Report from Battlemesh v7 Leipzig SL

Battlemesh V7 in Leipzig is now over, more than 100 developers, active in community and other wireless networks, came together to test, debug and improve hardware, wireless drivers, routing protocols and user applications. We had fun, learned a lot, got to know each-other and formed a range of ideas for future work.

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I have presented recent developments of the wireless optical link KORUZA and deployed it from the sublab to a trailer park across the river for the duration of a few days, obtaining valuable experimental data of this 1 Gbps 90 meters long link and properly demonstrating the system. The mechanical mounting has been improvised on both sides, leading to noticeable pointing instability in windier conditions. Overall there was a lot of interest for this project, fueling up motivation for future work.

Furthermore, I have presented two more topics, Hunting the digital fox at 5 GHz (video recording), concerned with discovering locations of wireless nodes over a larger area, and Serval Rugged Battery Pack (video recording) about the development of a low cost battery system for community networks, that is suitable for a wide range of intermittent power sources. First prototypes shown have generated quite some interest and the debate feedback was very valuable for further development and creating a truly useful system.

This year, the battle of different routing protocols was run on the test deployment of Wibed experiment deployment firmware, created in CONFINE project to allow easy experimentation. After a few days of debugging we have set up the testbed and ran three main experiments:

Evaluating the effect on throughput of a pooling algorithm TDMA (AirMax), compared to the RTS/CTS mechanism on AirOS and OpenWrt firmwares, preliminary showing a clear advantage of using TDMA. The second experiment tested the behavior of mesh routing algorithms on wired powerline networks, while the last and the classical experiment put several routing protocols head to head, comparing performance, overhead, routing convergence and some other tests.

Overall, the event offered some very good and pleasant experiences and is definitely worth attending in the future.