Exploiting Wireless Link Diversity

Instability of links and connectivity in low-power wireless sensor networks (WSNs) has so far been regarded as a difficult problem that existing routing algorithms try their utmost to avoid. Therefore, since the emergence of WSNs, research has mainly focused on link estimation and routing techniques which identify and utilize consistently high quality links for packet forwarding. Links of intermediate quality (PRR < 90%) are ignored to ensure routing stability and to attain high end-to-end reliability. Protocol studies have shown that these intermediate quality links are bursty, i.e., they frequently switch between stable and unstable periods of transmission for a limited number of consecutive packets.

In this project we are investigating the diverse behavior of low-power wireless links in the following directions: (1) Intermediate and bursty links can be used for packet forwarding during their stable periods without affecting the reliability and stability of existing routing protocols; (2) These links often achieve significantly better routing progress and routing throughput than the long-term links chosen by existing routing protocols.

Contacts

Downloads (source code)

Publications

References
Muhammad Hamad Alizai, Olaf Landsiedel and Klaus Wehrle
International Journal of Distributed Sensor Networks (IJDSN),
April 2012
ISSN: 1550-1329
to be published
Proceedings of the 2nd IEEE Student Conference, Hamburg University of Technology, Hamburg, Germany, page 5-8.
Publisher: Hamburg University of Technology, Hamburg, Germany
May 2010
Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2010), Stockholm, Sweden, page 366-367.
Publisher: ACM, New York, NY, USA
April 2010
ISBN: 978-1-60558-988-6
Muhammad Hamad Alizai, Olaf Landsiedel, Jó Agila Bitsch Link, Stefan Götz and Klaus Wehrle
Proceeding of 7th ACM Conference on Embedded Networked Sensor Systems (Sensys 09), Berkeley, CA, USA, page 71-84.
Publisher: ACM, New York, NY, USA
November 2009
ISBN: 978-1-60558-519-2
Muhammad Hamad Alizai, Olaf Landsiedel, Jó Agila Bitsch Link, Stefan Götz and Klaus Wehrle
Technical University Hamburg
September 2009
Muhammad Hamad Alizai, Olaf Landsiedel, Klaus Wehrle and Alexander Becher
Berlin, Germany
July 2008
Alexander Becher, Olaf Landsiedel, Georg Kunz and Klaus Wehrle
Proceedings of Fifth Workshop on Embedded Networked Sensors (Hot EmNets'08), Charlottesville, VA, USA, page 1--5.
Publisher: ACM Press, New York, NY, USA
June 2008
ISBN: 978-1-60558-209-2
Export as:
BibTeX, XML
- Impressum -