KR100940874B1 - Method for processing mobile number portability for originating call of IP network and system thereof, and mobile communication system for the same - Google Patents

Abstract

The present invention relates to a number transfer processing method and system for an outgoing call of an IP network, and a mobile communication system for the same. When the called terminal receiving the call originated from the SIP terminal of the IP network is a terminal that has moved number from the first mobile communication network to the second mobile communication network, the first mobile communication network obtains the number shifted routing information for the called terminal. 2 Connect the call between the called terminal and the SIP terminal of the mobile communication network. To this end, the home location register of the first mobile communication network should provide whether or not the number is moved to the called terminal, and the number mobile server should provide routing information of the mobile communication network to which the called terminal has been numbered. The exchange of the first mobile communication network obtains routing information through the number mobile server when the destination terminal is a number-transported terminal, and connects a call with the destination terminal through the exchange of the second mobile communication network using the obtained routing information. . According to the present invention, the cost is reduced in the number porting process for the outgoing call in the IP network. In addition, the number transfer process can be simplified by processing in the destination mobile communication network without passing through the IP network during the number transfer process for the outgoing call in the IP network.

Number Transfer, MNP, SIP, IP Network

Description

Method and system for processing number port for outgoing call of IP network, and mobile communication system for the same {Method for processing mobile number portability for originating call of IP network and system approximately, and mobile communication system for the same}

The present invention relates to a number transfer processing method in a mobile communication network. More specifically, the present invention relates to a method and system for providing a number porting service in a mobile communication network that receives a call originated from an IP-based wired communication network (hereinafter referred to as an "IP network") network, and a mobile communication system for the same.

Currently, a mobile communication network, WCDMA (Wideband Code Division Multiple Access, WCDMA), provides a circuit-based video call service, and also enables a video call service with a heterogeneous IP network.

In addition, the subscriber maintains the unique identification number of the mobile carrier previously used by the subscriber in the recent mobile communication service and moved only from the mobile communication service provider to maintain similar identification numbers from other mobile communication service providers while maintaining the unique identification number of the previously used mobile carrier. With the introduction of the Mobile Number Portability (MNP) service for receiving a mobile communication service, the use of identification numbers 011, 016, and 019, which are uniquely used by mobile communication service providers, has become meaningless. Representative implementation methods of the number porting service in the mobile communication network include a Query on HLR Release (QoRH), Terminating Call Query on Digit analysis (TQoD), and Original Call Query on Digit analysis (OQoD).

Hereinafter, a description will be given of a number porting process in a mobile communication network for an outgoing call in a conventional IP network with reference to FIGS. 1 and 2.

FIG. 1 is a diagram schematically illustrating a system for providing number porting processing in a mobile communication network for an outgoing call in a conventional IP network, and includes a signal conversion gateway (G / W) 20 and 30 and an originating exchange. (22), a Home Location Register (HLR) 24, a called party exchange 32, and a number transfer server 12. Here, the number transfer server 12 belongs to the originating IP network 1 together with the Session Initial Protocol (SIP) terminal 10, which is the originating terminal, and includes a signal conversion gateway 20, an originating exchange 22, and an HLR ( 24 belongs to a mobile communication network (hereinafter referred to as "pre-mobile mobile communication network" 2) to which the destination terminal 34 is subscribed before the number transfer, and the signal conversion gateway 30 and the destination side exchange 32 correspond to the destination terminal ( Along with 34, the called terminal 34 belongs to a mobile communication network (hereinafter, referred to as "mobile mobile network", 3) to which a subscriber terminal 34 is subscribed.

Referring to FIG. 2, first, the SIP terminal 10 of the IP network 1 performs a signal conversion gateway 20 of the mobile communication network 2 before moving in order to make a video call to the calling terminal 34, which is a mobile communication terminal. When the INVITE message, which is the call connection request message, is transmitted (S10), the signal conversion gateway 20 converts the initial address message (IAM), which is the initial address message of the ISDN (ISDN User Part) corresponding thereto, to the originating exchange ( 22) (S11).

Next, the source exchange 22 transmits a location request message (LOR) message to the HLR 24 to inquire the location of the called terminal 34 (S12), and a response message (LOR ACK) thereto. Receive (S13). At this time, since the terminating terminal 34 is a number-transferred terminal, the HLR 24 includes information Ported that the terminating terminal 34 has been ported in the location inquiry response message (LOR ACK), thereby making the call-side exchange 22 To pass.

Subsequently, the source exchange 22 notifies the signal conversion gateway 20 of the number transfer of the called terminal 34 through a call progress (CPG) message (S14), and the signal conversion gateway 20 notifies the contents of the message 183. The SESSION PROGRESS message is converted and transmitted to the SIP terminal 10 (S15).

In this process, the SIP terminal 10 that the called terminal 34 has found that the number has moved has moved to the IP network 1 in order to find out which mobile communication number the called terminal 34 has moved to. The routing information (routing number, hereinafter " RN ") of the network to which the called terminal 34 is subscribed to the number porting server 12 having the information is received and received (S16, S17). To this end, the IP network 1 must have its own number porting server 12.

Thereafter, the SIP terminal 10 transmits the INVITE message to the signal conversion gateway 30 of the mobile communication network 3 having the destination terminal 34 through the RN (S18), and the signal conversion gateway 30 This is converted into IAM and transmitted to the destination exchange 32 (S19).

Subsequently, the destination side exchange 32 requests paging (PAGING) from the destination terminal 34 (S20) and transmits an address complete message (ACM), which is an address completion message, to the signal conversion gateway 30 (S21). Next, the signal conversion gateway 30 converts it to 180 RINGING and transmits it to the SIP terminal 10 (S22).

Next, when the destination exchange 32 receives a response to paging from the destination terminal 34 (S23), it transmits an ANM (Answer Message), which is a response message, to the signal conversion gateway 30 (S24), and converts the signal conversion gateway ( 30 converts it to 200 OK and transmits it to the SIP terminal 10 (S25), the call connection request for the video call is completed between the SIP terminal 10 and the called terminal 34.

Thereafter, the signal conversion gateway 30 starts the H.245 negotiation with the destination terminal 34 for the video call (S26), and when the negotiation ends (S27), the signal conversion gateway 30 and the signal conversion gateway (for the video call) The channel for the video call is opened between 30 and the video call is started between the SIP terminal 10 and the called terminal 34 (S28).

As described above, in the related art, in order to perform the number transfer process for the outgoing call in the IP network 1, the number transfer process was possible only by having a separate number transfer server 12 in the outgoing IP network 1. However, mobile communication networks 2 and 3, which are generally called networks, are equipped with a number transfer server for number transfer processing. Therefore, if the destination side 2 or 3 performs number transfer processing, the number in the originating IP network 1 is used. There is no need for a mobile server. Therefore, in consideration of the cost, it is preferable that the number porting process should be performed in the called party's mobile communication network for the outgoing call in the IP network.

Accordingly, an object of the present invention is to provide a number porting process in a destination mobile communication network for an outgoing call from an IP network, and to reduce the cost for the number porting process between heterogeneous networks. It is to provide a communication system.

In order to achieve the above object, the number transfer processing method according to one aspect of the present invention,

A method of performing a number transfer process for an outgoing call from a Session Initial Protocol (SIP) terminal of an IP network to a called terminal of a subscriber whose number has moved from a first mobile communication network to a second mobile communication network, the method comprising: a) The exchange according to the incoming request to the called terminal from the SIP terminal, where the home location register stores information on the subscriber and also stores information on whether the number has been moved to the terminal. Performing a location query; b) when the location inquiry result through the home location register confirms that the called terminal has been moved, the number mobile server provided in the first mobile communication network by the exchange of the first mobile communication network, wherein the number mobile server is Storing routing information of the called terminal in the second mobile communication network; And c) the switch of the first mobile communication network connecting the call with the called terminal through the switch of the second mobile communication network using the routing information so that the call is connected between the SIP terminal and the called terminal. .

Mobile communication system according to another aspect of the present invention,

A mobile communication system of a first mobile communication network which provides number porting processing for an outgoing call from a SIP terminal of an IP network to a called terminal of a subscriber whose number has moved from a first mobile communication network to a second mobile communication network, wherein the heterogeneous network is A signal conversion gateway performing call processing between an IP network and the first mobile communication network; An originating exchange that provides a mobile communication service for a terminal belonging to the first mobile communication network, and performs an interworking function between the IP network and the second mobile communication network connected through the signal conversion gateway; A home location register which stores information on subscribers subscribed to the first mobile communication network and also stores information on whether a number has been moved for the terminal; And a number transfer server that stores routing information about the number-shifted terminal, wherein the calling exchange is determined that the called terminal is a number-transported terminal through a position inquiry to the home location register. Obtaining routing information from the mobile server, and using the obtained routing information to connect a call with the destination terminal belonging to the second mobile communication network through the switch of the second mobile communication network.

Number transfer processing system according to another aspect of the present invention,

An IP network for calling through a SIP terminal; The receiving terminal receiving the outgoing call of the SIP terminal of the IP network is a mobile communication network subscribed before the number transfer, and the home location register, where the home location register stores information on the subscriber, and information on whether the number is moved to the terminal. Routing information of the mobile number network which has been ported through the number porting server, where the number porting server stores the routing information for the number ported terminal when it is confirmed that the called terminal has been number-shifted through the position inquiry to A pre-movement mobile communication network for acquiring and transmitting the outgoing call to the mobile communication network to which the called terminal has moved a number; And a mobile communication network in which the called terminal is number-transported, and after the mobile communication network transmitting the outgoing call transmitted from the mobile communication network to the called terminal to connect the call between the SIP terminal and the called terminal.

According to the present invention, the cost is reduced in the number porting process for the outgoing call in the IP network.

In addition, the number transfer process can be simplified by processing in the destination mobile communication network without passing through the IP network during the number transfer process for the outgoing call in the IP network.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

In addition, when a part is said to "include" a certain component, this means that it may further include other components, except to exclude other components unless otherwise stated.

In the present specification, a called terminal may include a called terminal (Mobile Station, MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user device ( It may refer to a user equipment (UE), an access terminal (AT), or the like, and may include all or some functions of a mobile terminal, a subscriber station, a portable subscriber station, a user device, and the like.

3 is a diagram schematically illustrating a system for providing number porting processing in a mobile communication network for an outgoing call in an IP network according to an embodiment of the present invention.

As shown in Fig. 3, in the number transfer process according to the embodiment of the present invention, for outgoing calls from the SIP terminal 110 subscribed to the IP network 100, the destination terminal 320 subscribes before the number transfer. The mobile communication network (hereinafter referred to as "pre-mobile mobile communication network", 200) and the called terminal 320 are made through a mobile communication network (hereinafter referred to as "mobile mobile communication network", 300) subscribed after the number movement.

If the mobile communication network 200 before the movement is determined that the destination terminal 320 that receives the call originating from the SIP terminal 110 of the IP network 100 is the number-shifted terminal, the information indicating that the number has been shifted as in the prior art is SIP. Instead of transmitting to the terminal 110, the terminal acquires routing information of the called terminal 320 which is internally numbered and transfers the incoming call to the mobile communication network 300 after the movement.

After the movement, the mobile communication network 300 transfers the incoming call transmitted from the mobile communication network 200 to the destination terminal 320 which has been moved to the number so that the call channel is established between the mobile communication network 200 and the SIP terminal 110. 320 and the SIP terminal 110 may perform a video call.

The mobile communication network 200 before the movement includes a signal conversion gateway 210, an originating exchange 220, an HLR 230, and a number mobile server 240 for the number porting process.

The signal conversion gateway 210 performs call processing between the mobile communication network 200 and the IP network 100 that are heterogeneous networks. In particular, the signal conversion gateway 210 converts the ISUP format message of the mobile communication network 200 to the SIP format message of the IP network 100 before the movement, or converts the SIP format message of the IP network 100 before the movement. Call processing between heterogeneous networks, such as a message of the ISUP format of the mobile communication network 200, is performed.

The source exchanger 220 provides a mobile communication service for terminals belonging to the mobile communication network 200 before moving through a wireless base station (not shown), and is connected to an IP network (connected through the signal conversion gateway 210). 100) and the mobile communication network 300 after the movement.

The HLR 230 stores a service profile related to subscriber information for a user of a terminal subscribed to the mobile communication network 200 before moving. In the embodiment of the present invention, the HLR 230 also stores information on whether the terminal moves.

The number transfer server 240 stores the routing information (RN) for the terminals that have performed the number transfer. In particular, in the embodiment of the present invention, the number transfer server 240 performs routing after the number transfer for the terminal subscribed to the mobile communication network 200. Save the information.

In addition, the mobile communication network 300 after the movement includes the destination side exchange 310.

The destination side exchange 310 provides a mobile communication service for a terminal belonging to the mobile communication network 300, for example, the destination terminal 320, after moving through a wireless base station (not shown), and according to an embodiment of the present invention. In particular, performs the interworking function with the mobile communication network 300 before moving.

Hereinafter, referring to FIG. 4, a method for providing number porting processing in a mobile communication network for an outgoing call in an IP network will be described.

Prior to the description, the SIP terminal 110 of the IP network 100 is a calling terminal requesting a video call call, and the called terminal 320 is a number from the mobile communication network 200 to the mobile communication network 300 after the movement. Assume that it is a mobile terminal.

First, the SIP terminal 110 of the IP network 100 transmits an INVITE message to the signal conversion gateway 210 to request a call to the terminating terminal 320 (S100).

The signal conversion gateway 210 converts the SIP protocol into an ISUP protocol and transmits an IAM, which is an initial address message corresponding to the INVITE message, to the originating exchange 220 (S110).

The originating exchange 220 transmits a LOR message, which is a location inquiry message, to the HLR 230 in order to inquire the location of the called terminal 320 that is requested to be received from the SIP terminal 110 (S120). At this time, the HLR 230 confirms whether or not the number of the destination terminal 320 is moved through the subscriber information of the destination terminal 320 that is requested to look up the location, where the destination terminal 320 is a number-shifted terminal, HLR 230 includes the information (Ported) indicating that the destination terminal 320 has moved the number in the LOR ACK message, which is a response message for the location inquiry, and transmits it to the calling exchange 220 (S130).

Therefore, since the calling side exchange 220 knows whether or not the number of the called terminal 320 has moved through the step (S130), the called terminal 320 of the mobile communication network, that is, the number of the mobile communication network 300 after the movement In order to inquire the information, the number transfer inquiry message for requesting the inquiry of the routing information of the mobile communication network numbered by the destination terminal 320 is transmitted to the number transfer server 240 held in the mobile communication network 200 before the movement (S140). ).

Since the number mobile server 240 has already stored the routing information to the mobile communication network 300 after the destination terminal 320 subscribed to the mobile communication network 200 before moving the number, in step S140 In the response message to the number transfer inquiry message of the destination terminal 320, the number is moved to include the routing information (RN) to the mobile communication network 300 after the movement is subscribed to and transmits to the source exchange 220 (S150). ).

In this way, since the originating exchange 220 has obtained routing information to the mobile communication network 300 to which the terminating terminal 320 has moved the number, the originating exchange 220 is moved to which the terminating terminal 320 is subscribed. The IAM corresponding to the call connection request message is transmitted to the called side exchange 310 in the mobile communication network 300 (S160).

Next, the called side exchange 310 requests paging (PAGING) to the called terminal 320 (S170) and transmits an ACM, which is an address completion message, to the calling side exchange 220 (S180). Subsequently, the source exchange switch 220 transmits the ACM to the signal conversion gateway 210 (S190), and the signal conversion gateway 210 converts the ACM to 180 RINGING and transmits it to the SIP terminal 110 (S200). .

Thereafter, the source exchange 310 displays the information ported in the CPG message to inform the signal conversion gateway 210 that the call connected in step S200 indicates that the call is a number transfer process. In operation S210, the signal conversion gateway 210 converts the signal into a 183 SESSION PROGRESS message and transmits the converted message to the SIP terminal 110 in operation S220.

On the other hand, if the SIP terminal 110 does not support the call connection with the numbered destination terminal 320, the call is forced to terminate after receiving the 183 SESSION PROGRESS message in step (S220).

Next, when the called side exchange 310 receives a response to paging from the called terminal 320 (S230), it transmits ANM, which is a response message, to the calling side exchange 220 (S240), and the calling side exchange 220 does this. The signal is transmitted to the signal conversion gateway 210 again (S250). When the signal conversion gateway 210 converts the message 200 into a 200 OK message and transmits it to the SIP terminal 110 (S260), the call connection for the video call between the SIP terminal 110 and the called terminal 320 is moved. The request is complete.

Thereafter, the signal conversion gateway 210 starts the H.245 negotiation with the destination terminal 320 for the video call (S270), and when the negotiation ends, between the destination terminal 320 and the signal conversion gateway 210 for the video call. Since the channel for the video call is opened in the video call between the SIP terminal 110 and the called terminal 320 is started (S280).

In the above description, only the SIP terminal 110 of the IP network 100 requests a video call to the called terminal 320 which has been ported number. However, referring to the above description, the SIP terminal 110 of the IP network 100 may be applied to a voice call. Those skilled in the art will readily understand.

In addition, the above description is limited to only sending a call in the IP network 100 and performing a number porting process in the mobile communication network. However, the technical scope of the present invention is not limited thereto. In the case where the destination terminal is a number ported terminal, it is easily understood that the numbering process may be included in the scope of the present invention when referring to the above description.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a diagram schematically illustrating a system for performing number transfer processing in a mobile communication network for an outgoing call in a conventional IP network.

2 is a flowchart illustrating a number transfer processing method in a mobile communication network for an outgoing call in a conventional IP network.

3 is a diagram schematically illustrating a system for providing number porting processing in a mobile communication network for an outgoing call in an IP network according to an embodiment of the present invention.

4 is a flowchart of a method for providing number porting processing in a mobile communication network for an outgoing call in an IP network according to an embodiment of the present invention.

Claims (14)

Claims [1] A method of performing a number transfer process for an outgoing call from a SIP (Session Initial Protocol) terminal of an IP network to a called terminal of a subscriber whose number has moved from a first mobile communication network to a second mobile communication network. a) a home location register in the first mobile communication network in which the exchange of the first mobile communication network is in response to a call request from the SIP terminal to the called terminal, wherein the home location register stores information about the subscriber; Storing location information whether the number has been moved; b) when the location inquiry result through the home location register confirms that the called terminal has been moved, the number mobile server provided in the first mobile communication network by the exchange of the first mobile communication network, wherein the number mobile server is Storing routing information of the called terminal in the second mobile communication network; And c) allowing the exchange of the first mobile communication network to connect a call with the destination terminal through the exchange of the second mobile communication network using the routing information so that a call is connected between the SIP terminal and the destination terminal. Number movement processing method comprising a. The method of claim 1, In step c), the first mobile communication network informs the SIP terminal that the called terminal has moved the number. The method of claim 2, Step a) is Receiving, by the signal conversion gateway of the first mobile communication network, a call connection request message of a SIP protocol from the SIP terminal; Transmitting, by the signal conversion gateway, a call connection request message of an ISUP protocol corresponding to a call connection request message of the SIP protocol to an exchange of the first mobile communication network; And Inquiring, by the exchange of the first mobile communication network, the location of the called terminal from the home location register of the first mobile communication network; Number movement processing method comprising a. The method of claim 3, B), As a result of the position inquiry for the called terminal, by the exchange of the first mobile communication network, receiving information indicating that the called terminal has been moved from the home location register; Requesting, by the exchange of the first mobile communication network, routing information for the called terminal to the number mobile server; And Receiving routing information from the number mobile server to the second mobile communication network to which the called terminal is number-transferred; Number movement processing method comprising a. The method of claim 4, wherein C), i) sending, by the exchange of the first mobile communication network, a call connection request message to the exchange of the second mobile communication network using the routing information; ii) receiving an address completion message from an exchange of the second mobile communication network and delivering the address completion message to the SIP terminal; iii) informing the SIP terminal that the call of the first mobile communication network to which the call is connected to the called terminal is a number porting process; iv) receiving a response message from the exchange of the second mobile communication network and delivering the response message to the SIP terminal; And v) connecting a call between the SIP terminal and the called terminal; Number movement processing method comprising a. The method of claim 5, Step iii), Transmitting, by the exchange of the first mobile communication network, information to the signal conversion gateway that the called terminal has been numbered; And Converting, by the signal conversion gateway, into a message of a SIP port corresponding to the information that the called terminal has been numbered, and transmitting the message to the SIP terminal; Number movement processing method comprising a. In the mobile communication system of the first mobile communication network which provides number porting processing for an outgoing call from a SIP terminal of an IP network to a called terminal of a subscriber whose number has moved from a first mobile communication network to a second mobile communication network, A signal conversion gateway for performing call processing between the IP network and the first mobile communication network that are heterogeneous; An originating exchange that provides a mobile communication service for a terminal belonging to the first mobile communication network, and performs an interworking function between the IP network and the second mobile communication network connected through the signal conversion gateway; A home location register which stores information on subscribers subscribed to the first mobile communication network and also stores information on whether a number has been moved for the terminal; And Number porting server that stores routing information about the number ported terminal Including; If it is determined that the called terminal is a number ported terminal through the position inquiry to the home location register, the originating exchange exchanger obtains routing information from the number transfer server and uses the obtained routing information to obtain the routing information. Connecting a call with the called terminal belonging to the second mobile communication network through an exchange of a mobile communication network; Mobile communication system, characterized in that. The method of claim 7, wherein And the calling side exchange checks whether the called terminal number is shifted through the position inquiry of the called terminal to the home location register when the call is originated from the SIP terminal of the IP network. delete The method of claim 8, And the routing information of the mobile communication network to which the called terminal is numbered is routing information corresponding to the second mobile communication network. The method according to any one of claims 7, 8 or 10, And the originating exchange exchange unit notifies the SIP terminal through the signal conversion gateway that the call is a number transfer process when the call is connected to the called terminal. The method according to any one of claims 7, 8, or 10, The signal conversion gateway is a mobile communication system for performing a signal conversion between the SIP protocol of the SIP terminal and the ISUP protocol of the first mobile communication network. An IP network for calling through a SIP terminal; The receiving terminal receiving the outgoing call of the SIP terminal of the IP network is a mobile communication network subscribed before the number transfer, and the home location register, where the home location register stores information on the subscriber, and information on whether the number is moved to the terminal. Routing information of the mobile number network which has been ported through the number porting server, where the number porting server stores the routing information for the number ported terminal when it is confirmed that the called terminal has been number-shifted through the position inquiry to A pre-movement mobile communication network for acquiring and transmitting the outgoing call to the mobile communication network to which the called terminal has moved a number; And A mobile communication network in which the called terminal is a number-transported mobile telephone network, which transfers an outgoing call transmitted from the mobile communication network before the movement to the called terminal so that the call between the SIP terminal and the called terminal is connected. Number movement processing system comprising a. The method of claim 13, The mobile communication network before the movement, A signal conversion gateway performing call processing with the IP network; And Further comprising: an originating exchange switch performing an interworking function between the IP network and the mobile communication network after the movement; And the originating exchange switch connects a call with the called terminal belonging to the mobile communication network using the routing information obtained from the number mobile server.

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