P2P File Sharing in VANET Fenggang Wu Dept. of Comp. Sci. and Eng., SJTU Dec.15 th 2011.

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Presentation transcript:

P2P File Sharing in VANET Fenggang Wu Dept. of Comp. Sci. and Eng., SJTU Dec.15 th 2011

What is VANET? Wireless Ad Hoc Networking ▫Decentralized type of wireless network MANET (Mobile Ad-hoc NETwork) VANET (Vehicular Ad-hoc NETwork)

What is P2P File Sharing BitTorrent Access resources from peer nodes rather than a server node. Overlay Network

P2P File Sharing in VANETs Object ▫Investigate a P2P file sharing scheme in VANETs

Challenge in VANETs Overlay network, regardless the location of the vehicular Limited upload and download bandwidth because of intermittent connection Hard to predict route (or no route at all) Segmentations: random sequence order performs poorly

Heuristic ICT (Inter-Contact Time) (rely to the more freq. met cars?) Sociable Cars (Storing the indices?) Popular Content (More copies?)

Straightforward Approach Indexing ▫Structured: 3G? ▫Unstructured: DHT  Sociable car maintain the index  Geographical hash Transferring ▫Network coding

Related Work System: VANET MOVE’07 AODV Network Coding: MobiShare’06, SECON’08 Content Discovery Tech: Computer Communication IR: ICDCS’09 P2P: Vedio Streaming: Wireless Days’09

Comments? Thank you!

Straightforward Approach Storing ▫Files are separated into segments of equal size(the size can be determined by the test) ▫Cars with the same interest share the file segments ▫Files that are more popular have more copies Querying ▫Geographical hash ▫Sociable car maintain the index