[25 May 2015] A master student at RTSLAB was awarded the best thesis
award from IDA - Klervie Toczé. more ...
[26 May 2014] A bachelor student at RTSLAB was awarded the best thesis
award from IDA - Simon Andersson. more ...
[31 May 2012] A masters student at RTSLAB was awarded the best thesis
award from IDA - Ulf Magnusson. more ...
[27 February 2008] A masters student at RTSLAB was awarded the best thesis
award from IDA - Johan Sigholm. more ...
[03 March 2004] A masters student at RTSLAB was awarded the best thesis
award from IDA - Tobias Chyssler. more ...
[01 Jul 2003] For second year in a row a masters student at RTSLAB was awarded the best thesis
award from SNART - Mehdi Amirijoo. more ...
Master Thesis - Past Projects - Abstract
Implementation of a Delay-Tolerant Routing Protocol in the Network Simulator NS-3
Small mobile devices with networking capabilities are becoming more and
more readily available and used. These devices can be used to form mobile
ad hoc networks to communicate, where no infrastructure for network
communication exist or where it has been destroyed or is overloaded e.g. in
a natural disaster such as a hurricane. Such networks are almost never
fully connected, and are part of the category of delay/disruption-tolerant
networks (DTN) and suffer from limited resources e.g. bandwidth, storage
and limited energy supply. The Opportunistic DTN Routing With Window-aware
Adaptive Replication (ORWAR) is a delay-tolerant protocol intended to be
used in disaster relief efforts or emergency operations were a DTN could be
a fast way to establish communication. In these kinds of scenarios high
success rate together with efficient usage of the networks resources are
critical to the success of such operations. ORWAR has been implemented and
simulated on a high-level simulator, with promising results. To make a
better assessment about what ORWARs performance would be in a real world
network, more realistic and detailed simulations are needed. This Masterís
Thesis describes the design, implementation and evaluation of ORWAR in the
network simulator ns-3, which simulates networks down to physical layer.
The contributions of this thesis is a extension to ns-3 giving it an
framework with support for the bundle protocol and delay-tolerant routing
protocols and an evaluation of the ORWAR performance using more detailed
simulations. The simulations represent a city scenario in down-town
Helsinki city, Finland, were pedestrians, cars and trams form a network to
communicate. The simulations with a higher level of detail has added to
insight about the protocol. The obtained results showed that the high-level
simulation may be overly optimistic and hides implementation details. On
the other hand, some assumptions were found to be too pessimistic. For
example we have shown that ORWAR actually performs better than the high
level simulations, with regard to partial transmissions and that the
high-level simulations have rather optimistic assumptions regarding the
latency. The performance studies on the protocol follow the general trends
shown in the high-level simulations although with lower but more realistic
results. Moreover, the high level implementation has hidden the fact that
ORWARs signalling messages needs a more careful implementation.
File: Click here to download/view the thesis
Author(s): Fredrik Herbertsson
Contact: Simin Nadjm-Tehrani
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