Literature Database Entry


Falko Dressler, Monitoring of Multicast Networks for Time-Synchronous Communication, Arbeitsberichte des Instituts für Informatik, vol. 36/4, Erlangen, Germany, Institut für Informatik, 2003.


The internet is increasingly used for the transmission of multimedia content. Real-time applications such as video conferences and TV broadcasts are in the center of attention thereby. The development and the implementation of IP multicast is the basis for a meaningful use of these new services. Additionally, a minimum quality of service is necessary for the transmission of high quality multimedia data. Unfortunately, IP multicast is still a complex and fault-prone technology. Only a few ISPs are capable to deploy these techniques in a correct and stable manner. Furthermore, far few or no mechanisms are implemented in the large backbone networks, which offer or even guarantee a higher quality of service than the typical best effort behavior of IP networks. It is one of the most important tasks to develop tools for monitoring multicast networks. The objective of such tools is to estimate the reliability of a particular network connection as well as the measurement of the currently available quality of service. In the context of this work, a new concept is being described which allows the measurement of the reliability and of the quality of service in distributed multicast networks. Attention is paid to the scalability of this specification. In order to ensure this scalability new mechanisms are developed which allow the measurement even in really large and distributed environments. It has been turned out that the measurement methods as well as the optimal distribution of the measurement stations are closely coupled to the objective, the guarantee of the function and of the quality of particular multicast services. In the present work, these mentioned aspects are examined. A new model is being specified which integrates information about the available network infrastructure as well as about the most important multicast services. Based on the modeled data an implemented routing algorithm can be used to identify the parts of the network which are used by the active and by the scheduled multicast services respectively. Additionally, it provides information about the required measurements of an optimal estimation of the achievable quality of service. In conclusion it was possible to define and to test a framework which complies with the mentioned goals. Based on prototypical implementations the functionality is tested in a lab environment as well as in real networks.

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Falko Dressler

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    author = {Dressler, Falko},
    title = {{Monitoring of Multicast Networks for Time-Synchronous Communication}},
    location = {Erlangen, Germany},
    publisher = {Institut f{\"{u}}r Informatik},
    series = {Arbeitsberichte des Instituts f{\"{u}}r Informatik},
    volume = {36/4},
    year = {2003},

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