QoS Research On Bearer Network Status-Aware Based P2P Application System

As the development of P2P technology and application, it has become the unavoidable and important problem for the existing Internet, and with these huge P2P traffic it brings many problems to the existing Internet.Without appropriate bearer network topology and routing information, P2P application often makes inappropriate or non-optimal choice in node selection.In order to solve P2P application traffic flood or disorder problem caused by the mismatch between P2P overlay and bearer network in topology and routing, many bearer network status-aware based P2P traffic optimization application systems have been proposed.On the one hand, it can save network resources and cost for ISPs or network operators and alleviate network congestion;On the other hand, it can guide P2P application in topology and routing policy, and improve the performance of content distribution, to make P2P users get performance booster. Realize a win-win situation finally. So it is necessary to do research on the bearer network status-aware based P2P traffic optimization application system.This paper aims to design and implement a QoS method of bearer network status-aware based P2P application system.It is based on the relay selection algorithm, comprised of the stable and reusable relay server.It can promote QoS performance and reduce measuring cost in the autonomous system when combining with operator's management,and realize the P2P traffic optimization.This paper is based on Triangle Inequality Violations phenomenon existing in Internet,and proposes one kind of relay service method of P2P application called Relay Service Scheme(RSS)and describes the detailed composition and use of the service system.This method takes AS connecting degree and AS valley-free counts into account,and verify the performance of the scheme with available Internet data set. This method can reduce more overhead than other relay selection algorithm. Futhermore,it is the first scheme to pick up relay as stable and reusable servers to form a relay network, which will get better domain QoS performance promotion when combining with operator's management, and reduce more measurement overhead. OMNeT++simulation platform is the basis of paper simulation. With the help of the simulation platform, this paper constructs AS level network topology, and simulate a real network environment.The relay service system and relay selection algorithm is verified through it,and also its concrete data of QoS promotion performance and the corresponding algorithm overhead, implementing difficulty are all provided.