Dissertation Defenses

Doctoral Dissertation Announcement

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Candidate: Ghassen Ben Brahim

Degree of: Doctor of Philosophy

Department: Computer Science

Title: A New Model for Cooperative Mobility and Budgeted Constrained QoS in MANETs with Heterogenous Autonomy Requirements

Committee:
Dr. Moshen Guizani, Chair
Dr. Ala Al-Fugaha
Dr. Dionysios Kountanis
Dr. Bilal Khan

Date: Tuesday, May 15, 2007 10:00 a.m. – 12:00 p.m.
CEAS D-210

Abstract:
Modern mobile ad-hoc networks (MANETs) frequently consist of nodes which exhibit a wide range of autonomy needs. This is particularly true in the settings where MANETs are model compelling, i.e. battlefield, response & rescue, and contexts requiring rapid deployment of mobile users. The time-critical nature of the underlying circumstances frequently requires deployment of both manned and unmanned nodes, and a coordination structure which provides prioritized tasking to them.
In classic ad-hoc networks settings, it is assumed that all nodes are autonomous and do not depend in any case on other nodes. In this research work, contrarily to this design, we propose introducing the notion of cooperation between nodes which results in a new design of an ad-hoc network: non-autonomous ad-hoc network. In such network, mobile nodes are classified into two classes: cooperative versus non-cooperative nodes. Cooperative nodes behave in such a way that they can either adjust their locations within the network based on pre-assigned movement budget, and/or switch to different radio frequency channel during data transmission in case of cognitive radio capable mobile nodes. The goal of this proposed cooperative model is to improve the overall network performance by providing better Quality of Services (QoS). The QoS parameter considered in this work is the Bit Error Rate (BER) of the wireless channel, which is a good metric that accurately represents the wireless channel conditions.