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Presents 2005 IMTC Forum

Presents 2005 IMTC Forum. Lessons learned from the death of videoconferencing – Bringing it back to life by user centric QoE guidelines expressed in QoS-parameters. Presented by Bjørn Hestnes Telenor R&D. QoS?. What is QoS?. How it is defined:

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Presents 2005 IMTC Forum

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  1. Presents 2005 IMTC Forum

  2. Lessons learned from the death of videoconferencing – Bringing it back to life by user centric QoE guidelines expressed in QoS-parameters Presented by Bjørn Hestnes Telenor R&D

  3. QoS? IMTC Forum – May 2005 – Eibsee, Germany

  4. What is QoS? How it is defined: “the collective effect of service performance, which determines the degree of satisfaction of a user of the service” (E.800) How it is used: • Network oriented, packed switched for real-time applications • UDP IP (User Datagram Protocol) • Delay, Delay jitter, Packet loss, Burst packet loss++ • Bandwidth? IMTC Forum – May 2005 – Eibsee, Germany

  5. QoS Is: • Technical oriented • Difficult to relate to • Packet loss of 4 % • Is this term really of help? IMTC Forum – May 2005 – Eibsee, Germany

  6. How wrong can it go?Examples from the past IMTC Forum – May 2005 – Eibsee, Germany

  7. IMTC Forum – May 2005 – Eibsee, Germany

  8. IMTC Forum – May 2005 – Eibsee, Germany

  9. IMTC Forum – May 2005 – Eibsee, Germany

  10. IMTC Forum – May 2005 – Eibsee, Germany

  11. The history is repeating itself Same problems in: • 1960 • 1970 • 1980 • 1990 • 2000 IMTC Forum – May 2005 – Eibsee, Germany

  12. Another example from daily life IMTC Forum – May 2005 – Eibsee, Germany

  13. Different time Same time Same place Different place Different groupware(ref R Johansen 92) Archive, library Conference room Surfing, e-mail, VoD Telephony, videoconferencing Which area is most time critical? IMTC Forum – May 2005 – Eibsee, Germany

  14. Participants arrive at agreed time They have an agenda to og through If something goes wrong, they will not come through their agenda Very irritating! Timecritical applications 14 IMTC Forum – May 2005 – Eibsee, Germany

  15. User-perceived QoSUser-based QoSFitness-for-PurposeQuality of Experience (QoE) User perceived reliablility includes: • Technical reliability • User errors If something brakes down, the users have a need for: • Instant support • Whatever the error is!!! IMTC Forum – May 2005 – Eibsee, Germany

  16. Fixed Group Complex UI Poor(er) user perceived reliability Tradition of unreliability Everything i implemented Extreme quality (ie large screens) Mobile Individual Simple UI Better user perceived reliability Tradition of reliability Very simple implementation Poor quality (ie small screens) Differences in use IMTC Forum – May 2005 – Eibsee, Germany

  17. QoE IMTC Forum – May 2005 – Eibsee, Germany

  18. Who are there for you? IMTC Forum – May 2005 – Eibsee, Germany

  19. Who are there for you? • ITU • SG 12 • ETSI • TC HF • STF 284 • What can they help you with? IMTC Forum – May 2005 – Eibsee, Germany

  20. European Telecommunication Standards Institute (ETSI) Technical Bodies IMTC Forum – May 2005 – Eibsee, Germany

  21. ETSI Specialist Task Force (STF) on Human related technical guidelines for real-time person-to-person communication services • STF 284 • Starts now • Ends Feb 2007 • Deliverables • ETSI Guide • web-based tutorial system • ETSI Technical Report IMTC Forum – May 2005 – Eibsee, Germany

  22. Guideline Derivation Guideline #1 Guideline #n Guidelines IF ---------- USING ---------- WITH ---------l THEN ---------- IF ---------- USING ---------- WITH ---------l THEN ---------- IF ---------- USING ---------- WITH ---------l THEN ---------- Intermediate Guidelines Base Knowledge Units Test result #1 Test result #2 Test result #n Base knowledge IMTC Forum – May 2005 – Eibsee, Germany

  23. General Intermediate Format IMTC Forum – May 2005 – Eibsee, Germany

  24. Service Prescription Service Prescription IMTC Forum – May 2005 – Eibsee, Germany

  25. Technical Parameters Technical Parameters IMTC Forum – May 2005 – Eibsee, Germany

  26. User Behaviour User Behaviour IMTC Forum – May 2005 – Eibsee, Germany

  27. GuidelineDerivation Guideline #1 Guideline #n Guidelines IF ---------- USING ---------- WITH ---------l THEN ---------- IF ---------- USING ---------- WITH ---------l THEN ---------- IF ---------- USING ---------- WITH ---------l THEN ---------- Intermediate Guidelines Base Knowledge Units Test result #1 Test result #2 Test result #n Base knowledge IMTC Forum – May 2005 – Eibsee, Germany

  28. IMTC Forum – May 2005 – Eibsee, Germany

  29. Example of intermediate Guideline Videoconferencing with 650ms delay for sales negotiation can reduce results for the buyer (compared with videoconferencing with no delay) • IF negotiation • USING videoconferencing • WITH 650ms delay • THEN poorer result for the buyer (compared with no delay) IMTC Forum – May 2005 – Eibsee, Germany

  30. GuidelineDerivation Guideline #1 Guideline #n Guidelines IF ---------- USING ---------- WITH ---------l THEN ---------- IF ---------- USING ---------- WITH ---------l THEN ---------- IF ---------- USING ---------- WITH ---------l THEN ---------- Intermediate Guidelines Base Knowledge Units Test result #1 Test result #2 Test result #n Base knowledge IMTC Forum – May 2005 – Eibsee, Germany

  31. Example Guideline Topic : Asynchrony 500ms asynchrony in remote inspection works well Justification: Remote inspection with 500 ms asynchrony for giving advice on a procedure does not affect task performance (compared with remote inspection with no delay) IMTC Forum – May 2005 – Eibsee, Germany

  32. Example Guideline Topic : Screen resolution QCIF works as well as CIF on a small screen Justification: Videoconferencing with 3,5 inch screen and QCIF resolution for negotiation can result in no significant difference in task outcome (compared with videoconferencing with 3,5 inch screen and CIF resolution) IMTC Forum – May 2005 – Eibsee, Germany

  33. Current guideline topics IMTC Forum – May 2005 – Eibsee, Germany

  34. Dissemination process IMTC Forum – May 2005 – Eibsee, Germany

  35. Dissemination process • For whom? • End users (about)? • ”Administrators”: Impersonating result users • Real result users    IMTC Forum – May 2005 – Eibsee, Germany

  36. Identified result users • Network Providers • Strategic Network Planner • Sales Person • Market department • System integrators • Equipment Manufacturers • Development engineer • Support • Market, Sales • Service Providers IMTC Forum – May 2005 – Eibsee, Germany

  37. IMTC Forum – May 2005 – Eibsee, Germany

  38. Distinct Working Styles to Acquire Knowledge Lean-back & Think Lean-forward & Explore IMTC Forum – May 2005 – Eibsee, Germany

  39. What can it be used for? IMTC Forum – May 2005 – Eibsee, Germany

  40. What can it be used for? • Setting thresholds/levels in a test situation • How good is ”good enough” • Sales support: Help customers in investing in the right equipment for them • A reference to standard’s work IMTC Forum – May 2005 – Eibsee, Germany

  41. Conclusion IMTC Forum – May 2005 – Eibsee, Germany

  42. How can technical QoS parameters be expressed as a measure of QoE? • 500ms asynchrony in remote inspection works well • QCIF works as well as CIF on a small screen • End results: • ETSI Guidelines • Tutorial web system • ETSI report, requirements for future work • ETSI publications that can be refered to IMTC Forum – May 2005 – Eibsee, Germany

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