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A Stable Approach for Routing Queries in Unstructured P2P Networks
  • A Stable Approach for Routing Queries in Unstructured P2P Networks

A Stable Approach for Routing Queries in Unstructured P2P Networks

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A Stable Approach for Routing Queries in Unstructured P2P Networks

In an unstructured peer-to-peer network, finding a document or resource is a difficult problem. The proposed system provides a query routing approach that accounts for arbitrary overlay typologies, nodes with heterogeneous processing capacity, e.g., reflecting their degree of altruism, and heterogeneous class-based likelihoods of query resolution at nodes which may reflect query loads and the manner in which files/resources are distributed across the network.

The proposed approach stabilizes the query load subject to a grade of service constraint, i.e., a guarantee that queries’ routes meet pre-specified class-based bounds on their associated a prior probability of query resolution. An explicit characterization of the capacity region for such systems is given and numerically compared to that associated with random walk based searches.

Simulation results further show the performance benefits, in terms of mean delay, of the proposed approach. Additional aspects associated with reducing complexity, estimating parameters, and adaptation to class-based query resolution probabilities and traffic loads are studied.

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