论文标题
在跨界距离上用于光学无线卫星网络和光纤陆网网络
On Crossover Distance for Optical Wireless Satellite Networks and Optical Fiber Terrestrial Networks
论文作者
论文摘要
与光纤陆地网络（OFTNS）相比，光学无线卫星网络（OWSN）可以提供较低的延迟数据通信。交叉函数可以计算OWSN和OFTN的交叉距离。如果地球上的两个点之间的距离大于交叉距离，则切换或从OFTN转移到OWSN会导致这些点之间数据通信的延迟较低。在这项工作中，我们将先前提出的交叉函数扩展到场景中，以使中间卫星（或啤酒花）在OWSN中的Ingress和Egress卫星之间合并，以在这种情况下对交叉距离进行更真实的计算。我们考虑具有不同卫星高度的不同OWSN和具有不同光纤维折射率的不同OFTN，我们研究了啤酒花数对激光间卫星间链路（LISL）的交叉距离和长度的影响。从数值结果中可以看出，交叉距离随啤酒花数量的增加而增加，并且在OWSNS中较高的卫星高度和OFTNS中较低的折射率下，这种增加较高。此外，观察到交叉距离和LISL长度之间的反向关系。随着啤酒花数量的增加，LISL的长度与交叉距离相反。
Optical wireless satellite networks (OWSNs) can provide lower latency data communications compared to optical fiber terrestrial networks (OFTNs). The crossover function enables to calculate the crossover distance for an OWSN and an OFTN. If the distance between two points on Earth is greater than the crossover distance, then switching or crossing over from the OFTN to the OWSN results in lower latency for data communications between these points. In this work, we extend the previously proposed crossover function for a scenario such that intermediate satellites (or hops) are incorporated between ingress and egress satellites in the OWSN for a more realistic calculation of the crossover distance in this scenario. We consider different OWSNs with different satellite altitudes and different OFTNs with different optical fiber refractive indexes, and we study the effect of the number of hops on the crossover distance and length of a laser inter-satellite link (LISL). It is observed from the numerical results that the crossover distance increases with an increase in the number of hops, and this increase is higher at higher satellite altitudes in OWSNs and lower refractive indexes in OFTNs. Furthermore, an inverse relationship between the crossover distance and length of a LISL is observed. With an increase in the number of hops, the length of a LISL decreases as opposed to the crossover distance.
