The Design Of Simulation Demo Platform In Deep Space DTN Network

With the increasing of the exploration in deep space, the demand to transferdata and files is also increasing in deep space. However, traditional single-nodecommunication has not well suited for deep space communications under extremeconditions. To cure this problem, Kevin et al. proposed Disruption TolerantNetwork (DTN) by introducing the multi-group network communication relaynodes.DTN greatly enhances the effectiveness of the transmission in deep spaceexploration. Storing-forwarding, custody transfer and other functions effectivelysupport high delay, long propagation distance, high energy loss and frequent linkdisruptions and other characteristics of the heterogeneous networkinterconnection and interoperability.This dissertation firstly achieves a set of space-oriented file transfer DTNnetwork architecture based on High Level Architecture (HLA) by utilizing C++programming language. It designs data interface, deep space environmentsimulation, the number of simulation capabilities with multi-node link-level andnetwork-level integrated simulation platform. In deep space transmission modulecommunication system based on HLA simulation demo platform, this simulationdemo platform is extend into transmission relay network and a deep space tworelay federate design is completed. Also, according to the needs of DTN system,the data collection schedule federate is increased and each member of therealization of the Federal is descripted in detail. Secondly, a delay NAK typeCFDP protocol is used to test the DTN performance. Finally, by utilizing C++programming language, completed the simulation demo to transmit data fromMars to the ground station with multiple relay nodes cooperatively based on thedelay CFDP NAK protocol.This simulation platform provides ground simulation demonstrations andvalidations for new deep-space communication theories, new systems and newtechnology (e.g., multi-hop relay, store and forward, and DTN networks), carriesout analysis tools and testing methods for basic theories and key deep spacecommunication studies.