University of Twente Student Theses


Modelleren en analyseren van een Ethernet switch

Groen, Ruud (2006) Modelleren en analyseren van een Ethernet switch.

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Abstract:The assignment falls in the @Home-Anywhere-project. The goal of the @Home-Anywhere research project is to integrate home appliances into one coherent distributed architecture. Part of the project is the development of a robust real-time network (RTnet). In the present situation the network uses a hub. With the increased usage of Ethernet switches in home networks the question has come up if it is possible to use an Ethernet switch in RTnet. The advantage of using an Ethernet switch is the possibility to send multiple streams at the same time. An Ethernet switch offers the possibility to connect similar network segments with each other. The real-time behaviour of a current Ethernet switch is determined by the chosen architecture and the chosen switching strategy. The time needed for sending a frame depends on the queue length in the switch. With the current architectures it is not possible to give hard real-time guarantees. To predict the behaviour of an Ethernet switch there are two possible theories: network calculus and stochastic models. Both models indicate the length of the queue inside an Ethernet switch by using the input and output flows. The difference is the complexity of the models. By comparing the results of the models with measurements, it appears it is possible to predict the length of the queue and the delay over an Ethernet switch. Therefore it is possible to use an Ethernet switch for the current RTnet. However, the advantages of using an Ethernet switch cannot be used. The behaviour of a switch makes it impossible to give a gurantee, due to the unknown precise architecture and other, manufacturer-dependent properties.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Computer Science MSc (60300)
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