"A Receiver-Initiated Link Layer for Low-Power Wireless", Invited Seminar by Prof. Prabal Dutta, University of Michigan

A Receiver-Initiated Link Layer for Low-Power WirelessPrabal DuttaAssistant ProfessorUniversity of MichiganMonday, April 19, 2010AbstractThis talk will present A-MAC, a receiver-initiated link layer for
low-power wireless networks that supports several services under aunified architecture, and does so more efficiently and scalably thanprior approaches.  A-MAC's versatilty stems from layering a range oflink layer services above a single, flexible synchronization primitive
called Backcast.  A-MAC's efficiency stems from optimizing thisprimitive, and with it the most consequential decision that alow-power link makes: whether to stay awake or go to sleep afterprobing the channel.  Modern receiver-initiated protocols require more
time and energy to make this decision, and they exhibit worsejudgement as well, leading to many false positives and negatives, andlower packet delivery ratios.  A-MAC makes this decision quickly, anddecides more conclusively and correctly, than earlier approaches.
Experiences with A-MAC show that a unified implementation thatsupports unicast, broadcast, wakeup, and pollcast is feasible andefficient across a range of communications workloads and duty cycles,highlighting new directions for radio hardware and link layer
research.BiographyPrabal Dutta is an Assistant Professor at the University of Michigan,Ann Arbor.  His interests span systems, networking, and architecture,with a focus on wireless, embedded, networked, and sensing platforms.
He enjoys building novel systems that enable new applications, explorenew research directions, and have the potential for intellectualimpact.  His recent work has been commercialized by Aginova, ArchRock, Crossbow, Moteiv, Moteware, and Vectare, and is in use by
hundreds of researchers and practitioners worldwide.  He earned aPh.D. in Computer Science from the University of California, Berkeley.

Monday, April 19, 2010, 12:00