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Falko Dressler, "An Approach for QoS Measurements in IP Multicast Networks, MQM - Multicast Quality Monitor," Proceedings of International Network Conference (INC 2002), Plymouth, United Kingdom, July 2002.


MQM - Multicast Quality Monitor represents a new approach to measure QoS within an IP multicast environment. Existing tools stop at measuring some packet loss ratio or some reachability by producing there own low-rate measurement data streams. History has shown that there are a lot of interesting parameters to measure some multimedia transmissions such as one-way-delay, round-trip-time, packet-loss-ratio and others. Also, in a multicast environment, existing tools built for unicast measurements fail because of the very different communication model. The MQM tries to fill this gap by introducing methods as well as tools for reliability and QoS measurements. In discussion are the most common problems such as the measurement of delays requires synchronized clocks and, much more important in the multicast environment, the scaling problem. Having a large number of measurement probes distributed over the network communicating to each other and measuring various QoS values using IP multicast results in some kind of flooding and overloading the network. Shown are approaches to minimize this effect as well as to examine really required parts of the network only. Having in mind the reason for all the tests, the applications or services, also included is a short presentation of a model for multicast networks as well as the used services which builds a very basis for the measurements.

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Falko Dressler

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    author = {Dressler, Falko},
    title = {{An Approach for QoS Measurements in IP Multicast Networks, MQM - Multicast Quality Monitor}},
    address = {Plymouth, United Kingdom},
    booktitle = {International Network Conference (INC 2002)},
    month = {7},
    year = {2002},

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