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QoE Workshop 2009-09-18
QoE Quantification & Feedback
Markus Fiedler, Blekinge Institute of Technology,Dept. of Computing (COM), Karlskrona, Sweden
Who we are
Seniors @ COM/CCS
• Markus Fiedler• Patrik Arlos
• Lars Lundberg
Senior @ ING• Hans-Jürgen Zepernick
Ph.D. students @ COM/CCS
• Charlott Eliasson• Alex Popescu• Tahir Nawaz Minhas• Junaid Shaikh• Hussein Aziz
Ph.D. students @ ING• Ulrich Engelke et al.• .
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Our current QoE-related projects
• QoEMoVi/QoEMoS – mobile video/streaming• QoEWeb – user patience (Euro-NF)
– Testbed available
• Mobicome – authentication• EViMonA – seamless communication• PERIMETER – seamless communication• Euro-NF
– IA.7.5 workshop on socio-economic issues
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Recent and upcoming activities
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Areas of interest
• Real-life QoE assessment (new)• QoE–QoS relationships
– How to quantify QoE as function of QoS?
– dQoE/dQoS ~ QoE exponential function• Improvement of QoE
– Cross-layer approaches– Choice of networks (seamless communications)– Service chains– QoE feedback
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Some recent ”exponentials” for surfing
• Download time T ~ a1 exp(b1 L) L = loss ratio
• Throughput R ~ a2 exp(–b2 L)
• QoE ~ a3 – b3 L or QoE ~ a4 exp(–b4 L)
• QoE ~ a5 exp(– b5 T) or QoE ~ a6 – ln(b6 L)
• QoE ~ a7 + b7 ln(R)
QoE feedback
• In case of problems
• Mostly implicit– Organised?– Trustworthy?
• Origin: workwithin EuroNGI[D.WP.JRA.6.1.1]
IBP NetworkISP Network
Server
ASPUser
App.App.
ISP Network
NSP
Mgm.App.
A2 U
3
U2
N1
A1
N2
Mgm.App.
NSP
Mgm.App.
U1
N3
(N2)
A3
A4
S1
UserU4
8
… and its importance [HP study 2000]
• Understanding that there’s a lot of people coming together on the process makes us more tolerant
• I think it’s great...saying we are unusually busy, there may be some delays, you might want to visit later. You’ve told me now. It I decide to go ahead, that’s my choice.
• As long as you see things coming up it’s not nearly as bad as just sitting there waiting and again you don’t know whether you’re stuck
Specific topic: QoE feedback
• Towards users– When? How? Effects? Trust?
• Towards providers/regulators– When? How? Use? Economics?
• From the user (end)– When? Where? How?
Implicit? Explicit? Physiological?
• Economic feedback– Interest? Basis? Instruments? Misuse?
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Questions and Discussion
QoE Quantification & Feedback
Markus Fiedler, Blekinge Institute of Technology,Dept. of Computing (COM), Karlskrona, Sweden
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