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Quality of service

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Mateusz Mądry

on 30 April 2014

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Transcript of Quality of service

Quality of Service
in IP networks
for non-real-time services

Tomasz Pieściuk
Mateusz Madry

List of contents
Why is QoS so significant? - Introduction
QoS - another required term?
QoS - different points of view
QoS - classification
What are non-real-time services?
Division of non-real-time services
Network parameters?
Proposals of requirments for non-real-time services:
First proposal of requirements for non-real-time services
(Research of Arizona State University)
Second proposal of requirements for non-real-time services
(Recommendation ITU-T Y.1551)
Third proposal of requirements for non-real-time services
(Recommendation ITU-T G.1010)
Summary
Bibliography
Quality of Service - general term?
The collective effect of service performance which determine the degree of satisfaction of a user of Service
Quality of Service - classification?
Intrinsic QoS
Technical aspects
Perceived QoS
Is determined service acceptable for user?
Assessed QoS
Extension or breach of agreement?
Network parameters?
Delay?
Jitter?
Packet loss ratio or errors?
Any other factors?





QoS - different points of view?
Customer
Service provider
Second proposal of requirements for non-real-time services
What are non-real-time services?
Recommendation ITU-T Y.1541
Why is QoS so significant?
Which level do services ought to be provided at?

How to ensure satisfied users?


QoS - different points of view?
Service provider
What is offered by provider?
Service provider
What is achieved by provider?
Customer
How services are perceived by users?
Customer
What level of services do customers need to possess?
Division of non-real-time services
Non Real Time & Assymetric
Web Browsing
E-mail
File Transfer Protocol
Telnet
Non Real Time & Symmetric
Internet Chat

First proposal of requirements for non-real-time services
First proposal of requirements for non-real-time services
First proposal of requirements for non-real-time services
First proposal of requirements for non-real-time services
First proposal of requirements for non-real-time services
First proposal of requirements for non-real-time services
Third proposal of requirements for non-real-time services
No stringent timining requirements
Delay is important enough
Summary
Our offer of QoS parameters for N-RTSs (Basing on three previous proposals)

Bibliography
International Telecommunication Union (ITU), Recommandation Y-1541: Network performance objectives for IP-based, 2011
Chen Y., Farley T., YeQoS N., Requirements of Network Applications on the Internet, Systems Management 4, 2004, 55–76.
International Telecommunication Union (ITU), Recommandation G.1010: End-user multimedia QoS categories, 2001.
QOS over IP-Based Networks" part of the ITU-T SG13/SG16 Workshop on IP Networking and Mediacom 2004, Geneva, Switzerland
Chen Y., Farley T., YeQoS N., Requirements of Network Applications on the Internet, Systems Management 4, (2004), 55–76.
First proposal of requirements for non-real-time services
Quality of Service - classification?
Research of Arizona State University
Recommendation ITU-T G.1010
QoS - another required term?
The effect of service performance -> The degree of satisfaction of a user
Presentation: QOS over IP-Based Networks, part of the ITU-T SG13/SG16
Presentation: QOS over IP-Based Networks, part of the ITU-T SG13/SG16
Summary
Summary
Full transcript