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arXiv 1610.04793cs.NI
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低功耗广域网分析:LoRa能否扩展?

Low Power Wide Area Network Analysis: Can LoRa Scale?

Orestis Georgiou, Usman Raza

摘要:

低功耗广域网(LPWA)从设计、标准化到商业化都取得了惊人的进展。在这个快速采用的时代,随着连接到物联网(IoT)的设备数量不可避免地增加,分析这些技术的扩展程度至关重要。在这封信中,我们提供了一个随机几何框架,用于建模单网关LoRa网络的性能,这是一种领先的LPWA技术。我们的分析阐述了LoRa的独特之处,包括其啁啾扩频调制技术,对无线电占空比的监管限制,以及在顶部使用ALOHA协议,所有这些在当今的商业蜂窝网络中都不常见。我们表明,由于使用相同的扩频序列的干扰信号的终端设备的数量的增长,覆盖概率呈指数下降。我们的结论是,这个基本的限制因素可能比频谱限制对LoRa可扩展性更重要。我们对LoRa网络中发现的共同扩频因子干扰的推导使得能够对此类网络进行严格的可扩展性分析。

英文摘要:

Low Power Wide Area (LPWA) networks are making spectacular progress from design, standardisation, to commercialisation. At this time of fast-paced adoption, it is of utmost importance to analyse how well these technologies will scale as the number of devices connected to the Internet of Things (IoT) inevitably grows. In this letter, we provide a stochastic geometry framework for modelling the performance of a single gateway LoRa network, a leading LPWA technology. Our analysis formulates unique peculiarities of LoRa, including its chirp spread-spectrum modulation technique, regulatory limitations on radio duty cycle, and use of ALOHA protocol on top, all of which are not as common in today's commercial cellular networks. We show that the coverage probability drops exponentially as the number of end-devices grows due to interfering signals using the same spreading sequence. We conclude that this fundamental limiting factor is perhaps more significant towards LoRa scalability than for instance spectrum restrictions. Our derivations for co-spreading factor interference found in LoRa networks enables rigorous scalability analysis of such networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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