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BeiDou satellites cross-regional communication path assignment model and resource management
International Journal of Distributed Sensor Networks ( IF 2.3 ) Pub Date : 2021-07-20 , DOI: 10.1177/15501477211033764
Sheng Liu 1, 2 , Di Wu 1 , Lanyong Zhang 1, 2
Affiliation  

Time division inter-satellite communication and ranging link assignment of BeiDou satellites have made important progress; however, there is still the unsolved issue of integrated communication between ground gateway, aircraft, or even ship, and the BeiDou satellites. Therefore, in this study, we develop a path assignment model based on the idea of clustering and Markov chain. The optimal path is determined by the objective function based on the maximum transition probability. The transition probability takes into account the communication environment, congestion status, aircraft mobility, and reduces the complexity of path assignment by hiding the topology in the region. At the same time, due to the limited resources of onboard computing, storage and bandwidth, we also design a resource management strategy based on task urgency, aimed at minimizing the unreasonable allocation index, to enable the readjustment of link application resources. Finally, the performance of the model and the strategy in average link handover times, link reliability, resource allocation fairness, and network quality of service is determined by simulation.



中文翻译:

北斗卫星跨区域通信路径分配模型及资源管理

北斗卫星时分星间通信和测距链路分配取得重要进展;然而,地面网关、飞机甚至船舶与北斗卫星之间的综合通信问题仍未解决。因此,在本研究中,我们基于聚类和马尔可夫链的思想开发了路径分配模型。最优路径由基于最大转移概率的目标函数确定。转移概率考虑了通信环境、拥塞状态、飞行器移动性,通过隐藏区域内的拓扑结构来降低路径分配的复杂性。同时,由于板载计算、存储和带宽资源有限,我们还设计了基于任务紧迫性的资源管理策略,旨在最小化不合理分配指标,实现链路应用资源的重新调整。最后,通过仿真确定模型和策略在平均链路切换次数、链路可靠性、资源分配公平性和网络服务质量方面的性能。

更新日期:2021-07-20
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