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
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