P4P Routing Algorithm Design And Research

With P2P applications, especially P2P streaming media applications, rapid development, P2P network traffic is now taking up the majority of internet traffic in general, and this percentage is growing. As the P2P arbitrariness in the choice of nodes that has brought about an enormous pressure on the bearer network, so resulting negative effects of performance is more and more severe. P2P applications arbitrarily choose node is an important reason of excessive consumption of network resources. This is mainly derived from the P2P applications are lack of understanding of the underlying network, resulting in overlapping networks and P2P networks have a serious mismatch, causing a lot of P2P traffic often traverse the ISP network and backbone link. Yale University has proposed a network optimization technology for P2P, called P4P. P4P's main idea is: providing an explicit communication interface between P2P applications and ISP. P2P client (peer) can call the interface to receive network information, or request bearer network to allocation of network resources, thus allowing more efficient use of network resources and enhance the performance of P2P applications.This paper aiming at the current structured P2P system's locality of physical location and accessing resources.Based on advantages that P4P can sense network topology and status information. We have made a reference to P2P routing protocols and find a relatively applicable routing algorithm: Pastry in structured P2P routing algorithm. By the use of P4P technology, we research and design of a P4P routing protocol P4P-Pastry in which peers performed clustering to the same resources and the proximity of physical location of nodes. When routing, the node routes to the nodes which are physical adjacent to it and have the lowest cost of communication. In OVERSIM network simulation platform, theory analysis and the experimental results show that on the one hand, the algorithm proposed in this paper has realized localization download and greatly raised the data transfer rate, reduced the load in backbone network and enhanced the network performance. On the another hand, the algorithm can help the ISP to solve several problems in P2P business, such as the network traffic is uncontrollable and raising of localization download , decreasing in the transmission distance and reducing in backbone network load. So it makes the ISP and network users achieve a win-win situation.