the like are included.

Thereafter, the interoperation operation unit 60 refers to the asynchronous subscriber information (MSISDN) received from the asynchronous switch 220, and requests the subscriber information to be transmitted to the dual stack home location register 50 (Call Data Request). (S103). That is, to request the synchronization network identifier (MIN, ESN) of the mobile communication terminal 10. In operation S103, the interoperation operation unit 60 may request the subscriber's synchronization network identifier information using the asynchronous message MAP_SEND_IMSI to the dual stack home location register 50.

The dual stack home location register 50 receiving the subscriber information request from the interlocking operation unit 60 searches the database, extracts the subscriber's synchronization network identifier information (MIN, ESN), and transmits the information to the interoperation operation unit 60. (Call Data Req Ack) (S104), and the interlocking operation unit 60 that receives this instructs the handover to the synchronous exchange 320 (Facilities Directive2) (S105), and the synchronous exchange 320 is a base station controller / A handover request is made to the base station 310 (Handoff Request) (S106). Here, the call network request (Call Data Request) for requesting the subscriber's sync network identifier information includes a parameter such as billing ID, digit (ie, MSISDN), as shown in FIG. 5A, and the response message (Call). Data Req Ack) includes parameters such as ESN, MIN, MSCID, and the like.

On the other hand, when the asynchronous message (MAP_SEND_IMSI) is used to request the subscriber's synchronization network identifier information, the types of parameters included in this message are shown in FIG. 5B.

As described above, the interlocking operation unit 60 generates a billing ID and includes the billing ID in the handover instructions message (Facilities Directive2) before transmitting the handover instructions message (Facilities Directive2) to the synchronization exchanger 320. The internal exchange circuit ID (InterMSCCircuitID) per handover section is transmitted. Here, the billing ID includes ID information of the synchronous exchange 320 to be connected to the asynchronous exchange 220.

The base station / base station controller 310 receiving the handover request from the switch 320 transmits a null frame to the synchronous modem unit of the mobile communication terminal through the forward traffic channel. The base station / base station controller 310 transmits a response message (Handoff Request Ack) to the switch 320 (S108). In addition, the exchange 320 transmits a response message (Facilities Directive2 Ack) to the handover instruction to the interoperation operation unit 60 (S109), and the interoperation operation unit 60 transmits the step S102 to the asynchronous exchange unit 220. In step S110, a response message (MAP Prep Handover Resp) for a handover request is transmitted. Accordingly, the relay line between the asynchronous exchange 220 and the synchronous exchange 320 is set.

In more detail, the interoperation operation unit 60 establishes a mapping relationship between a date channel, which is a logical trunk line setting identifier, and a physical trunk line, and sets this information to an internal exchange circuit of a handover request message (Facilities Directive2). It is set to ID (InterMSCCircuitID) and transmitted to the synchronous exchange 320. When a response message (Facilities Directive2 Ack) is transmitted from the synchronous exchange 320, a relay line is established between the asynchronous exchange 220 and the synchronous exchange 320. . The handover request message (Facilities Directive2) transmitted / received between the interlocking operation unit 60 and the synchronous exchange 320 includes parameters such as billing ID, ESN, internal exchange circuit ID, MIN, and the like, as shown in FIG. The response messages (Facilities Directive2 Ack) include parameters such as CDMA channel data, CDMA channel list, and the like.

As such, after the exchange period relay line is established, the asynchronous exchange 220 reports to the node B / RNC 210 that resource allocation for handover is completed (IU Relocation Command) (S111), and receives the node B / The RNC 210 requests to perform handover to the asynchronous modem unit of the mobile communication terminal 10 (Handover from UTRAN Command) (S112). Here, the message (IU Relocation Command) reporting that the resource allocation is completed includes parameters such as a message type, an RRC container, and a RAB list to be released as shown in FIG. 7.

Thereafter, the asynchronous modem unit of the mobile communication terminal transmits channel assignment information to the synchronous modem unit (Channel Assignment) (S113), and the synchronous modem unit notifies that the connection with the synchronous mobile communication system is completed (Call Connection) (S114). .

Next, the interoperation operation unit 60 requests an access signal to the asynchronous exchange 220 (MAP Process Access Signaling Req) (S115), where the access signal is an invoke ID, an application protocol data unit (APDU), and the selected radio. Resource information and the like, and a detailed parameter list is shown in FIG. 8.

In addition, the synchronous modem unit of the mobile communication terminal transmits frames and preambles through the reverse traffic channel to the base station / base station controller 310 of the synchronous mobile communication system (Reverse Traffic Channel Frames or Traffic Channel Preamble) (S116), handover The base station / base station controller 310 receives the response signal (BS Ack Order) (S118).

The base station / base station controller 310 then reports to the switchboard 320 that the handover has been completed (Handoff Complete) (S119), and the switchboard 320 notifies the interoperation operator 60 that the handover has been completed ( Mobile On Channel) (S120), by requesting the interoperation operation unit 60 that receives it to release the connection to the asynchronous exchange 220 (MAP Send End Signal Req) (S121), the asynchronous exchange 220 and the node The connection is released between the B / RNC (IU Release Command, IU Release Complete) (S122, S123).

Here, the handover completion message (Mobile On Channel) transmitted by the exchange 320 to the interoperation operation unit 60 is written as shown in FIG. 9, and the interoperation operation unit 60 is transmitted to the asynchronous exchange 220. The MAP Send End Signal Req includes a parameter as shown in FIG. 10. In addition, a message (IU Release Command, IU Release Complete) transmitted and received for disconnection between the asynchronous exchange 220 and the Node B / RNC is prepared as shown in FIGS. 11 and 12, respectively.

After the handover from the asynchronous mobile communication system to the synchronous mobile communication system for the voice call is completed by the above-described procedure, the call release process will be described. The call release may be requested first from the subscriber's mobile communication terminal in the asynchronous mobile communication system area or from the subscriber's mobile communication terminal handing over to the synchronous mobile communication system area.

Even if a call release request is received from either side, the exchange 220 or 320 receiving the call release request transmits a call release request message (Facilities Release) to the interoperation unit 60, and the interoperation unit 60 In response, the relay line, which was set during the exchange period, is released. Here, the call release request message (Facilities Release) includes parameters such as internal MSC circuit ID, release reason, billing ID, MIN, etc., as shown in FIG. 13, and the response message (Facilities Ack) includes a billing ID, etc. It contains the same parameters.

In the present invention, the asynchronous exchange determines whether the handover in the asynchronous mobile communication system or the handover to the synchronous mobile communication system according to the handover request of the RNC. In addition, when the handover to the synchronous mobile communication system is confirmed, the interlocking operation unit (IIF) is used as a converter so that the handover can be performed while transmitting and receiving a message with an exchange of the synchronous mobile communication system. Synchronous mobile communication system information should be built and stored in database in advance.

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 equivalents should be construed as being included in the scope of the present invention. do.

As described above, the present invention provides a disconnection when the asynchronous mobile communication system overlaps the synchronous mobile communication system and the dual band dual mode mobile communication terminal moves from the asynchronous mobile communication system area to the synchronous mobile communication system area during a voice call. By making a handover without a phenomenon, it is possible to overcome the service gap between generations and provide high quality service.

In addition, since the asynchronous mobile communication system does not need to be implemented unnecessarily over a large area, the investment cost required for the design of the asynchronous mobile communication system can be reduced.

Claims (16)

In a mobile communication system including a Node B, a wireless network controller, and an asynchronous exchange, and a synchronous mobile communication system including a base station, a base station controller, and a synchronous exchange, the asynchronous mobile communication system and the synchronous mobile communication system A mobile communication system that enables handover during a voice call of a dual band dual mode mobile communication terminal capable of communicating with The asynchronous exchange and the synchronous exchange are interconnected by an interlocking operating unit, the asynchronous exchange and the synchronous exchange are each connected to a dual stack home position register, The dual stack home location register stores and manages asynchronous subscription information and synchronous subscription information of the mobile communication terminal. The interlocking operation unit stores and manages the synchronous mobile communication system information, receives synchronous subscription information of the mobile communication terminal from the home location register according to a handover request of the asynchronous exchange, and synchronizes system information to the synchronous exchange. And transmitting the synchronous subscription information of the mobile communication terminal and receiving a response from the synchronous exchange so that a relay line is established during the synchronous exchange period with the asynchronous exchange, and the mobile communication terminal and the synchronous mobile communication system are connected to the synchronous exchange. And a non-synchronized network capable of handover of the mobile communication terminal and the synchronous network, characterized in that the mobile terminal is requested to release the radio connection when the handover is completed. The method of claim 1, The radio network controller requests a handover to the asynchronous exchange including neighbor base station information, and the asynchronous exchange responds to a handover request from the radio network controller, whereby the handover request is a hand in an asynchronous mobile communication system. And an asynchronous network capable of handover of the mobile communication terminal and a synchronous network, wherein the mobile communication terminal determines whether the mobile terminal is over or is handovered to the synchronous mobile communication system. The method of claim 1, The synchronous mobile communication system information stored in the interoperation unit includes switching information, signal points, and handover target cell information, and a billing ID including an ID of an exchange to be handed over using the synchronous mobile communication system information. A mobile communication system in which an asynchronous network and a synchronous network capable of handover of a mobile communication terminal are mixed. The method of claim 1, The interlocking operation unit transmits a parameter including a billing ID, an ESN / MIN of the mobile communication terminal, and an internal exchange circuit ID to the synchronous exchange to establish a relay line between the asynchronous exchange and the synchronous exchange, and synchronizes from the synchronous exchange. A mobile communication system in which an asynchronous network and a synchronous network capable of handover of a mobile communication terminal are received, characterized in that receiving parameters including channel data and code channel list. In a mobile communication system including a Node B, a wireless network controller, and an asynchronous exchange, and a synchronous mobile communication system including a base station, a base station controller, and a synchronous exchange, the asynchronous mobile communication system and the synchronous mobile communication system A handover method during a voice call of a dual-band dual mode mobile communication terminal capable of communicating with a mobile communication terminal, wherein the asynchronous exchange and the synchronous exchange are interconnected by an interoperation unit, and the asynchronous exchange and the synchronous exchange are respectively connected to a dual stack home location register. Connected, Transmitting, by the radio network controller, a handover request message to the asynchronous exchange according to a handover request of the mobile communication terminal; Sending, by the asynchronous exchange, a handover request message to the interoperation manager; Requesting and receiving subscriber information transmission of the mobile communication terminal to the dual stack home location register by the interoperation operation unit; The interoperation operator instructing a handover to the synchronous exchange, and the synchronous exchange requesting a handover to the base station controller / base station; Assigning, by the base station / base station controller, an omnidirectional traffic channel to the mobile communication terminal, and transmitting a response message to the handover request to the synchronous exchange; The synchronous exchange transmits a response message for a handover instruction to the interoperation operator, and the interoperation operator transmits a response message for a handover request to the asynchronous exchange, thereby establishing a relay line between the asynchronous exchange and the synchronous exchange. Becoming; Reporting, by the asynchronous exchange, that resource allocation for handover has been completed to the radio network controller; The radio network controller instructing handover to the mobile communication terminal through the node B; Switching, by the mobile communication terminal, to a synchronous mobile communication system access mode; Transmitting, by the interoperation operator, an access signal to the asynchronous exchange; Sending, by the mobile communication terminal, a frame and a preamble through a reverse traffic channel to the base station / base station controller and reporting that handover is completed; Reporting, by the base station / base station controller, that the handover is complete to the synchronous exchange, and notifying the interoperation operator that the handover is complete; And Requesting the interoperation manager to release the connection to the asynchronous exchange, thereby disconnecting the connection between the asynchronous exchange and the NodeB / Wireless Network Controller; Handover method comprising a. The method of claim 5, The step of transmitting a handover request message to the asynchronous exchange by the wireless network controller may include a handover related message used in the synchronous mobile communication system, neighbor cell information of the mobile communication terminal, neighbor base station information, handover type, And transmitting a handover request message including a parameter including a handover cause, a source base station controller ID, a target base station controller ID, RAB information, and radio section related information. The method of claim 6, The asynchronous exchange further comprises determining whether the handover in the asynchronous mobile communication system or the handover to the synchronous mobile communication system by referring to the neighbor cell information and the neighbor base station information of the mobile communication terminal. The method of claim 5, In the step of the asynchronous exchange to send a handover request message to the interoperation operation unit, handover method characterized in that it also transmits asynchronous identification number (MSISDN) of the mobile communication terminal. The method of claim 5, The subscriber information received from the dual stack home location register by the interoperation manager includes a synchronization network identifier (MIN, ESN) of the mobile communication terminal. The method of claim 5, And requesting subscriber information of the mobile communication terminal to the dual stack home location register by the interoperation manager using one of a synchronous message and an asynchronous message. The method of claim 5, The interlocking operation unit generates a billing ID including the ID information of the synchronous exchange to be connected to the asynchronous exchange before transmitting the handover instruction message to the synchronous exchange, and transmits the generated billing ID in the handover instruction message. A handover method comprising transmitting with an internal exchange circuit ID (InterMSCCircuitID) for each over interval. The method of claim 5, The handover request message transmitted by the interoperation manager to the synchronous exchange includes a parameter including a billing ID, an ESN, an internal exchange circuit ID, and a MIN, and the response message sent by the synchronous exchange to the interoperation manager is CDMA. And a parameter including a channel data and a CDMA channel list. The method of claim 5, In the step of the asynchronous exchange transmitting a resource allocation complete message to the radio network controller, the resource allocation complete message further comprises a parameter including a message type, an RRC container, and a list of RABs to be released. . The method of claim 5, The access signal includes an invoke ID, an application protocol data unit (APDU), and selected radio resource information. The method of claim 5, After the step of disconnecting the connection between the asynchronous exchange and the Node B / wireless network controller, The exchange receiving the call release request transmits a call release request message to the interoperation unit as the call release request is received from an incoming or outgoing mobile communication terminal, and the interoperation operator transmits the call release request message. And a relay line set during the asynchronous exchange and the synchronous exchange period is released as a response message is transmitted. The method of claim 15, The call release request message includes a parameter including an internal MSC circuit ID, release reason, billing ID, and MIN, and the response message transmitted by the interoperation manager to the exchange that sent the call release request message includes a billing ID. Handover method comprising a parameter comprising.

Images