KR101076094B1 - Apparatus and method for preventing call forwarding - Google Patents

Abstract

The present invention relates to an apparatus and a method for blocking a call transfer, and to providing a zone service that provides a fee benefit for call processing between mobile communication terminals existing in a certain area, a called terminal is set to call transfer to a separate terminal. The present invention relates to an apparatus and a method for blocking call transfer to block call processing to a terminal for which call transfer has been set.

The apparatus for blocking call transfer according to an embodiment of the present invention includes a determination unit for determining whether a calling terminal requesting a call by zone service and a called terminal targeted for the call exist in a service area, and the determination result. And a message generating unit for generating a connection message including information indicating a restriction of call transfer and a communication unit for transmitting the connection message.

Zone Service, Call Forwarding, Call Diversion Treatment Indicator (CDTI), Service Area

Description

Apparatus and method for preventing call forwarding}

The present invention relates to an apparatus and a method for blocking a call transfer, and more particularly, in providing a zone service that provides a fee benefit for call processing between mobile communication terminals existing in a certain area, wherein a called terminal is a separate terminal. The present invention relates to an apparatus and a method for blocking a call transfer to block call processing to a call transfer set terminal when the call transfer is set.

Zone service is a service that provides a fee benefit for call processing between mobile communication terminals existing in a certain area.

For example, a call may not be charged for calls made between two terminals existing within a specific spatial area such as a corporate office, a building, or a school campus.

On the other hand, there is a case of exploiting this by using the function of the zone service.

That is, the zone service is to give a fee benefit to the call between the terminal A and the terminal B existing in the area, and when the terminal B is transferred to the terminal C existing outside the area, the mobile communication system is the terminal A Because terminal B and terminal B are in the same area, they still give a fee benefit.

In other words, the zone service aims to grant a fee benefit for calls between terminal users existing in a specific area, but the fee for the call between terminal A and terminal C even though terminal C does not exist in the area. The benefits are still being granted.

Accordingly, there is a need for the emergence of the invention to prevent fraudulent use by call transfer in providing zone services.

The present invention provides a zone service that provides a fee benefit for call processing between mobile communication terminals existing within a certain area. When the called terminal is set to call transfer to a separate terminal, call processing to a call divert terminal is performed. The purpose is to be blocked.

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

In order to achieve the above object, the apparatus for blocking a call transfer according to an embodiment of the present invention is determined to determine whether the calling terminal requesting the call by the zone service and the called terminal targeted for the call exists in the service area. And a message generation unit for generating a connection message including information indicating the restriction of call transfer according to the determination result, and a communication unit for transmitting the connection message.

An apparatus for blocking call transfer according to another embodiment of the present invention includes a confirmation unit for confirming whether information indicating a limitation of call transfer for a called terminal is included in a received routing information request message and routing information according to the confirmation result. It includes a communication unit for transmitting a response message indicating that the provision of.

According to an embodiment of the present invention, a method for blocking call transfer includes determining whether an originating terminal requesting a call by a zone service and a called terminal targeted for the call exist in a service area, and according to the determination result. Generating a connection message that includes information indicating a restriction of call transfer and transmitting the connection message.

According to another aspect of the present invention, there is provided a method of blocking a call transfer by checking whether information indicating a limitation of call transfer to a called terminal is included in a received routing information request message, and determining the routing information according to the result of the checking. Sending a response message indicating that provision is not possible.

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

According to the apparatus and method for blocking call transfer according to the present invention as described above, in providing a zone service that provides a fee benefit for call processing between mobile communication terminals existing in a certain area, the called terminal is called as a separate terminal. If the call is set, the call processing to the call transfer set terminal is blocked, thereby preventing the expense of the negative use of the zone service.

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

1 is a conceptual diagram illustrating that call transfer is blocked when a zone service call request is generated according to an embodiment of the present invention.

Zone service is a service that grants a fee benefit to call processing between mobile communication terminals existing in a certain area. For example, as shown in FIG. When present in a certain area (hereinafter, referred to as a service area) 100, a call may not be applied to a call between the calling terminal 111 and the called terminal 112.

To this end, the calling terminal 111 and the called terminal 112 should be subscribed to the zone service in advance. In providing the zone service, the mobile communication system can maintain information matching the subscribed terminal and the service area.

That is, the terminal A and the terminal B subscribed to the zone service for the first service area can receive the zone service in the first service area, and both of the terminal A and the terminal B exist in the second service area. Even though the terminal A and the terminal B are not subscribed to the zone service for the second service area, the terminal A and the terminal B cannot receive the rate benefit by the zone service.

In addition, the zone service is not provided only between two terminals, but two or more terminals may subscribe to the service.

For example, the terminal A, the terminal B and the terminal C can all subscribe to the zone service for the first service area, and two terminals (A and B, B, C, and C that exist in the first service area). Fees are granted for sessions established between A and A).

On the other hand, there is a case of abusing such zone service, and the incoming terminal 112 registered in the call transfer to a separate terminal 120 existing outside the service area 100 exists in the service area 100. When the calling terminal 111 attempts to make a call request to the called terminal 112 in the state, the mobile communication system transmits a call to the called terminal 112 to another terminal (hereinafter referred to as a call switching terminal) 120. Call) to configure a call between the calling terminal 111 and the call switching terminal (120). At this time, since both the calling terminal 111 and the called terminal 112 exist in the service area 100, the mobile communication system still gives a fee benefit to the call request of the calling terminal 111.

On the other hand, in the mobile communication system according to the embodiment of the present invention, even when the destination terminal 112 is registered to transfer the call to the call transfer terminal 120, the call request by the zone service by the originating terminal 111 occurs If not, call transfer is not performed.

2 is a diagram illustrating a mobile communication system according to an exemplary embodiment of the present invention, wherein the mobile communication system 200 includes a base station 211 and 212, a radio network controller (RNC) 220, and a mobile communication exchanger ( Mobile Switching Center (MSC) 230, Equipment Identity Register (EIR) 240, Home Location Register (HLR) 250, Authentication Center (AuC) 260, And a Short Message Service Center (SMSC) 270 and a Service Control Point (SCP) 280.

The terminals 111, 112, and 120 may be mobile communication devices such as a mobile phone or a personal digital assistant (PDA). The terminals 111, 112, and 120 may have a terminal identifier. The terminal identifier is a unique value for identifying the terminal from another terminal, and may be assigned for each terminal by the terminal manufacturer or an authorized institution when the terminals 111, 112, and 120 are produced.

An information card including a subscriber identifier may be connected to the terminals 111, 112, and 120. The subscriber identifier is unique information for identifying a subscriber, for example, an International Mobile Subscriber Identity (IMSI).

The information card may be detachably connected to the terminals 111, 112, and 120, or may be fixed to the terminals 111, 112, and 120 so that the subscriber does not arbitrarily detach the information card from the terminals 111, 112, and 120. have. The information card may include a memory capable of storing data and a central processing unit (CPU) capable of performing a predetermined operation. Examples of such information cards include a subscriber identity module (SIM) card and a universal subscriber identity module (USIM) card.

In FIG. 2, each of the devices constituting the mobile communication system 200 is illustrated one by one. However, this is only an outline of the basic configuration of the mobile communication system 200, but the present invention is not limited thereto. Therefore, the mobile communication system 200 may include a plurality of respective devices, and some equipment may be removed and operated. In addition, the mobile communication system 200 may be operated by integrating two or more devices into one, and a function performed by one device may be divided into a plurality of devices.

The base stations 211 and 212 are primary access points of the terminals 111, 112 and 120, and may transmit and receive various signals and data with the terminals 111, 112 and 120. That is, the base stations 211 and 212 may perform a wireless modem function consisting of an antenna and a transmission / reception modem. The communication channel toward the base station from the terminals 111, 112, and 120 is called an uplink channel, and the communication channel from the base stations 211 and 212 to the terminals 111, 112, and 120 is called a downlink channel.

2 shows a caller terminal 111 and a receiver terminal 112 in a cell formed by the first base station 211, that is, a service area 100, and a call in a service area formed by the second base station 212. It has shown that the switching terminal 120 exists. However, the service area 100 according to an embodiment of the present invention may be understood to represent a cell formed by a repeater (not shown) instead of only a cell formed by the base stations 211 and 212, and may include two or more base stations or It may be understood to represent a cell formed by a combination of repeaters.

The radio network controller 220 may control the base stations 211 and 212 and manage radio resources. More specifically, the radio network controller 220 may instruct the base stations 211 and 212 to allocate the communication channel to the terminals 111, 112 and 120, and control the transmission output of the base stations 211 and 212. . In addition, the wireless network controller 220 may support handover for the terminals 111, 112, and 120 moving between the base stations 211 and 212.

The mobile communication exchange 230 may be connected to one or more radio network controllers 220 to relay communication of the terminal period.

The equipment identity register 240 may manage terminal identifiers of terminals produced by the terminal manufacturer. An example of the terminal identifier is IMEI (International Mobile Equipment Identity). The terminal identifier of the newly produced terminal may be obtained directly from the terminal manufacturer, or may be obtained from a server (not shown) that handles registration for the new terminal of each manufacturer.

The service control device 280 may manage the intelligent network service to be provided to the terminals 111, 112, and 120. For example, the service control device 280 may manage a message transmission service based on Short Message Service (SMS) or Unstructured Supplementary Services Data (USSD) with respect to the terminals 111, 112, and 120.

Preferably, the service control device 280 may drive the service logic suitable for the terminal (111, 112, 120) according to the attribute information of the terminal (111, 112, 120). The service control device 280 may manage attribute information of various terminals produced by the terminal manufacturer. Of course, there is a separate server (not shown) that manages the attribute information, and the service control device 280 may access the corresponding server to check the attribute information of the terminals 111, 112, and 120. The attribute information may include the language supported by the terminals 111, 112, and 120, the screen resolution of the terminals 111, 112, and 120, and the type of codec provided in the terminals 111, 112, and 120. , 112, and 120 may include information representing the function or performance of the server.

In addition, the service control device 280 according to an embodiment of the present invention serves to block call transfer by the called terminal 112 when receiving a zone service call request from the calling terminal 111. To this end, the service control device 280 may insert information indicating the restriction of call transfer into the connection message transmitted to the mobile communication exchange 230.

The home location register 250 may manage location information of the subscriber (eg, a VLR (Visitor Location Register) address, MSC address, etc. where the terminals 111, 112, and 120 are currently located) and subscriber additional service information. have.

In addition, the home location register 250 according to an embodiment of the present invention may ignore the routing information request for the call transfer terminal 120 in response to the zone service call request and may not provide the routing information. Accordingly, call transfer to the call transfer terminal 120 may be blocked.

The short service center 270 is a device for transmitting and receiving text messages, and performs a function of storing and transmitting a text message requested to be transmitted.

The authentication center 260 may support authentication for the mobile subscriber and encryption function for the wireless call interval. Although the authentication center 260 is shown as a device independent from the home location register 250 in FIG. 2, the authentication center 260 may be included in the home location register 250.

3 is a block diagram illustrating an apparatus for blocking call transfer according to an embodiment of the present invention, wherein the apparatus for blocking call transfer of FIG. 3 includes a service control device 280 constituting the mobile communication system 200 of FIG. As it can be understood as below, the apparatus for blocking call transfer of Figure 3 will be referred to as a service control device 280.

The service control device 280 includes a communication unit 310, a storage unit 320, a controller 330, a message generator 340, and a determiner 350.

The determination unit 350 determines whether the originating terminal 111 requesting the call by the zone service and the destination terminal 112 that is the target of the call exist in the service area 100. To this end, the determination unit 350 may request the location of the calling terminal 111 and the called terminal 112 from the home location register 250. The operation of the determination unit 350 may be performed when an IDP (Initial Detection Point) is received from the mobile communication exchange 230.

Also, the determination unit 350 determines whether the calling terminal 111 and the called terminal 112 are subscribed to the zone service before determining whether the calling terminal 111 and the called terminal 112 exist in the service area 100. Can be determined. To this end, the determination unit 350 may refer to a zone service table (not shown) stored in the storage unit 320.

That is, in the zone service table, a mapping relationship between the calling terminal 111 and the called terminal 112 subscribed to the zone service may be specified. The determination unit 350 may refer to the calling terminal 111 and the called terminal. It is possible to determine whether to subscribe to the zone service (112).

The storage unit 320 may include a hard disk, a flash memory, a compact flash card (CF), a secure digital card (SD), a smart card (SM), a multimedia card (MMC) or a memory stick. May be provided inside the service control device 280 as a module capable of inputting / outputting, or may be provided in a separate device.

The message generator 340 generates a connection message including information indicating the restriction of call transfer according to the determination result of the determiner 350. That is, when it is determined that the originating terminal 111 and the terminating terminal 112 exist in the service area 100 according to the determination result of the determination unit 350, the message generator 340 indicates the restriction of call transfer. It generates a connection message with information.

Here, the service area 100 refers to a spatial area that the calling terminal 111 and the called terminal 112 previously set to receive the zone service. Therefore, the message generator 340 may not include the information indicating the restriction of call transfer in the connection message simply because the calling terminal 111 and the called terminal 112 exist in the same service area.

The information indicating the call transfer restriction includes a call diversion treatment indicator (CDTI). In generating a connection message, the message generator 340 transfers the call to a service interaction indicator (SII). You can include processing indicators and service interaction indicators in connection messages.

The communicator 310 performs a role of transmitting the connection message generated by the message generator 340. In addition, the communication unit 310 receives the IDP from the mobile communication switch 230, and transmits a message requesting the location of the calling terminal 111 and the called terminal 112 to the home location register 250. Can be.

The controller 330 performs overall control of the communicator 310, the storage 320, the message generator 340, and the determiner 350, and relays data transmitted and received between modules.

FIG. 4 is a block diagram showing another apparatus for blocking call transfer according to another embodiment of the present invention, wherein the apparatus for blocking call transfer in FIG. 4 is a home location register 250 constituting the mobile communication system 200 of FIG. As shown in FIG. 4, a device for blocking call transfer of FIG. 4 will be referred to as a home location register 250.

The home location register 250 includes a communication unit 410, a storage unit 420, a controller 430, a message generator 440, and a confirmation unit 450.

When the routing information request message (SRI; Send Routing Information) is received, the verification unit 450 checks whether information indicating the restriction of call transfer to the destination terminal 112 is included in the received routing information request message. Do this. Here, the information indicating the restriction of call transfer can be understood as the above-mentioned call transfer processing indicator.

That is, the mobile communication exchange 230 may request routing information to the called terminal 112. The confirmation unit 450 may include a call transfer processing indicator included in the routing information request message received from the mobile communication exchange 230. It is to check if it is set to limit call transfer.

The message generator 440 serves to generate a response message. Here, the response message may include a response message (hereinafter, referred to as a location response message) for a location request of the terminal and a response message (hereinafter, referred to as a routing information response message) for a routing information request.

In addition, the message generator 440 may generate a routing information response message including extraction failure information instead of routing information as a response message to the routing information request.

That is, when it is confirmed that the call transfer is limited according to the confirmation result by the confirming unit 450, the message generator 440 may provide information indicating that the extraction of the routing information of the call transfer terminal 120 has failed. It is included in the response message.

The communication unit 410 receives a location request message (hereinafter, referred to as a location request message) and a routing information request message for a terminal, and transmits a location response message and a routing information response message.

When the location request message or the routing information request message is received, the controller 430 extracts the location or routing information of the terminal from the storage 420. Accordingly, the storage unit 420 preferably stores location information and routing information of the terminal.

In addition, the controller 430 performs overall control of the communication unit 410, the storage unit 420, the message generator 440, and the confirmation unit 450, and relays data transmitted and received between each module. do.

5 is a flowchart illustrating a process of blocking call transfer according to an embodiment of the present invention.

The originating terminal 111 transmits a zone service call request to the mobile communication exchange 230 (S501). The user of the calling terminal 111 may add a separate code to the zone service call request to distinguish it from the general call request. For example, the user of the calling terminal 111 may input the number of the called terminal 112 together with the code "# 1234". It is.

Upon receiving the zone service call request, the mobile communication exchange 230 transmits an IDP to the service control device 280 (S502).

The IDP may include information about the calling terminal 111 and the called terminal 112, with reference to this the service control device 280 determines the location of the terminal (S503). That is, it is determined whether the calling terminal 111 and the called terminal 112 exist in the service area 100.

Thus, when it is determined that the calling terminal 111 and the called terminal 112 do not exist in the service area 100, the service control device 280 may not proceed to the subsequent operation.

Meanwhile, when it is determined that the calling terminal 111 and the called terminal 112 exist in the service area 100, the service control device 280 transmits a connection message to the mobile communication exchange 230 (S504). .

Here, the connection message may include information indicating the restriction of call transfer. That is, the service control device 280 includes the call transfer processing indicator in the service interaction indicator after setting the call transfer to be restricted, and includes the service interaction indicator in the connection message.

The mobile communication exchange 230 receiving the connection message transmits a routing information request message to the home location register 250 (S505). Here, the routing information request message may include a call transfer processing indicator configured to limit call transfer.

Receiving the routing information request message, the home location register 250 transmits a Provisione Roaming Number (PRN) to the mobile communication exchange (hereinafter referred to as the destination exchange) of the terminating terminal 112 in response thereto. On the other hand, in the present invention, since the originating terminal 111 and the terminating terminal 112 exist in the same service area, the mobile communication exchange (hereinafter referred to as originating exchange) and the terminating exchange of the originating terminal 111 may be regarded as the same. Can be.

The destination exchange 230 receiving the PRN transmits a Mobile Station Roaming Number (MSRN) to the home location register 250, and the home location register 250 transmits a routing information response message including the same to the originating exchange 230. (S506)

Through such a process, call processing between the originating exchange 230 and the destination exchange 230 proceeds. As described above, the originating exchange 230 and the destination exchange 230 are identical in the present invention.

At this time, due to various reasons (for example, during an incoming terminal call, no answer, and access restriction), the incoming call to the terminating terminal 112 may not be formed (S507). Accordingly, the mobile communication exchange 230 may The routing information request message is transmitted to the home location register 250 (S508). That is, the mobile communication exchange 230 transmits a routing information request message to request routing information of the call switching terminal 120. The home location register 250 receives the call information included in the routing information request message. The switch processing indicator may be checked (S509), and routing information may not be provided according to the result. Here, the routing information request message may include information indicating that the request message is a routing information request for call transfer.

When the call transfer processing indicator is set to be limited to the call transfer, the home location register 250 may not provide routing information. Accordingly, the call transfer process is not performed.

At this time, the home location register 250 may include information indicating that the extraction of the routing information has failed in the routing information response message and transmit the information to the originating exchange 230 (S510). Accordingly, the originating exchange 230 may With reference to the received routing information response message, a guide message indicating that call transfer failed may be transmitted to the calling terminal 111 (S511).

6 is a flowchart illustrating a process of transmitting a connection message including call blocking information according to an embodiment of the present invention.

The service control apparatus according to the embodiment of the present invention receives a zone service call request from the calling terminal 111 (S610).

Accordingly, the service control device 280 checks whether the calling terminal 111 and the called terminal 112 exist in the service area 100 (S620). That is, it is to confirm whether the calling terminal 111 and the called terminal 112 exist in the service area 100 on the zone service registered beforehand. To this end, the service control device 280 may inquire the location of each terminal 111 and 112 to the home location register 250.

Thus, when it is confirmed that the calling terminal 111 and the called terminal 112 exist in the service area 100, the service control device 280 inserts call blocking information into the connection message (S630). That is, by inserting information indicating that call transfer is restricted to the connection message, the connection message is transmitted to the originating exchange 230 (S640).

In addition, the originating exchange 230 transmits the routing information request message including the call blocking information to the home location register 250, even if a failure of the incoming call by the destination terminal 112 occurs during the call processing. ) Does not perform call transfer.

7 is a flowchart illustrating a process of transmitting routing information according to an embodiment of the present invention.

Receiving a routing information request message from the mobile communication exchange 230 (S710), the home location register 250 transmits a routing information response message in response (S720). At this time, the home location registerer 250 may determine whether the destination terminal is a call transfer terminal by referring to the routing information request message. The home location register 250 is the destination terminal of the routing information request message received at the present step. ) Transmits a routing information response message including routing information to the called terminal. The routing information response message may include the MSRN received from the mobile communication exchange 230.

On the other hand, when an incoming failure occurs by the terminating terminal 112 of the mobile communication exchange 230 that receives the routing information response message including the MSRN, the home location register 250 reroutes from the mobile communication exchange 230. The information request message may be received (S730), at which time the home location register 250 checks whether the destination terminal is a call transfer terminal.

Thus, when it is determined that the destination terminal is the call transfer terminal, the home location register 250 checks whether the call transfer is allowed for the called terminal 112 (S740).

That is, the home location registerer 250 checks whether the call is switched by referring to the call transfer processing indicator included in the routing information request message.

Thus, when it is determined that call transfer is allowed, the home location registerer 250 transmits a routing information response message including routing information to the mobile communication switch 230 (S750), and it is confirmed that call transfer is not allowed. If the home location register 250 transmits a routing information response message including the information indicating that the extraction of the routing information failed to the mobile communication switch (230) (S760).

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. You will understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 is a conceptual diagram illustrating that call transfer is blocked when a zone service call request is generated according to an embodiment of the present invention.

2 is a diagram illustrating a mobile communication system according to an embodiment of the present invention.

3 is a block diagram illustrating an apparatus for blocking call transfer according to an embodiment of the present invention.

4 is a block diagram showing an apparatus for blocking call transfer according to another embodiment of the present invention.

5 is a flowchart illustrating a process of blocking call transfer according to an embodiment of the present invention.

6 is a flowchart illustrating a process of transmitting a connection message including call blocking information according to an embodiment of the present invention.

7 is a flowchart illustrating a process of transmitting routing information according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

310: communication unit 320: storage unit

330: control unit 340: message generating unit

350: judgment

Claims (10)

A determination unit that determines whether a calling terminal requesting a call by a zone service (a service granting a fee benefit to a communication service between terminals existing within a predetermined region) and a called terminal which is the target of the call exist in a preset service region; A message generator for generating a connection message including information indicating a restriction on call transfer according to the determination result; And And a communication unit for transmitting the connection message. delete The method of claim 1, The information indicating the restriction of the call transfer includes a call diversion treatment indicator (CDTI), And the message generator includes the call transfer processing indicator in a service interaction indicator (SII) and blocks the call transfer by including the service interaction indicator in the connection message. A confirmation unit for confirming whether information indicating a restriction of call transfer to the called terminal is included in the received routing information request message; And And a communication unit which transmits a response message indicating that it is impossible to provide routing information according to the confirmation result. The method of claim 4, wherein The information indicating the restriction of the call transfer is a device for blocking a call transfer comprising a call diversion treatment indicator (CDTI). Determining whether a calling terminal requesting a call by a zone service (a service providing a fee benefit for a communication service between terminals existing within a predetermined region) and a called terminal which is the target of the call exist in a preset service region; Generating a connection message including information indicating a limitation of call transfer according to the determination result; And Sending the connection message. delete The method of claim 6, The information indicating the restriction of the call transfer includes a call diversion treatment indicator (CDTI), The generating of the connection message may include including the call transfer processing indicator in a service interaction indicator (SII); And Including the service interaction indicator in the connection message. Checking whether information indicating a restriction of call transfer to a called terminal is included in a received routing information request message; And Transmitting a response message indicating that routing information cannot be provided according to the confirmation result. The method of claim 9, The information indicating the restriction of the call transfer comprises a call diversion treatment indicator (CDTI).

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