Research On Remote Sensing Image Data Transmission Strategy Based On Peer To Peer Network

With the rapid development of remote sensing industry and the continuous launch of the earth observation satellite,there aremore and more type of remote sensing image data,the resolution is getting higher and higher,and the demand of remote sensing image data in various industries and scientific research institutions is increasing.At present,there are uncertain factors such as the load of different nodes,the status of the network,the waiting of the queue,the data storage of the nodes in the distributed remote sensing image distribution system,which result in the inhomogeneous load of various nodes,low image data transmission efficiency and so onin remote sensing image data distribution system.Aiming at the problems mentioned above,this paper presents a new rapid transmission strategy,which is mainly studied from the aspects of peer-to-peer network node selection and the expansion of node.The main contents and research emphasis of this paper are as follows:1.Research the relevant theory and technology of data transmission.Based on the analysis of the topological structure of distributed remote sensing image distribution system and the use of the existing data transmission technology,the remote sensing image data transmission strategy is studied.2.A fast cache node selection strategy is proposed.The data sequence of the data transmission is adjusted by the dynamic load balancing of the resource nodes provided by the static addressing and the participating data of the distribution center,and through the whole load balancing and the improved data transmission channel,the service efficiency of the remote sensing image data is improved.3.Proposed the active expansion strategy of nodes.By regularly synchronizing the data listand prejudging the hot spot data of the regional nodesthrough the mapping rules,and then actively push remote sensing image data to the plate node,increasethe reserve of hot spot data of the nodes,improve the rate of data transmission and the stability of the data transmission.4.Experimental verification.Based on the experimental data,the efficiency of the fast cache node strategy and the active expansion strategy is verified according to the data download rate,the stability of the data block downloading,and the proportion of the multi-source data orders.5.Practical application.In thehigh science and technology service platform,which is a subproject of high resolution earth observation project,use the high speed data transmission strategyproposed in this paper to improve the distribution rate of the image data of the distribution system.