KR100579808B1 - Wireless Source Information Process Method for Hand Over from Asynchronous Mobile Communication Network to Synchronous Mobile Communication Network - Google Patents

Abstract

The present invention relates to a radio resource information processing method for handover from an asynchronous mobile communication network to a synchronous mobile communication network which can provide smooth handover by processing radio resource information of a mobile communication terminal for handover of a mobile communication terminal. When the mobile communication terminal located in the area of the asynchronous mobile communication network enters the synchronous mobile communication network, the access network of the asynchronous mobile communication network receives the information of the synchronous mobile communication network from the mobile communication terminal, and the access network of the asynchronous mobile communication network Generating a parameter for handover including information of the asynchronous mobile communication network and the information of the received synchronous mobile communication network, and transmitting a redirection request message including the generated parameter for handover to the switch of the asynchronous mobile communication network. To provide radio resource information of accurate synchronization network. In this way, the handover can be performed smoothly without call disconnection.

Description

Wireless resource information processing method for handover from asynchronous mobile communication network to synchronous mobile communication network {Wireless Source Information Process Method for Hand Over from Asynchronous Mobile Communication Network to Synchronous Mobile Communication Network}

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

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

3 is a block diagram illustrating a common module configuration of a mobile communication terminal according to the present invention shown in FIG. 2;

4 is an explanatory diagram for explaining radio resource information processing for handover according to the present invention;

5A and 5B are explanatory diagrams for explaining parameters for radio resource information processing according to the present invention;

6 is a flowchart illustrating a handover process according to an embodiment of the present invention.

<Brief description of the main parts of the drawings>

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

400: mobile communication terminal 410: antenna

420: asynchronous radio 430: synchronous radio

440: common module 443: main processor

The present invention relates to a radio resource information processing method for handover from an asynchronous mobile communication network to a synchronous mobile communication network which can provide smooth handover by processing radio resource information of a mobile communication network for handover of a mobile communication terminal.

Currently, mobile communication service technology can be broadly classified into an asynchronous service environment centered on Europe and a synchronous service environment centered on North America. In addition, the IMT-2000 service is evolving around North America and Europe as a new mobile communication technology standard for delivering packets at high speed.

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

The asynchronous mobile communication network is being constructed around an area with a high demand for services. Accordingly, the synchronous mobile communication network evolves into a form in which the service area includes a service area of an asynchronous system. When intercommunicating between a communication system and a synchronous mobile communication system, handover between systems is required for continuous service provision.

Accordingly, there is a demand for a method capable of processing radio resource information for handover from an asynchronous mobile communication network to a synchronous mobile communication network.

Accordingly, in order to solve the above problems, the present invention provides a handover from an asynchronous mobile communication network to a synchronous mobile communication network for processing radio resource information of a mobile communication network for handover of a mobile communication terminal supporting dual band dual mode. The purpose is to provide a radio resource information processing method for over.

In accordance with an aspect of the present invention, a method for processing radio resource information for handover from an asynchronous mobile communication network to a synchronous mobile communication network includes an asynchronous wireless device for performing asynchronous communication with an asynchronous mobile communication network, and a synchronous mobile communication network. A dual band dual mode mobile communication terminal having a synchronous radio for performing synchronous communication and a common module for performing control during radio communication with the synchronous mobile network and the asynchronous mobile communication network through the asynchronous radio and the synchronous radio. A radio resource information processing method for handover from the asynchronous mobile communication network to the synchronous mobile communication network, wherein the asynchronous mobile communication terminal located in an area of the asynchronous mobile communication network enters the synchronous mobile communication network. The mobile communication terminal is the access network of the communication network From a first step of receiving information of the synchronous mobile communication network; A second step of generating, by an access network of the asynchronous mobile communication network, a parameter for handover including information of the asynchronous mobile communication network and information of the synchronous mobile communication network received in the first step; A third step of transmitting a re-routing request message including a parameter for handover generated in the second step to an exchange of the asynchronous mobile communication network; And a fourth step of performing a handover by the exchange of the asynchronous mobile communication network requesting a handover to the synchronous mobile communication network according to the information included in the redirection request message received in the third step. It is done.

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

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

Referring to FIG. 1, an asynchronous mobile communication network (WCDMA network) 100 includes a wireless station 101 that performs wireless communication with a mobile communication terminal 400 and a wireless station controller (hereinafter, referred to as' RNC ( Radio network controller) and a serving GPRS support node (hereinafter referred to as 'SGSN') that is connected to the RNC 102 to manage mobility of the mobile communication terminal 400. (103) and the asynchronous communication network data service gateway node (hereinafter referred to as 'GGSN'), which is a relay device for performing the packet service control and packet data transmission through the general packet radio service (GPRS) network 105. 106).

In addition, the RNC 102 is connected to a switch (hereinafter referred to as "MSC (Mobile Switching Center)") 104 to perform a call exchange, the MSC 104 is a number seven signal network (No. .7 signal network). The number seven signal network 107 includes a short message service center (hereinafter, referred to as a short message service center (SMSC)) 108 that services a short message, and a dual stack home location register for managing location information of a subscriber. (Hereinafter referred to as 'dual stack HLR (Home Location Register)') 300 is connected. At this time, the dual stack HLR 300 is shared with the synchronous mobile communication network 200 to be described later.

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

The MSC 203 is connected with a number seven signal network (No. 7 signal network) 205 for signal exchange. The number seven signal network 205 is connected to a short message service center (hereinafter referred to as SMSC) 206 that serves a short message, and the dual stack HLR 300 for managing location information of a subscriber.

The MSCs 104 and 203 of the asynchronous mobile communication network 100 and the synchronous mobile communication network 20 are interconnected, and the number seven signal networks 107 and 205 are also interconnected to handover the mobile communication terminal 400. Information necessary for transmitting and receiving is transmitted.

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

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

Referring to FIG. 2, the dual band mobile communication terminal 400 according to the present invention supports both synchronous mobile communication and asynchronous mobile communication and has a stack of respective protocols.

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

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

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

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

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

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

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

4 is an explanatory diagram for explaining radio resource information processing for handover according to the present invention.

Referring to FIG. 4, when the mobile communication terminal 400 is located in the area A of the asynchronous mobile communication network 100 and then in the boundary area C of the area B of the synchronous mobile communication network 200, Handover is made.

To this end, the mobile communication terminal 400 obtains information of the synchronous mobile communication network from the access network (BTS / BSC) of the synchronous mobile communication network 200. The mobile communication terminal 400 transmits the acquired information (information of a synchronous mobile communication network including neighboring BTS information) to an access network (radio station / RNC) of the asynchronous mobile communication network 100 and requests a handover.

Accordingly, the access network (radio station / RNC) of the asynchronous mobile communication network transmits a handover request message including information necessary for handover while performing a relocation request for handover to the MSC, which is the core network. In this case, the handover request message includes not only parameters commonly used in the asynchronous mobile communication network shown in FIG. 5A, but also parameters indicating information of a synchronous mobile communication network to perform handover shown in FIG. 5B, as shown in FIG. 5B. In the same manner, cell information including cell base station information of the synchronous mobile communication network located in the boundary area C, channel information of the synchronous mobile communication network, and the like are included.

Accordingly, the MSC 103 of the asynchronous mobile communication network receives each parameter shown in FIGS. 5A and 5B transmitted from the access network, determines handover, and acquires subscriber information from the dual stack home location register 300. The MSC 104 of the asynchronous mobile communication network requests a handover to the MSC 203 of the synchronous mobile communication network 200 based on the information obtained from the dual stack home location register 300 and the information received from the access network. .

Hereinafter, the entire process of performing handover according to the radio resource information acquired through the above process according to the present invention will be described.

6 is a flowchart illustrating a handover process according to an embodiment of the present invention.

Referring to FIG. 6, during a call from the asynchronous mobile communication network to the asynchronous wireless device 420 of the mobile communication terminal 400 (S10), the access network (radio station and RNC) of the asynchronous mobile communication network is handed over by the mobile communication terminal. Determine (S21). If it is determined in step S21 that the handover is performed according to a preset handover condition, the access network transmits an IU Reloc Required message for handover to the core network (S22). In this case, as shown in FIGS. 5A and 5B, the rerouting request message includes information of a synchronous mobile communication network (for example, cell information (Cell Identifier List), etc.) to perform handover.

Accordingly, the MSC of the asynchronous mobile network core network uses a MAP (Mobile Application Part) message to send a dual stack HLR message (MAP SEND IMSI Req) requesting information from the synchronous mobile communication network of the mobile terminal to perform handover. It transmits (S31). The dual stack HLR transmits a response message including the ESN and MIN information to the MSC of the asynchronous mobile communication network (S32).

The MSC of the asynchronous mobile communication network transmits a handover request message (FacilitiesDirective2) of the mobile communication terminal corresponding to the MIN information included in the response message to the MSC, which is the core network of the synchronous mobile communication network (S41). In this case, the handover request message includes cell information, a billing ID, and the like, which are base station information of the aforementioned synchronous mobile communication network to perform the handover.

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

The access network of the synchronous mobile communication network transmits a null traffic channel frame to a synchronous radio of a mobile communication terminal corresponding to the MIN through a forward fundamental channel (F-FCH) for forward traffic transmission (F-FCH). S50). The access network transmits a handover request response message to the MSC of the synchronous mobile communication network (S61). Accordingly, the omni-directional channel is allocated to the synchronous radio 430 of the mobile communication terminal 400.

As such, when the handover preparation is completed in the synchronous mobile communication network 200, the MSC 203 of the synchronous mobile communication network 200 transmits a response signal to the asynchronous mobile communication network 100, that is, a handover request message response ( FacilitiesDirective2 Ack) is transmitted (S62). Thereafter, the MSC of the asynchronous mobile communication network 100 transmits an IU Relocation Command to the access network (radio station / RNC) (S71).

According to the rerouting command in step S71, the access network (radio station / RNC) transmits a handover request message to the asynchronous radio device 420 of the mobile communication terminal 400 (S72). In this case, the handover message includes a message related to a synchronous mobile communication network, in particular, information for channel allocation.

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

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

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

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

Thereafter, the access network (BTS / BSC) of the synchronous mobile communication network 200 notifies the MSC 203 of the handover completion (Handoff Complete) (S94), and the MSC 203 of the synchronous mobile communication network 200 moves asynchronously. The handover completion is notified to the core network of the communication network 100 (S95). The asynchronous mobile communication network 100 changes the radio station bearer termination and the synchronous mobile communication network bearer termination in one way according to the handover completion notification.

The MSC 104 of the asynchronous mobile communication network 100 requests the radio station / RNC to release the call with the asynchronous radio 420 of the mobile communication terminal 400 (Iu Release Command, S101). Accordingly, the asynchronous mobile communication network 100 releases the call with the asynchronous radio device 420, and reports to the core network that the call release is completed (IU Release Complete) (S102). The asynchronous mobile communication network 100 removes the radio station bearer termination of the access network (S103).

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

The present invention described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the embodiments described above are to be understood in all respects as illustrative and not 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 in detail above, according to the radio resource information processing method for handover from an asynchronous mobile communication network to a synchronous mobile communication network according to the present invention, a dual band dual mode mobile communication terminal is an area of a synchronous mobile communication network in an area of an asynchronous mobile communication network. In case of moving to, the call connection rate can be improved by smoothly performing handover without disconnection by providing accurate radio network information.

Claims (7)

An asynchronous wireless device for performing asynchronous communication with an asynchronous mobile communication network, a synchronous wireless device for performing synchronous communication with a synchronous mobile communication network, and with the synchronous mobile communication network and an asynchronous mobile communication network through the asynchronous wireless device and the synchronous wireless device. A radio resource information processing method for handover from an asynchronous mobile communication network to a synchronous mobile communication network for a dual band dual mode mobile communication terminal having a common module for performing control during wireless communication, A first step in which an access network of the asynchronous mobile communication network receives information of the synchronous mobile communication network from the mobile communication terminal when the mobile communication terminal located in the area of the asynchronous mobile communication network enters the synchronous mobile communication network; A second step of generating, by an access network of the asynchronous mobile communication network, a parameter for handover including information of the asynchronous mobile communication network and information of the synchronous mobile communication network received in the first step; A third step of transmitting a re-routing request message including a parameter for handover generated in the second step to an exchange of the asynchronous mobile communication network; And And a fourth step of performing a handover by the exchange of the asynchronous mobile communication network requesting a handover to the synchronous mobile communication network according to the information included in the redirection request message received in the third step. A radio resource information processing method for handover from an asynchronous mobile communication network to a synchronous mobile communication network. The method of claim 1, The asynchronous mobile communication network and the synchronous mobile communication network includes a dual stack home location register for managing subscriber information of the asynchronous mobile communication network and the synchronous mobile communication network, The fourth step, Requesting subscriber information of the synchronous mobile communication network with respect to the mobile communication terminal to the dual stack home location register; Transmitting a handover request message including subscriber information of the mobile communication terminal received from the dual stack home location register to the synchronous mobile communication network; A fourth step of the synchronous mobile communication network allocating an omnidirectional channel to the synchronous wireless device of the mobile communication terminal according to the subscriber information of the mobile communication terminal; Step 4-4, when the synchronous mobile communication network transmits a response message to the exchange of the asynchronous mobile communication network after allocating the omni-directional channel, the asynchronous mobile communication network transmits a handover request message to the asynchronous wireless device of the mobile communication terminal. ; A step 4-5 in which the mobile communication terminal performs setup of a synchronous radio according to the handover request message, and performs connection by synchronizing a reverse channel assignment and synchronization with the synchronous mobile communication network; And And a step 4-6 of releasing a path between the asynchronous mobile communication network and the asynchronous wireless device of the mobile communication terminal according to the handover completion message from the synchronous mobile communication network after the connection. Radio resource information processing method for handover to a synchronous mobile communication network. The method of claim 1, The information on the synchronous mobile communication network included in the redirection request message in the third step, A cell information including base station information of the synchronous mobile communication network located at a boundary between the asynchronous mobile communication network and the synchronous mobile communication network, and channel information and protocol information of the synchronous mobile communication network. Radio resource information processing method for handover to a synchronous mobile communication network. The method of claim 3, The asynchronous mobile communication network and the synchronous mobile communication network includes a dual stack home location register for managing subscriber information of the asynchronous mobile communication network and the synchronous mobile communication network, The dual stack home location register may request a message for the information on the synchronous mobile communication network for the mobile communication terminal to perform a handover using a MAP message according to the redirection request message. Radio resource information processing method for handover from an asynchronous mobile communication network to a synchronous mobile communication network. The method of claim 4, wherein The synchronous mobile communication network performs omni-directional channel allocation by transmitting a null traffic channel frame to the synchronous radio of the mobile communication terminal through the base station according to the information included in the handover request message transmitted from the switch of the asynchronous mobile communication network. A radio resource information processing method for handover from an asynchronous mobile communication network to a synchronous mobile communication network, characterized in that the. The method of claim 2, The setup is Transmitting, by the asynchronous mobile communication network, a handover request message including channel allocation information to an asynchronous wireless device of the mobile communication terminal according to the handover request message; Transmitting, by the asynchronous wireless device of the mobile communication terminal, the channel assignment information to the synchronous wireless device of the mobile communication terminal; And And performing a mode switch between the asynchronous wireless device and the synchronous wireless device, wherein the radio resource information processing method for handover from the asynchronous mobile communication network to the synchronous mobile communication network. delete

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