Delay/Disruption Tolerant Network and Its Application to Interplanetary Internet
Hongcheng Yan · Spacecraft Engineering · 2014
DTN(delay/disruption tolerant network)is an important technological approach to the implementation of IPN(Interplanetary Internet)which introduces a novel end to end overlay network architecture.In this paper,the characteristics of space mission related DTN network protocols,including BP(bundle protocol),LTP(Licklider transmission protocol),CFDP(CCSDS file delivery protocol)and Saratoga,are given first.Then,the technical characteristics of DTN routing algorithm and the software implementation of DTN are presented.Furthermore,the technical characteristics of DTN flight validation experiments conducted by NASA under various mission scenarios,including remote sensing,space station,relay communication and deep space exploration,are summarized.Finally,with regard to the development requirements of spacebased integrated information network of China,DTN networking issues demanding more focus are given,including system architecture,convergence layer protocols,routing algorithm and the design of gateway.