卫星星座网络容量密度评估

孟贤; 秦大力; 汪宇; 孔垂丽; 罗禾佳; 王俊

doi:10.11959/j.issn.2096-8930.2023032

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卫星星座网络容量密度评估

专题：面向6G的星地融合移动通信 | 更新时间：2024-06-03

- 卫星星座网络容量密度评估
- Capacity Density Assessment of Satellite Constellation Network
- 天地一体化信息网络 2023年4卷第3期页码：67-78
- 作者机构：
- 作者简介：
  
  [ "孟贤（1979- ），华为技术有限公司高级工程师，主要研究方向为星地一体化网络仿真、低轨星座组网等" ]
  [ "秦大力（1984- ），华为技术有限公司高级工程师，主要研究方向为卫星星座仿真平台、星地融合仿真平台等" ]
  [ "汪宇（1990- ），华为技术有限公司高级工程师，主要研究方向为空间信息网络、卫星通信移动性管理、低轨星座组网等" ]
  [ "孔垂丽（1990- ），华为技术有限公司高级工程师，主要研究方向为卫星波束管理、低轨卫星接入等" ]
  [ "罗禾佳（1986- ），华为技术有限公司主任工程师，主要研究方向为卫星通信、信道编码、信号处理、多天线技术等" ]
  [ "王俊（1976- ）华为技术有限公司高级技术专家，主要研究方向为卫星通信、信道编码、无线通信、系统设计、人工智能等" ]
- 基金信息：
- DOI：10.11959/j.issn.2096-8930.2023032
  中图分类号： TP393
- 网络出版日期：2023-09，
  
  纸质出版日期：2023-09-20
- 稿件说明：
移动端阅览
孟贤, 秦大力, 汪宇, 等. 卫星星座网络容量密度评估[J]. 天地一体化信息网络, 2023,4(3):67-78.

Xian MENG, Dali QIN, Yu WANG, et al. Capacity Density Assessment of Satellite Constellation Network[J]. Space-integrated-ground information networks, 2023, 4(3): 67-78.
孟贤, 秦大力, 汪宇, 等. 卫星星座网络容量密度评估[J]. 天地一体化信息网络, 2023,4(3):67-78. DOI： 10.11959/j.issn.2096-8930.2023032.

Xian MENG, Dali QIN, Yu WANG, et al. Capacity Density Assessment of Satellite Constellation Network[J]. Space-integrated-ground information networks, 2023, 4(3): 67-78. DOI： 10.11959/j.issn.2096-8930.2023032.

摘要

采用传统分析方法在较低波束密度场景下会极大低估系统的吞吐能力，且无法揭示出高波束密度场景下出现的容量饱和现象。为了克服上述问题，提出一种全新的系统仿真方法，以对卫星网络及星地一体化网络的容量密度指标进行精确评估。基于此方法，首先，评估地球不同经纬度区域的容量密度，可以观察到，随着卫星运动，相同地区的容量密度变化较大，其最大最小容量密度的比值可达两倍；其次，可见性越高的地区通常具有更高的容量密度，高频场景下，气衰对容量密度的影响不可忽略；最后，针对星地融合系统，评估结果显示蜂窝覆盖和卫星覆盖的容量密度可以相差4个数量级。为了提升星座容量密度，尝试用提升最大点亮波束数和提升卫星规模两种技术路径。结果显示，在星座总波束相同的情况下，提升卫星规模时性能更优；但两种提升星座总波束数的方式都存在容量上界，且边际效应显著下降。为此，最后提出提高卫星天线增益的方案，仿真结果表明所提方案可以显著提升星座容量密度。

Abstract

The traditional analytical method greatly underestimates the throughput capability of the system in low beam density scenario

and cannot reveal the capacity saturation phenomenon in high beam density scenario.To overcome the preceding problems

a new system simulation method was proposed to accurately evaluated the capacity density indicator of satellite constellation network and integrated satellite and terrestrial network

Based on this method

first

the capacity density of different longitude and latitude regions of the earth was evaluated.It could be observed that the capacity density of the same region varies greatly with the movement of the satellite

and the maximum capacity density was twice the minimum.Then

areas with higher visibility usually had higher capacity density.In high-frequency scenarios

the impact of atmospheric attenuation on capacity density could not be ignored.Finally

for the integrated satellite and terrestrial network

the evaluation results showed that the capacity density of cellular coverage and satellite coverage could differ by four orders of magnitude.In order to improved the capacity density of satellite constellation network

two technical paths were attempted: increasing the maximum number of illuminated beams and increasing the satellite scale.The results showed that the performance was better when the constellation scale was increased when the total beams of the constellation were the same.However

the two ways to increase the total number of beams in a constellation had an upper bound on capacity

and the marginal effect decreased significantly.Finally

a scheme to increase the gain of satellite antenna was proposed.The simulation results showed that the proposed scheme could significantly increase the capacity density of constellation.

关键词

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references

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星地融合网络的组网关键技术探讨

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