Research On The Impact Of Link Interruption On The Transmission Performance Of BP/LTP Network

Deep space has always been a fascinating and yearning place for human beings,and the exploration of deep space has always been one of the strategic priorities of all countries.With the increasing activities of deep space exploration and the tremendous amount of information in space-ground dialogue,a reliable and stable network protocol architecture is needed to support them.Delay/Disruption-Tolerant Network(DTN)is an effective solution for deep space communication.LTP(Licklider Transmission Protocol)protocol also came into being.DTN network architecture based on BP/LTPCL has been initially applied to deep space network.Frequent link interruption is one of the harsh characteristics of deep space environment The celestial body movement,node dormancy,malicious attacks and other factors will cause link disconnection,affecting data transmission performance.Therefore,this paper mainly focuses on the transmission performance of BP/LTPCL protocol architecture in the case of link interruption:This paper mainly analyzes the data interaction and transmission process,and builds the simulation experimental platform from two aspects of node simulation and link simulation.It's illustrated the specific impact of aggregation mechanism on data transmission by analyzing the change of transmission performance under different aggregation conditions.Aiming at the link interruption,this paper also analyses the data transmission under the influence of interruption from the point of view of the interruption's own characteristics,also establishes the mathematical model of the related performance indicators such as RTT and Goodput.On the basis of convergence verification,interruption experiments are designed on the simulation platform.The paper obtains the relevant indicators by observing the data transmission in the actual simulation environment,and compares with the theoretical valuesIn this paper,through model deduction and experimental simulation,it is shown that full use of use of aggregation strategy can improve link utilization and make transmit data transmitted more effectively.A mathematical model of interrupt transmission with/without bit error rate is established,and its accuracy and reliability are verified.It shows that in complex deep space environment,DTN network architecture based on BP/LTPCL can effectively overcome link interruption,cope with complex and changeable deep space communication environment,and improve the performance of data transmission.