KR100589945B1 - Method for Acquirement of Synchronous Communication Network Information in Mixed Mobile Communication System of Asynchronous Communication Network and Synchronous Communication Network - Google Patents

Abstract

We propose a system information acquisition method for continuously providing asynchronous network and synchronous network services in a mobile communication system in which asynchronous and synchronous networks are mixed.

According to the present invention, the asynchronous mobile communication system and the interoperable operating unit installed in the exchange period of the synchronous mobile communication system acquire the database of the synchronous mobile communication system, and the asynchronous exchange is connected to the synchronous mobile communication system to the synchronous mobile communication system. When the event generation information is transmitted, the interoperation manager selects the connection target synchronous exchange by referring to the event occurrence information received from the database and the asynchronous exchange, generates a billing ID by referring to the connection target synchronous exchange information and the database, The interlocking operation unit checks the signal point information of the exchange to be connected and transmits a message to the signal point to establish a dedicated channel so that the asynchronous exchange and the synchronous exchange are connected.

According to the present invention, it is possible to provide a continuous service in a wireless environment where generational mobile communication systems overlap.

Asynchronous mobile communication system, synchronous mobile communication system, IIF, system information

Description

{Method for Acquirement of Synchronous Communication Network Information in Mixed Mobile Communication System of Asynchronous Communication Network and Synchronous Communication Network}

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

2 is a flowchart illustrating a method of obtaining system information according to the present invention;

3 is a flowchart illustrating an application example of a method for obtaining system information 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 method for acquiring mobile communication system information, and more particularly, to a method for acquiring a synchronous mobile communication system information for continuously providing asynchronous network and a synchronous network service in a mobile communication system in which an asynchronous network and a synchronous network are mixed. will be.

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 handover should be performed when the subscriber of the asynchronous mobile communication system moves to the synchronous area while using the service in the asynchronous area.

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.

Therefore, when asynchronous network and a synchronous network such as handover need to perform a service, there is a need for a method for asynchronous mobile communication system to acquire synchronous mobile communication system information.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and stores and manages synchronous mobile communication system information in an asynchronous mobile communication system, and asynchronously according to the stored synchronous mobile communication system information when a connection request to the synchronous mobile communication system occurs. There is a technical problem in that a mobile communication system and a synchronous mobile communication system can be easily connected to enable continuous service between different generations of systems.

According to the present invention, the asynchronous mobile communication system and the interoperable operating unit installed in the exchange period of the synchronous mobile communication system acquire the database of the synchronous mobile communication system, and the asynchronous exchange is connected to the synchronous mobile communication system to the synchronous mobile communication system. When the event generation information is transmitted, the interoperation manager selects the connection target synchronous exchange by referring to the event occurrence information received from the database and the asynchronous exchange, generates a billing ID by referring to the connection target synchronous exchange information and the database, The interlocking operation unit checks the signal point information of the exchange to be connected and transmits a message to the signal point to establish a dedicated channel so that the asynchronous exchange and the synchronous exchange are connected.

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, and constructs and manages the synchronous mobile communication system information as a database.

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 the asynchronous mobile communication system subscription information of the DBDM mobile communication terminal 10 and the 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, as the mobile communication terminal 10 moves, an event may occur in which the asynchronous mobile communication system 20 and the synchronous mobile communication system 30 need to provide continuous service, and handover is performed. For example.

The mobile communication terminal 10 periodically measures the signal strengths of the base station and neighboring base stations that are currently communicating and reports them to the node B that is currently communicating. When the signal strength of the node B that is currently communicating decreases below a specified threshold, The NodeB reports that a handover event has occurred to the asynchronous switch 220 through the RNC, and the asynchronous switch 220 refers to the neighbor cell information, the base station ID, etc. received from the RNC, and the neighbor in the asynchronous mobile communication system 20. It is determined whether the inter-cell handover or the handover to the synchronous mobile communication system 30 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 of the present invention converts an asynchronous message into a synchronous message and transmits it to the synchronous exchange 320, and preconfigures and manages the synchronous mobile communication system information as a database, while the dual stack home location register 50 Request and receive the synchronous subscriber information of the mobile communication terminal 10 to perform the handover.

The synchronous mobile communication system information database managed by the IIF 60 includes switch information, signal points, relay channel information related to a dedicated channel, and the like. When the IIF 60 receives a system information acquisition request from the asynchronous exchange 220 in response to an event such as a handover request, the IIF 60 selects the connection target exchange 320 according to the synchronous mobile communication system information of the pre-established database. It generates a billing (Billing) ID, including a connection target exchange ID and the like used in the subsequent service process. Then, the signal point of the connection target exchange is confirmed, and a dedicated channel is established to transmit necessary data.

As such, the subscriber's synchronous mobile communication system information is required when providing an interconnected service between the asynchronous network and the synchronous network, including a handover from the asynchronous network to the synchronous network. Referring to FIG. As follows.

2 is a flowchart illustrating a method of obtaining system information according to the present invention.

The interlocking operation unit 60 of the present invention constructs, stores and manages the synchronous mobile communication system information as a database in order to provide a smooth connection service between the asynchronous mobile communication system and the synchronous mobile communication system (S101). The synchronous mobile communication system information stored in the database includes MSCIDs, signal points, relay channel information, and the like.

When the synchronous mobile communication system information is managed in the database as described above, when the event that the event should be connected to the synchronous network has been reported from the asynchronous exchange 220 (S102), the interoperation operation unit 60 to the database. The connection target synchronous exchange is selected with reference to the stored synchronous mobile communication system information and the event occurrence information transmitted from the asynchronous exchange 220 (S103). Here, the event occurrence information transmitted from the asynchronous exchange 220 to the interoperation operation unit 60 includes, for example, target ID information, target cell identifier information, and the like.

The interlocking operation unit 60 selects the connection target exchanger 320, generates a billing ID (S104), checks the signal point information of the connection target exchanger 320 (S105), and then returns to the corresponding signal point. A dedicated channel is established by transmitting a message, and when a response signal is transmitted from the synchronous exchange 320, a relay line is established between the asynchronous exchange 220 and the synchronous exchange 320 (S106).

Thereafter, by transmitting a voice or data signal through the relay line set in step S106 (S107), even if the mobile communication terminal moves to the synchronization network area, the continuous service can be made.

3 is a flowchart illustrating an application example of a method for acquiring system information according to the present invention and shows a handover process from an asynchronous network to a synchronous network.

As the mobile communication terminal gradually moves from the boundary area between the asynchronous network and the synchronous network to the synchronous mobile communication system area, the RNC requests a handover to the asynchronous switch 220 (IU Reloc Required) (S201). At this time, the RNC transmits the neighbor base station information (base station ID) and the neighbor cell information 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. In the present embodiment, a case of handover to the synchronous mobile communication system 30 will be described.

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) (S202). At this time, by adding an extension container to the asynchronous message, the asynchronous identification number (MSISDN) of the mobile communication terminal 10 is inquired from the visited subscriber registrar and transmitted together, and the target ID information and the target cell identifier information are transmitted together.

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). (S203). That is, to request the synchronization network identifier (MIN, ESN) of the mobile communication terminal 10. In step S203, the interlocking operation unit 60 may request the subscriber's synchronization network identifier information by 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) (S204).

Since the interlocking operation unit 60 of the present invention manages the synchronous mobile communication system information by using a database, it is connected with reference to the target ID information, the target cell identifier information, and the synchronous mobile communication system information received from the asynchronous exchange 320. Select the target exchange, generate a billing ID using it, and check the signal points of the target exchange. Then, a message channel is established by transmitting a message to the signal point, and a handover is instructed to the connection target synchronization switch 320 including the synchronization network identifier information received from the dual stack home location register in step S204 (Facilities). Directive2) (S205), the synchronization switch 320 requests a handover to the base station controller / base station 310 (Handoff Request) (S206).

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 is then assigned to the switch 320, and the switch 320 to the interoperation unit 60 responds to the handover instruction (Handoff Request Ack, Facilities Directive2). Ack) (S208, S209), the interlocking operation unit 60 transmits a response message (MAP Prep Handover Resp) to the asynchronous exchange 220 (S210). Accordingly, the relay line between the asynchronous exchange 220 and the synchronous exchange 320 is set.

As such, after the exchange period relay line is established, the asynchronous exchange 220 reports that the resource allocation for handover is completed to the node B / RNC 210 (IU Relocation Command) (S211), and receives the node B / The RNC 210 requests to perform a handover to the asynchronous modem unit of the mobile communication terminal 10 (Handover from UTRAN Command) (S212). Thereafter, the asynchronous modem unit of the mobile communication terminal transmits channel assignment information to the synchronous modem unit (Channel Assignment) (S213), and the synchronous modem unit notifies the asynchronous modem unit that the connection with the synchronous mobile communication system is completed (Call Connection) (S214). .

Next, the interoperation operation unit 60 requests an access signal to the asynchronous switch 220 (MAP Process Access Signaling Req) (S215), and the synchronous modem unit of the mobile communication terminal is a base station / base station controller ( In step 310, the frame and the preamble are transmitted through the reverse traffic channel (Reverse Traffic Channel Frames or Traffic Channel Preamble) (S216), the handover is completed (Handoff Completion Message) (S217), and the base station / The base station controller 310 transmits a response signal thereto (BS Ack Order) (S218).

The base station / base station controller 310 then reports to the exchange 320 that the handover has been completed (Handoff Complete) (S219), and the exchange 320 notifies the interoperation operator 60 that the handover has been completed ( Mobile On Channel) (S220), by requesting the interlocking operation unit 60 that receives it to release the connection to the asynchronous switch 220 (MAP Send End Signal Req) (S221), the asynchronous switch 220 and the node The connection is released between the B / RNC (IU Release Command, IU Release Complete) (S222, S223).

During the above-described handover procedure, the interlocking operation unit 60 selects the connection target exchange using the database in which the synchronous mobile communication system information is stored and the information received from the asynchronous exchange between the steps S202 to S204, and generates a billing ID. In addition, a process of establishing a dedicated channel may indicate a process of acquiring synchronous mobile communication system information.

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 manages the synchronous mobile communication system information as a database in an interoperable operation unit connected between the asynchronous exchange and the synchronous exchange, and reports that an event such as a handover has occurred from the asynchronous mobile communication system. By easily connecting the asynchronous mobile communication system and the synchronous mobile communication system with reference to the stored synchronous mobile communication system information, it is possible to provide a continuous service in a state where the mobile communication systems of different generations overlap.

Claims (3)

A Node B / wireless network controller, an asynchronous mobile communication system including an asynchronous exchange, a base station / base station controller, a synchronous mobile communication system including a synchronous exchange, an interoperation unit for allowing the asynchronous exchange and the synchronous exchange to be interconnected, A dual stack home location register connected to an asynchronous exchange and a synchronous exchange, respectively, for storing and managing asynchronous subscription information and synchronous subscription information of a dual band dual mode mobile communication terminal capable of communicating with the asynchronous mobile communication system and the synchronous mobile communication system. In the mobile communication network, as the method for acquiring the synchronous mobile communication system information, Acquiring and databaseting the synchronous mobile communication system information including the MSCID, signal point, and dedicated channel related relay line information of the synchronous mobile communication system; Transmitting, by the asynchronous exchange unit, handover event occurrence information to be connected to the synchronous mobile communication system to the interoperation unit; Selecting, by the interoperation manager, a connection target synchronous exchange by referring to event occurrence information received from the database and the asynchronous exchange; Generating, by the interoperation manager, a billing ID with reference to the access target synchronization switch information and the database; And Confirming signal point information of the access target exchange by referring to the database, and transmitting a message to the signal point to establish a dedicated channel; Method for acquiring synchronous mobile communication system comprising a. delete The method of claim 1, Event generation information transmitted from the asynchronous exchange to the interoperation unit comprises target ID information and target cell identifier information.

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