KR20070096162A - Spam call blocking service system and method - Google Patents

Abstract

A spam call blocking service system and method are provided to process a call whose origination phone number is disguised as a general telephone number, as a spam call reliably. An origination MSC(Mobile Switching Center)(10) processes call origination as a spam call originator attempts it. When the originated call signal is transferred from the origination MSC(10), a mobile relay MSC(20) requests checking of subscriber information, and attempts call termination to a termination MSC(40) where a destination call subscriber is located. In response to a request for checking whether the originated call is a spam call, the mobile relay MSC(20) attempts reverse call origination to the caller to check whether the call is a spam call. When the received call is a spam call, the mobile relay MSC(20) blocks call termination to the destination call subscriber, thus providing a spam call blocking service. An HLR(Home Location Register)(30) stores and manages information about whether a mobile communication subscriber has been subscribed to (or activated) the spam call blocking service, searches subscriber information and transmits a corresponding result when the mobile relay MSC(20) requests the subscriber information. In this case, the HLR(30) checks whether the callee has been subscribed to the spam call blocking service. When the callee has been subscribed to the spam call blocking service, the HLR(30) requests the mobile relay MSC(30) to check whether a call of a caller who attempts call origination to the MSC(20) is a spam call.

Description

Spam Call Blocking Service System And Method

1 is a block diagram showing a spam call blocking service system according to an embodiment of the present invention.

2 is a call processing procedure for explaining the operation of the spam call blocking service system according to an embodiment of the present invention.

Figure 3 is a flow chart for explaining the operation of the spam call blocking service system according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: outgoing exchange 20: mobile relay exchange

30: home location register 40: incoming exchange

The present invention relates to a spam call blocking service, and in particular, attempts to reverse the outgoing calls requested to the service subscribers and tries to reverse the incoming calls when the answering machine is confirmed by the answering machine. The present invention relates to a call blocking service system and method.

Recently, with the development of mobile communication, many people have used mobile communication terminals such as mobile phones, PCS, PDA, DMB phones, etc., and by providing caller ID (CID) service in terms of personal convenience and privacy infringement protection, By leaving the other party's information on the incoming call to eliminate the frustration, the caller's phone number is notified in advance so that the incoming call can be selectively received.

Meanwhile, with the development of mobile communication, a separate telecommunication business using a mobile communication terminal is actively being developed. A separate telecommunication business means providing a telephone service by renting or installing a part of a telecommunication facility from a main telecommunication service provider. For example, 060, 080, and 700 voice information services that provide services such as coloring services that generate sound effects during the call connection process, Internet phone services that use telephones to make phone calls, and advertisements, fortune telling, entertainment, and life information. And the like. Separate carriers use spam texts and / or spam calls as a means to promote themselves.

Such spam texts and / or spam calls have been conventionally blocked by spam texts using advertisement words and outgoing telephone numbers contained in the spam texts. However, in case of spam call, the anti-spam processing is performed using only the outgoing phone number. If you try to disguise your outgoing phone number as a normal phone number and try to make a call, the outgoing phone number of the spam phone is different from the normal phone number. There is a problem that normal spam blocking processing is impossible in terms of system (exchange) because it is not distinguished.

The present invention has been made to solve the above-mentioned problems, and its object is to make a call back to the outgoing call requested to the spam call blocking service subscribers to check whether or not a spam call.

Another object of the present invention is to automatically send an outgoing call subscriber by sending a call back to an outgoing call so that the incoming call subscriber can make a call before answering. It is possible to block spam calls using a response device in advance, and also to reliably block spam even when a spam call is generated by disguising an outgoing phone number as a general phone number.

A feature of the present invention for solving the above object is a system for blocking spam calls generated by a spam call sender using an automatic answering device, and performing outgoing call processing according to an attempt to send the spam call sender. An originating exchange; When the outgoing call signal is transmitted from the outgoing exchange, the subscriber information inquiry is requested, and the incoming call subscriber is attempted to the destination exchange in which the incoming call subscriber is located according to the subscriber location information transmitted as a result of the subscriber information inquiry, and the spam check for the outgoing call is confirmed. A mobile relay exchange which attempts to reverse the caller to the caller side when requested and checks whether the call is a spam call, and provides a spam call blocking service by blocking an incoming call to the called subscriber when the call is detected as a spam call; A database that manages various information of mobile subscribers, and stores and manages information on whether to subscribe (or active) spam call blocking service for individual mobile subscribers, and retrieves subscriber information when requesting subscriber information of the mobile relay switch. The home location register which transmits the result of the subscriber information inquiry, checks whether the called party is a subscriber of the spam call blocking service and, if confirmed as a subscriber of the spam call blocking service, requests the mobile relay exchange to check the spam status of the caller currently attempted to send. To implement a spam call blocking service system comprising a.

Here, the mobile relay exchange, when the home location register requests to check whether or not spam from the home location register, attempts to make a reverse call using an outgoing call number included in an outgoing call signal, and then an ISUP (ISDN User Part) message for the outgoing call. It is characterized by checking whether the ANM (ANswer Message) message is received to determine whether the outgoing call is a spam call.

And, the home location register, in requesting confirmation of the spam for the caller currently attempting to send to the mobile relay switch, a list of unsubscribed telephone numbers for the subscriber (recipient) who requested the subscriber information inquiry from the mobile relay switch; Or checking whether the caller's telephone number is present in a list of phone numbers, and checking whether the caller is a spam check request object, and when the caller is a spam check request object, requests for confirmation of spam from the mobile relay exchange. It is done.

In addition, the home location register, if the caller's phone number is present in the called party's unsubscribed phone number list, notifies the mobile relay switch that the caller is the recipient to be blocked, and blocks the incoming call subscriber. If the caller's telephone number exists in the called party's telephone number list, the subscriber information inquiry result is transmitted to the mobile relay switch.

According to another aspect of the present invention, when an outgoing call signal is transmitted from any originating exchange, a request for inquiring subscriber information to a home location register is requested by the mobile relay exchange using the called party information and / or the calling party information included in the outgoing call signal. Process; Requesting the mobile relay exchange to confirm spam for the outgoing call when the home location register searches for subscriber information on the called party who has requested the subscriber information inquiry and is identified as a spam call blocking service subscriber; Confirming whether the call is spam by attempting a reverse call from the mobile switching center to the caller of the outgoing call according to the spam check request; When it is determined that the outgoing call is a spam call, the terminal terminates the outgoing call and blocks the incoming call to the called party to provide a spam call blocking service method.

Here, the process of requesting confirmation of spam for the outgoing call may include receiving a subscriber's information by searching for subscriber information using the called party's information received from the mobile relay switch at the home location register when requesting the subscriber's information inquiry from the mobile relay switch. Checking whether the subscriber is a blocked service; Performing a subscriber information inquiry when the called party is not a subscriber to a spam call blocking service, and transmitting the subscriber information inquiry result to the mobile relay switch to attempt to receive the called party; If the called party is a subscriber of the spam call blocking service, transmitting the subscriber information inquiry result to the mobile relay switch in response to the request for inquiring the subscriber information, and requesting confirmation of spam regarding the outgoing call. do.

In addition, the request for confirmation of spam for the outgoing call may include: when the called party is identified as a spam call blocking service subscriber, the home location register searches the called party's unsubscribed phone number list and / or the calling phone number list. Checking whether a telephone number identical to the telephone number exists; Recognizing the caller as a spam confirmation request object and requesting a mobile relay exchange to confirm spam if the caller's phone number does not exist in the called party's unsubscribed telephone number list or the telephone number list; If the caller's telephone number is present in the called party's unsubscribed telephone number list, notifying the mobile relay switch that the caller is the subject of rejection and blocking the incoming call subscriber; And when the caller's telephone number is present in the called party's telephone number list, transmitting the subscriber information inquiry result to the mobile relay switch to attempt the incoming call to the called party's side.

In addition, the process of determining whether the call is spam by attempting to reverse the caller side, attempts to reverse call to the caller by using the outgoing telephone number included in the outgoing call signal from the mobile relay switch when the home location register requests the spam check. Making a step; And checking whether the outgoing call is a spam call by an answering machine by checking whether the mobile relay exchange receives an ANM (Answer Message), which is an ISDN User Part (ISP) message, in response to the reverse outgoing call attempt. It is characterized by.

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

In the present invention, by attempting to make a reverse call using an outgoing telephone number before attempting an incoming call to the subscriber terminal for an outgoing call requested to a subscriber of a spam call blocking service, the calling party terminates the call before the called party answers. Check whether it is a spam call to induce the call subscriber, and if it is confirmed that the spam call through the phone to block the incoming call to the subscriber terminal to provide a spam call blocking service, the system configuration for this is attached to Figure 1 Same as

That is, the spam call blocking service system according to the embodiment of the present invention, as shown in Figure 1, the spam call originator, the originating exchange 10, the mobile relay exchange 20, the home location register 30 and It has a configuration including the destination exchange 40.

Here, the outgoing exchange 10 and the destination exchange 40 means a switch that performs the general outgoing and incoming call processing, hereinafter divided into the calling party and the called party to help understand the description of the spam call blocking service Let's explain.

A spam caller is a communication device that generates a spam call that induces an outgoing call of a subscriber by hanging up before answering and answering randomly. This is a communication device having an answering machine, that is, an answering machine. desirable.

The originating exchange 10 is a general land exchange operated by KT or Dacom for call processing, and is a series of outgoing calls that transmit an outgoing call signal to the mobile relay exchange 20 according to an outgoing attempt of a spam caller. Perform the process.

The mobile relay switch 20 is a CGS (Cell Gateway Gateway Switching) switch that connects the terrestrial exchanger and the mobile communication exchange. When the outgoing call signal is transmitted from the originating exchange 10 which is the ground exchange, the subscriber information is transmitted to the home location register 30. A request is made and an incoming call is attempted to the destination exchange 40, which is a mobile communication exchange in which the incoming call subscriber is located, according to the subscriber location information transmitted as a result of the subscriber information inquiry. In addition, when the home location register 30 requests spam checking, an attempt is made to reverse by using an outgoing telephone number included in an outgoing call signal, and then the spam is analyzed by analyzing an ISUP (ISDN User Part) message for the outgoing call. If it is confirmed that the phone is a spam call, it blocks the incoming call to the incoming call subscriber side to provide a spam call blocking service.

At this time, the mobile relay switch 20 attempts to make a reverse call to the caller who is currently attempting an outgoing call, checks whether an ANM message, which is a kind of ISUP message, is received in response to the corresponding outgoing call attempt, and receives an ANM message. Recognize this as a spam call. That is, when the mobile relay switch 20 attempts to reverse the call to the caller who is currently making the outgoing call, the ANM message is received in response to the reverse call attempt because the ANM message is received only when the caller is an automatic answering device that generates a spam call. If it is received it recognizes the caller as a spam call.

The home location register 30 is a database connected to the mobile communication switch and the mobile relay switch 20 to manage various information of individual mobile communication subscribers, and subscribes to a spam call blocking service for individual mobile communication subscribers for the service of the present invention. It stores and manages information about (or active), and stores and manages the list of unsubscribed phone numbers, the list of call numbers, and the like. When the home location register 30 requests the subscriber information inquiry of the mobile switching center 20, the home location register 30 searches for the corresponding subscriber information and transmits the subscriber information inquiry result. If it is confirmed as a subscriber of the spam call blocking service, the mobile relay switch 20 requests a confirmation of spam for the caller currently attempting to send.

In addition, the home location register 30, if the subscriber who requested the subscriber information inquiry in the mobile switching center 20 is identified as a spam call blocking service subscriber, the list of unsubscribe telephone numbers and / or call telephone numbers for the subscriber (actual Check the list of phone numbers you have called to see if the sender you are trying to send is subject to a spam request. At this time, if the outgoing telephone number received from the mobile relay switch 20 when the subscriber information inquiry request is not present in the rejected phone number list or the telephone number list, it is recognized as a spam check request target and is sent to the mobile relay switch 20. Ask for spam. If the outgoing phone number is present in the unsubscribed phone number list, the mobile switching center 20 blocks the incoming call subscriber by notifying the caller that it is the unsubscribed object, and the outgoing phone number is added to the list of the called phone numbers. If present, the subscriber information inquiry result is transmitted to the mobile relay switch 20.

The destination exchange 40 is a typical MSC operated by a mobile communication operator for call processing, and performs a series of incoming call processing for the incoming telephone terminal according to an incoming attempt of the mobile relay switch 20. .

The operation of the spam call blocking service system based on such a configuration, that is, the spam call blocking service operation according to the embodiment of the present invention will be described in detail with reference to the call processing procedure diagram of FIG. 2 and the flowchart of FIG. 3. same.

First, if a spam caller using an arbitrary answering device attempts to randomly extract or generate a phone number and call the phone number (here, it is assumed that the phone number is the subscriber's phone number of the mobile communication terminal) ( Step S31), the outgoing exchange 10 connected to the spam call originator generates outgoing call signals by performing outgoing call processing according to the outgoing attempt of the spam call originator, and delivers the outgoing call signal to the mobile relay switch 20 (step S32).

In addition, when the mobile relay switch 20 receives the outgoing call signal from the outgoing exchange 10, the called party information (eg, the incoming phone number) and / or the caller information (eg, the outgoing phone number) included in the outgoing call signal are received. Request the subscriber information inquiry to the home location register (30) (step S33).

At this time, the home location register 30 searches for the corresponding subscriber information according to the request of the subscriber information inquiry of the mobile relay switch 20 and transmits the subscriber information inquiry result. The subscriber information is searched using the called party information received from the exchanger 20, and the additional service information of the corresponding subscriber is searched to determine whether the called party (the recipient) is a subscriber of the spam call blocking service (step S34).

If it is determined that the called party is not a subscriber of the spam call blocking service, the general subscriber information inquiry is performed, and the result of the subscriber information inquiry is transmitted to the mobile relay switch 20 (step S35). In an attempt to receive a call through the destination exchange 40 in accordance with the general call processing procedure in the call to the called party is possible. At this time, the destination exchange 40 enables a call with the called party by performing a series of incoming call processing on the called telephone terminal by using the called telephone number transmitted when the incoming call is attempted by the mobile relay switch 20 (step S36). ).

However, when it is determined that the called party is a subscriber of the spam call blocking service, the home location register 30 transmits the subscriber information inquiry result to the mobile relay switch 20 in response to the subscriber information inquiry and simultaneously sends the result to the caller currently attempting to send. A request is made to confirm whether or not a spam has been detected (step S37).

Subsequently, when the mobile relay switch 20 requests spam check for the caller from the home location register 30, the mobile relay switch 20 uses the calling telephone number included in the outgoing call signal received from the calling switch 10 to the caller. By sending an IAM (Initial Address Message) message, an attempt is made to reverse the transmission (step S38). In addition, the sender attempts to reverse the caller to check whether it is spam, and then analyzes the ISUP message for the corresponding call from the station to determine whether it is a spam call. It is checked whether an ANM (Answer Message) message, which is a kind, is received (step S39).

If the ANM message is received after analyzing the response message for the outgoing call, it means that the calling party (that is, the called party for the outgoing call) is an automatic answering device that generates a spam call. Therefore, when the ANM message is received, the mobile relay exchange 20 recognizes the spam call, and thus terminates the outgoing call from the originating exchange 10 and the reverse call generated by the mobile switching center 10 to the called party. A series of spam call blocking services that block incoming calls are provided (step S40).

However, if the ANM message is not received after analyzing the response message for the outgoing call, it is not the answering machine that the calling phone currently attempting to call (that is, the called party for the outgoing call) causes a spam call. Therefore, if the ANM message is not received, the mobile switching center 20 recognizes the call as a regular telephone, thereby ending the outgoing call that is generated by the subscriber and receiving the subscriber information. According to the information, the incoming call is attempted by the destination exchange 40, which is the mobile communication exchange in which the called party is located, thereby enabling the call with the called party. At this time, the destination exchange 40 enables a call with the called party by performing a series of incoming call processing on the called telephone terminal by using the called telephone number transmitted when the incoming call is attempted by the mobile relay switch 20 (step S41). ).

Meanwhile, in the above-described embodiment, when the called party is identified as a spam call blocking service subscriber, the caller unconditionally checks whether the current sender attempts to send spam, but, firstly, after confirming whether the sender who attempts to send currently is the subject of the request for checking the spam, It can also be implemented to request confirmation of spam.

To this end, the home location register 30 receives caller information, that is, an outgoing telephone number, from the corresponding mobile relay switch 20 when the mobile relay switch 20 requests the subscriber information inquiry, and retrieves the subscriber information of the called party. In the transmission of the subscriber information inquiry result, the additional service information of the called party is searched to determine whether the subscriber is a spam call blocking service. By checking the list of numbers and checking whether there is the same phone number as the outgoing phone number received from the mobile relay switch 20, it is checked whether the caller who attempts the current call is a spam check request object.

At this time, if the outgoing telephone number received from the mobile relay switch 20 does not exist in the rejected phone number list or the telephone number list, the sender is recognized as a spam check request target and spammed by the mobile relay switch 20. You will be asked to confirm. However, if the outgoing phone number is present in the unsubscribed phone number list, the call is blocked from being sent to the called party by notifying the mobile relay switch 20 that the sender is a non-spam target to be rejected. If the telephone number is present in the telephone number list, the subscriber information inquiry result is transmitted to the mobile relay switch 20.

By doing so, even if the called party is a subscriber of the spam blocking service, if the caller who attempts to send the current call is not the subject of the request for confirmation of spam, the recipient is not requested to check whether it is spam, and the incoming call is blocked by notifying that the recipient is the recipient, or the subscriber information inquiry result. By sending, it is possible to perform general incoming processing.

In addition, the embodiment according to the present invention is not limited to the above, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art in connection with the present invention.

As described above, the present invention attempts to reverse the outgoing call requested to the incoming call blocking service to check whether the incoming call is a spam call, and thereby terminates the call before the called party responds. It is possible to block spam calls using an answering machine that induces the sending of a message in advance. Accordingly, even when a spam call is generated by disguising an outgoing phone number as a general phone number, it is possible to reliably block spam. It is possible to provide more effective anti-spam services to subscribers.

Claims (8)

It is a system that blocks spam calls originated by spam call senders using answering machines. An outgoing exchange that performs outgoing call processing according to an outgoing attempt of the spam call originator; When the outgoing call signal is transmitted from the outgoing exchange, the subscriber information inquiry is requested, and the incoming call subscriber is attempted to the destination exchange in which the incoming call subscriber is located according to the subscriber location information transmitted as a result of the subscriber information inquiry. A mobile relay exchange which attempts to reverse the caller to the caller side when requested and checks whether the call is a spam call, and provides a spam call blocking service by blocking an incoming call to the called subscriber when the call is detected as a spam call; A database that manages various information of mobile subscribers, and stores and manages information on whether to subscribe (or active) spam call blocking service for individual mobile subscribers, and retrieves subscriber information when requesting subscriber information of the mobile relay switch. The home location register which transmits the result of the subscriber information inquiry, checks whether the called party is a subscriber of the spam call blocking service and, if confirmed as a subscriber of the spam call blocking service, requests the mobile relay exchange to check the spam status of the caller currently attempted to send. Spam call blocking service system comprising a. The method of claim 1, The mobile switching center, when requesting to check the spam status of the home location register, attempts to make a reverse call using an outgoing call number included in an outgoing call signal, and then announces an ANM (ISDN User Part) message for the outgoing call. ANswer Message) Spam call blocking service system, characterized in that whether the outgoing call is a spam call by checking whether a message is received. The method of claim 1, The home location register requests the mobile relay exchange to check whether or not spam is currently being sent to the sender, and thus, a list of unsubscribed telephone numbers and / or calls for the subscriber (recipient) who requested the subscriber information inquiry from the mobile relay exchange. Checking whether the caller's telephone number is present in a list of telephone numbers, and confirming whether the sender is a spam check request object, and when the sender is a spam check request object, requesting the mobile relay exchange to check spam or not; Spam call blocking service system. The method of claim 3, wherein The home location register, if the caller's phone number is present in the called party's unsubscribed phone number list, notifies the mobile relay exchange that the caller is the recipient to be blocked and blocks the incoming call subscriber. If the telephone number of the caller's telephone number list exists in the called party, transmitting the subscriber information inquiry result to the mobile relay switch. Requesting a subscriber information inquiry to a home location register by using the called party information and / or the calling party information included in the outgoing call signal in the outgoing call signal when the outgoing call signal is transmitted from any originating exchange; Requesting the mobile relay exchange to confirm spam for the outgoing call when the home location register searches for subscriber information on the called party who has requested the subscriber information inquiry and is identified as a spam call blocking service subscriber; Confirming whether the call is spam by attempting a reverse call from the mobile switching center to the caller of the outgoing call according to the spam check request; If the outgoing call is determined to be a spam call, terminating the reverse outgoing call, blocking the incoming call to the called party, and providing a spam call blocking service. The method of claim 5, The requesting process for requesting confirmation of spam regarding the outgoing call includes requesting the subscriber information from the mobile relay switch by searching the subscriber information using the called party information received from the mobile relay switch when the subscriber requests the subscriber's information inquiry. Checking whether the subscriber is a subscriber; Performing a subscriber information inquiry when the called party is not a subscriber to a spam call blocking service, and transmitting the subscriber information inquiry result to the mobile relay switch to attempt to receive the called party; If the called party is a subscriber of the spam call blocking service, transmitting the subscriber information inquiry result to the mobile relay switch in response to the request for inquiring the subscriber information, and requesting confirmation of spam regarding the outgoing call. How to block spam call service. The method of claim 5, The process of requesting whether the call is spam or not may be performed by retrieving the caller's unsubscribed phone number list and / or the call phone number list from the home location register when the called party is identified as a spam call blocking service subscriber. Checking whether the same phone number as is present; Recognizing the caller as a spam confirmation request object and requesting a mobile relay exchange to confirm spam if the caller's phone number does not exist in the called party's unsubscribed telephone number list or the telephone number list; If the caller's telephone number is present in the called party's unsubscribed telephone number list, notifying the mobile relay switch that the caller is the subject of rejection and blocking the incoming call subscriber; And transmitting the subscriber information inquiry result to the mobile relay switch when the caller's telephone number exists in the called telephone number list of the called party. The method of claim 5, The process of determining whether the call is spam by attempting reverse call to the caller side comprises: attempting to call back to the caller by using an outgoing call number included in an outgoing call signal at a mobile relay switch when a home location register requests a spam check; Wow; And checking whether the outgoing call is a spam call by an answering machine by checking whether the mobile relay exchange receives an ANM (Answer Message), which is an ISDN User Part (ISP) message, in response to the reverse outgoing call attempt. Spam call blocking service method, characterized in that.

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