Abstract
Broadcast search strategy is widely used and plays a key role in unstructured Peer-to-Peer applications, many of which exhibit a power-law like degree distribution. Understanding and improving scalability and efficiency of broadcast search in power-law networks can give huge benefits to these systems' search performance. In this paper, we analyze the impacts of topology structure and peer degree's heterogeneity. Then, we propose a broadcast search strategy combined with index replication technology and evaluate its search performance in power-law networks. The experiment shows broadcast search with index replication can achieve much better search performance in both reducing peers'workloads and improving search success rate.
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