Conclusion

Frequent handover resulting from the fast traveling speed of LEO satellites is a significant challenge in mobile satellite networks. In this paper, we addedhave proposed a novel handover design to reduce handover latency. Basing on predicting user access satellites using ephemeris, the propoesd handover scheme has avoided avoid communication with core network. Furthermore, we constructed a mobile satellite network prototype using Open5GS and UERANSIM and conducted experiments to evaluate the performance of the proposed handover scheme. The results show that our approach has achieved a remarkable 10× reduction in latency compared to the 3GPP NTN standard handover scheme and two other existing approaches.

由低地球轨道（LEO）卫星的高速移动所导致的频繁切换，是卫星移动网络中的一个重大挑战。在本文中，我们提出了一种新颖的切换设计以降低切换延迟。基于利用星历（ephemeris）来预测用户的接入卫星，我们提出的切换方案避免了与核心网的通信。此外，我们使用Open5GS和UERANSIM构建了一个卫星移动网络原型系统，并进行了实验来评估所提切换方案的性能。结果表明，与3GPP NTN标准切换方案及另外两种现有方法相比，我们的方案在延迟方面取得了超过10倍的显著降低。