Performance Analysis Modeling for DTN-based File Transmission in Space Internet

????????? ??????????????? ????????? ?????? ?????????, ?????? ?????? ?????????, ??? ?????? ??????????????? ?????? ???????????? ?????? ?????? ????????? ????????? ???????????? ????????? ????????? ?????????. ?????? ?????? TCP/IP??? ?????? ??????????????? ???????????? ???????????? ????????? ?????? ??????????????? ????????? ?????????. ?????? ?????? ????????? ?????? ??????????????? ???????????? ?????????, ?????? ?????? ???????????? ???????????? ????????? ???????????? ???????????? ???????????? ???????????? ????????? ??? ?????? Store and Forward ????????? ????????? Delay Tolerant Network(DTN)????????? ???????????????. ?????? ??????????????? ????????? ?????? ??????????????? DTN????????? ?????? ????????? ????????? ?????? ?????????. ??????????????? ??? ????????? ?????? ?????? ?????? ????????? ?????? ?????????, ????????? ?????? ?????? ????????? ?????? Jet Propulsion Laboratory(JPL)?????? ????????? DTN ???????????? ???????????? Interplanetary Overlay Network(ION)??? ???????????? ??????????????? ?????? ????????? ??????????????? ??????. ??? ??????????????? DTN??? ?????? ????????? ????????? ???, ?????? ???????????? ????????? ????????? ?????? ???????????? ???????????? ??????????????? ?????? ?????? ???????????? Throughput??? ????????? ????????? ????????? ?????? ????????????, ???????????? ????????? ????????? ????????????????????? ????????? ???????????? ???????????? ???????????? ???????????? ????????? ????????????. ????????? ?????? ???????????? ?????? ???????????? ????????? ???, ?????? ???????????? ???????????? ???????????? ????????? ???????????? ??????????????? ???????????? ???????????? ?????? ??? ??? ???????????? ???????????? ??? ????????? ?????????. ?????? ?????????????????? ???????????? ???????????? ????????? ???????????? ????????? ?????? ????????????. ????????? 2?????? ???????????? CFDP ????????? ????????? ?????? ???????????? ??????????????? ????????? ???????????? Throughput ????????? ???????????? ????????? ?????? ????????? ????????? ????????? ????????? ????????? ????????? ????????? ???????????? ????????? ????????????. ?????? ?????? ???????????? ????????? ?????? ???????????? ?????? 0.282%??? ????????? ?????????Maste