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Physical Layer Analysis of LoRa Protocol by Means of a Coexistence Case Study

机译:通过共存案例研究LoRa协议的物理层分析

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Low-Power Wide Area Networks (LPWAN) represent a new communication paradigm which allows for small amounts of data to be transmitted over long distances in a very low power manner at the cost of a reduced data rate. These networks are becoming very popular in the context of the Internet of Things. This is mainly due to the wide range of new and existing applications they can serve in multiple industries, like logistics and precision agriculture. Among the most popular LPWAN networks in the market today, LoRaWAN has been largely adopted and shows great potential for growth in the upcoming years. In this paper, it is presented an implementation of a LoRaWAN radio link in order to evaluate its physical layer and its coexistence performance. The LoRa modulation/demodulation process is described based on packets captured using a software defined radio. The robustness of the protocol against wide band interferers is investigated through a coexistence experiment done in a confined environment. The results show that, even though it is simple and lightweight, the LoRaWAN network is extremely robust against interference. However, there is a clear trade-off between the effectiveness to suppress the interference and the data rate of the transmission, which also affect the size of the payload allowed per packet.
机译:低功耗广域网(LPWAN)代表了一种新的通信范例,它允许以非常低的功耗方式在远距离上传输少量数据,但以降低的数据速率为代价。这些网络在物联网的背景下变得非常流行。这主要是由于它们可以为物流和精准农业等多个行业提供服务的各种新的和现有的应用程序。在当今市场上最受欢迎的LPWAN网络中,LoRaWAN已被广泛采用,并在未来几年内显示出巨大的增长潜力。在本文中,提出了一种LoRaWAN无线电链路的实现,以评估其物理层及其共存性能。基于使用软件定义的无线电捕获的分组来描述LoRa调制/解调过程。通过在密闭环境中进行的共存实验,研究了该协议对宽带干扰的鲁棒性。结果表明,即使LoRaWAN网络简单,轻巧,它也具有极强的抗干扰能力。但是,在抑制干扰的有效性和传输的数据速率之间存在明显的权衡,这也影响每个数据包所允许的有效载荷的大小。

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