USIM卡文件系统中动态存储管理的研究  

USIM Card File System of Dynamic Memory Management

作　　者：马海峰[1] 李代平[1] 尹伟[1] 欧阳小星[1] 李春丰[1] 

机构地区：[1]广东工业大学计算机学院,广东广州510006

出　　处：《计算机技术与发展》2010年第8期71-74,78,共5页Computer Technology and Development

基　　金：广东省广州市自然科技基金项目(2008-GX-015)

摘　　要：为了对智能卡内部有限的存储空间进行有效的分配和管理以适应实际的需求,对USIM卡文件系统中动态存储管理的研究是至关重要的。文中针对NOR Flash具有擦写次数限制、先擦后写的特性和USIM卡中多应用存储空间的分配特点,运用动静结合的理论,设计一种混合存储方式组织数据存储,并给出了存储空间的动态管理方法和具体算法描述。测试结果证实该方法适合3G USIM卡多应用的需求,保证智能卡文件系统的可靠性,提高Flash的利用率,最大化地延长Flash的使用寿命,有效提高数据的检索速度。In order for smart cards within the limited storage space for effective allocation and management to meet the practical needs of the USIM card file system,research of dynamic storage management is essential.In this paper,NOR Flash has a write endurance limit,written after the first cleaning features and USIM card storage space allocation for multi-application features,the use of static and dynamic combination of theory,design a hybrid storage organizing data storage,and gives a dynamic storage management methods and specific description of the algorithm.Test results confirmed that the method is suitable for 3G USIM card multi-application requirements,to ensure the reliability of the smart card file system to improve the utilization of Flash,maximizing the life of the extension of Flash,effectively improve the speed of data retrieval.

关 键 词：USIM卡 动态存储管理 垃圾回收 均衡磨损 

分 类 号：TP36[自动化与计算机技术—计算机系统结构]