Author(s): Wolfgang Kellerer (DoCoMo Communications Laboratories Europe), Gerald Kunzmann (Technische Universität München) & Stefan Zöls (Technische Universität München)
	Tutorial presented at : IEEE International Conference on Communications 2007 (ICC-2007)
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Peer-to-Peer (P2P) systems can be regarded as decentralized and self organizing overlay architectures, independent of specific access networks. Self organization makes them robust and flexible to dynamic changes without provider interaction. Their main objective is to support to find and use distributed resources. P2P technologies have thus received an increased interest in academia and also in industry in different application areas, not limited to file sharing, but also in communication applications such as Skype. The potential of P2P is in the realization of novel applications (user generated content, community based services) and also in applying its principles to use existing resources in a more clever way to save infrastructure cost. This tutorial explains basic principles of Peer-to-Peer communications and selected advanced issues. We first explain the concepts and algorithms of structured and unstructured P2P systems, which are the two main concepts used for resource lookup. Both concepts will be explained and illustrated with examples about analysis, traffic evaluations and applications. We further elaborate on basic algorithms for P2P data delivery taking place after a resource is found (example: BitTorrent). Advanced issues include selected topics in hierarchical P2P systems, P2P applications, such as Voice over IP systems, P2P security, and P2P for mobile communications and mobile ad hoc networks. We conclude with a discussion of industry perspectives on P2P.

Part Number and Titles:

• Part 1a: Introduction and principles (1) (24:47 – 26 slides)
• Part 1b: Introduction and principles (2) (14:20 – 18 slides)
• Part 2a: P2P Lookup – Unstructured P2P (22:36 – 27 slides)
• Part 2b: P2P Lookup – Structured P2P (1) (16:13 – 14 slides)
• Part 2c: P2P Lookup – Structured P2P (2) (22:21 – 18 slides)
• Part 2d: P2P Lookup – Structured P2P (3) (31:32 – 15 slides)
• Part 2e: P2P Lookup – Hierarchical P2P (28:51 – 19 slides)
• Part 3: P2P data delivery (18:16 – 16 slides)
• Part 4: P2P security (13:59 – 10 slides)
• Part 5: P2P applications (26:31 – 21 slides)
• Part 6: Mobile P2P (25:56 – 22 slides)
• Part 7: Summary and industry perspective (11:29 – 13 slides)

Total Presentation Time:

4:16:51 hrs.

Total Number of Slides:

219