Research Article
Direct to Cell VLEO SatCom System Provide Low E2E Latency in STIN
@INPROCEEDINGS{10.1007/978-3-031-86196-3_4, author={Yuyan Ren and Meilin Xu and Yongkui Ma and Chengzhao Shan and Yunkai Guo and Fan Zhang}, title={Direct to Cell VLEO SatCom System Provide Low E2E Latency in STIN}, proceedings={Wireless and Satellite Systems. 14th EAI International Conference, WiSATS 2024, Harbin, China, August 23--25, 2024, Proceedings, Part I}, proceedings_a={WISATS}, year={2025}, month={3}, keywords={VLEO STIN Doppler shift E2E latency ISLs}, doi={10.1007/978-3-031-86196-3_4} }- Yuyan Ren
Meilin Xu
Yongkui Ma
Chengzhao Shan
Yunkai Guo
Fan Zhang
Year: 2025
Direct to Cell VLEO SatCom System Provide Low E2E Latency in STIN
WISATS
Springer
DOI: 10.1007/978-3-031-86196-3_4
Abstract
Large scale low earth orbit (LEO) satellite constellations provide global Internet services for mobile terminals. In this paper, we first give an architectural model of the Direct to Cell satellite communications(SatCom) system. Then we analyze the terrestrial coverage and Doppler shift of the very low earth orbit (VLEO) satellites based on the abstracted geometric architecture. In particular, we simplify the Doppler shift closure expression compared to the conventional expression. We compare the end to end (E2E) latency of Satellite Terrestrial integrated network (STIN) and traditional terrestrial networks (TN). According to the different scenarios, we propose suitable location known and altitude known E2E transmission schemes. The proposed E2E transmission strategy based on maximum inter satellite links (ISLs) requires the least number of satellites and provides lower E2E transmission latency, with a 28% improvement over traditional terrestrial E2E transmission, which fully illustrate the E2E latency advantage of STIN. Finally, we obtain the areas of lower E2E latency for D2C VLEO SatCom transmissions.
