of Rate and Medium Access Control in Wireless Networks
Friday, November 10, 3pm
Location: BA 1170 (Bahen Center)
It has been
observed that the combination of TCP rate control with the IEEE 802.11
MAC protocol can lead to very poor performance in terms of fairness.
However, a systematic approach to overcome this problem is still
elusive as proposed solutions are either too complex, or do
provide clear design guidelines for obtaining good system performance.
the talk, we take a fresh look at this problem. We start out by asking
the following questions: (a) what properties should a MAC protocol have
in order to provide fair bandwidth allocation among TCP connections
and (b) how can this properties be implemented in a fully
manner? An interesting aspect of our analysis is that the
protocols are conceptually very similar to well-known protocols for
wireline networks (such as active queue management and scheduling), but
their implementation take into account the unique features of wireless
networks (such as interference and the distributed nature of
congestion). There is also a connection between the presented work and
maximal weight matching schedulers.
was born in Lucerne, Switzerland. He received the Eidg. Dipl. El.-Ing.
(1993) from the ETH Zurich, Switzerland, the M.S. (1994) in electrical
engineering from the Columbia University, NY, U.S.A, and the Ph.D.
(1998) in electrical engineering from the Massachusetts Institute of
Technology, Cambridge, Massachusetts, U.S.A. He was appointed as
assistant professor in 2000, and associate professor in 2005, at the
Department of Computer Science of the University of Toronto. He has
also been a Post-Doctoral Research Fellow at the Center for
Communication Systems Research, University of Cambridge, UK, and a
visiting scientist at the Siemens Corporate Research Center in Munich.
Peter Marbach has received the IEEE INFOCOM 2002 Best Paper Award for
his paper "Priority Service and Max-Min Fairness". His research
interests are in the fields of communication networks.