一种高效的轻量级无线传感器网络文件系统设计与实现

Design and realization of an efficient light-weighted file system for wireless sensor networks

传感器节点要存储感知数据、系统配置数据、任务文件等信息,而文件系统可将各类信息以文件形式进行透明的组织管理,并提供统一的用户接口.本文通过改进日志文件结构实现了一种适合资源受限无线传感器节点的轻量级文件系统,利用节点EEPROM存储部分文件信息实现O(1)时间复杂度的文件访问.实验表明,与已有类似文件系统相比,该系统对RAM空间静态占用小(不足150字节),缩短了文件访问时间,并能提供文件目录管理与文件恢复等扩展功能.

Sensor nodes store sensor data, system configuration data, and other information in their local storages. A file system can organize all such information in a document form and provide users with convenient operation interfaces. We design and realize a light-weighted file system for wireless sensor networks（WSNs）, which achieves O （ 1 ） time complexity of file access, small runtime RAM space （ 〈 150 byte） , and shortened file accessing time, and provides rich functions as compared with existing file systems for WSNs.