An Experimental Investigation of VoIP and Video Streaming over Fixed WiMAX

Kostas Pentikousis, Jarno Pinola, Esa Piri, Frerk Fitzek

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    22 Citations (Scopus)


    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.
    Original languageEnglish
    Title of host publication2008 6th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks and Workshops
    Place of PublicationGermany
    PublisherIEEE Institute of Electrical and Electronic Engineers
    ISBN (Print)978-963-9799-18-9
    Publication statusPublished - 2008
    MoE publication typeA4 Article in a conference publication


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