KR100660291B1 - Plus Code Dialing Service System and Method thereof using Feature Code - Google Patents

Abstract

Disclosed are a plus code dialing service system using a feature code based on a CDMA network, and a method thereof. To this end, the mobile terminal receives the feature code, the country code and the recipient's telephone number and attempts to send; An exchange by the exchange to transmit the feature code to a signaling service provider server; Transmitting, by the signal relaying operator server, the international telephone operator identification code of the country where the mobile terminal roams to the exchange based on the feature code; And setting up, by the exchange, an international call based on the international telephone operator identification code, so that CDMA network-based mobile terminal subscribers can easily use international calls through the feature code, thereby enhancing convenience for the subscribers. Let's do it.

Plus code, feature code, international roaming, international carrier identification code

Description

Plus Code Dialing Service System and Method Using Feature Code

1 is a block diagram showing an international roaming service system based on a general CDMA network.

2 is a flowchart illustrating a general CDMA network based international roaming service method.

3 is a block diagram illustrating a plus code dialing service system using a CDMA network-based feature code according to an embodiment of the present invention.

4 is a flowchart illustrating a method of plus code dialing service using a CDMA network-based feature code according to an embodiment of the present invention.

* Explanation of Codes on Major Parts of Drawings *

100: mobile terminal

730: exchanger

800: Interworking Interoperability Unit (IIU)

The present invention relates to an international roaming service system, and more particularly, to a plus code dialing service system using a feature code and a method thereof.

The subscriber of the GSM network-based mobile terminal makes an international call after pressing "+" or "00" on the mobile terminal without pressing a specific operator identification number. That is, a GSM network-based mobile terminal subscriber can make an international call with only "+" or "00" without having to memorize identification codes of international telephone operators.

As such, in a GSM network where international roaming is enabled, the Plus Code Dialing function provides considerable convenience to roaming users. Accordingly, no matter what roaming call to any country, the subscribers of GSM network-based mobile terminals do not need to inquire or memorize each country's international telephone operator identification code.

However, in case of international roaming based on CDMA network, international telephone operator identification numbers different for each country and operator, for example, "001", "002", "00700", "008", etc. in Korea, "00", In the United States, "001" is assigned, and in Japan, "009130," etc., roaming service users must remember each country's international telephone operator identification code.

Hereinafter, the subscriber registration for the general roaming service based on the general CDMA network and the calling procedure according to the prior art will be described in more detail.

1 is a block diagram showing an international roaming service system based on a CDMA network according to the prior art.

As shown in FIG. 1, an interworking interoperability unit (IIU) 300 for performing signal network relay between mobile communication providers for international roaming service; Mobile telephone network 200; A mobile terminal 100 wirelessly connected to the mobile telephone network 200; And when the mobile terminal 100 performs the international roaming and the outgoing call, the international telephone operator gateway to analyze the country code of the calling number to perform the call set-up (Call Set Up) of the country's international telephone operator gateway ( 400).

The mobile telephone network 200 includes a base station (BSC, 210), switchboard (MSC, 220); And a signal relay station (STP) 230 for converting a signal transmitted from the switch 220 to the IIU 300 into a signal suitable for the IIU 300.

Hereinafter, a subscriber registration method for a general CDMA network-based international roaming service and a call procedure according to the prior art will be described with reference to FIG. 2.

1) General location registration

First, the mobile terminal 100 of the subscriber roaming abroad attempts to register the location with the switch 220 for a call (S201). Then, the exchange 220 identifies the International Roaming MIN (IRM) of the mobile terminal 100, determines that it is a roaming subscriber, and transmits a Registration_Request message to the IIU 300 (S202).

The IIU 300 analyzes the IRM in the registration request message to determine the HLR signal point with the home operator of the corresponding subscriber, and then transmits the registration request message to the corresponding HLR (not shown) (S203).

Subsequently, when it is determined that the MIN and ESN in the registration request message are normal subscribers capable of roaming abroad by comparing their profile, the HLR returns a Registration_Request return result message to the IIU 300 ( S204).

Accordingly, the IIU 300 returns the response message to the corresponding exchange 220 (S205). As a result, the mobile terminal 100 successfully completes the location registration.

2) Calling Procedure

After the step 205, the mobile terminal 100, the location registration is completed, attempts to make an international call using the international telephone identification code of the receiving terminal (not shown) operator (S206). For example, after registering a location in Japan, in order to perform a call to a SKT subscriber (telephone number 011-111-1234) in Korea, the following number should be entered.

009130-82-11-111-1234,

Here, 009130 corresponds to an international telephone operator number (eg, KDDI) for outgoing calls from Japan, 82 corresponds to a country code of Korea, and the rest corresponds to a receiver's phone number.

Accordingly, the exchange 220 routes the ISUP O / B message to the corresponding international telephone service provider (eg, KDDI), and the international telephone service provider analyzes the country code among the dialed numbers to check the gateway of the international telephone service of the corresponding country. Attempt to call setup by routing to the station 400 (S207).

However, as in step 206, users of CDMA network-based international roaming service have to memorize each country's international telephone operator identification code (eg, 009130).

Therefore, CDMA network-based international roaming service users may cause difficulties in sending the first international call through international roaming, and furthermore, the number of call users decreases from the perspective of the mobile communication service provider.

In addition, in order to provide a plus code such as GSM, there is a problem in that a burden of changing both a mobile terminal and a core network system is generated.

An object of the present invention is to provide a plus code dialing service system and a method using a feature code capable of dialing an international call through a plus code in a CDMA network according to internationalization.

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In order to achieve the above object, the plus code dialing service method using a CDMA network-based feature code according to an embodiment of the present invention, (a) the mobile terminal receives the feature code, country code and the recipient's telephone number to make a call; Attempting; (b) the exchange transmitting the feature code to a signaling service provider server; (c) transmitting, by the signal relaying provider server, the international telephone operator identification code of the country where the mobile terminal roams to the exchange based on the feature code; And (d) the exchange setting up the international call based on the international call operator identification code.
In addition, the plus code dialing service method using a CDMA network-based feature code according to another embodiment of the present invention, the method comprising the steps of: (a) performing the subscriber location registration when the mobile terminal roaming abroad; (b) the mobile terminal receiving a feature code, a country code and a recipient's telephone number and attempting to make a call; (c) the exchange including the feature code dialed by the mobile terminal in a feature request message and transmitting the feature code to a signaling service provider server; (d) receiving, by the signaling service provider server, the feature request message and transmitting a response message to the exchange including an international telephone operator identification code and a dialed telephone number of a country where the mobile terminal roams; And (e) the exchange receiving the response message and attempting to set up an ISUP (ISDN User Part) with the corresponding international telephone provider, and then setting up an international telephone.

On the other hand, the plus code dialing service system using a CDMA network-based feature code according to an embodiment of the present invention, including the dialed feature code in the feature request message when the mobile terminal originating, the response message to the feature request message An exchange to receive and set up an international call with a corresponding international call operator; And after receiving the feature request message transmitted from the exchange, analyzing the feature code included in the message, and identifying the international telephone operator of the country in which the mobile terminal roams when the feature code is a feature code for international call transmission. And a signal relaying service provider server which includes a code and a dialed telephone number in a response message and transmits the code to the exchange.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. In particular, in the embodiment of the present invention, the location registration process during international roaming of the mobile terminal subscriber is the same as the process of step 201 to step 205 of FIG. 2 described above, a detailed description of the location registration process will be omitted. Like reference numerals denote like elements in FIG. 1.

3 is a block diagram illustrating a plus code dialing service system using a CDMA network-based feature code according to an embodiment of the present invention.

As shown in Fig. 3, the system is generally similar to the system shown in Fig. 1, but differs only in the exchange (MSC) 730 and IIU 800.

The exchange 730 performs plus code dialing by using a feature request message. The feature request message is used for voicemail listening, one time CE cancellation, and other supplementary service registration changes. Accordingly, in the present embodiment, the switch 730 transmits the feature code dialed when the mobile terminal 100 transmits the message to the IIU 800 by including the feature code in the Feature_Request message, and the IIU 800 includes the feature code. After receiving the response message (Feature_Request return result) sent from the analysis of the termination list (termination list) included in the response message to attempt to set up the ISUP (ISDN User Part) with the relevant international telephone provider, and sets up the international call.

The IIU 800 requires that operators that want to implement a plus code dialing service using a feature code must designate an international telephone code for international roaming users in advance in the service provider, and include a database for storing the international phone code for each service provider. do. Thus, IIU 800 further performs maintenance of the database. Accordingly, in the embodiment according to the present invention, the IIU 800 receives the feature request message transmitted from the exchange 730, and then analyzes the feature code included in the message to generate an international call. In the case of a credit feature code, the service provider's international telephone code and dialed telephone number are included in a termination list parameter, and the parameter is included in a response (Feature_Request return result) message and transmitted to the exchange 730. do.

Hereinafter, a plus code dialing service method using a feature code according to an embodiment of the present invention will be described with reference to FIG. 4.

4 is a flowchart illustrating a plus code dialing service method using a CDMA network based feature code according to an embodiment of the present invention.

First, when a subscriber roaming abroad completes subscriber registration as in steps 201 to 205, the subscriber attempts to make a call by inputting a feature code, a country code, and a recipient's telephone number to the mobile terminal 100 (S401). As a prerequisite for this, operators to provide a plus code dialing service using a feature code should allocate a specific feature code so that it does not conflict with other services, and usage instructions thereof should be announced to subscribers in advance. For example, if an international call using the feature code is roaming to Japan and then calling a 011-111-1234 subscriber in Korea, buttons such as * 99-82-11-111-1234 should be sequentially pressed. In this case, * 99 is a feature code and may be different for each operator.

Then, the exchange 730 includes the feature code dialed by the mobile terminal 100 in the feature request message and transmits it to the IIU 800 (S402).

The IIU 800 analyzes the feature code included in the message after receiving the feature request message transmitted from the exchange 730. That is, when the IIU 800 refers to the database, it can be seen that the feature code * 99 pressed by the caller is for the international call of the SKT subscriber.

As a result of the analysis, when the feature code is a feature code for making an international call, a serving international call code and a dialed telephone number of a corresponding country are included in a termination list parameter, and the parameter is answered. Request return result) is included in the message and transmitted to the exchange (730) (S403). In this case, if the operator's international telephone code of the corresponding country is Japan's KDDI, 009130 is applicable. Since the dialed telephone number is 82-11-111-1234, 009130-82-11-111-1234 is included in the termination list.

Accordingly, the exchange 730 receives a response (Feature_Request return result) message transmitted from the IIU 800, analyzes a termination list included in the response message, and sends an ISUP (ISDN) to the corresponding international telephone service provider. After setting the User Part), set up an international call (S404). That is, after analyzing 009130-82-11-111-1234 included in the termination list, the 009130 is attempted to set up the call with the corresponding international telephone operator (KDDI), and the international telephone operator (KDDI) reports 82. Recognizing that it is Korea, it is trying to set up again as an international phone operator in Korea.

While the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will recognize that various modifications or changes can be made without departing from the spirit and scope of the invention.

As described above, according to the present invention, since CDMA network-based mobile terminal subscribers can easily use international calls through feature codes, there is an effect of increasing convenience for the subscribers.

In addition, according to the present invention, since the CDMA network-based mobile communication operators can easily use the international telephone through the previously implemented feature code, the development cost can be greatly reduced.

Claims (10)

In a plus code dialing service system using a feature code based on a CDMA network, An exchanger for including a dialed feature code in a feature request message when the mobile terminal originates, and receiving a response message for the feature request message and setting up an international call with a corresponding international telephone operator; And After receiving the feature request message sent from the exchange, the feature code included in the message is analyzed and the feature code is an international call operator identification code of the country where the mobile terminal roams. And a code relay service provider server including a dialed telephone number in a response message and transmitting the dialed telephone number to the exchange. According to claim 1, The signal relay provider server, Plus code dialing service system using a feature code, characterized in that it further comprises a database for storing feature codes for each international telephone operator. The method of claim 1 or 2, wherein the feature request message The plus code dialing service system using the feature code, characterized in that it comprises the feature code, the recipient country identification code and the recipient telephone number. The method of claim 1 or 2, wherein the response message Plus code dialing service system using a feature code, characterized in that it comprises an international telephone operator identification code, a recipient country identification code and a recipient phone number of the roaming country. A plus code dialing service method using a feature code based on a CDMA network, (a) performing mobile subscriber registration while roaming overseas; (b) the mobile terminal receiving a feature code, a country code and a recipient's telephone number and attempting to make a call; (c) transmitting, by a switch to which the mobile terminal is wirelessly connected, a feature code dialed by the mobile terminal in a feature request message to a signaling service provider server; (d) receiving, by the signaling service provider server, the feature request message and transmitting a response message to the exchange including an international telephone operator identification code and a dialed telephone number of a country where the mobile terminal roams; And (e) the exchange receives the response message and attempts to set up an ISUP (ISDN User Part) as a call control setting to the corresponding international telephone operator, and then sets up an international telephone. Code dialing service method. The method of claim 5, wherein step (d) (d-1) receiving the feature request message and analyzing a feature code; (d-2) if the feature code is a feature code for making an international call, including, in the termination list parameter, an international telephone operator identification code and a dialed telephone number of a country where the mobile terminal roams; (d-3) including the termination list parameter in the response message; And and (d-4) transmitting the response message to the exchange. The method of claim 5 or 6, wherein step (e) (e-1) the exchange receiving the response message; (e-2) extracting an international telephone operator identification code of the corresponding country by analyzing the termination list included in the response message; And (e-3) plus code dialing using a feature code, comprising attempting to set up ISUP (ISDN User Part), which is a call control setting, to an international telephone service provider corresponding to the identification code; Service method. The method of claim 5 or 6, wherein step (a) (a-1) the mobile terminal attempting to register a location to an exchange; (a-2) the exchange identifying the International Roaming MIN (IRM) of the mobile terminal, determining that it is a roaming subscriber, and transmitting a registration request message to a signaling service provider server; (a-3) The signal relaying operator server analyzes the IRM in the registration request message to determine the subscriber's home operator and the location registration server signal point, and then sends the registration request message to the subscriber's home operator's location registration server. Transmitting; (a-4) if the location registration server determines that it is a normal subscriber capable of international roaming by comparing its profile with the registration request message, and transmitting a response message to the signal relaying provider server to the registration request message; And (a-5) The method of the plus code dialing service using a feature code, comprising the step of transmitting the response message to the exchange by the signaling service provider server. A plus code dialing service method using a feature code based on a CDMA network, (a) the mobile terminal receiving the feature code, the country code and the recipient's telephone number and attempting to make a call; (b) transmitting, by a switch wirelessly connected to the mobile terminal, the feature code to a signaling service provider server; (c) transmitting, by the signal relaying provider server, the international telephone operator identification code of the country where the mobile terminal roams to the exchange based on the feature code; And and (d) the exchange setting up an international call based on the international call operator identification code. The method of claim 9, wherein step (c) The method of claim 1, wherein the feature code is a feature code for making an international call, and the identification code of the country where the mobile terminal roams is transmitted to the exchange.

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