面向6G物联网的主被动互惠传输关键技术

doi:10.11959/j.issn.2096-3750.2020.00152

Abstract

Abstract:

mMTC (massive machine-type communication) is one of the three major application scenarios of 5G network,but it is highly likely that the truly mature Internet of everything may not be realized until the future 6G network.In order to realize the deep immersive ubiquitous connection network,6G IoT will simultaneously provide all-round services such as high data rate,low latency,high reliability and massive connections.Firstly,the 6G was prospected and the technical challenges of 6G IoT were summarized.Then the existing physical layer transmission technologies of IoT were reviewed.Next,the promising symbiotic transmission technologies for 6G IoT were introduced and discussed,which enable the possibility that active transmission and passive transmission facilitates each other and provide a new solution for 6G IoT transmission.Finally,some possible future research directions were presented for symbiotic transmission in 6G IoT.

Key words: 6G, Internet of things, ambient backscatter technology, intelligent reflecting surface communication

CLC Number:

TN919

Mingjiang WU,Xianfu LEI,Li LI,Xiaohu TANG. Key technologies of symbiotic transmission for 6G Internet of things[J]. Chinese Journal on Internet of Things, 2020, 4(1): 45-51.

Figures/Tables 7

References 30

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传输技术类型	技术代表	特征
主动式传输技术	Sigfox、LoRa、NB-IoT、蓝牙、ZigBee	有源发射机、高组件成本、高功耗、高速率、传输距离远
被动式反向散射传输技术	RFID	无源发射机、低组件成本、低功耗、低速率、传输距离短

主动式物联网技术	传输技术
Sigfox	100 Hz超窄带宽（UNB），BPSK^[5]
LoRa	基于线性调频的窄带扩频技术^[6]
NB-IoT	正交频分多址（OFDMA）/单载波频分多址（SC-FDMA），BPSK/QPSK^[7]
蓝牙	跳频扩频（FHSS），GFSK^[8]
ZigBee	直接序列扩频（DSSS），BPSK/QPSK^[9]

Key technologies of symbiotic transmission for 6G Internet of things

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