This work investigates run-time parameter control for Bluetooth Low Energy (BLE), based on the latest Bluetooth specification 5 released in 2016. Compared to the previous version, Bluetooth specification 5 provides more options for data rate and transmission power and gives room for adaptive parameter control to improve BLE performance in time-varying wireless environments. To the best of our knowledge, this work is the first systematic study of this regime in the research community. We experimentally study how more parameter options in Bluetooth specification 5 impact BLE performance. Based on the preliminary study, we design $AdaptaBLE$ that dynamically adjusts connection interval, data rate, and transmission power together to satisfy quality of service (QoS) requirements without wasting energy. Through extensive performance evaluation on off-the-shelf BLE chips, we show that $AdaptaBLE$ provides stable performance regardless of wireless environments and reduces QoS failures by 5 times with similar energy consumption compared to the state-of-the-art parameter control scheme for BLE.

这项工作基于2016年发布的最新蓝牙规范5，研究了蓝牙低功耗（BLE）的运行时参数控制。与以前的版本相比，蓝牙规范5提供了更多的数据速率和传输功率选项，并为自适应参数控制以改善时变无线环境中的BLE性能。据我们所知，这项工作是研究界对该制度的首次系统研究。我们通过实验研究了蓝牙规范5中更多的参数选项如何影响BLE性能。在初步研究的基础上，我们设计$\mathrm{一种}d\mathrm{一种}pŤ\mathrm{一种}乙\mathrm{大号}Ë$可以动态调整连接间隔，数据速率和传输功率，从而满足服务质量（QoS）要求，而不会浪费能源。通过对现成的BLE芯片进行广泛的性能评估，我们发现$\mathrm{一种}d\mathrm{一种}pŤ\mathrm{一种}乙\mathrm{大号}Ë$ 与BLE的最新参数控制方案相比，无论无线环境如何，它都能提供稳定的性能，并以类似的能耗将QoS故障降低5倍。