Research On The Location-Awareness In Bt-Like Peer-to-Peer Petwork

Recently, lots of research reveal that the traffic on the network is not only composed of the traditional types of traffic such as FTP, Pop3, SMTP and so on. Peer-to-Peer network is a new type network that users take advantage in resource share. P2P, as a new network scheme prior to the existing C/S scheme, has inspired not only many researchers worked in the information technology field, but also been attractive to many other people. And now, P2P technology has been one of the most hot research fields which leading the science. P2P technology significant influences traffic because it consume much of bandwith. A big portion of P2P traffic is repeated and unnecessary because of its loose management architechture.According to the definition of Peer-to-Peer Working Group Committee, P2P can be used in the file sharing, distributed computing and so on. But file sharing is the dominant P2P application.BitTorrent is an popular P2P application which is focus on file sharing. It uses muti-sources download mechanism to get great download performace. In addition, user download resources totally for free. Therefore, it becomes one of the most popular download application. Meanwhile, traffic genarated by BT makes the network over burdened.P2P networks are often constructed without considering the underlying physical network and the logical neighbor peers are chosen randomly. So the P2P overlay network mismatch the physical network. The mismatching problem limits greatly the performance gain from P2P and abuses the resource of the physical network infrastructure. This paper discusses the location-awareness problem in BitTorrent-like P2P networks. First, we build simulation envioronment based on campus network and the location-aware problem in BT network is proved by a measurement study. Sencond, we study other work about location-aware problem. Third, we propose a method named cache server system, which is based on caching, improve network performance. The cache server system can reduce the traffic between networks and the cost of network operators.