Improving information availability in storage-centric sensor networks

Nam Nguyen, Sudha Krishnamurthy, Peng Xie, Douglas L Jones

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We address the issue of improving information availability in a class of delay-tolerant sensor network applications, where the sensor nodes are deployed in disconnected environments. In such environments, since there is no continuous access to a remote base station, there is a need to leverage the collaborative resources of the sensor network to support in-network storage. The stored data can then be retrieved opportunistically by mobile collectors in the proximity. We have developed a data-centric, in-network storage architecture that partitions the network into storage zones. In such a scheme, some of the storage nodes may be unavailable at the time of storage and retrieval, because they are either sleeping to conserve energy or because they have failed.We present two schemes based on random linear network coding for improving information availability within such a storage architecture. In the centralized scheme, the encoding is performed by the managers in each storage zone, whereas in the decentralized scheme, the encoding is done locally by the zone members. We have implemented the network coding schemes in TinyOS and we present results that show the impact of the zone size, duty cycle, and the degree of encoding on the decoding probability, based on our experiments on a testbed of Micaz motes.

Original languageEnglish (US)
Title of host publication33rd IEEE Conference on Local Computer Networks, LCN 2008
Pages82-90
Number of pages9
DOIs
StatePublished - Dec 31 2008
Event33rd IEEE Conference on Local Computer Networks, LCN 2008 - Montreal, AB, Canada
Duration: Oct 14 2008Oct 17 2008

Publication series

NameProceedings - Conference on Local Computer Networks, LCN

Other

Other33rd IEEE Conference on Local Computer Networks, LCN 2008
CountryCanada
CityMontreal, AB
Period10/14/0810/17/08

Keywords

  • Data-centric storage
  • Information availability
  • Network coding
  • Sensor networks

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture

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  • Cite this

    Nguyen, N., Krishnamurthy, S., Xie, P., & Jones, D. L. (2008). Improving information availability in storage-centric sensor networks. In 33rd IEEE Conference on Local Computer Networks, LCN 2008 (pp. 82-90). [4664155] (Proceedings - Conference on Local Computer Networks, LCN). https://doi.org/10.1109/LCN.2008.4664155