KR20050075469A - International roaming home dialing service method - Google Patents

Abstract

The present invention transmits an origination request to a home location register for all calls originated during international roaming using the origination trigger function, translates the local number system of the corresponding area from the home location register, and sends it back to the originating exchange. An international roaming home dialing service method for connecting a call by

An international roaming home dialing service method according to the present invention includes a first step of receiving a call connection request for a terminal registered in an international roaming service; A second step of transmitting an origination request signal to a home location register using an origination trigger function; A third step of receiving an incoming number with an identification number and a country code of a mobile communication network according to a translated number system from the home location register; And a fourth step of performing a call connection with a called number assigned with an identification number and a country code of the mobile communication network.

Description

International Roaming Home Dialing Service Method

The present invention relates to a method for international roaming home dialing service, and more particularly, to request an origination request for all calls made during international roaming using an origination trigger function. The present invention relates to an international roaming home dialing service method which transmits to a home location register (HLR), translates a number system of a corresponding area from a home location register (HLR), and transmits the same to a calling exchange.

The mobile telephone networks currently used in various countries around the world apply different wireless and wired network interface standards by region or country. Moreover, existing analog mobile telephone service technologies and code division multiple access / time division multiple access (CDMA / TDMA) are used. With the coexistence of digital mobile phone services, the application of mutual roaming service among countries is becoming a very difficult problem.

Currently, North American Protocol Standard (IS41) and European Protocol Standard (GSM MAP) have been established as protocol standards for interworking heterogeneous networks, but these protocol standards are based on the premise of using the same wireless access interface. Can be enabled.

For example, when a roaming service occurs between countries, if a subscriber who registers for CDMA mobile phone service in Korea travels to Japan, the subscriber must use the terminal used in Korea and receive his / her own You must be able to receive incoming services with a number. In order to provide such a service, location information of a subscriber located in Japan must be stored in an HLR (Home Location Register) in Korea, and interworking with a Japanese side VLR (Visitor Locaion Register) may be required to process an incoming call. Such interworking MAP (Mobile Application Part) interworking function may be possible by performing a protocol conversion function by mutual agreement according to the above-mentioned standard protocol.

However, the CDMA air interface standard of Korea and the Japan air interface standard (PDC) of Japan are basically different from each other, and thus wireless connection cannot be established, and the MAP protocol interworking between networks loses its meaning.

It is the use of dual mode terminals that has been discussed to overcome these differences in air interface. However, dual mode terminals have many disadvantages compared to single mode terminals in price and size, and recommending subscribers to purchase dual mode terminals for intermittent international roaming is hardly persuasive in terms of market formation. Moreover, when roaming to a third station is required, a triple mode terminal is required, and further, a multi mode terminal is required.

Another way to overcome the differences in the air interface is to use a SIM card or a smart card. This method inserts a card containing subscriber's mobile phone number (MIN) and device number (ESM) into the terminal and uses it as if it is its own terminal.

However, in order to provide international roaming services in this way, the terminal currently in use must be replaced with a card-removable terminal. The production potential and time of mass production of these terminals are unpredictable. Therefore, in order to provide international roaming service, another technical solution should be devised.

In addition, the method proposed up to now in terms of the network protocol is to place a protocol conversion device between the two networks to be interworked to perform the MAP protocol and the lower level signaling protocol connection function between the two networks.

When implementing the international roaming service using only this method, the MSC and HLR functions of the existing mobile telephone network should be supplemented and developed. It is necessary to rely on foreign companies for development, which usually requires a lot of development costs and time.

In order to solve the above problems, the present invention transmits an origination request to a home location register for all calls originated during international roaming by using an origination trigger function, thereby providing a local numbering system in the home location register. An object of the present invention is to provide an international roaming home dialing service method for translating and transmitting a call back to an originating exchange.

In order to achieve the above object, the present invention is an international roaming home dialing service method for connecting a call by translating a number system for all calls originating during international roaming, and making a call connection request for a terminal registered in an international roaming service. A first step of receiving; A second step of transmitting an origination request signal to a home location register using an origination trigger function; A third step of receiving an incoming number with an identification number and a country code of a mobile communication network according to a translated number system from the home location register; And a fourth step of performing a call connection with a called number assigned with an identification number and a country code of the mobile communication network.

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

First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings.

In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of hardware to which the international roaming home dialing service method according to an embodiment of the present invention is applied.

Hardware to which the present invention is applied include the ILR 40, the database 41, the controllers 42 and 48, the maintenance units 43 and 52, the signal processing connection unit 44, the operator connection unit 45 and 46, and the call path A part 47, a relay line connecting part 49, a subscriber connecting part 50, and a signal device part 51 are included.

The Interworking Location Register (ILR) 40 stores roaming subscriber information and is identical to the hardware structure of the HLR used in the mobile telephone network. That is, it has a structure in which the signal processing connecting portion 44 is added to the general computer structure.

The database 41 stores location information and service information of subscribers who have registered roaming services, and the controller 42 is in charge of various control functions required for call processing, maintenance, and the like.

The maintenance unit 43 manages and analyzes operation information such as failure detection and recovery, prevention, and measurement statistical information for various devices. The signal processing connector 44 is a signal protocol processing function such as a common line (No. 7) signal processing function for exchanging and receiving signal information necessary for communication with other network components such as an exchange and a physical layer connection function required for signaling. Do this. The operator connection unit 45 performs a connection function for various input / output devices such as an operator terminal required for system operation.

Interworking Switching (ISW) 53 is located in the manganese where roaming service is to be performed and performs call routing and signal conversion functions.It can be configured as an MSC or a general switch, and only the functional blocks for processing a general switch function are shown in the drawing. do.

The operator connection unit 46 performs a connection function for various input / output devices such as an operator terminal required for system operation. The call path unit 47 is composed of a time switch, a space division switch, and the like to perform the actual call path setting, and the controller 48 performs an overall control function related to call processing and operation maintenance.

The relay line connection unit 49 provides a call path and a signal path with another system, and the subscriber line unit 50 may be connected to a general wired subscriber or a base station controller or a base station to perform a subscriber registration function.

The signal device 51 performs a signal processing function necessary for MAP protocol and call processing. The maintenance unit 52 performs a status management function for various devices and software in the system, and an operation maintenance function such as monitoring, detecting, isolating, and charging and measuring statistics of faults.

2 is a block diagram of a mobile communication network to which the present invention is applied.

The ILR 40 and the ISW 53 are located between the network 1 of the country 1 and the network 2 of the country 2 performing the mobile telephone service in order to carry out the present invention. The MSC 1 of the network 1 and the MSC 2 of the network 2 are connected to the ISW and the ILR and the relay line for establishing the signal link and the call path for MAP message communication, respectively.

In the mobile communication network, the terminal mobility is basically provided, so the subscriber who used MS 2 in the network 2 of the country 2 moves to the network 1 of the country 1, and the MS 2 also uses the MS 2 in the country 1 network. A call originated from the network can be received.

Service subscriber 1 was using MS 2 with his number in network 2 in country 2, and network 2 in country 2 and any acquaintances in the world who wanted to make a call with service subscriber 1 The number of MS 2 given to the user is dialed and a call is attempted.

At this time, the service subscriber 1 moved from the network 2 of the country 2 to the network 1 of the country 1 while carrying the MS 2, and the radio access standards and number plans of the network 1 and the network 2 of the country 1 were different. The origin trigger function allows the use of MS 2 in country 1 network 1.

In the present invention, even if the service subscriber 1 registered in the network 2 of the country 2 is located in the network 1 of the other country 1, it is possible to receive an incoming call as if the call is received from the network 2 of the country 2 with respect to the call made to the second country. do.

3 is a flowchart illustrating an international roaming home dialing service method according to an exemplary embodiment of the present invention.

Service subscriber 1, which is served in network 2 of country 2, is moved to network 1 area of country 1 with MS 2 carried.

Service subscriber 1, which moved from network 2 of country 2 to network 1 of country 1, is subscribed to international roaming service through MS 2. Accordingly, subscription information of the international roaming service of MS 2 is stored in the ILR 40.

When a service subscriber 1 subscribed to the international roaming service requests a telephone call to the network 2 of the country 2 using MS 2, for example, MS 2 registered in the international roaming service is "051-811" in the United States of America. If you want to make a call with -1234 ", the service subscriber 1 of the MS 2 requests a call connection by inputting the telephone number" 051-811-1234 "of the called party (S302).

The originating call sent from MS 2 is received by MSC 1, and the MSC 1 receiving the originating call from MS 2 is sent to the origination request (HLR1) by the Origination Trigger function. ) A signal is sent (S304).

The home location register (HLR1) receives the origination request signal from the MSC 1 and verifies the international roaming service with the ILR 40 to translate the number system (S306).

Subsequently, the home location register HLR1 responds with MSC 1 by prefixing the called number with the identification number 011 and the country code 82 of the mobile communication network (S308).

MSC 1 transmits the number " 011-82-051-811-1234 " with the identification number (011) and the country code (82) to the ISW 53 (S310), and the ISW 53 sends the MSC. The call signal is transmitted to the called terminal through 2 so that a call path is established between the called terminal and MS 2 of the service subscriber 1 (S312).

As described above, according to the embodiment of the present invention, the origination request is transmitted to the home location register (HLR) for all calls made during international roaming using the origination trigger function. It is possible to realize an international roaming home dialing service method which translates the local number system of the corresponding area in HLR and transmits it to the originating exchange to connect the call.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics 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.

As described above, according to the present invention, it is possible to service by simply translating the numbering system without having to change hardware or software for the network components of the existing mobile telephone network to implement the international roaming service. As a result, it is possible to reduce the burden on the enormous development costs anticipated in the process of making changes to the operating system, save time, and prevent deterioration of service quality.

1 is a block diagram of hardware to which the international roaming home dialing service method according to an embodiment of the present invention is applied;

2 is a configuration diagram of a mobile communication network to which the present invention is applied;

3 is a flowchart illustrating an international roaming home dialing service method according to an exemplary embodiment of the present invention.

※ Explanation of codes for main parts of drawing

40: ILR 41: database

42, 48: control unit 43, 52: maintenance unit

44: signal processing connection 45, 46: operator connection

47: call path 49: relay line connection

50: subscriber connection unit 51: signal device unit

Claims (5)

An international roaming home dialing service method for translating a number system and connecting calls to all calls originating during international roaming. A first step of receiving a call connection request for a terminal registered in an international roaming service; A second step of transmitting an origination request signal to a home location register (HLR) using an origination trigger function; A third step of receiving a called number with an identification number and a country code of a mobile communication network according to a translated number system from the home location register (HLR); And And a fourth step of performing a call connection with a called number assigned with an identification number and a country code of the mobile communication network. The method of claim 1, And wherein the call connection request includes a called number for a terminal in the first step. The method of claim 1, In the second step and the third step, the home location register (HLR) translates the number system of the corresponding area, and adds the identification number and country code of the mobile communication network to the called number. Service method. The method of claim 1, The international roaming service is registered by MSC (Moblile Switching Center) which receives a roaming service code, its own number and password from a service subscriber who has moved to another network, and is released as Interworking Switching (ISW). Only the data work is performed so that the code can be set, and the ISW analyzes the incoming number and requests and receives the calling number from the calling station when the roaming service code is confirmed, and the ISW receiving the calling number registers the roaming service. Requesting activation of an international roaming service to an interworking location register (IRL) in which subscriber information is stored, and verifying the validity of a subscriber who attempts to activate a service by using the subscriber's own number and password received from the ISW; Upon verification of the validity of the subscriber, the ILR will be able to The mobile location register (HLR) before the mobile unconditionally transfers a call transfer service registration request to the subscriber using a MAP message, and the home location register (HLR) before the mobile terminal receiving the service registration request unconditionally calls to the subscriber. After activating the switching service and recording the called terminal number after the transfer to the forwarding destination number, the service registration response message is transmitted to the ILR, and the ILR receiving the service registration response message transmits a roaming service registration response message to the ISW. And registering with the ISW receiving the roaming service registration response message by transmitting a confirmation tone indicating that the service registration is completed. The method of claim 1, The international roaming service is registered by MSC (Moblile Switching Center) which receives a roaming service code, its own number and password from a service subscriber who has moved to another network, and is released as Interworking Switching (ISW). Only data work is performed to set the sign, and the ISW analyzes the incoming number, and when the roaming service code is confirmed, it requests and receives the calling number from the calling station, When the ISW receiving the calling number requests activation of an international roaming service to an Interworking Location Register (IRL) that stores information on a subscriber who has registered roaming service, the ILR uses the subscriber's own number and password received from the ISW. After verifying the validity of the subscriber to the service activation attempts to notify the result to the ISW, After the verification of the validity of the subscriber is completed, the ISW unconditionally transfers a call transfer service registration request to the home location register of the service requesting subscriber using a MAP message and receives the service registration request. The Location Register (HLR) unconditionally activates the call transfer service for the subscriber, transmits the service registration response message to the ISW after receiving the terminal called number after the transfer to the call forwarding number, and receives the roaming service registration response message. International roaming home dialing service method, characterized in that the ISW transmits a confirmation tone indicating that the service registration is completed to the calling party.