Research On The Multiplexing Technology Of The AOS Spatial Channel Based On Self-Similar Traffic

With the rapid development of spaceflight technology and in order to meet the requirements of data transmission and management system in complex space mission,CCSDS developed the advanced orbiting system(AOS),a number of researches which have shown that network of any type is characteristic of self-similar have exsited.So this thesis does the study on the AOS spatial channel multiplexing under self-similarity traffic.Firstly,this thesis does the analysis on the packets channel multiplexing under the self-similarity of network traffic.At first,the analysis establishing the model of source packets with self similarity,and adding the Non-exhaustive Service model and the regeneration cycle method.Then we deriving the theoretical formula of average frame generation time and average packet delay in the efficiency frame generation algorithm.And we also deriving the theoretical formula of the multiplexing efficiency,average frame generation time and average packet delay of the adaptive frame generation algorithm in the self-similarity of network traffic model.At last,we do the simulation on the theoretical formula of the two frame generation algorithms.The simulation presents that the theoretical formula curves and the simulation curves are fitted well,which verifying the correctness of the theoretical formula.The results of the research can provide a theoretical basis for engineering design.Then,this thesis does the virtual channel scheduling algorithm under the self-similarity of network traffic.We do the simulation on the combining the scheduling algorithm of moving boundary based on frame urgency,traditional dynamic priority scheduling algorithm and the scheduling algorithm based on frame urgency with the combination of the virtual channel scheduling algorithm and the frame generation module,and then making the analysis of them.The simulation presents that the scheduling algorithm of moving boundary based on frame urgency can obtain better system performance than the other two algorithms in on the system with the average scheduling delay,the maximum time delay,the channel utilization ratio and so on.The results of the research can provide a theoretical basis for engineering design.