EURESCOM Project P807 JUPITER 2

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EURESCOM Project P807 JUPITER 2
AOS - Acceptability of Service

• Astrid Dehnel
• Deutsche Telekom Berkom Gmbh
• Goslarer Ufer 35, D-10589 Berlin
• Tel. [phone]
• FAX [phone]
• E-Mail A.Dehnel_at_bekom.de

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EURESCOM Project P807 Jupiter 2
Presentation Topics

• 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

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QoS - a user related term
EURESCOM Project P807 Jupiter 2

• Quality of Service (QoS) The collective effect
  of service performance which determines the
  degree of satisfaction of a user of the service.

(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

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The network related aspects of QoS
EURESCOM Project P807 Jupiter 2
For the work within JUPITER 2 network related
Tasks the term Network QoS as a part of QoS is
defined as follows

• 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 its ability to
  meet the offered Network QoS.

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Acceptability in the field of economics
EURESCOM Project P807 Jupiter 2
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Acceptability of service (AoS) for
telecommunications
EURESCOM Project P807 Jupiter 2
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Acceptability of service (AoS) for
telecommunications
EURESCOM Project P807 Jupiter 2
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.

• 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.

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Measurement points for quality aspects
EURESCOM Project P807 Jupiter 2
e.g. charge
Measurement points of network QoS and
user-experienced quality aspects affected by it.
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Task 4 / Task 5 Process
EURESCOM Project P807 Jupiter 2
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10
8
Upper
6
e.g. Delay
Lower
4
2
0
Network Now
Determine current Intranet characteristics for
loss, delay and delay variation
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Task 4 / Task 5 Process
EURESCOM Project P807 Jupiter 2
12
10
8
Upper
6
e.g. Delay
Lower
4
2
0
Network Now
User
Requirements
Using these initial values determine limits for
users acceptance of the service
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Task 4 / Task 5 Process
EURESCOM Project P807 Jupiter 2
Use the network QoS technologies to achieve
network performance that meets users requirements
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QoS Technologies under study
EURESCOM Project P807 Jupiter 2

• How do we use these network building blocks to
  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

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Used methodology for streaming video quality
EURESCOM Project P807 Jupiter 2

• 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
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Used methodology for conferencing service
EURESCOM Project P807 Jupiter 2
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
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Used methodology for conferencing service
EURESCOM Project P807 Jupiter 2
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
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Users perception under study
EURESCOM Project P807 Jupiter 2

• 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

Also related to different charge.
Also related to different charge.
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Summary and outlook
EURESCOM Project P807 Jupiter 2
Acceptability of service
T5
T4
Quality of service
Perceived quality / Accepted qualityCustomers
Point of View
Provided qualityOperating Companys 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
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Summary
EURESCOM Project P807 Jupiter 2

• We have high expectations about the results and
  we hope our work will be accepted.