CodeTorrent: Content Distribution Using Network Coding in VANET

Lee et al

manet vanet vehicular networks p2p file sharing bittorrent

@inproceedings{lee:mobishare-2006,
  title={{CodeTorrent}: Content Distribution Using Network Coding in {VANET}},
  author={Lee, U. and Park, J.S. and Yeh, J. and Pau, G. and Gerla, M.},
  booktitle={1st International Workshop on Decentralized Resource Sharing
             in Mobile Computing and Networking},
  pages={1--5},
  year={2006},
  organization={{ACM}}
}

Most MANET P2P work focus on topology dynamics, but other problems exist as well

• Errors in the wireless channel
• Network density and size (tens of thousands in VANETs)
• Non-cooperative nodes
  • If they're not all in a single organization, as they wouldn't be in a VANET, people may not want to act as relays

Restricts neighboring peers in the "overlay" to physical neighbors

Applies network coding, exchanging coded frames rather than pieces

Initial seeds broadcast torrent to neighbors

Interested nodes contiunally broadcast requests for that torrent until they have received enough coded frames to have the whole file

Nodes promiscuously listen to packets

Seeds are occassionally rebroadcast