Lecture 22: Wireless Sensor Security blah

Sensor Nodes basic part of a sensor network components low-power processor limited memory array of sensors (magnetometer, accelerometer, radar, infrared sensor, microphone, etc.) radio transmitter power source (battery) main constraint – low power other constraints – memory, slow processor other characteristics – not mobile, programmable, ad hoc netowork

Prototype Networked Sensor (Mote) 4Mhz, 8bit MCU 512 bytes RAM, 8K ROM 900Mhz Radio 10-30 ft. range light and other sensors ADC LED outputs serial Port

Other Sensor Exampls LWIM III UCLA, 1996 Geophone, RFM radio, PIC, star network AWAIRS I UCLA/RSC 1998 Geophone, DS/SS Radio, strongARM, Multi-hop networks Sensor Mote UCB, 2000 RFM radio, Atmel Medusa, MK-2 UCLA NESL 2002 Over the past seven years, nodes have gone both in the directions of smaller size and increased capabilities. Some of these are now to the point that they can be conveniently programmed by groups other than the developers, and thus may be used in support of scientific experiments. All the nodes illustrated are descendents in various senses of the UCLA LWIM project. Predecessors in DARPA Packet Radio program USC-ISI Distributed Sensor Network Project (DSN)

Embedded Networked Sensing Potential Micro-sensors, on-board processing, wireless interfaces feasible at very small scale--can monitor phenomena “up close” Enables spatially and temporally dense environmental monitoring Embedded Networked Sensing will reveal previously unobservable phenomena Ecosystems, Biocomplexity Contaminant Transport Marine Microorganisms Seismic Structure Response