*특별세미나 이며 정보통신연구소 세미나실(222호)에서 5:15~ 개최됩니다*
Abstract: Recent works have shown the importance of PHY layer effects on higher
layer network protocols and their performance, including coding, MAC,
and transport protocols. In this talk, we will discuss the performance
effects of spatial diversity in indoor wireless environments that
operate as IEEE 802.11 hot spots. We will show that severe unfairness
can result when 2.4-5 GHz spectra are mediated by DCF (distributed
coordination function), 802.11’s multiple access protocol. We will show
that the physics of the wireless medium can be managed through legacy
compatible network layer controls that mitigate unfairness. Our results
are derived from a combination of ray tracing, network simulation, and
experiments. We will conclude with a discussion of related PHY inspired
problems and their impact on network software.
Bio: Kihong Park is an associate professor in the Department of Computer
Science at Purdue University. Prof. Park’s research spans the design
and control of network systems, dynamics of large-scale distributed
systems, and emotive computing systems. In networking, he has published
in venues including ACM SIGCOMM, ACM SIGMETRICS, IEEE ICNP, and IEEE
INFOCOM, and has edited two books “Self-Similar Network Traffic and
Performance Evaluation” (Wiley-Interscience 2000) and “The Internet as
a Large-Scale Complex System” (Oxford University Press 2005) with
Walter Willinger. Prof. Park was a Presidential University Fellow at
Boston University, a recipient of the NSF CAREER Award, a Fellow-at-Large
of the Santa Fe Institute, and served on several international program
committees and government panels. His research has been supported by
grants from government and industry including Army, DARPA, ETRI, Intel,
NSF, SFI, Sprint, and Xerox.