Freemote A Wireless Sensor Networks Emulation System MINEMA

Freemote: A Wireless Sensor Networks Emulation System MINEMA Workshop – Lappeenranta – Finland – 21. 08. 2008 Raphael Kummer raphael. kummer@unine. ch Timothée Maret timothee. maret@hefr. ch Peter Kropf peter. kropf@unine. ch Jean-Frédéric Wagen jean-frederic. wagen@hefr. ch

Agenda ◆Context ◆Freemote architecture ◆How to work with Freemote ◆Future improvements ◆Conclusion

Wireless Sensor Networks ◆ Highly specialized operating systems adapted to limited hardware resource ► Tiny. Os ► Contiki ► … ◆ Complex, hard to learn programming languages ► Nes. C ◆ Application specific virtual machine ► Maté ► Swiss. QM ◆ Freemote: ► Lightweight Java-based tool for Java-based motes ► Focus on behavior credibility ► Mix real and emulated nodes ► Fully configurable ► Compatible with standards

Freemote: idea

Freemote: Architecture

Freemote: Architecture

Develop for Freemote

Run your Application

Watch your Application

Future development ◆ Integrate emerging Java Motes like Sentilla Point ◆ Integrate Tiny. OS 2 ◆ Linking Freemote with TOSSIM ► Running experiments including Java and Tiny. OS nodes (Tiny. OS 1 & 2) ◆ Link topology manager with In. Cov (Echenard and Wagen 2006) ► Reproduce IEEE 802. 15 signal propagation in indoor environments ► Emulate more realistically WSNs ► Experiment network ◆ Introduce realistic energy consumption measurements ◆ Introduce CPU measurements ◆ Provide live configuration and statistical tools

Preliminary experiment ◆ « ping » request using Tiny. OS 1 (AODV ad-hoc routing)

In. Cov : Coverage prediction for realistic radio simulation ISM Zig. Bee 2. 4 GHz band In. Cov prediction could replace the unrealistic circular coverage usually used in simulations [ http: //home. hefr. ch/wagen/In. Cov/ ]

Validation In. Cov RSSI Up RSSI Down RSSI Up Both Received Signal Strengh Indicator RSSI estimated on the up- and down-link (or no coverage) are measured and compared to In. Cov prediction (shown previously).

Conclusion ◆ 10’ 000 nodes emulation system ◆ Java Mote emulation system ◆ Same code runs on emulated nodes and JMotes (EIA-FR) ◆ Zig. Bee compatible (e. g. , Berkeley motes) ◆ GUI ◆ Available at: http: //www. assembla. com/wiki/show/freemote/ ► Free code source ► Run directly from website (Java Web Start) ◆ Basic system ► Many possible improvements (Tiny. OS 1 not supported anymore => TYMO routing, Java on Sentilla motes, In. Cov validation in various building, … ) ► Open to propositions: contact authors

Thanks to Fabien Le Saoût & Pierre Plaçais for their work during their 3 months stay at EIA-FR Thank you! MINEMA Workshop – Lappeenranta – Finland – 21. 08. 2008 http: //www. assembla. com/wiki/show/freemote