Transcript IP Telephony and NGN - Telecommunications Industry Association

Telecommunications Industry Association
TR-30.3/07-04-003
Document Cover Sheet
Project Number
PN-3-0062 (TIA-921) RV1
Document Title
Revision to Network Model for Evaluating Multimedia Transmission Performance
Over Internet Protocol
Source
Spirent Communications
Contact
Jack Douglass
25701 Patterson Place
Laguna Hills, CA 92653
Distribution
TR-30.3
Intended Purpose
of Document
(Select one)
X
Phone: 949-436-0663
Fax: 949-480-1220
Email: [email protected]
For Incorporation Into TIA Publication
For Information
Other (describe) -
The document to which this cover statement is attached is submitted to a Formulating Group or
sub-element thereof of the Telecommunications Industry Association (TIA) in accordance with the
provisions of Sections 6.4.1–6.4.6 inclusive of the TIA Engineering Manual dated March 2005, all of
which provisions are hereby incorporated by reference.
Abstract
This presentation was give for information purposes at the ETSI TISPAN WG6 IMS/NGN Performance
Benchmarking SIG Meeting in Sophia Antipolis, France on February 22, 2007. As a result of the
presentation they decided to incorporate TIA-921/G.1050 into ETSI TS186 008 in a future release and
establish an official liaison with TR30.3 and ITU SG12. They will be sending an official liaison letter
requesting that we include IP impairments conditions in TIA-921/G.1050 that reflect the types of
impairments that may be experience on IMS/NGN networks.
ITU-T G.1050/TIA-921
IP Network Model Overview
February 22, 2007
Jack Douglass
Chairman TR30.3
Director Technical Marketing
Spirent Communications
Network Impairments and Parameters
that Affect Video Quality
Network Architecture
Types of Access Links
QoS controlled Edge Routing
MTU Size
Packet Loss (Frame Loss)
Out of order packets
One Way Delay (Latency)
Variable Delays (Jitter)
Occupancy (Background Traffic,
Congestion, Network Load)
Route Flapping
Network faults
Link Failures
Signaling protocol issues
Video Only Impairments
 Video coding algorithms
 Fixed, Variable, Capped Bit Rate
 Transcoding
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ITU-T G.1050 and TIA-921
IP Network Model
DUT
A
LAN A
1000BaseX
100BaseT Switch
100BaseT Hub
10BaseT
WLAN (~4Mbps)
----------------Occupancy level
Packet loss
Local
Access
A
64kbps
128kbps
256kbps
384kbps
512kbps
768kbps
T1/E1
T3/E3
xDSL
Cable
Fiber
---------------Occupancy
level
Qos Edge
Router
Core IP
Network
Route flapping
Link Failures
One-way delay
Jitter
Packet loss
Packet Reorder
Local
Access
B
64kbps
128kbps
256kbps
384kbps
512kbps
768kbps
T1/E1
T3/E3
xDSL
Cable
Fiber
---------------Occupancy level
Qos Edge Router
LAN B
DUT
B
1000BaseX
100BaseT Switch
100BaseT Hub
10BaseT
WLAN (~4Mbps)
----------------Occupancy level
Packet loss
General Model for Voice, Data or Video
4
TIA-921A (PN-3-0062RV2)
New IP Network Impairment Model for IPTV
DUT
A
Core IP
Network
Route flapping
Link Failures
One-way delay
Jitter
Packet loss
Packet Reorder
Local
Access
B
LAN B
ADSL2
Bonded ADSL2
VDSL
WiMax
3G Wireless
Cable
PON
---------------Occupancy level
Qos Edge Router
DUT
B
1000BaseX
100BaseT Switch
100BaseT Hub
10BaseT
WLAN (~4Mbps)
----------------Occupancy level
Packet loss
New Model for IPTV
5
ITU-T G.1050 and TIA-921
Test Profiles
Service Test Profiles
Applications (Examples)
Node Mechanisms
Network Techniques
Well-Managed IP
Network
(Profile A)
High quality video and VoIP,
VTC (Real-time applications,
loss sensitive, jitter sensitive,
high interaction)
Strict QoS, guaranteed no
over subscription on links
Constrained routing and
distance
Partially-Managed
IP Network
(Profile B)
VoIP, VTC
(Real-time applications, jitter
sensitive, interactive)
Separate queue with
preferential servicing, traffic
grooming
Less constrained routing and
distances
Unmanaged IP
Network, Internet
(Profile C)
Lower quality video and VoIP,
signaling, transaction data
(highly interactive)
Separate queue, drop
priority
Constrained routing and
distance
Less constrained routing and
distances
Transaction data, interactive
Short transactions, bulk data
(low loss)
Long queue, drop priority
Any route/path
Traditional Internet
applications (default IP
networks)
Separate queue (lowest
priority)
Any route/path
ITU-T Recommendation Y.1541 uses a similar approach,
but there is not a one-to-one mapping.
6
ITU-T G.1050 and TIA-921
Test Profiles based on ITU-T Y1541
Different test profiles for different Service Level Agreements (SLAs)
Impairment Type
Units
Range (min to max)
One Way Latency
ms
20 to 100 (regional)
20 to 300 (intercontinental)
Jitter (peak to peak)
ms
0 to 50
Sequential Packet Loss
ms
Random loss only (except
when link failure occurs)
Rate of Sequential Loss
sec-1
Random loss only (except
when link failure occurs)
Random Packet Loss
%
0 to 0.05
Reordered Packets
%
0 to 0.001
Profile A – Well-Managed Network Impairment Ranges
• Y.1541 QoS Level – suitable for high quality video and VoIP
• Most Service Providers will be supporting this SLA for IPTV
7
ITU-T G.1050 and TIA-921
Test Profiles based on ITU-T Y1541
Different test profiles for different Service Level Agreements (SLAs)
Impairment Type
Units
Range (min to max)
One Way Latency
ms
50 to 200 (regional)
50 to 400 (intercontinental)
Jitter (peak to peak)
ms
0 to 150
Sequential Packet Loss
ms
40 to 200
Rate of Sequential Loss
sec-1
< 10-3
Random Packet Loss
%
0 to 2
Reordered Packets
%
0 to 0.01
Profile B – Partially-Managed Network Impairment Ranges
•Y.1541 QoS Level – suitable for Lower quality video and VoIP
8
ITU-T G.1050 and TIA-921
Test Profiles based on ITU-T Y1541
Different test profiles for different Service Level Agreements (SLAs)
Impairment Type
Units
Range (min to max)
One Way Latency
ms
50 to 800
Jitter (peak to peak)
ms
0 to 500
Sequential Packet Loss
ms
40 to 10,000
Rate of Sequential Loss
sec-1
< 10-1
Random Packet Loss
%
0 to 20
Reordered Packets
%
0 to 0.1
Profile C – Un-Managed Network Impairment Ranges
•Y.1541 QoS Level – Internet little or no guarantees
9
ITU-T G.1050 and TIA-921
8 Impairment Severity Combinations
Severity=>
Impairment
A
B
C
D
E
F
G
H*
Units
Profie A LOO
%
50
30
15
5
0
Profile B LOO
%
5
25
30
25
10
Profile C LOO
%
5
5
10
15
20
0
0
0
5
0
0
25
15
5
Source Location (A) Parameters
LAN A Occupancy
%
1
2
3
5
8
12
16
20
Access A Occupancy
%
0
1
2
4
8
15
30
50
512
512
1508
1508
1508
1508
1508
1508
MTU A
bytes
Core Network Impairments
Route flap interval
seconds
0
3600
1800
900
480
240
120
60
Route flap delay
ms
0
2
4
8
16
32
64
128
Delay
ms
4
8
16
32
64
128
256
512
Jitter (peak to peak)
ms
5
10
24
40
70
100
150
500
Link fail interval
seconds
0
3600
1800
900
480
240
120
60
Link fail duration
ms
0
64
128
256
400
800
1600
3000
Packet loss
%
0
0.01
0.02
0.04
0.1
0.2
0.5
1
Reordered packets
%
0
0.00025
0.0005
0.001
0.005
0.01
0.05
0.1
Destination Location (B) Parameters
Access B Occupancy
MTU B
LAN B Occupancy
%
bytes
%
0
1
2
4
8
15
30
50
512
512
1508
1508
1508
1508
1508
1508
1
2
3
5
8
12
16
20
Impairment Severity Combinations
10
ITU-T G.1050 and TIA-921
LAN and Access Rates
Home Rates
LAN Rate
LOO
Mbit/s
%
Access Rate
LOO
Toward core
From core
kbit/s
kbit/s
Represents
%
Represents
4
75
802.11b, 10BaseT hub
20
25
802.11g, 100BaseT hub
128
768
40
Cable, ADSL
384
1536
50
Cable, ADSL
384
3000
10
Cable, ADSL
LAN Rates for Home Locations
Access Rates for Home Locations
Business Rates
LAN Rate
LOO
Mbit/s
%
Represents
4
20
802.11b, 10BaseT
20
20
802.11g, 100BaseT hub
100
60
100 BaseT switched, Gbit Ethernet
Access Rate
LOO
Toward core
From core
kbit/s
kbit/s
Represents
%
384
1536
40
ADSL entry
384
3000
15
ADSL premium
1536
1536
40
T1
43000
43000
5
T3
LAN Rates for Business Locations
Access Rates for Business Locations
LAN and Access Rates (New Revision of Standard/Recommendation) will change as network conditions
change
• General – 133 LAN/Access Rate Combinations
• IPTV Video – 3 LAN/Access Rate Combinations
11
TIA-921A (PN-3-0062RV2)
New LAN and Access Rates for IPTV
New LAN and Access Rate for IPTV
Access Rates for Home Locations applications > 3Mb/s
Access Rate
LOO
Toward core
From core
kbit/s
kbit/s
LAN
Mbps
Represents
%
Access (Kbps)
To Core
From Core
1
20
768
7,000
768
7,000
50
Cable, ADSL2, VDSL
2
20
1,024
20,000
1,024
20,000
20
Bonded ADSL2, VDSL
3
20
3,072
30,000
3,072
30,000
15
Cable, Bonded ADSL2, VDSL
4
20
3,072
50,000
3,072
50,000
15
Cable, PON
5
20
13,000
13,000
6
100
768
7,000
7
100
1,024
20,000
8
100
3,072
30,000
9
100
3,072
50,000
10
100
13,000
13,000
Access Rates for Large Business Locations
Access Rate
LOO
Toward core
From core
kbit/s
kbit/s
Represents
%
3,072
30,000
5
13,000
13,000
20
WiMax
3G Wireless, WiMax
10 LAN/Access Rate Combinations
for IPTV
12
Impairment Characteristics
Impairment Characteristics
Good
Bad
Route Flap
Link Failure
Severe
• General Model – 1064 ICs, IPTV 24 ICs
• New IPTV Model – 80 ICs
13
ITU-T G.1050 and TIA-921
Example of Network Model Coverage (NMC) Curve
Video Quality may
also be plotted
OR
14
Example: Using G.1050/TIA-921 to Test
Video Quality
VLC
Video Monitor
Video Stream output
Video Streaming
Server (VSS)
Received Video Stream
G.1050
TIA921
IP Network
Impairment
Emulator
Video Streaming
Client (VSC)
MPEG2 and
H.264 Video
Streams
Video Quality
Measurement
System
131A to 133H Impairment Conditions
3 Minutes per Impairment Combination
Video Quality Measurements
15
G.1050/TIA-921 IP Impairments
Example Video Testing
131A
131B
131C
24 ICs
131D
131A
to
133H
131E
131F
131G
131H
16
Example Video Quality (V-Factor) – MPEG2
G.1050/TIA-921 IP Impairements
MPEG Video Quality in the presence of G.1050/TIA-921 IP Impairments
•MPEG2 video has a higher quality than H.264 Video under the same G.1050/TIA-921 IP Impairments
17
Example: Video Quality (V-Factor) – H.264
G.1050/TIA-921 IP Impairements
H.264 Video Quality in the presence of G.1050/TIA-921 IP Impairments
•H.264 video has a lower quality than MPEG2 Video under the same G.1050/TIA-921 IP Impairments
18
Example of How to Use TIA-921/G.1050 in
ETSI TS 186-008-x
G.1050
TIA921
IP Network
Impairment
Emulator
NGN IMS overview (from ES 282 007)
19
Liaison with TIA-TR30.3
 Project for IP impairment for IMS/NGN
 Include access characteristics in current project
 Open up new project specific to IMS/NGN
 TIA TR30.3
 TIA-921
 ITU-T SG-12
 G.1050
20