Transcript TSACC Test Area

Implementation Scenario of
QoS standard in Korea
Hans (Hyungsoo) Kim
KT corp.
[email protected]
The 3rd CJK NGN Working Group Meeting
March 28~29, 2005, Tokyo, Japan
Contents
Introduction
Relative Standards
How to be implemented
Future collaboration among three countries
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Introduction
Standard bodies have developed QoS standards
How to be implemented into real field ?
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Relative Standards
• Focusing on FG NGN works,
– TR-NGN.QoS, TR-NGN.NHNperf., TR-e2eqos, TR123qos, TR-ipaqos and TR-RACS are considered
• Regarding on Other standards,
– G.1000 & G.1010 (SG 12)
– Y.1540, Y.1541 & Y.1560 (SG 12)
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Relative Standards – SG 12
Figure 2 / G.1000
CUSTOMER
SERVICE
PROVIDER
Customer’s
QoS
Requirements
QoS Offered
By
Provider
QoS
Perceived
By Customer
QoS
Achieved by
Provider
T1213040-02
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Relative Standards – FG NGN
• Functional Architecture for RACS
Application Functions
RACF
CPE
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Functions in other domains
NAAF
Transport Functions
6
Relative Standards – SG 12
• Architecture for IP signaling
User
Terminal Equip
Network
UNI
Application
& QoS
Requirements
Request
Application
Requirements
Result
Cnfg .Choices
QoS Classes
& Decisions
ACK/REJ/Mod
Request
ACK/REJ/Mod
Design/ Eng .
Feedback
Provisioning
QoS Mech .
Monitoring
Reports
(SLAs )
Perceived
QoS
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Request
Network(s)
NNI
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How to be implemented
• Here is the application requiring Guaranteed QoS
– How to identify ‘Application & QoS requirement’?
– How to be controlled through Service/Network Stratum?
– What kinds of further details should be requested ?
Applications
Service Stratum
Transport Stratum
NGN Configuration
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Application & QoS requirements
•
G.1010 (SG 12)
–
Performance requirements for particular applications
Key performance parameters and target values
Medium
Application
Degree of
symmetry
Typical data
rates
One-way
delay
Delay
variation
Information
loss
Audio
Voice messaging
Primarily
one-way
4-32 kb/s
< 1 sec for playback
< 2 sec for record
< 1 msec
< 3%
Audio
High quality
streaming audio
Primarily oneway
16-128 kb/s
< 10 sec
< 1 msec
< 1%
Video
Videophone
Two-way
16-384 kb/s
< 150 msec preferred
<400 msec limit
< 1%
Video
One-way
One-way
16-384 kb/s
< 10 sec
< 1%
–
Other
Lip-synch :
< 80 msec
If new applications appear or different performance
requirements are required, new performance
requirements should be specified
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Application & QoS requirements
• Different value of applications for Providers
Value level
Application
Low
High
VoIP
Web-phone for free
SIP phone for business purpose
VoD
Outside from the provider
Supported by the provider
P-to-P
Flat-rate charging users
Usage-based charging users
Web-surfing
News portal site
Registration/booking site
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When user request Application itself :
Don’t need to follow G.1010 !!
•
When user request QoS itself :
The burden of processing is too much !!
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Application QoS classes
• AQC makes the engineering easier and more efficient !!
Application
Requirement
QoS
requirement
VoIP
by web-phone
VoIP
for stringent QoS
(i.e. 80 ms, 0 Loss)
Application
QoS classes
Network
QoS classes
AQC 1
NQC 1
AQC 2
NQC 2
AQC 3
NQC 3
AQC 4
NQC 4
.
.
.
.
Simplified QoS requirement for Network Engineering
(i.e. Call Control, QoS control, Network Control, Traffic Engineering)
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Network QoS classes
Y.1541 covers UNI-UNI for IP service
In optical transmission, 100 ms delay is achieved in less than 4,000 Km
Based on the distance and complexity of link, it should be modified
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
UNI
User
TE/
CPN
Edge
Access
Network
UNI
Edge
Core Network
Access
Network
TE/
CPN
User
Added in Feb.
of 2005
Network QoS
Application QoS
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Network QoS classes
•
In Korea, the longest link is less than 600 km and has 8 routers
–
End-to-end performance objectives are allocated as follows;
Performance Objectives
Network QoS classes
–
IPTD
IPDV
IPLR
QoS guaranteed class
< 25 ms
< 30 ms
10-6
Best efforts class
Unspecified
Unspecified
Unspecified
Based on the above apportionment, more details are allocated as follows;
End-to-end
Core
Access
IPTD
< 25 ms
< 7 ms
< 9 ms
IPDV
< 30ms
< 10 ms
< 10ms
IPLR
< 10-6
< 2 x 10-7
< 4 x 10-7
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Conclusion
For the end-to-end QoS control, Application QoS
Classes concept is useful to cooperate with Network
QoS classes
AQC is developing in TR-NGN.QoS of FG NGN WG3
Network QoS classes should be allocated / extended,
based on the each country's and provider’s network
(distance and complex)
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