Transcript NGN activities in Japan - IEEE Communications Society

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
Ｘ104
1200
0AB-J
050-
1000
800
600
400
200
0
2003.12
2004.3
2004.6
2004.9
2004.12
2005.3
2005.6
2005.9
2005.12
2006.3
Broadband in Japan
Global International Call Growth
Billion Minutes
250
200
150
100
50
Total Traffic (PSTN+VoIP)
0
VoIP
S1
Note: Forecasted Data for
2003 and after
source: http://www.dri.co.jp/auto/report/telegeo/telegeotg04.htm
Evolution in Networks and Applications
Telephone
FAX
Analog Telephone
Network
Digital Telephone
Network
Packet Switched
Network
ftp telnet
e-mail
ARPA
Data
communications
ISDN
WWW
Internet
Internet access
SDH
B-ISDN
ATM
FR
Voice
IP Telephony
sound
FWA ADSL
nGWL FTTH
Video
Mutlimedia
Burst, Streaming
Unicast, Multicast
Telecom
Applications
NGI
Network Evolution
Broadband
Streaming
NGN
P2P
Internet
Applications
Principles and Convergence
Telecomism
Internetism
Network Principle
Network is responsible.
End-to-end Principle
End nodes are responsible.
Trustful networks
Stateful networks
QoS guaranteed networks
Non-transparent network
Terminal
liberalization
flow control, RSVP
MPLS DiffServe
ADSL
PROXY,NAT,
Firewall
ISDN
Trustful end users
Stateless networks
Best effort networks
Transparent network
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)
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)
Internet Protocol
(IP)
Everything
(Any and All Network Technologies)
Scope of
the
Internet
“Service Stratum”
NGN Transport Functions
“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
- Ubiquitous
services
-RFID
NGN Release 2
-Entertainment
-Home Networks
- Streaming
services
NGN Release 1
-Multimedia
-PSTN/ISDN
Emulations
-Multimedia
-PSTN/ISDN
Emulations
Enhancement
to Release 1
Capabilities
Mid of 2006
Enhencement
to Release 2
Capabilities
Mid of 2007?
End of 2008
Complexity of NGN QoS
NGN
802.xx
Access
Cable
Domain 1
IntServ
Domain 2
DiffServ
Domain 3
MPLS-TE
Domain 4
Over-Prov
xDSL
Multi-Service Packet Transport
2G/3G
Wireless
• 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
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)
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
VQEG
JRG –MMQA
ITU-T SG9
ITU-T SG12
Performance and
quality of service
ITU FG-IPTV
Integrated broadband
cable networks and
television and sound
transmission
ITU-R SG6
Broadcasting services
ITU-T SG13
Next Generation Networks
VQEG:
JRG –MMQA:
FG-IPTV:
Video Quality Experts Group
Joint Rapporteurs’ group for Multimedia Quality Assessment
Focus Group - IPTV
Ref. Configuration of QoS, NP and QoE
Network
Interface
Man-Machine
Interface
User
TE
CPN
Network
Interface
AN
CN
AN
CPN
Man-Machine
Interface
TE
User
Network Performance for NGN
QoE
Quality of
Experience
Quality of Service for NGN
Quality of Service
User oriented
QoE
Network Performance
Provider oriented
User behaviour
attribute
Service attribute
Connection/Flow element attribute
Focus on userexpected effects
Focus on user-observable
effects
Focus on planning, development (design),
operations and maintenance
User subject
Between (at) service
access points
End-to-end or network elements
capabilities
ITU-T RACF Architecture
Service Control Functions
(part of IMS or else)
Service Stratum
Rs
Rp
Network Attachment
Control Functions
intradomain
interdomain
Rd
Transport
Resource
Control
Function
Ru
Policy
Decision
Function
Rt
Ri
RACF
Other NGNs
Transport Stratum
Rc
Rn
Transport
Enforcement
Function
Rw
Interconnection Functions
Policy
Enforcement
Function
Transport Functions
• 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
 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
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
1s
U
100 ms
400 ms
IPDV
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
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
U
1*10-6
1*10-6
1*10-4
Y.1541
Object Quality Assessments Model
Media
Application Scenario
Estimated
Benchmarking/
Intrusive monitoring
Non -intrusive
monitoring
One -way
(Listening quality)
P.862/P.862.1
(Telephone-band)
P.862.2
(Wideband)
P.563, P.VTQ
Two -way
(Conversational
quality)
P.CQO (Telephone-band)
Audio
One -way
(Listening quality)
BS.1387 -1
Video
One -way
(Viewing quality)
J.144 (Cable TV)
?.XXX (Multimedia)
One -way
J.148 (Multimedia)
subjective quality
Speech
Speech/Audio
and Video
Data
(Telephone-band)
G.107
(Telephone-band)
G.WBEM
(Wideband)
?.YYY (Cable TV)
?.ZZZ
(Multimedia)
G.OMV
(Videophone)
Two -way
One -way
Network planning
G.Chirp
(Web -browsing)
G.1030 Annex A
(Web -browsing)
NGN-related Standardization Organizations
ITU
TTC (Japan)
ATIS
TTA (Korea)
CCSA (China)
USA
ETSI
TISPAN
IETF
3GPP
Europe
Asia
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
Forum Structure
Next Generation IP Network
Promotion Forum
Chair: Prof. Tadao Saito (University of Tokyo)
Technology Group
Chair: Prof. Shigeki Goto
(Waseda University)
R&D and Standardization Group
Strategic Planning WG
Chair: Prof. Koichi Asatani
(Kogakuin University)
Home Networks WG
Planning and Promotion Group
Chair: Dr. Yuichi Matsushima (NICT)
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