Type of Document Dissertation Author Lin, Tao Author's Email Address email@example.com URN etd-03262004-144048 Title Mobile Ad-hoc Network Routing Protocols: Methodologies and Applications Degree PhD Department Electrical and Computer Engineering Advisory Committee
Advisor Name Title Midkiff, Scott F. Committee Chair DaSilva, Luiz A. Committee Member Davis, Nathaniel J. IV Committee Member Jacobs, Ira Committee Member Koelling, Charles Patrick Committee Member Keywords
- Connected dominating set
- Relay node set
- Mobile Ad-hoc Network
Date of Defense 2004-03-19 Availability unrestricted AbstractA mobile ad hoc network (MANET) is a wireless network that uses multi-hop peerto-
peer routing instead of static network infrastructure to provide network connectivity.
MANETs have applications in rapidly deployed and dynamic military and civilian systems.
The network topology in a MANET usually changes with time. Therefore, there are
new challenges for routing protocols in MANETs since traditional routing protocols may
not be suitable for MANETs. For example, some assumptions used by these protocols are
not valid in MANETs or some protocols cannot efficiently handle topology changes.
Researchers are designing new MANET routing protocols and comparing and improving
existing MANET routing protocols before any routing protocols are standardized
using simulations. However, the simulation results from different research groups
are not consistent with each other. This is because of a lack of consistency in MANET
routing protocol models and application environments, including networking and user
traffic profiles. Therefore, the simulation scenarios are not equitable for all protocols and
conclusions cannot be generalized. Furthermore, it is difficult for one to choose a proper
routing protocol for a given MANET application.
According to the aforementioned issues, my Ph.D. research focuses on MANET
routing protocols. Specifically, my contributions include the characterization of differ-
ent routing protocols using a novel systematic relay node set (RNS) framework, design
of a new routing protocol for MANETs, a study of node mobility, including a quantitative
study of link lifetime in a MANET and an adaptive interval scheme based on
a novel neighbor stability criterion, improvements of a widely-used network simulator
and corresponding protocol implementations, design and development of a novel emulation
test bed, evaluation of MANET routing protocols through simulations, verification
of our routing protocol using emulation, and development of guidelines for one to choose
proper MANET routing protocols for particular MANET applications.
Our study shows that reactive protocols do not always have low control overhead,
as people tend to think. The control overhead for reactive protocols is more sensitive
to the traffic load, in terms of the number of traffic flows, and mobility, in terms of link
connectivity change rates, than other protocols. Therefore, reactive protocols may only
be suitable for MANETs with small number of traffic loads and small link connectivity
change rates. We also demonstrated that it is feasible to maintain full network topology
in a MANET with low control overhead. This dissertation summarizes all the aforementioned
methodologies and corresponding applications we developed concerning MANET
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