Peer-to-peer approach for global deployment of voice over IP service

IP communication service over Internet has become most interesting research topic in recent years, as the next generation Internet applications are requiring the integration of voice, video and data in the single IP infrastructure. In this study, we focus on designing a scalable voice over IP routing architecture from the network control plan consideration, aiming at dealing with issues related to the global deployment of voice over IP service. Particularly, our technologies include: 1) Peer-to-Peer based call routing architecture. Peer-to-Peer approach can fully supports the variable network topology to satisfy the transition period of global voice over IP deployment in the next several years. We study the routing request forwarding protocol and routing update protocol with designing an efficient multipath routing algorithms to achieve better QoS (Quality of Service) performance. 2) Efficient voice gateway allocation schemes. When the call routing fails in the IP overlay, the call setup can automatically reroute to the PSTN (public switched telephone network) and fault tolerant service can be easily extended. We study how to support differentiated service to satisfy different user requirements. We conduct extensive performance evaluations on different architecture and algorithms. The evaluation results show that the load aware routing scheme can achieve much better performance than static selection scheme in terms of average call routing message delay. The experiment results also demonstrate that the weight based gateway allocation scheme can efficiently support call requests with different QoS requirements.