Al Kalaa Mohamad Omar, Guag Joshua, Seidman Seth J
Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD 20993.
IEEE Electromagn Compat Mag. 2018 Third Quarter;7(3):60-64. doi: 10.1109/memc.2018.8479340.
The use of shared and unlicensed radio spectrum has been the impetus of innovative and widely used technologies (e.g., Wi-Fi, Bluetooth, and others)-driving the scene of ubiquitous connectivity for devices, sensors, and peripherals in an encompassing Internet of Things (IoT). However, coexisting technologies operating in unlicensed bands need to share limited spectrum resources while attempting to offer desired performance. This could prove challenging as channel access is not guaranteed, which raises concerns for wireless coexistence in sensitive applications like medical devices. In this article, we provide a brief review of topics forming the current stage of wireless coexistence in research, industry, and regulatory circles. We present the standardization activities for the evaluation of wireless coexistence, and recent advancements of unlicensed spectrum technologies such as Wi-Fi, Bluetooth, and Long Term Evolution (LTE) in unlicensed bands, along with proposed evaluation methods.
共享和免授权无线电频谱的使用推动了创新且广泛应用的技术（如Wi-Fi、蓝牙等）的发展，为物联网（IoT）中设备、传感器和外围设备的普遍连接场景提供了动力。然而，在免授权频段运行的共存技术在试图提供所需性能的同时，需要共享有限的频谱资源。由于信道接入无法得到保证，这可能具有挑战性，这引发了对医疗设备等敏感应用中无线共存的担忧。在本文中，我们简要回顾了在研究、行业和监管领域构成当前无线共存阶段的主题。我们介绍了用于评估无线共存的标准化活动，以及免授权频段中Wi-Fi、蓝牙和长期演进（LTE）等免授权频谱技术的最新进展，以及提出的评估方法。
