How are commercial IPTV services responding to P2P Streaming Video services?
Presented by:Roland Krystian Alberciak
Roadmap
Introduction PPLive: current status and insights What commercial services are doing Conversation with IPTV-for-pay
service
Introduction
Network and Operating Systems Support for Digital Audio & Video (NOSSDAV) conference
Panel session: Large Scale Peer-to-Peer Streaming & IPTV Technologies
PPLIVE
Released in 2004 by “Bill” who dropped out of post-grad school in order to deploy software in dorms
Claims: Sept 2007: 3.5 million daily users Jan 2006: 400,000 daily users Weekly average usage time - 11 hours
Lots of foreign content [especially China]
PPLive limitations Findings show that PPLive peers are
“impatient” – only use pplive when actively watching.
PPlive now claims to provide DRM controls Questions for p2p streaming:
How to enable channel selection based on user interest?
VOD? Render multiple channels for simultaneous
viewing? Efficient media streaming?
RealNetworks: Adopting P2P No need for large scale server farms which
only get used a few times of year for rare and infrequent events
P2P accomodates popularity, flash crowds Bittorrent distribution and superseeding
have been shown to cause b/w cost savings Problems: Though superseeding saves
bandwidth, mean download rate was substantially lower.
Music workloadMusic Workload - %BW Savings over HTTP
Impact of SuperSeeding when Max UL = 160Kbps
-10
10
30
50
70
90
6 12 24 48# Clients
%B
W S
avin
gs
W-3000x160 W-3000x160 ss
W-1500x160 W-1500x160 ss
W-750x160 W-750x160 ss
ss=superseedW-d x u =WAN peer dl-rate x up-rate
Music Workload - Client DL RateImpact of SuperSeeding when Max UL = 160Kbps
0
50
100
150
200
250
300
350
400
450
6 12 24 48
# Clients
Mea
n d
ow
nlo
ad r
ate
(Kb
ps)
W-3000x160 W-3000x160 ss
W-1500x160 W-1500x160 ss
W-750x160 W-750x160 ssss=superseedW-d x u =WAN peer dl-rate x up-
How to scale iptv
How to distribute content? Data Centers? CDN’s? P2P was chosen, since it scales best to
‘flash crowds’ (ie: olympic viewership of 2.5 billion viewers)
P2P traffic will have more locality P2P transcoding P2P will become ISP friendly
Iptv operators want to…
Capitalize on the loading time for a channel during channel switch to provide ads
Recognize that most people who use IPTV do so while doing ‘other stuff’
A la carte pricing? [debatable]
IPTV-service operator conversation
Became very ‘animated’ when asked about thoughts on p2p streaming video and how it may influence his/her business
Conversation continued Observ.: Unlike Bittorrent, IPTV requires
minimum speed to operate Claims: Few peers have enough upload
bandwidth to support 2 or more peers Claims: more viable in other countries than
US, like Japan, Korea, Sweden DSL for home users goes to 700kbps-8Mbps Compared with 100Mbps in Japan/Korea and
even claimed 40 gigabits/s in Sweden Believes multicast will be successful in the
future
Questions?
Sources
ACM SigComm 2007 Keynote speech US Internet stuck in the slow lane. Works cited
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