ABSTRACT:

While peer-to-peer networks are mainly used to locate distinctive resources across the Internet, new interesting deployment eventualities are rising. Particularly, some applications (e.g., VoIP) are proposing the creation of overlays for the localization of services based on equivalent servants (e.g., voice relays). This paper explores the doable overlay architectures which will be adopted to provide such services, showing how an unstructured resolution based on a scale-free overlay topology is a good choice to deploy in this context. Consequently, we tend to propose EQUATOR (EQUivalent servAnt locaTOR), an unstructured overlay implementing the higher than mentioned operating principles, based on an overlay construction algorithm that well approximates an ideal scale-free construction model. We have a tendency to present both analytical and simulation results that support our overlay topology selection and validate the proposed design.