Resource Locating and Selection for Spatial Image Streaming on P2P Network

The authors explore non-linear content access mode of spatial data on virtual earth,and then adopt grid-based peer group for resource locating on top of traditional P2P locating method.Further,peer selection mechanisms to optimize the results of resource locating are discussed.Historical download speed records are combined to estimate the preference of peer so that high capacity and reliable peer can be chosen firstly.Two modes of our peer selection mechanism that are local optimal and non-equal probability have been tested through many simulative experiments.Results show the better effects with our peer selection mechanism comparing to random peer selection,and also tell that effectiveness of peer selection mechanism is related to application scenario such as peer number,file size and user behaviors.