telecommunications industry associationtr-30.3/10-04-013 april 26-27, 2009

Document Cover Sheet

Project Number PN-3-0062-RV2

Document Title Over-the-Top Video Transport

Source Alcatel-Lucent

Contact Les J. Wu

Alcatel-Lucent

600 Mountain Avenue

Room 2b-219

Murray Hill, NJ 07974

Phone: 908-582-4964

Fax: 908-582-4964 Email: les.j.wu@alcatel-lucent.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 October 2009, all of which provisions are hereby incorporated by reference.

Abstract

Analysis and discussion of model input pcaps as well as other recent captures.

Telecommunications Industry Association TR-30.3/10-04-013April 26-27, 2009

Over-the-Top Video Transport

Les Wu

April 2010

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1 P2P Captures

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P2P Capture Comparisons

BT Upstream Comparison

0

500000

1000000

1500000

2000000

2500000

1 9 17 25 33 41 49 57 65 73 81 89 97 105 113 121 129 137 145 153

t*5

bit

rate

BT up up up2

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Contributed p2p

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Contributed p2p (15s integration)

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Voice Traffic

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2 TCP Delivery

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Bandwidth Utilization from TIA Model

0

1000000

2000000

3000000

4000000

5000000

6000000

7000000

8000000

9000000

10000000

mins

bits

/s

YT IPTV-vbr Hulu podcast silverlight

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Identical YT-HD Views (5s average)

8-min HD view of Shuttle Landing

Run twice from home and once from lab

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RTMP Capture – Out of the Box

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Network Utilization of NBCU Olympics Clip

1s bandwidth averaging from the wireshark capture

TCP based transport

Bandwidth utilization appears greedy

Initial bandwidth spike of 27.7 Mbit!

Avg bitrate of 2.4Mbit has much higher excursions

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3 Silverlight Lab Experiments

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Silverlight Lab Capture Scenario

Big Buck Bunny Encoded via MS Expression Encoder 1080p standard profile

VC-1, 10 bitrates from 230k up to 6Mbit

Pristine 1GB Lab Network

Unconstrained, 10Mbit, 6.5Mbit, 4.5Mbit Policing with Aune Box

Policing done with a 250,000 byte Commited Burst Size (CBS) Buffer

Results:

Protocol appears greedy with massive bandwidth spikes

Even though 6Mbit claimed available, Silverlight did not appear to actually stream to that rate delivering 2-3 Mbit video!

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Unconstrained

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Constrained 10 Mbit

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Constrained 6.5 Mbit

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Constrained 4.5Mbit

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Comparisons

Yellow: Streaming Bitrate

Green: Frame Rate

Red/Blue: Video Bitirate

Ideal

4.5 Mbit

6.5 Mbit

10 Mbit

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Silverlight Bandwidth Utilization (1s Averaging)

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Silverlight Bandwidth Utilization (1s Averaging) – Detailed View

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15s Bandwidth Averaging