TABLE OF CONTENT
LIST OF ACRONYM
CHAPTER 1
INTRODUCTION
1.1 BACK GROUND
1.2 PROBLEM DEFINITION
1.3 OBJECTIVES
1.4 SCOPE
1.5 DOCUMENT ORGANIZATION
CHAPTER 2
LITERATURE REVIEW
CHAPTER 3
SIMULATION SOFTWARE AND DESIGN IMPLEMENTATION
3.1 OMNET++
3.2 SYSTEM MODELING
3.2.1 The Ad Hoc Host Compound Module
3.2.2 The WirelessHost Compound Module
3.2.3 The Access point Compound Module
3.2.4 The configuration
3.2.5 Channel control
3.3 SIMPLE MODULE IMPLEMENTATION
3.3.1 DSDV Routing protocol Packet Modification
3.3.2 OLSR Routing Protocol Packet modification
3.4 CONFIGURING SIMULATION
3.5 PERFORMANCE METRICS USED
3.5 SCENARIOS USED
3.5.1 Open Manet with multiple gate way
3.5.2 Open Manet with single Gate way
3.5.3 Closed MANET
CHAPTER 4
RESULT ANALYSIS
4.1 PERFORMANCE OF DSDV USING THROUGHPUT
4.2 PERFORMANCE OF OLSR USING THROUGHPUT
4.3 PERFORMANCE OF DSDV USING PDR AS A PERFORMANCE METRICS
4.3 PERFORMANCE OF OLSR USING PDR AS A PERFORMANCE METRICS
CHAPTER 5
CONCLUSION AND RECOMMENDATION
5.1 CONCLUSION
5.2 RECOMMENDATION
REFERENCES
APPENDIX
Abstract
The existence of different kinds of wireless technologies enabled formation of two types of Mobile Ad hoc Networks (MANET). Homogeneous MANETwhere communication is entirely infrastructurless and Heterogeneous MANET where the network is composed of infrastructured and non-infrastructured Wireless Local Area Networks (WLANs). MANET use particular routing protocols designed to cope with the absence of central coordinator to route packets and can be classified as proactive and reactive.The control messages generated by each routing protocol vary which affects the size of the payload in a single transmission.
This Masters Thesisimplements two proactive routing protocols in homogeneous and heterogeneous environment and assesses the effect of packet size on the performance of the two environments and uses the reserved bits to signal that a node can be used as a gate way From the tests we showed the performance degradation for Destination Sequenced Distance Vector(DSDV) routing protocol interms of throughput is reduced about (8.7% - 10.5%) and for Optimized Link State Routing(OLSR) protocol (3.51% - 4.08%) as compared to to Ad hoc On Demand Distance Vector(AODV) routing protocol .Considering PDR as a performance metrics for DSDV the reduction is about (11.7% - 28.6%) and for OLSR(6.1% -10.4%) as compared to AODV.The environments have been developed using omnet++ simulator.
The findings show network performances increase as the packet size increase .In addition the presence of multigateway has positive correlation with network performance.
Chapter 1
Introduction
Advances in computing and communication technologies resulted in pervasive computing environment where future mobile communication will include both infrastructured wireless and Mobile ad hoc networks. A MANET is a collection of wireless nodes that can dynamically form a network to exchange information without existing fixed network infrastructures. The absence of fixed network infrastructure brings these technologies a great opportunities with severe challenges .This can be routing due to the dynamic nature of the environment and lead to the existence of different routing protocols to cope with this dynamic environment, Inter networking where coexistence of routing protocols of various environment is a challenge for the harmonious mobility management .Moreover,the amount of data in a packet and the composition of the header can change depending on the communications protocol and this networks use a store and forward mechanism the impact of the packet size must be carefully analyzed.
In this thesis we
· Observe the performance of proactive routing protocol degrades in heterogeneous environment as compared to the homogeneous environment
· Proposed a way of connecting mobile ad hoc networks with infrastructured wireless network and our method improved performance
1.1 Back ground
In 2020 it is estimated the number of interconnected devices will be more than 6-7 times than the number of people. This shows that the wireless arena has been experiencing exponential growth in the past decades and lead to advances in computing and communication technologies. This has created a pervasive computing environment and stared to change the way we live .To mention only a few examples Mobile users can rely on their mobile devices to check e-mail and browse the internet from different public locations and files or other information can be exchanged by connecting portable computers via wireless LANs while attending conferences...
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