前向数据接入方式对导航星座网络通信性能的影响分析

对采用时分多址轮询建链体制的导航星座星间链路网络,为了指导星间链路网络地面前向数据接入的应用,分析了不同地面前向数据接入方式的星-星-地联合数据交互机制及其对网络通信性能的影响,并结合应用代价给出了综合评价和使用建议.以前向数据最快路径接入方式和固定节点接入方式为代表,分析了星间链路网络与地面间星-星-地联合数据交互机...

Influence of forward data access modes on navigation constellation network communication performanc

The influence of forward data access modes on the time division polling chain built navigation constellation inter satellite link network data interchange mechanism and communication performance was analyzed, based on which the evaluation and suggestion for the current forward data access application were given. Firstly, the satellite-satellite-station data interchange mechanisms of the quickest path and the fixed node forward data access modes were analyzed, and the corresponding topology and routing planning strategy were given. Secondly, based on the data processing models and typical simulation scenarios of the Walker 24/3/1 global navigation constellation and stations, the simulation and analysis of communication performances of capacity and transmission delay was carried out on the quickest path and the fixed node access modes, and the characteristics of network communication performance and data congestion on the two modes were compared. It is concluded that the quickest path mode has obvious advantages over the fixed node mode in communication performance. Lastly, the advantages and prices for application of the two data interaction mechanisms were evaluated, and the suggestion on proper application of the fixed node forward data access mode was given under the conditions of low communication capacity, low communication delay and high reliability.