[UCI-Calit2] Upcoming Lecture

[Anna Lynn Spitzer]

Title:                                   New Results on the Throughput
and Delay of Packet Radio Links

 

Speaker:                                  Prof. Aria Nosratinia,
University of Texas at Dallas

 

Time:                                      2-3 p.m.

 

Date:                                      Friday, May 4, 2007

 

Location:                                  Engineering Tower, Room 331

 

 

 

Abstract:

 

New results will be presented on the throughput and delay of packet
radio links under block fading and general hidden Markovian fading. It
is well-known, for example, that the throughput of the selective repeat
ARQ in a channel with erasure rate e is (1-e). Unfortunately, such
simple results are only true with fully reliable feedback.

Unreliable feedback, as is predominant in wireless links, significantly
complicates the problem. This talk presents a systematic method for
analyzing various throughput problems in the presence of channel-driven
feedback/feedforward packet erasure errors, as well as link timeouts.
This is achieved via a generalization of Mason graphs to include
matrix-valued link gains. The talk starts with a tutorial on the Mason
graph technique for calculating throughput. We will then visit both
selective-repeat as well as go-back-N ARQ on two classes of wireless
channels: the block fading channel and the correlated fading channel. It
is believed that the new methodology can open the door to further
analyses and better modeling for packet radio networks. We will discuss
some of the practical benefits of this new analysis for wireless network
engineers.

 

 

Bio:

 

Aria Nosratinia is associate professor of Electrical Engineering at the
University of Texas at Dallas. His research interests are in the broad
area of signal processing and information theory. In particular, his
recent work has been in the area of opportunistic communication,
cooperative communication, and cross-layer issues. He received a
bachelor's degree in electrical engineering from the University of
Tehran and a master's from the University of Windsor, both in electrical
engineering, and a doctorate in electrical and computer engineering from
the University of Illinois at Urbana-Champaign. He has held visiting
positions at Princeton University, Rice University and UCLA. He received
the NSF career award in 2000. He is currently editor for IEEE
Transactions on Image Processing, IEEE Transactions on Wireless
Communications, IEEE Signal Processing Letters, and IEEE Communications
(magazine).

 

 

 

 

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