1. Hans (Hyungsoo) Kim KT corp. hans9@kt.co.kr
Implementation Scenario of
QoS standard in Korea
Hans (Hyungsoo) Kim
KT corp.

2. Contents Introduction Relative Standards How to be implemented
Future collaboration among three countries

3. Introduction Standard bodies have developed QoS standards
How to be implemented into real field ?

4. Relative Standards Focusing on FG NGN works,
TR-NGN.QoS, TR-NGN.NHNperf., TR-e2eqos, TR-123qos, 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)

5. Relative Standards – SG 12
Figure 2 / G.1000

6. Relative Standards – FG NGN
Functional Architecture for RACS
Application Functions
RACF
Transport Functions
CPE
NAAF
Functions in other domains

7. Relative Standards – SG 12
Architecture for IP signaling
Application
&
QoS
Requirements
Perceived
Classes
& Decisions
Design/
Eng .
Provisioning
QoS Mech
Reports (
SLAs )
Cnfg
.Choices
Feedback
Monitoring
User
Terminal Equip
Network
Request
ACK/REJ/Mod
Result
Network(s)
UNI
NNI

8. 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

9. Application & QoS requirements
G.1010 (SG 12)
Performance requirements for particular applications
If new applications appear or different performance requirements are required, new performance requirements should be specified
Medium
Application
Degree of symmetry
Typical data rates
Key performance parameters and target values
One-way
delay
Delay
variation
Information loss
Other
Audio
Voice messaging
Primarily
one-way
 4-32 kb/s
< 1 sec for playback
< 2 sec for record
< 1 msec
< 3%
High quality streaming audio
Primarily one-way
kb/s
< 10 sec
< 1%
Video
Videophone
Two-way
kb/s
< 150 msec preferred <400 msec limit
Lip-synch : < 80 msec

10. Application & QoS requirements
Different value of applications for Providers
Application
Value level
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
When user request Application itself : Don’t need to follow G.1010 !!
When user request QoS itself : The burden of processing is too much !!

11. Application QoS classes
AQC makes the engineering easier and more efficient !!
Network
QoS classes
NQC 1
NQC 2
NQC 3
NQC 4 .
Application
QoS classes
AQC 1
AQC 2
AQC 3
AQC 4 .
Application
Requirement
VoIP
by web-phone
VoIP
for stringent QoS
(i.e. 80 ms, 0 Loss)
QoS
requirement
Simplified QoS requirement for Network Engineering
(i.e. Call Control, QoS control, Network Control, Traffic Engineering)

12. Performance Parameter Nature of Network Performance Objective
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
1 s U
IPDV
Upper bound on the quantile of IPTD minus the minimum IPTD
50 ms
IPLR
Upper bound on the packet loss probability
1*10-3
1*10-5
IPER
Upper bound
1*10-4
1*10-6
Core Network
Access
Network
TE/CPN
User
Network QoS
Edge
Application QoS
UNI
Added in Feb. of 2005

13. Performance Objectives
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;
Based on the above apportionment, more details are allocated as follows;
Network QoS classes
Performance Objectives
IPTD
IPDV
IPLR
QoS guaranteed class
< 25 ms
< 30 ms
10-6
Best efforts class
Unspecified
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

14. 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)