TTCG: three-tier context gathering technique for mobile devices

Authors:
Su-Hwan Sho;Kyung-Sik Kim;Wu-rak Jun;Jin-Sung Kim;Seung-Hoon Kim;Jae-Dong Lee
Affiliations:
Dankook University, Yongin, South Korea;Dankook University, Yongin, South Korea;Dankook University, Yongin, South Korea;Dankook University, Yongin, South Korea;Dankook University, Cheonan, South Korea;Dankook University, Yongin, South Korea
Venue:
Proceedings of the 5th international conference on Pervasive services
Year:
2008

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Abstract

Previous research on sensor networks mainly focused on efficient transmission of data from sensors to fixed sink nodes. Recently there has been active research on mobile sink nodes, but the re-search of an environment where both fixed sink nodes and mobile sinks are present at the same time is rather scarce. This paper proposes a technique for context gathering by mobile de-vices with the sink functionality added through fixed sinks under a previously-built, cluster-based multi-hop sensor network environment. To this end, clustering of mobile devices were done based on the fixed sinks of a previously-built sensor network, and by using appropriate fixed sinks, context gathering was made possible. By mathematical comparison with TTDD routing proto-col, which was proposed for mobile sinks, it was confirmed that performance increases in energy with the number of mobile sinks, and with the number of movements by mobile devices.