Next Generation Networks and QoS

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Next Generation Networks and QoS
International CQR Workshop 2007 May 16,
2007 Sanibel Harbour Resort Spa

• Koichi Asatani
• Kogakuin University, Tokyo
• Chair Emeritus, IEEE CQR-TC Advisory Board

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IP Telephony Subscriber Number in Japan
3
Broadband in Japan
4
Global International Call Growth
Billion Minutes
Total Traffic (PSTNVoIP)
VoIP
Note Forecasted Data for 2003 and after
source http//www.dri.co.jp/auto/report/telegeo/t
elegeotg04.htm
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Evolution in Networks and Applications
Analog Telephone Network
Telephone
FAX
Packet Switched Network
Digital Telephone Network
ftp telnet e-mail
ARPA
Data communications
WWW
ISDN
Internet
Internet access
IP Telephony
SDH
B-ISDN
ATM
NGI
Broadband Streaming
FR
ADSL
FWA
FTTH
nGWL
NGN
Voice
sound
Video
Mutlimedia
Burst, Streaming Unicast, Multicast
P2P
Network Evolution
Telecom Applications
Internet Applications
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Principles and Convergence
Internetism
Telecomism
Network Principle Network is responsible.
End-to-end Principle End nodes are responsible.
Trustful networks
Trustful end users
Terminal liberalization
Stateful networks
Stateless networks
flow control, RSVP MPLS DiffServe
Best effort networks
QoS guaranteed networks
ADSL
PROXY,NAT, Firewall
Non-transparent network
Transparent network
ISDN
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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
SourceRec.Y.2001
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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
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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
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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
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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
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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
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Standards Setting Organizations on QoE
VQEG Video Quality Experts Group JRG MMQA
Joint Rapporteurs group for Multimedia Quality
Assessment FG-IPTV Focus Group - IPTV
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Ref. Configuration of QoS, NP and QoE
Network Interface
Man-Machine Interface
Network Interface
Man-Machine Interface
TE
TE
User
User
Network Performance for NGN
QoE
QoE
Quality of Service for NGN
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ITU-T RACF Architecture
Service Control Functions (part of IMS or else)
Service Stratum
Rs
Transport Stratum


Rd
Rp
Policy Decision Function
Transport Resource Control Function
Network Attachment Control Functions
Ru
Ri
Rt
RACF
Rc
Rw
Rn
Interconnection Functions
Transport Enforcement Function
Policy Enforcement Function
Transport Functions

• RACF augments native transport QoS support
• Preempting transport congestion at the service
  control layer
• All applications (VoIP, IPTV, etc.) involving
  network-based control can make use of RACF via Rs

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IP-based network performance
Class 5
Class 6
Class 7
Class 4
Class 3
Class 2
Class 1
Class 0
Nature of Network Performance Objective
Performance Parameter
U
100 ms
400 ms
1 s
400 ms
100 ms
400 ms
100 ms
Upper bound on the mean IPTD
IPTD
U
50 ms
50 ms
U
U
U
50 ms
50 ms
Upper bound on the 1-10-3 quantile of IPTD minus
the minimum IPTD
IPDV
U
110-5
110-5
110-3
110-3
110-3
110-3
110-3
Upper bound on the packet loss probability
IPLR
U
110-6
110-6
110-4
Upper bound
IPER
Y.1541
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Object Quality Assessments Model
Application Scenario
Application Scenario
Estimated
Media
Network planning
Non
-
intrusive
Benchmarking/
Network planning
Non
-
intrusive
Benchmarking/
subjective quality
monitoring
monitoring
Intrusive monitoring
Intrusive monitoring
P.563, P.VTQ
P.862/P.862.1
One
-
way
P.563, P.VTQ
P.862/P.862.1
One
-
way
(Telephone-band)
(Listening quality)
(Listening quality)
(Telephone-band)
P.862.2
P.862.2
(Wideband)
(Wideband)
Speech
G.107
Two
-
way
G.107
Two
-
way
P.CQO (Telephone-band)
(Telephone-band)
(Conversational
(Conversational
quality)
quality)
G.WBEM
G.WBEM
(Wideband)
(Wideband)
BS.1387
-
1
One
-
way
BS.1387
-
1
One
-
way
Audio
(Listening quality)
(Listening quality)
?.YYY (Cable TV)
J.144 (Cable TV)
One
-
way
?.YYY (Cable TV)
J.144 (Cable TV)
One
-
way
Video
?.ZZZ
?.XXX (Multimedia)
(Viewing quality)
?.ZZZ
?.XXX (Multimedia)
(Viewing quality)
(Multimedia)
(Multimedia)
J.148 (Multimedia)
One
-
way
J.148 (Multimedia)
One
-
way
Speech/Audio
G.OMV
Two
-
way
G.OMV
Two
-
way
and Video
(Videophone)
G.1030 Annex A
G.Chirp
One
-
way
G.1030 Annex A
G.Chirp
One
-
way
Data
(Web
-
browsing)
(Web
-
browsing)
(Web
-
browsing)
(Web
-
browsing)
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NGN-related Standardization Organizations
ITU
TTC (Japan)
ATIS
TTA (Korea)
CCSA (China)
ETSI
USA
Asia
TISPAN
3GPP
IETF
Europe
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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

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Forum Structure
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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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