# Optical Wireless Fronthaul-Enhanced High-Throughput FC-AE-1553 Space Networks
## 6 Conclusions and Future Work  
This paper introduces a novel hybrid space network architecture by integrating optical wireless communication links into the deterministic FC-AE-1553 space network. Simulation results demonstrate that the bandwidth of the HSN expands over 20 times compared to the existing FC-AE-1553 system, with an average latency reduction of 87.3%.  
Moreover, this paper enhances the quality of service for space tasks through a multi-priority scheduling strategy and a comprehensive evaluation channel selection strategy based on the new hybrid architecture. Simulation results confirm that high-priority traffic receives a higher proportion of service, and the channel selection adapts to the needs of the various traffic and real-time network conditions.  
In the future, we hope to prioritize addressing the potential challenges that the hybrid network may face in real-world application scenarios and improve the operational methods of our HSN system to better adapt to practical demands. These challenges include ensuring reliability in the presence of link failures or obstructions caused by mobility, as well as optimizing complex network scheduling strategies. Currently, the network topologies of hybrid networks involving FC and Li-Fi are relatively independent. However, future research should explore scenarios that involve hybrid routing, where both FC and Li-Fi can be integrated into a unified routing framework.  
This paper has completed a simulation of the HSN system. However, in terms of practical implementation, modifications to the integrated network protocols, the expansion of the hardware modules, and software upgrades and maintenance are still required in the future. While Li-Fi technology meets the requirements for miniaturization, lightweight design, and energy efficiency in space equipment, there will be extensive engineering tests in the future to ensure a smooth transition from ground validation to in-orbit implementation. We are confident that the implementation of the HSN in space stations in the future could substantially support scientific scenarios requiring both high data throughput and minimal communication latency, such as extravehicular earth observation and space astronomy.  
Figure 16: Latency performance with wireless links.  
**Author Contributions:** System model and simulation, X.C.; FC backbone system design, J.H. and G.L.; FC access system design, Y.M.; results discussion, X.L. and L.L.; writing--original draft preparation, X.C.; writing--review and editing, X.L., J.H., Y.M., G.L., and L.L.; funding acquisition, J.H. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This work was supported in part by the Key Research Program of the Chinese Academy of Sciences under Grant ZDRW-KT-2019-1-0103.  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** Data are available upon reasonable request to the corresponding author.  
**Conflicts of Interest:** The authors declare no conflicts of interest.