双层卫星网络层间链路建立策略的研究

Research on Establishment Strategies of the Inter-layer Inter-satellite Link in Double-layered Satellite Networks

对高、低层卫星网络的层间链路的可建链特性进行分析,从而对层间链路的可见性和仰角限制进行研究,将层间链路的仰角限制转化为对层间链路长度的限制。在已有的链路长度最短策略、链路持续时间最长策略和链路剩余资源最多策略的基础上,将其中的建立策略进行结合,提出了链路的资源-长度策略和链路的资源-时间策略,并根据层间链路可建链的限制条件,对上述5种建立策略进行仿真分析。仿真结果表明,在对层间链路建立策略没有特殊要求的情况下,链路的资源-时间策略的性能相对最优。

The establishment characteristics of the inter-layer inter-satellite link( ILISL),including the visibility of ILISL and the limitation of the elevation of ILISL,in the high and low satellite networks,are analyzed,and the limitation of the elevation of ILISL is converted to the limitation of the length of ILISL.Based on the existing establishment strategies,including the strategy of the shortest length of ILISL( SLI),the strategy of the longest duration of ILISL( LDI) and the strategy of the most remaining resources of ILISL( MRRI),the strategy of MRRI + SLI and the strategy of MRRI + LDI are proposed by combining the existing establishment strategies. All establishment strategies are simulated and analyzed according to the limitation of the establishment characteristics of ILISL. The simulation results show that the performance of the strategy of MRRI + LDI is relative optimum under the case of no special requirements for the high and low satellite networks.