|| For the Spring semester 2004, the schedule of the monthly meetings and invited presentations at OpNeAR
Lab is the following (Please check again for updates):
Friday, February 20, 2004 - 4:00 pm - room ECSN 2.110 |
A General Purpose Simulator for Wireless and Sensor
Speaker: Puja Gupta
This presentation will give an overview of the sensor
network simulator that has been designed to study different
characteristics of sensor networks such as the access protocols, power
models and routing protocols. It is a general purpose, event driven
simulator that can also be used to study wireless and ad-hoc
networks. The presentation will include a brief overview of sensor
networks, details about the implementation, protocols for sensor
networks and future directions of work
Analysis of a Threshold-Based QoS Mechanism in a Multi-Class WDM Network |
Speaker: Sudhakar Pitchumani
One of the important QoS metrics in circuit switched WDM
networks is the connection blocking probability. Service classes with
different priorities have to be differentiated based on their blocking
probabilities. In this presentation, a new Threshold-Based mechanism
for providing QoS among connections with different priorities is
proposed. An analyical model for the proposed mechanism is developed
based on the celebrated Erlang's Reduced Load Approximation
method. The simulation results show that the proposed mechanism
differentiates service classes successfully and also agree well with
the results of the analytical model.
Friday, April 19, 2004 - 4:00 pm - room ECSN 2.110 |
Impact of OXC Failures on Network Reliability
Speaker: Zsolt Pandi
The presentation focuses on the impact of OXC equipment
failure on online end-to-end optical circuit provisioning in WDM networks.
A selection of representative OXC architectures combined with different
switching technologies is assessed with respect to their influence on
network level reliability.
At the node level, the equipment reliability is calculated using
proven component level reliability models that are tailored to
represent the selected OXC architectures. At the network level,
end-to-end optical circuits are provisioned using various levels of
reliability, thus providing network Differentiated Reliability. The
shared path protection (SPP) switching scheme is considered for best
resource-efficient service provisioning. Simulation results are used
to compare the selected OXC architectures in terms of both network
blocking probability of incoming circuit requests and OXC cost.
The results that will be presented will be published in the proceedings of
Photonics Europe conference to be held April 2004.
The LightRing - Evolution from simulations to hardware
Speaker: Prasanna Krishnamoorthy
The LightRing architecture, developed at the OpNeAR lab., is now into
the next stage of its evolution! After having been studied extensively,
though simulations and analytical models, the LightRing is going to be
implemented as a test network - with optics, electronics and software.
Multiple nodes are going to be built, with the optics and electronics
built in Brazil (CpqD), software and electronics design from UTD, and
middleware from Nortel.
This presentation will describe the goals, tasks to be done, and the
current status. This project has seen a large amount of collaboration
with technically and geographically diverse teams. We hope that the
lessons learnt will help improve future collaborations.
|© 2006. All rights reserved.
Open Networking Advanced Research Lab
Dept. of Electrical Engineering
The University of Texas at Dallas. USA.