TR201619005A2 - A SYSTEM AND METHOD FOR DETERMINING CALL TRANSMISSION FRAMING IN MOBILE COMMUNICATION NETWORKS - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention relates to a system and method for detecting call frauds (frauds) connected to a dialed subscriber by carrying out a domestic call and carrying the call via VoIP to a SIM Box system with a SIM card inserted in a SIM card registered to a domestic operator while performing call setup between international GSM operators. . The system (1) of the present invention; database (2), HLR (3), call initiation module (4), call reception module (5), MSC (6), international carrier (7) and SIM Box detection unit (8).

Description

DESCRIPTION CALL HANDLING IN MOBILE COMMUNICATION NETWORKS A FRAUD TO DETECT SYSTEM AND METHOD Technical Area This invention is based on the international GSM (Global System for Mobile Comunications) Call setup between operators (Global System for Communication) while making the call, a SIM card registered with a domestic operator is inserted. VoIP (Voice over Internet Protocol 7 Internet Protocol) to SIM Box system by carrying it to the domestic call via Audio Transfer) a system that detects scams (fraud) connected to the subscriber, and relates to the method. Prior Art GSM operators using their own infrastructure for domestic calls or service fee due to mutual agreements with other operators, significantly lower than international searches. This service fee serving in different countries depending on the increasing number of operators as well as the difference difficulty of payment protocols between operators, causes third parties or institutions to step in. This situation, It gives an opportunity to individuals or institutions that want to take advantage of the opening in the system.

Today, the commonly known SIM Box (Subscriber Identity Module Box - between operators with the use of devices such as the Subscriber Identity Module Box). such as domestic calls, incoming calls from abroad by diverting calls is shown. In this case, the payment to be made to the operator receiving the call, The referral is made to the third parties or institutions in between. This situation, which is especially common in international calls, It causes an informal flow of money and causes tax losses.

In addition to this, the loss of revenue for the operators, the service of the network reflected on the customer decrease in quality and considering that this decrease is due to the network. It can also cause unnecessary infrastructure investments. Because of these reasons operators can detect and detect fraud through this type of illegal call transport. They make great efforts to prevent it.

In the common usage in the state of the art, the desired network SIM purchased from the operator to scam calls To determine (Subscriber Identity Module) cards Test calls are made to numbers registered with the operator. Special test SIM In these calls made using CLI (Calling Line ldentity - In case the Caller Line Identity) code is not ported to the dialed number The number is monitored on suspicion of fraud. In these uses, the SIM Box fraudsters detect test calls and are taking action against the situation.

In the state of the art, there are methods such as test search. However, this Since these methods cannot provide a wide-ranging follow-up and prevention mechanism, they are insufficient in detecting call transport fraud.

The ongoing revenue losses of telecommunications operators have contributed to this situation. summarizes. For this reason, call transport scams such as SIM Box are huge. The necessity of a system that detects the ratio is obvious. In the patent document, it is stated that the number dialed before the test call is started. call transport with the configuration of the identifier information on from a system and method that enables fraud detection is mentioned. In the document, you can start a test call at regular intervals to the numbers of the network and call stone fraud detection by tracking the location information of the number A system and method that performs it is mentioned.

Brief Description of the Invention The purpose of this invention is to monitor network signals in international calls. Detection of frauds made via call transport (SIM Box etc.) is to implement a system and method that provides

Detailed Description of the Invention In order to achieve the purpose of this invention, “Mobile Communication Networks” A System That Detects Call Carrying Fraud and Method” is shown in the attached figures, of which; Figure-1 is the sematic block diagram of the system that is the subject of the invention.

Figure-2 is the flow diagram of the method that is the subject of the invention.

The parts in the figures are numbered one by one. the responses are given below. 1. System Database HLR (Home Location Register 7 Central Location Register) call initiation module call reception module MSC (Mobile Switching Center) 7. International carrier 8. SIM Box detection unit 100. Method Invention topic detecting call transport fraud in international calls - Called and dialed numbers are recorded to start a test call. at least one database (2), - at least one HLR (3) containing mobile number information registered to the network, - from the caller number contained in the database (2) to the dialed number Call able to initiate a call through a contracted international operator start module (4), - at least one call forwarded to the dialed number welcome module (5), - calls initiated on the network and calls received on the network - Receives and forwards international calls contracted with the mobile operator at least one international carrier (7), - located on the HLR (3) of the dialed number obtained from the database (2) T-CSI (Terminating CAMEL Subscriber InfoOmiation - Termination CAMEL Subscriber Information) and MSC (6) call the call. updates it to provide direction to the welcome module (5), caller and updated dialed number to call initiation module (4) the caller of the incoming call to the call greeting module (5), which transmits the the caller, which receives the number information and forwards it to the call initiation module (4). at least one SIM Box detection unit (8) that compares it with the number information contains. ( Figure 1) The database (2) in the inventive system (1), the caller whose test call is initiated, and It is the unit where the dialed numbers are kept under record. Database (2), SIM Box that the fraud number detected by the detection unit (8) is also recorded. The HLR (3) in the system (1), which is the subject of the invention, is sent to all subscribers of the communication network. definition, location on the basis of the network, service usage parameters, etc. It is the unit where subscription information is kept.

The call initiation module (4) in the system (1), which is the subject of the invention, detects the SIM Box. the caller and the dialed number information from which the test call will be initiated from the unit (8) takes. Call initiation module (4) with received caller and dialed number information, From a caller to a dialed number through an internationally contracted operator it initiates the right call. Initiating a call in the preferred embodiment of the invention module (4), call initiation SIP (Session Initiation Protocol - Session Initiation Protocol) It is performed using the Initialization Protocol.

Call response module (5) in the inventive system (1), test call It is the unit that answers the calls forwarded to the dialed number. Call greeting module (5), in case of forwarding a call to the dialed number transmits the number information to the SIM Box detection unit (8). Invention preferred call reception module (5), CAMEL (Customized Applications for Mobile Enhanced Logic - Customizable for Mobile Enhanced Logic It is a unit that works in conjunction with Applications.

MSC (6) in the system (1), which is the subject of the invention, which enables calls to be forwarded to in-net or out-of-net subscribers. is the unit. MSC (6) receives calls from international carrier (7) and It directs according to the dialed number information. Invention preferred application, MSC (6), HLR (3) of the dialed number from which the test call is made T-CSI updated by SIM Box detection unit (8) located on defines the call to forward the call to the call greeting module (5) according to its information contains.

The international carrier (7) in the system (1), which is the subject of the invention, It is the receiving and guiding unit. International carrier (7), call initiation by the contracted foreign mobile operator initiated by module (4) forwards the forwarded call to the MSC (6). Call transport scam, international The call directed by the carrier (7) is not directed to the MSC (6) but to another by reaching the dialed number via the server (SIM Box) is carried out.

The SIM Box detection unit (8) in the inventive system (1), in the database (2) Called and dialed numbers for the test call from the numbers on the determines. SIM Box detection unit (8), I-ILR (3) of the dialed number records the T-CSI information and sends an up-to-date T-CSI to the dialed number. It assigns CSI information. For the T-CSI value used, the MSCI definitions, call reception by MSC of incoming calls to the dialed number module (5). SIM Box detection unit (8), caller and transmits the current dialed number information to the call initiation module (4).

The SIM Box detection unit (8) is initiated by the call initiation module (4). Call reception with T-CSI information that the call assigns to the dialed number module (5) is waiting for it to be redirected. Call pickup of the call call reception module (5), sends the caller number information of the forwarded call to the SIM Box identification unit (8) transmits.

The SIM Box detection unit (8) is the routed signal transmitted by the call greeting module (5). The caller transmits the caller number information of the call to the call initiation module (4). compares with the number information. If two numbers are the same as a result of comparison The SIM Box detection unit (8) decides that there is no call transport scam. gives. If the two numbers are not the same as a result of the comparison, the SIM Box is detected. unit (8), the caller of the call forwarded to the call greeting module (5) determines that the number is forwarded and the call reception unit (5) conveys the caller number information to the database as a fraud (SIM Box) number. (2) records it by transmitting. Next, the SIM Box detection unit (8), HLRlye (3) by querying the T-CSI information of the dialed number with its previous value. is changing.

Thanks to the system (1), which is the subject of the invention, there is a difference between international mobile operators. In outgoing calls, the call is made to a number registered to the domestic network. call transport, which enables it to be made as a domestic call by directing fraud detection is provided.

Enables the detection of call transport fraud in international calls the inventive SIM Box fraud detection method (100); - For test call from database (2) by SIM Box detection unit (8) Receiving caller and dialed number information (101), - HLR (3rd) of the number dialed by the SIM Box identification unit (8). getting their registration (102), - T-CSI of the number dialed by the SIM Box identification unit (8) recording information and assigning a new T-CSI to the dialed number (103), - Caller and current dialed information by SIM Box detection unit (8) forwarding (104) to the call initiation module (4), - over the international network agreed by the call initiation module (4) initiating a call from the calling number to the dialed number (105), - the call initiated by the international carrier (7) to MSC7 (6) directing (106), - T-CSl information assigned by the SIM Box detection unit (8) by the MSC (6) Detection of the call initiated to the dialed number and routing to the welcome module (5) (107), - the caller of the call directed by the call greeting module (5) transmitting the number information to the SIM Box detection unit (8) (108), - by the SIM Box detection unit (8) to the call initiation module (4) caller number sent and transmitted by the call greeting module (5) comparison of information (109), - if it is determined that the calling numbers are not the same as a result of the comparison, transmitted by the SIM Box detection unit (8) by the call reception unit (5). caller number information as fraud (SIM Box) number to be determined and recorded in the database (2) (1 10), - By starting a query to the HLR (3) by the SIM Box detection unit (8) restoring the T-CSI information of the dialed number to its original state and termination (1 1 1).

Thanks to the call transport fraud method (100), which is the subject of the invention, the international In calls made between mobile operators, the call is made to the domestic network. to be made as a domestic call by directing it to a registered number. It is provided to detect the call forwarding fraud that provides.

Various applications of the inventive system (1) and method (100) development is possible and the invention cannot be limited to the examples described herein. basically as stated in the requests.

Called and dialed for test call from database (2) by routing detection unit (8) obtaining number information Receiving the HLR (3) records of the number dialed by the routing detection unit (8) Recording the T-CSl information of the number dialed by the routing detection unit (8) and assigning a new T-CSI to the dialed number Call initiation of caller and current dialed information by the routing detection unit (8) to the inodule (4) From the caller's number over the international network agreed by the call initiation module (4) initiating a call to the dialed number Redirecting the call initiated by the international carrier (7) to MSCl (6) Called caller with T-CSI information assigned by the routing detection unit (8) by the MSC (6) detecting the call initiated to the number and routing it to the call reception module (5) The caller nuinara information of the call directed by the call greeting module (5) forwarding it to the orientation detection unit (8) Calling numbers Steering detection unit (8) by the call reception unit 110 (Si is the caller number information transmitted by scam (SIM Box) number identification and database (2) to be registered orientation detection unit (8) j (3) query to the HLR by T- The initial state of CSI knowledge turning over

Claims (3)

REQUESTS 1. It enables the detection of call transport fraud in international calls; Call initiation module that can initiate a call from the caller number to the dialed number in an HLR (3) database containing at least one database (2) that records the caller and the dialed numbers to initiate the test call, over the contracted international operator. (4), at least one call reception module (5) to which the incoming call to the dialed number is forwarded, at least one international carrier (7) that receives and forwards the international calls that are initiated on the network and incoming calls with the mobile operator, and from the database (2 ) receives the T-CSI information on the HLR (3) of the dialed number it receives and updates it to enable MSC (6) to forward the call to the call reception module (5), transmits the caller and updated dialed number information to the call initiation module (4), It receives the caller number information of the incoming call to the greeting module (5) and transmits the caller number information to the call initiation module (4). a system (1) characterized by at least one SIM Box detection unit (8), which is simplified. 2. A system as in Request 1, which is characterized by the call initiation module (4) that performs the initiation process from the caller to the dialed number using SIP. 3. A system like the one in the Request, which is characterized by the MSC (6) that forwards the call to the call reception module (5) according to the T-CSI information on the HLR (3) of the dialed number from which the test call is made and updated by the SIM Box detection unit (8). one). . Fraud of the caller number information transmitted by the call answering unit (5), which determines that the caller number of the call forwarded to the call answering module (5) is forwarded in case the caller number information transmitted to the call initiation module (4) and received from the call answering module (5) are not the same (SIM Box) A system (1) as in Istein 19, characterized by the SIM Box detection unit (8), which transmits its number to the database (2). . Isteiii, which is characterized by the SIM Box detection unit (8), which takes the T-CSI information of the dialed number to its previous value by querying the HLR (3) after performing the comparison of the caller number information transmitted to the call initiation module (4) and received from the call greeting module (5). A . like in ls . It enables the detection of call transport fraud in international calls; - Receiving the caller and dialed number information for test call from the database (2) by the SIM Box identification unit (8), - Retrieval of the HLR (3) records of the number dialed by the SIM Box identification unit (8) (102), - Saving the T-CSI information of the dialed number by the SIM Box identification unit (8) and assigning a new T-CSI to the dialed number (103) forwarding (104), - initiating a call from the calling number to the dialed number over the international network contracted by the call initiation module (4) (105), - forwarding the call initiated by the international carrier (7) to the MSC (6) (106), - MSC ( 6) to detect the call initiated to the dialed number with T-CSI information assigned by the SIM Box identification unit (8) and forwarding it to the call answering module (5) (107), - caller number information of the call directed by the call answering module (5) Transmitting to the Box identification unit (8) (108), - Comparing the caller number information sent by the SIM Box identification unit (8) to the call initiation module (4) and transmitted by the call reception module (5) (109), - Comparing the same number of calling numbers as a result of the comparison. If it is detected that it is not detected, the SIM Box detection unit (8) determines the caller number information transmitted by the call reception unit (5) as a fraud (SIM Box) number and records it in the database (2) (l 10), - SIM Box detection unit (8 A call fraud detection method (100) characterized by the steps of initializing the T-CSI information of the dialed number by initiating a query to the HLR (3) by ) and terminating the transaction (1 1 1).