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Quality of Service Studies in Telecommunication Laboratory

Explore groundbreaking studies on QoS in telecommunication laboratories, including projects like TeraBitti, PalHaLa, and WiMALE. Discover innovative technologies such as IPTV, WiMAX, and pricing-based scheduling. Benefit from advanced simulations and practical case studies in this evolving field.

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Quality of Service Studies in Telecommunication Laboratory

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  1. Quality of Service Studies in Telecommunication Laboratory Olli Alanen Telecommunication Laboratory 22.3.2007

  2. Projects • TeraBitti (1999-2004) - QoS in IP and MPLS networks • PalHaLa (2004-2006) – IPTV pilot network and related services were built • VizTool (2004-2006)– Prototype of future network management software • LaiLa (2006-2008) – Managing and monitoring of the new services in heterogeneous wireless networks • WiMALE (2005-…) – WiMAX MAC layer QoS studies in ns2 (Network Simulator 2)

  3. LaiLa / PalHaLa • IPTV Test Network with following services to digital set-top-boxes / televisions: • IPTV (possibility for free and pay channels) • Video-on-Demand (VoD) • Game Channels • Network PVR • WWW, e-mail, EPG, Billing, … • …

  4. IPTV Channels

  5. Game Servers

  6. Remote recording service

  7. VoD / Playback of recordings

  8. Pay channels

  9. Dynamic bandwidth regulation

  10. Nokia 770 Case • Linux Open Source library called Gstreamer was used to create a content adaptation server • MPEG2 IPTV-broadcast is transcoded to MPEG4 in real-time • Nokia 770 Linux PDA received the adapted stream using WLAN • This work is continuing currently and one MSc will be finalized about it on this year

  11. Nokia 770 Case

  12. VizTool IPTV Case

  13. Pricing based scheduling and classification • Simulator studies on ns2 and MatLab • Basic idea is to do scheduling decisions based on the revenue of the network operator • Each service class has its own cost function for bits and delay • Several PhD theses have been completed on the subject

  14. Pricing Based Scheduling

  15. Pricing Based Scheduling

  16. WiMAX QoS Studies • We have implemented WiMAX (802.16) to ns2 simulator • Most (the important ones) of the MAC layers functionalities • Some PHY level issues • Our research is concentrated on the WiMAX QoS • WiMAX can support strict QoS requirements on MAC level • Features, such as: • Scheduler / scheduling of the service classes • Contention parameters • Polling issues • ARQ parameters • VoIP specialties • … are studied

  17. WiMAX QoS Studies • Currently only PMP mode is supported • Mesh-mode is in future plans • In co-operation with Nokia Research Center since 2005 • Conference and journal articles have been wrote • Also MSc and PhD theses on the subject are done

  18. Example simulation scenario • 30 VoIP connections • One background connection (Best Effort / TCP)

  19. Results • In this scenario static parameters and our adaptive method were compared to each others

  20. The end! Thank you!

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