130911 20240201151019.0 doi 10.1109/MWC.2011.5714029 sideral 68185 ART-2011-68185 eng Marco, A. Universidad de Zaragoza (orcid)0000-0002-7396-7840 Synchronization of Multi-hop Wireless Sensor Networks at the Application layer 2011 Time synchronization is a key issue in wireless sensor networks; timestamping collected data, tasks scheduling, and efficient communications are just some applications. From all the existing techniques to achieve synchronization, those based on precisely time-stamping sync messages are the most accurate. However, working with standard protocols such as Bluetooth or ZigBee usually prevents the user from accessing lower layers and consequently reduces accuracy. A receiver-to-receiver schema improves timestamping performance because it eliminates the largest non-deterministic error at the sender's side: the medium access time. Nevertheless, utilization of existing methods in multihop networks is not feasible since the amount of extra traffic required is excessive. In this article, we present a method that allows accurate synchronization of large multihop networks, working at the application layer while keeping the message exchange to a minimum. Through an extensive experimental study, we evaluate the protocol’s performance and discuss the factors that influence synchronization accuracy the most. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/EC/FP6/035147/EU/Mainstreaming on ambient intelligence/MONAMI info:eu-repo/grantAgreement/ES/MCYT/TIN2006-15617-C03 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 2.575 2011 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE 2 / 50 = 0.04 2011 Q1 T1 TELECOMMUNICATIONS 7 / 79 = 0.089 2011 Q1 T1 ENGINEERING, ELECTRICAL & ELECTRONIC 30 / 245 = 0.122 2011 Q1 T1 COMPUTER SCIENCE, INFORMATION SYSTEMS 10 / 135 = 0.074 2011 Q1 T1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Casas, R. Universidad de Zaragoza (orcid)0000-0001-5316-8171 Sevillano, J.L. Coarasa, V. Universidad de Zaragoza Asensio, A. Universidad de Zaragoza (orcid)0000-0002-6377-5319 Obaidat, M.S. 5008 785 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Tecnología Electrónica 5008 X Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Proy. investigación JBA 18, 1 (2011), 82-88 IEEE Wirel. Commun. IEEE WIRELESS COMMUNICATIONS 1536-1284 372776 http://zaguan.unizar.es/record/130911/files/texto_completo.pdf Postprint 2924130 http://zaguan.unizar.es/record/130911/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:130911 articulos driver 2024-02-01-14:40:57 ARTICLE