Transcript READ ME FIRST – THEN DELETE THE SLIDE

Multimedia content growth:
From IP networks to Medianets
Cisco-IEEE ComSoc Webinar. Sept. 23, 2009
Presented by:
Alexandre Gerber
AT&T Labs
© 2009 AT&T Intellectual Property. All rights reserved.
Application Growth
Landscape changed over the last 2 years
Downstream traffic per subscriber during the weekly busy hour
Multimedia
annual growth
rate per DSL
sub: 58%
Web
Multimedia
Multimedia #1 app for
DSL during busy hour
(40%) . A key driver
of smartphones too.
Other
100%
90%
80%
70%
60%
50%
6/25/2009
4/25/2009
2/25/2009
12/25/2008
10/25/2008
8/25/2008
6/25/2008
4/25/2008
2/25/2008
12/25/2007
10/25/2007
8/25/2007
6/25/2007
4/25/2007
2/25/2007
40%
30%
20%
10%
0%
DSL
© 2009 AT&T Intellectual Property. All rights reserved.
Smartphones
Page 2
Medianet challenges
•
Demand Growth:
–
–
•
Robustness and Operational Complexity:
–
–
•
How will networks evolve to handle the explosive growth in
digital content?
IPTV/VoD vs. OTT content distribution path will impact solution
How to move from Network Management to Application Aware
Network Management?
How to reconcile network performance and end user experience?
Creating a seamless end user experience:
–
Video anywhere, anytime (TV/Internet/Wireless)
Let’s focus on one of these questions:
How will networks evolve to handle the explosive growth in multimedia content?
© 2009 AT&T Intellectual Property. All rights reserved.
Page 3
Dealing with Multimedia Content Growth:
Three Observations
•
Users don’t care where the server is
Expect the return of hierarchical caching
– Expect joint optimization of network and application layer:
–
•
–
•
E.g. Anycast CDN
Same observation driving Cloud Computing
Video viewing will increasingly be “on demand”
Expect “switched video” delivery rather than broadcast
– Expect solutions that exploit multiple delivery techniques at network
and application layer
–
•
Opportunities for any solution that helps users manage
information
–
What can the network do to support information dissemination and
retrieval?
© 2009 AT&T Intellectual Property. All rights reserved.
Page 4
Dealing with growth of content
Optimizing Content Distribution!
Current P2P
protocols are not
efficient today:
Air Miles 25%
longer than HTTP
Distance traversed on
network
CDNs are today 2 to
3 times more
efficient than P2P
New capital-efficient delivery solutions will be critical for cost-effective
handling of the fast growing media traffic
=> Understand characteristics of content and improve distribution: Network
aware P2P, multicast, anycast, caching, etc.
© 2009 AT&T Intellectual Property. All rights reserved.
Page 5
Exploiting Multiple Delivery Mechanisms
Unicast of requested content works well in certain situations
• Low demand, sufficient resources
• Requests for rare content
• Unicast can provide quick response to user request
–
Can adapt quality to individual user’s bandwidth availability
Multicast to large number of consumers can be very resourceefficient
• Works well for popular content, especially with bursty and/or live requests
• Inefficient for less popular content, requests spread out over time
Peer-to-peer between user devices
• Works well for download & view, without tight start-up latency
• Good if upload bandwidth from user is large
All of these mechanisms should be able to work cooperatively to
achieve content distribution in an efficient and scalable manner
© 2009 AT&T Intellectual Property. All rights reserved.
Page 6
The Next Generation Network as an Information Aggregator
Multimedia content distribution: going one step further!
• Users want information of interest to them
• Publishers want to distribute information to interested parties
• What can the network do to help?
Tell the network to deliver “information” of interest (pub/sub)
– Ask the network to find “information” of interest (query)
– Ask the network what “information” I might be interested in
(recommendation)
– Manage micropayments, advertising, etc.
–
• Challenges
–
–
–
Scale: large number of producers and consumers
Coverage: distributed, rather than “centralized” search engine
Timeliness: users want some information NOW
Opportunity for new overlay network for content routing.
Network can become that key Information Aggregator!
© 2009 AT&T Intellectual Property. All rights reserved.
Page 7
Application Aware Network Management
Always an after thought…
Medianet requires ISPs to move from Network Management to
Application Aware Network Management.
What does it mean?
• The bottom line is the end user experience
Need to convert network metrics into application performance
• Networks need to provide these metrics
• Need to isolate application performance issues
Identify relevant information in the ocean of network measurements
End to end approach from the servers to the network to the end device
(e.g. STB)
© 2009 AT&T Intellectual Property. All rights reserved.
Page 8
Conclusion
•
Multimedia Content growth is driving network evolution
•
Content hybrid delivery solutions will take advantage of
information across layer boundaries
Network-aware applications
– Application-aware networks
–
•
The network will have the opportunity to become the information
aggregator
–
•
Scalable solution to the problem of “who to tell” and “who to ask”
Medianets should not forget MediaNetworkManagement!
© 2009 AT&T Intellectual Property. All rights reserved.
Page 9
Backup
© 2009 AT&T Intellectual Property. All rights reserved.
Page 10
XML Routing Overlay
XML
router
XML Overlay
Network
Data query
generation
Database
Subscriber
for alerts
IP Network
Infrastructure
Subscriber for
information
Publisher
•Publishers and Subscribers submit Content Descriptors (CD’s) to the network
• CD is mapped into single hash-id at first overlay router
• Network builds a fine grained Core-based distribution tree (CBT) for each ”CD”
© 2009 AT&T Intellectual Property. All rights reserved.
Page 11
Content Descriptors
Content Descriptors (CDs) act like “indexes” in a distributed data
base environment
•
CD can be a topic hierarchy; multiple hierarchies may be
supported (e.g., topics, geographic location)
International > Business > Oil
– News > U.S. > Politics
–
•
An XML schema path (root-to-leaf path) may also be used as
basis of hierarchically structured domain for constructing CDs
rss
<rss> <channel>
<editor> Jupiter </editor>
<item> <title> ReutersNews </title>
<link> reuters.com </link> </item>
<description> abc </description>
</channel> </rss>
channel
editor
item
title
description
link
abc
Jupiter
ReutersNews
reuters.com
© 2009 AT&T Intellectual Property. All rights reserved.
Page 12