基于竞争时隙的空间飞行器快速组网策略

Fast networking strategy of spacecraft based on competing time slots

主要研究适用于无初始时隙分配和无固定时间基准终端的分布式空间飞行器自组网的初始组网策略。针对空间飞行器网络拓扑范围大、节点数目少、协同组网任务具有临时性、可靠性要求高等特点,提出了一种基于时分多址(Time Division Multiple Access,TDMA)的竞争式组网策略,并建立马尔可夫决策模型计算出最优竞争概率,完成网络的快速建立。仿真结果表明,所提出的竞争式时分多址组网策略具有网络建立时间短、组网过程可靠性高的特点,提高了网络的快速性、灵活性和安全性。

This paper mainly studies the initial networking strategy of distributed space vehicle ad hoc network without initial slot allocation and fixed time reference terminal. In view of the characteristics of space vehicle network topology, small number of nodes, temporary collaborative networking tasks and high reliability requirements, this paper proposes a competitive networking strate-gy based on time division multiple access( TDMA), establishes a Markov decision model, calculates the optimal competition probabil-ity, and completes the rapid establishment of the network. The simulation results show that the competitive networking strategy pro-posed in this paper has the characteristics of short network establishment time and high reliability, and improves the rapidity, flexi-bility and security of the network.