Q-NiGHT: Adding QoS to Data Centric Storage in Non-Uniform Sensor Networks
Authors: Michele Albano, Stefano Chessa, Francesco Nidito and Susanna Pelagatti
Comments: 8 pages, 20 figures, 1 table
Abstract:
Storage of sensed data in wireless sensor networks is essential when
the sink node is unavailable due to failure and/or disconnections, but
it can also provide efficient access to sensed data to multiple sink
nodes. Recent approaches to data storage rely on Geographic Hash
Tables for efficient data storage and retrieval. These approaches
however do not support different QoS levels for different classes of
data as the programmer has no control on the level of redundancy of
data. They result in a great unbalance in the storage usage in each
sensor, even when sen- sors are uniformly distributed. This may cause
serious data losses, waste energy and shorten the overall lifetime of
the sensornet. In this paper, we propose a novel protocol, Q-NiGHT,
which (1) provides a direct control on the level of QoS in the data
dependability, and (2) uses a strategy similar to the rejection method
to build a hash function which scatters data approximately with the
same distribution of sensors. The benefits of Q-NiGHT are assessed
through a detailed simulation experiment, also discussed in the paper.
Results show its good performance on different sensors distributions
on terms of both protocol costs and load balance between sensors.
@inproceedings{MDM07QNiGHT, author = {Michele Albano and Stefano Chessa and Francesco Nidito and Susanna Pelagatti}, title = {Q-NiGHT: Adding QoS to Data Centric Storage in Non-Uniform Sensor Networks}, booktitle= {Proceedings of The 8th International Conference on Mobile Data Management (MDM'07)}, address = {Mannheim, Germany}, year = {2007} }