Author: Darius Bufnea

published in Proceedings of the KEPT 2013 – Knowledge Engineering Principles and Techniques Conference, Studia Universitatis Babeş-Bolyai, Volume LVIII, No. 3, pp. 78-89, 2013. Cite as

Full paper A Server-Side Support Layer for Client Perspective Transparent Web Content Migration… Continue Reading →

published in Proceedings of the KEPT 2009 – Knowledge Engineering Principles and Techniques, Studia Universitatis Babeş-Bolyai, Special Issue 2009, Volume II, pp. 288-291, July 2009. Cite as

Full paper New Data Mining Techniques for Macroflows Delimitation in Congestion Control… Continue Reading →

This paper presents an overview of the current web client – web proxy – web server mechanism and takes a deep look into one of its main disadvantages: the replication, in the proxy’s cache, of web objects having different URL but the same content. This problem is known as the Duplicate Transfer problem and is mainly caused by the current mode of indexing web objects based on their URL, which is used as a primary key in the cache repository. We present in this paper a statistical analysis based on real traffic measurements, which shows that more than 10% of a proxy’s cache consists of replicated objects, grabbed from the Internet in a useless manner and stored redundantly at least twice. These results urge the development of a scalable real-life solution to the duplicate transfer problem: some solutions have been previously proposed, but never deployed on a large scale in Internet. Continue Reading →

This paper presents a new approach for shared bottlenecks detection from a receiver’s perspective. This approach uses flow clustering at the receiver, based on passive observations of inter-packet arrival time intervals. We also suggest a new cost function useful in the flows clusterization process into macroflows. The proposed method can be used in the discovery of path patterns or for extending the macroflow granularity in an improved Congestion Manager. Continue Reading →

published in Proceedings of the Knowledge Engineering Principles and Techniques Conference, KEPT 2007, Cluj-Napoca, pp. 227-235, June 2007. Cite as

Full paper Some Formal Approaches for Dynamic Life Session Management Authors Florian Boian, Darius Bufnea, Alexandru Vancea, Adrian Sterca,… Continue Reading →