Network emulation focusing on QoS-Oriented satellite communication

This chapter proposes network emulation basics and a complete case study of QoS-oriented Satellite Communication

Towards an unified experimentation framework for protocol engineering

The design and development process of complex systems require an adequate methodology and efficient instrumental support in order to early detect and correct anomalies in the functional and non-functional properties of the solution. In this article, an Unified Experimentation Framework (UEF) providing experimentation facilities at both design and development stages is introduced. This UEF provides a mean to achieve experiment in both simulation mode with UML2 models of the designed protocol and emulation mode using real protocol implementation. A practical use case of the experimentation framework is illustrated in the context of satellite environment

Emulation de réseaux au niveau IP pour l'expérimentation de services et de protocoles de communication. Application aux réseaux satellites

Dans le cadre de l’évaluation de protocoles, plusieurs techniques sont utilisées : l’expérimentation en environnement réel, la simulation et l’émulation. Dans cette thèse, l’approche d’émulation est étudiée car elle permet la mise en oeuvre d’applications ou de protocoles réels dans un environnement contrôlable dont les caractéristiques (bande passante, délais, pertes) reproduisent en temps réel le comportement d'un réseau cible pour étudier et comparer différents protocoles et applications. Cette thèse proposera des techniques basées sur le couplage d’approches telles que la métrologie ou la simulation pour reproduire efficacement et de manière flexible le comportement de différents types de réseaux. Au cours de ce travail, nous avons participé à différents projets (DIPCAST et EuQoS) pour l’émulation de contexte satellite, et proposés une architecture d’émulation pour un lien satellite DVB-RCS ainsi qu’une méthodologie d’émulation pour l’émulation de réseaux à qualité de service. ABSTRACT : In the context of protocol evaluation, several solutions are used: live tests, simulation and emulation. We focus on network emulation which allows the use of real applications or protocol implementations in a controllable environment. For this purpose, several characteristics (bandwidth, delay, losses) allow the real time reproduction of a target network behavior. In this thesis, we propose solutions based on metrology and simulation to reproduce in a flexible but efficient way the behavior of different network types such as the satellite one. We were involved in several projects (DIPCAST and EuQoS) for emulation of a satellite environment and we proposed an architecture for emulating the DVB-RCS satellite link. A methodology for quality of service network is also proposed

Active emulation of a DVB-RCS satellite link in an end-to-end QoS-oriented heterogeneous network

Our contribution aims to propose a platform integrating an emulation processor and potentially complex emulation model into an easy-to-deploy system

Émulation de réseaux au niveau IP pour l'expérimentation de services et protocoles de communication (application aux réseaux satellites)

Dans le cadre de l'évaluation de protocoles, plusieurs techniques sont utilisées : l'expérimentation en environnement réel, la simulation et l'émulation. Dans cette thèse, l'approche d'émulation est étudiée car elle permet la mise en oeuvre d'applications ou de protocoles réels dans un environnement contrôlable dont les caractéristiques (bande passante, délais, pertes) reproduisent en temps réel le comportement d'un réseau cible pour étudier et comparer différents protocoles et applications. Cette thèse proposera des techniques basées sur le couplage d'approches telles que la métrologie ou la simulation pour reproduire efficacement et de manière flexible le comportement de différents types de réseaux. Au cours de ce travail, nous avond participé à différents projets (DIPCAST et EuQoS) pour l'émulation de contexte satellite, et proposé une architecture d'émulation pour un lien satellite DVB-RCS ainsi qu'une méthodologie d'émulation pour l'émulation de réseaux à qualité de service.In the context of protocol evaluation, several solutions are used : live tests, simulation and emulation. We focus on network emulation which allows the use of real applications or protocol implementations in a controllable environment. For this purpose, several characteristics (bandwidth, delay, losses) allow the real time reproduction of a target network behavior. In this thesis, we propose solutions based on metrology and simulation to reproduce in a flexible but efficient way the behavior of different network types such as the satellite one. We were involved in several projects (DIPCAST and EuQoS) for emulation of a satellite environment and we proposed an emulation architecture for emulation of a DVB-RCS satellite link. A methodology for quality of service network is also proposed.TOULOUSE-ENSEEIHT (315552331) / SudocSudocFranceF

MITV, a solution for interactive TV based on IP multicast over satellite

Television is the most popular audiovisual application ever used. The technological headways in digital transmissions allow new interactive services to complement classical Television broadcasts. However, the solutions available need specific infrastructures often making them hard and costly to deploy. MITv is a proposition for interactive television to be deployed using association of current distribution television systems (e.g., satellite DVB-S, cable DVB-T, TV over xDSL, etc.) and classical Internet infrastructure. MITv makes use of the natural association between broadcasted TV programs and associated interactive contents to manage replication of those contents over an ad-hoc infrastructure. The replication phase can be based on IP Multicast over satellite service, providing a high performance and realistic way to convey the interactive content over the geographically distributed replication units. The proximity between replication units and end-users then allow a very high quality for interactive media presentation by the way of an access network such as xDSL. The MITv system was entirely developed and tested in real conditions through a satellite/xDSL network emulator