Call State Service for VOIP Impersonation Validation
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Solution Overview
Problem
Wireless communication networks face challenges in distinguishing legitimate communications from impersonated communications, leading to resource wastage on processing illegitimate calls, particularly with the rise of VOIP solutions that mimic real user communications.
Innovation Solution
A method is introduced to manage call state information through a call state service that caches and verifies communication data, using data structures to identify legitimate calls by matching call state information, and if a match is found, it returns a notification to the contact service, thereby validating the communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If end services process all incoming communications without verification, then all communications are serviced, but resources are wasted on impersonated communications
Solution Approach 1:
The system performs preliminary verification of incoming communications by checking call state information against cached data before processing. The call state service pre-validates communications by comparing call state requests with stored call state information, identifying legitimate calls in advance. This preliminary action filters out impersonated communications before they consume service resources, resolving the contradiction between servicing all communications and avoiding resource waste.
2Reliability
If call state information is verified for every communication, then legitimate communications are identified, but processing time increases
Solution Approach 1:
The system applies partial verification by checking only essential call state parameters (calling party number, called party number, call time) against cached information. Rather than performing exhaustive verification of all communication attributes, the system checks the minimum necessary data to identify legitimate calls. This partial action maintains high verification accuracy while minimizing processing time overhead.
Solution Approach 2:
The call state service applies verification selectively to specific call state parameters rather than all communication data. The system focuses verification on critical identifying information (caller ID, callee ID, timestamp) while ignoring less relevant communication details. This localized verification approach maintains reliability for identifying legitimate calls while reducing overall processing time.
3Adaptability or versatility
If VOIP impersonation is allowed, then communication freedom is maintained, but end services receive illegitimate calls
Solution Approach 1:
The call state service acts as an intermediary between VOIP communications and end services. It receives call state requests from end services, verifies them against cached call state information, and returns validation results. This intermediary layer maintains communication freedom by allowing VOIP calls to proceed while filtering out impersonated communications through verification, thus protecting end services from impersonation harm without restricting legitimate communication methods.
Data Source
AI summary
Examples disclosed herein provide systems, methods, and software to validate calls to end telephone numbers. In one implementation, a method of operating a call state service includes obtaining and storing call state information for one or more communication in at least one data structure. The method further provides receiving a call state request for a communication of interest, wherein the request includes relevant call state information. The method also provides determining whether the relevant call state information matches a communication in the one or more communications based on the at least one data structure, and, if a match is identified, returning a call state match notification to the requesting end service.