ITU Workshop on “Monitoring and Benchmarking of QoS and QoE of Multimedia Services in Mobile Networks” (Buenos Aires, Argentina, 24-25 July 2014) Overview

ITU Workshop on “Monitoring and Benchmarking

of QoS and QoE of Multimedia Services in Mobile Networks”

(Buenos Aires, Argentina, 24-25 July 2014)

Overview of ITU-T Study Group 12 Recommendations on QoS and QoE

Joachim Pomy

[email protected], Germany

Buenos Aires – Argentina – 24 – 25 July 20142

SG 12 Recommendations

E.420-E.479, E.800-E.859G.100-series, except G.160-, G.180- and G.190-seriesG.1000-seriesI.350-series (including Y.1501/G.820/I.351), I.371, I.378, I.381P-series, except P.900-seriesY.1220-, Y.1530-, Y.1540-, Y.1560-serieshttp://www.itu.int/ITU-T/recommendations/index_sg.aspx?sg=12


Work Programme (1/8)

Coordination of QoS/performance studiesCommunications Quality of Service: A framework and definitionsVocabulary for performance and quality of serviceMean Opinion Score (MOS) terminologyTransmission characteristics for wideband digital handset and headset telephones - Inclusion of extended wideband terminalsTransmission characteristics for cordless and moblie digital terminalsTransmission characteristics for wideband digital loudspeaking and hands-free telephony terminals - Inclusion of extended wideband terminalsTechnical requirements and test methods for the universal wired headset or headphone interface of digital mobile terminalsNarrowband hands-free communication in motor vehiclesWideband hands-free communication in motor vehicles


P.800.1 Relation between some MOS qualifiers



User interface requirements for automotive applicationsSubsystem requirements for automotive speech servicesArtificial earsCalculation of loudness ratings for telephone setsUse of head and torso simulator (HATS) for hands-free and handset terminal testingBone conduction testing setupMultiple test positions setupSetups and testing techniques for terminal performance measurements with background noiseArtificial voicesSpeech processing devices for acoustic enhancementTransmission characteristics and speech quality parameters of hands-free terminals


Typical development cycle for a car speakerphone hands-free system and applicability of clauses of Rec. P.1100

P.1110(09)_F6-1

A sample B sample C sample D sample

Research end Pre-development end Dev. B sample end Dev. C sample end Dev. D sample end PPAP

SOP

Typically HFT development for a new car

Application of the different clauses of this Recommendation

Part 8 digital interface Part 8 digital interface

Parts 11 and 12 HFT and SRWTEP parameters

Part 13 subjective car-to-car test

Part 10 microphone parametersWhat is covered by the various parts of the test Recommendation?Part 7: Covers test arrangements used within this Recommendation.Part 8: Covers non-mandatory objective measurements using a digital interface.Part 9: Covers test signals used within this Recommendation.Part 10: Covers non-mandatory objective measurements of the microphone or/and microphone system.Part 11: Covers mandatory objective measurements of the hands-free terminal (HFT).Part 12: Covers non-mandatory objective measurements of short-range wireless transmission enabled phone (SRWTEP).Part 13: Covers non-mandatory subjective evaluation of the hands-free terminal (HFT).



Test signals for use in telephonometryObjective test methods for speech communication systems using complex test signalsMethods for determining the ‘Objective Quality Number’ as overall quality value for terminalsApplicability of psycho-acoustic models to HATS based setups for the benefit of terminal testingSetup signals for terminal with background noiseSubjective quality evaluation of telephone services based on spoken dialogue systemsSubjective performance of active signal processing devicesCultural/language/nationality dependence of subjective qualitySubjective evaluation of generic sound activity detectorsMultidimensional scaling quality assessmentSubjective assessment methods for music quality of narrowband and wideband telephony


Rating scales used in ITU-T P.806 subjective testing methodology

PQ Scales Description Scale Descriptors

Overall Scales

B-LVLDegradation due to the Level of

Background Noisehissing, rushing, roaring

P.MULTI Perceptual Quality Scales

S-FLTSlow-varying Degradation in the

Speech Signalfluttering, babbling,

discontinuous

S-RUF Fast-varying Degradation in the Speech Signal

rough, raspy, harsh

S-HFCDegradation of High-frequency Coloration in the Speech Signal

small, distant, thin

S-LFC Degradation of Low-Frequency Coloration in the Speech Signal

dull, muffl ed, smothered

Description

LOUD

OVRL

Overall Loudness in the Speech Signal + Background Noise

Overall Quality in the Speech Signal + Background Noise

B-VAR Degradation due to the Variability of the Background Noise

bubbling, intermittent, variable



Test methodology for web browsing and browser based applicationsSubjective usability evaluation of speech-based or multimodal interactive servicesQ.7/12 defines test plans for tests of speech coders, and reports the test results and analysisE-model extension for non-handset user interfacesE-model extension for speech processing devicesE-model update for conversational quality featuresMixed-band and beyond-wideband E-modelE-model for monitoringOperational quality estimatorPerceptual approaches for multi-dimensional analysisPerceptual objective noise reduction


Test setup for Rec. P.1501 Quality of web browsing



Perceptual Objective Prediction of Speech IntelligibilityNo-reference models for quality predictionSubjective method for simulated conversation tests addressing audio and audiovisual call qualityEffect of delays on the telemeeting qualityUse of auditory and visual cues for high-quality telemeetingsOverall telemeeting quality value (long term goal)Quality implications and requirements for telemeeting and conferencing servicesSpatial audio meetings quality evaluationFrequent updates of AppendicesQuality of Experience aspects of Multi ConnectionEnd-to-end QoE aspects of tandemmed speech processing devices


Rec. P.1301 Decision tree for Subjective quality evaluation

of audio and audiovisual multiparty telemeetings

P.1301(12)_FA

Communicationmode including text / graphics

(e. g., webconferencing) ?

Yes

ITU-T P.1301 Annex B

No

Audio

Audio-visual

VideoCommunicationmode?

ITU-T P.1301 Annex C

Test mode= audio

Audio VideoTestmode?

Test mode= video

Audio-visual

Type ofquality?

Type ofquality?

Type ofquality?

Non-inter-active

Conver-sational

Conver-sational

Non-inter-active

Continue withFlowchart B

Continue withFlowchart C

Continue withFlowchart D

Continue withFlowchart E

Special testmethod required

Continue withFlowchart F

Conver-sational

Non-inter-active

Start



End-to-end performance for managed voice over LTE networks This Recommendation describes the key aspects impacting end-to-end performance of managed voice applications over LTE networks.Definitions and associated measurement methods for user-centric parameters for call handling in cellular mobile voice serviceMobile QoSSupplement XX to ITU-T E.800-series Recommendations (Guidelines on Regulatory Aspects of QoS)End-user multimedia QoS categoriesNetwork model for evaluating multimedia transmission performance over Internet ProtocolOpinion model for video and audio streaming applicationsQoE of Web-browsingQoE requirements for multicast video streaming servicesQoE requirements for telepresence servicesGuidance for the use of P.1201 and P.1202 in operational contexts


Rec. G.1010 – Model for user-centric QoS categories

T1213060-02

FaxErrortolerant

Conversationalvoice and video

Voice/video messaging

Streaming audioand video

Errorintolerant

Command/control(e.g. Telnet,

interactive games)

Transactions(e.g. E-commerce,WWW browsing,

Email access)

Messaging,Downloads

(e.g. FTP, still image)

Background(e.g. Usenet)

Interactive(delay <<1 s)

Responsive(delay ~2 s)

Timely(delay ~10 s)

Non-critical(delay >>10 s)



QoE-diagnostic information from P.120X.Y type models on technical causes of QoE impairmentsIntegral index of quality for general service monitoring (per user-session); KQI definitionsMedia-session QoE model (temporal pooling, long sequences; UDP- and TCP-based streaming)Parametric non-intrusive assessment of audiovisual progressive download, considering stalling/re-buffering & quality integrationParametric non-intrusive assessment of TCP-based multimedia streaming quality, considering adaptive streamingIn-service non-intrusive measurement device – Voice service measurementsAnalysis and interpretation of INMD voice-service measurementsConformance testing for voice over IP transmission quality assessment modelsConversational modelFramework for invoking diagnostic functionsVoice Service Diagnosis Framework


Rec. G.1029 - Voice Service Diagnosis Framework

Framework for mapping diagnostic parameters to root-cause parameters (Work Item 2)

Framework for invoking diagnostic functions (Work Item 1)

QoE/QoS Diagnostic parameters

QoE/QoS Root-cause analaysis

application

QoE/QoS Decision

parameters

Decision process

Diagnostic parameter to root-cause mapping

Invocation

QoE/QoS Root-cause

analysis parameters

Remedial action

network

Terminals



Technical cause analysisBuffer models for development of client performance metricsHand-over performance among multiple access networksInternet protocol data communication service – IP packet transfer and availability performance parametersNetwork performance objectives for IP-based servicesMeasurements in IP networks for inter-domain performance assessmentEthernet frame transfer and availability performanceEthernet service activation test methodologyHome network performance parametersProposed Appendices for Y.1566 : QoS mapping and interworking between Ethernet, IP and MPLS


Cannot find your Topic ?

Work in ITU-T is contribution driven !Next Meeting of Study Group 12

2 – 11 September 2014 in Cartagena de Indias, Colombia (tbc)Deadline for Contributions

20 August 2014http://www.itu.int/net/ITU-T/ddp/Default.aspx?groupid=T13-SG12


Any questions ?

Joachim [email protected]

Documents

ITU Workshop on “Monitoring and Benchmarking of QoS and QoE of Multimedia Services in Mobile Networks” (Buenos Aires, Argentina, 24-25 July 2014) Overview