Future mobile networks will enable new use cases, requiring further enhanced data rates, latency, coverage, capacity, and reliability. In this article, to emphasize sustainable energy consumption and improved device battery lifetime, the concept, benefits, and challenges of utilizing wake-up radio-based access in 5G networks are reviewed and discussed. To this end, the operating principle and associated wake-up signal structures are first reviewed, together with the corresponding power consumption and buffering delay trade-offs. Then the applicability of wake-up methods at mmWave bands and beamforming systems is addressed and highlighted. Additionally, an energy-efficient mobility management procedure for wake-up radio-based devices is described and demonstrated, utilizing narrowband uplink reference signals. Overall, the article provides an overview of wake-up-based access in 5G systems as a promising power-saving mechanism, and discusses the associated prospects, benefits, and challenges.

中文翻译：

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基于唤醒无线电的 5G 移动接入：方法、优势和挑战

未来的移动网络将支持新的用例，需要进一步提高数据速率、延迟、覆盖范围、容量和可靠性。在本文中，为了强调可持续能源消耗和延长设备电池寿命，回顾和讨论了在 5G 网络中利用基于唤醒无线电的接入的概念、优势和挑战。为此，首先回顾工作原理和相关的唤醒信号结构，以及相应的功耗和缓冲延迟权衡。然后解决并强调了唤醒方法在毫米波频段和波束成形系统中的适用性。此外，使用窄带上行链路参考信号，描述和演示了用于唤醒基于无线电的设备的节能移动管理程序。全面的，