低轨卫星物联网的发展背景、业务特点和技术挑战

doi:10.11959/j.issn.1000-0801.2019089

Abstract

Abstract:

The low earth orbit (LEO) internet of things (IoT) is an effective solution to solve the coverage inefficiency problem of terrestrial IoT in ocean,mountain and desert areas.On the basis of analyzing the developing background and situation of LEO IoT,the main application and service characteristics were given,finally the technical challenges and key technologies need to be solved for LEO IoT were discussed.

Key words: LEO IoT, developing background, service characteristic, technical challenge, key technology

CLC Number:

TN927

Jun SHEN,Weibin GAO,Gengxin ZHANG. Developing background,service characteristics and challenges of LEO IoT[J]. Telecommunications Science, 2019, 35(5): 113-119.

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项目	地面物联网	低轨卫星物联网
覆盖范围/基站	数千米级	数千千米
服务终端/基站	<5万	海量，>100万
传输体制	NB-IoT、LoRa	星地融合、5G
技术方案	成熟	国外有成熟案例，国内正从技术验证走向工程实践
系统稳定性	受天气、地理条件制约，自然灾害影响比较大	几乎不受天气、地理条件影响，可全天时全天候工作
应用场景	共享单车、智能家居、智慧城市	物流监控、环境保护、水文监测、“一带一路”等

参数指标		参数值
激活频率	事件触发	静止参数特性	位置或移动特性	视频应用特性
单次数据量		10~50 byte	10~50 byte	流
平均带宽需求		600 bit/s	600 bit/s	128 kbit/s
移动速度/（km·h^-1）		无	0~20	无
位置精度		无	米级	无
QoS		中	高	高
通信连续性		否	否	是
忙时时段/h		0~24	0~24	0~24

Developing background,service characteristics and challenges of LEO IoT

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