Perzeptuelle Qualität von VoIP in mobilen ad hoc Netzen.

Thomas Fichtel (2007): Perzeptuelle Qualität von VoIP in mobilen ad hoc Netzen. Diplomarbeit, Universität Salzburg

Voice over IP (VoIP) is the technology of transmitting voice conversations over IP based networks. The voice data flows over a general-purpose packet-switched network, instead of traditional dedicated, circuit-switched voice transmission lines. VoIP today is one of those emerging services which are revolutionising telecom industries. The increasing dispersal of VoIP involves in a rising demand for the evaluation of networks. Regarding this point we focus on the specific demands of a network to provide defined levels of quality of service (QoS) for VoIP. For that reason this thesis discusses the impairments on the quality of VoIP transmissions and it gives an overview of the stateof-the-art procedures for determining the perceptual VoIP quality. Furthermore this work gives an introduction to mobile ad hoc networks (MANET) with the focus on MANET routing protocols. Another part and parcel of this thesis is the influence of MANETs on the perceptual quality of VoIP. In this context a design of experiment for simulating MANETs to determine dominating effects on the perceptual quality of VoIP is presented. Finally analysis of measurement results with statistical methods like analysis of variance (ANOVA) are presented and discussed.