Jul 2026· International Journal of Satellite Communications And Networking· 0 citations· 24 references
Abstract
The railway communication network serves as the backbone of modern railway systems. However, in special operating environments such as wilderness and desert regions, terrestrial networks often fail to provide effective communication support, thereby compromising operational safety and user experience. To address this issue, low Earth orbit (LEO) satellite systems are considered a promising complementary solution. A coverage model tailored to railway scenarios is first established, incorporating coverage effectiveness, reliability, and regional heterogeneity. Subsequently, a survivability performance function is constructed based on inter‐satellite link establishment relationships. Furthermore, typical transportation hubs at representative time instants are selected to evaluate the communication capacity of the constellation, and a corresponding cost model is developed. Finally, an improved multiobjective particle swarm optimization (IMOPSO) algorithm is employed to solve the formulated multiobjective optimization problem (MOP), yielding the Pareto‐optimal front of constellation configurations. Simulation results demonstrate that the proposed algorithm achieves superior convergence performance and solution diversity.
To enable global connectivity through 6G, the efficient operation of hierarchical satellite networks that integrate geostationary (GEO) and low-earth orbit (LEO) satellites is paramount. A significant challenge in achieving this operational efficiency lies in the dynamic association between the extensive array of LEO s...
Kazuma Mashiko, Hiroaki Hashida, Y. Kawamoto et al.· IEEE Transactions on Cogniti...· 0 citations
The space-air-ground-sea integrated networks (SAGSIN) are anticipated to provide seamless and ubiquitous connectivity in remote areas with deficient infrastructure. Nevertheless, the downlink communication to remote unmanned aerial vehicle (UAV) swarms remains challenged due to ultralong-distance propagation, high mobi...
Yu-Ze Tong, Shao-Hua Wu, Qun Wang et al.· 2026 IEEE/CIC International...· 0 citations
In rapidly expanding low Earth orbit (LEO) satellite networks, the transmission capacity of satellite-to-ground downlinks has become a critical bottleneck for massive data backhaul. In practical systems, the severe supply-demand imbalance between limited gateway antennas and numerous passing satellites makes it impossi...
Numerical results indicate that the proposed framework outperforms benchmark schemes while accounting for traffic demands and EE, resulting in a mixed-integer nonlinear program (MINLP) for which finding a globally optimal solution is generally intractable.
Wooseok Cha, Kyeongsoo Kim, Seonghoon Kim et al.· IEEE Transactions on Wireles...· 0 citations
Efficient fuel supply for special railway rolling stock requires a routing framework that combines realistic network data, fast initial construction, and practical improvement procedures. This paper presents a hybrid approach for railway fuel tanker routing in which GIS-based road distances are used to formulate a capa...
A. A. Olenberg, V. Kochergin· Geotechnology, Mining and Ra...· 0 citations
A rolling-horizon migration-aware dynamic greedy control node placement algorithm (RH-MA-DGCNP) is proposed, which updates the CN placement and the affiliation between access-layer satellites and CNs at each reconfiguration epoch while jointly considering the handover delay and the migration delay caused by transferrin...
Yang Liu, Wen Liu, Wen-Liang Lin et al.· Electronics· 0 citations
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