Welcome to CS580S!!! KD Kang

What are sensor networks? Small, wireless, battery-powered sensors MICA2 mote Smart Dust

Why small, wireless, battery- powered sensors? Traditional big, wired sensors –Expensive, inefficient, hard to deploy, power-consuming –Undesirable: Deployment of big traditional sensors can disturb the environment, in habitat monitoring –Dangerous: Imagine manual deployment of big traditional sensors for structural monitoring or battlefield monitoring

WSN Applications Inexpensive micro- sensors & on-board processing Ad-hoc deployment thanks to wireless communications – No communication infra should be built In-situ monitoring Spatially and temporally dense monitoring Monitor previously unobservable phenomena Seismic Structure response Contaminant Transport Marine Microorganisms Ecosystems, Biocomplexity

Applications Precision Agriculture Habitat Monitoring Great Duck Island Medical Application CodeBlue at Harvard Structural Monitoring Golden Gate Bridge

Hot, exciting area of research For example, read a NY Times article below Many more articles about WSN applications and expected economic impacts WSNs work in totally new environments –New computing paradigms required!!!

Course Topics Hardware & Operating Systems Programming & Debugging Medium access control Routing Real-time Communication & QoS Localization Time synchronization Query Processing and data aggregation Security

Grading Paper critique: 10% Paper presentation: 20% Project: 60% Class Participation: 10% No exam! No homework!!

One Page Paper Critique Part A: Briefly identify the key contributions of the paper –What research problem does it try to solve? –Why is it an important problem? –What's the proposed approach? Part B: Try to find if there is any problem in the paper –Any problems in the assumptions? –Any technical shortcomings or drawbacks? –Do the experimental results support the original claim? Part C: Any idea for improvement? (Optional) –Most challenging part –You can get the full credit by finishing Parts A and B –But, you are encouraged to try do this part as well

Paper Presentation 25 minute presentation –Present key ideas & performance results –Discuss related work to show how the paper presented by you is different from other work 5 minutes for questions & discussions

Project Max 2 students can work as a team –Find your team! “Try” to find a new idea –Your final results may not be novel, but that’s OK –If it’s novel, it’s even better Example: –Implement and compare 2-3 existing routing or data aggregation protocols –Implement a localization protocol and inject attacks: Observe what happens & discuss possible countermeasures –Implement an existing packet scheduling algorithm and tweak it to improve the performance –Use your imagination!

Next Class Read “Overview of Sensor Networks” in the Reading List ( of Sensor Networks –No critique required for this paper

Questions?