Research On Topology-aware Peer-to-peer Network Base Whois

Structured peer-to-peer systems are often built on the overlay network which neglects the underlying of the Internet. P2P systems which based on DHT technology map keys to ID identifier then construct a overlay network by using the identifier.This design makes structured peer-to-peer systems have good performance in expansibility and fault tolerance, however it also resultes in many problems on communication efficiency and system load.In this paper , we focus on the problem of the high-delay route and trans-regional flow then we propose one topology-aware overlay network named G-Chord to structure a new geographic peer-to-peer network. Accoring to the information submited by ISP in internet registries, this thesis extract the key information and use a geocode which shows the geographic location and ownership information of ISP uniformly to build IP geographic information database.The thesis raises a geographic identifier method to build overlay network. In this method, we get prefix identifier value by hash the geocode value and it makes nodes in the same district get the same prefix identifier then they are neighbours in the overlay network. It solves the problem of topology mismatch.Comparing with current algorithms, the algorithm in the etheis has several significant advantages: firstly, the process of achieve topology-aware does not generate additional traffic and reduces burden of network. Secondly , algorithm is reasonable and does not change the P2P resource search mechanism.It has high feasibility. Simulation experiments show that the design method can significantly reduce the cross-border traffic, reduce the communication delay.