KR100683377B1 - System and method for processing voice called signal by number portability service - Google Patents

Abstract

A method, an apparatus and a system for processing a voice incoming call according to a number portability service between 2G and 3G mobile communication networks are provided to reduce delay in call processing and a system load by performing a protocol conversion process when number portability is processed. An 2G-MSC(Second-Generation Mobile Switching Center)(130) receives an origination signal for calling a termination subscriber who has performed number portability from a 2G communication network(100) to a 3G communication network(200) from a 2G origination subscriber terminal(110). An FNPS(Flexible Number Portability Server)(300) checks whether the termination subscriber has performed number portability, and if so, the FNPS(300) requests location information of the termination subscriber from a 3G HLR(Home Location Register)(250). The 3G HLR(250) checks location information of the termination subscriber and transfers extracted location information to the 2G-MSC(130).

Description

Method and apparatus for processing voice incoming call according to number portability service between 2nd and 3rd generation mobile communication networks {System and method for processing voice called signal by number portability service}

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a configuration diagram of a communication network in which the present invention is realized.

2 is a flowchart of number portability call processing in the first embodiment according to the present invention.

3 is a call processing flowchart showing a modification of the first embodiment according to the present invention.

4 is a flowchart of number portability call processing in a second embodiment according to the present invention.

5 is a flowchart of number portability call processing in a third embodiment according to the present invention.

6 is a flowchart of number portability call processing in the fourth embodiment according to the present invention.

7 is a flowchart of number portability call processing in the fifth embodiment according to the present invention.

8 is a flowchart of number portability call processing in the sixth embodiment according to the present invention.

9 is a functional block diagram of a number portability processing apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100 ... 2 Generation Network 200 ... 3 Generation Network

300 ... Number portability processing unit

The present invention relates to a number portability service in a mobile communication network environment. More specifically, the present invention relates to a method for processing voice incoming calls according to number portability services between a 2nd generation communication network and a 3rd generation communication network or a mobile communication service provider.

The recent rapid development of mobile communication technology has rapidly promoted the popularization of mobile communication terminals, transforming our lives so that most ordinary people always carry mobile communication terminals such as mobile phones and PDAs. The mobile communication terminal has an effect of allowing the user to more easily access the communication network while efficiently allocating system resources of the conventional communication system.

The development of the mobile communication technology is progressing from the second generation mobile communication technology of the CDMA method and the GSM method to the third generation mobile communication technology such as the WCDMA method and the CDMA2000 method. It is expected that subscribers who used a communication network based on the existing second generation mobile communication technology will move to a communication network based on the newly implemented third generation mobile communication technology. Accordingly, subscribers using the existing second generation communication network are newly registered with the telephone number according to the third generation communication network in order to use the third generation communication network.

Thus, the subscribers who used the existing telephone numbers have to bear the inconvenience of changing the telephone number by changing the telephone number in order to use the third generation communication network. In order to solve this problem, a number portability processing method using the 3G network service has emerged while maintaining the existing phone number.

The number portability processing method includes a call forwarding method and an intelligent network method. The dual call forwarding method is a relatively easy method to implement, and is mainly used for local telephone number portability processing. Next, the intelligent network method is a method that requires a change in the carrier network, and is used in the mobile phone number portability processing method. The intelligent network method used in the number portability processing method between mobile communication providers is a method of supporting number portability by constructing NPDB (Number Portability Database) system. In this method, all calls are handled in a normal procedure, but the call processing of the number ported subscriber is handled specially through the intelligent network.

However, some problems arise when the number portability processing between the 2nd generation network and the 3rd generation network is performed using a conventional method of number portability between operators. First, a number portability database (NPDB) used in a second generation communication network stores a mobile directory number (MDN) and a routing number of a number portability service subscriber. However, in the 3rd generation communication network, two kinds of mobile numbers are used to distinguish subscribers: mobile station ISDN number (MSISDN) and international mobile station identity (IMSI). Therefore, in order to process the subscriber number ported from the second generation communication network to the third generation communication network using the existing number portability method, there is a problem that it is difficult to distinguish the subscribers because the number format is different between the second generation network and the third generation communication network.

In addition, using the conventional method, the home location register of the second generation communication network is inquired at the switchboard of the second generation communication network, the number porting query is made to the NPDB system when the number is transferred, and if the number is transferred to the third generation communication network, the third generation communication network is again used. There is a problem that a complex call processing process such as setting up a call and querying a home location register of a 3G communication network is performed accordingly. In particular, in this process, the protocols used in the 2nd and 3rd generation networks are different from each other, which causes compatibility problems due to communication of call processing and information data during number portability processing.

That is, in the conventional method, since the call processing traffic increases, the load of the system related to the call processing increases, so that the burden of the system increase due to the number porting process increases, and the call connection time increases due to the increase of call processing traffic. There is.

The present invention has been made to solve the above problems, and simplifies the complicated call processing procedure when processing the number portability service of voice incoming call between the 2nd generation network and the 3rd generation network, and the telephone housed in the 3rd generation network home location register. The purpose is to enable number porting services to be handled even if the number formats are different.

In addition, an object of the present invention is to provide an apparatus and a system and a method thereof capable of simultaneously performing existing number portability voice incoming call processing.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the appended claims.

In order to achieve the above object, a voice call processing system for providing number portability between a second generation network and a third generation communication network according to the first aspect of the present invention comprises: a third generation in a second generation communication network from a second generation originating subscriber terminal; A second generation outgoing exchange (2G-MSC) which receives an outgoing call for the called subscriber who has been ported to the communication network and routes it to the corresponding third generation destination exchange; A third generation home location for determining the number portability of the called subscriber according to the incoming inquiry request from the second generation originating exchange and accommodating the called subscriber when the called subscriber moves from a second generation communication network to a third generation communication network; A number porting device (FNPS) for requesting location information of the called subscriber to a register; And a third generation home location register (3G-HLR) for inquiring the location information of the called subscriber according to the location information request of the number portability processing device and transferring the extracted location information to the second generation originating exchange.

In addition, a method for processing a voice call for calling a third generation called subscriber whose number is transferred from the second generation communication network to the third generation communication network according to the second aspect of the present invention,

(1) receiving, at the originating mobile switch of the second generation communication network, a voice call calling the called subscriber from the second generation originating subscriber;

In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network,

(2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call;

(3) Routing information of the dual stack third generation home location register accommodating the called subscriber in order to query the location information of the called subscriber when the called subscriber moves from the second generation communication network to the third generation communication network. Extracting;

(4) requesting location information of the called subscriber to the third generation home location register (at this time, replacing the originating signal point of the location information request message with the signal point of the second generation communication network originating mobile switch);

(5) extracting, by the third generation home location register, location information of the called subscriber and transmitting it to the calling mobile switch;

(6) forwarding the voice call to the corresponding third generation destination exchange based on the location information at the calling mobile switch.

According to a third aspect of the present invention, there is provided a method for processing a voice call for calling a third generation called subscriber whose number is transferred from a second generation communication network to a third generation communication network.

(1) receiving, at the originating mobile switch of the second generation communication network, a voice call calling the called subscriber from the second generation originating subscriber;

In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network,

(2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call;

(3) When the called subscriber has ported number from the 2nd generation communication network to the 3rd generation communication network, routing information of the 3rd generation home location register accommodating the called subscriber is extracted to query the location information of the called subscriber. Doing;

(4) requesting the location information of the called subscriber to the third generation home location register (wherein the location information request message is converted to conform to the third generation communication network protocol so that the third generation home location register can be recognized);

(5) extracting, by the third generation home location register, location information of the called subscriber and transmitting it to the number mobile device;

(6) converting, from the number mobile device, the location information response message transmitted from the third generation home location register according to the second generation communication network protocol and transmitting the converted location information response message to the second generation calling party mobile exchange;

(7) forwarding the voice call to the corresponding third generation destination exchange based on the location information at the originating mobile exchange.

A voice call signal processing system for providing number portability between a second generation communication network and a third generation communication network according to a fourth aspect of the present invention includes: a called subscriber who has moved a number from a second generation originating subscriber terminal to a second generation communication network in a third generation communication network; A second generation originating exchange (2G-MSC) which receives the calling outgoing call and routes it to the corresponding second generation terminating exchange; A second generation home location for determining the number portability of the called subscriber according to the incoming inquiry request from the second generation originating exchange and accommodating the called subscriber when the called subscriber moves from a third generation communication network to a second generation communication network; A number porting apparatus (FNPS) for requesting location information of the called subscriber to a register; And a second generation home location register (2G-HLR) that inquires the location information of the called subscriber and responds to the second generation originating exchange to the extracted location information according to the location information request of the number portability processing apparatus.

A method for processing a voice call for calling a second generation called subscriber whose number is transferred from a third generation communication network to a second generation communication network according to a fifth aspect of the present invention,

(1) receiving, at the originating mobile switch of the second generation communication network, a voice call calling the called subscriber from the second generation originating subscriber;

In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network,

(2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call;

(3) When the called subscriber has ported a number from the 3rd generation communication network to the 2nd generation communication network, routing information of the 2nd generation home location register accommodating the called subscriber is extracted to query the location information of the called subscriber. Doing;

(4) requesting location information of the called subscriber to the second generation home location register (at this time, replacing the originating signal point of the location information request message with the signal point of the second generation communication network originating mobile switch);

(5) extracting, by the second generation home location register, location information of the called subscriber and transmitting it to the calling mobile switch;

(6) forwarding the voice call to the corresponding second generation destination exchange based on the location information at the originating mobile exchange.

A voice call signal processing system for providing number portability between a second generation communication network and a third generation communication network according to a sixth aspect of the present invention includes: a called subscriber who has a number shifted from a third generation originating subscriber terminal to a third generation communication network in a second generation communication network; A third generation originating exchange (3G-MSC) which receives the calling outgoing call and routes it to the corresponding third generation terminating exchange; A third generation home location that determines whether the called subscriber is number portable according to an incoming inquiry request from the third generation originating exchange, and accepts the called subscriber when the called subscriber moves from a second generation communication network to a third generation communication network; A number porting apparatus (FNPS) for requesting location information of the called subscriber to a register; And a third generation home location register (3G-HLR) that inquires the location information of the called subscriber and responds to the third generation originating exchange to the extracted location information according to the location information request of the number portability processing apparatus. .

According to a seventh aspect of the present invention, there is provided a method for processing a voice call for calling a third generation called subscriber whose number is transferred from a second generation communication network to a third generation communication network.

(1) receiving a voice call calling the called subscriber from the third generation calling subscriber at the calling mobile switch in the third generation communication network;

In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network,

(2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call;

(3) When the called subscriber has ported number from the 2nd generation communication network to the 3rd generation communication network, routing information of the 3rd generation home location register accommodating the called subscriber is extracted to query the location information of the called subscriber. Doing;

(4) requesting location information of the called subscriber to the third generation home location register (at this time, replacing the originating signal point of the location information request message with the signal point of the third generation telecommunication network originating mobile switch);

(5) extracting, by the third generation home location register, location information of the called subscriber and transmitting it to the calling mobile switch;

(6) forwarding the voice call to the corresponding third generation destination exchange based on the location information at the calling mobile switch.

The voice call signal processing system for providing number portability between a second generation communication network and a third generation communication network according to an eighth aspect of the present invention includes: a called subscriber who has moved a number from a third generation originating subscriber terminal to a second generation communication network in a third generation communication network; A third generation outgoing exchange (3G-MSC) which receives the calling outgoing call and routes it to the corresponding second generation destination exchange; A second generation home location for determining the number portability of the called subscriber according to the incoming inquiry request from the third generation originating exchange and accommodating the called subscriber when the called subscriber moves from a third generation communication network to a second generation communication network; A number porting apparatus (FNPS) for requesting location information of the called subscriber to a register; And a second generation home location register (3G-HLR) for inquiring the location information of the called subscriber according to the location information request of the number portability processing device and delivering the extracted location information to the originating exchange.

According to a ninth aspect of the present invention, there is provided a method of processing a voice call for calling a second generation called subscriber whose number is transferred from a third generation communication network to a second generation communication network.

(1) receiving a voice call calling the called subscriber from the third generation calling subscriber at the calling mobile switch in the third generation communication network;

In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network,

(2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call;

(3) Routing information of the dual stack second generation home location register accommodating the called subscriber in order to query the location information of the called subscriber when the called subscriber moves from the third generation communication network to the second generation communication network. Extracting;

(4) requesting location information of the called subscriber to the second generation home location register (at this time, replacing the originating signal point of the location information request message with the signal point of the third generation telecommunication network originating mobile switch);

(5) extracting, by the second generation home location register, location information of the called subscriber and transmitting it to the calling mobile switch;

(6) forwarding the voice call to the corresponding second generation destination exchange based on the location information at the originating mobile exchange.

According to a tenth aspect of the present invention, there is provided a method for processing a voice call for calling a second generation called subscriber whose number is transferred from the third generation communication network to the second generation communication network.

(1) receiving a voice call calling the called subscriber from the third generation calling subscriber at the calling mobile switch in the third generation communication network;

In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network,

(2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call;

(3) When the called subscriber has ported a number from the 3rd generation communication network to the 2nd generation communication network, routing information of the 2nd generation home location register accommodating the called subscriber is extracted to query the location information of the called subscriber. Doing;

(4) requesting the location information of the called subscriber to the second generation home location register (wherein the location information request message is converted according to the second generation communication network protocol so that the second generation home location register can be recognized);

(5) extracting, by the second generation home location register, location information of the called subscriber and transmitting it to the number mobile device;

(6) converting, from the number mobile device, the location information response message transmitted from the second generation home location register according to the third generation communication network protocol and transmitting the converted location information response message to the third generation calling party mobile exchange;

(7) forwarding the voice call to the corresponding second generation destination exchange based on the location information at the calling mobile switch.

A method for processing a voice call for calling a called subscriber whose number is transferred to a third-party carrier network by the second generation calling subscriber according to the eleventh aspect of the present invention,

(1) receiving, at the originating mobile switch of the second generation communication network, a voice call calling the called subscriber from the second generation originating subscriber;

In the number porting device for interfacing the number porting procedure between the second generation communication network and the third party communication network,

(2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call;

(3) extracting routing information of the called party network to establish a call of the called party when the called party number is transferred to a third party communication network;

(4) sending the routing information to the calling mobile switch;

(5) forwarding the voice call to the corresponding third party communication network based on the routing information in the calling mobile switching center.

A method for processing a voice call for calling a called subscriber whose number is transferred to a third-party provider network by the third generation calling subscriber according to the twelfth aspect of the present invention,

(1) receiving a voice call calling the called subscriber from the third generation calling subscriber at the calling mobile switch in the third generation communication network;

In the number porting device for interfacing the number porting procedure between the third generation communication network and the third party communication network,

(2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call;

(3) extracting routing information of the called network to set up a call of the called subscriber when the called subscriber has been ported from a third generation communication network to a third party communication network;

(4) sending the routing information to the calling mobile switch;

(5) forwarding the voice call to the corresponding third party communication network based on the routing information in the calling mobile switching center.

Apparatus for providing a number porting service between an originating mobile switch according to a thirteenth aspect of the present invention and a home location register for receiving incoming subscribers numbered from a second generation communication network to a third generation communication network or from a third generation communication network to a second generation communication network Means for recording subscriber information, including subscriber telephone number (MSISDN), terminal number (IMSI), and subscriber's number porting information and routing information of a home location register for accommodating the subscriber who has moved the number; Means for determining whether or not the called subscriber is to be ported with reference to the recording means as the voice call calling the called subscriber is received from the calling mobile switch; And when the called subscriber is identified as a number portable subscriber, routing to the corresponding home location register according to the routing information of the recording means, and requesting the home location register to request the location information of the called subscriber.

According to a fourteenth aspect of the present invention, there is provided a method for routing a voice call for calling a called party whose number is moved from a second generation communication network to a third generation communication network or from a third generation communication network to a second generation communication network.

(a) receiving a request for routing a voice call including a called number from an originating mobile switch;

(b) confirming whether or not the called subscriber is ported based on the called number;

(c) extracting routing information of a home location register that accommodates the called subscriber when the called subscriber is a number mobile subscriber;

(d) requesting location information of the called subscriber to the home location register.

In this case, if the calling mobile switch and the home location register belong to different communication networks, and the home location register cannot recognize another protocol, receiving the location information of the called subscriber from the home location register; The method may further include converting the location information into a protocol suitable for the calling mobile switch and transmitting the converted location information to the calling mobile switch.

When the home location register belongs to a third generation communication network, when the location information request is made, the destination number is replaced by a subscriber's telephone number (MSISDN) or a terminal number (IMSI) according to the number format accommodated in the home location register. The process further includes.

According to a fifteenth aspect of the present invention, a recording medium having recorded thereon a program for routing a voice call for calling a called party whose number has been transferred from a second generation communication network to a third generation communication network or from a third generation communication network to a second generation communication network is (a). Receiving a routing request for a voice call including a called number from an originating mobile switch; (b) verifying whether the called subscriber is ported based on the called number; (c) extracting routing information of a home location register that accepts the called subscriber when the called subscriber is a number mobile subscriber; And (d) recording a program for executing a procedure for requesting the location information of the called subscriber to the home location register.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

First, FIG. 1 shows a configuration of a communication network in which the present invention is realized.

As shown in the figure, the number-portable voice incoming call processing system according to the present invention performs call processing based on intergenerational or inter-company number mobility service between the second generation communication network 100 and the third generation communication network 200. . Referring to FIG. 1, a configuration of a communication network in which the present invention is realized may include a second generation communication network 100, a third generation communication network 200, and a public switched telephone network (PSTN) connecting the two communication networks with other service provider networks. , PLMN (Public Land Mobile Network) 330, FNPS (Flexible Number Portability Server) 300, which processes number portability between the communication networks, and mobiles joined to second and third generation networks, respectively. Communication terminals 110 and 210;

The second generation communication network 100 may include a base station transceiver (BTS) 121 that wirelessly communicates with the second generation mobile communication terminal 110, and a base station controller (BSC) 122 that controls the base station 121. ); Mobile exchanger 130; NO. 7 network 140; And a home location register (HLR) 150.

The second generation wireless access network 120 serves to guarantee mobility of the second generation mobile communication terminal 110 and performs hand-off and radio resource management functions. The wireless access network 120 is composed of a base station 121 and a base station controller 122 so that the mobile communication terminal 110 uses a wireless protocol between the mobile communication terminal 110 and the mobile switch 130. 7 allows access to network 140. The base station controller 122 controls the base station 121, and assigns and releases a radio channel to the mobile communication terminal 110, transmit power control of the mobile communication terminal 110 and the base station 121, and soft handoff between cells. And hard handoff determination, transcoding and vocoding, and an operation and maintenance function for the base station 121.

The mobile exchange 130 performs basic and additional service processing, incoming and outgoing call processing of subscribers, location registration and handoff procedure processing, interworking with other networks, and the like.

The home location register 150 stores and manages subscriber information, additional service information for each subscriber, and location information of a mobile communication terminal. In particular, the home location register 150 stores profile information of the calling and called terminals. This profile information includes the subscriber's MDN (subscriber telephone number), subscribed telecommunication supplementary service information, and the like.

The No. 7 network 140 is a network for communicating information between the mobile switch 130, the home location register 150, and the number portability processing apparatus 300 using the No. 7 protocol.

The third generation communication network 200 includes a Radio Transceiver Subsystem (RTS) 221 for wireless communication with the third generation mobile communication terminal 210 and a Radio Network Controller (RNC) for controlling the base station 221 ( 222); Circuit switch 230; IP backbone network 240; And a home location register (DS-HLR) 250.

The third generation wireless access network 220 serves to guarantee the mobility of the mobile communication terminal 210 and performs hand-off and radio resource management functions. The radio access network 220 includes a base station 221 and a radio control station 222 to form an access network for connecting the mobile communication terminal 210 to a core network or a packet connection. do.

The third generation circuit switch 230 has a soft switching structure for speeding up call processing in addition to basic functions for voice calls in the existing IS-95B network. Here, soft switching is a technology capable of processing voice, data, and video signals with a high speed packet switch by upgrading a circuit switch of a conventional exchange to a software switch.

The home location register (DS-HLR) 250 stores and manages subscriber information, additional service information for each subscriber, and location information of a mobile communication terminal. In particular, the home location register 250 stores profile information of the calling and called terminals. This profile information includes the subscriber terminal's MSISDN (subscriber telephone number), IMSI (terminal number), subscribed additional service information, and the like. In particular, a USIM or UICC card is inserted into a terminal of the third generation communication network, and the terminal number (IMSI) is stored in the card. As a result, both the subscriber's telephone number and the terminal number can be used to distinguish the subscriber in the third generation communication network. Accordingly, the third generation home location register 250 receives subscriber information based on one of two types of subscriber's telephone number and terminal number.

The IP backbone network 240 is a network that exchanges information between the third generation circuit switch 230, the third generation home location register 250, and the number portability processing apparatus 300 using the NO.7 protocol. It may also be interworked using the IP protocol.

The mobile communication terminals 110 and 210 are in charge of basic call processing, location registration, and voice call arrival and departure functions. Here, the second generation terminal 110 performs the incoming and outgoing through the second generation communication network, the third generation terminal 210 performs the incoming and outgoing through the third generation communication network. Mobile communication terminals 110 and 210 according to the present invention include cellular phones, PCS (Personal Communication Service) phones, PDA phones, GSM phones, WCDMA phones, CDMA-2000 phones, DMB phones and the like.

The public switched network 330 is a network in which a plurality of exchanges are connected to form a wide area communication network. In addition, it connects the second generation communication network 100 and the third generation communication network 200 and serves as a gateway that is also connected to other mobile communication network.

The number portability processing apparatus 300 supports the number portability service between the second generation communication network 100 and the third generation communication network 200. Also, it performs number portability service with other mobile communication provider networks. The number portability processing apparatus 300 receives an incoming call request from the exchanges 130 and 230 of the second generation communication network 100 or the third generation communication network 200, and reads and retrieves information corresponding to the inquiry request by referring to an internal database. Perform the process. In addition, the processed information is provided to the corresponding exchanges 130 and 230.

9 illustrates a configuration of a number portability processing apparatus and a database according to an embodiment of the present invention.

9, the number portability processing apparatus 300 according to an embodiment of the present invention receives a request for performing number portability processing from the second generation communication network 100 or the third generation communication network 200, and is stored in advance. Referring to the number portability information database 310, processing is performed according to the request information. In addition, the number portability information database 310 stores a subscriber's telephone number and a terminal number, which is a called number for distinguishing a plurality of subscribers, according to whether the number portability (number portability between communication networks having different protocols or different Number porting between carrier network) and routing path of mobile network. In addition, the number portability processing apparatus 300 should be able to process all different protocols of the second generation communication network 100 and the third generation communication network 200. Accordingly, a protocol conversion unit capable of recognizing each protocol and converting to a different protocol may be further included. Furthermore, if the home location register of the second generation or third generation communication network can perform the dual stack home location register function that supports all protocols used in each generation, the same effect as the protocol conversion unit can be obtained. Accordingly, embodiments and modifications of the present invention will be described in detail below.

In particular, since the third generation home location register 250 receives subscriber information based on any one of the subscriber's telephone number (MSISDN) and the terminal number (IMSI), the number portability processing apparatus 300 performs the number portability processing. By referring to the database 310, the operation of substituting each other with numbers of the corresponding format according to the two criteria may be performed.

As such, the present invention provides a number portability processing apparatus 300 having a number portability information database 310 to implement a number portability service between a second generation communication network and a third generation communication network.

Hereinafter, a detailed processing procedure according to the number portability of voice incoming call between a second generation communication network and a third generation communication network or a third party communication network based on the system and technical idea of the present invention in the network in which the present invention is implemented will be described.

Example  One

The present embodiment relates to a number portability service processing method for a call originating from a second generation communication network to an incoming call to a subscriber numbered from the second generation to the third generation.

Hereinafter, this embodiment will be described in detail with reference to FIG. 2.

First, a second generation (hereinafter, referred to as 2G) network service subscriber enters a telephone number of a called subscriber who wants to connect a voice call using his originating terminal 110, and sends a call. At this time, the called subscriber is a subscriber number ported from 2G to 3G (hereinafter, 3G) communication network. Here, the number transfer means that the 2G subscriber changes the service to 3G while maintaining the phone number used in the 2G when the service is changed to 3G.

The originating 2G switch receiving the outgoing signal including the called number which is the telephone number of the called subscriber from the calling terminal 110 transmits an incoming call request message to the number portability processing apparatus (hereinafter referred to as FNPS). In this case, the incoming call request message is transmitted through the NO.7 network. (11) At this time, the NO.7 protocol is used to transmit the message through the NO.7 network, but the present invention is not limited thereto. Of course, various protocols can be used to exchange information between the exchange and the FNPS.

The FNPS that receives the incoming inquiry request message first determines whether the called subscriber has number portability. The number portability information database of the FNPS is used to determine whether the number portability is present, and based on the number portability service subscriber information stored in the database, a search is performed based on the called number included in the call request message. At this time, the subscriber information is stored the information that the recipient subscriber number ported from 2G to 3G. If it is determined whether the number portability according to the called number, extract the number ported information from 2G to 3G.

3G requests incoming information for connecting a voice incoming call to the terminal of the called subscriber according to the number porting information. Here, routing information for requesting the incoming information is read from the database. The call forwarding message is transmitted to the 3G home location register based on the read routing information. In addition, the incoming inquiry message includes an outgoing signaling point, and the outgoing signaling point is replaced with a signaling point of the second generation telecommunication network originating mobile switch. (13) In this case, when the incoming inquiry message is transmitted to the 3G home location register. Since the 3G subscriber is given two types of telephone numbers as described above, the process of replacing the called number format included in the incoming inquiry message with the telephone number (assumed to be in the IMSI format) accommodated in the 3G home location register. Do this. Here, when the 3G home location register does not provide a dual stack function, it will be described later through the following modifications. Here, the dual stack refers to a function capable of recognizing both 2G inquiry messages and 3G inquiry messages.

The 3G home location register extracts the incoming information, which is routing information to the destination exchange that manages the voice incoming call setting of the called terminal according to the received call inquiry message. The extracted call information is included in an incoming call response message as a response to the incoming call request and provided to the 2G exchanger. (14) In this case, when the 3G home location register does not provide a dual stack function, the 2G is transmitted. Since the incoming inquiry request message in is not recognized, the processing procedure is changed as in the following modification.

The 2G exchange establishes a call to the destination exchange based on the incoming information included in the received message.

As such, the present embodiment provides a method for connecting a voice call to a terminal of a subscriber who has ported numbers from 2G to 3G. Particularly, in the present embodiment, 2G is a CDMA method and 3G is a WCDMA method, but the present invention is not necessarily limited to this example. That is, the present invention can of course be applied to include both various ways of 2G and various ways of 3G.

Variant

In the first embodiment, a modified example when the 3G home location register does not provide the dual stack function will be described in detail with reference to FIG. 3.

Referring to FIG. 3, steps 21 and 22 are omitted because the same procedure as in Embodiment 1 is the same.

In step 23, the call forwarding request message is transmitted to the 3G home location register. Since the call forwarding request message used in the 2G cannot be processed by the 3G home location register, the incoming call that the 3G home location register can process in the FNPS can be processed. The message is converted into a request message and then transmitted.

Thereafter, the 3G home location register extracts incoming information according to the message to generate an incoming information response message. The incoming information response message generated in this way cannot be recognized by the 2G exchange. Accordingly, the incoming information response message is transmitted to the FNPS to convert the message into a message that can be recognized by the 2G exchanger.

In the FNPS, the incoming information response message is converted into a message that can be recognized by 2G, and then transferred to the 2G exchanger.

The 2G exchange establishes a call to the destination exchange according to the received message response message.

According to this modification, when the 3G home location register cannot recognize the incoming request message, the FNPS converts the incoming request message so that it can be recognized by the 3G home location register, and accordingly, the 3G home location register The processed incoming information response message is converted into a message that can be recognized by the calling exchange in FNPS, and then forwarded. In other words, by adding the process of converting the message format during the number portability process in the FNPS, it is possible to solve the problem of not recognizing the message according to different formats, and without the trouble of having a separate message format conversion procedure or device. Batch processing in FNPS can simplify the process and reduce the additional costs.

Example  2

A second embodiment according to the present invention will be described with reference to FIG.

Embodiment 2 relates to a number portability service processing method for allowing a call originating from 2G to be forwarded to a subscriber ported from 3G to 2G.

First, a 2G service subscriber enters a telephone number of a called subscriber who wants to connect a voice call using his calling terminal, and sends a call. At this time, the called subscriber is a subscriber who has moved from 3G to 2G.

The originating 2G switch receiving the outgoing call including the telephone number of the called subscriber from the calling terminal transmits the incoming inquiry request message to the FNPS 300.

The FNPS (300) receiving the incoming inquiry request message determines the number portability of the called subscriber by referring to the number portability information database (310), and extracts the number ported information from 3G to 2G. The extracted number porting information includes routing information for receiving an incoming call with 2G stored in the database.

The call forwarding message is transmitted to the corresponding 2G home location register according to the routing information. In this case, the 2G home location register may use the incoming inquiry message received from the 2G switch as it is, no separate message conversion work is required. Further, the originating signal point included in the incoming inquiry message is replaced by the signaling point of the originating mobile switch of the second generation communication network.

The 2G home location register extracts incoming information of the called terminal according to the incoming call request and generates an incoming call response message. The message is loaded with the incoming information. The incoming call response message thus generated is provided to the 2G exchange.

The 2G exchange establishes a call to the corresponding destination exchange based on the incoming information included in the received message.

Example  3

A third embodiment according to the present invention will be described with reference to FIG.

Embodiment 3 relates to a number portability service processing method for allowing a call originating from 3G to be forwarded to a subscriber who has ported number from 2G to 3G.

First, the 3G service subscriber enters the telephone number of the called subscriber who wants to connect the voice call using his calling terminal and makes a call. At this time, the called subscriber is a subscriber who has moved from 2G to 3G.

Receiving an outgoing call including the telephone number of the called subscriber from the calling terminal, the 3G exchange transmits an incoming call request message to the FNPS 300. At this time, the incoming call request message is transmitted through the IP backbone network. (41) The IP backbone network uses the NO.7 protocol. However, the present invention is not limited thereto, and information between the 3G exchanger and the FNPS can be exchanged. Of course, various protocols such as the IP protocol can be used.

Receiving the incoming call request message, the FNPS 300 determines the number portability of the called subscriber by referring to the number portability information database 310 and extracts the number ported information from 2G to 3G. The extracted number porting information includes routing information for receiving an incoming call with 3G stored in the database.

The call forwarding message is transmitted to the corresponding 3G home location register according to the routing information. In this case, the 3G home location register may recognize the incoming call message received from the 3G exchange, so no additional message conversion is required. Here, the incoming inquiry message includes an originating signal point, which is replaced with a signaling point of the originating mobile switch of the third generation communication network. In addition, since the 3G subscriber is given two types of telephone numbers, the process of replacing the format of the called number included in the incoming call message with the telephone number of the format accepted in the 3G home location register (assuming IMSI format) is further performed. It may include. (43)

The 3G home location register extracts incoming call information according to the incoming call request and generates an incoming call response message. The message is loaded with the incoming information. The incoming call response message thus generated is provided to the corresponding 3G exchange.

The 3G exchange establishes a call to the destination exchange based on the incoming information included in the received message.

Example  4

A fourth embodiment according to the present invention will be described with reference to FIG.

Embodiment 4 relates to a number portability service processing method such that a call originated from 3G is connected to a subscriber who has moved from 3G to 2G.

First, the 3G service subscriber enters the telephone number of the called subscriber who wants to connect the voice call using his calling terminal and makes a call. At this time, the called subscriber is a subscriber who has moved from 3G to 2G.

Upon receiving an outgoing call including the telephone number of the called subscriber from the 3G originating terminal, the 3G exchanger transmits an incoming call request message to the FNPS 300 (51).

The FNPS 300 that has received the incoming inquiry request message determines whether the called subscriber has number portability by referring to the number portability information database 310 and extracts information shifted from 3G to 2G. The extracted number porting information includes routing information for receiving an incoming call with 2G stored in the database.

The call forwarding message is transmitted to the 2G home location register according to the routing information. In this case, since the 2G home location register cannot process an incoming call request message used in 3G, the FNPS 300 further includes converting the incoming call request message to be processed by the 2G home location register. . The converted 2G incoming call request message is transmitted to the 2G home location register.

Thereafter, the 2G home location register extracts the incoming information according to the message to generate the incoming information response message. The incoming information response message thus generated is not recognized by the 3G exchange. Accordingly, the incoming information response message is transmitted to the FNPS to convert the message into a message that can be recognized by the 3G exchanger.

In the FNPS, the incoming information response message is converted into a message used by 3G, and then transferred to the 3G exchanger.

The 3G exchange establishes a call to the corresponding destination exchange based on the incoming information included in the received destination information response message.

Example  5

A fifth embodiment according to the present invention will be described with reference to FIG.

Embodiment 5 relates to a number portability service processing method for allowing a call originating from 2G to be forwarded to a 2G subscriber who has been ported to another mobile communication provider.

First, a 2G service subscriber enters a telephone number of a called subscriber who wants to connect a voice call using his calling terminal, and sends a call. At this time, the called subscriber is a 2G subscriber who has been ported to another mobile communication provider network.

The calling party 2G exchanger 130 receiving the outgoing call including the telephone number of the called party from the calling terminal transmits an incoming call request message (LOR: Location Request) to the FNPS 300. This incoming call request message is a message according to the protocol used in the 2G exchange.

The FNPS 300 that receives the incoming inquiry request message determines the number portability of the called subscriber by referring to the number portability information database 310. At this time, based on the number portability field and the routing number field corresponding to the called party, the number information is extracted to the third party network and the routing number indicating the route to the third party network is extracted. 62) In particular, the FNPS 300 may recognize the incoming call request message (LOR) transmitted from the 2G exchanger according to the protocol used by the 2G and perform the processing accordingly.

The FNPS 300 determines whether the called party is a subscriber who has moved to a third party network, and provides a routing number extracted from the database to the calling party 2G switch when the called party is a number mobile subscriber. At this time, the extracted information is recorded and transmitted (LORAck [ported, RoutingDigits]) in a call request response message (LORAck: Location Request acknowledge) according to the 2G protocol that can be recognized by the 2G exchanger.

The 2G exchange processes the voice incoming call based on the received message. That is, it recognizes that the called subscriber has been ported to another provider network according to the information contained in the message, and sets a call to the called network by using routing numbers according to the routing number (IAM: InitialAddressMessage). (64)

Example  6

A sixth embodiment according to the present invention will be described with reference to FIG.

Embodiment 6 relates to a number portability service processing method for allowing a call originating from 3G to be forwarded to a 3G subscriber who has been ported to another mobile communication provider.

First, the 3G service subscriber enters the telephone number of the called subscriber who wants to connect a voice call using his calling terminal, and makes a call. At this time, the called subscriber is a 3G subscriber who has ported to another mobile communication provider network.

The originating 3G exchanger 230 receiving the outgoing call including the telephone number of the called subscriber from the calling terminal transmits an incoming call request message (SRI: Send Routing Information) to the FNPS 300. This incoming call request message is a message according to the protocol used in the 3G exchange.

The FNPS 300 that receives the incoming inquiry request message determines the number portability of the called subscriber by referring to the number portability information database 310. At this time, based on the number portability field corresponding to the called party and the routing number field, information about the number ported to the third party network is extracted and the routing number which is the path to the third party network is extracted. In particular, the FNPS 300 may recognize the incoming inquiry request message (SRI) transmitted from the 3G exchanger according to the protocol used by the 3G and perform the processing accordingly.

The FNPS 300 determines whether the called subscriber is a number ported subscriber to a third party vendor network, and extracts a routing number from the database and provides it to the calling 3G exchange when the called subscriber is a number ported subscriber. . In this case, the extracted information is included in a call routing response message (SRIAck: Send Routing Information Acknowledge) that can be recognized by the 3G exchanger and transmitted (SRIAck [ported, RoutingDigits]).

The 3G exchange processes voice incoming calls based on the received messages. Recognizing that the called subscriber has been ported to another provider network according to the information contained in the message, and establishing a call (IAM: InitialAddressMessage) using the routing number (RoutingDigits) accordingly (74). )

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

The present invention provides an effect of reducing the processing process by performing call processing distributed between the incoming call processing and the number portability processing in the number portability processing device in the number portability processing process between the 2nd generation network and the 3rd generation communication network or another service provider network. .

In addition, the present invention provides a function of substituting two types of numbers assigned to 3G network subscribers into a form accommodated in 3G home location register. In particular, the protocol compatibility and conversion process between the 2nd generation network and the 3rd generation network can be processed together in the number portability process, thereby reducing the call processing delay and the load of the system due to unnecessary processing procedures in the number portability process between heterogeneous networks.

Claims (25)

A voice incoming call processing system for providing number portability between a second generation network and a third generation network, A second generation outgoing exchanger (2G-MSC) that receives an outgoing call for the called subscriber that has been numbered from the second generation outgoing subscriber terminal to the third generation outgoing network and routes it to a corresponding third generation destination exchange (2G-MSC); A third generation home location for determining the number portability of the called subscriber according to the incoming inquiry request from the second generation originating exchange and accommodating the called subscriber when the called subscriber moves from a second generation communication network to a third generation communication network; A number porting apparatus (FNPS) for requesting location information of the called subscriber to a register; And A third generation home location register (3G-HLR) for retrieving the location information of the called subscriber according to the location information request of the number mobile device and delivering the extracted location information to the second generation originating exchange (3G-HLR); Incoming call processing system. According to claim 1, wherein the number porting device Means for storing the subscriber's subscriber number (MSISDN), the terminal number (IMSI), the recipient's number porting information and the routing path to the third generation home location register. According to claim 2, wherein the number porting device And means for substituting a called number into a subscriber's telephone number (MSISDN) or a terminal number (IMSI) in accordance with the number format accommodated in the third generation home location register upon the location information request. According to claim 1, wherein the number porting device And means for translating the second generation network protocol and the third generation network protocol from one another. The method of claim 4, wherein The third generation home location register responds to the number porting device using the 3rd generation communication network protocol to transmit the location information of the called subscriber, and the number porting device transmits the location information to the second generation source exchanger using the second generation communication network protocol. System for delivery to. A method for processing a voice call for calling a third generation called subscriber whose number is transferred from the second generation communication network to the third generation communication network, (1) receiving, at the originating mobile switch of the second generation communication network, a voice call calling the called subscriber from the second generation originating subscriber; In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network, (2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call; (3) Routing information of the dual stack third generation home location register accommodating the called subscriber in order to query the location information of the called subscriber when the called subscriber moves from the second generation communication network to the third generation communication network. Extracting; (4) requesting location information of the called subscriber to the third generation home location register (at this time, replacing the originating signal point of the location information request message with the signal point of the second generation communication network originating mobile switch); (5) extracting, by the third generation home location register, location information of the called subscriber and transmitting it to the calling mobile switch; And (6) forwarding the voice call to the corresponding third generation destination exchange based on the location information at the originating mobile switch. A method for processing a voice call for calling a third generation called subscriber whose number is transferred from the second generation communication network to the third generation communication network, (1) receiving, at the originating mobile switch of the second generation communication network, a voice call calling the called subscriber from the second generation originating subscriber; In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network, (2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call; (3) When the called subscriber has ported number from the 2nd generation communication network to the 3rd generation communication network, routing information of the 3rd generation home location register accommodating the called subscriber is extracted to query the location information of the called subscriber. Doing; (4) requesting the location information of the called subscriber to the third generation home location register (wherein the location information request message is converted to conform to the third generation communication network protocol so that the third generation home location register can be recognized); (5) extracting, by the third generation home location register, location information of the called subscriber and transmitting it to the number mobile device; (6) converting, from the number mobile device, the location information response message transmitted from the third generation home location register according to the second generation communication network protocol and transmitting the converted location information response message to the second generation calling party mobile exchange; And (7) forwarding the voice call to the corresponding third generation destination exchange based on the location information at the originating mobile switch. The method according to claim 6 or 7, If the called number is different from the number used in the third generation home location register, replacing the called number with any one of subscriber number (MSISDN) and terminal number (IMSI). A voice incoming call processing system for providing number portability between a second generation network and a third generation network, A second generation outgoing exchanger (2G-MSC) that receives an outgoing call for the called subscriber that has been numbered from the third generation outgoing subscriber terminal to the second generation outgoing network, and routes it to a corresponding second generation destination exchange (2G-MSC); A second generation home location for determining the number portability of the called subscriber according to the incoming inquiry request from the second generation originating exchange and accommodating the called subscriber when the called subscriber moves from a third generation communication network to a second generation communication network; A number porting apparatus (FNPS) for requesting location information of the called subscriber to a register; And And a second generation home location register (2G-HLR) that inquires the location information of the called subscriber and responds to the second generation originating exchange according to the location information request of the number porting device. Voice incoming call processing system. A method for processing a voice call calling a second generation incoming subscriber whose number is transferred from the third generation communication network to the second generation communication network, (1) receiving a voice call calling the called subscriber from the second generation calling subscriber at the calling mobile switch in the second generation communication network; In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network, (2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call; (3) When the called subscriber has ported a number from the 3rd generation communication network to the 2nd generation communication network, routing information of the 2nd generation home location register accommodating the called subscriber is extracted to query the location information of the called subscriber. Doing; (4) requesting location information of the called subscriber to the second generation home location register (at this time, replacing the originating signal point of the location information request message with the signal point of the second generation communication network originating mobile switch); (5) extracting, by the second generation home location register, location information of the called subscriber and transmitting it to the calling mobile switch; And (6) forwarding the voice call to the corresponding second generation destination exchange based on the location information at the originating mobile switch. A voice incoming call processing system for providing number portability between a second generation network and a third generation network, A third generation outgoing exchange (3G-MSC) for receiving an outgoing call for a called party whose number has been transferred from the third generation outgoing subscriber terminal to the third generation communication network and routing it to a corresponding third generation destination exchange (3G-MSC); A third generation home location that determines whether the called subscriber is number portable according to an incoming inquiry request from the third generation originating exchange, and accepts the called subscriber when the called subscriber moves from a second generation communication network to a third generation communication network; A number porting apparatus (FNPS) for requesting location information of the called subscriber to a register; And And a third generation home location register (3G-HLR) that inquires the location information of the called subscriber and responds to the third generation originating exchange according to the location information request of the number mobile device. Voice incoming call processing system. A method for processing a voice call calling a third generation called subscriber whose number is originated from the second generation communication network to the third generation communication network, (1) receiving a voice call calling the called subscriber from the third generation calling subscriber at the calling mobile switch in the third generation communication network; In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network, (2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call; (3) When the called subscriber has ported number from the 2nd generation communication network to the 3rd generation communication network, routing information of the 3rd generation home location register accommodating the called subscriber is extracted to query the location information of the called subscriber. Making; (4) requesting location information of the called subscriber to the third generation home location register (at this time, replacing the originating signal point of the location information request message with the signal point of the third generation telecommunication network originating mobile switch); (5) extracting, by the third generation home location register, location information of the called subscriber and transmitting it to the calling mobile switch; And (6) forwarding the voice call to the corresponding third generation destination exchange based on the location information at the originating mobile switch. The method of claim 12, If the called number is different from the number used in the third generation home location register, replacing the called number with any one of subscriber number (MSISDN) and terminal number (IMSI). A voice incoming call processing system for providing number portability between a second generation network and a third generation network, A third generation outgoing exchange (3G-MSC) for receiving an outgoing call for a called subscriber whose number is transferred from the third generation outgoing subscriber terminal to the second generation outgoing network, and routing it to a corresponding second generation incoming exchange (3G-MSC); A second generation home location for determining the number portability of the called subscriber according to the incoming inquiry request from the third generation originating exchange and accommodating the called subscriber when the called subscriber moves from a third generation communication network to a second generation communication network; A number porting apparatus (FNPS) for requesting location information of the called subscriber to a register; And A second generation home location register (2G-HLR) for inquiring the location information of the called subscriber according to the location information request of the number porting device and delivering the extracted location information to the third generation originating exchange (2G-HLR); Incoming call processing system. A method of processing a voice call for calling a second generation called subscriber whose number is originated from the third generation communication network to the second generation communication network, (1) receiving a voice call calling the called subscriber from the third generation calling subscriber at the calling mobile switch in the third generation communication network; In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network, (2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call; (3) Routing information of the dual stack second generation home location register accommodating the called subscriber in order to query the location information of the called subscriber when the called subscriber moves from the third generation communication network to the second generation communication network. Extracting; (4) requesting location information of the called subscriber to the second generation home location register (at this time, replacing the originating signal point of the location information request message with the signal point of the third generation telecommunication network originating mobile switch); (5) extracting, by the second generation home location register, location information of the called subscriber and transmitting it to the calling mobile switch; And (6) forwarding the voice call to the corresponding second generation destination exchange based on the location information at the originating mobile switch. A method of processing a voice call for calling a second generation called subscriber whose number is originated from the third generation communication network to the second generation communication network, (1) receiving a voice call calling the called subscriber from the third generation calling subscriber at the calling mobile switch in the third generation communication network; In the number porting device for interfacing the number porting procedure between the second generation and third generation communication network, (2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call; (3) When the called subscriber has ported a number from the 3rd generation communication network to the 2nd generation communication network, routing information of the 2nd generation home location register accommodating the called subscriber is extracted to query the location information of the called subscriber. Doing; (4) requesting the location information of the called subscriber to the second generation home location register (wherein the location information request message is converted according to the second generation communication network protocol so that the second generation home location register can be recognized); (5) extracting, by the second generation home location register, location information of the called subscriber and transmitting it to the number mobile device; (6) converting, from the number mobile device, the location information response message transmitted from the second generation home location register according to the third generation communication network protocol and transmitting the converted location information response message to the third generation calling party mobile exchange; And (7) forwarding the voice call to the corresponding second generation destination exchange based on the location information at the originating mobile switch. A method for processing a voice call calling a second-generation called subscriber whose number is transferred to a third-party carrier network by a second-generation calling party, (1) receiving, at a calling mobile switch in a second generation communication network, a voice call calling the called subscriber from the second generation calling subscriber; In a number porting device that interfaces the number porting procedure between different service provider networks, (2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call; (3) extracting routing information of the called party network to establish a call of the called party when the called party number is transferred to a third party communication network; (4) sending the routing information to the calling mobile switch; And (5) forwarding the voice call to a corresponding third party network based on the routing information at the originating mobile switch. A method for processing a voice call for calling a third generation called subscriber whose number is originated from a third generation calling party network. (1) receiving a voice call calling the called subscriber from the originating subscriber at the originating mobile switch in the third generation communication network; In a number porting device that interfaces the number porting procedure between different service provider networks, (2) determining, by the calling mobile switching center, whether the called subscriber has number portability using a called number included in the voice call; (3) extracting routing information of the called party network to establish a call of the called party when the called party number is transferred to a third generation communication network of a third party provider; (4) sending the routing information to the calling mobile switch; And (5) forwarding the voice call to a corresponding third party network based on the routing information at the originating mobile switch. An apparatus for providing a number porting service between an originating mobile switch and a home location register for receiving a subscriber who has ported a number from a second generation communication network to a third generation communication network or a third generation communication network, Means for recording subscriber information, including subscriber telephone number (MSISDN), terminal number (IMSI), and subscriber's number porting information and routing information of a home location register for accommodating the numbered subscriber; Means for determining whether or not the called subscriber is to be ported with reference to the recording means as the voice call calling the called subscriber is received from the calling mobile switch; And when the called subscriber is determined to be a number ported subscriber, routing to a corresponding home location register according to the routing information of the recording means, and requesting the home location register for location information of the called subscriber. The method of claim 19, When the calling mobile switch and the home location register belong to different communication networks, and the home location register cannot recognize a different protocol, And means for receiving the location information of the called subscriber from the home location register, converting the received subscriber location information into a protocol suitable for the calling mobile switch, and transmitting the converted location information. The method of claim 19 or 20, If the home location register belongs to the third generation communication network, And means for substituting a called number into a subscriber's telephone number (MSISDN) or a terminal number (IMSI) according to the number format accommodated in the home location register when the location information request is made. A method of routing a voice call to a called subscriber who has been numbered from a second generation communication network to a third generation communication network or from a third generation communication network to a second generation communication network, (a) receiving a request for routing a voice call including a called number from an originating mobile switch; (b) confirming whether or not the called subscriber is ported based on the called number; (c) extracting routing information of a home location register that accommodates the called subscriber when the called subscriber is a number mobile subscriber; (d) requesting location information of the called subscriber to the home location register. The method of claim 22, When the calling mobile switch and the home location register belong to different communication networks, and the home location register cannot recognize a different protocol, Receiving the location information of the called subscriber from the home location register; Converting the location information into a protocol suitable for the calling mobile switch and forwarding the location information to the calling mobile switch. The method of claim 22 or 23, If the home location register belongs to the third generation communication network, And replacing the called number with a subscriber's telephone number (MSISDN) or a terminal number (IMSI) according to the number format accommodated in the home location register when the location information is requested. A recording medium having recorded thereon a program for routing a voice call for calling a called subscriber numbered from a second generation communication network to a third generation communication network or from a third generation communication network to a second generation communication network. (a) receiving a routing request for a voice call including a called number from an originating mobile switch; (b) checking whether the called party has been ported based on the called number; (c) extracting routing information of a home location register that accepts the called subscriber when the called subscriber is a number mobile subscriber; And (d) a computer-readable recording medium having recorded thereon a program for executing a procedure for requesting location information of the called subscriber to the home location register.

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