The Study And Simulation Of Space Data Link Protocol Based On CCSDS

In order to satisfy the space exploration of our country, this theme analyses and studies several space data link protocols proposed by CCSDS.First, this theme introduces the development history about CCSDS space data link protocols, showing the necessity of studying and finally using the proposals in our country. Referring to the proposals of CCSDS space data link protocol and considering the practicality, after summarizing an efficient algorithm of transfer frame generating and confirming all parameters, we model TM and TC using OPNET which is a simulation tool. Then, we simulate the distribution of data source packets and COP-1 using the models.Referring to the general capability analysis methods, we simulate the capabilities of TM and TC which have been modeled. First, we simulate the throughout changes using TM model when the source packet and data field of transfer frame change continually. Then introducing the concept of effective throughout, we analyze the changes of effective throughout when Telecommand packet, data field of Telecommand segment and data field of transfer frame change continually. At last, taking an applied example into account, we analyze the possible effect when identity authentication mechanism is added into TC protocol.Because the purpose of modeling and simulating is that this theme can find methods to interfere CCSDS space data link protocols, at last this theme bring forward two interference methods based on effective throughout and identity authentication, which are important innovation points in this theme.