Cross Layer Optimization for Protocols in Mobile Adhoc Networks

Table of Contents

CHAPTER 1 : Introduction

1.1 Mobile Adhoc Networks

1.2 Important Issues

1.3 MAC Protocols

1.4 Routing Protocols

1.4.1 Routing Protocol Strategies

1.4.1.1 Proactive strategy

1.4.1.2 Reactive strategy

1.4.1.3 Hybrid strategy

1.4.2 Destination Sequenced Distance Vector (DSDV) Routing

1.4.3 Adhoc On Demand Distance Vector (AODV) Routing

1.4.4 Dynamic Source Routing (DSR)

1.4.5 Temporally Ordered Routing Algorithm (TORA)

1.5 Cross Layer Design in Mobile Adhoc Networks

1.6 Motivation for the Thesis

1.7 Problem Definition

1.8 Objectives

1.9 Contributions of the Thesis

1.10 Organization of the Thesis

CHAPTER 2 : Wireless MAC, Routing and Cross layer Protocols

2.1 Wireless MAC Protocols

2.1.1 IEEE 802.11b Standard

2.1.2 RTS-CTS-DATA-ACK four way handshake Protocol

2.1.3 Minimum Transmit Power Control Protocols

2.2 Quality of Service Routing

2.2.1 Quality of service in Adhoc Networks

2.2.1.1 Special Issues and Difficulties in MANETS

2.2.1.2 Hard state versus soft state resource reservation

2.2.1.3 Stateful versus Stateless approach

2.2.1.4 Hard QoS versus Soft QoS approach

2.2.2 Classification of QoS Approaches

2.2.3 QoS Models

2.2.3.1 IntServ

2.2.3.2 DiffServ

2.2.3.3 IntServ over DiffServ

2.2.3.4 FQMM

2.2.4 Related Work

2.3 Cross Layer Design

2.3.1 Layered vs Cross Layered approach

2.3.2 Motivations for cross layer design

2.3.3 Cross Layer Protocols

CHAPTER 3 : Link Availability Model

3.1 Link Prediction

3.1.1 Link Prediction Algorithm

3.2 Simulation and Results

3.2.1 Simulation Parameters

3.2.2 Performance Metrics

3.2.3 Simulation Results and Analysis

3.2.3.1 CBR Simulations

3.2.3.2 Energy Simulations

3.2.3.3 TCP Simulations

3.3 Summary and Future Work

CHAPTER 4 : Dynamic Power Control wireless adhoc MAC Protocol

4.1 Dynamic Power Control wireless adhoc MAC Protocol

4.1.1 Proposed Protocol Basics

4.1.2 Model Description

4.1.3 Proposed Protocol Description

4.1.4 Proposed Protocol Algorithm

4.2 Simulation and Results

4.2.1 Simulation Parameters

4.2.2 Performance Metrics

4.2.3 Results and Analysis

4.3 Summary and Future work

CHAPTER 5 : Cross Layer Design for Power Control and Link Availability

5.1 Cross Layer Power Control and Link Availability Prediction

5.1.1 Power Control

5.1.2 Link Availability

5.1.3 Proposed Protocol Algorithm

5.2 Simulation and Results

5.2.1 Simulation Parameters

5.2.2 Performance Metrics

5.2.3 Simulation Results and Analysis

5.3 Summary and Future Work

CHAPTER 6 : Conclusion and Future Work

Bibliography

Objectives and Topics

This thesis focuses on improving the performance and quality of service (QoS) in Mobile Adhoc Networks (MANETs) by addressing the challenges of limited battery life, node mobility, and unpredictable network topology. The primary objective is to develop cross-layer optimization protocols that predict link availability and dynamically manage transmit power to enhance network stability and energy efficiency.

• Development of an analytical model for link availability prediction using the Newton divided difference method.
• Modification of the AODV routing protocol to incorporate predictive link-state information (AODVLP).
• Design of a Dynamic Power Control (DPCP) MAC protocol to optimize battery consumption through RTS-CTS-DATA-ACK handshake modifications.
• Integration of power control and link prediction into a comprehensive cross-layer design (DPCPLP).
• Performance evaluation using the ns-2 network simulator, focusing on throughput, packet delivery ratio, end-to-end delay, and energy consumption.

Excerpt from the Book

Chapter Summaries

CHAPTER 1 : Introduction: Provides an overview of MANETs, discusses standard routing protocols, and outlines the motivation for implementing cross-layer design to improve network performance.

CHAPTER 2 : Wireless MAC, Routing and Cross layer Protocols: Details existing MAC and routing protocols, with a specific focus on power-aware mechanisms and various QoS approaches for adhoc environments.

CHAPTER 3 : Link Availability Model: Introduces the novel link prediction model using the Newton divided difference method and presents simulation analysis of the modified AODV (AODVLP) protocol.

CHAPTER 4 : Dynamic Power Control wireless adhoc MAC Protocol: Describes the design and performance evaluation of the proposed DPCP protocol, aimed at minimizing energy usage and maximizing throughput.

CHAPTER 5 : Cross Layer Design for Power Control and Link Availability: Explains the integrated DPCPLP design that combines link prediction and dynamic power control, demonstrating performance improvements over non-cross-layer approaches.

CHAPTER 6 : Conclusion and Future Work: Summarizes the thesis contributions and suggests future research directions, such as evaluating these methods under real-time traffic conditions or incorporating transport layer congestion control.

Keywords

Mobile Adhoc Networks, MANET, Cross Layer Optimization, Link Prediction, AODV, Dynamic Power Control, MAC Protocol, QoS, Energy Efficiency, Network Throughput, Newton Divided Difference, IEEE 802.11, NS-2, Link Availability, Wireless Communication

Frequently Asked Questions

What is the core problem addressed in this thesis?

The thesis addresses the challenges of frequent link failures, limited node battery life, and suboptimal routing performance in Mobile Adhoc Networks (MANETs) due to node mobility.

What are the key themes of the research?

The work focuses on cross-layer interaction, link availability prediction, power-aware MAC protocol design, and Quality of Service (QoS) improvement.

What is the main objective of the thesis?

The goal is to design and implement cross-layer solutions that reduce link failures and optimize power consumption to increase the overall lifetime and capacity of MANETs.

Which methodology is used to evaluate the proposed protocols?

The author uses the ns-2 network simulator to conduct extensive performance evaluations, comparing the proposed models (AODVLP, DPCP, DPCPLP) against existing standard protocols like AODV and IEEE 802.11.

What is covered in the main body of the work?

The main body covers link prediction modeling, power control MAC protocols, and the integration of these features into a unified cross-layer design for improved network stability and performance.

Which keywords best describe the research?

The work is best characterized by terms such as MANET, AODV, cross-layer optimization, power control, link prediction, and network performance evaluation.

How does the link prediction model function?

The model uses the Newton divided difference interpolation method to estimate when the received signal strength will fall below a defined threshold, allowing the system to predict a link break before it occurs.

What is the benefit of the proposed DPCPLP cross-layer design?

The DPCPLP design combines optimum transmit power management with predictive link maintenance, resulting in better throughput, lower energy consumption, and reduced communication interruption times.