1. low cost wireless networking sebastian büttrich (wire.less.dk)

3. What is low cost wireless networking?
a/b/g – license exempt frequencies (ISM bands)
NOT Wimax, NOT proprietary frequencies and technologies
Open technology: free and open source software, open hardware

7. Where and why? In areas of ”market failure”
Where the ”last mile” (or first mile, rather) is too expensive
Remote and rural regions
Low population density regions
Mountains, islands, ....
Underprivileged areas of all kinds
But also in the middle of highly privileged areas
Also: for sensor webs, disaster / early warning systems, power networks, tourism networks, ...

9. Strengths Equipment cheap and widely available
Free sharing between many users helps bring down the cost of connectivity
Empowering users: networks are run and maintained by those who use them

11. So what can we do today? 10 km point to point links for < $100
50 km links for < $200
With some software hacking, more than 100 km are possible
Current world record is at 382 km (without additional amplifiers)
Mesh networks with 1000s of nodes

12. Mesh networks Networks in which everybody connects to everybody else
No master and client
Ad hoc mode

13. What is a mesh?

14. What is a mesh?

15. Island meshing

16. Island meshing

17. Sengerema Mesh, TZ

18. Mesh cases Sengerema: Installation

19. Sengerema Mesh

20. Sengerema Mesh

21. Nepal Wireless

22. Nepal Wireless
Towers ...

23. issues / obstacles #1 power / electricity #2 financing
#3 skills / capacity / brain drain
#4 policy and regulations

24. playground power

25. #2 power: convergence

26. wirelessU.org & wndw.net

27. Vinaka. Sebastian Büttrich http://wire. less. dk http://wirelessU
Vinaka! Sebastian Büttrich Network Startup Research Center (NSRC) twitter: less_sebastian