Scholarlink

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.

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Direct to Cell VLEO SatCom System Provide Low E2E Latency in STIN

  • 会议论文

  • 发表日期：

    2025年

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  • Yuyan Ren,
  • Meilin Xu,
  • Yongkui Ma,
  • Chengzhao Shan,
  • Yunkai Guo,
  • Fan Zhang

摘要

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.