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(This page describes your use of OPNET's software for
academic research and teaching. Follow the
links at the bottom of the page to view a sample and download the
template. Modify the content in the body of the page to reflect your
use of the software)
University: Paris XI
Name of sponsoring Professor: Khaldoun Al Agha
Department: Computer science
Research:
Ph.D. students of our
research group use Opnet in order to study the performance of their
propositions.
They analyze the WCDMA capacity
performance. Propositions are focused on the WCDMA code allocation.
It provides a new method of multiplexing services of
several users. The PN-sequences are allocated to services and OVSF
codes are assigned to users. Results of simulation were provided to
enhance the analytical model.
They also study performances of
routing protocol in ad hoc networks (MANET). Works were published in
many conferences
Published paper show by simulation
(Opnet) the performance evaluation of our propositions.
Teaching:
Opnet is used in final year
projects by students that apply for an engineering diploma. The
projects consist in simulating cellular networks and apply resource
allocation scheme in both TDMA and CDMA context.
In 2000, two projects were proposed: guard channel scheme and call
admission control scheme in GSM networks.
In 2001, two projects were proposed: RACH random access in WCDMA and
CPCH random access in WCDMA. [download the report (in french)]
In 2002, only one project was
proposed to model a cellular network.
In
2003, one project was proposed: Mobile IP. Download the model and the report (in french).
Class
Syllabus:
We intend to
develop several courses with OPNET
1) Be familiar with OPNET editors (3 hours):
This lesson offers to students some hours to travel within all OPNET
interfaces and editors. It consists to open and navigates through the
different existing models developed by OPNET (ATM, IP routers, etc.).
2) Following the OPNET Tutorial (6 hours):
This lesson offers to students sufficient time to make some amusements
with examples well explained by the OPNET tutorial. They try to follow
step by step the tutorial instructions to construct their first model
in OPNET. Of course, all details are executed and explained:
constructing the model, probes, statistics, analysing graphs, making
simulations, etc.
3) Doing a generic cellular model by using sub-queue
OPNET facilities (3 hours)
This lesson asks students to construct a cellular model by using
sub-queue OPNET facilities. A cell is represented by a sub-queue and
owns its geographical coordinates by means of two variables. Mobile
stations are represented by packets encapsulated in their cells
(sub-queues). When a handoff occurs, the packet that represents the
mobile will move from one sub-queue to another.
4) Final project (two months)
Students are invited to simulate and study the performance of an ad-hoc
network.
Progress reports:
The simulation of our proposed model in the WCDMA resource allocation
was published in VTC2001.
Here you can find a PDF version
of the paper.
In ad-hoc networks we were simulate a scalable model to study the
performance of OLSR and Fast OLSR routing protocol. The model can
accept up to 100 000 nodes. A routing protocol with QoS requirement was
also applied. The model was published in MWCN 2002. Here you can find a PDF version of the paper.
Since January 2003, we are working
on a QoS routing protocol for ad hoc Networks (QOLSR). This protocol
can find dynamic routes from a source to a destination based on
bandwidth and delay metrics.
You can find information on QOLSR
on the URL: http://qolsr.lri.fr/
You can download a paper published in MWCN2003 describing the
protocol and also the OPNET source code
to simulate the model.
You can download models provided
by undergraduate students and Ph.D. students for respectively simulate
WCDMA code allocation and GSM resource allocation.
You can also download the OLSR and
FAST OLSR model.
WCDMA
and OSSC (One Service One
Scrambling Code)
GSM
RACH
and CPCH
OLSR and
FAST OLSR
Manet and QOLSR
OLSR (RFC 3626)
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