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

Phone: 949-436-0663 Fax: 949-480-1220 Email: jack.douglass@spirent.com

Distribution TR-30.3

For Incorporation Into TIA Publication X For Information

Intended Purpose of Document (Select one) 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.

Telecommunications Industry Association

TR-30.3/07-04-003

ITU-T G.1050/TIA-921 IP Network Model Overview

February 22, 2007Jack Douglass

Chairman TR30.3Director Technical Marketing

Spirent Communications

3

Network Impairments and Parameters that Affect Video Quality

Network Architecture Types of Access LinksQoS controlled Edge RoutingMTU SizePacket Loss (Frame Loss)Out of order packetsOne Way Delay (Latency) Variable Delays (Jitter)Occupancy (Background Traffic, Congestion, Network Load)

Route FlappingNetwork faultsLink FailuresSignaling protocol issuesVideo Only Impairments

Video coding algorithms Fixed, Variable, Capped Bit Rate Transcoding

4

ITU-T G.1050 and TIA-921 IP Network Model

1000BaseX100BaseT Switch

100BaseT Hub10BaseT

WLAN (~4Mbps)-----------------

Occupancy levelPacket loss

64kbps128kbps256kbps384kbps512kbps768kbps

T1/E1T3/E3xDSLCableFiber

----------------Occupancy

levelQos Edge

Router

LAN ACore IPNetwork

DUTA

Route flapping

Link Failures

One-way delay

Jitter

Packet loss

Packet Reorder

LocalAccess

A

DUTB

LAN BLocalAccess

B

64kbps

128kbps

256kbps

384kbps

512kbps

768kbps

T1/E1

T3/E3

xDSL

Cable

Fiber

----------------

Occupancy level

Qos Edge Router

1000BaseX

100BaseT Switch

100BaseT Hub

10BaseT

WLAN (~4Mbps)

-----------------

Occupancy level

Packet loss

General Model for Voice, Data or Video

5

TIA-921A (PN-3-0062RV2)New IP Network Impairment Model for IPTV

Core IPNetwork

Route flapping

Link Failures

One-way delay

Jitter

Packet loss

Packet Reorder

DUTB

LAN BLocalAccess

BADSL2

Bonded ADSL2

VDSL

WiMax

3G Wireless

Cable

PON

----------------

Occupancy level

Qos Edge Router

1000BaseX

100BaseT Switch

100BaseT Hub

10BaseT

WLAN (~4Mbps)

-----------------

Occupancy level

Packet loss

DUTA

New Model for IPTV

6

ITU-T G.1050 and TIA-921 Test Profiles

ITU-T Recommendation Y.1541 uses a similar approach, but there is not a one-to-one mapping.

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

Transaction data, interactive Less constrained routing and distances

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

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 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

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 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

9

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

10

ITU-T G.1050 and TIA-921 8 Impairment Severity Combinations

Impairment Severity Combinations

  Severity=> A B C D E F G H*

Impairment Units                

Profie A LOO % 50 30 15 5 0 0 0 0

Profile B LOO % 5 25 30 25 10 5 0 0

Profile C LOO % 5 5 10 15 20 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

MTU A bytes 512 512 1508 1508 1508 1508 1508 1508

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 % 0 1 2 4 8 15 30 50

MTU B bytes 512 512 1508 1508 1508 1508 1508 1508

LAN B Occupancy % 1 2 3 5 8 12 16 20

11

ITU-T G.1050 and TIA-921 LAN and Access Rates

Access Rates for Home Locations

Access Rates for Business LocationsLAN Rates for Business Locations

LAN Rates for Home Locations

• General – 133 LAN/Access Rate Combinations• IPTV Video – 3 LAN/Access Rate Combinations

Home Rates

Business Rates

LAN Rate LOO Represents

Mbit/s %

4 75 802.11b, 10BaseT hub

20 25 802.11g, 100BaseT hub

LAN Rate LOO Represents

Mbit/s %

4 20 802.11b, 10BaseT

20 20 802.11g, 100BaseT hub

100 60 100 BaseT switched, Gbit Ethernet

Access Rate LOO Represents

Toward core From core %

kbit/s kbit/s

128 768 40 Cable, ADSL

384 1536 50 Cable, ADSL

384 3000 10 Cable, ADSL

Access Rate LOO Represents

Toward core From core %

kbit/s kbit/s

384 1536 40 ADSL entry

384 3000 15 ADSL premium

1536 1536 40 T1

43000 43000 5 T3

LAN and Access Rates (New Revision of Standard/Recommendation) will change as network conditions change

12

TIA-921A (PN-3-0062RV2)New LAN and Access Rates for IPTV

Access Rates for Large Business Locations

Access Rate LOO Represents

Toward core From core %

kbit/s kbit/s

3,072 30,000 5 WiMax

13,000 13,000 20 3G Wireless, WiMax

Access Rates for Home Locations applications > 3Mb/s

Access Rate LOO Represents

Toward core From core %

kbit/s kbit/s

768 7,000 50 Cable, ADSL2, VDSL

1,024 20,000 20 Bonded ADSL2, VDSL

3,072 30,000 15 Cable, Bonded ADSL2, VDSL

3,072 50,000 15 Cable, PON

LANMbps

Access (Kbps)

To Core From Core

1 20 768 7,000

2 20 1,024 20,000

3 20 3,072 30,000

4 20 3,072 50,000

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

New LAN and Access Rate for IPTV

10 LAN/Access Rate Combinations for IPTV

13

Impairment Characteristics

Good

Bad

Severe

• General Model – 1064 ICs, IPTV 24 ICs• New IPTV Model – 80 ICs

Link Failure

Route Flap

Impairment Characteristics

14

ITU-T G.1050 and TIA-921 Example of Network Model Coverage (NMC) Curve

OR

Video Quality may also be plotted

15

Example: Using G.1050/TIA-921 to Test Video Quality

Video Stream output Received Video StreamG.1050 TIA921

IP Network Impairment Emulator

Video Streaming Server (VSS)

Video Quality Measurement

System

Video Streaming Client (VSC)

VLC Video Monitor

131A to 133H Impairment Conditions

3 Minutes per Impairment Combination

Video Quality Measurements

MPEG2 and H.264 Video

Streams

16

G.1050/TIA-921 IP ImpairmentsExample Video Testing

131A

131B

131C

131D

131E

131F

131G

131H

24 ICs

131A to

133H

17

Example Video Quality (V-Factor) – MPEG2G.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

18

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

19

Oth

er IP N

etw

orks

IP Transfer (Access and Core)

T-MGF

I-BGF

AS

UPSF

I/S-CSCF

SLF

ChargingFunctions

IWF

« Core IMS»

Mw

Mx

Mr

MgMj

Mi

Mp MnGm

Gq'

ISC/Ma

Cx Dx

DhSh

Ic

Rf/Ro

Rf/RoIb

Iw

Gq'

PS

TN

/ISD

N

SGFMRFC MGCF

MRFP

Resource and Admission Control Subsystem

Network Attachment Subsystem

e2

Ie

Mw

IBCFMx

Mk

UE

Ut

BGCF

MxP-CSCF

Example of How to Use TIA-921/G.1050 in ETSI TS 186-008-x

NGN IMS overview (from ES 282 007)

G.1050 TIA921

IP Network Impairment Emulator

20

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