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ZeDDS -- Fault-Tolerant Data Management in Wireless Sensor Networks with Mobile Users

Authors:
Jens Kamenik
Christoph Peuser
Volker Gollücke
Daniel Lorenz
Roland Piechocki
Merlin Wasmann
Oliver Theel

Keywords: wireless sensor networks; distributed data storage; data replication

Abstract:
Ubiquitous wireless sensor networks (WSNs) consist of sensor nodes which may communicate with each other via unreliable communication links. Furthermore, the sensor nodes themselves may fail. Ubiquitous WSNs may be used in application scenarios where they autonomously monitor the environment and are only sporadically visited by the mobile user for harvesting the collected sensor data. Thus, high availability of the measured data is of paramount priority. But how can the mobile user formulate this QoS requirement and how can a WSN - honoring such a QoS requirement - be efficiently implemented? We propose ZeDDS (ZeDDs is the German acronym for "Dependable & energy-efficient data management in WSNs") a middleware and control framework for providing high available data storage in WSNs. In ZeDDS, we assume that the WSN is meant for collecting and dependably storing measured data until the mobile user contacts the WSN for data harvesting. ZeDDS enables the mobile user to explicitly specify a particular replication strategy exhibiting a certain data availability and energy consumption. At run-time, ZeDDS is appropriately configured and replicates the measured sensor data according t o the replication strategy specified. We evaluate our ZeDDS implementation in terms of write operation availability measurements of a WSN consisting of TelosB sensor nodes using three different well-known replication strategies.

Pages: 11 to 16

Copyright: Copyright (c) IARIA, 2011

Publication date: November 20, 2011

Published in: conference

ISSN: 2308-4278

ISBN: 978-1-61208-171-7

Location: Lisbon, Portugal

Dates: from November 20, 2011 to November 25, 2011