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Data Collection by a Mobile Observer in a Single-hop Sensor Network

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dc.contributor.author Chakrabarti, Arnab
Sabharwal, Ashutosh
Aazhang, Behnaam
dc.creator Chakrabarti, Arnab
Sabharwal, Ashutosh
Aazhang, Behnaam
dc.date.accessioned 2007-10-31T00:39:09Z
dc.date.available 2007-10-31T00:39:09Z
dc.date.issued 2005-01-15
dc.date.submitted 2005-01-05
dc.identifier.uri http://hdl.handle.net/1911/19778
dc.description Journal Paper
dc.description.abstract In this paper, we demonstrate significant reduction in communication power by using a mobile observer to collect data from a wireless single-hop network of static sensors. The key challenge in using a mobile observer is that it remains within range of any sensor for a limited period, and inability to transfer data in this period causes data loss. This prompts us to choose the fraction of nodes successful in communicating data as our performance constraint as we try to minimize network power. First, we establish that the process of data collection by a mobile observer is analogous to a queue. The queuing-based data collection model is then used as a design tool to identify the combination of system parameters that satisfies the performance metric with minimum power. Second, we derive a sufficient condition on node placement for zero data loss in a mobile observer network. As our third contribution, we demonstrate that in a dense network, the data collection analysis is much simpler, which allows us to obtain closed expressions for the network power. Power comparisons with static observer networks show that power reduction by multiple orders of magnitude is typical. The scenarios chosen for power comparisons also provide guidelines on the choice of path, if such a choice is available. As an example, a disc shaped network is analyzed and among the set of concentric circular paths, the best path is identified.
dc.language.iso eng
dc.subject sensor network
single-hop
mobility
communication
power
queuing
dc.title Data Collection by a Mobile Observer in a Single-hop Sensor Network
dc.type Journal article
dc.citation.bibtexName article
dc.citation.journalTitle ACM Transactions on Sensor Networks
dc.date.modified 2005-01-05
dc.contributor.org Center for Multimedia Communications (http://cmc.rice.edu/)
dc.subject.keyword sensor network
single-hop
mobility
communication
power
queuing
dc.relation.project http://ece.rice.edu/~arnychak
dc.type.dcmi Text
dc.identifier.citation A. Chakrabarti, A. Sabharwal and B. Aazhang, "Data Collection by a Mobile Observer in a Single-hop Sensor Network," ACM Transactions on Sensor Networks, 2005.

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  • ECE Publications [1048 items]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students
  • CMC Publications [275 items]
    Publications by Rice Faculty and graduate students in multimedia communications