**** Columbia Network Research Group Seminar ****

Title:    Ad Hoc Research at the Wireless Networks Laboratory (WNL) at
          Cornell University
Speaker:  Prof. Zygmunt Haas
          School of Electrical and Computer Engineering
          Cornell University
          Ithaca, NY 14853, U.S.A
When:     April 16, 2001 - 11 am
Where:    Room 414, CEPSR Building (Schapiro)
          Fourth Floor
          Columbia University
Host:     Prof. R. Gitlin

Abstract:

In this talk, I will describe our various research activities in the ad
hoc networking technology.  In particular, I will start with a brief
comparison of the architectural choices in the design of an ad hoc
network.  Then, after introducing the Zone Routing Protocol (ZRP), I
will present our thoughts on the applicability of the ZRP within the
overall routing framework in ad hoc networks.  Specifically, I will
argue for the importance of adaptivity in the design of the ad hoc
routing protocols, advocating the hybrid design paradigm.  While on the
topic of routing, I will discuss the benefits and shortcomings of
Alternate Path Routing strategies in ad hoc networks.  On the MAC layer,
the performance of our Dual Busy Tone Multiple Access (DBTMA) scheme
will be shown to improve on the previously proposed channel access
schemes for ad hoc networks.  Time permitting, I will mention our recent
work into quality of service and our security solutions for ad hoc
networks.

Speaker's bio:

Zygmunt J.  Haas received his B.Sc.  in EE in 1979 and M.Sc.  in EE in
1985.  In 1988, he earned his Ph.D.  from Stanford University and
subsequently joined AT&T Bell Laboratories.  As of August 1995, he
joined the faculty of the School of Electrical and Computer Engineering
at Cornell University.

Dr.  Haas is an author of numerous technical papers and holds twelve
patents in the fields of high-speed networking, wireless networks, and
optical switching.  He has organized several Workshops, delivered
tutorials at major IEEE and ACM conferences, and serves as editor of
several journals.  He has been a guest editor of three IEEE JSAC issues
("Gigabit Networks," "Mobile Computing Networks," and "Ad-Hoc
Networks").  Dr.  Haas is a Senior Member of IEEE, a voting member of
ACM, and a Vice Chair of the IEEE Technical Committee on Personal
Communications.  His interests include:  mobile and wireless
communication and networks, personal communication service, and
high-speed communication and protocols.  His e-mail is: 
haas@ee.cornell.edu and his URL is: 
http://www.ee.cornell.edu/~haas/wnl.html