Implementation of Cooperative Information Storage on Distributed Sensor Boards
Source: Aalborg University
Reliable data retrieval from a sensor network can require a temporal distributed data storage of the measured data among all motes. This is the case when a source of information, or a gateway, is only occasionally present in the network. The authors consider a network consisting of motes that in order to save energy independently of each other go into offline mode, switching their radios off. They propose a cooperative mechanism for data distribution that increases system reliability and at the same time keeps the memory consumption for data storage low on each device. A Reed-Solomon coding scheme is applied as a solution where a certain number of unavailable devices can be tolerated without jeopardizing the system reliability.