Browsing by Author "Fesci-Sayit, Muge"

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Citation - WoS: 1
Citation - Scopus: 1
An Efficient Jsd-Based Search on Interest-Based Hierarchical Clustering of Overlay Networks
(Iaria Xps Press, 2010) Bulut, Hasan; Yardimci, Asil; Demirci, Sercan; Kaymak, Yagiz; Fesci-Sayit, Muge; Tunali, E. Turhan
In P2P networks, peers share contents, especially video files, which represent their interests. However, the underlying P2P topology may not represent this interest distribution. Thus, one important aspect of constructing an efficient P2P network is to exploit the interest similarity among peers. In this paper, we propose a hierarchical clustering mechanism for constructing an overlay network that takes interest similarity among peers into account. By measuring the similarity among interests of peers and clusters, interest-based hierarchical clusters are formed by using Jensen-Shannon Divergence metric. The clustering performance metrics, accuracy and correctness, are reported on PlanetLab. For limited keyword collections, a novel Jensen-Shannon Divergence-based search mechanism is implemented. It has been observed that the integrated mechanism provides an efficient method and better performance as compared to classical keyword-based search.
Citation - WoS: 9
Citation - Scopus: 10
Resilient Peer-To Streaming of Scalable Video Over Hierarchical Multicast Trees With Backup Parent Pools
(Elsevier, 2012) Fesci-Sayit, Muge; Tunali, E. Turhan; Tekalp, A. Murat
This paper introduces a new cross layer tree-based peer-to-peer design using hierarchical cluster layers and a new method for selection of backup parent pools for resilient streaming of scalable video to provide highest quality of experience for all peers. Backup parent pools are selected during the process of multicast tree construction based on information provided by the hierarchical clusters. The proposed tree construction method aims to minimize bottlenecks that may be caused by non-leaf nodes with low upload bandwidth. Performance of the proposed system is demonstrated by extensive test results using a wide range of simulation scenarios. Comparison of the results with those of some recent works indicates that the proposed system is clearly superior in several aspects. (C) 2011 Elsevier B.V. All rights reserved.