A resource discovery method based on multi-agents in P2P systems

Abstract

A peer-to-peer (P2P) system consists of a number of decentralized distributed network nodes that are capable of sharing resources without centralized supervision. Many applications such as IP-phone, contents delivery network (CDN), distributed computing adopt P2P technology into their base communication systems. One of the most important functions in P2P system is locating resources, and it is generally hard to achieve due to the intrinsic nature of P2P, i.e. dynamic re-configuration of the network. In this paper, we propose an efficient resource locating method in pure P2P system based on multi-agents. The model of our system is a DHT base P2P system that consists of nodes with DHT (high performance nodes) and nodes without DHT (regular nodes). All the resources as well as resource information are managed by cooperative multi-agents. Migrating multi-agents are expected to reduce communication traffic in the network. Efficient migration is achieved through the clustering of nodes that makes correlated nodes in a group by the logical similarity. The numerical experiments through simulation have shown a significant reduction of generated messages. © Springer-Verlag Berlin Heidelberg 2007.