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ATP: Autonomous Transport Protocol

ATP: Autonomous Transport Protocol. Tamer Elsayed, Mohamed Hussein, Moustafa Youssef, Tamer Nadeem, Adel Youssef, Liviu Iftode (Poster at SIGCOMM 2003) URL: http://www.cs.umd.edu/~moustafa/papers/cs_tr_4483.pdf Presented By: Arati Baliga. Motivation.

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ATP: Autonomous Transport Protocol

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  1. ATP: Autonomous Transport Protocol Tamer Elsayed, Mohamed Hussein, Moustafa Youssef, Tamer Nadeem, Adel Youssef, Liviu Iftode (Poster at SIGCOMM 2003) URL: http://www.cs.umd.edu/~moustafa/papers/cs_tr_4483.pdf Presented By: Arati Baliga

  2. Motivation • User applications need to move in a ubiquitous environment. • Users should be allowed to change networks and hosts seamlessly and communication should continue. • Traditional TCP/IP does not allow us to do this. • Mobile IP allows host mobility. But user is still bound to the same host.

  3. ATP: Features • It does not enforce any naming scheme on the user application. The application is responsible for uniquely identifying the endpoint. • The endpoints of a transport connection are defined as contents in the P2P network. • Mobility of the endpoints is handled via the P2P network by dynamically changing the mapping between the endpoint and the host. • The ATP layer is responsible for moving segments to the destination and the acknowledgment to the source regardless of their current mapping in the P2P network.

  4. ATP: Features • Since a P2P network is built as an overlay network, the ATP layer in the intermediate nodes between the source and destination endpoints can actively participate in the connection • Data is transfered by a combination of active and passive operations • The decision to whether to use the active or passive modes can be taken by a local policy on the node running the ATP protocol.

  5. ATP : Typical Scenario

  6. Instance Based Network (IBN) - Features • Content-node mapping: The IBN user can ask the IBN to map a content to a particular node. • Content communication: Application endpoints, defined by contents, can send messages to other. • Instance-based routing: The IBN can route a message to a specific content instance or to the nearest instance • Replication: The IBN replicates the stored contents in order to provide fault tolerance. • Caching: Nodes along the query path can cache a content to provide fast answers to future queries.

  7. System Architecture

  8. IBN Node Architecture

  9. Instance Based Naming • IBN addressing • Content is Addressed using a name X and an instance • identifier (I1,I2,…In) • (Logfile: 1,0,1) to represent the version 1.01 of the logfile. • Uses closest semantics

  10. IBN Routing

  11. ATP Connection Establishment

  12. ATP Basic Mode

  13. Discussion • Applications ?

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