Wireless Nuisance Call Detection Through Roaming Status Validation

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Solution Overview

Problem

Existing communication networks lack reliable methods to detect and block spoofed phone numbers from off-network sources, particularly in cases where the originating carrier cannot verify the legitimacy of incoming calls, leading to a high incidence of nuisance traffic events.

Innovation Solution

Implementing a system where wireless carriers share real-time roaming status information among themselves, either through a third-party service or directly, to validate the legitimacy of incoming calls by comparing the registered status of the caller's device across networks, with optional subscriber consent and privacy protections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If carriers share real-time roaming status information through a third-party service or directly, then the ability to detect and block spoofed calls is improved, but the system complexity and privacy protection requirements increase

Engineering Contradiction:

Improvedetection accuracyVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a third-party service as an intermediary to facilitate information sharing between wireless carriers. This mediator receives roaming status information from participating carriers and provides verification services to detecting carriers, thereby improving detection accuracy while managing system complexity through a centralized coordination point rather than requiring direct peer-to-peer connections between all carriers

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The third-party service is designed to serve multiple functions: collecting roaming status information from participating carriers, storing it in a database, verifying incoming call legitimacy, and providing responses to detecting carriers. This multi-functional approach consolidates what would otherwise require separate systems at each carrier, reducing overall system complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If carriers implement presence analysis to verify caller legitimacy, then the ability to block nuisance traffic events is improved, but the loss of information regarding subscriber privacy increases

Engineering Contradiction:

Improvedetection accuracyVSAvoidsubscriber privacy

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent implements differential privacy protection where the level of information sharing varies by context and participant. Participating carriers share roaming status information with the third-party service, but the service only provides verification results (valid/invalid) to detecting carriers without revealing specific subscriber details. This local quality approach allows necessary information flow for detection while protecting subscriber privacy

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent converts the potential harm of privacy loss into a benefit by implementing privacy protection mechanisms that allow detection to proceed effectively. The third-party service aggregates and anonymizes roaming status data, transforming detailed subscriber information into generalized verification results that maintain detection accuracy while protecting individual subscriber privacy

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If carriers process and analyze roaming status information in real-time, then the productivity of detecting and blocking nuisance calls is improved, but the use of energy and computational resources increases

Engineering Contradiction:

Improvedetection speedVSAvoidcomputational resource consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent implements preliminary action by having participating carriers pre-register their roaming status information with the third-party service before it is needed for verification. The third-party service maintains an updated database of current roaming statuses, so when a detecting carrier needs verification, the information is already prepared and available for immediate comparison, enabling fast detection without real-time computational overhead

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts the computationally intensive tasks of information collection, storage, and preliminary verification from individual carriers and centralizes them in the third-party service. This allows detecting carriers to perform only simple lookup operations against the third-party service's pre-processed data, significantly reducing their energy consumption while maintaining high detection speed

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12464071B2Method and apparatus for detecting nuisance traffic events based on network

Publication Date: 2025.11.04 AT&T INTELLECTUAL PROPERTY I L P

AI summary

A processing system may determine a nuisance traffic event. The processing system may receive from a first entity a request to determine a status of the wireless user endpoint device associated with a wireless phone number, wherein the status comprises a determination as to a validity of a subject communication associated with the wireless phone number, perform a presence analysis of the wireless user endpoint device, and respond to the request by providing an indication as to the validity of the subject communication associated with the wireless phone number back to the first entity.