Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

FP5

MOBILEMAN Berichtzusammenfassung

Project ID: IST-2001-38113
Gefördert unter: FP5-IST
Land: Italy

Cross-layer Middleware platforms

P2p systems provide an effective framework to realize decentralized and scalable data sharing among large sets of users. Furthermore the decentralized and peer-to-peer computing model is suitable for mobile ad hoc networks. However, in the project, using both simulation and experimentation, we showed that two well-known platforms, like Gnutella (un-structured) and Pastry (structured) exhibit poor performance in ad hoc environments due to low tolerance to dynamics such as nodes mobility.

To cope with these performance problems, we designed cross-layer versions of Pastry and Gnutella. The cross-layer version of Pastry (CrossROAD) and Gnutella (XL-Gnutella) exploit cross-layer interactions between a proactive routing protocol (OLSR) and the middleware platform mediated via the Network Status (NeSt).

Extensive performance evaluation studies (either via simulation or measurements) have shown that our cross-layer solutions provide significant performance gains when a middleware platform is implemented on top of an ad hoc network. More precisely cross-layer solutions are more adaptive and tolerant to ad hoc network dynamics such as nodes mobility and wireless link instabilities.

Reported by

Institute for Informatics and Telematics (IIT)
Via G. Moruzzi 1
56124 PISA
Italy
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