KR20080083549A - Mobile phone roaming system using internet phone and the service method for the same - Google Patents

Mobile phone roaming system using internet phone and the service method for the same Download PDF

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Publication number
KR20080083549A
KR20080083549A KR1020070031525A KR20070031525A KR20080083549A KR 20080083549 A KR20080083549 A KR 20080083549A KR 1020070031525 A KR1020070031525 A KR 1020070031525A KR 20070031525 A KR20070031525 A KR 20070031525A KR 20080083549 A KR20080083549 A KR 20080083549A
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South Korea
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telephone
phone
call
internet
incoming
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KR1020070031525A
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Korean (ko)
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이승욱
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이승욱
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Publication of KR20080083549A publication Critical patent/KR20080083549A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to mobile phone roaming, and in particular, by registering to the call forwarding additional service provided by the telecommunications company and by setting up a separate incoming telephone number for the incoming telephone number registered in the Internet telephone user ID in the Internet phone server using the Internet phone It relates to a mobile communication roaming system that can bring the effect of roaming mobile phones. According to the present invention, according to the present invention can provide the same function as the mobile phone roaming using the Internet phone without using the existing mobile phone roaming service when the overseas phone call, through which can dramatically lower the mobile phone roaming cost It works.

Description

Mobile phone roaming system using internet phone and the service method for the same}

1 is an overall block diagram of a mobile communication roaming system using an Internet phone according to a preferred embodiment of the present invention;

2 is a flowchart illustrating an operation process of a mobile communication roaming service method using an Internet phone according to a preferred embodiment of the present invention;

FIG. 3 is a flowchart illustrating an example of registering an incoming call number and an incoming call number for a phone number registered in an Internet phone server in FIG.

Figure 4 is a flow chart illustrating in detail an example of a call connection to the roaming access number registered in the call forward to the incoming call number in Figure 2;

FIG. 5 is a flowchart illustrating an example of connecting a call to an incoming call number set for a phone number registered to a user ID of the Internet phone server in FIG. 2.

The present invention relates to mobile phone roaming, and in particular, by registering to the call forwarding additional service provided by the telecommunications company and by setting up a separate incoming telephone number for the incoming telephone number registered in the Internet telephone user ID in the Internet phone server using the Internet phone It relates to a mobile communication roaming system that can bring the effect of roaming mobile phones.

In general, an Internet phone is also called an Internet telephone or a Voice over Internet Protocol (VoIP) phone, and refers to a system or service that is used like a normal telephone by transmitting and receiving voice over the Internet.

Roaming service is a service that extends the quality and scope of services by cooperating with telecommunications companies. Overseas roaming is a domestic mobile telecommunications company that provides mobile phone services in partnership with overseas telecommunications companies. You will also be charged. However, for SMS text service, the reception is free.

Roaming is basically divided into automatic roaming, which takes its own cell phone, and rental roaming, which rents a cell phone at an airport roaming center. In case of automatic roaming, you can use the phone you are familiar with abroad, but few countries are available. Therefore, most of the rental roaming, there is a way that you can use your phone number as it is in the roaming lease.

Most people use roaming when they need to use a mobile phone abroad. However, there is a problem that the burden is high because the overseas roaming cost is very expensive.

In general, roaming charges are classified into three categories: when calling from the same country from abroad, when calling from Korea, and when receiving a call. Of course, the cost is the highest when calling from abroad. And it is relatively inexpensive when making a local call.

Roaming charges vary slightly from region to region. In particular, in Europe, call charges from overseas to Korea are very expensive, but they are inexpensive when received. In addition, there are price differences between mobile operators in the same country. L carriers, for example, are cheaper than other carriers in China and Hong Kong, but more expensive in Thailand.

Roaming charges are usually announced with the lowest and highest prices. In Korea, the rate is applied differently depending on the time in foreign countries as telephone charges are discounted at night.

For roaming in foreign countries, the rate is specified in 1 minute increments. In Korea, the tariff is calculated every 10 seconds, while roaming is calculated in minutes. Therefore, even if you use only 1 second, you have to pay a 1-minute fee, there was a problem that the 1-minute fee is set even if you use the phone 10 seconds after receiving the wrong call.

In addition, when the caller ID service is not available overseas, such as rental roaming, there is a problem in that a fee that is not required to be paid after receiving an incoming call blindly occurs.

An object of the present invention is to provide a mobile communication roaming system that can replace the overseas roaming service with a high cost by implementing a service having the same effect as a mobile phone roaming service using an Internet phone.

In the mobile communication roaming system using the Internet phone of the present invention, if the incoming telephone number is registered in the call forwarding service, the mobile telephone roaming system connects the incoming telephone number to the roaming access number registered as the incoming telephone number, and connects to the Internet telephone and the general public through the Internet. Telephone network for making phone calls; And converts the voice signal transmitted through the telephone network into a packet signal and makes a telephone call with an Internet telephone having a telephone number registered in the user ID.If the incoming telephone number is set for the telephone number registered in the user ID, the telephone number is dialed. It is configured to include an Internet phone server that connects the call to the incoming telephone number for the incoming call request.

In the mobile communication roaming system using the Internet phone of the present invention, the telephone network receives the call request signal from the calling telephone, checks the additional service setting of the incoming telephone number, and calls the roaming access number when the call forwarding is registered to the roaming access number. A first telephone network to connect; And a second telephone network configured to receive a call request signal having an incoming phone number as a destination from an Internet phone server, and to make a call to the called phone number.

In the mobile communication roaming system using the Internet phone of the present invention, the Internet phone server receives and registers a telephone number for a user ID by external input through the Internet, and stores and receives an incoming telephone number for the telephone number. It is done.

A mobile communication roaming service method using an Internet phone according to the present invention includes a first step of registering an incoming phone number and an incoming phone number for a phone number registered in an Internet phone server, respectively; A second step of connecting a call to a roaming access number set as an incoming call number for the incoming call number when a call request for the incoming call number occurs; And analyzing the information on the incoming phone number on the incoming call to the roaming access number to check whether the incoming phone number is registered on the Internet phone server, and if the check result is registered, the Internet phone user corresponding to the incoming phone number is set. And a third step of making a call to the called telephone number.

In the mobile communication roaming service method using the Internet phone of the present invention, the first step includes: an eleventh step of registering a call forward with a roaming access number with respect to a received phone number of a receiving telephone; A twelfth step of registering a telephone number with respect to the ID of the Internet telephone user; And a thirteenth step of registering an incoming telephone number to replace the incoming telephone number with respect to the ID of the Internet telephone user.

In a mobile communication roaming service method using an Internet phone of the present invention, the second step includes: a twenty-first step of requesting a call by a calling telephone to a receiving telephone number through a telephone network; A twenty-second step of checking an additional service setting for an incoming telephone number of an outgoing telephone in a telephone network; And a twenty-third step of forwarding the call to the roaming access number if it is registered as the roaming access number as a result of the additional service setting check.

The third step in the mobile communication roaming service method using the Internet phone of the present invention, the Internet phone server analyzes and extracts the information on the received phone number from the call received by the roaming access number, the received phone number is sent to the Internet phone server A thirty-first step of checking whether it is registered; And a thirty-second step of requesting a call to the called telephone number registered by the Internet phone server for the received telephone number if the reception telephone number is registered as a result of the check in the thirty-first stage.

The third step in the mobile communication roaming service method using the Internet phone of the present invention is characterized in that the telephone network further comprises a thirty-third step of requesting a call to the incoming call setup telephone having the called phone number.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall block diagram of a mobile communication roaming system using an Internet phone according to a preferred embodiment of the present invention.

As shown, the mobile communication roaming system using the Internet phone is largely composed of the outgoing telephone 20, the incoming call setting telephone 30, the Internet phone server 40, the Internet 50, the telephone network 60. It may also include a PC 70 in which the receiving telephone 10 and the Internet telephone are installed.

The receiving telephone 10 is a telephone of a user who wants to be provided with a mobile communication roaming service using an internet phone, and generally means a portable telephone that can be taken abroad while maintaining a telephone number. In the present invention, the call is made through the incoming call setting telephone 30 instead of the receiving telephone 10.

The outgoing telephone 20 is a telephone requesting a call to the receiving telephone 10, and may be a general landline telephone and a mobile telephone. In a general situation, when the calling telephone 20 sends a call signal to the receiving telephone 10, the telephone network 60 receives a signal and sends a call request signal to the receiving telephone 10 to the calling telephone 20 and the receiving telephone 10. A call connection is made between them.

The incoming call setting phone 30 is a phone located in an area where a user of the receiving phone 10 is to be provided with the mobile communication roaming service according to the present invention. That is, the user can receive a call to the receiving telephone 10 through the incoming call setting telephone 30 without having to take the receiving telephone 10 abroad. In this case, the incoming call setting phone 30 may correspond to a landline phone, a mobile communication phone and an internet phone.

The Internet phone server 40 is a device that is connected to the telephone network 60 and the Internet 70 at the same time, and provides a telephone service that can be connected to a general telephone through a PC 70 connected to the Internet. When the call request signal is received through the telephone network 60, the call is connected to the PC 70 and the Internet phone having the Internet phone number corresponding to the received telephone number. On the contrary, when the call request signal is received from the Internet phone and the PC 70, The packet signal is converted into a voice signal and transmitted to the telephone network 60.

In addition, the Internet phone server 40 may set a separate incoming telephone number for the telephone number registered in the user ID. This allows the user to access the Internet phone server 40 through the Internet and receive a call using another incoming phone number instead of the phone number registered in the user ID, and the incoming phone number set by the user is stored in a separate database. Stored.

In this case, the incoming telephone number may be a telephone number transmitted or received through the Internet or a general telephone number connected to the telephone network. If the incoming phone number registered in the user ID is a general phone number, it is not a phone number of the PC 70 connected to the Internet, so that a call request signal is sent to the telephone network 60 to attempt to connect to the incoming phone number.

In addition, the Internet phone server 40 analyzes and extracts the received phone number from the roaming access number for the call received from the specific roaming access number, and the received phone number is the telephone number of the user ID registered in the Internet phone server 40. After checking the acknowledgment, a call connection is attempted to the called telephone number set for the corresponding incoming telephone number.

The telephone network 60 includes both a wired telephone network and a wireless telephone network. The telephone network 60 may be interworked with the Internet through the Internet phone server 40 to make a telephone connection between an Internet telephone and a general telephone. In addition, upon receiving a call request from the calling telephone 20, it is checked whether the corresponding incoming telephone number is registered in the call forwarding service. If the check result is registered in the call forwarding service, the call is attempted to connect to the roaming access number registered as the called phone number for the incoming call number.

The telephone network 60 can be largely divided into a first telephone network 61 and a second telephone network 62, the first telephone network 61 generally means a domestic telephone network, and the second telephone network 62 is a first telephone network ( 61) means an overseas telephone network that is connected through an overseas roaming service.

The first telephone network 61 checks the additional service setting of the received telephone number requested by the calling telephone 20. If the incoming call number is registered in the call forwarding service, the call connection is attempted to the incoming call number registered in advance for the incoming call number.

If the incoming phone number for the incoming phone number is a phone number connected to the first telephone network 61, a call is made between the outgoing phone 20 and the phone having the incoming phone number by directly connecting to the incoming phone number without any further processing. Connected.

However, if the called phone number is not a phone number connected to the first telephone network 61 but a specific roaming access number having an identifier indicating an Internet phone number, the call request signal is transmitted to the Internet phone server 40. That is, if all users are forwarded to a common roaming access number (for example, '070-1234-1234'), the signal sent to the incoming telephone number of all users is transmitted to the Internet phone server 40.

The second telephone network 62 generally refers to a wired or mobile telephone network of an overseas country. When the second telephone network 62 receives a call request signal having an incoming telephone number as a call destination from the Internet phone server 40, the incoming telephone set has the incoming telephone number. If the incoming call establishment phone 30 receives a call and attempts to make a call to 30, the call connection is established between the Internet phone server 40 and the incoming call establishment phone 30. However, in practice, since the Internet phone server 40 is connected to the call with the calling phone 20, the call is effected between the calling phone 20 and the incoming call setting phone 30 on the outside.

The PC 70 in which the Internet phone is installed is a device to which a phone number is assigned so that a call can be made through the Internet. In the present invention, if a separate incoming telephone number is set in addition to the telephone number with respect to the user ID of the Internet telephone in the Internet phone server 40, an attempt is made to connect directly to the incoming telephone number instead of making a telephone call through the Internet telephone.

2 is a flowchart illustrating an operation process of a mobile communication roaming service method using an Internet phone according to a preferred embodiment of the present invention.

As shown in the figure, first, the incoming telephone number and the incoming telephone number for the telephone number registered in the Internet phone server are respectively registered (S1). That is, instead of applying for an overseas roaming service, a mobile phone user applies a call forwarding service to a telecommunications company to request to receive a call to an incoming phone number with respect to the telephone number of the receiving telephone 10, and a specific roaming access number as the corresponding incoming phone number. Register the user ID and request to switch to the incoming call setup phone 30 by setting up a separate incoming call number for the user ID, the incoming call number, and the incoming call number by accessing the Internet phone server 40.

At this time, the incoming phone number registered in the user ID of the Internet phone server 40 must be set to the telephone number of a general telephone located abroad where the user is to move, so that the user of the receiving telephone 10 is transferred to the receiving telephone 10 from the corresponding area. You can answer an incoming call.

Next, when a call request for the telephone number of the receiving telephone 10 occurs, the telephone network 60 connects the call to the roaming access number set as the called telephone number with respect to the telephone number of the receiving telephone 10 (S2). .

Finally, the Internet phone server 40 analyzes and extracts the incoming phone number for the call coming into the roaming access number from the telephone network 60 to check whether the received phone number is registered in the Internet phone server 40, If the check result is that the receiving telephone number is registered, check the incoming telephone number registered separately for the user ID having the corresponding telephone number as the telephone number, and connect the call to the incoming telephone number (regular phone number) (S3).

FIG. 3 is a flowchart illustrating an example of registering an incoming call number and an incoming call number for a phone number registered in an Internet phone server in FIG. 2.

As shown, first, the incoming call number of the receiving telephone 10 is registered as a call forwarding roaming access number (S11). This can be done by using the call forwarding service provided by the user of the receiving telephone 10 as a supplementary service at the carrier.

Then, the user of the receiving telephone 10 accesses the Internet phone server 40 via the Internet, and registers a telephone number with respect to the Internet telephone user ID (S12). At this time, the user registers his or her received phone number so that the Internet phone server 40 can retrieve the incoming phone number by analyzing the incoming call to the roaming access number.

That is, each user can register the incoming telephone number and the incoming telephone number according to the user ID in the Internet phone server even if the user does not have an authorized Internet telephone number (for example, 070 number).

Then, the user separately registers the incoming telephone number to replace the incoming telephone number registered for the Internet telephone user ID (S13). This is done by storing the incoming telephone number in advance in the database of the Internet phone server 40 as a service provided by the Internet phone server 40, not a service provided by the communication company.

That is, when the user accesses the Internet phone server 40 and logs in with the Internet phone user ID and inputs an incoming phone number to receive a call instead of the previously registered phone number, the Internet phone server 40 stores it in a database.

FIG. 4 is a flowchart illustrating an example of connecting a call received to a receiving phone number to a roaming access number registered as a call forwarding call in detail.

As shown, first, the calling telephone 20 requests a call to the telephone number of the receiving telephone 10 through the telephone network 60 (S21).

Then, the telephone network 60 checks the additional service setting for the incoming telephone number of the outgoing telephone 20 (S22). At this time, the additional service setting items are recorded in a device such as an HLR (Home Location Register) in the telephone network 60. That is, in the case of wireless mobile communication, the call request signal of the calling telephone 20 is transmitted to the exchange via the base station, and the exchange determines how to set up the additional service of the HLR and the location of the receiving telephone 10 to connect the call. Decide if

If the call forwarding registration is registered as a result of the additional service setting check, the roaming access number is checked and the call forwarding is switched to the roaming access number (S23). That is, as a result of referring to the HLR, if the call forwarding is registered, since the phone number registered by the user in the first step S1 is recorded in the device such as the HLR, the phone number of the receiving telephone 10 is recorded. Read and determine the phone number to connect to and request a call.

In addition, it may be determined whether the roaming access number registered in the call forwarding system, such as the HLR, is a number having a predetermined type of form that is pre-assigned as a telephone number provided through the Internet between the telephone network 60 and the Internet phone server 40. That is, if the roaming access number is an Internet phone number (for example, a phone number starting with '070'), the phone number provided through the Internet between the telephone network 60 and the Internet phone server 40 is previously known. Since it is promised, the telephone network 60 may be configured to pass the call request signal received from the outgoing telephone 20 to the Internet phone server 40.

And, if all users are forwarded to a common roaming access number (for example, '070-1234-1234'), the signal sent to the incoming telephone number of all users is transmitted to the Internet phone server 40. That is, everyone will use the same roaming access number.

FIG. 5 is a flowchart illustrating an example of connecting a call to an incoming call number set for a phone number registered to a user ID of the Internet phone server in FIG. 2.

As shown, the Internet phone server 40 analyzes and extracts information on the received phone number from the call previously received with the roaming access number, and determines whether the corresponding phone number is registered in the Internet phone server 40. Check (S31).

If the reception telephone number is registered in the Internet phone server 40 as a result of the check, a call request is made to the registered destination telephone number for the corresponding reception telephone number (S32). That is, the Internet phone server 40 requests a call to the called telephone number set separately for the telephone number registered to the Internet telephone user ID in the thirteenth step S13.

In addition, if the incoming telephone number is not an Internet telephone number connected on the Internet, the Internet phone server 40 requests a call to the incoming telephone number through the general telephone network 60 (S32). That is, the Internet phone server 40 transmits the call signal of the outgoing telephone 10 previously received through the telephone network 60 to the telephone network 60 again.

On the other hand, the Internet phone server 40 may process this process by generating a new call signal separately from the call signal of the calling phone 20. For example, the Internet phone server 40 generates a call signal so that the telephone number of the first outgoing telephone 20 is recognized instead of the telephone number registered in the Internet telephone user ID, and then requests a call to the called telephone number through the telephone network 60. In addition, it may be configured to serve as a link for connecting each call signal internally digitized in the state of being connected to each of the calling phone 20 and the incoming call setting phone 30 (see FIG. 1).

Finally, the telephone network 60 requests a call to the incoming call setup phone 30 having the incoming call number to establish a call (S33). That is, the telephone network 60 receives the call request signal from the Internet phone server 40, retrieves the location of the incoming call setup phone 30 having the incoming call number, and sends a call request signal to the incoming call setup phone 30, and sets up the incoming call. When the phone 30 receives a call, a call is made between the calling phone 20 and the incoming call setting phone 30.

As an example, the above call is connected to the service through the following process.

(1) A customer who uses a mobile phone, A (011-1234-1234), applies for a call forwarding supplementary service (usually a monthly fee of around 700 ~ 900 won).

(2) A call forwarding is set from A mobile phone to CDPhone service (or Internet phone service, VoIP service) access number B (070-1234-1234).

(3) When C (016-1234-1234) calls A, he is automatically forwarded to B.

(4) For a call forwarded from a CDPhone server (or an Internet phone server, a VoIP server),

    (4) -1. The sender number (C) and the recipient number (A) are analyzed and extracted.

    (4) -2. A person's setting is checked and the call is forwarded to an Internet phone with a call D (for example, 852-1234-1234 in the case of HK (Hong Kong)).

    (4) -3. Caller D gets a caller's caller ID and the call is established.

When comparing the present invention and the existing overseas roaming service in terms of cost as follows.

In case of S communication company, the mobile phone used to roam automatically, and when receiving a mobile phone roamed in HK, the reception comes out about 880 won per minute.

However, in the present invention, when roaming using a CDPhone (or an Internet phone or VoIP service), a charge (1 minute = 90 won) from the A mobile phone to the CDPhone server B + the CDK to the HK phone D (1 minute = 40 won) = 130 won will come out.

That is, about 85% of the cost is saved.

Although the present invention has been described in more detail with reference to examples, the present invention is not necessarily limited to these examples, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

According to the present invention, when using an overseas phone call, it is possible to provide the same function as a mobile phone roaming using an internet phone without using an existing mobile phone overseas roaming service, thereby effectively reducing the mobile phone roaming cost.

Claims (8)

A telephone network for making a call connection to a roaming access number registered as a called telephone number with respect to the received telephone number if the received telephone number is registered in the call forwarding service, and for making a telephone connection between an Internet telephone and a general telephone through the Internet; And Converts the voice signal transmitted through the telephone network into a packet signal and makes a telephone connection with an Internet telephone having a telephone number registered in the user ID.If the incoming telephone number is set for the telephone number registered in the user ID, the telephone number is An internet phone server for making a call to the called phone number for an incoming call request; Mobile communication roaming system using an Internet phone comprising a. The method of claim 1, The telephone network, A first telephone network which receives a call request signal from an outgoing telephone, checks an additional service setting of an incoming telephone number, and transfers a call to the roaming access number when the call forwarding is registered to a roaming access number; And A second telephone network which receives a call request signal having an incoming phone number as a destination from the Internet phone server and connects the call to the incoming phone number; Mobile communication roaming system using an Internet phone, characterized in that comprises a. The method according to claim 1 or 2, The Internet phone server, Mobile phone roaming system using an Internet phone, characterized in that by receiving the phone number for the user ID by the external input via the Internet and register, and receiving and storing the incoming phone number for the phone number. A first step of registering an incoming telephone number and an incoming telephone number for the telephone number registered in the Internet phone server, respectively; A second step of, when a call request for the received telephone number is generated, a call connection to a roaming access number set as a called telephone number for the received telephone number; Analyzing the information on the received telephone number on the incoming call to the roaming access number to check whether the received telephone number is registered in the Internet phone server, and if the check result is registered, the Internet corresponding to the received telephone number A third step of making a call to a set called phone number of the phone user; Mobile communication roaming service method using an Internet phone comprising a. The method of claim 4, wherein The first step is, An eleventh step of registering a call forward to a roaming access number with respect to a reception telephone number of a reception telephone; A twelfth step of registering a telephone number with respect to the ID of the Internet telephone user; And A thirteenth step of registering an incoming telephone number to replace the incoming telephone number with respect to the ID of the Internet telephone user; Mobile communication roaming service method using an Internet phone comprising a. The method of claim 5, wherein The second step, A twenty-first step of a calling telephone making a call to the called telephone number through a telephone network; A twenty-second step of checking an additional service setting for an incoming telephone number of the calling telephone in a telephone network; And A twenty-third step of forwarding the call to the roaming access number if it is registered as a roaming access number as a result of the additional service setting check; Mobile communication roaming service method using an Internet phone comprising a. The method according to any one of claims 4 to 6, The third step, A thirty-first step of analyzing, extracting, by the Internet phone server from the call received with the roaming access number, information on the received phone number, and checking whether the received phone number is registered in the Internet phone server; And A thirty-second step of requesting, by the Internet phone server, a call to the called telephone number registered for the received telephone number if the received telephone number is registered as a result of the check in the thirty-first step; Mobile communication roaming service method using an Internet phone comprising a. The method of claim 7, wherein And a thirty-third step of the telephone network requesting a call to a called telephone set having the called telephone number and setting up a call.
KR1020070031525A 2007-03-12 2007-03-30 Mobile phone roaming system using internet phone and the service method for the same KR20080083549A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140376544A1 (en) * 2011-09-29 2014-12-25 Zte Corporation Method and system for converging call
KR101574959B1 (en) 2014-12-29 2015-12-24 (주)오픈벡스 Roaming method and computer readable storage medium using call forwarding service
KR20180014654A (en) * 2016-08-01 2018-02-09 이진희 International roaming service system using internet and method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140376544A1 (en) * 2011-09-29 2014-12-25 Zte Corporation Method and system for converging call
US9313818B2 (en) * 2011-09-29 2016-04-12 Zte Corporation Method and system for converging call
KR101574959B1 (en) 2014-12-29 2015-12-24 (주)오픈벡스 Roaming method and computer readable storage medium using call forwarding service
KR20180014654A (en) * 2016-08-01 2018-02-09 이진희 International roaming service system using internet and method thereof
KR20180014653A (en) * 2016-08-01 2018-02-09 이진희 International roaming service system using internet and method thereof

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