Title page for ETD etd-08072005-194426

Type of Document

Master's Thesis

Author

Aia, Mahesh ,

Author's Email Address

mahesh_aia@yahoo.com

URN

etd-08072005-194426

Title

Directed Waypoint Model: A Hybrid Approach to Realistic Mobility Modeling in Mobile Ad-hoc Networks

Degree

Master of Science

Graduate Program

Computer Networking

Advisory Committee

Advisor Name	Title
Dr. Mihail L. Sichitiu	Committee Chair
Dr. Rudra Dutta	Committee Member
Dr. Yannis Viniotis	Committee Member

Keywords

mobility modeling
MANETs
MANET routing protocols
detailed simulation frameworks
stochastic mobility models
simulation modeling
spatial and temporal dependencies
performance evaluation

Date of Defense

2005-08-05

Availability

unrestricted

Abstract

Researchers are highly dependent on simulations to compare and evaluate
the performance of Mobile Ad-hoc networking protocols. Mobility modeling plays a very important role in simulation-based studies of MANET protocols, since the mobility of nodes is the limiting factor in the performance of such protocols. Currently, simulations of MANET protocols rely on simplistic, purely stochastic models such as the random waypoint. These models do
not reflect the motion of real world MANET nodes, which may be deployed in
diverse scenarios. At the present time, the only available alternative to these models is fine-grained detailed simulations based on extensive surveys of actual node behavior, or extensive sets of real world traces. This work proposes an alternative hybrid
mobility model that extracts scenario-specific information from real traces
and generates realistic node movements for particular scenarios. The distinguishing features of our model are
its ability to reproduce spatial-temporal node movement properties from sample traces and its general
adaptability to traces from any real-life scenario. We develop a framework for our model and apply it to reference traces from several realistic scenarios. The hybrid model is then evaluated
for accuracy by comparing the performance of
MANET routing protocols using random waypoint with realistic parameters and our model against
the original reference traces used by our model. The results show the relevance of accounting for spatial and temporal
aspects of node movements in mobility models.

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