Performance of VoIP strategies for hybrid Mobile Ad Hoc Networks

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Last decade, a lot of research has been done in wireless communication technologies. Mobilenodes such personal digital assistants (PDAs), notebooks and cell phones are nowadays usedin human’s daily life.MANETs are networks consisting of two or more mobile nodes equipped with wirelesscommunication and networking capabilities, but they don’t have any network centrilizedinfrastructure.In last few years, MANETs have been emerged to be an important researched subject in thefield of wireless networking.MANETs are autonomous; however they can communicate with other external networks suchthe internet. They are linked to such external networks by mobile nodes acting as gateways.This kind of networks is known as hybrid MANETs.Voice over Internet Protocol (VoIP), is a technology that allows you to make voice calls usinga Internet connection instead of a regular (or analog) phone line.The goal of this thesis is evaluate the performance of VoIP strategies for hybrid MANETs.Two different aspects are evaluated, the session establishment performance and the voicequality.Network Simulator 2 is used to run several simulations, two different applications are used torun voice simulations (Session Initiation Protocol and Exponential traffic generator). Weevaluate two different cases for voice traffics, voice calls between two MANET nodes andvoice calls between MANET nodes and external nodes.After running the simulations, there are some performance parameters which will reveal theresults. The key findings of the simulations are: adding gateways, number of voice t...