Center for Embedded Network Sensing

The Seismic Applications group is working to increase the practical limits of the density of seismic deployments and move to more rapid data gathering in temporary deployments. Temporary deployments in seismology typically consist of stand-alone sites in order to decrease installation time. Data must be collected either periodically from each site or at the end of the experiment and incorporated into a data base for analysis. Permanent seismic installations do transmit data immediately to central data bases through ethernet, point-to-point radio, and modem. We add the ’¡Èreal-time’¡É data collection of permanent installations to temporary networks with multi-hop networking. Off-the-shelf 802.11 wireless radio cards are incorporated with an Intel Stargate computer running Roofnet networking software. In-house software is developed to collect data and route it hop-by-hop through the network to a central data repository. Hop-by-hop data movement allows data to pass effectively through the radio network despite breaks or flaky links within the network.