Spatio-temporal sampling, rates and energy efficiency in wireless sensor networks

    Authors

    S. Bandyopadhyay; Q. J. Tian;E. J. Coyle

    Comments

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    Abbreviated Journal Title

    IEEE-ACM Trans. Netw.

    Keywords

    clustered networks; sensor networks; spatio-temporal sampling; Computer Science, Hardware & Architecture; Computer Science, Theory &; Methods; Engineering, Electrical & Electronic; Telecommunications

    Abstract

    A multi-hop network of wireless sensors can be used to gather spatio-temporal samples of a physical phenomenon and transmit these samples to a processing center. This paper addresses an important issue in the design of such networks: determining the spatio-temporal sampling rate of the network under conditions of minimum energy usage. A new collision-free protocol for gathering sensor data is-used to obtain analytical results that characterize the tradeoffs among sensor density, energy usage, throughput, delay, temporal sampling rates and spatial sampling rates in wireless sensor networks. We also show that the lower bound on the delay incurred in gathering data is O(k(2)n) in a clustered network of n sensors with at most k hops between any sensor and its clusterhead (CH). Simulation results on the tradeoff between the achievable spatial sampling rates and the achievable temporal sampling rates when IEEE 802.11 distributed coordination function (DCF) is used as the media access scheme are provided and compared with the analytical results obtained in this paper.

    Journal Title

    Ieee-Acm Transactions on Networking

    Volume

    13

    Issue/Number

    6

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    1339

    Last Page

    1352

    WOS Identifier

    WOS:000234121500011

    ISSN

    1063-6692

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