Journal ArticleDOI
Time synchronization in sensor networks: a survey
Fikret Sivrikaya,Bülent Yener +1 more
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TLDR
The time synchronization problem and the need for synchronization in sensor networks is reviewed, then the basic synchronization methods explicitly designed and proposed for sensor networks are presented.Abstract:
Time synchronization is an important issue in multihop ad hoc wireless networks such as sensor networks. Many applications of sensor networks need local clocks of sensor nodes to be synchronized, requiring various degrees of precision. Some intrinsic properties of sensor networks, such as limited resources of energy, storage, computation, and bandwidth, combined with potentially high density of nodes make traditional synchronization methods unsuitable for these networks. Hence, there has been an increasing research focus on designing synchronization algorithms specifically for sensor networks. This article reviews the time synchronization problem and the need for synchronization in sensor networks, then presents in detail the basic synchronization methods explicitly designed and proposed for sensor networks.read more
Citations
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Journal ArticleDOI
Locating the nodes: cooperative localization in wireless sensor networks
Neal Patwari,Joshua N. Ash,Spyros Kyperountas,Alfred O. Hero,Randolph L. Moses,Neiyer S. Correal,Neiyer S. Correal +6 more
TL;DR: Using the models, the authors have shown the calculation of a Cramer-Rao bound (CRB) on the location estimation precision possible for a given set of measurements in wireless sensor networks.
Journal ArticleDOI
Synchronization in complex networks
Alex Arenas,Alex Arenas,Albert Díaz-Guilera,Albert Díaz-Guilera,Jürgen Kurths,Jürgen Kurths,Yamir Moreno,Changsong Zhou +7 more
TL;DR: The advances in the comprehension of synchronization phenomena when oscillating elements are constrained to interact in a complex network topology are reported and the new emergent features coming out from the interplay between the structure and the function of the underlying pattern of connections are overviewed.
Journal ArticleDOI
Energy conservation in wireless sensor networks: A survey
TL;DR: This paper breaks down the energy consumption for the components of a typical sensor node, and discusses the main directions to energy conservation in WSNs, and presents a systematic and comprehensive taxonomy of the energy conservation schemes.
Journal ArticleDOI
Ranging With Ultrawide Bandwidth Signals in Multipath Environments
TL;DR: In this paper, the authors provide an overview of ranging techniques together with the primary sources of TOA error (including propagation effects, clock drift, and interference) and describe fundamental TOA bounds (such as the Cramer-Rao bound and tighter Ziv-Zakai bound) in both ideal and multipath environments.
Journal ArticleDOI
Wireless sensor networks: applications and challenges of ubiquitous sensing
TL;DR: CAS will be able to provide a substantial contribution to the development of sensor networks, and has already been designed to test the many ideas spawned by the research community and to implement applications to virtually all fields of science and technology.
References
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Journal ArticleDOI
Fine-grained network time synchronization using reference broadcasts
TL;DR: Reference Broadcast Synchronization (RBS) as discussed by the authors is a scheme in which nodes send reference beacons to their neighbors using physical-layer broadcasts, and receivers use their arrival time as a point of reference for comparing their clocks.
Proceedings ArticleDOI
Timing-sync protocol for sensor networks
TL;DR: It is argued that TPSN roughly gives a 2x better performance as compared to Reference Broadcast Synchronization (RBS) and verify this by implementing RBS on motes and use simulations to verify its accuracy over large-scale networks.
Journal Article
Time synchronization in wireless sensor networks
Jeremy Elson,Deborah Estrin +1 more
TL;DR: In this article, a service model for time synchronization is proposed to better support the broad range of application requirements seen in sensor networks, while meeting the unique resource constraints found in such systems.
Journal ArticleDOI
Wireless sensor networks: a new regime for time synchronization
Jeremy Elson,Kay Römer +1 more
TL;DR: It is argued that time synchronization schemes developed for traditional networks such as NTP are ill-suited for WSNs and suggest more appropriate approaches.
Proceedings ArticleDOI
Time synchronization in ad hoc networks
TL;DR: This work presents a time synchronization scheme that is appropriate for sparse ad hoc networks and explains how the data sensed by various smart things can be combined to derive knowledge about the environment, which enables the smart things to "react" intelligently to their environment.