Keynote-P2PTV-GALE PPLIVE

8/14/2019 Keynote-P2PTV-GALE PPLIVE

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Private & Confidential

PPLive

A Practical P2P Live System with Huge Amount of Users

Gale Huang P2P Software [email protected] Synacast Media-Tech Corp.Sept. 2007
http://www.pplive.com/


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Agenda

What is PPLive? An online video broadcasting and advertising network An efficient P2P technique platform and test bench in the world

Common & Special charactersContinuous self-adjustment procedureKey points PPLive most concerns for


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1. What is PPLive?


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What is PPLive? An online video broadcasting and advertising network

Provides an online viewing experience comparable to that of traditional TV broadcasting75 million global installed base and 20 million monthly active users600+ channels on PPLive with content ranging from news, music, sports, movies, games, livevideo and other interactive services to a global audience

An efficient P2P technique platform and test bench

History of PPLive:

Bills story Inventor of PPLive core technology Dropped out of post-graduate program to start PPLive in dorm and grew the user

significantly in the first two years.

Introduction of PPLive

1.5 millionMonthly average concurrent users

11 hoursWeekly average usage time

2.2 millionPeak concurrent users

3.5 millionDaily active users

20 millionMonthly active users*

75 millionEstimated global installed base


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Industry Trends

Napster

BitTorrent

Skype

PPLive

File Sharing

Downloading

Video Streaming

VOIP

2001 2003 2004 2005

BasicApplications

AdvancedApplications

PPLive is well positioned to exploit the next explosive growth


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Introduction of PPLive Focus on P2P Streaming

Encoding &

Decoding

MPEG-4H.264

Digital Rights

DRMDigital Watermark

Napster/ KazzaeMule/ Poco

P2P file share

Bit Torrent/ Thunder Dudu Accelerate

P2P DownloadAccelerator

PPLive

P2P Streaming

SkypeHeadcall

P2P-Voip

xPlus/ ZCom/ Poco MagBox

P2P-Magzine

P2P technology

Streaming technology


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Introduction of PPLivedistribution view

PPLive is a P2P Live System Media Publish System P2P content delivery network End users PPLive player Multi-media formats Supported DRM Supported

Movie

Entertainment

Online Show

Sports


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Common and Different Characters


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Common points what topology of p2p architecture to be chosen

Tree based (multi-tree based)Mesh basedUnstructuredOther DHT based

How to organize peer nodes? How to make peer nodes know and communicate with each other ?

Find the partnersMake use of the partners

How to manage the resource? Most concern about the metric of the P2P System

Common characters


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Different points

Most different points

Viewing experiences is the most important metric Much more practical Feedback from the PPLive test bench itself

75m end users

Consider their viewing experienceTake responsibility of all usersPart of users have updated version which is under control ,before spreading to all of users

Ideas

Theory

PPLive test bench Feedback

Improvement


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Feedback network Test network Feedback ( Global)


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PPLive software Architecture

PPLive has centralized servers taking charge ofregistering, providing the source and bridging withother applicationsDHT based Super Node consists of stable SN andvirtual SN

Each SN takes charge some Channels in Live system ;while in VOD system, each SN takes charge of acertain areaIn each P2P group , we can assign a special p2palgorithm different with other groups

Overlay Network SN

Server

SN SNSN

SN

SSN

C

VSN

C

C

C

C

SNCandaditeResourse ListSNListPeerList

SN

SNListPeerList

Acess Server

Adapter ServerSource ServerClassical C/S or P2P

Network

One Channel, One P2P Group

One P2P Group, One P2P Strategy

Smart routing Algorithm

Global Distribution


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Peer node architecture

Peer node

Key point of the whole P2P System Implementer of the smart routing algorithm Hierarchical design A unified interface provided to the high level

applications

Disk Driver

File Management

IPTCP/UDP/Control

Route Management

P2P

Data Transmission

Resource Management

Media Service Storage Service

Live Streaming VOD File Sharing File Storage

PPLive Peer node architecture

Net

P2P

APP


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PPLive Software Architecture

SNSN

SN

SN

C

CC

C

C

C

C

C

C

C

Public Network

server

Peer

Peer

Peer Peer

Peer

Peer

Peer

Peer

Peer

Peer

Peer

Peer

Peer

Peer

Peer

Peer Peer

Peer

Peer

Peer

Pe er

Peer

Peer Peer

Peer

Peer

Peer

Network layer view

P2P layer view Global view


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PPLive Common Overlay

A Common overlay network contains Query queue(P2P orders)

Application related Real streaming VOD File sharing

Download from the query queue (How toexecute the orders)

Application independentAbility of uploading and downloading

Query Queue

R1

R2

R3

R4

R5

R6

...

Ping-pong layer

PP1 **

PP2 ****

PP3 ***

PP4*

...

R4 R7 R10 ...

R1 R3 R6 ...

R2 R5 R8 ...

R9 R16 ...

R1 QueryQueuePP1* pingpong

layer *representsca acit

Disk Driver

File Management

IP

TCP/UDP/Control

Route Management

P2P

Data Transmission

Resource Management

Media Service Storage Service

Live Streaming VOD File Sharing File Storage


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Continuous self-adjustment procedure


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1st Misunderstanding For most P2P System, it is

commonly thought: The moreusers look simultaneously thebetter view experience the userswill have.

Conclusion For most p2p system, especially

for streaming applications(bandwidth wasted and realtime requested application ), it isnot necessarily the truth.

User scale greatly influences thearchitecture;

Continuous self-adjustment

2200

18001100

650

450

250150

700

500

1000

1500

2000

2500

Jun 2005 Dec2005

Mar 2006 Jun 2006 Sep2006

Dec2006

Mar 2007 Jun 2007

Unit: Thousands

Nov. 2004 May 2005 Dec. 2006

Distributed IndexServer supported

Initial PPLive core withSingle Global Index

Chord based DHT isused for all Index Servers

Oct. 2006

Gossip based Peer communication mingled with DHT

Smart SN introduced tocorporate with peers

May. 2007

Unified p2p platformproposed to supportmulti-applications

Jun. 2007


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Private & Confidential 2nd Misunderstanding

Theoretical model can lead to the real performance evaluation

Conclusion Modeling the system has a big help to design and optimize the P2P application P2P Systems capacity can just be proved by the fact of real operation

1 PC server 10Mb distribution bandwidth 500kbps video 250,000 audiences 50,000 audiences from abroad

Source: PPLive database

Over 250K peak simultaneous users to watch the Super Girl Live, China,Q3 2005

1 PC server 10Mb distribution bandwidth 400kbps video 1,480,000 audiences

Source: PPLive database

A NBA play-off game with Huston Rocket, Live, China,Q2,2007


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3rd Misunderstanding Experimental environment can represent the real network environment.

Conclusion PPLive was also born from the CERNET, which is specially for educational useand very idealistic for P2P experiment

PPLive encountered many difficulties while walking out from CERNETHeterogeneous networkUnpredictable user pattern

Asymmetric networkPoor network condition, half of them are 512kbps bandwidth, while we run 400kbpsvideo on it

Stronger and smarter algorithm should be used


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Key points PPLive most concerns for


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PPLive Platform Strategy

Broadband Network Infrastructure

Content Provider Advertiser Services Provider End Users

VOD System File SharingLive System OthersDistributedStorage

P2P Content Deliver Network


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Continuous self-adjustment (cont)

Deeply improve the users viewing experience

Based on the P2P streaming technology Adapting for Chinese complicated network environmentIntegrate the multi high level applications into this platformOpen the part of the platform interface to public Let others join in this platform


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Thank you!

Question Time

PPLiveP2P changes our lives

Documents

Keynote-P2PTV-GALE PPLIVE