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Q-NiGHT: Adding QoS to Data Centric Storage in Non-Uniform Sensor Networks

Albano, Michele and Chessa, Stefano and Nidito, Francesco and Pelagatti, Susanna (2006) Q-NiGHT: Adding QoS to Data Centric Storage in Non-Uniform Sensor Networks. Technical Report del Dipartimento di Informatica . Università di Pisa, Pisa, IT.

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    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 (and thus on data dependability). Moreover, they result in a great unbalance in the storage usage in each sensor, even when sensors 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 as sensors. The benefits of QNiGHT 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.

    Item Type: Book
    Uncontrolled Keywords: wireless sensor networks, geographic hash tables, data centric storage, load balancing, quality of service, deployment non uniformity
    Subjects: Area01 - Scienze matematiche e informatiche > INF/01 - Informatica
    Divisions: Dipartimenti (until 2012) > DIPARTIMENTO DI INFORMATICA
    Depositing User: dott.ssa Sandra Faita
    Date Deposited: 09 Dec 2014 13:10
    Last Modified: 09 Dec 2014 13:10
    URI: http://eprints.adm.unipi.it/id/eprint/2169

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