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Title Voice over IP measurements
Author Ruscior, Radu Dudici
Supervisor Pedersen, Steen (Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Sharp, Robin (Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Master's thesis
Year 2002
Abstract The Quality of Service is very important for any user, related to Voice over IP or any other multimedia application. This thesis presents a solution to develop a tool able to measure this parameter in order to detect upcoming bottleneck problems for a future installation of a VoIP system and to troubleshoot existing VoIP systems. The tool's name is VIPSim. VIPSim is meant to be used to provide extensive information about performance, capacity and problems in an H.323 network. It is also used for alarms, planning and documentation. The thesis is structured in 7 sections: Section 1 presents the general problem of QoS in a VoIP system and shows a possible solution, which is VIPSim. Section 2 presents the architecture of VIPSim. It describes the two components of VIPSim, which are the Sender and the ReÛector. It also shows what VIPSim does and how it does (referring to measurements). It addresses to users of VIPSim in systems troubleshootings. Section 3 goes deeper into VIPSim's implementation, describing its internal design as well as the description of the implementation of some important operations. It addresses to programmers and developers. Section 4 describes some aspects regarding optimizations that were used in VIP-Sim's implementation. This section also gives the reader ideas about some algorithms used in VIPSim's implementation. Section 5 shows tests and results obtained from measurements done with VIP-Sim. Some of them are meant to determine VIPSim's limitations and requirements. Section 6 contains general conclusions. Section 7 contains a glossary with terms used in this thesis, and some VoIP terminology.
Imprint Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU : DK-2800 Kgs. Lyngby, Denmark
Keywords VoIP; Packets; Round Trip Delay; H.323; Jitter; Network; Measurements; Calls
Fulltext
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Admin Creation date: 2006-06-22    Update date: 2012-12-19    Source: dtu    ID: 58340    Original MXD