Synchronization of Multi-hop Wireless Sensor Networks at the Application layer

Marco, A. (Universidad de Zaragoza) ; Casas, R. (Universidad de Zaragoza) ; Sevillano, J.L. ; Coarasa, V. (Universidad de Zaragoza) ; Asensio, A. (Universidad de Zaragoza) ; Obaidat, M.S.

Resumen: 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.

Idioma: Inglés

DOI: 10.1109/MWC.2011.5714029

Año: 2011

Publicado en: IEEE WIRELESS COMMUNICATIONS 18, 1 (2011), 82-88
ISSN: 1536-1284

Factor impacto JCR: 2.575 (2011)

Categ. JCR: COMPUTER SCIENCE, HARDWARE & ARCHITECTURE rank: 2 / 50 = 0.04 (2011) - Q1 - T1
Categ. JCR: TELECOMMUNICATIONS rank: 7 / 79 = 0.089 (2011) - Q1 - T1
Categ. JCR: ENGINEERING, ELECTRICAL & ELECTRONIC rank: 30 / 245 = 0.122 (2011) - Q1 - T1
Categ. JCR: COMPUTER SCIENCE, INFORMATION SYSTEMS rank: 10 / 135 = 0.074 (2011) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/EC/FP6/035147/EU/Mainstreaming on ambient intelligence/MONAMI
Financiación: info:eu-repo/grantAgreement/ES/MCYT/TIN2006-15617-C03

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Tecnología Electrónica (Dpto. Ingeniería Electrón.Com.)
Área (Departamento): Proy. investigación JBA (Dpto. Ingeniería Electrón.Com.)