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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 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 • 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.
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.
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.
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.
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
Discussion • Applications ?