The Internet of Things helps to have every individual interconnected with their surroundings and to interact with them through smart devices. In recent years, Bluetooth Low Energy (BLE) technology has become very popular in smart infrastructures, the medical field, the retail industry, and many more areas due to its availability in a plethora of wireless devices. BLE is widely used in IoT devices, such as smartphones, smart watches, and BLE beacons. Beacons are small, low-cost, and low-power wireless transmitters that bring attention to their location by broadcasting a signal with a unique identifier at regular intervals. BLE beacons are a promising solution for many smart city applications, from proximity marketing to indoor navigation. However, they do pose security and privacy challenges. This work discusses the characteristics of BLE beacons, the applications that can benefit from them, and the challenges they pose while trying to identify research opportunities and future directions.

中文翻译：

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智慧城市中的BLE信标：应用，挑战和研究机会

物联网有助于使每个人与周围环境相互连接，并通过智能设备与他们互动。近年来，由于蓝牙低功耗（BLE）技术在众多无线设备中的可用性，已在智能基础架构，医疗领域，零售行业以及许多其他领域变得非常流行。BLE广泛用于IoT设备，例如智能手机，智能手表和BLE信标。信标是一种小型，低成本，低功耗的无线发射器，它们通过定期广播带有唯一标识符的信号来引起人们的注意。BLE信标是从邻近市场营销到室内导航的许多智能城市应用的有前途的解决方案。但是，它们确实带来了安全和隐私挑战。这项工作讨论了BLE信标的特性，