UCSB COMPUTER SCIENCE DEPARTMENT PRESENTS:
MONDAY, NOVEMBER 3, 2008
3:30 – 4:30
Computer Science Conference Room, Harold Frank Hall Rm. 1132
HOST: ELIZABETH BELDING
SPEAKER: HEATHER ZHENG
Faculty, UCSB Computer Science
Title: Collaborative Cognitive Radios: Putting an End to Spectrum Scarcity
The static nature of today’s spectrum allocations makes them highly
inefficient. While assigned spectrum sits unused, new prominent wireless
technologies are denied from spectrum access. If not addressed, such
inefficiency will soon put a stop to wireless growth and innovation.
This talk provides an overview of UCSB LINK lab’s research where we
tackle the artificial spectrum scarcity using cognitive radios that
dynamically access radio spectrum. Specifically, we will discuss our
recent works in the following two areas:
(1) From a networking perspective, we have designed a set of robust and
scalable systems and algorithms to provide reliable and efficient
spectrum usage to wireless networks. By proactively learning environment
conditions and coordinating with peers to make mutually consistent
decisions that maximize system-wide efficiency, wireless devices can
share spectrum fairly with peers, quickly adapt to network dynamics and
reliably obtain desired spectrum.
(2) Next, from an economic perspective, we have designed a set of
eBay-like dynamic spectrum auction systems, that utilize economic
incentives to efficiently redistribute spectrum across existing owners
and new wireless users while avoiding fear of market manipulation.
Further information on the LINK lab projects can be found at
Heather Zheng has been an assistant professor in the Computer Science
Department since Fall 2005. Her research interests are wireless networks
and systems, with a recent emphasis on cognitive radios, dynamic
spectrum access, and spectrum auctions.