Session Border Controller Selective Wi-Fi Call Restriction
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Solution Overview
Problem
Current technologies lack the ability to selectively restrict Wi-Fi calls based on geographical locations or other features associated with the calls, leading to potential security risks and unauthorized access to communication services.
Innovation Solution
The implementation of a session border controller (SBC) coupled with an IP multimedia core subsystem (IMS) of a wireless network, which determines whether a subscriber is authorized to make Wi-Fi calls by comparing their subscriber profile with their current location, thereby enabling or blocking the calls accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Wi-Fi calls are allowed indiscriminately for all users and locations, then ease of operation and service availability are improved, but security risks and unauthorized access increase
Solution Approach 1:
The patent implements location-specific authorization by comparing the current geographical location of the wireless device with authorized geographic areas stored in the subscriber profile. This allows the system to provide differentiated access control - allowing Wi-Fi calls in authorized locations while blocking them in unauthorized locations, thereby resolving the contradiction between service availability and security.
Solution Approach 2:
The session border controller acts as an intermediary between the wireless device and the Wi-Fi network. It intercepts Wi-Fi call requests, retrieves subscriber profiles, compares locations, and makes authorization decisions. This intermediary mechanism enables selective restriction of Wi-Fi calls based on geographical location without affecting the overall ease of operation for authorized users.
2Reliability
If geographical location verification is implemented for Wi-Fi calls, then security and unauthorized access control are improved, but device complexity and processing requirements increase
Solution Approach 1:
The system retrieves subscriber profiles containing authorized geographic areas automatically from a database when a Wi-Fi call request is received. The session border controller performs the location comparison using information already available in the subscriber profile, without requiring manual configuration or complex external verification systems. This self-service approach enhances authorization control while minimizing additional system complexity.
3Object-affected harmful factors
If Wi-Fi calls are blocked from unauthorized locations, then security risks are reduced, but service accessibility and user convenience deteriorate
Solution Approach 1:
The system dynamically evaluates each Wi-Fi call request by comparing the current location with authorized geographic areas in real-time. This dynamic authorization approach allows the service to be accessible wherever the user is located within authorized areas, while automatically blocking access from unauthorized locations. This resolves the contradiction by making service accessibility conditional rather than static, preventing fraud while maintaining convenience for legitimate users.
Data Source
AI summary
A system includes a session border controller (SBC) coupled to an internet protocol (IP) multimedia core subsystem (IMS) of a telecommunications network. The SBC obtains information indicative of a roaming profile of a particular subscriber associated with the telecommunications network. The roaming profile indicates geographic areas in which the particular subscriber is authorized to access a communications service. The SBC receives a request to connect a particular voice call over a Wi-Fi network from a wireless device on the telecommunications network. The wireless device is associated with the particular subscriber to the telecommunications network. The SBC identifies a current location of the wireless device and compares the current location of the wireless device with geographic areas in which the particular subscriber is authorized to access the communications service. The SBC can then enable or deny the IMS to establish a session for the particular voice call over the Wi-Fi network.