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Topic:        Performability Modelling of Wireless Communication Systems
Speaker:   Prof Kishore Trivedi, Duke University
Date:          18th August 2009
Time:          6.30PM - 8.00PM
Venue:       AT&T Labs, 9505 Arboretum Blvd, Austin, TX  78759
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Contact:       Saurabh Sureka -

Talk Abstract:
The high expectations of performance and availability for wireless mobile systems has presented great challenges in the modeling and design of fault tolerant wireless systems. The proper modeling methodology to study the degradation of such systems is so-called  performability modeling. In this talk, we give an overview of approaches for the construction and the solution of performablity models for wireless cellular networks. First, we start with the Erlang loss model, in which hierarchical and composite Markov chains are constructed to obtain loss formulas for a system with channel failures. Consequently, we develop  a two level hierarchical model for the wireless cellular system with handoff and channel failures

Speaker Profile:
Prof Trivedi holds the Hudson Chair in the Department of Electrical and Computer Engineering at Duke University, Durham, NC. He also holds a joint appointment in the Department of Computer Science at Duke. He was the Duke-Site Director of an NSF Industry-University Cooperative Research Center between NC State University and Duke University for carrying out applied research in computing and communications. He has been on the Duke faculty since 1975. He has served as a Principal Investigator on various AFOSR, ARO, Burroughs, DARPA, Draper Lab, IBM, DEC, Alcatel, Telcordia, Motorola, NASA, NIH, ONR, NSWC, Boeing, Union Switch and Signals, NSF, and SPC funded projects and as a consultant to industry and research laboratories. He was an Editor of the IEEE Transactions on Computers from 1983-1987. He is on the editorial board of the IEEE Transactions on Dependable and Secure Systems. He is a co-designer of HARP, SAVE, SHARPE, SPNP, and SREPT modeling packages. These packages have been widely circulated. He is the author of a well known text entitled, Probability and Statistics with Reliability, Queuing and Computer Science Applications, originally published by Prentice-Hall. A thoroughly revised second edition has been published by Wiley. A comprehensive solution manual for the second edition containing more than 300 problem solutions is now available from the publisher (John Wiley).Power point slides of chapters 1-10 of the second edition are also available. The use of the SHARPE software package may be very helpful as a pedagogic aid.