EURESCOM Project P807 JUPITER 2

1. EURESCOM Project P807 JUPITER 2 AOS - Acceptability of Service Astrid Dehnel Deutsche Telekom Berkom Gmbh Goslarer Ufer 35, D-10589 Berlin Tel.: +49 30 34 97 23 86 FAX: +49 30 34 97 23 87 E-Mail: A.Dehnel@bekom.de

2. Our view to QoS - definitions of terms used The definition of Acceptability Concepts for Measuring User Acceptance of NQoS Examination of QoS and AoS within Jupiter 2 T4/T5 Overview about methods used Summary and outlook EURESCOM Project P807 Jupiter 2 Presentation Topics

3. Quality of Service (QoS):The collective effect of service performance which determines the degree of satisfaction of a user of the service. EURESCOM Project P807 Jupiter 2 QoS - a user related term (ITU-T Rec. E.800) • It is mentioned in a note to this definition that QoS is characterised by the combined aspects of • service support performance • service operability performance • serveability performance • service security performance

4. Network QoS (NQoS):The end-to-end characteristics offered by a network delivering data (between end-systems). Network performance (NP):The actual (measured) characteristics of the network – it’s ability to meet the offered Network QoS. EURESCOM Project P807 Jupiter 2 The network related aspects of QoS For the work within JUPITER 2 network related Tasks the term Network QoS as a part of QoS is defined as follows:

5. EURESCOM Project P807 Jupiter 2 Acceptability in the field of economics

6. EURESCOM Project P807 Jupiter 2 Acceptability of service (AoS) for telecommunications

7. Acceptability of Service (AoS): Multidimensional property of a service, describing how readily a customer will use the service, represented as the ratio of the number of potential users to the quantity of the target group. EURESCOM Project P807 Jupiter 2 Acceptability of service (AoS) for telecommunications The acceptance(Acceptance: Ratio of actual users in the target group) of an existing service can be measured easily counting the users of this service. However, a reference value – the quantity of the target group regarding the investigated service – has to be determined for evaluating the acceptability.

8. EURESCOM Project P807 Jupiter 2 Measurement points for quality aspects e.g. charge Measurement points of network QoS and user-experienced quality aspects affected by it.

9. EURESCOM Project P807 Jupiter 2 Task 4 / Task 5 Process 12 10 8 Upper e.g. Delay 6 Lower 4 2 0 Network Now Determine current Intranet characteristics for loss, delay and delay variation

10. EURESCOM Project P807 Jupiter 2 Task 4 / Task 5 Process 12 10 8 Upper e.g. Delay 6 Lower 4 2 0 Network Now User Requirements Using these initial values determine limits for users’ acceptance of the service

11. EURESCOM Project P807 Jupiter 2 Task 4 / Task 5 Process Use the network QoS technologies to achieve network performance that meets users’ requirements

12. How do we use these network building blocksto meet the Users’ Requirements? RSVP (Resource ReSeVation Protocol) RSVP over ATM IP Differential Services Winsock2 (support for native ATM and RSVP) Queuing technologies (Weighted Fair Queuing, etc) H.323 Gatekeeper Multimedia Conference Manager Subnet Bandwidth Manager IEEE802.1p EURESCOM Project P807 Jupiter 2 QoS Technologies under study

13. Simulated network with different parameters for: - delay - packet loss - delay variation EURESCOM Project P807 Jupiter 2 Used methodology for streaming video quality • Single stimulus presentation like ITU-T Rec. 920 • short, tightly controlled test sequences and longer natural test sequences • standard or realistic audio-, video- and audio-visual related task • pre-task questionnaire about quality and acceptance • pre-test questionnaire • 5-point category scale • Yes/No question for acceptance • 12 or more subjects e.g.NetShow Subject

14. Simulated network with different parameters for: - delay - packet loss - delay variation ( ) ( Subject 3) EURESCOM Project P807 Jupiter 2 Used methodology for conferencing service e.g.Netmeeting(H.323) e.g.Netmeeting(H.323) Hallo?I am Ann. ... Who are you ? I am fine ... ? e.g.Netmeeting(H.323) Subject 1 .... Subject 2

15. EURESCOM Project P807 Jupiter 2 Used methodology for conferencing service e.g.Netmeeting(H.323) • Interactive test like ITU-T Rec. 920 • subjects communicate each other • standard or realistic audio-, video- and audio-visual related task • pre-task questionnaire about quality and acceptance incl. charge • pre-test questionnaire • 5-point category scale for quality evaluation • Yes/No question for acceptance • 6 or more couple of subjects Hallo? ... Simulated network Subject 1 Who ..? I am... ? Subject 2

16. Quality Judgements for: Overall audio-visual quality Video quality Audio quality response time information loss Acceptability questions about: Overall audio-visual quality Video quality Audio quality EURESCOM Project P807 Jupiter 2 Users perception under study Also related to different charge. Also related to different charge.

17. EURESCOM Project P807 Jupiter 2 Summary and outlook Acceptability of service T5 T4 Quality of service Provided qualityOperating Company’s Point of View Perceived quality / Accepted qualityCustomer’s Point of View Measure Objective Parameters measured within the network Measure Subjective Parameters mapped to objective measures obtained from customer surveys Operators perception Customers perception Comparison, Analysis & Action plans

18. We have high expectations about the results and we hope our work will be accepted. EURESCOM Project P807 Jupiter 2 Summary