Research Article
An Experimental Investigation of VoIP and Video Streaming over Fixed WiMAX
@INPROCEEDINGS{10.4108/ICST.WIOPT2008.3234, author={Kostas Pentikousis and Jarno Pinola and Esa Piri and Frerk Fitzek}, title={An Experimental Investigation of VoIP and Video Streaming over Fixed WiMAX}, proceedings={4th International ICST Workshop On Wireless Network Measurement}, publisher={IEEE}, proceedings_a={WINMEE}, year={2008}, month={8}, keywords={Delay effects Delay lines Loss measurement Streaming media Synchronization Testing Throughput Topology Traffic control WiMAX}, doi={10.4108/ICST.WIOPT2008.3234} }- Kostas Pentikousis
Jarno Pinola
Esa Piri
Frerk Fitzek
Year: 2008
An Experimental Investigation of VoIP and Video Streaming over Fixed WiMAX
WINMEE
IEEE
DOI: 10.4108/ICST.WIOPT2008.3234
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 offthe- 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-ofsight (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 oneway delay measurements with those obtained when GPS-based synchronization is used.