Resource search optimization of P2P based on ISP and resource character

Although the exited unstructured P2P resource search algorithm can enhance the performance of resource searching, but it will generate lot of P2P traffic and will consume a huge network bandwidth. Consider the messages of Internet service provider (ISP) and the clustering of P2P networks, the article proposed an on-demand resource search algorithm which based on the ISP and the similarity of resource character. In process of searching resource, the algorithm first selects the nodes which are in the same ISP and the character similarity of which and search message are greater than a certain threshold to forward searching message, so traffic is controlled in a same ISP network maximized, thus the load of the backbone network and network egress is reduced. Simultaneously, make on-demand search in the searching process according to the numbers of user-needed resources. Experimental results show that the algorithm can effectively improve the performance of resource search and reduce the consumption of bandwidth.