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The Effects of Node Cooperation Level on Routing Performance in Delay Tolerant Networks

Wireless networks in general, and delay tolerant networks in particular, requires a great deal of node cooperation in order to realize even basic functionalities such as routing a message from source to destination. However, in a typical DTN scenario nodes are severely resource constrained, a fact that might induce a non-cooperative behavior in order to save resources for the own good. To date, very little is know about DTN routing protocol performance in presence of different degrees of node cooperation.  In this talk, we make a first contribution in this direction by analyzing the effects of different degrees of node cooperation on the performance of routing protocols for DTNs. A difficulty in this investigation lies in the need of characterizing not only the expected delivery time of a packet, but also its distribution. Characterizing the distribution is fundamental to estimate the packet delivery rate of different routing protocols in presence of varying degrees of node cooperation. The results of our analysis are validated against results of extensive simulations, and shown to accurately predict network operational conditions in presence of partly cooperative node behavior.

Dal 12/01/2010-11.00 al 12/01/2010-11.00 , Aula didattica dello IIT (Aula A32 - vicino biblioteca)

Speaker: Paolo Santi

Responsabile: Paolo Santi

Attività: Algoritmica per reti wireless

Note: NB: Il livello di approfondimento tecnico della presentazione e' volutamente lasciato ad alto livello, con l'obiettivo di rendere il seminario comprensibile a chiunque abbia un Computer Science/Computer Engineering background.