Modeling and Verification of File Delivery Delay for LTP in Complex Deep Space Networks
Guo Yu, Zhenxing Dong, Yan Zhu · Chinese Journal of Space Science · 2022
Aiming at the problem that the models of file delivery time for Licklider Transmission Protocol (LTP) established in simplified scenarios can’t be directly applied to complex scenarios, a theoretical model of file delivery time for LTP in complex deep space networks is proposed. Previous research has focused mainly on establishment of a data transmission model for LTP in simplified scenarios with one to two hops or multihop scenarios with a custody mechanism of the Bundle Protocol (BP). However, the research results are not applicable to communications in complex deep space networks without the custody mechanism of BP that is more suitable for deep space communications with LTP. Firstly, the transmission mechanism of LTP in complex deep space networks is analyzed. Then, the theoretical model of file delivery time for LTP in complex deep space networks is established based on the analysis of the transmission mechanism before. Finally, a simulation verification platform is built to analyze the correctness and advantages of the model. The results show that the calculated results of the model are in good agreement with the experimental results, and the model proposed is more suitable for complex deep space networks than the models based on simplified scenarios.