Cooperation Based P2P Topology Adaptation Scheme towards Improving Search Performance

Topology adaptation as a widely used approach to enhance search performance has been studied from many ways (e.g. based on interests, lifecycle and so on). This paper presents a cooperation based peer-to-peer topology adaptation scheme (CPTA) which is from contributors point of view. All nodes are classified as providers or guiders according to their contributions to success ratio. Algorithms for constructing cooperative alliance (CA) are designed to enhance cooperation between roles so as to maximize their contributions. We present an analytical model on contributions and expected search performance. Simulation results further demonstrate the efficiency of our scheme.