Memory Card Controller Authorization Logic
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Solution Overview
Problem
Mobile Network Operators (MNOs) face challenges in limiting the usage of memory cards to a single network, as existing techniques rely on SIM lock mechanisms, which are inadequate when service providers cover the cost of memory cards and preloaded data, necessitating a method to control memory card access based on authorization.
Innovation Solution
A memory card with a controller that operates conditionally on authorization from a corresponding secure identity card, such as a SIM or RUIM card, allowing service providers to limit access to storage, granting read, write, or both access types, and enabling unlocking via any network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a SIM lock mechanism is used to limit mobile phone usage to a single MNO network, then network restriction is achieved, but memory card usage cannot be effectively controlled
Solution Approach 1:
The invention segments the control mechanism by introducing a separate authorization system for memory cards that operates independently from the SIM card. The controller in the memory card checks for authorization from a corresponding identity card, creating a distinct layer of control that can be tailored specifically to memory card usage patterns and pricing models.
Solution Approach 2:
The invention introduces an intermediary authorization mechanism where the controller in the memory card mediates between the SIM card's network restriction and the user's access to storage. This intermediary layer verifies authorization independently, allowing the system to maintain network restrictions while simultaneously enabling or disabling memory card functionality based on separate authorization criteria.
2Productivity
If memory cards are offered at low cost or free with preloaded data to motivate usage, then sales increase, but control over memory card usage is reduced
Solution Approach 1:
The invention implements dynamic control where the memory card's functionality is not fixed but can be adjusted based on authorization status. The controller can dynamically enable or disable read, write, or both functionalities based on whether valid authorization is present, allowing service providers to offer cards at different price points with corresponding control levels.
Solution Approach 2:
The invention changes the operational parameters of the memory card based on authorization. The controller modifies access parameters (read-only, read-write, or completely locked) depending on the authorization status, enabling service providers to offer flexible pricing models where full functionality requires authorization while basic functionality remains available.
3Reliability
If access to memory card storage is locked to prevent unauthorized usage, then network restriction is improved, but ease of operation deteriorates
Solution Approach 1:
The invention implements a self-service authorization system where the memory card automatically checks for authorization from a corresponding identity card without requiring manual intervention. The controller handles the authorization verification process autonomously, maintaining network restrictions while preserving ease of operation for authorized users who simply need to have the authorized identity card present.
Data Source
AI summary
A memory card includes a memory for storing data and a controller that is operative to control access to storage of at least a portion of storage conditional upon an authorization of a corresponding identity card of a service provider. A storage system includes an identity card of a service provider and a memory card, wherein the identity card corresponds to the memory card, and wherein access to storage of at least a portion of the memory card is controlled conditional upon an authorization from only this corresponding identity card. A method of doing business includes equipping a mobile phone with an identity card that corresponds to a memory card, configuring the memory card to operate conditional on an authorization from this corresponding secured card, and then offering the mobile phone and the memory card for sale at a discount.