基于轮询的高级在轨系统多路复用包时延分析

目前的高级在轨系统(AOS,Advanced Orbiting Systems)多路复用研究主要以仿真为主,很少有文献给出专门的理论分析.针对基于轮询的AOS多路复用包时延进行研究,通过采用排队论中非空竭限量服务的休假排队系统建立模型,并采用循环再生法进行分析,得到了多路复用包时延计算公式,并给出包时延的下限值.仿真结果表明,在包到达率取值分别为1,2,3包/s,在各种不同的下行速率(范围240~330 bit/s)之下,包时延的仿真值曲线均高于理论下限值曲线,从而论证了理论推导的正确性.研究结果可以为工程设计提供一定的参考作用.

Packet time delay of polling-based multiplexing in advanced orbiting systems

Most researches on multiplexing in advanced orbiting systems (AOS) were made by simulation, and few literatures got theoretical results. The packet time delay of polling-based multiplexing in AOS was studied. Mathematical model was established by using vacation queue system with non-exhaustive service, and it was analyzed through cycle regeneration method. A calculation formula of multiplexing packet time delay was derived, and the lower bound value was also obtained. Simulation results show that when the packet arrival rates are 1, 2, 3 packets per second and downlink rate ranges from 240 to 330 bit/s, simulation values of packet time delay are larger than the theoretical lower bound values, which proves the correctness of theoretical derivation. The results can provide reference for practical engineering design.