Gravity-based Local Clock Synchronization in Wireless Sensor Networks

Wälchli, Markus; Zurbuchen, Reto; Staub, Thomas; Braun, Torsten (2009). Gravity-based Local Clock Synchronization in Wireless Sensor Networks. Lecture notes in computer science, 5550, pp. 907-918. Heidelberg: Springer 10.1007/978-3-642-01399-7_71

Full text not available from this repository. (Request a copy)

Contention-based MAC protocols follow periodic listen/sleep cycles. These protocols face the problem of virtual clustering if different unsynchronized listen/sleep schedules occur in the network, which has been shown to happen in wireless sensor networks. To interconnect these virtual clusters, border nodes maintaining all respective listen/sleep schedules are required. However, this is a waste of energy, if locally a common schedule can be determined. We propose to achieve local synchronization with a mechanism that is similar to gravitation. Clusters represent the mass, whereas synchronization messages sent by each cluster represent the gravitation force of the according cluster. Due to the mutual attraction caused by the clusters, all clusters merge finally. The exchange of synchronization messages itself is not altered by LACAS. Accordingly, LACAS introduces no overhead. Only a not yet used property of synchronization mechanisms is exploited.

Item Type:

Conference or Workshop Item (Paper)


08 Faculty of Science > Institute of Computer Science (INF) > Communication and Distributed Systems (CDS)
08 Faculty of Science > Institute of Computer Science (INF)

UniBE Contributor:

Wälchli, Markus; Staub, Thomas and Braun, Torsten






Lecture Notes in Computer Science






Dimitrios Xenakis

Date Deposited:

04 Oct 2013 15:23

Last Modified:

14 Jan 2015 15:36

Publisher DOI:


Web of Science ID:


URI: (FactScience: 207202)

Actions (login required)

Edit item Edit item
Provide Feedback