Includes references (103-108 p.)

'ABSTRACT A MANET is an autonomous collection of digital data terminal devices wgich contain wireless transceivers able of communicating with each other without using any fixed topology. In general, routing protocols are divided into three categories: Reactive Routing Protocol, Proactive Routing Protocol and Hybrid Routing Protol. This thesis is intended to evaluate the perfomance of three routing protocols; the reactive AODV, DSR routing protocols and the proactive OLSR routing protocol. Also two different application definitions were used under those three routing protocols; which are: HTTP heavy browsing, HTTP light browsing and GSM Voice application. To determine the appropriate type of routing protocols for Mobile Ad Hoc Networks (MANETs) still remains difficult because some of the routing protocols have better perfomance in some cases and have worse in others depanding on the size, number of nodes and applications of the network. On the other hand, selecting different parameter metrics are helpful to increase the perfomance of the network. To analyse the perfomance of the three routing protocols AODV, DSRand OLSR routing protocols OPNET Modeler version 14.5 was used. In this thesis, various parameter matrics were used for perfomance comparison analysis and evaluation of of Quality of Service (QoS) of AODV, DSRand OLSR protocols which involve time average, End -to -End Delay, Wireless LAN Throughput, Network Load in addition to Voice Jitter and Mean Opinion Score (MOS) for Voice Traffic. The experimental results are given with graphical representations. Three different network size of 25, 50, and large scale 75 mobile nodes were used in twenty-seven different scenarios. From the simulation results of all scenarios, DSR has got the worst choice between two other routing protocols (AODV and OLSR) under HTTP heavy browsing and HTTP light browsing and Voice Traffic in MANET scenarios. On the other hand, best are AODV and OLSRprotocols. In medium and large networks, OLSR is better as compared to AODV and DSR routing protocols in terms of delay, network load, Voice Jitter and MOS. The perfomance of OLSR is better choice for small and large networks. After simulating all the matrices we can conclude that OLSR protocol is better as compared to AODV and DSR routing protocols in terms of delay, network load, jitter and MOS. '

1 CHAPTER ONE: INTRODUCTION AND BACKGROUND INFORMATION

3 Introduction

3 Background of MANETs

5 Review of Manets Characteristics

6 Some of the Problem Definitions

8 The Aims of the Thesis

9 Related Work

12 Thesis Oulines

CHAPTER TWO: ROUTING PROTOCOLS IN MANETS

13 Routing Protocols in Metals

13 Classification of Routing Protocols in Manet

14 Proactive Routing Protocols

15 Reactive Routing Protocols

16 Hybrid Routing Protocols

16 Challenges Faced Routing in Mobile Ad-Hoc Wireless Network

17 Security and Reliability

18 Scalability

19 The Quality of Service(QoS)

21 Energy Conservation

22 Medium Access Control Scheme

23 Hidden/Expose erminal

24 Data Throughput

24 Transport Layer Protocols

CHAPTER THREE: OVERVIEW OF OLSR, AODV AND DSR ROUTING PROTOCOLS

26 Brief Description of OLSR

27 Multipoint Relays(MPRs)

28 Multipoint Relays(MPRs) Selection

29 Control Messges

30 Neighbor Discovery

31 Topology Information

31 MPR Selection Example

32 Advantages

32 Disadvantages

33 Overview of (AODV)

33 Route Dicovery in AODV

34 Routing Table Management

35 Routing Maintenance in AODV

36 Hello Messages in AODV

36 Link Breakage

37 Local Repair in AODV

37 AODV EXAMPLE

38 AODV Advantages

38 AODV Disadvantages

39 Overview of DSR

40 Route Discovery in DSR

42 Route Maıntenane in DSR

43 Route Cache

44 Advantages of DSR

44 Disadvantages of DSR

45 Summary of AODV, OLSR and DSR Routing Protocols

CHAPTER FOUR: PERFORMANCE EVALUATIONS AND DESIGN

49 Performance Metrics

49 End-To-End Delay

49 WLAN Throughput

50 Network Load

50 Voice Jitter

50 Mean Opinion Score(MOS)

51 Software Platform

52 Simulation Setup

54 Modeling Applications in OPNET

54 Application Configuration

55 HTTP Application Configuration

59 VOICE Application Configuration

62 Profile Configuration

63 Mobility Configuration

CHAPTER FIVE:RESULTS AND ANALYSIS

65 HTTP Simulation Results

65 End-to-End Delay of HTTP (Heavy and Light browsing)

71 Throughput of HTTP (Heavy and Light browsing)

77 Network Load

83 Voice Results

83 End-to-End Delay(Sec)

87 Network Load (Bits/Sec)

90 Throughput(Bits/Sec)

93 Voice Jitter(Sec)

96 Mean Opinion Score (MOS)

CHAPTER SIX:CONCLUSION AND FUTURE WORK

100 Conclusion

102 Future Works

103 REFERENCES

109 APPENDIX