摘要
针对深空通信所具有的长延时、高误码、深衰落问题,提出一种增强型的深空文件传输协议(DS-FDP)。与CCSDS文件传输协议(CFDP)的对比仿真表明,两者在地球同步轨道(GEO)通信环境下性能相当;随着延时和误码率的增加,DSFDP的性能将显著优于CFDP;在1.35s单向传输延时(月球通信)、10-4误码率(深衰落)情况下,DSFDP比CFDP的传输时间缩短50%以上。因此,DSFDP可以适应较大的误码率和延时变化范围,尤其适合深空通信这种信号传输条件恶劣的极限通信环境。
In this paper,an enhanced file transfer protocol,named as DSFDP is proposed for the deep space communications network characterized by the long propagation delay,high bit error rate and deep fading.The simulation results show that DSFDP in the GEO communication environment is equal to CFDP and the performance would be significantly better than the CFDP with the increase of delay and bit error rate.In the scenario of the moon communication with one-way transmission delay of 1.35s and bit error rate of 10^-4,the transmission time of DSFDP is less than half of that of CFDP.Therefore the DSFDP is applicable to a wide range of bit error rate and delay variation,especially suitable for the deep space communication under the condition of deplorable transmission environment.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2011年第3期640-644,共5页
Journal of Astronautics
基金
国家863高技术项目(2007AA01Z2b6)
关键词
深空通信
文件传输
CFDP
Deep space communications
File transfer
CFDP
