eAFH：低功耗蓝牙自适应跳频技术的探索
eAFH: Informed Exploration for Adaptive Frequency Hopping in Bluetooth Low Energy
摘要：
2020年生产的设备超过40亿台，蓝牙和蓝牙低功耗（BLE）已成为物联网的支柱。蓝牙和BLE通过自适应跳频（AFH）减轻拥挤的2.4 GHz频段中的干扰，在整个频谱上扩展通信，并进一步允许排除受干扰的信道。然而，在动态环境或用户移动性下，排除是具有挑战性的：当用户四处移动时，干扰影响新信道，迫使AFH剥夺自己的新频率，而一些其他被排除的信道现在没有损失，但仍然被排除在外。信道重新包含是AFH的一个基本但经常被忽略的方面，因为评估排除频率的新情况并非微不足道。我们提出了eAFH，通道排斥和包容的机制。eAFH将知情探索引入AFH：仅使用过去的测量，eAFH评估哪些频率我们最有可能从重新包括在跳频序列中受益。因此，eAFH适应干扰随时间变化的动态场景。我们表明，eAFH实现98-99.5%的链路层的可靠性，在动态Wifi干扰的存在下，1%的控制开销和40%的信道分集比最先进的方法。
英文摘要：
With more than 4 billion devices produced in 2020, Bluetooth and Bluetooth Low Energy (BLE) have become the backbone of the Internet of Things. Bluetooth and BLE mitigate interference in the crowded 2.4 GHz band via Adaptive Frequency Hopping (AFH), spreading communication over the entire spectrum, and further allows the exclusion of interfered channels. However, exclusion is challenging in dynamic environments or with user mobility: as a user moves around, interference affects new channels, forcing AFH to deprive itself of new frequencies, while some other excluded channels are now free of losses but remain excluded. Channel re-inclusion is a primordial, yet often left out, aspect of AFH, as it is non-trivial to assess the new situation of excluded frequencies. We present eAFH, a mechanism for channel exclusion and inclusion. eAFH introduces informed exploration to AFH: using only past measurements, eAFH assesses which frequencies we are most likely to benefit from re-including in the hopping sequence. As a result, eAFH adapts in dynamic scenarios where interference varies over time. We show that eAFH achieves 98-99.5% link-layer reliability in the presence of dynamic Wifi interference with 1% control overhead and 40% higher channel diversity than state-of-the-art approaches.
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。
