Abstract
Peer-to-peer (P2P) systems are constructed to provide resource sharing among interested participants (peers) in a dis- tributed and self-organized fashion. The way P2P networks are formed is critical to the overall system performance due to communications and network maintenance overhead. Mobile environments pose additional challenges on P2P networks due to heterogeneity of nodes, inherent limited resources, dynamic context and wireless network characteris- tics. This paper presents RobP2P, a robust architecture to construct mobile P2P networks and efficiently maintain the network state. RobP2P introduces a novel super-peer selection protocol based on an aggregate utility function that takes into account peers’ capability and context. It also presents an agile scheme through which super-peers can delegate their responsibilities to more powerful and stable joining or existing peers. Our simulation results show that the RobP2P is efficient, less prone to failure, and generates lower overhead traffic, while reliably maintaining the consistency of network state.
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