Mirja Kühlewind

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Data Center TCP (DCTCP) is an Explicit Congestion Notification (ECN)-based congestion control and Active Queue Management (AQM) scheme. It has provoked widespread interest because it keeps queuing delay and delay variance very low. There is no theoretical reason why Data Center TCP (DCTCP) cannot scale to the size of the Internet, resulting in greater(More)
Explicit Congestion Notification (ECN) is an TCP/IP extension to signal network congestion without packet loss, which has barely seen deployment though it was standardized and implemented more than a decade ago. On-going activities in research and standardization aim to make the usage of ECN more beneficial. This measurement study provides an update on(More)
Low Extra Delay Background Transport (LEDBAT) is a new, delay-based congestion control algorithm that is currently under development in the IETF. LEDBAT has been proposed by BitTorrent for time-insensitive background traffic that otherwise would disturb foreground traffic like VoIP or video streaming. During previous evaluations the so called late-comer(More)
Explicit Congestion Notification (ECN) is a TCP/IP extension that can avoid packet loss and thus improve network performance. Though standardized in 2001, it is barely used in today’s Internet. This study, following on previous active measurement studies over the past decade, shows marked and continued increase in the deployment of ECNcapable servers, and(More)
Integrating realistic behavior of end systems into simulations is challenging since the mechanisms used in protocols and applications such as Transmission Control Protocol (TCP) are complex and continuously evolving. In this paper, we present VMSimInt, a new approach which allows the INTegration of arbitrary Operating Systems (OSs) and application code into(More)
In today’s Internet we see an increasing deployment of middleboxes. While middleboxes provide in-network functionality that is necessary to keep networks manageable and economically viable, any packet mangling – whether essential for the needed functionality or accidental as an unwanted side effect – makes it more and more difficult to(More)
Multipath TCP (MPTCP) is an experimental protocol currently under standardization in the IETF. MPTCP allows to use multiple TCP connections for one data transmission if at least one of the endpoints is multi-homed. For example, this can be a mobile device with a Wifi and a 3G interface. It is assumed that the paths are disjoint or partly disjoint. As such(More)