KR100851593B1 - Apparatus and Method for connecting a call between heterogeneous networks - Google Patents

Abstract

The present invention relates to an apparatus and method for connecting a call between heterogeneous networks for a call call connection between different networks using a map message. The call connection method between heterogeneous networks according to an embodiment of the present invention is a synchronous mobile switch in a synchronous mobile communication network. Receiving a roaming number provision request message transmitted through the dual stack home location register from the dual stack home position register to convert the roaming number corresponding to the received roaming number provision request message into a destination address information and to transmit it to the synchronous mobile switch; Requesting a call, receiving an initial address message for a call connection transmitted from the synchronous mobile switch based on the called address information, calling an asynchronous terminal based on the received initial address message, and determining whether the incoming call is connected accordingly. Steps to determine and call direction change request message if incoming call connection fails May comprise synchronous mobile exchange sends converted to recognizable format.

MAP, MAP, Call Call Transfer, CDMA, WCDMA, REDREQ, RCH

Description

Apparatus and Method for connecting a call between heterogeneous networks

1 is a diagram illustrating a structure of a network interworking system for a call call connection between a conventional CDMA network and a WCDMA network;

2 is a diagram illustrating a structure of a network interworking system for a call call connection between a CDMA network and a WCDMA network using a MAP message according to an embodiment of the present invention;

3 is a flowchart illustrating a method of processing a MAP message according to a call connection failure when a CDMA mobile switch is a calling party and a WCDMA mobile switching party is a called party according to the first embodiment of the present invention;

4 is a flowchart illustrating a method of processing a MAP message according to a call connection failure when a WCDMA mobile switch is an originating party and a CDMA mobile exchange is a called party according to a second embodiment of the present invention.

5 is a block diagram showing an example of a detailed configuration of a WCDMA mobile switch according to an embodiment of the present invention.

The present invention relates to an apparatus and method for call connection between heterogeneous networks, and more particularly, to a heterogeneous mobile communication network interworking system and method capable of transmitting a message for requesting allocation of new routing information when a voice call connection fails between a synchronous network and an asynchronous network. will be.

Current mobile communication networks operate in North American synchronous networks and European asynchronous networks. In some countries or regions where synchronous and asynchronous networks operate independently, there is generally a way in which a synchronous and asynchronous network coexists. Therefore, in order to perform communication between a mobile communication terminal located in a synchronous network and a mobile communication terminal located in an asynchronous network, a routing service for mutual call connection is required.

In general, UMTS (Universal Mobile Telecommunication System) network transmits 'third generation', broadband packet-based text, digitized voice or video and multimedia data at high speeds of more than 2 Mbps, regardless of where mobile or computer users are in the world. Provide consistent service. UMTS networks are generally referred to as WCDMA networks because asynchronous WCDMA radio technology is applied to the radio section. This UMTS network allows computer and telephone users to continue to access the Internet while traveling and have the same performance no matter where they are traveling. Users will use this UMTS service through a combination of terrestrial radio and satellite transmission technology. However, when a wideband code division multiple access (WCDMA) and a code division multiple access (2G) network coexist, a call is connected between a mobile communication terminal located in the WCDMA network and a mobile communication terminal located in the WCDMA network. To do this, a format conversion function capable of mutual recognition of the information is required.

1 is a diagram illustrating a structure of a network interworking system for a call call connection between a conventional CDMA network and a WCDMA network.

As shown, the interworking system between the CDMA network and the WCDMA network includes a CDMA network system 10 and a WCDMA network system 50, a home location register 500 that manages service subscriber information using these networks, and between these networks. Roaming gateway 60 for interworking.

The CDMA network system 10 includes a CDMA mobile communication terminal 20, a CDMA mobile base station (BTS) 22, a CDMA base station controller (BSC) 24, and a CDMA mobile switching center (MSC) 26.

The CDMA mobile base station 22 performs a radio access termination function with the CDMA mobile communication terminal 20 according to the 3rd Generation Partnership Project 2 (3GPP2) radio access standard. In addition, the CDMA mobile base station 22 transmits and receives voice, video, and data traffic in a CDMA manner, and transmits and receives information to and from the CDMA mobile communication terminal 20 through a transmit / receive antenna.

The CDMA base station controller 24 controls the CDMA mobile base station 22 and performs a communication connection between the CDMA mobile base station 22 and the CDMA mobile switching center 26.

The CDMA mobile switch 26 routes the communication path for the CDMA mobile communication terminal 20 to communicate with the communication terminals of the external network via the CDMA mobile base station 22 and the CDMA base station controller 24.

The WCDMA network system 50 includes a WCDMA mobile communication terminal 40, a WCDMA mobile base station 42, a WCDMA base station controller 44, and a WCDMA mobile switch 46.

The WCDMA mobile base station 42 performs a radio access termination function with the WCDMA mobile communication terminal 40 conforming to the 3GPP radio access standard. In addition, the WCDMA mobile base station 42 transmits and receives voice, video, and data traffic in a WCDMA manner, and transmits and receives information to and from the WCDMA mobile communication terminal 40 through a transmit / receive antenna.

The WCDMA base station controller 44 performs wired and wireless channel management, protocol matching of the WCDMA mobile communication terminal 40, and protocol matching of the base station 42. It performs functions such as soft handover processing, core network protocol processing, GPRS (General Packet Radio Service) access, fault management, and system loading. Here, GPRS is an asynchronous communication system that supports a data transmission rate of 115 Kbps, provides a multimedia mail, and maximizes the efficiency of a transmission line by packet data transmission.

The WCDMA mobile switch 46 additionally has a soft switching structure for speeding up call processing in addition to the basic functions for voice communication in the existing Interim Standard (IS) -95B network.

On the other hand, the Home Location Register (HLR) 50 supports both CDMA and WCDMA Mobile Application Part (MAP) protocols. To this end, the home location register 50 has a dual stack structure supporting both CDMA and WCDMA networks. The home location register 50 stores and manages subscriber information for providing communication services and corresponding services between the CDMA network and the WCDMA network.

The roaming gateway 60 interfaces roaming signals between the CDMA network and the WCDMA network, and converts them into a format of a signal that the CDMA base station controller 24 and the WCDMA base station controller 44 can recognize.

As described above, an outgoing call is generated between the CDMA mobile switch 26 and the WCDMA mobile switch 46 so that a call connection failure to the incoming mobile communication terminal may be failed during the call processing to the incoming mobile communication terminal 20 or 40. When the call forwarding occurs, the Mobile Application Part (MAP) signaling between the mobile switches 26 and 46 is required. That is, when the reception of the incoming mobile communication terminal occurs, the MAP sends a MAP message requesting that a new routing number be allocated to the calling mobile switch.

Roaming GateWay (RGW) 60 is used for message conversion between the CDMA MAP message output from the CDMA mobile switch 26 and the WCDMA MAP message output from the WCDMA mobile switch 46. In this case, a redirection request message (REDREQ) is used as a CDMA MAP message, and a call setup retry request message (RCH) is used as a WCDMA MAP message. That is, the roaming gateway 60 converts the MAP message between the call direction change request message REDREQ and the call setup retry request message RCH.

As described above, when a communication connection between mobile communication terminals located in different networks is failed in a mobile communication system in which a CDMA network and a WCDMA network coexist, a call retry request is required, a network by a roaming gateway (RGW) 60. There is a problem in that call delay due to inter-MAP signaling conversion and network becomes complicated.

An object of the present invention for solving the above problems is to provide a mobile switch and a method capable of faster MAP signaling conversion for voice call interworking between each mobile communication terminal located in a CDMA network and a WCDMA network.

Another object of the present invention is to provide a CDMA network and a WCDMA network when a call transfer is required due to a failure of a call connection to a destination mobile communication terminal for a call between a mobile communication terminal located in a CDMA network and a mobile communication terminal located in a WCDMA network. The present invention provides a mobile switch and a method for providing a function of converting MAP messages between them.

Call connection method between heterogeneous networks according to an embodiment of the present invention for achieving the above object is a step of receiving a roaming number provision request message transmitted through a dual stack home location register from a synchronous mobile switch of a synchronous mobile communication network, Requesting the dual stack home location register to convert the roaming number corresponding to the received roaming number provision request message into destination address information and to transmit it to the synchronous mobile switch, and transmit from the synchronous mobile switch based on the destination address information. Receiving an initial address message for an incoming call connection, calling an asynchronous terminal based on the received initial address message, determining whether an incoming call is connected accordingly, and changing the call direction when the incoming call connection fails Request message in a format recognizable by the synchronous mobile exchange Converting and transmitting.

On the other hand, call connection method between heterogeneous networks according to another embodiment of the present invention for achieving the above object is to transmit a routing information transmission request message to the synchronous mobile switch through the dual stack home location register according to the request of the asynchronous terminal. When receiving the routing information transmitted from the synchronous mobile switch in response to the routing information transmission request message, transmitting an initial address message for call connection to the synchronous mobile switch based on the received routing information; Receiving a call direction change request message for requesting a call direction change due to a failure of a call from the synchronous mobile switch to an incoming synchronous terminal based on an initial address message, and resetting the call direction change request message Also recognized as a request message, the dual stack home location register Requesting to receive new routing information, and generating a new address message recognizable by the synchronous mobile switch for call connection based on the provided routing information and transmitting the new address message to the synchronous mobile switch.

On the other hand, the call connection device between heterogeneous networks according to another embodiment of the present invention for achieving the above object is a network for communicating with the dual stack home location register to transmit and receive information necessary for the communication connection with the synchronous mobile communication network When the relay unit receives the first initial address message for the call connection request transmitted from the synchronous mobile switch located in the synchronous mobile communication network, the synchronous mobile switch recognizes when the incoming call fails after calling the asynchronous terminal of the called subscriber. Request call connection based on the routing information provided from the synchronous mobile switch in response to the routing information requested for the call connection unit and the synchronous terminal to generate a first call direction change request message and transmit it to the synchronous mobile switch. A second initial host recognizable by the synchronous mobile switch for Receive a new routing information from the dual stack home location register by transmitting a message to the synchronous mobile switch and receiving a second call direction change request message sent from the synchronous mobile switch when a call connection with the synchronous terminal fails. And an originating processor for transmitting a third initial address message to the synchronous mobile switch.

According to an embodiment of the present invention, if a WCDMA mobile switch having a function of generating and processing a CDMA MAP message fails in call connection for a call connection between the mobile communication terminal of the CDMA network and the mobile communication terminal of the WCDMA network, the CDMA MAP By converting and recognizing a message into a WCDMA MAP message and converting and outputting a WCDMA MAP message into a CDMA MAP message, the continuity of the MAP message processing can be guaranteed and faster call processing is possible.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

According to the present invention, when a WCDMA mobile exchange accepts a conversion function for a CDMA MAP message and a call connection for a call connection between the mobile communication terminal of the CDMA network and the mobile communication terminal of the WCDMA network fails, the CDMA MAP message is converted into a WCDMA MAP message By converting the WCDMA MAP message into a CDMA MAP message and outputting the same, a WCDMA mobile switch and a method thereof are provided that enable a network having a simpler structure, ensure continuity of MAP message processing, and enable faster call processing.

2 is a diagram illustrating a network interworking system structure for a call call connection between a CDMA network and a WCDMA network using a MAP message according to an embodiment of the present invention.

As shown, the interworking system between the CDMA network and the WCDMA network includes a CDMA network system 10, a WCDMA network system 50, and a home location register 500 that manages service subscriber information using these networks.

The CDMA network system 10 includes a CDMA mobile communication terminal 20, a CDMA mobile base station (BTS) 22, a CDMA base station controller (BSC) 24, and a CDMA mobile switching center (MSC) 300.

Here, since the CDMA mobile base station 22, the CDMA base station controller 24, and the CDMA mobile switch 300 perform the same functions as before, detailed description thereof will be omitted.

The WCDMA network system 50 includes a WCDMA mobile communication terminal 40, a WCDMA mobile base station 42, a WCDMA base station controller 44, and a WCDMA mobile switch 100.

Here, since the WCDMA mobile base station 42 and the WCDMA base station controller 44 perform the same functions as before, detailed description thereof will be omitted.

In the embodiment of the present invention, the WCDMA mobile switch 100 performs the switching function of the communication path for the WCDMA mobile communication terminal 40 to communicate with the external network. In particular, the WCDMA mobile switch 100 of the present embodiment requests the calling mobile switch to be assigned a new routing number when the incoming call setup to the CDMA mobile communication terminal 20 or the WCDMA mobile communication terminal 40 fails. Performs a conversion function of the MAP message to be transmitted.

That is, while an incoming / outgoing call is generated in a situation where the CDMA mobile switch 300 and the WCDMA mobile switch 100 are directly interlocked, and the call processing is performed to the incoming mobile communication terminal 20 or 40, the incoming mobile communication terminal 20 or An unreceivable situation of 40) may occur. At this time, the WCDMA mobile switch 100 performs a function of generating and processing a call direction change request message (REDREQ) which is a CDMA MAP message.

Specifically, when the CDMA mobile switch 300 is the calling party and the WCDMA mobile switch 100 is the receiving side, the WCDMA mobile switch 100 is a CDMA mobile communication terminal 20 calls the WCDMA mobile communication terminal 40 If the connection fails, a call direction change request message (REDREQ), which is a CDMA MAP message, is generated and transmitted to the CDMA MS 300. Accordingly, the CDMA mobile switch 300 recognizes a call direction change request message (REDREQ), which is a CDMA MAP message transmitted from the WCDMA mobile switch 100, and requests another called number to the home location register 500 of the dual stack. Receives and retries the call connection to the WCDMA mobile switch.

In another example, when the WCDMA mobile switch 100 is the calling party and the CDMA mobile switch 300 is the receiving side, the CDMA mobile switch 300 calls the WCDMA mobile communication terminal 40 to the CDMA mobile communication terminal 20. If the connection fails, a call direction change request message (REDREQ), which is a CDMA MAP message, is generated and transmitted to the WCDMA mobile switch 100. Accordingly, the WCDMA mobile switch 100 interprets the call direction change request message REDREQ, which is a CDMA MAP message transmitted from the CDMA mobile switch 300, requests the dual stack home location register 500 to request new routing address information. Retries the call connection to the CDMA mobile switching center (300).

As described above, according to the present embodiment, the WCDMA mobile switch 100 is configured to perform a function of a routing gateway (RGW), which previously performed a communication link routing function between a CDMA network and a WCDMA network. Does not require a separate device for

Accordingly, a WCDMA mobile switch having a function of generating and processing a CDMA MAP message converts a CDMA MAP message into a WCDMA MAP message when a call connection for a call connection between the mobile communication terminal of the CDMA network and the mobile communication terminal of the WCDMA network fails. By recognizing and converting the WCDMA MAP message into a CDMA MAP message, the continuity of the MAP message processing is ensured and a faster call processing is possible.

The function of the WCDMA mobile switch of the present invention may consider two scenarios depending on which device is the mobile switch of the destination network in the CDMA network and the WCDMA network.

3 is a flowchart illustrating a method of processing a MAP message according to a call connection failure when a CDMA mobile switch is an originating party and a WCDMA mobile switch is a called party according to the first embodiment of the present invention.

First, the CDMA mobile switch 300 requests a call with the WCDMA mobile communication terminal 40, which is transmitted from the CDMA mobile communication terminal 20 via the mobile base station (BTS) 22 and the base station controller (BSC) 24. Receive a signal (S110). At this time, the CDMA mobile exchange 300 transmits a Location Request (LOCREQ) and a 'LOCREQ [Billing ID]' including its own address 'Billing ID' to the dual stack home location register 500 ( S120).

When the dual stack home location register 500 receives the called address request message (LOCREQ) from the CDMA mobile switch 300, the roaming number provision request message (Provide Roaming Number: PRN) is transmitted to the WCDMA mobile switch 100 ( S130). Here, the roaming number provision request message PRN includes the address information of the CDMA mobile switch 300 including 'Billing ID' which is the address information of the CDMA mobile switch 300 included in the called address request message LOCREQ. . In this case, the address information of the CDMA mobile switch 300 may be represented by the 'Gateway Mobile Services Switching Center (GMSC) _Address' parameter of the 3G MAP.

Accordingly, the WCDMA mobile switch 100 detects roaming number information for establishing a call to the WCDMA mobile communication terminal 40, and the dual stack home position as a response message (PRN_ACK) to the roaming number provision request message (PRN). Provided to the register 500 (S140). The dual stack home location register 500 detects the destination address information provided corresponding to the roaming information (PRN_ACK) provided from the WCDMA mobile switch 100, and responds to the destination address request message (LOCREQ [Billing ID)]. Provided to the CDMA mobile exchange 300 as (LOCREQ_ACK) (S150).

The CDMA mobile switch 300 receives the destination address information, which is the routing number provided from the WCDMA mobile switch 100 via the dual stack home location register 500. At this time, the CDMA mobile switch 300 to request the call setup with the WCDMA mobile communication terminal 40 based on the destination address information of the routing number, the initial address message (IAM), which is a call setup message, 'IAM [Calling Number, Called Number]' is generated and transmitted to the WCDMA mobile switch 100 (S160).

On the other hand, when the WCDMA mobile switch 100 receives an initial address message (IAM), which is a call setup message, from the CDMA mobile switch 300, the WCDMA mobile switch 100 calls for a call call connection with the WCDMA mobile communication terminal 40, which is the called subscriber terminal. It tries (S170). At this time, after the WCDMA mobile switch 100 calls the WCDMA mobile communication terminal 40, it determines whether the incoming call has failed (S180). Here, the failure of the incoming call may include, for example, a No Answer, a No Paging, a Busy, and a Call Waiting No Answer of the WCDMA mobile communication terminal 40 for a call. Can be mentioned.

If it is determined that the incoming call connection with the WCDMA mobile communication terminal 40 is successful, the WCDMA mobile switch 100 performs a call connection with the WCDMA mobile communication terminal 40 in response to a request of the CDMA mobile switch 300 (S190). ).

If it is determined that the incoming call connection with the WCDMA mobile communication terminal 40 has failed, the WCDMA mobile switch 100 is a 3G MAP indicating the address information of the CDMA mobile switch 300 included in the roaming number provision request message (PRN). From the 'GMSC_Address' parameter, 'Billing ID' which is address information of the CDMA mobile switch 300 is detected. Accordingly, the WCDMA mobile switch 100 transmits a redirection request message (REDREQ) requesting to receive a new destination address information to the detected CDMA mobile switch 300 of 'Billing ID' ( S210).

When the CDMA mobile switch 300 receives the call direction change request message REDREQ from the WCDMA mobile switch 100, the CDMA mobile switch 300 requests a change of the called number, which is a new routing number registered as the same user as the WCDMA mobile communication terminal 40. The message (Transfer To Number Request: TTNR) is transmitted to the dual stack home location register 500 (S220).

When the dual stack home location register 500 receives the incoming number change request message (TTNR) from the CDMA mobile switch 300, the dual stack home location register 500 detects the destination address information registered as the same user as the WCDMA mobile communication terminal 40, and then the CDMA mobile switch. Provided to 300 (S230).

Accordingly, the CDMA mobile switch 300 sends a change address message (IAM [Calling Number, Called Number]) to request a call connection using the change destination address information provided from the dual stack home location register 500. 100) (S240). After receiving the change address message (IAM) transmitted from the CDMA mobile switch 300, the WCDMA mobile switch 100 performs steps S170 to S210.

Therefore, when the CDMA mobile switcher 300 is the calling party and the WCDMA mobile switcher 100 is the called party, when the incoming call fails to be connected, the 3G MAP call is set so that the WCDMA mobile switcher 100 can recognize the CDMA mobile switcher 300. Interworking for call call connection through faster and easier MAP signaling conversion between CDMA network and WCDMA network by converting and sending Resume Call Handling (RCH) to 2G MAP call direction change request message (REDREQ) This is possible.

4 is a flowchart illustrating a method of processing a MAP message according to a call connection failure when a WCDMA mobile switch is a calling party and a CDMA mobile switching party is a called party according to a second embodiment of the present invention.

First, the WCDMA mobile switch 100 communicates with the CDMA mobile communication terminal 20 transmitted from the WCDMA mobile communication terminal 40 via the mobile base station (NODE-B) 42 and the base station controller (RNC) 44. Receive a call request signal (S310). At this time, the WCDMA mobile switch 100 transmits a routing information transmission request message (SRI) and 'SRI [GMSC_ADDR]' including its own address 'GMSC_Address' to the dual stack home location register 500 ( S320).

When the dual stack home location register 500 receives the routing information transmission request message (SRI) from the WCDMA mobile switch 100, the dual stack home location register 500 transmits a routing request message (ROUTEREQ) to the CDMA mobile switch 300 (S330). . At this time, the routing request message ROUTEREQ includes a 'Billing ID' parameter of 2G MAP, which is address information of the CDMA mobile switch 300, in which 'GMSC_Address' of the WCDMA mobile switch 100 is inserted. Accordingly, the routing request message ROUTEREQ may be represented as' ROUTEREQ [Billing ID].

When the routing request message ROUTEREQ is received from the dual stack home location register 500, the CDMA mobile switch 300 detects routing information for establishing a call in the CDMA mobile communication terminal 20, and then the routing request message ROUTEREQ. A dual message is provided to the dual stack home location register 500 as a response message (ROUTEREQ_ACK) (S340).

The dual stack home location register 500 provides the routing information ROUTEREQ_ACK provided from the CDMA mobile switch 300 to the WCDMA mobile switch 100 as a response message SRI_ACK for the routing information transmission request message SRI. S350).

The WCDMA mobile switch 100 receives the routing information provided from the CDMA mobile switch 300 via the dual stack home location register 500. At this time, the WCDMA mobile switch 100 is an initial address message (IAM), which is a call setup message, to request a call setup with the CDMA mobile communication terminal 20 based on the destination address information, which is routing information. 'IAM [Calling Number, Called Number]' is generated and transmitted to the CDMA mobile switch 300 (S360).

When the CDMA mobile switch 300 receives an initial address message (IAM), which is a call setup message, from the WCDMA mobile switch 100, the CDMA mobile switch 300 attempts to make a call for a call call connection with the CDMA mobile communication terminal 20, which is a called subscriber station. (S370). At this time, after the CDMA mobile switch 300 calls the CDMA mobile communication terminal 20, it determines whether the incoming call has failed (S380). Here, the failure of the incoming call is similar to that of Fig. 3 in the WCDMA mobile communication terminal 40, No Answer, No Paging, Busy, and Call Waiting No Answer. ) And the like.

If it is determined that the incoming call connection with the CDMA mobile communication terminal 20 is successful, the CDMA mobile switch 300 performs a call connection with the CDMA mobile communication terminal 20 in response to a request of the WCDMA mobile switch 100 (S390). ).

On the other hand, if it is determined that the incoming call connection with the CDMA mobile communication terminal 20 has failed, the CDMA mobile switch 300 is a 2G MAP indicating the address information of the WCDMA mobile switch 100 included in the routing request message (ROUTREQ) From the 'Billing ID' parameter, 'GMSC_ADDR' which is address information of the WCDMA mobile switch 100 is detected. Accordingly, the CDMA mobile switch 300 to the WCDMA mobile switch 100 of the 'GMSC_ADDR' detected, a redirection request message (REDREQ), 'REDREQ (Billing ID) requesting to request a new routing information ] 'Is transmitted (S410).

When the WCDMA mobile switch 100 receives the call direction change request message (REDREQ) from the CDMA mobile switch 300, in step S320 to request the transmission of new routing information registered as the same user as the CDMA mobile communication terminal 20 The SRI message is transmitted to the dual stack home location register 500 (S420).

When the dual stack home location register 500 receives a new routing information transmission request message (SRI) from the WCDMA mobile switch 100, the dual stack home location register 500 detects the routing information registered as the same user as the CDMA mobile communication terminal 20 and then WCDMA mobile switch. Provided at 100 (S430).

The WCDMA mobile switch 100 transmits a new address message (IAM [Calling Number, Called Number]) requesting a call connection to the CDMA mobile switch 300 using the new routing information provided from the dual stack home location register 500. (S440). Thereafter, the CDMA mobile switch 300 receiving the new address message IAM transmitted from the WCDMA mobile switch 100 performs steps S370 to S410.

Therefore, when the WCDMA mobile switch 100 is the calling party and the CDMA mobile switch 300 is the called party, when the incoming call fails to connect, the CDMA mobile switch 300 sends a 2G MAP call direction change request message (REDREQ) to the WCDMA mobile switch. The WCDMA mobile switch 100 converts and recognizes the 2G MAP call direction change request message (REDREQ) into 3G MAP, requests new routing information from the dual stack home location register 500, and receives and transmits the CDMA. By requesting the call connection to the exchange 300, it is possible to interwork for the call call connection through the MAP signaling conversion more quickly and easily between the CDMA network and the WCDMA network.

5 is a block diagram showing a detailed configuration example of the WCDMA mobile switch 100 according to the embodiment of the present invention.

As shown, the WCDMA mobile switch 100 largely includes an ISDN User Part (ISP) relay unit 110, an originating processor 120, and an incoming processor 140. In this case, the incoming processing unit 140 is a building block for call processing according to FIG. 3, and the outgoing processing unit 120 is a building block for call processing according to FIG. 4. In addition, the ISUP relay unit 110 controls the connection and disconnection with the external network.

The incoming call processing unit 140 includes an incoming call processing unit 141, a MAP converting unit 142, a transmitting unit 143, a successful call determining unit 144, a country discriminating unit 145, and a receiving subscriber service checking unit 146. It includes.

Here, when the incoming call processor 141 receives an IAM message requesting a call call connection through the ISUP relay unit 110, the incoming call processor 141 performs the incoming call processing on the called subscriber station.

The incoming success determination unit 144 determines whether the incoming call succeeds. If it is determined that the incoming call has failed, the called party service confirmation unit 146 determines whether or not a call transfer service such as call forwarding or voice mail (VMS) is registered. When confirmation of the service registration is made, the power determination unit 145 determines whether 2G (CDMA) / 3G (WCDMA) of the originating switching network that sent the IAM message.

If it is determined that the power station is a 2G CDMA mobile switch 300, the MAP conversion unit 142 sends a call setup retry request message (RCH) of the 3G MAP, the call direction change request message (Redirection) of the 2G MAP Request conversion to REDREQ). Accordingly, the transmitter transmits the converted call direction change request message (REDREQ) of the 2G MAP to the CDMA mobile switch 300.

On the other hand, outgoing processing unit 120 includes an outgoing call processing unit 122, a receiving unit 124, and a MAP conversion unit 142.

The outgoing call processing unit 122 performs the outgoing call processing through the ISUP relay unit 110 and receives a Redirection Request message (REDREQ) of the 2G MAP through the receiving unit 124, the MAP conversion unit 142. Request conversion to 3G MAP.

The MAP converting unit 142 transmits a call direction change request message (REDREQ) of the 2G MAP received from the CDMA mobile switch 300 and received by the receiving unit 124 (Resume Call Handling: RCH). To).

Accordingly, the outgoing call processor 122 accesses the dual stack home location register 500 through the ISUP relay unit 110 based on the converted call setup retry request message (RCH) and newly routes information of the 3G MAP. To be provided. Accordingly, the outgoing call processor 122 converts the routing information of the new 3G MAP provided from the dual stack home location register 500 into the destination address information of the 2G MAP to generate a message (IAM) for call setup, and then moves the CDMA. Call processing is performed to the exchange 300.

In the above, specific preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications and equivalents without departing from the gist of the present invention attached to the claims. Other implementations may be possible. Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

According to the present invention, a WCDMA mobile switch having a function of generating and processing a CDMA MAP message may transmit a CDMA MAP message to a WCDMA MAP when a call connection for a call connection between the mobile communication terminal of the CDMA network and the mobile communication terminal of the WCDMA network fails. By converting the message into a message and converting the WCDMA MAP message into a CDMA MAP message and outputting the message, the continuity of the MAP message processing can be ensured and a faster call processing can be performed.

In addition, when the WCDMA mobile exchange is the calling party and the CDMA mobile switching party is the called party, when the incoming call fails to connect, the CDMA mobile exchange sends a 2G MAP call direction change request message (REDREQ) to the WCDMA mobile exchange, and the WCDMA mobile exchange exchanges the 2G. MAP call direction change request message (REDREQ) is converted into 3G MAP, and new routing information is requested and provided to the dual stack home location register to request a call connection to the CDMA mobile switch, thereby making it faster and more efficient between CDMA and WCDMA networks. Interworking for call call connection through easy MAP signaling conversion is possible.

Claims (13)

Receiving a roaming number provision request message transmitted through a dual stack home location register from a synchronous mobile switch in a synchronous mobile communication network; Requesting the dual stack home location register to convert the roaming number corresponding to the received roaming number provision request message into destination address information and transmit the converted roaming number to the synchronous mobile switch; Receiving an initial address message for a call connection sent from the synchronous mobile switch based on the called address information; Calling an asynchronous terminal based on the received initial address message and determining whether an incoming call is connected accordingly; And And when the incoming call connection fails, converting a call direction change request message into a format recognizable by the synchronous mobile switch and transmitting the converted call direction request message.   The method of claim 1, And in response to the transmitted call direction change request message, receiving, by the synchronous mobile switch, a change address message for call connection transmitted based on the changed called address information obtained from the dual stack home location register. Characterized call connection method between heterogeneous. The method of claim 2, The roaming number provision request message, heterogeneous network call connection method comprising the asynchronous mobile switch address information of the 3G MAP message inserted the synchronous mobile switch address information of the 2G MAP message. The method of claim 2 or 3, The initial address message has a 2G MAP message type, Calling number information of the synchronous terminal located in the synchronous mobile communication network requesting a call, and incoming call number information of the asynchronous terminal located in the asynchronous mobile communication network to receive a call transmitted according to the call request, characterized in that it comprises a Method of call connection between heterogeneous networks. The method of claim 4, wherein Criteria for determining whether the incoming call connection is failed, Heterogeneous, characterized in that it comprises at least one of the asynchronous terminal for the call, No Answer, No Paging, Busy, and Call Waiting No Answer. How to call manganese. The method of claim 4, wherein The step of transmitting the call direction change request message, Detecting address information of the synchronous mobile switch which is inserted into the address information of the asynchronous mobile switch included in the roaming number provision request message; Converting a call setup retry request message (RCH) of the 3G MAP message for requesting a call setup retry into a call direction change request message (REDREQ) of the 2G MAP message; And And transmitting a call direction change request message (REDREQ) of the 2G MAP message based on the detected address information of the synchronous mobile switch. Transmitting a routing information transmission request message to a synchronous mobile switch through a dual stack home location register according to a request of an asynchronous terminal; When the routing information transmitted from the synchronous mobile switch is received in response to the routing information transmission request message, transmitting an initial address message for call connection to the synchronous mobile switch based on the received routing information; Receiving a call direction change request message for requesting a call direction change due to a failure of a call from the synchronous mobile switch to an incoming synchronous terminal based on the initial address message; Recognizing the call direction change request message as a call setup retry request message and requesting the dual stack home location register to receive new routing information; And And generating a new address message recognizable by the synchronous mobile switch based on the provided routing information and transmitting the recognizable new address message to the synchronous mobile switch. The method of claim 7, wherein The routing information transmission request message, the call connection method between heterogeneous networks, characterized in that the asynchronous mobile switch address information of the 3G MAP message. The method of claim 8, The initial address message has a 2G MAP message type, A heterogeneous call number information of an asynchronous terminal located in an asynchronous mobile communication network and requesting a call; and incoming call number information of the synchronous terminal receiving a call transmitted according to a call request located in a synchronous mobile communication network. How to call manganese. The method of claim 9, The call direction change request message is a call connection method between heterogeneous networks, characterized in that it has a 2G MAP message type. A network relay unit configured to communicate with a dual stack home location register to transmit and receive information necessary for a communication connection with a synchronous mobile communication network; Receiving a first initial address message for a call connection request transmitted from a synchronous mobile switch located in the synchronous mobile communication network, when the incoming call fails after calling the asynchronous terminal of the called subscriber, the first synchronous mobile switch recognizes the first call. An incoming processing unit which generates a call direction change request message and transmits it to the synchronous mobile switch; And Sending to the synchronous mobile switch a second initial address message recognizable by the synchronous mobile switch for requesting a call connection based on the routing information provided from the synchronous mobile switch in response to the routing information requested for the call connection with the synchronous terminal. And when a call connection with the synchronous terminal fails, receives a second call direction change request message sent from the synchronous mobile switch, receives new routing information from the dual stack home location register, and sends a third initial address to the synchronous mobile switch. Call connection device between heterogeneous networks comprising a transmission processor for transmitting a message. The method of claim 11, The incoming processing unit, An incoming call processor configured to perform incoming call processing to a called subscriber station of an asynchronous mobile communication network when a message requesting a call call connection is received; An incoming call discrimination unit for determining whether the incoming call is successful or not for the incoming call processing; A terminating subscriber service checking unit for determining whether or not a call transfer service is registered if it is determined that the incoming call has failed; A country discrimination unit for determining a type of an originating exchange that sent the call call connection request message when the call transfer service is registered; A MAP converting unit converting a call setup retry request message (RCH) of 3G MAP into a redirection request message (REDREQ) of 2G MAP when it is determined that the originating exchange is a synchronous mobile switch; And And a transmitter for transmitting the converted call direction change request message (REDREQ) of the 2G MAP to the synchronous mobile switch. The method of claim 11, The outgoing processing unit, A receiving unit receiving a redirection request message (REDREQ) of 2G MAP; A MAP conversion unit converting the call direction change request message (REDREQ) of the 2G MAP into a call setup retry request message (RCH) of the 3G MAP; And Based on the converted call setup retry request message (RCH), the dual stack home location register is connected to the dual stack home location register via the network relay unit to receive routing information of a new 3G MAP, and the routing information of the new 3G MAP is 2G MAP. The call connection device between heterogeneous networks, characterized in that it comprises an outgoing call processing unit for converting the destination address information of the call to generate a message (IAM) for call setup and to transmit to the synchronous mobile switch.

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