Expendable, tactically interconnected RF sensor network

Intelligent Automation, Inc. (IAI), proposes a novel, expendable, tactically interconnected cluster of RF sensors forming a sensor network. The use of communication links as tripwire sensor is the innovation of this proposal. We propose to use the radio motes called Mica2Dot (916 Mhz) and Telos (2.4 GHz, which use the Zigbee Protocol) from Crossbow Technology Inc, CA. Open source software called TinyOS operating system will be used in programming the motes. The communication/ RF links in such a sensor network will be exploited as follows: Real time tripwire sensing: We use the RF communication link itself as a bi-static radar to detect any movements near the Line Of Sight between radios (sensors). Hence we can:  Distinguish between human, animal, and vehicular intruders.  Separate signal strength fluctuations due to nearby cell phones or other transmitters to those caused by physical intrusions. Real time Intelligence: Effective intelligent algorithm  Determines moving intruder information position, velocity and direction  Alerts the next node to get ready to listen to this intruder that is coming in its direction  Resolves simultaneous detection of more than one moving intruder advancing in different directions