太赫兹科学与电子信息学报, 2019, 17 (1): 152, 网络出版: 2019-04-07  

基于USRP的NB-IoT/FSK异构物联网系统实现

Implementation of NB-IoT/FSK heterogeneous IoT system based on USRP
作者单位
中山大学 电子与信息工程学院,广东 广州 511400
摘要
窄带物联网(NB-IoT)技术因具备广域覆盖、低功耗、海量用户接入的优点,成为当前广域物联网的主流技术,但单一的NB-IoT组网模式在某些极端功率受限环境(如水表井、地下车库等深度覆盖区域)仍会出现覆盖不足以及终端耗电大的问题。针对传统应用场景下的NB-IoT单独组网方式的不足,提出一种NB-IoT/FSK混合异构组网广域物联网架构,该架构能够借助频移键控(FSK)调制的较低解调门限进一步提高混合网络的覆盖范围,降低最末端终端节点功耗,从而实现深度覆盖下更多终端用户接入能力。使用通用软件无线电外设(USRP)平台搭建了该异构网演示系统,模拟了物联网智能水表的应用场景,仿真与实际的简单外场测试验证证明了该异构组网架构的可行性与优良性能。
Abstract
With the advantages of wide coverage, low power consumption, massive user access, Narrow Band Internet of Things(NB-IoT) has become one of the mainstream technologies of wide area IoT. Nevertheless, a single NB-IoT network in the environment with power extremely constrained(such as wells, underground garage in demand of deep coverage) will still have problems of weak coverage and large power consumption of end nodes. Due to the shortage of NB-IoT single network in traditional application scenarios, a hybrid NB-IoT/FSK heterogeneous network architecture is proposed. With lower demodulation threshold of Frequency-Shift Keying(FSK), it can further improve the coverage of the hybrid network, reduce the end node power consumption, so as to realize more terminals’ access under the requirement of deep coverage. And then Universal Software Radio Peripheral(USRP), the software defined radio platform, is adopted to build the heterogeneous network demo system and simulate the scenario of intelligent water meter reading. By simple simulations and actual field test, this heterogeneous network is proved to be feasible and have good performance.

曾冠铭, 梁智彪, 陈翔. 基于USRP的NB-IoT/FSK异构物联网系统实现[J]. 太赫兹科学与电子信息学报, 2019, 17(1): 152. ZENG Guanming, LIANG Zhibiao, CHEN Xiang. Implementation of NB-IoT/FSK heterogeneous IoT system based on USRP[J]. Journal of terahertz science and electronic information technology, 2019, 17(1): 152.

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