Mobileman Peer-to-peer and WiFi Jon Crowcroft The Computer Laboratory University of Cambridge

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Presentation transcript:

Mobileman Peer-to-peer and WiFi Jon Crowcroft The Computer Laboratory University of Cambridge

Mobileman People and Projects in Cambridge Faculty: Jon Crowcroft, Ian Pratt Research Staff: Sven Ostring, + PhDs: Rajiv Chakravorty & Meng How Lim Projects: COM(vodafone) CMI MobileMAN

Mobileman Mobileman Kickoff Meeting Pisa, 5/11/02 P2P & WiFi Spectrum Economics

Mobileman Analysis of Self Organisation It has been noted that peer-to-peer and ad hoc wireless networks both use techniques of self organisation We would like to examine this similarity properly Analyse which particular techniques are useful (e.g. routing, load management, etc) See if we can create a next generation ad hoc wireless net – one step beyond the 2 level system in terminode networks (perimiter + spine) Infocom + followup proxinet paper…soar?

Mobileman Location Services Experiment P2p makes use of techniques such as consistent hashing, rabin fingerprints, bloom filters and so on, for mapping key to location Perhaps a similar model could be used for addressing Would note that these often lead to very poor latency Techniques such as landmarks, shortcuts, lighthouse, chord etc are worth looking at Paper submitted to IPTPS on “lighthouses”

Mobileman Notification Services Could look at Scribe (P2P based Event service based on Pastry) Could look at event services as driving model – could be information or applications like games…. Problem of effort levels! Have to enlist PhDs at cambridge!!!…

Mobileman Performance Enhancing Overlays P2p and overlays are dual. We would like to look at the interaction between overlays and underlying mobile/wireless dynamics We have looked at a system of TCP proxies to mitigate performance problems in wireless access nets (have Infocom 03 paper on this) – we could extend this to ad hoc multi-hop/multi-path systems too Other overlays (e.g. application specific routing and trans-coders etc are of interest too.

Mobileman Cambridge Mobileman P2P Research Topics Analysis Experimental Application Platform Tests for Performance

Mobileman Relevant p2p technologies Pastry/Scribe/Xenostore – Storage, notification, searching Consistent Hash + location Eternity, Freenet Privacy, persistence,caching Robustness Rabin fingerprint, bloom filter ALAN/Overqos/RON App level routing