关键词: 对等网络, 互惠能力, 自身能力, 外部环境, 拓扑优化

Abstract:

Efficient topology optimization algorithms are one of the research hotspots in the domain of unstructured P2P networks. In view that the existing P2P network topology optimization algorithms are mostly based on an ideal network environment, and the selfcapacity and externalsurroundings of nodes are not considered comprehensively, we present a topology optimization algorithm based on reciprocal capability in P2P networks. The reciprocal capability of nodes is calculated according to two aspects: selfcapacity and externalsurroundings, based on which the topology of the unstructured P2P network is optimized. Analysis and simulation show that the proposed algorithm is capable of forcing nodes of lower reciprocal capability to the margin of P2P networks, reducing their impact on the overall performance of the network and effectively improving the search efficiency of P2P networks.

Key words: peertopeer (P2P) network;reciprocal capability;selfcapacity;externalsurroundings;topology optimization