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International CQR Workshop 2007 May 16, 2007 Sanibel Harbour Resort & Spa. Next Generation Networks and QoS. Koichi Asatani Kogakuin University, Tokyo Chair Emeritus, IEEE CQR-TC Advisory Board. X 10 4. 1200. 0AB-J 050-. 1000. 800. 600. 400. 200. 0. 2004.3. 2005.6. 2005.3.

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Next generation networks and qos

International CQR Workshop 2007

May 16, 2007

Sanibel Harbour Resort & Spa

Next Generation Networks and QoS

Koichi Asatani

Kogakuin University, Tokyo

Chair Emeritus, IEEE CQR-TC Advisory Board


Ip telephony subscriber number in japan

104

1200

0AB-J

050-

1000

800

600

400

200

0

2004.3

2005.6

2005.3

2003.12

2004.6

2004.9

2006.3

2005.9

2004.12

2005.12

IP Telephony Subscriber Number in Japan



Global international call growth

1985

1990

1995

2000

2005

Global International Call Growth

Billion Minutes

Total Traffic (PSTN+VoIP)

VoIP

Note: Forecasted Data for 2003 and after

source: http://www.dri.co.jp/auto/report/telegeo/telegeotg04.htm


Evolution in networks and applications
Evolution in Networks and Applications

Analog Telephone

Network

Telephone

FAX

Digital Telephone

Network

Packet Switched

Network

ftp telnet

e-mail

ARPA

Data

communications

ISDN

WWW

Internet

Internet access

IP Telephony

SDH

B-ISDN

ATM

NGI

Broadband

Streaming

FR

FWA

ADSL

nGWL

FTTH

Voice

sound

Video

Mutlimedia

NGN

Burst, Streaming

Unicast, Multicast

P2P

Telecom

Applications

Network Evolution

Internet

Applications


Principles and convergence
Principles and Convergence

Internetism

Telecomism

Network Principle

Network is responsible.

End-to-end Principle

End nodes are responsible.

Terminal

liberalization

Trustful networks

Trustful end users

Stateful networks

Stateless networks

flow control, RSVP

MPLS DiffServe

QoS guaranteed networks

Best effort networks

ADSL

PROXY,NAT,

Firewall

Non-transparent network

Transparent network

ISDN


Definition features of ngn
Definition & Features of NGN

Generalized Mobility

FMC

Unrestricted Access

Open Access I/F

Service Separated

Transport

Architecture & Open API

QoS-enabled Transport

Manageable Broadband

Multiple-Broadband

Source:Rec.Y.2001


Next generation networks ngn
Next Generation Networks (NGN)

Video Services (TV, movies, etc.)

Data Services (WWW, e-mail, etc.)

Telephone Services

Anything and Everything

NGN Service-Related Functions

(Any/All Applications

e.g., voice, data, video)

“Service Stratum”

Scope of the Internet

Internet Protocol

(IP)

NGN Transport Functions

Everything

(Any and All Network Technologies)

“Transport Stratum”

Source: ITU-T Recommendation Y.2011 — General principles and general reference model for next generation networks


Release Approach for NGN

Services and Capabilities

NGN Release 3

-RFID

- Ubiquitous

services

NGN Release 2

-Entertainment

-Home Networks

Enhencement

to Release 2

Capabilities

- Streaming

services

Enhancement

to Release 1

Capabilities

NGN Release 1

-Multimedia

-PSTN/ISDN

Emulations

-Multimedia

-PSTN/ISDN

Emulations

Mid of 2006

Mid of 2007?

End of 2008


Complexity of ngn qos

N G N

Domain 2DiffServ

Domain 3MPLS-TE

Domain 1IntServ

Domain 4Over-Prov

802.xx

Access

2G/3G

Wireless

Multi-Service Packet Transport

xDSL

Cable

Complexity of NGN QoS

  • User-perceived QoS is end-to-end (cf. E.800)

  • NGN QoS is complex because

    • NGN applications have diverse performance needs

    • IP is not designed for consistent application performance

      • Various mechanisms have been introduced with specific applicability

    • Diversity in an end-to-end path is common owing to

      • Different levels of QoS support in endpoints

      • Varying types of QoS support in the transport

      • Multiple provider domains

Effective management of resource contention


Definition of qos
Definition of QoS

The collective effect of service performance which determine the degree of satisfaction of a user of the service.

The QoS is characterized by the combined aspects of service support performance, service operability performance, serveability performance, service security performance and other factors specific to each service.

The term "QoS" is not used to express a degree of excellence in a comparative sense nor is it used in a quantitative sense for technical evaluations. In these cases a qualifying adjective (modifier) should be used.

ITU-T Rec. E.800


Definition of quality of experience qoe
Definition of Quality of Experience (QoE)

The overall acceptability of an application or service, as perceived subjectively by the end-user.

The QoE includes the complete end-to-end system effects (client, terminal, network, services infrastructure, etc).

Overall acceptability may be influenced by user expectations and context.

User-Experience-Oriented Quality

ITU-T Rec. P.10/G.100


Standards setting organizations on qoe
Standards Setting Organizations on QoE

VQEG

JRG –MMQA

ITU-T SG12

Performance and quality of service

ITU-T SG9

Integrated broadband cable networks and television and sound transmission

ITU-R SG6

Broadcasting services

ITU FG-IPTV

ITU-T SG13

Next Generation Networks

VQEG: Video Quality Experts Group

JRG –MMQA: Joint Rapporteurs’ group for Multimedia Quality Assessment

FG-IPTV: Focus Group - IPTV


CN

AN

AN

CPN

CPN

Ref. Configuration of QoS, NP and QoE

Network Interface

Man-Machine Interface

Network Interface

Man-Machine Interface

User

TE

TE

User

Network Performance for NGN

QoE

QoE

Quality of Service for NGN


Itu t racf architecture

intra-

domain

inter-

domain

  • Policy Decision Function

    service facing, transport independent

  • Transport Resource Control Function

    service independent, transport dependent, possibly network-segment specific

  • Policy Enforcement Function

    typically part of border transport elements

Other NGNs

ITU-T RACF Architecture

Service Control Functions

(part of IMS or else)

Service Stratum

Rs

Transport Stratum

Rp

Rd

Policy

Decision

Function

Transport Resource Control

Function

Network Attachment Control Functions

Ru

Ri

Rt

RACF

Rc

Rn

Rw

Interconnection Functions

Transport

Enforcement

Function

Policy

Enforcement

Function

Transport Functions

  • RACF augments native transport QoS support

    • Preempting transport congestion at the servicecontrol layer

  • All applications (VoIP, IPTV, etc.) involving network-based control can make use of RACF via Rs


Ip based network performance
IP-based network performance

Performance Parameter

Nature of Network Performance Objective

Class 0

Class 1

Class 2

Class 3

Class 4

Class 5

Class 6

Class 7

IPTD

Upper bound on the mean IPTD

100 ms

400 ms

100 ms

400 ms

1 s

U

100 ms

400 ms

Upper bound on the 1-10-3 quantile of IPTD minus the minimum IPTD

50 ms

50 ms

U

U

U

U

50 ms

50 ms

IPDV

IPLR

Upper bound on the packet loss probability

1*10-3

1*10-3

1*10-3

1*10-3

1*10-3

U

1*10-5

1*10-5

IPER

Upper bound

1*10-4

U

1*10-6

1*10-6

Y.1541


Object quality assessments model
Object Quality Assessments Model

Application Scenario

Application Scenario

Estimated

Media

Benchmarking/

Benchmarking/

Non

Non

-

-

intrusive

intrusive

Network planning

Network planning

subjective quality

monitoring

monitoring

Intrusive monitoring

Intrusive monitoring

One

One

-

-

way

way

P.862/P.862.1

P.862/P.862.1

P.563, P.VTQ

P.563, P.VTQ

(Telephone-band)

(Listening quality)

(Listening quality)

(Telephone-band)

P.862.2

P.862.2

(Wideband)

(Wideband)

Speech

Two

Two

-

-

way

way

G.107

G.107

P.CQO (Telephone-band)

(Conversational

(Conversational

(Telephone-band)

quality)

quality)

G.WBEM

G.WBEM

(Wideband)

(Wideband)

One

One

-

-

way

way

BS.1387

BS.1387

-

-

1

1

Audio

(Listening quality)

(Listening quality)

One

One

-

-

way

way

J.144 (Cable TV)

J.144 (Cable TV)

?.YYY (Cable TV)

?.YYY (Cable TV)

Video

(Viewing quality)

(Viewing quality)

?.XXX (Multimedia)

?.XXX (Multimedia)

?.ZZZ

?.ZZZ

(Multimedia)

(Multimedia)

One

One

-

-

way

way

J.148 (Multimedia)

J.148 (Multimedia)

Speech/Audio

G.OMV

G.OMV

Two

Two

-

-

way

way

and Video

(Videophone)

One

One

-

-

way

way

G.Chirp

G.Chirp

G.1030 Annex A

G.1030 Annex A

Data

(Web

(Web

-

-

browsing)

browsing)

(Web

(Web

-

-

browsing)

browsing)


Ngn related standardization organizations
NGN-related Standardization Organizations

ITU

TTC (Japan)

ATIS

TTA (Korea)

CCSA (China)

ETSI

USA

TISPAN

3GPP

Asia

IETF

Europe


Next generation ip network promotion forum
Next Generation IP Network Promotion Forum

  • Established on Dec. 16, 2005

  • Based on a report from MIC Study Group on Next Generation IP Infrastructure

  • To Promote evolution to IP-based Networks in Japan

  • Under close cooperation among industries, government and academia



Challenges
Challenges!

  • Latency aware network configuration Implementation: not a subject of standards

  • Ubiquitous applications?

    • Transaction or (SIP) Connection?

  • QoE/QoS on End-to-End base,

    including Customer Premises Network, e.g.,Home Networks

    • No performance allocations to devices outside of UNI

    • Multi-domain environments


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