Femto Access Point Device Authorization Policy
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Solution Overview
Problem
In wireless communication networks, femtocell access points face challenges in managing access control and service continuity, particularly with unauthorized devices attempting to camp on private access points, leading to battery drain and excessive messaging traffic, and existing solutions may not adequately differentiate between authorized and unauthorized devices for emergency calls.
Innovation Solution
An access point detects device identifiers and matches them with personal policy profiles containing rules for application access and usage, deactivating rules when devices are not present, and applying different sets of rules based on device authorization, ensuring only authorized devices access services and manage application availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access point allows all devices to camp on the private access point, then service continuity is improved, but battery drain and excessive messaging traffic increase
Solution Approach 1:
The patent applies different access control policies to different devices based on their authorization status. Authorized devices receive full service continuity including emergency calls, while unauthorized devices are restricted. This local differentiation resolves the contradiction by providing service continuity only where needed (authorized devices) without incurring the energy cost of supporting all devices.
Solution Approach 2:
The access control mechanism segments devices into authorized and unauthorized categories, applying different rule sets to each segment. This segmentation allows the system to maintain service continuity for authorized devices while preventing battery drain and excessive messaging from unauthorized devices, thus resolving the technical contradiction.
2Loss of energy
If the access point restricts access to authorized devices only, then battery drain and messaging traffic are reduced, but service continuity for emergency calls may be compromised
Solution Approach 1:
The patent implements differentiated access control where emergency call functionality is granted as a special local quality to all devices regardless of authorization status, while other services remain restricted to authorized devices only. This resolves the contradiction by allowing emergency service continuity without compromising energy efficiency for non-emergency operations.
3Measurement precision
If the access point applies complex access control rules, then device authorization is improved, but device complexity increases
Solution Approach 1:
The patent employs pre-configured personal policy profiles that contain authorization rules and device identifiers. The access point performs preliminary matching of device identifiers against these pre-stored profiles, which simplifies the authorization process while maintaining precision. This preliminary action approach resolves the contradiction by enabling accurate device authorization without requiring complex real-time decision logic.
Data Source
AI summary
An access point detects a presence of a first device having a device identifier in a femtozone associated with the access point. The access point matches the device identifier with a first personal policy server identifier associated with a corresponding first personal policy profile comprising a first set of rules and retrieves the first personal policy profile corresponding to the first personal policy server identifier. The access point applies the first set of rules in the first personal policy profile.