Smart Card Dual Memory Indexing for Fast Data Access
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Solution Overview
Problem
Conventional smart cards with nonvolatile memory have limited storage capacity and slow data access speed, making it difficult to manage and store high-capacity information such as directories and messages efficiently.
Innovation Solution
A smart card with a high-capacity memory for storing information and a high-speed memory for indexing, allowing for fast data access by transmitting only the relevant information based on selected index information, improving data access speed without decreasing storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If nonvolatile memory is used in smart cards, then data storage capacity is limited, but data access speed is slow
Solution Approach 1:
The patent divides the memory system into two separate memory units: a first memory unit for storing index information and a second memory unit for storing actual data. This segmentation allows each memory unit to be optimized for its specific function, with the first memory unit providing fast access to indices and the second memory unit providing large storage capacity, thereby resolving the contradiction between storage capacity and data access speed.
2Quantity of substance
If high-capacity memory is used to store large datasets, then storage capacity increases, but data access speed decreases
Solution Approach 1:
The patent implements preliminary action by pre-storing index information in the first memory unit that points to the locations of actual data in the second memory unit. When data needs to be retrieved, the system first accesses the pre-organized index information to quickly locate the required data, significantly reducing data retrieval time while maintaining high storage capacity in the second memory unit.
3Device complexity
If conventional memory architecture is used, then device complexity is low, but information management efficiency is poor
Solution Approach 1:
The patent introduces an intermediary mechanism through the first memory unit that stores index information. This intermediary layer mediates between the user/request and the large-capacity second memory unit, enabling efficient information management by first consulting the index to locate required data before accessing the main storage, thereby improving information management efficiency while maintaining relatively simple device complexity.
Data Source
AI summary
Managing data of a smart card that includes a high-capacity memory and a high-speed memory. The high-capacity memory stores information and the high-speed memory stores an index to the information, and hence high-speed access to the high-capacity memory may be provided by referencing the index.