P2P Traffic Control
From A to B: A Survey
Class Seminar
Distributed Systems
Rofideh Hadighi and Mehdi Cheshomi
University of Science and Technology Mazandaran, Babol
Email: {rhadighi, mcheshomi}@ustmb.ac.ir
Advisor: Hadi Salimi
Email: hsalimi@iust.ac.ir
8 July 2010
Agenda

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Motivation
P2P Traffic Generator Sources
Prerequisites For Traffic Controlling
Traffic Identification Mechanisms
P2P Traffic Identification
P2P Traffic Control
P2P Traffic Control Taxonomy
Conclusion and Open Issues
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Motivation
 Wide
Range of Applications
(Specially on Content Distribution)
•
•
•
•
File Sharing: Torrent, Kaza, Freenet, …
Streaming: PPStream, TvAnts, …
Collaborating: Chat, Online Game, …
Cloud Computing: P2P storage
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Motivation(Cont.)
 Millions
Users Over the World
• 40%-90% of Internet Traffic!?
• The Estimations Differ Very Much, Why?
 IT penetration, Culture, Politics, ….
 Limited Scope
• 40% is not even ignorable
 Makes Problems For ISPs
• Cost
• Effect on Other Network Services
P2P Traffic Must Be Controlled
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P2P Traffic Generator Sources
Signaling Information
• Indexing, Routing and …
 Content Exchanging

• Small to Large Files
• Video and Audio Stream
Content Exchanging >>
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Signaling Information
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Prerequisites For Traffic Controlling
Policy
Identification
Measurement
Control
Fig 1. Prerequisites of the Traffic Control
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Traffic Identification Mechanisms

Signature-Based
• Port-Based:
• Web: Port 80
• Kaza: Port 1214
• Payload-Based:
• Web : “GET” Statement
• Bit Torrent: “0X13Bit” Statement

Heuristic-Based
• Depended on Experience
• Constant Bit Rate
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Traffic of Stream
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Traffic Identification Mechanisms(Cont.)

Signature-Based
• Pros:
• Accuracy(Low False Positive)
• Practicable
• Cons:
•
•
•
•
•
Processing and Storage Overhead
Unable to Inspect Encrypted Payload
Unable to Indentify New Protocols
Application Dependent
Privacy Limitations
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Traffic Identification Mechanisms(Cont.)

Heuristic-Based
• Pros:
•
•
•
•
Low Storage Overhead
Application In Dependent
Capable to Indentify New Protocol
Flexible
• Cons:
• High False Positive
• Unrefined
• Complex Algorithm(Sometime)
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P2P Traffic Identification

Signature-Based
• Port Based
• Payload based

Non Payload Based
• T. Karagiannis and et al
• Heuristics:
 (Src,Dst) IP Pairs that use TCP and UDP together
 (IP,Port) Connection Graph
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P2P Traffic Identification(Cont.)
• F. Constantinou and et al
• Heuristic
• Network Diameter
Network Diameter=5
Fig 2. A P2P Network Schematics
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P2P Traffic Control

Other Control
• Rate Limitation
• Port Based
• Localization
• Caching
 P2P Caching is More Complex Than Web Caching
 X. Xiao-long et al, Global Evaluation Values Based
• Abstraction of IP and Port
• Peer Address, Peer group, …
• Network Policy
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P2P Traffic Control(Cont.)

Self Control
• Rate Limitation
• Peer Coordination Protocol
• Localization
• Local Peer Selection
• Super Peer
• P4P(Provider Portal For P2P)
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P2P Traffic Control(Cont.)
Table 1. Overview of P2P Traffic Control Taxonomy and Mapping
of It on Some Real Methods and Systems
Self Control
Other Control
Rate Limitation
Localization
PCP
Local Peer
Selection, Super
Peer, P4P
Port based,
PRX Filter
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Global Evaluation
Values based
Caching
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P2P Traffic Control(Cont.)

Other Control
• Pros:
• No Need to Change P2P Protocols
• Cons:
• Need to Identify Traffic
• Unrefined

Self Control
• Pros:
• More Effective Than Other Control Mechanisms
• Cons:
• Need to Change Protocols
• Underlay Awareness
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P2P Traffic Control(Cont.)

Port-Based:
• Pros:
• Simple
• Cons:
• Inflexible
• Deficient to new P2P Protocol Generations

Caching
• Pros:
• No Limitation
• Cons:
• Copy Right Law
• Difficult to Deploy
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P2P Traffic Control(Cont.)

Super-Peer:
• Pros:
• Reduce Traffic very much
• Cons:
• Effect on Robustness
• A Super Peer Per P2P Network
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Open Issues and Offers
Standardization
 Make Two P2P Networks to Work
Together
 Multi Protocol Super Peer
 Peer Awareness

• Network Catalog
Use Artificial Intelligence
 Bandwidth Usage Prediction
 Use Signaling Information for Traffic
Indentifying

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Conclusion
P2P Traffic is a Critical Challenge of
Internet
 It will be More Critical in Future By P2P
Streaming
 P2P Identification and Control
Mechanisms are Unrefined
 Many Challenges of P2P Traffic Control
are Open.

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P2P Traffic Control From A to B: A Survey
Questions
?
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