Graz, August 31, 2010 AIECS 2010

SOSEWIN

A Wireless Self-Organizing Network

for

Seismic Early Warning

and Rapid Response

Wolfgang Reisig

Istanbul: an area of earthquakes

Early Warning ???An earthquake yields two types of waves:

1.The P-wave : quick (e.g. 5 km per second) and shallow2.The S-wave : slow (e.g. 3 km per second) and powerful

41 km off epicenter, the P-wave arrives 5.0 s before S-wave.

Idea: identify the P-wave, close supplies forgas, electricity, etcbefore S-wave arrives.

at present: few high sensitive seismometers in the outskirts

not useable for early warning

SOSEWIN idea many low cost seismometerson top of buildings,bundled in a wireless network,with two purposes:

1.Early Warning2.Ad hoc local damage estimation

The core problems at the crucial moment …

• the network is mobile• seismometers fail• links deteriorate• … or it has just been a heavy truck, a mouse, wind …

idea:cover all those effects by software!

SOSEWIN network• 20 low-cost seismometers 300 € / node• wireless• meshed, multi-hop• distance: up to 200m

a P-wave approaching …

the Structure of SOSEWIN

half the members

a P-wave approaching …

the Structure of SOSEWIN

half the members

half the groups:

Alarm !!!!!!

a P-wave approaching …

the Structure of SOSEWIN

half the members

half the groups:

Alarm !!!!!!

a P-wave approaching …

the Structure of SOSEWIN

how would you organize all this?

you need distributed algorithmsleader electionecho algorithm

how would you model all this?

MSC /LSCPetri NetsASM

ad hoc reaction by predefined scenariosSOSEWIN

alarm

authority

start

sirens

sound

gas supply

shutdown

close valvescompleted

authority gas supply

valve x failed

close valves

fire dept.

priority alert at x

Graz, August 31, 2010 AIECS 2010

SOSEWIN

A Wireless Self-Organizing Network

for

Seismic Early Warning

and Rapid Response

Wolfgang Reisig

The end