Research on analysis of factors influencing terrestrial transmission efficiency of satellite data files

The paper firstly proposes two factors influencing transmission rate of satellite data file, the number of files and threads. The paper uses the control variate method to design the test scheme of the transmitting satellite data file, and changes the values of variables for lots of repeated tests to achieve the mean transmission time. And the paper compared the file transmission rate under three different variables, which draws the conclusion that the transmission efficiency of using single-file and multi-thread variable combination is the best. And the paper makes deep study on the selection of the number of threads. In the test environment of network delay of 50ms, the transmission time of using 3 or 4 threads to transmit data files is short, which proves that the number of threads transmitting files needs to be determined by the network environment.