Communication Dans Un Congrès Année : 2026

AcouBLE: Clock-Seeding BLE chips via Acoustic Signals for Extended Energy Efficiency

Résumé

We present AcouBLE, the first system to significantly reduce the BLE tag's RF front-end energy consumption while preserving standard BLE operation, backward compatibility, and one-to-one deployability. At its core is clock-seeding, a new paradigm that offloads the generation of the high-frequency MHz clock from the energy-constrained tag to the central (smartphone). The smartphone transmits a low-frequency audio signal that the tag transforms into a clean, ultra-low-jitter reference clock-eliminating the most energy-expensive component of a BLE connection event.

Our design combines a novel digital-analog upconversion pipeline that converts a kHz audio tone into a stable 32 MHz clock with a lightweight feedback protocol to implement clock-seeding on commodity BLE chips without modifying the BLE stack or requiring privileged access on the central. A full prototype demonstrates up to 5.9X energy savings in Connected mode, while maintaining RF performance, seamless deployability, and backward compatibility.

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Dates et versions

hal-05507764 , version 1 (12-02-2026)

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  • HAL Id : hal-05507764 , version 1

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Mohammad Rostami, Gentian Jakllari. AcouBLE: Clock-Seeding BLE chips via Acoustic Signals for Extended Energy Efficiency. 24th International Conference on Pervasive Computing and Communications (PerCom 2026), Mar 2026, Pise, Italy. ⟨hal-05507764⟩
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