Measuring WCDMA and HSDPA delay characteristics with QoSMeT

Jarmo Prokkola, Mikko Hanski, Marko Jurvansuu, Milla Immonen

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

    46 Citations (Scopus)

    Abstract

    Quality of Service (QoS) is becoming increasingly important with the rise of multimedia applications (e.g., voice over IP (VoIP), video conferencing, online gaming, and Internet Protocol Television (IPTV)) in public data networks. These applications demand real-time service, while the networks should still be able to transfer also other traffic reliably (e.g., data, e-mail, WWW). We have developed a measurement tool, which is able to measure one-way QoS performance statistics. The tool enables passive monitoring of the desired application(s) and gives information about the QoS provided by the network. The tool can be used practically over any kind of network structure as long as IP is supported. In this paper, we focus on detailed end-to-end delay characteristics measured in live HSDPA (High Speed Downlink Packet Access) enabled 3G network. HSDPA provides clearly better de-lay performance than the basic WCDMA (Wideband Code Division Multiple Access). Interestingly, deterministic long time behavior in delay was observed, and also, discrete jitter levels were found. With argumentation, and finally with a trial, we proved that these phenomena originate from the CBR-type (Constant Bit Rate) VoIP source traffic affecting with 3G network timing mechanisms and mutual clock drifts. As a side product, the study also showed that it is advisable to verify the operation of traffic generation tools before using them.
    Original languageEnglish
    Title of host publicationProceedings of the IEEE International Conference on Communications, ICC 2007
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Pages492–498
    ISBN (Print)1-4244-0353-7
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA4 Article in a conference publication
    Event2007 IEEE International Conference on Communications, ICC'07 - Glasgow, Scotland, United Kingdom
    Duration: 24 Jun 200728 Jun 2007

    Conference

    Conference2007 IEEE International Conference on Communications, ICC'07
    CountryUnited Kingdom
    CityGlasgow, Scotland
    Period24/06/0728/06/07

    Keywords

    • Passive measurements
    • real-time
    • Quality of Service
    • 3G
    • performance
    • VoIP

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