Cross-Network Call Identifying Function for Interconnect Bypass Fraud Detection
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Solution Overview
Problem
Current methods for detecting international call interconnect bypass fraud are inadequate, as they fail to accurately identify the extent of fraud and the involved transit operator, due to limitations in rule-based detection and the high costs and inflexibility of test call generation platforms, allowing fraudsters to evade detection by changing call patterns and disguising their activities.
Innovation Solution
A cross-network call identifying function (CNCIF) that accesses call detail records from both originating and terminating networks to verify the legitimacy of international calls by matching time information and call types, automatically identifying instances of interconnect bypass fraud and blacklisting fraudulent transit operators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rule-based fraud detection techniques are used to analyze call behavior, then detection can be performed with existing infrastructure, but fraudsters can easily evade detection by changing call patterns and the technique cannot reliably identify the extent of fraud or the involved transit operator
Solution Approach 1:
The patent segments the fraud detection process into multiple independent verification steps: (1) verifying caller-callee relationship through CDR matching, (2) validating call routing paths, (3) checking time information consistency, and (4) identifying transit operators. This segmentation allows each aspect to be verified independently, preventing fraudsters from evading detection by altering single call patterns.
Solution Approach 2:
The patent introduces an intermediary verification mechanism that compares CDR data from multiple sources (originating network, terminating network, and transit operators) to validate call legitimacy. This intermediary cross-verification process identifies discrepancies that rule-based techniques miss, enabling accurate identification of both fraud extent and involved transit operators.
2Measurement precision
If test call generation platforms are used to detect interconnect bypass fraud, then routing verification can be performed, but the cost is prohibitive and the platforms are inflexible, allowing fraudsters to distinguish test calls from actual calls and route them properly to avoid detection
Solution Approach 1:
The patent enables the terminating network operator to perform self-verification of call routing using their own CDR data and existing network infrastructure. By analyzing incoming call records and comparing them with expected routing patterns, the operator can identify bypass fraud without external test call platforms, eliminating the associated costs and flexibility limitations.
Solution Approach 2:
The patent creates a universal detection method that works across different networks and fraud scenarios using existing CDR data. The verification process can identify various types of interconnect bypass fraud (SIMbox, compromised PBX, etc.) without requiring network-specific test platforms, providing both cost-effectiveness and adaptability to evolving fraud techniques.
3Loss of information
If the terminating network operator analyzes its call detail records to identify revenue discrepancies, then fraud detection can be performed using available data, but the operator cannot accurately measure the extent of diverted traffic or identify the transit operator committing fraud
Solution Approach 1:
The patent implements a feedback mechanism where CDR data from the terminating network is continuously analyzed and compared with expected call patterns. When discrepancies are detected (such as incoming calls recorded as local instead of international), the system generates feedback that identifies the specific transit operator responsible and calculates the extent of revenue loss, enabling precise measurement and accountability.
Data Source
AI summary
A cross-network call identifying function for identifying instances of international call interconnect bypass telecommunications fraud. The cross-network call identifying function access call detail records of both the terminating network and the originating network. The cross-network call identifying function identifies an outgoing international phone call from a caller within the originating network to a callee within the terminating network. The call detail records of the terminating network are querried for an incoming call with a matching callee call identifier. Time information of the outgoing call and the incoming call are compared to determine whether there is a match. If the callee call identifiers and time information match, but the incoming phone call is recorded as a local call, then the incoming call is identified as an instance of international call interconnect bypass fraud.