Deployable Wireless Sensor Networks for Surveillance Gurminder Singh NPS/CS Center for the Study of Mobile Devices and Communications International Maritime Protection Symp. 2005 12/13/05
WSNs – Extreme Computing WSNs consist of a large number of small, low-powered and multi-function sensors nodes that are able to sense, process and communicate through collaborative efforts.
Desired Characteristics Low cost Ease of installation Self-identification Self-diagnostics Reliability Time awareness for co-ordination with other nodes Signal processing and Standard control protocol and network interfaces
WSN for Surveillance Airborne Network Sensor Network 802.15.4/Zigbee Capability Discovery Resource Aggregation Adhoc 802.11b Airborne Network GPS Enabled TactiComp Sensor Network 802.15.4/Zigbee 802.15.4/ZigBee SmartRock 802.11b Adhoc UAV 802.11 Iridium Airborne Network
Deployment Challenges Wireless Sensor Network And, the whole deal…
Deployment Challenges - Wireless Transmission Medium Vegetation vs desert High vs low humidity etc Coverage What is the range of the mote? Break vs Re-associate distance Connectivity How stable is the connection? How is it affected by the change in battery voltage? Power consumption How much power does the radio use? What happens when the voltage drops?
Battery Voltage vs. Break & Re-associate Distance – Near Free Space
Detailed Study of Mote Behavior RF Characteristics of Mica-Z Wireless Sensor Network Motes Swee Jin Koh, MS Thesis/EE, Dec 2005
Deployment Challenges - Sensor What kind of sensor modality should be used? – PIR, acoustic, magnetic, seismic… What is the range of the sensor? How reliable is the sensor? What is the resolution of the sensor? How much power does the sensor use? What is the cost of the sensor?
Detailed Study of Sensor Behavior PIR and Magnetometer Sensor Behavior Mike Chesnut / C4I, Jun 2006 (expected)
Deployment Challenges - Network How scalable is the network? How fault tolerant is the network? How is the network affected by node failure? What is the network latency? What is the packet loss behavior?
Detailed Study of Sensor Network Behavior Evaluation of the XMesh Routing Protocol in WSNs Amos Teo, MS/EE, Dec 2005
Deployment Challenges – The Whole Deal… How do we deploy the network? How do we manage the network? What are the data aggregation/fusion and analysis issues? What do you do when you detect an interesting event?
WSN Configuration Configuration and Management of WSNs, Min Young Kim/CS, Dec 2005
Current Status Started late-2004 Implemented and integrated in TNT SA System Field tested in TNT 2005 Supported by MARCORSYSCOM and TNT/CDTEMS
What’s Next? Continue testing in TNT/NPS Field Experiments (Netzer and Bordetsky IS/NPS) Tests in the Straits of Malaca, Thailand and/or Singapore (Ehlert, Steckler, IS/NPS) Integration with UAVs (Ravi V., SEA/NPS) Steve Schall, MS / CS, Jun 2006 (expected) Integration with detection of anomalous behavior (Rowe CS/NPS and Faculty at UArizona) Irvine (WSN Security) Sankar (WSN & Medical stuff)
Thank You Gurminder Singh CS/NPS gsingh@nps.edu