Identity-Based Flash Memory Policy Configuration
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Solution Overview
Problem
Flash memory devices face limitations such as the need for erasing entire blocks to rewrite data, unreliable 'bad blocks,' and the requirement for complex housekeeping operations, which existing flash management systems struggle to efficiently address.
Innovation Solution
A system and method for configuring flash memory access behavior using end-user and host-instance identifiers to enforce policies for error correction, wear-leveling, bad-block management, and programming voltage parameters, allowing for tailored flash management operations based on authentication context and user-specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional flash management systems are used, then basic flash operations can be performed, but they cannot efficiently address user-specific requirements and authentication context
Solution Approach 1:
The flash management system is segmented into multiple components: authentication module, policy configuration module, and flash management module. Each component handles specific tasks independently, allowing the system to adapt to different user requirements without increasing overall complexity. The segmentation enables modular policy enforcement based on user identity.
Solution Approach 2:
The system performs preliminary authentication and policy configuration before actual flash operations. User identity is verified in advance, and appropriate policies are pre-configured based on authentication context. This preliminary action allows the flash management to efficiently apply user-specific parameters without complex real-time decision-making during operations.
2Reliability
If identity-based policy configuration is implemented, then flash memory performance and reliability are optimized, but system complexity increases
Solution Approach 1:
The system changes operational parameters such as error correction levels, wear-leveling intensity, and bad-block management strategies based on user identity and authentication context. Different users receive different parameter configurations optimized for their specific needs, improving data reliability without requiring a completely new system architecture.
Solution Approach 2:
An intermediary policy configuration layer is introduced between the authentication module and the flash management module. This intermediary translates user identity into specific flash management parameters, simplifying the overall system design by decoupling authentication logic from flash operation logic while maintaining reliability through standardized parameter enforcement.
3Speed
If conventional flash operations are performed, then basic data storage is achieved, but housekeeping operations reduce access speed
Solution Approach 1:
The system applies partial housekeeping operations based on user-specific policies. Instead of performing complete wear-leveling and garbage collection on all flash blocks, the system selectively applies these operations only to relevant blocks based on user identity and access patterns. This reduces the time lost to housekeeping operations while maintaining data access speed for active user data.
Data Source
AI summary
Methods, apparatus, and computer code for effecting flash policy configuration operations in accordance with an end-user identifier and/or a host-instance identifier are disclosed herein. Exemplary flash policy configuration operations include (i) configuring a flash error-correction policy, (ii) configuring a flash-management table storage policy; (iii) configuring a wear-leveling policy; (iv) configuring a bad-block management policy and (v) configuring a flash-programming voltage parameter. Exemplary end-user identifiers include but are not limited to email account identifiers, logon user names, and International Mobile Subscriber Identities (IMSI). Exemplary host-instance identifiers may include but are not limited to International Mobile EQUIPMENT Identifiers (IMEI). Optionally, the flash policy configuration is contingent on authentication context data—for example, strength of the authentication (e.g. login/password vs. smartcard authentication or biometric authentication), date of the authentication, and identity provider information.