Pseudo-Call Routing for Caller ID Verification Across Non-STIR Networks
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Solution Overview
Problem
Existing caller ID spoofing techniques deceive individuals by manipulating caller ID information, and STIR/SHAKEN authentication may fail in cases where international networks or non-compliant service providers are involved, leading to challenges in verifying call authenticity.
Innovation Solution
Implementing a pseudo-call mechanism that uses out-of-band signaling to authenticate calls by setting up a pseudo-call to track call routing criteria, allowing the terminating network to verify the authenticity of the caller ID through a pseudo-call process before establishing an actual call.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If STIR/SHAKEN authentication is implemented, then call authentication reliability is improved, but it cannot be applied to international networks or non-compliant service providers
Solution Approach 1:
The patent introduces a pseudo-call mechanism as an intermediary authentication method. When STIR/SHAKEN cannot be applied (to international networks or non-compliant providers), the system creates a pseudo-call through an out-of-band network that carries authentication information. This pseudo-call acts as a mediator that bridges the gap between networks that don't support direct STIR/SHAKEN authentication, allowing the terminating network to verify call authenticity through alternative means while maintaining compatibility across diverse network environments.
2Adaptability or versatility
If pseudo-call mechanism is implemented, then call authentication coverage is improved for non-STIR/SHAKEN networks, but system complexity increases
Solution Approach 1:
The patent employs preliminary action by establishing the pseudo-call authentication path before the actual call is needed. The out-of-band signaling and pseudo-call setup are performed in advance to pre-validate the caller's identity and establish authentication credentials. This preliminary authentication ensures that when the actual call occurs, the verification process is streamlined, reducing the complexity burden during the actual call handling while maintaining broad authentication coverage.
3Reliability
If out-of-band signaling is used for authentication, then authentication reliability is improved for international calls, but signaling overhead increases
Solution Approach 1:
The patent extracts the authentication signaling from the main call path by using out-of-band signaling. The pseudo-call authentication information is transmitted through a separate signaling channel that is independent of the voice call path. This separation allows authentication data to be transmitted without interfering with the actual call content, reducing the signaling overhead on the primary call path while maintaining reliable authentication for international calls through the dedicated out-of-band channel.
Data Source
AI summary
An example provides performing a pseudo-call operation to obtain call information and sharing the call information prior to placing the actual call, the example may include receiving a call invite message from an out of band network, transmitting a call alert message to a terminating network indicating a time period, a calling number and a called number, receiving a call at the terminating network from another network, determining whether the calling number and the called number match the received calling number and the called number and the call was received within the time period, and pairing call content with the call.