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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

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… 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