Project: Pushing the Frontiers of Communication Network
Telesim project is a collaborative research project
aimed at the modeling, simulation and analysis of advanced
communication networks. Dr Brian Unger and Dr Rob Simmonds
of the University of Calgary lead the development of
high performance tools to study complex networking scenarios.
This work includes the design of algorithms and implementation
techniques for fast parallel simulation engines as well
as parallel ATM network and IP network simulators. Simmonds
and Unger are also innovators in the area of network
emulation, which allows applications to interact with
each other over virtual networks in real time.
technology is becoming ever more pervasive and it is
difficult to predict the demands that will be placed
on broadband communication networks in the future. Simulation
is one of the few tools available to study the impact
of new protocols, applications and usage trends. Unger
and Simmonds have been major contributors to this area
and, in particular, they are world leaders in the development
of algorithms for the parallel execution of low granularity
systems such as Internet simulators. To perform research
in this area it is crucial to have access to current
high performance technical computing equipment such
as that provided by MACI.
simulation is the ideal tool for studying many systems,
some Internet applications are difficult to model in
a simulator. In particular, it is difficult to capture
the dynamics of interactive use. To respond to this
challenge, TeleSim has pioneered the area of parallel
network emulation, providing a new kind of tool for
testing distributed applications under controlled conditions.
Network emulation fuses real and virtual networks, permitting
real applications to interact in the controlled environment
provided by a simulator. In the future, network emulation
has the potential to become a standard tool for developing
Telesim research group credits much of their success
to the MACI high performance computer resources available
to support their work. Unger and Simmonds state that
the ability to obtain exclusive access to the four-processor
SMP computers at the University of Calgary is invaluable
for the development and testing of their parallel systems.
The Telesim group also has access to larger computers
in Edmonton enabling the testing of scalability properties
access to state of the art equipment will be central
to the future success of this research. Computational
infrastructure like MACI plays an integral part in maintaining
network communication advances of this caliber.
Bradford, R. Simmonds & B. Unger. Packet reading
for Network Emulation, submitted to MASCOTS 2001.
Kiddle, R. Simmonds, D. Wilson & B. Unger. ANML:
A Language for Describing Networks, submitted to
Gomes, B. Unger, R. Simmonds & J.C. Cleary. Memory
State Logging and Restoration, submitted to the
on Computer Systems, 2001.
Unger, Z. Xiao, J. Cleary, J. Tsai & C. Williamson,
Parallel Shared-Memory Simulator Performance for
Large ATM Network Scenarios, in press, ACM TOMACS,
Lu, R. Simmonds, Z. Xiao, B. Unger and C. Williamson.
The Performance of TCP over ATM on Lossy ADSL Networks,
LCN 2000, Tampa, November 2000.
Bradford, R. Simmonds and B. Unger. A Parallel Discrete
IP Network Emulator, Proc. of the 8th International
Modeling, Analysis and Simulation of Computer and Telecom
San Francisco, August 2000.
Doerksen, R. Simmonds and B. Unger. Modeling Resource
in Healthcare Systems, SCS Multiconference, San
Diego, January 2000.