Modelling of VoIP Overlay Routing using Graph Transformation

摘要

P2P VoIP traffic potentially suffers from Quality of Service (QoS) issues such as packet loss, jitter and echo. Packets loss and jitter are mostly caused by the reconfiguration in the overlay topology and peer dynamism in the P2P ar-chitecture. Peer dynamics and complexity of the P2P net-work make it hard and expensive to validate these solutions through testing and traditional simulation techniques. We are using Skype as case study and we address the issue of QoS by modeling network using graph transformation, and using stochastic analysis and simulation for validation.