KR20100038752A - Method and system for blocking a call during roaming - Google Patents

Abstract

PURPOSE: A method and a system for blocking a specific house in roaming in case a blocked target number is received are provided to reduce a burden of receiving charge by blocking the blocked target call by a GLR(Gateway Location Register). CONSTITUTION: A home location register(140) transmits a routing number allocation request message for getting roaming information of the received terminal. A gateway location register(130) determines whether the identification information in the routing number allocation request message and the identifying information of an originating terminal. An originating call of an originating mobile is blocked according to a determination result.

Description

Method and system for blocking a call during roaming}

The present invention relates to a method and a system for blocking a specific call when roaming, and more particularly, to manage a number to be blocked through a relay location register (GLR) when roaming occurs, The present invention relates to a method and a system for blocking a particular call when roaming, which is blocked when the call is received without transmitting the call to the called party.

The mobile communication system has been developed through the first generation analog Advanced Mobile Phone Systems (AMPS) method, the second generation cellular and personal communication service (PCS) method, and recently the third generation mobile communication system. IMT-2000 (International Mobile Telecommunication-2000) system is popular. IMT-2000 was developed for high speed data transmission and personal mobility guarantee to ensure mobility between countries by integrating systems of countries using different radio access standards. The IMT-2000 has been developed separately from a synchronous CDMA (Code Division Multiple Access) 2000 system centered on Korea and the United States, and a Universal Mobile Telecommunication Services (UMTS) or WCDMA system centered on Europe.

WCDMA system is leading the standardization in 3GPP (3 Generation Partnership Project). It is an asynchronous communication system developed by combining CDMA technology with European GSM method. It integrates various systems such as cellular, wireless telephone, wireless LAN and satellite communication. And provides international roaming to make calls anywhere in the world. Such international roaming is a service area of a home network (area currently serviced by an operator contracted by the owner of a terminal) in a plurality of networks operated by different operators. Network, the visited network acquires the location information of the terminal moved from the home network and, based on the acquired information, a call service and a short message service for the terminal. , An SMS), a multimedia message service (hereinafter, referred to as an MMS), and the like.

By the way, when the user of the called terminal which is roaming calls the user, the user of the called terminal bears the call charge, and there is a case that an incoming call is also made to the unwanted call. To prevent this, there is a need to block unwanted outgoing calls in advance. In particular, there is a need for a method for blocking voice calls and / or video calls by calling number using a relay location register (GLR) serving as a gateway when roaming.

The technical problem to be achieved by the present invention is to manage the number to be blocked in the relay position register (GLR) when roaming occurs, and when the number to be blocked is received, the call is not transmitted to the destination exchange. It is to provide a method and system for blocking a specific call when roaming, which can block.

The object of the present invention is not limited to the above-mentioned object, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention for achieving the above object, a method for blocking a specific call when roaming, roaming information of the called terminal in a method for blocking a specific call when roaming from the home network to the visited network Receiving a routing number assignment request message (PRN), which is a message for obtaining a message, from a home location register; Determining whether identification information included in the routing number assignment request message received from the home location register matches identification information of a calling terminal to be blocked; And according to a result of the determination, blocking an outgoing call of the calling terminal.

In addition, according to an embodiment of the present invention for achieving the above object, a system for blocking a specific call when roaming, in a system for blocking a specific call when roaming from the home network to the visited network, A home location register for transmitting a routing number assignment request message (PRN), which is a message for obtaining roaming information; A relay for determining whether the identification information included in the routing number assignment request message received from the home location register matches the identification information of the calling terminal to be blocked, and according to the determination result, blocking the originating call of the calling terminal. Include a location register.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the embodiment of the present invention as described above, by managing the number to be blocked in the relay location register (GLR) when roaming and blocking the call to be blocked, it is possible to reduce the burden of incoming charges for the roamer have.

In addition, by using a relay location register, which acts as a gateway when roaming, the call may be blocked to take advantage of the specificity of the roaming equipment.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and are common in the art to which the present invention pertains. It is provided to fully inform those skilled in the art of the scope of the invention, which is to be defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a block diagram of a system for blocking a specific call when roaming according to an embodiment of the present invention.

Referring to the system shown in FIG. 1, the home network includes a mobile terminal 100, a radio transceiver subsystem / radio network controller (RTS / RNC) 110, which is wirelessly connected to the mobile terminal 100, and a switch. (MSC) 120, a relay location register (GLR) 130 and a home location register (HLR) 140 interworking with the exchange 120. The visited network may include a mobile terminal 200, an overseas exchange 210, and an overseas roaming network 220.

First, the mobile terminal 100 of the home network and the mobile terminal 200 of the visited network are terminals capable of making and receiving voice calls and / or video calls through a circuit switched network (CSN). Herein, the mobile terminals 100 and 200 are voice calls and / or irrespective of names of mobile terminals such as cellular phones, personal communication service (PCS) phones, PDA phones, GSM phones, CDMA-2000 phones, WCDMA phones, and DMB phones. An embodiment of the present invention may be applied to a terminal having a function of making and receiving a video call.

The base station / base station controller (RTS / RNC) 110 serves to ensure the mobility of the terminal, and performs hand-off and radio resource management functions. The base station / base station controller (RTS / RNC) 110 configures an access network for circuit connection or packet connection of the mobile terminal 100 to the core network. Specifically, the base station (RTS) performs a radio access termination function with a subscriber station conforming to the 3rd Generation Partnership Project (3GPP) radio access standard. In particular, the base station (RTS) transmits and receives voice, video, and data traffic in a WCDMA manner. The base station controller (RNC) performs functions such as wired and wireless channel management, protocol matching with subscriber stations, protocol matching between base stations, soft handoff processing, core network protocol processing, general packet radio service (GPRS) access, fault management, and system loading. In charge.

The exchanger (MSC) 120 has a soft switching structure to speed up call processing in addition to the basic functions for voice communication in the existing IS-95B network. Here, soft switching is a technology capable of processing voice, data, and video signals with a high speed packet switch by upgrading a circuit switch of a conventional exchange to a software switch.

The overseas MSC 210 is a node interworking with the GLR 130 of the home network through the overseas roaming network 220 in the visited network. In addition, the overseas MSC 210 requests the GLR 130 to register the location of the mobile terminal 200 of the visited network, and the GLR 130 transmits it to the HLR 140 to thereby locate the mobile terminal 200. Information may be registered in the HLR 140 of the home network. The foreign exchange 210 according to the embodiment of the present invention allocates a routing number and transmits a response message to the relay location register 130 in response to the routing number assignment request message.

Switch 120 according to an embodiment of the present invention receives a call originated by the calling terminal 100, the location query message (SendRoutingInfo) to query the location of the called terminal 200 to the home location register 140 to be described later ; SRI).

The home location register (HLR) 140 stores and manages subscriber information, additional service information for each subscriber, and location information of a mobile communication terminal. In particular, the home location register 140 stores profile information of the sending and receiving terminals. This profile information includes the mobile identification number (MIN) (subscriber telephone number), the ESN (electric serial number) of the subscribing terminal, the subscribed additional service information, and the like. The home location register 140 according to an embodiment of the present invention receives a location query message from the switch 120 and receives a routing number assignment request message (PRN) which is a message for obtaining roaming information of the called terminal 200. Transmission to the relay position register (GLR) 130 to be described later. The routing number assignment request message PRN includes identification information of the calling terminal 100. Here, the roaming information may include a mobile station roaming number (MSRN) of the called terminal 200. The MSRN is the same concept as the TLDN, and is a number temporarily assigned to a mobile terminal by the MSC / VLR for call setup in the GSM standard and is not used as a dialing number.

The relay location register (GLR) 130 performs a function of a virtual home location register for the mobile terminal 200 roaming to the visited network, and may be established in the home network while the mobile terminal 200 roams. have. That is, when the mobile terminal 200 uses a roaming service, the GLR 130 registers location information and subscribed additional service information stored in the original home location register of the mobile terminal 200. In addition, the GLR 130 is used for roaming services between foreign and domestic networks using different Mobile Application Protocol (MAP) protocols (ANSI-41, GSM (Europe), PDC (Japan), UMTS, etc.). It can perform the function of converting to fit the protocol. In addition, the GLR 130 may perform a function of converting the telephone number of the mobile communication terminal to match the protocol of each communication network.

The relay location register 130 according to an embodiment of the present invention may include identification information included in the routing number assignment request message received from the home location register 140 described above, and the relay location register 130 may be registered and managed in advance. It determines whether or not the identification information of the calling terminal which is the blocking target. Here, the identification information may be unique information that can distinguish the terminal from other terminals, and may be the calling number of the calling terminal. The call number may be registered and managed by the relay location register 130 in advance.

In addition, the relay location register 130 according to an embodiment of the present invention is identification information (calling number) included in the routing number assignment request message received from the home location register 140 and the identification of the calling terminal to be blocked. If the information (calling number) matches, it is necessary to block, so that the above-mentioned error message (PRN ERR) not to assign a routing number without transmitting a routing number assignment request message to the switch 210 of the visited network described above. Send to home location register 140. This process will be described later with reference to FIG. 2.

In addition, the relay location register 130 according to an embodiment of the present invention is identification information (calling number) included in the routing number assignment request message received from the home location register 140, and identification of the calling terminal to be blocked. If the information (calling number) does not match, it is determined that it is normal because the call need not be blocked, and the routing number assignment request message may be transmitted to the switch 210 of the visited network. This process will be described later with reference to FIG. 3.

Hereinafter, a method of blocking a specific call when roaming based on the above-described system will be described with reference to FIGS. 2 and 3.

2 is a call flow diagram when a call is blocked in a method for blocking a specific call when roaming according to an embodiment of the present invention.

First, when the calling terminal 100 originates a call toward the switch 120 (S102), the switch 120 queries the home location register 140 with the location query message for querying the location of the called terminal 200 roaming ( SRI) is transmitted (S104).

The home location register 140 transmits a routing number assignment request message (PRN) for acquiring roaming information of the called terminal 200 to the relay location register 130 (S106). The roaming information herein may include a mobile station roaming number (MSRN) defined in the 3GPP standard.

Meanwhile, the relay location register 130 may predetermine identification information of originating terminals not desired to be received and register it in a database. In this state, the relay location register 130 extracts the identification information of the calling terminal from the routing number assignment request message received from the home location register 140 and compares it with the identification information registered in advance in the database. (S108).

That is, when the identification information (call number) included in the routing number assignment request message received by the relay location register 130 and the identification information (call number) of the blocking target terminal registered in advance in the database are the same, The routing number assignment request message MUST NOT be sent to the exchange in the visiting network. In this case, an error message (PRN ERR) not to be assigned a routing number is transmitted to the home location register 140 (S110). Then, the home location register 140 transmits an error message (SRI ERR) for the location query message (SRI) to the switch 120, thereby informing that the originating signal is blocked by the relay location register (130) (S112).

Here, in the case where the relay location register 130 transmits an error message (PRN ERR) to the home location register 140 in step S110, the relay location register 130 includes the corresponding error code by referring to the error code table for each blocking number. do. 4 is a diagram illustrating an error code table for each blocking number. The error code shown in FIG. 4 is defined in 3GPP 29.002, and the error code that can be set in the error message (PRN ERR) transmitted to the home location register 140 after the relay location register 130 blocks the call. It is an example. The outgoing signal blocked in the above-described process may be a voice call, a video call, or both.

Meanwhile, the above-described process of FIG. 2 has been described taking the case of outbounding roaming in which the called terminal exists in the visited network, but the embodiment of the present invention can be applied to the case of inbound roaming. That is, in the case of inbound roaming, the call flow of FIG. 2 may be applied on the assumption that the home location register 140 exists in the visited network.

3 is a call flow diagram in the case of roaming a call normally without blocking the call when roaming.

Referring to FIG. 3, the process up to S106 is the same as the process up to S106 in FIG. 2, and thus description thereof will be omitted. Subsequently, the relay location register 130 that has received the routing number assignment request message (PRN) identifies the identification information (call number) included in the routing number assignment request message and the terminal to be blocked previously registered in its database. If the information (calling number) does not match, it is determined to be normal and the routing number assignment request message is transmitted to the switch 210 of the visited network (S202). The exchange 210 of the visited network allocates a routing number (S204), and then transmits a response message to the relay number register request message to the relay location register 130 (S206).

The relay location register 130 transmits a response message for the routing number assignment request message to the home location register 140 (S208), and the home location register 140 transmits a response message for the location query message to the exchange 120. Transmit (S210).

The exchange 120 again transmits an incoming call attempt message (IAM) to the international gateway exchange 250 (S212), and the international gateway exchange 250 again attempts to make a call to the exchange 210 of the visited network ( S214). Finally, the switch 210 of the visited network causes the roamer 200 of the visited network to receive the call (S216).

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 is a block diagram of a system for blocking a specific call when roaming according to an embodiment of the present invention.

2 is a call flow diagram when a call is blocked in a method for blocking a specific call when roaming according to an embodiment of the present invention.

3 is a call flow diagram in the case of roaming a call normally without blocking the call when roaming.

4 is a diagram illustrating an error code table for each blocking number.

Claims (17)

In the method of blocking a specific call when roaming from the home network to the visited network, Receiving a routing number assignment request message (PRN), which is a message for obtaining roaming information of a called terminal, from a home location register; Determining whether identification information included in the routing number assignment request message received from the home location register matches identification information of a calling terminal to be blocked; And according to a result of the determination, blocking a call made by the originating terminal. The method of claim 1, Prior to the receiving step, And the exchange receiving the call originated by the originating terminal, sending a location query message (SRI) to the home location register to query the location of the called terminal. The method of claim 1, Prior to the receiving step, And registering and managing identification information of originating terminals to block a call. The method according to any one of claims 1 to 3, The blocking step, When the identification information (calling number) included in the received routing number assignment request message and the identification information (calling number) of the originating terminal to be blocked match, the routing number assignment request message is exchanged by the switch of the visited network. And sending an error message (PRN ERR) to the home location registrant not transmitting the routing number and not assigning a routing number. The method according to any one of claims 1 to 3, The blocking step, If the identification information (calling number) included in the received routing number assignment request message and the identification information (calling number) of the calling terminal to be blocked do not match, it is determined to be normal and the routing number assignment request message is determined. Sending a call to the exchange of the visited network. The method of claim 5, The blocking step, Assigning, by the exchange of the visited network, the routing number; And sending a response message to the relay location registrar in response to the routing number assignment request message. The method of claim 1, The roaming information, A method for blocking a particular call when roaming, comprising a mobile station roaming number (MSRN). The method of claim 1, The identification information included in the routing number assignment request message includes an identification number of the originating terminal. The method of claim 1, The originating signal is at least one of a video call and an audio call. In the system for blocking a specific call when roaming from the home network to the visited network, A home location register for transmitting a routing number assignment request message (PRN), which is a message for obtaining roaming information of a called terminal; A relay for determining whether the identification information included in the routing number assignment request message received from the home location register matches the identification information of the calling terminal to be blocked, and according to the determination result, blocking the originating call of the calling terminal. A system for blocking a particular call when roaming, comprising a location register. The method of claim 10, And a switch receiving the call originated by the originating terminal and sending a location query message (SRI) to the home location register to query the location of the called terminal. The method of claim 10, The relay position register, A system for blocking a particular call during roaming, which registers and manages identification information of calling terminals to block a call. The method according to any one of claims 10 to 12, The relay position register, When the identification information (calling number) included in the received routing number assignment request message and the identification information (calling number) of the originating terminal to be blocked match, the routing number assignment request message is exchanged by the switch of the visited network. And transmit an error message (PRN ERR) to the home location registrar not transmitting a routing number to the home location registrar. The method according to any one of claims 10 to 12, The relay position register, If the identification information (calling number) included in the received routing number assignment request message and the identification information (calling number) of the calling terminal to be blocked do not match, it is determined to be normal and the routing number assignment request message is determined. To block the specific call when roaming; The method of claim 14, The exchange of the visited network, Allocating the routing number and sending a response message to the relay location register to the relay location register. The method of claim 10, The roaming information, A system for blocking a specific call when roaming, comprising a mobile station roaming number (MSRN). The method of claim 10, The identification information included in the routing number assignment request message includes an identification number of the originating terminal.

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