Sensor Network Xiang Mao & Qin Chen Department of Electrical & Computer Engineering 04:35 Question! and Sensor Network Which is more important ??? 04:35 1. Introduction 04:35 Introduction Sensor network or more commonly wireless sensor network (WSN) is a network consists of spatially distributed autonomous sensors to cooperatively monitor physical or environmental conditions, such as temperature, sound, motion, vibration, pressure, or pollutants. Wikipedia This idea was born in late 1990s Sensing Computing Communication 04:35 Features Sensor nodes are of a large number low-cost low-power multiple function small in size 04:35 The number of sensor nodes can be several orders of magnitude higher than the nodes in an ad hoc network More densely deployed; Nodes may not have global identification (ID). Broadcast vs. peer-to-peer communication The mobility of sensor nodes is lower than nodes in an ad hoc network Sensor nodes are prone to failures Sensor nodes are limited in power, computational capacities, and memory WSN vs. Ad Hoc Networks 04:35 One of the 10 technologies that will change the world, MIT Technology Review, 2003 Technology Innovation Moores law Energy capacity miniaturization MEMS System-on-chip Integration 04:35 Components of a Sensor Node 04:35 Communication Architecture The sensor nodes are usually scattered in a sensor field Each of these scattered sensor nodes has the capabilities to collect data and route data back to the sink The sink may communicate with the task manager node via Internet or Satellite. 04:35 The network protocol stack are used by the sink and sensor nodes. Network Protocol Stack 04:35 2. Application 04:35 ? In The Movie Twister (1996) Thanks to the National Severe Storms Lab(NSSL) and the University of Oklahoma 04:35 Famous Prototype Great Duck Island (2002) Transit Network Basestation Gateway Sensor Patch Patch Network Base-Remote Link Data Service Internet Client Data Browsing and Processing Sensor Node Burrow Occupancy Detector Miniature Weather Station 04:35 Senera Bridge Monitoring 04:35 Our Fancy Stuff (2007) 04:35 3. Future Development 04:35 Sensor Web is a Web of Webs Innovation: Sensor Network Sensor Web 04:35 Sensor Web Temperature Sensor Humidity Sensor Optical Sensor Smoke Sensor Remote Sensing Satellite Web Camera Billing-related Device Mobile Devices Generalized Concept of Sensor 04:35 NASA (JPL) Project Space + Sky + Land + Ocean Rover Sensor Nodes Base Station Lander Spacecraft 04:35 I had a dream SensorMap by Microsoft 04:35 Analytical Study: Central vs. In-network Data Processing Topic. 1 04:35 Outline In-network vs. centralized computing Environmental factors Topology Cache Dataset Results Conclusion 04:35 Why In-network Processing? 3.6V Idle