KR20050090926A - Method for handover of mobile communication terminal during termination alerting in mixed mobile communication system of asynchronous communication network and synchronous communication network - Google Patents

Abstract

We present a handover method during incoming alerting using the interworking operation unit and the exchange period message transmission protocol in a mobile communication system in which asynchronous and synchronous networks are mixed.

According to the handover method of the present invention, when the interlocking operation unit receives subscriber information and instructs handover to a synchronous exchange according to a handover request of an incoming alerting mobile communication terminal, the synchronous exchange requests a handover to the base station controller / base station. The base station / base station controller assigns an omnidirectional channel to the mobile communication terminal, and then a relay line is established between the asynchronous / synchronous exchanges, a trunk is established between the asynchronous / synchronous exchanges, and the asynchronous exchange allocates resources to the wireless network controller. Reporting that the data transmission is completed, instructing the wireless network controller to handover to the mobile communication terminal, releasing a connection between the asynchronous and synchronous mobile communication systems when the mobile communication terminal transmits reverse traffic and reports that the handover is completed. As the mobile terminal responds to alerting, the mobile communication terminal transmits the To notify the include the step of call setup is to occur.

According to the present invention, it is possible to overcome service gaps between generations and provide high quality services, and to reduce the investment cost required to implement an asynchronous mobile communication system.

Description

Method for Handover of Mobile Communication Terminal During Termination Alerting in Mixed Mobile Communication System of Asynchronous Communication Network and Synchronous Communication Network}

The present invention relates to a handover method in a mobile communication network, and more particularly, an interlocking operation unit and an exchange period message transmission for signal exchange of an asynchronous exchange and a synchronous exchange period in a mobile communication system in which an asynchronous network and a synchronous network are mixed. The present invention relates to a handover method during incoming alerting of a mobile communication terminal using a protocol (ISUP).

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. In addition, such handover needs to be supported not only when the mobile communication terminal is busy but also when incoming call alerting is performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. As the call is received in the asynchronous mobile communication system area and the mobile communication terminal being alerted moves to the synchronous mobile communication system area, the interworking of the asynchronous exchange and the synchronous exchange period is performed. There is a technical problem in that the handover can be performed by using the interoperation unit of the operation unit and the synchronization exchange period and the ISUP.

The present invention for achieving the above-described technical problem is a mobile communication system in which the asynchronous mobile communication system including a Node B, a wireless network controller, an asynchronous exchange, and a synchronous mobile communication system including a base station, a base station controller, a synchronous exchange And the asynchronous exchange and the synchronous exchange are interconnected by an interlocking operation unit, and the asynchronous exchange and the synchronous exchange are each connected to a dual stack home location register and are capable of communicating with the asynchronous mobile communication system and the synchronous mobile communication system. A handover method during incoming alerting of a dual mode mobile communication terminal, comprising: transmitting, by the wireless 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 unit, wherein the mobile communication terminal is in an incoming alert state; Requesting and receiving subscriber information transmission of the mobile communication terminal to the dual stack home location register by the interoperation operation unit; Transmitting, by the interlocking operation unit, a handover instruction message to the synchronous exchange, the handover indication message including the incoming alert state, wherein the synchronous exchange requests 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; The asynchronous exchange transmitting an initial address message to the interoperation operation unit and receiving a response thereto, thereby establishing a trunk between the asynchronous exchange and the synchronous exchange; 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; Releasing a connection between the asynchronous mobile communication system and the synchronous mobile communication system; The base station / base station controller notifying that the mobile communication terminal is connected to the synchronization exchange as the incoming communication terminal responds to the alerting; Sending, by the synchronous exchange, an intersystem response message to the interoperation operator, and reporting that the mobile communication terminal has connected to the asynchronous exchange in response to alerting; And transmitting, by the interoperation operation unit, a response signal to the intersystem response message to the synchronous exchange.

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, and is a type 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, a method of handover during incoming alerting by the mobile communication terminal 10 located in the asynchronous mobile communication system 20 region will be described with reference to FIG. 2 as follows.

2 is a view for explaining the concept of handover during incoming alerting between the asynchronous network and the synchronous network according to the present invention. For convenience of description, the mobile communication terminal is a source mobile communication terminal 10a and a destination mobile communication terminal 10b. The description will be divided into).

When the terminating mobile communication terminal 10b is in the incoming alert state through the Node B / RNC 210 according to the originating attempt of the originating mobile communication terminal 10a in the area A of the asynchronous mobile communication system 20 When the terminating mobile communication terminal 10b moves to the boundary area C with the area B of the synchronous mobile communication system 30, the terminating mobile communication terminal 10b is a node of the asynchronous mobile communication system 20. Requesting handover to B, Node B requests handover to the asynchronous exchange 220 via the RNC.

Accordingly, a handover procedure between the asynchronous mobile communication system 20 and the synchronous mobile communication system 30 for the incoming mobile communication terminal 10b is started, and the handover is completed, so that the asynchronous switch 220 and the synchronous switch 320 are completed. Is connected through the interlocking operation unit 60, outgoing alerting by the outgoing mobile communication terminal 10a is the incoming mobile communication terminal 10b through the BTS / BSC 310 of the synchronous mobile communication system 30 Is sent to.

For handover during the incoming alert, the mobile communication terminal 10 periodically measures the signal strength of the NodeB and the neighboring base station and reports it to the NodeB. When the signal strength with the NodeB falls below a specified threshold, NodeB reports a handover event has occurred to the asynchronous exchange 220 via the RNC. 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. It is determined whether or not the handover is performed.

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. In addition, the IIF 60 establishes a trunk between the asynchronous exchanger 220 and the synchronous exchange 320, so that message exchange for handover is performed through ISUP, which is a message transfer protocol during the exchange period.

The handover procedure of the incoming alert is described in more detail with reference to FIG. 3 as follows.

3A and 3B are flowcharts illustrating a handover method from an asynchronous network to a synchronous network during incoming alerting of a mobile communication terminal according to the present invention. In FIGS. 3A and 3B, the asynchronous modem unit and the synchronous modem unit are called mobile communication terminals. Means component of.

As the mobile communication terminal 10b which has been incoming alerting in the asynchronous mobile communication system 20 area gradually moves to the synchronous mobile communication system 30 area and is located in an area where the asynchronous network area and the synchronous network area overlap, The communication terminal 10b detects a signal from the synchronous mobile communication system 30 and periodically measures the signal strength from the Node B of the asynchronous mobile communication system 20 and the signal strength with the neighboring base station (or Node B). Measure and report to NodeB. Accordingly, when the Node B, which is currently connected to the mobile communication terminal 10b, confirms that the signal strength between the mobile communication terminal 10b and the Node B is equal to or less than 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) and neighbor cell information received from the mobile communication terminal 10b together to the asynchronous switch 220, and the asynchronous switch 220 according to this information. It is determined whether or not handover is performed between adjacent cells in the cell or handover 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, handover type, handover cause, source base station controller ID, target base station controller ID, RAB ( Radio access bearer) information and radio section related information. In addition, the RNC additionally transmits the handover related information used in the synchronous mobile communication system to the Old BSS To New BSS Information parameter included in the handover request message, and the detailed list is shown in FIG. 4B.

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). In this case, by adding an extension container to the asynchronous message, the asynchronous identification number (MSISDN) of the mobile communication terminal 10b and the mobile communication terminal 10b must be transmitted together with the incoming alert state. The state of the mobile communication terminal 10b should be indicated using a parameter included in Prep Handover Req. This message (MAP Prep Handover Req) includes parameters such as Invoke ID, Target Cell ID, Target Radio Network Controller ID, MSISDN and the like as shown in FIG.

Subsequently, the interoperation operation unit 60 refers to the asynchronous subscriber information (MSISDN) received from the asynchronous exchange 220, and requests to transmit subscriber information 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 (10b). 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). 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. 6A, 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 the message are shown in FIG. 6B.

Receiving the subscriber information from the dual stack home location register 50, the interlocking operation unit 60 instructs the handover to the synchronization switch 320 (Facilities Directive2) (S105), the synchronization switch 320 is the base station controller Request handover to the base station 310 (Handoff Request) (S106).

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 switch includes an internal exchange circuit ID (InterMSCCircuitID) for each handover section. 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 may include parameters such as billing ID, ESN, internal exchange circuit ID, MIN, handoff state, and the like, as shown in FIG. In particular, the Handoff State parameter is set to an identifier indicating that the incoming alert state, and the response message (Facilities Directive2 Ack) includes parameters such as CDMA channel data, CDMA channel list and the like.

Subsequently, the asynchronous exchange 220 transmits an initial address message (IAM), which is an initial address message, to the interoperation operation unit 60, and the interoperation operation unit 60 transmits an address completion message (ACM) as a response thereto. By doing so, the trunk setup is made between the asynchronous exchange 220 and the synchronous exchange 320, whereby the call is routed (S111, S112). The exchange duration message for trunk establishment is sent and received by the ISUP.

As such, after the switching period relay line and trunk are established, the asynchronous exchange 220 reports that the resource allocation for handover is completed to the Node B / RNC 210 (IU Relocation Command) (S113), and the node receiving the same. The B / RNC 210 requests to perform handover to the asynchronous modem unit of the mobile communication terminal 10b (Handover from UTRAN Command) (S114). Here, the message (IU Relocation Command) reporting that the resource allocation is completed includes parameters such as message type, RRC container, RAB list to release, and the like as shown in FIG. 8A. In addition, the handover message (HDM) is transmitted using the L3 Information parameter of the resource allocation completion report message, and a detailed parameter list is shown in FIG. 8B.

Subsequently, the asynchronous modem unit of the mobile communication terminal transmits channel assignment information to the synchronous modem unit (Channel Assignment) (S115), and the interoperation operation unit 60 requests an access signal to the asynchronous exchanger 220 (MAP Process Access Signaling). Req) (S116), the access signal includes an invoke ID, an application protocol data unit (APDU), selected radio resource information, etc. A detailed parameter list is shown in FIG.

In addition, the synchronous modem unit of the mobile communication terminal transmits a frame or preamble 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) (S117), handover The base station / base station controller 310 receives the response signal (BS Ack Order) (S119). Then, the synchronous modem unit notifies the asynchronous modem unit that the connection with the synchronous mobile communication system is completed (Call Connection) (S120).

Subsequently, the base station / base station controller 310 reports that the handover is completed to the switch 320 (Handoff Complete) (S121), and the switch 320 notifies the interoperation operation unit 60 that the handover is completed. (Mobile On Channel) (S122), the interlocking operation unit 60 receives the request to release the connection to the asynchronous exchange 220 (MAP Send End Signal Req) (S123).

In addition, the interlocking operation unit 60 transmits a message indicating that the synchronous switch 320 and the mobile communication terminal are connected to the asynchronous switch 220 (ANSWER) (S124), the asynchronous switch 220 and the node B / RNC The connection is released (IU Release Command, IU Release Complete) (S125, S126).

Here, the handover complete message (Mobile On Channel) that the exchange 320 transmits to the interoperation operation unit 60 includes a parameter as shown in FIG. 10, and the interoperation operation unit 60 includes an asynchronous exchange ( The MAP Send End Signal Req transmitted to 220 includes the parameters as shown in FIG. 11. In addition, messages (IU Release Command, IU Release Complete) transmitted and received for disconnection between the asynchronous exchange 220 and the Node B / RNC are written as shown in FIGS. 12 and 13, respectively.

When the handover to the synchronous mobile communication system for the incoming mobile communication terminal is completed by the procedure described above, the calling terminal-asynchronous exchange-interoperation operation unit-synchronous exchange-incoming mobile communication in the asynchronous mobile communication system area is completed. Call setup is made between terminals.

Then, when the incoming mobile communication terminal completes the handover, the base station / base station controller 310 reports it to the switch 320 (Connect) (S127), the switch 320 is the interoperation operation unit 60 In step S128, an intersystem answer message is transmitted to notify that the called mobile communication terminal has responded. Subsequently, the interlocking operation unit 60 transmits an access signal to the asynchronous exchange 220 (MAP Process Access Signaling Req) (S129) to notify that the terminating mobile communication terminal has responded, while interlocking the system 320 to the synchronous exchange 320. The response message (Intersystem Answer Ack) for the response message is transmitted (S130).

The intersystem answer message includes parameters such as an internal MSC circuit ID, MIN, ESN, and the like as shown in FIG.

After the handover from the asynchronous mobile communication system to the synchronous mobile communication system for the incoming alert is completed by the procedure described above, after the call is initiated between the caller and the called party in response to the incoming mobile communication terminal, the call is released. The process is as follows.

The call release may be requested first from the subscriber's mobile communication terminal in the asynchronous mobile communication system area or first from the subscriber's mobile communication terminal handed over to the synchronous mobile communication system area. A case in which a subscriber's mobile communication terminal requests call release is described.

As the mobile communication terminal releases the call, the call between the asynchronous switch 220 and the synchronous switch 320 is released (Call Release) (S131), and the trunk connection between the switch is released (Release) (S132). Thereafter, the asynchronous exchange 220 reports that the disconnection is completed to the interlocking operation unit 60 (MAP Send End Signal Resp) (S133), the interlocking operation unit 60 is called to the synchronous exchange (320). The release request message (Facilities Release) is transmitted (S134), and as the synchronous exchange 320 receiving the message responds thereto (Facilities Ack), the relay line set up in the exchange period is released (S135). 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. 15, and the response message (Facilities Ack) includes a billing ID, etc. It contains the same parameters.

In the present invention, as the mobile communication terminal located in the asynchronous area moves from the incoming alert state to the synchronous network area, the RNC requests a handover to the asynchronous exchange, and whether the asynchronous exchange is a handover in the asynchronous mobile communication system. Determine whether handover to a synchronous mobile communication system. In addition, when it is confirmed that the handover to the synchronous mobile communication system is performed, the handover is performed while the interworking operation unit (IIF) is used as a converter and the message is exchanged with the exchange of the synchronous mobile communication system using ISUP, which is a message exchange protocol. In this case, the mobile communication terminal to be handed over is notified of an incoming alert state.

When the handover to the synchronous mobile communication system is completed and the mobile communication terminal in the incoming alert state responds, the synchronous exchange sends an intersystem response message to the interlocking operation unit to notify that the mobile communication terminal has responded to the alerting. Allow the over to be completed completely.

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, 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 incoming alerting, By performing handover by using the interoperation unit for message exchange of a period and ISUP which is a message transmission protocol of a period of exchange, 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.

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

2 is a view for explaining the concept of handover during incoming alert between asynchronous network and synchronous network according to the present invention;

3A and 3B are flowcharts illustrating a handover method between an asynchronous network and a synchronous network according to the present invention;

4 to 15 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

Claims (14)

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 exchange and the synchronous exchange interoperate. Connected to each other, and the asynchronous exchange and the synchronous exchange are connected to a dual stack home location register, respectively, and the incoming call of the dual band dual mode mobile communication terminal capable of communicating with the asynchronous mobile communication system and the synchronous mobile communication system. As an over method, 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 unit, wherein the mobile communication terminal is in an incoming alert state; Requesting and receiving subscriber information transmission of the mobile communication terminal to the dual stack home location register by the interoperation operation unit; Transmitting, by the interlocking operation unit, a handover instruction message to the synchronous exchange, the handover indication message including the incoming alert state, wherein the synchronous exchange requests 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; The asynchronous exchange transmitting an initial address message to the interoperation operation unit and receiving a response thereto, thereby establishing a trunk between the asynchronous exchange and the synchronous exchange; 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; Releasing a connection between the asynchronous mobile communication system and the synchronous mobile communication system; The base station / base station controller notifying that the mobile communication terminal is connected to the synchronization exchange as the incoming communication terminal responds to the alerting; Sending, by the synchronous exchange, an intersystem response message to the interoperation operator, and reporting that the mobile communication terminal has connected to the asynchronous exchange in response to alerting; And Transmitting, by the interoperation operation unit, a response signal to the intersystem response message to the synchronous exchange; Handover method comprising a. The method of claim 1, In the step of establishing a trunk between the asynchronous exchange and the synchronous exchange, the asynchronous exchange transmits an initial address message (IAM), which is an ISUP message, to the interoperable operating unit, and the interoperable operating unit is an ISUP message to the asynchronous exchange. Handover method characterized in that by transmitting a Completion Message). The method of claim 1, The step of releasing the connection between the asynchronous mobile communication system and the synchronous mobile communication system, the base station / base station controller reports that the handover is completed to the exchange, the exchange is notified that the handover is completed to the interoperation operation unit. Process of doing; Requesting that the interoperation manager releases the connection to the asynchronous exchange, and reporting that the synchronous exchange and the mobile communication terminal are connected by using an ISUP message; And Disconnecting a connection between the asynchronous exchange and a Node B / wireless network controller; Handover method comprising a. The method of claim 1, 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 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 4, wherein 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 1, 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 1, The subscriber information received by the interoperation manager from the dual stack home location register includes a synchronization network identifier (MIN, ESN) of the mobile communication terminal. The method of claim 1, 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 1, 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 1, 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 1, 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 1, The access signal includes an invoke ID, an application protocol data unit (APDU), and selected radio resource information. The method of claim 1, After the incoming communication terminal completes the handover and responds to the alerting, As a call release request is received from an incoming or outgoing mobile communication terminal, the exchange receiving the call release request transmits a trunk connection release and call release request message to the interoperation operator, and the interoperation operator responds thereto. And the relay line set during the asynchronous exchange and the synchronous exchange period is released. The method of claim 12, And the call release request message includes a parameter including an internal MSC circuit ID, a release reason, a billing ID, and a MIN, and the response message includes a parameter including a billing ID.