File System Support for Adjustable Resolution Applications in Sensor Networks

Flash memory is often the technology of choice for sensor networks because of its cost-effectiveness and attractive energy properties. In storage-constrained sensor network applications, the monitored data is typically stored in multi-resolution fashion. This allows reclamation of some storage space when needed by reducing the quality of stored data by eliminating some of the precision. Existing sensor network file systems are optimized for sequential logging of the data. However, flash memories have a number of unique properties that require careful consideration in file system design. In this paper, we show that in applications where adjustable resolution occurs, sequential logging file-systems result in an inefficient implementation of adjustable resolution. We propose an alternative implementation of the file system where data components are grouped with each other according to resolution. Thus, reducing resolution is implemented by simply erasing the pages with the excess re...

• Type: Conference
• Year: 2006
• Where: ADHOCNOW
• Authors: Vikram P. Munishwar, Sameer Tilak, Nael B. Abu-Ghazaleh
• Keywords: ADHOCNOW 2006, Adjustable Resolution, Sensor Network, Sequential Logging, Wireless Networks