telecommunications industry associationtr-30.3/10-04-013 april 26-27, 2009
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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: [email protected]
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
3 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
1 P2P Captures
4 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
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
5 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
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
10 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
Identical YT-HD Views (5s average)
8-min HD view of Shuttle Landing
Run twice from home and once from lab
11 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
RTMP Capture – Out of the Box
12 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
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
13 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
3 Silverlight Lab Experiments
14 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
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!
15 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
Unconstrained
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Constrained 10 Mbit
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Constrained 6.5 Mbit
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Constrained 4.5Mbit
19 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
Comparisons
Yellow: Streaming Bitrate
Green: Frame Rate
Red/Blue: Video Bitirate
Ideal
4.5 Mbit
6.5 Mbit
10 Mbit
20 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
Silverlight Bandwidth Utilization (1s Averaging)
21 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
Silverlight Bandwidth Utilization (1s Averaging) – Detailed View
22 | TIA Contribution | April 2010 All Rights Reserved © Alcatel-Lucent 2009
15s Bandwidth Averaging