Doru Constantinescu

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The paper reports on recent developments and challenges focused on multimedia distribution over IP. These are subject for research within the research project ”Routing in Overlay Networks (ROVER)”, recently granted by the EuroNGI Network of Excellence (NoE). Participants in the project are Blekinge Institute of Technology (BTH) in Karlskrona, Sweden,(More)
In recent years, Internet has known an unprecedented growth, which, in turn, has lead to an increased demand for real-time and multimedia applications that have high Quality-of-Service (QoS) demands. This evolution lead to difficult challenges for the Internet Service Providers (ISPs) to provide good QoS for their clients as well as for the ability to(More)
The main goals of the paper are towards an understanding of the delay process in best-effort Internet for both non-congested and congested networks. A dedicated measurement system is reported for delay measurements in IP routers, which follows specifications of the IETF RFC 2679. The system is using both passive measurements and active probing. Dedicated(More)
A novel measurement system is reported for delay measurements in IP routers, which follows specifications of the IETF RFC 2679. The system employs both passive measurements and active probing and offers the possibility to measure and analyze the One-Way Transit Time (OWTT) in routers as well as different delay components of a router, e.g., packet processing(More)
This chapter is concerned with the impact of traffic correlations on the end-to-end delay of packets in a chain of IP routers represented by an open tandem queueing system. Particular consideration is given to Kleinrock’s independence assumption on the performance impact of traffic correlation on packet switched networks with Poisson arrival processes and(More)
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