Kostas Pentikousis

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Publication Details

K. Pentikousis, J. Pinola, E. Piri, and F. Fitzek, "An Experimental Investigation of VoIP and Video Streaming over Fixed WiMAX", in Proc. 6th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks and Workshops (WiOPT), Berlin, Germany, March 2008, pp. 8-15.

Abstract—Despite the significant interest in WiMAX technology and deployment, there are very few publicly reported measurements from testbeds and field trials. As such, most WiMAX studies employ simulation and modeling. This paper contributes to our understanding of what is realistically possible using off-the-shelf fixed WiMAX equipment today. We employ multiple competing traffic sources over a point-to-multipoint WiMAX topology and measure the capacity of the WiMAX equipment to handle a multitude of VoIP flows between subscriber stations while delivering a variable number of video streams. We measure throughput, packet loss, and one-way delay for both line-of-sight (LOS) and non-line-of-sight (NLOS) conditions. For the one-way delay measurements we synchronize the clocks of all testbed hosts with a software-only, open source implementation of the IEEE 1588 Precision Time Protocol. We compare these one-way delay measurements with those obtained when GPS-based synchronization is used.
Full paperpdf, IEEE Xplore
Conference web site
TagsTraffic measurements and analysis
Project—WEIRD (6/2006-5/2008). More »

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Last updated: 22.11.2009