KR100589947B1 - Method for Processing of Radio Resource Information for Handover in Mixed Mobile Communication System of Asynchronous Communication Network and Synchronous Communication Network - Google Patents

Abstract

The present invention proposes a radio resource information processing method for continuously providing asynchronous network and synchronous network services in a mobile communication system in which an asynchronous network and a synchronous network are mixed.

The present invention is a method for processing radio resource information during handover between an asynchronous network and a synchronous network. When a wireless network controller of an asynchronous network requests a handover to an asynchronous exchange, a handover related message of a synchronous mobile communication system is added and transmitted. When the asynchronous exchange requests a handover to the interoperation unit, the handover related message of the synchronous mobile communication system is transmitted together.

According to the present invention, the asynchronous mobile communication system can know the wireless environment of the synchronous mobile communication system by the handover-related message of the synchronous mobile communication system. It can be prevented.

Asynchronous Mobile Communication System, Synchronous Mobile Communication System, IIF, Radio Resources

Description

Method for processing of radio resource information for handover in mixed mobile communication system of asynchronous communication network and synchronous network

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

2 is a view for conceptually explaining a radio resource information processing method according to the present invention;

3A and 3B are diagrams showing a parameter list included in a message for processing radio resource information according to the present invention;

4 is a flowchart illustrating an application example of a radio resource information processing 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 radio resource information processing method of a mobile communication system, and more particularly, to a radio resource information processing method for continuously providing an asynchronous network and a synchronous network service in a mobile communication system in which an asynchronous network and a synchronous network are mixed. It is about.

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.

Since the handover processing messages of the asynchronous mobile communication system and the synchronous mobile communication system are different when the handover procedure is performed, the handover request message of the asynchronous mobile communication system cannot be recognized by the synchronous mobile communication system. Therefore, there is a need to manage radio resources between an asynchronous mobile communication system and a synchronous mobile communication system for handover of a mobile communication terminal.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and when a handover is required from an asynchronous mobile communication system to a synchronous mobile communication system, a handover message used in a synchronous network is added to a handover message used in an asynchronous network. The technical challenge is to ensure seamless service between systems of different generations.

The present invention is a method for processing radio resource information during handover between an asynchronous network and a synchronous network. When a wireless network controller of an asynchronous network requests a handover to an asynchronous exchange, a handover related message of a synchronous mobile communication system is added and transmitted. When the asynchronous exchange requests a handover to the interoperation unit, the handover related message of the synchronous mobile communication system is transmitted together.

The asynchronous mobile communication system can know the wireless environment of the synchronous mobile communication system by the handover related message of the synchronous mobile communication system, and accordingly, the handover can be precisely performed to prevent a call disconnection phenomenon in the handover of the mobile communication terminal. do.

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, the mobile communication terminal 10 periodically measures the signal strength of the base station and neighboring base stations that are currently communicating and reports it to the node B that is currently communicating, and a threshold in which the signal strength of the node B that is currently communicating is specified. If the value falls below the value, the NodeB reports to the asynchronous exchange 220 via the RNC that a handover event has occurred.

When the Node B / RNC 210 requests a handover to the Asynchronous Switch 220, a Radio Access Network Application Part for a message exchange between the Node B / RNC 210 and the Asynchronous Switch 220 of the asynchronous mobile communication system. In this case, the asynchronous exchange 220 can refer to the wireless environment of the synchronous mobile communication system 30 by including a handover related message used in the synchronous mobile communication system 30.

The asynchronous exchange 220 determines whether the handover to the inter-cell inter-cell handover in the asynchronous mobile communication system 20 or the handover to the synchronous mobile communication system 30 with reference to the neighbor cell information, the base station ID and the like received from the RNC. 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. At this time, the handover message of the synchronous mobile communication system received from the Node B / RNC 210 is included in the handover request message transmitted to the interoperation operation unit 60 and transmitted, thereby synchronizing with the other asynchronous network generation. Handover between the networks is possible.

The IIF 60 converts the asynchronous message received from the asynchronous exchanger 220 into a synchronous message and transmits the same to the synchronous exchange 320, and constructs and manages the synchronous mobile communication system information as a database, while maintaining a dual stack home location register. To 50, request and receive the synchronous subscriber information of the mobile communication terminal 10 to perform the handover.

As such, when providing a service connected between the asynchronous network and the synchronous network, including a handover from the asynchronous network to the synchronous network, the asynchronous mobile communication system should check the wireless environment of the synchronous mobile communication system. A detailed description with reference to FIG. 2 is as follows.

2 is a view for conceptually explaining a radio resource information processing method according to the present invention.

Located in the area A of the asynchronous mobile communication system 20 and connected to the Node B / RNC 210 and the asynchronous switch 220, the mobile communication terminal 10 using the service moves to the synchronous mobile communication system 30. ) And the mobile communication terminal 10 requests a handover to the node B of the asynchronous mobile communication system 20, and the node B sends the RNC. Request a handover to the asynchronous exchange 220 through.

Accordingly, the handover procedure between the asynchronous mobile communication system 20 and the synchronous mobile communication system 30 for the mobile communication terminal 10 is started. When the handover is requested to the node B, the mobile communication terminal 10 Should transmit the synchronous mobile communication system 30 obtained by itself. In addition, when the Node B / RNC 210 requests a handover to the asynchronous switch 220, the handover of the synchronous mobile communication system is related to a RANAP message for message exchange between the Node B / RNC 210 and the asynchronous switch 220. The message must be sent and included.

The asynchronous RANAP message includes a message type, a handover type, a handover cause, a source ID, a target ID, and the like, and specifically includes a parameter as shown in FIG. 3A. In addition, the handover related message of the synchronous mobile communication system added to the RANAP message includes a cause of handover, a target cell identifier list, a classmark information type 2, and a transcode mode. ), A synchronization channel identifier (IS-95 Channel Identifier), and the like, specifically, a parameter as shown in FIG. 3B.

As such, when the handover request including the handover related message of the synchronous mobile communication system is received, the asynchronous exchange 220 instructs the handover to the interlocking operation unit 60. At this time, the asynchronous exchange 220 transmits the synchronous handover related message received from the RNC to the interlocking operation unit 60 together.

Upon receiving the handover request message including the synchronous handover message, the interoperation manager 60 obtains subscriber information from the dual stack home location register 50. Thereafter, the interlocking operation unit 60 performs handover to the switch 320 of the synchronous mobile communication system 30 with reference to the subscriber information acquired from the dual stack home location register 50 and the information received from the asynchronous switch 220. By requesting, the subsequent handover procedure proceeds.

4 is a flowchart illustrating an application example of a method for obtaining subscriber information according to the present invention, which shows a handover process from an asynchronous network to a synchronous network during a voice call of a mobile communication terminal.

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) (S101). This handover request message (IU Reloc Required) is an asynchronous RANAP message and includes a message type, a message type, a handover type, a cause of handover, a source ID, a target ID, and the like. In addition, in order to support handover to the synchronous mobile communication system 30, a handover related message of the synchronous mobile communication system is added to the RANAP message and transmitted. The handover related messages of the synchronous mobile communication system include a handover cause, a target cell identifier list, a classmark information type 2, a transcode mode, and a sync channel identifier (IS). -95 Channel Identifier) and the like. In addition, when the handover request, the RNC transmits neighbor base station information (base station ID) and neighbor cell information received from the mobile communication terminal 10 to the asynchronous exchange 220 together.

The asynchronous exchange 220 determines whether it is a handover between adjacent cells in the asynchronous mobile communication system or a handover to the synchronous mobile communication system 30 according to the information received from the RNC. 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) (S102). 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 register and transmitted together. In addition, in step S102, the synchronous handover related message received from the RNC is also transmitted. That is, the MAP Prep Handover Req message includes parameters such as Invoke ID, Target Cell ID, Target RNC ID, IMSI, MSISDN, AN-APDU, etc., among which the AN-APDU parameter is synchronized as shown in FIG. 3B. It is desirable to include a handover related message.

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 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).

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 indication (Handoff Request Ack, Facilities Directive2 Ack). ) (S108, S109), the interlocking operation unit 60 transmits a response message (MAP Prep Handover Resp) to the asynchronous exchange 220 (S110). 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 to the node B / RNC 210 that resource allocation for handover is completed (IU Reloc 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). 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 switch 220 (MAP Process Access Signaling Req) (S115), and the synchronous modem unit of the mobile communication terminal is the base station / base station controller of the synchronous mobile communication system ( In step 310, the frame and the preamble are transmitted through the reverse traffic channel (Reverse Traffic Channel Frames or Traffic Channel Preamble) (S116), the handover is completed (Handoff Completion Message) (S117), and the base station / The base station controller 310 transmits a response signal thereto (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).

In the above handover procedure, step S101 indicates a step in which the RNC transmits a handover related message of the synchronous mobile communication system to the asynchronous exchange, and step S102 indicates that the asynchronous exchange transmits a synchronous handover related message to the interoperation operator. . Accordingly, since the asynchronous mobile communication system can know the wireless environment of the synchronous mobile communication system, handover from the asynchronous network to the synchronous network is possible.

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

As described above, according to the present invention, when a wireless network controller requests a handover to an asynchronous exchange for handover from an asynchronous network to a synchronous network in a mobile communication system in which an asynchronous mobile communication system is superimposed on a synchronous mobile communication system. By transmitting a handover-related message of the mobile communication system together, and transmitting a handover-related message of the synchronous mobile communication system together when the asynchronous exchange requests a handover to the interoperation unit, the synchronization of the synchronous mobile communication system in the asynchronous mobile communication system. The wireless environment can be known, and accordingly, handover can be performed without disconnection between asynchronous and synchronous networks, thereby improving service quality.

Claims (4)

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 a mobile communication network, a method for processing radio resource information during handover of the mobile communication terminal, Transmitting, by the wireless network controller, the handover request from the mobile communication terminal, a handover request message including the synchronous mobile communication system handover message to the asynchronous exchange; Determining, by the asynchronous exchange, whether the handover request from the radio network controller is an inter-cell handover in an asynchronous mobile communication system or a handover to a synchronous mobile communication system; When the handover is a handover to a synchronous mobile communication system, the asynchronous exchange transmits a handover request message including the synchronous mobile communication system handover message to the interworking unit, and the interoperation manager performs the dual stack home. Requesting and receiving subscriber information transmission of the mobile communication terminal to a location register, and instructing a handover to the synchronous exchange to perform a handover procedure; Performing a handover procedure to a neighbor cell when the handover is a handover between neighbor cells in an asynchronous mobile communication system; Radio resource information processing method comprising a. The method of claim 1, The handover request message is an IU Reloc Required message, and includes a parameter including a message type, a handover type, a handover cause, a source ID, and a target ID. The method of claim 1, And a handover message of the synchronous mobile communication system includes parameters including a handover cause, a target cell identifier list, a classmark information type, a transcode mode, and a synchronization channel identifier. The method of claim 1, The handover procedure to the synchronous mobile communication system, Requesting handover to the base station controller / base station by the interoperation manager instructing handover to the synchronous exchange; 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 exchange, and notifying the interoperation operator that the handover is complete; And Requesting that the interoperation manager release the connection to the asynchronous exchange, disconnecting the connection between the asynchronous exchange and a Node B / wireless network controller; Radio resource information processing method comprising a.

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