Acknowledgement: This paper was written in the frame of the Project "Scientific Computing" sponsored by the Austrian National Science Foundation (FWF), project number SFB 1302. I would also like to thank M. Rosenkranz for helping me in the preparation of this manuscript.

In this paper, we study several TCP fairness issues in wireless local networks, both experimentally and via simulation. We illustrate the unfairness problems caused by the 802.11 MAC protocol, as well as by cross-layer interactions. Two possible solutions, namely SPM-AF queue management and LAS queue management, are proposed in the paper. These two queue management approaches are designed to al...

A connection between permutations that avoid 4231 and a certain queueing discipline is established. It is proved that a more restrictive queueing discipline corresponds to avoiding both 4231 and 42513, and enumeration results for such permutations are given.

Zusammenfassung Dieser Bericht beschreibt die Zielsetzung und aktuelle Ergebnisse des DFG-Sonderforschungsbereichs 501 „Entwicklung großer Systeme mit generischen Methoden“. Dem SFB liegt ein experimenteller Ansatz zugrunde, bei dem die Einzelergebnisse der Teilprojekte in gemeinsamen kontrollierten Experimenten und prototypischen Anwendungsentwicklungen empirisch untersucht werden. Summary Thi...

Teknologi TCP end-to-end congestion control hanya menangani kemacetan jaringan dari suatu host tetapi tidak pada atau intermediate network, oleh karena itu teknologi Active Queue Management (AQM) dikembangkan untuk mengantisipasi didalam yaitu router. AQM dapat mengatasi buffer overflow router dan mencegah terjadinya masalah sinkronisasi yang padat, dengan mendeteksi sebelum terjadi jaringan. R...

Packet scheduling and queue management strategies are key issues of DiffServ per-hop behaviours. This paper proposes a queue management system that, in conjunction with scheduling mechanisms, is able to support class differentiation. The general principles and the architecture of the queue management system are presented. The proposal is supported by a prototype that was subject to several test...

This paper mainly analyzes the algorithms and technology of congestion avoiding/controlling of active queue management that is applicable to the network processor, and discusses their performance criteria and technology features thoroughly. Then it proposes the method to protect and optimize TCP bandwidth by adopting several measures to the Internet routers, for example, active queue management...