Date Added: Dec 2012
The authors present the design of a cross-layer protocol to maintain connectivity in an earthquake monitoring and early warning sensor network in the absence of communications infrastructure. However, the data they provide is of critical importance to emergency and rescue decision making in the immediate aftermath of such events, as is continued early warning of aftershocks, tsunamis, or other subsequent dangers. Utilizing a Beyond Line-Of-Sight (BLOS) HF physical layer, they propose an adaptable cross-layer network design that meets these specialized requirements. They are able to provide Ultra High Connectivity (UHC) early warning on strict time deadlines under worst-case channel conditions along with providing sufficient capacity for continued seismic data collection from a 1000 sensor network.