KR20000045588A - Other network subscriber roaming and call processing method in mobile communication network - Google Patents

Abstract

PURPOSE: An other network subscriber roaming and call processing method in the mobile communication network is provided to perform the same mobile communication service as the internal network using the existing PSTN for the roaming and elemental call processing of a subscriber of other network. CONSTITUTION: If a location registration request from a subscriber mobile station(34) of an other network service company is inputted, a MSC/VLR(Mobile Switching Center/Visitor Location Register)(21) of an internal network(20) recognizes the mobile station(34) and transmits the location registration instruction to a gateway(23) of the internal network(20)(ST1-ST3). The gateway(23) converts the instruction by a protocol conversion and transmits the converted instruction to a gateway(33) of the other network(30)(ST4-ST5). The gateway(33) carries out routing to a HLR(32), recognizes the registration of an other network mobile station(34) and transmits the recognition result to the gateway(23)(ST6-ST9). The gateway(23) transmits the recognition result to the MSC/VLR(21), and the MSC/VLR(21) stores the data of the other network mobile station(34) in the data base and responds to the location renewal of the mobile station(34)(ST10-ST12).

Description

Roaming and call processing method of other subscribers in mobile communication network

The present invention relates to a mobile communication network, and more particularly, to roaming and basic call processing of other network subscribers in a mobile communication network by using an existing public switched telephone network (PSTN) network. It relates to a method for performing the same mobile communication service.

In general, a mobile communication network is a communication system that targets mobile devices such as people, cars, ships, trains, and aircrafts, including mobile phones (mobile phones, vehicle phones), port phones, aircraft phones, mobile phones (trains, cruise ships, Installed on express buses), radio calls, radiotelephones, satellite mobile communications, amateur radio, and fishing service.

These mobile communications include the Advanced Mobile Phone Service (AMPS) system using analog methods, CDMA and TDMA (Time Division Multiple Access) systems using digital methods, and Frequency Division Multiple Access (FDMA) systems. System, etc.

1 is a network diagram of a general mobile communication system.

Here, reference number 1 is a mobile switching center (MSC) constituting a subscriber's call, 2 is a BS (base station) for communicating using a protocol in a wireless section, and 3 is a subscriber's mobile communication network. MS (Mobile Station, a mobile communication terminal) which is a terminal device to enable communication through, 4 is EIR (Equipment Identity Register, confirming whether the MS 3 is an authenticated terminal through the MSC (1), Terminal authentication device), 5 is a PSTN connected to the MSC 1 to perform a telephone service function, and 6 is an ISDN (Integrated Services Digital Network) network connected to the MSC 1 to provide a comprehensive information communication service. to be.

In addition, reference numeral 7 is a visitor location register (VLR) that manages the visitor's location and subscriber's registration information, and 8 is a database of basic information (including location information) and additional service information of the subscriber. A home location register (HLR) is managed, 9 is an AC (Authentication Center) that is connected to the HLR (8) to manage the authentication of the MS (3), 10 is the HLR ( 8 is a message center (MC) connected with 11), and 11 is a short message entity (SME) connected with the MC 10.

Thus, the MS 3 realizes a call through the BS 2 and the MSC 1.

Such a conventional mobile communication network has multiple operators and the same region is composed of a single network, and thus does not support roaming or call processing for other network subscribers, resulting in overlapping investment between operators, resulting in waste of resources. It was not easy to provide a complete service covering all service provision areas.

Here, roaming refers to a service for using a mobile communication terminal even within a service area of another communication service provider.

Accordingly, there was a problem in that the mobile subscriber was not provided with the service of the mobile carrier to which he subscribed, and the complaint about the service was raised because the mobile communication service was not provided in the area serviced by the mobile service provider. To this end, there was a problem of overlapping investment in the same area separately from other mobile communication providers.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to use a local network using a conventional PSTN network for roaming and basic call processing of other network subscribers rather than the local network in a mobile communication network. The present invention provides a roaming and call processing method for subscribers in a mobile communication network capable of performing a mobile communication service.

In order to achieve the above object, in the mobile communication network according to the present invention, another network subscriber roaming and call processing method uses a gateway between operators for a MAP (Mobile Application Part) signal when interworking with other operators in a mobile communication network. Functions as an interface to the protocol. In the present invention, when interworking with other companies in the mobile communication network, the service is divided into domestic and international networks, and call setup is performed through the existing PSTN network. In addition, the present invention uses a gateway for the MAP signal when interworking with other companies in the mobile communication network, and uses the existing PSTN network without making a dedicated line for matters related to general call processing. In addition, in the present invention, when a call is processed for another foreign provider in a mobile communication network, the other foreign provider can process the domestic network with a Temporary Local Directory Number (TLDN). Furthermore, the present invention recognizes that the subscriber of the other operator is divided by the network ID or the subscriber's number.

1 is a network diagram of a general mobile communication system,

2 is a configuration diagram of a multiple NPA network to which the present invention is applied;

3 is a flowchart illustrating a roaming method of another subscriber according to an embodiment of the present invention;

4 is a flowchart illustrating a call processing method of another subscriber according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

1: MSC 2: BS

3: MS 4: EIR

5: PSTN 6: ISDN

7: VLR 8: HLR

9: AC 10: MC

11: SME

Hereinafter, with reference to the accompanying drawings an embodiment according to the technical idea of the roaming and call processing method of the subscriber network in the present invention as described above in detail as follows.

First of all, if there are several operators in the mobile communication network and the contract is concluded with roaming or call processing with other network operators in the same area, the loss of duplicate investment can be reduced. By storing data on domestic or international networks for these other providers, in the case of international networks, it is possible to reduce costs and provide wider service to subscribers using conventional PSTN networks rather than call processing through direct links between operators. You can apply. Thus, the present invention can achieve good results in reducing the cost of service and support for the subscriber.

2 is a block diagram of a multiple NPA network to which the present invention is applied.

Reference numeral 20 is a self-network which is a network of one operator in a mobile communication network, 30 is another network which is a network of another provider, and 40 is a PSTN network.

Reference numerals 21 and 31 are MSC / VLR, 22 and 32 are HLR, and 23 and 33 are gateways.

Thus, MSC / VLR 21 and 31 of own network and other networks are connected to each other through PSTN network 40 by ISUP (ISDN User Part, ISDN user part), and also through gateways 23 and 33. .

As shown in FIG. 1, the MSC / VLR (1) (7) uses various kinds of MAP messages (i.e., commands) through various network elements such as the HLR (8) and different interfaces to process the call in the mobile communication network. It performs various functions such as location registration and location registration. These various types of MAP messages may be different even if they are the same operation depending on the protocol of the network. If the protocol is different between networks, it is impossible to interwork with each other. Therefore, as shown in FIG. 2, a protocol conversion function should be performed at the gateway between networks.

The MSC / VLR 21 of the own network 20 of FIG. 2 creates a database that stores the signal point and the state of the gateway with respect to the network ID and the operator identification number of other network operators.

3 is a flowchart illustrating a roaming method of another subscriber according to an embodiment of the present invention.

As shown in FIG. 2, when a location registration request of a subscriber terminal 34 belonging to another network operator is received, the MSC / VLR 21 of the own network 20 recognizes the terminal 34 of the other subscriber and recognizes the terminal 34 of the other network 20. Transmitting a location registration command to the gateway 23 (ST1 to ST3); A step (ST4) (ST5) of converting the command by protocol conversion in the gateway (23) of the own network (20) and then transmitting the converted command to the gateway (33) of the other network (30); The gateway 33 of the other network 30 recognizes the registration of the other network terminal 34 by routing to the HLR 32 to which the other network terminal 34 belongs, and recognizes the registration recognition result as a gateway of the own network 20. Transmitting to step 23 (ST6 to ST9); The gateway 23 of the own network 20 which has received the registration recognition result transmits the result to the MSC / VLR 21 of the own network 20, and the MSC / VLR 21 of the other network subscriber terminal 34 After the data is stored in the database, the step ST10 to ST12 of responding to the location update of the other subscriber station 34 is performed.

The roaming action of the target subscriber is described in detail as follows.

First, the location registration request of the subscriber station 34 belonging to the other network operator is input to the MSC / VLR 21 of the own network. The MSC / VLR 21 of the own network 20 then recognizes the terminal 34 of the other network subscriber and transmits a location registration command for registration recognition to the gateway 23 of the own network 20. In addition, the gateway 23 of the own network 20 converts the command by performing a protocol conversion according to the protocol of the other network 30, and then transmits the registered recognition command to the gateway 33 of the other network 30.

Then, the gateway 33 of the other network 30 receives the registration recognition command from the gateway of the own network 20 and routes it to the HLR 32 to which the other network terminal 34 belongs. Thus, the HLR 32 of the other network processes the recognition of the registration of the other network terminal 34, and transmits the registration recognition result to the gateway 33 of the other network. The gateway 33 of the other network 30 receiving the registration recognition result transmits the registration recognition response to the gateway 23 of the own network 20.

Thus, the gateway 23 of the own network 20 receives the registration recognition result and transmits the result to the MSC / VLR 21 of the own network 20. Then, the MSC / VLR 21 stores the data of the other subscriber station 34 in the database of the VLR and then transmits a location update response signal to the other subscriber station 34 in response to the location update of the other subscriber station 34. Roaming of other subscribers is performed.

4 is a flowchart illustrating a call processing method of another subscriber according to an embodiment of the present invention.

As shown in the drawing, when the incoming request for the other subscriber terminal 34, which is normally registered by the other subscriber roaming, is input to the other HLR 32 through the other MSC 31, the other HLR 32 is received. Recognizing that the called subscriber has roamed to another provider network and transmitting a routing request command to the other network gateway (ST21 ~ ST24); The other network gateway receiving the writing request command performs a protocol conversion according to the protocol of the own network (20) and then transmits a routing request command to the own network gateway (ST25) (ST26); The own network gateway 23 transmits a routing request command to the own network VLR 21, and the own network VLR 21 recognizes that the called party is another foreign provider and allocates a TLDN including a country code to process the domestic network. Enabling and transmitting a routing request response including a TLDN to the other network gateway 33 through the own network gateway 23 (ST27 to ST31); The other network gateway 33 receiving the routing request response including the TLDN transmits a writing request response including the TLDN to the other network MSC 31 through the other network HLR 32, and the other network MSC 31 A call setup is performed through the PSTN network 40 (ST32) and ST33.

The call processing action of such other subscribers will be described as follows.

First, when the incoming request for the other subscriber terminal 34, which is normally registered by the other subscriber roaming, is input to the other MSC 31, the other MSC 31 requests the location request by the incoming call routing request. Transmit to HLR 32.

Then, the other network HLR 32 recognizes that the called party has roamed to another provider network and transmits a routing request command to the other network gateway. The other network gateway receiving the writing request command performs a protocol conversion according to the protocol of the own network 20, and then transmits a routing request command to the own network gateway 23. In addition, the own network gateway 23 transmits a routing request command to the own network VLR 21.

Thus, the network VLR 21 receiving the routing request recognizes that the called party is a foreign provider, and includes the country code and network identification number for the international call in the existing TLDN to the home HLR 32 of the called party. 23) (33).

When the writing request response including the TLDN is transmitted to the other MSC 31 through the other HLR 32, the other MSC 31 receiving the request establishes a call through the existing PSTN network 40.

As described above, the present invention performs roaming services such as the local network using the existing PSTN network for roaming and basic call processing of other network subscribers in the mobile communication network.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. That is, the present invention can also be implemented for additional services when interworking with other networks. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the roaming and call processing methods of other network subscribers in the mobile communication network according to the present invention have an effect of supporting a service regardless of the region to the mobile subscribers.

Claims (1)

In mobile networks, In the MSC / VLR (Mobile Switching Center, Visitor Location Register) of the own network, creating a database for storing the signal point and the state of the gateway for the network ID and operator identification number of the other network operator; If the location registration request of the subscriber station belonging to the other network operator is received, and if the network ID and service provider identification number of the other network operator are in the MSC / VLR database, the subscriber's location registration command is transmitted to the own gateway to send a normal location registration command. In one case storing subscriber information in a database of the VLR; Converting the own network protocol to be suitable for the other network protocol, transmitting the message to the other network gateway, and routing the other network gateway to another network HLR (Home Location Register); When the incoming request for the other subscriber terminal whose location registration is normally registered by the other subscriber roaming is input to the other HLR through the other MSC / VLR, the other HLR is a TLDN (Temporary Local) through the gateway to the VLR where the called party is located. Transmitting a routing request obtained with Directory Number); Receiving the routing request, the VLR recognizes that the called party is a foreign destination and transmits it to the home HLR of the called party by including the country code and network identification number for the international call in the TLDN through the gateway; The other network MSC receiving the TLDN for the international call in response to the routing request performs the step of performing call setup through a public switched telephone network (PSTN) network.