HARC: A Heterogeneous Array of Redundant Persistent Clocks for Batteryless, Intermittently-Powered Systems
| Autor: | Henry Duwe, Mathew L. Wymore, Daji Qiao, Vishak Narayanan, Vishal Deep |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.industry
Computer science 020208 electrical & electronic engineering 02 engineering and technology 020202 computer hardware & architecture Ambient energy Power (physics) law.invention Capacitor law Range (aeronautics) 0202 electrical engineering electronic engineering information engineering Radio frequency business Computer hardware |
| Zdroj: | RTSS |
| DOI: | 10.1109/rtss49844.2020.00033 |
| Popis: | Batteryless sensing devices powered solely by ambient energy sources are expected to operate in an intermittent manner, since they do not have a predictable, or even continuous, energy supply. When such an intermittent system is powered off, it cannot keep track of time using conventional means. However, a continuous sense of time is critical for any system running real-time or time-sensitive applications. In this paper, we present HARC (Heterogeneous Array of Redundant Persistent Clocks), a novel solution to the problem of timekeeping for batteryless, intermittently-powered systems. HARC uses a heterogeneous, redundant array of capacitor-based persistent clocks that each decay in parallel, but at different rates, to provide variation-resilient high accuracy over a wide range of power off-times. We demonstrate the feasibility and effectiveness of HARC using experimental evaluations on a HARC prototype, and trace-based simulations of HARC-supported communication directly between two devices intermittently-powered by RF harvesting. |
| Databáze: | OpenAIRE |
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