Commit 0e305da1 authored by Archan MISRA's avatar Archan MISRA

shortened abstract

parent 9e74d46d
...@@ -74,21 +74,31 @@ ...@@ -74,21 +74,31 @@
\begin{abstract} \begin{abstract}
Being able to operate commodity wearable / IoT devices using just power Energy harvesting, from a diverse set of modes such as light, temperature or motion,
harvested from the environment has been an active area of research for many has been viewed as the key to developing batteryless sensing devices. In this paper, we develop
years. Many solutions using various modalities such as light, kinetic the nascent idea of harvesting RF energy from WiFi transmissions, applying it to power a
energy, and temperature gradients have been proposed. In this paper, we prototype wearable device that captures and transmits accelerometer sensor data.
propose an orthogonal approach that uses beamformed WiFi transmissions to Our solution, \names, has two key innovations: 1) beamforming WiFi transmissions
power a complete wearable device that has a CPU, an accelerometer sensor, to significantly boost the energy that a receiver can harvest $\sim$3-4 meters away,
and a WiFi interface. Our solution, called \names, makes two main and 2) smart zero-energy, triggering of inertial sensing, that allows intelligent duty-cycled operation of devices whose transient power
contributions; 1) beamforming to significantly boost the energy that can be consumption far exceeds what can
harvested at a receiver located $\sim$3-4 meters away, and 2) smart event
triggering to allow the operation of devices that need more power than can
be instantaneously harvested. We provide extensive experimental validation, be instantaneously harvested. We provide extensive experimental validation,
using both careful measurement studies as well as a user study with human using both careful measurement studies as well as a controlled study with human
participants, to show that \name can be used to power a high power wearable participants, to show that \name can be used to power our wearable device, at least in office environments.
device (consuming at least 40mW of power) that is reporting sensor data
periodically over a WiFi interface. % high power wearable
% device (consuming at least 40mW of power) that is reporting sensor data
% periodically over a WiFi interface.
% Being able to operate commodity wearable / IoT devices using just power
% harvested from the environment has been an active area of research for many
% years. Many solutions using various modalities such as light, kinetic
% energy, and temperature gradients have been proposed. In this paper, we
% propose an orthogonal approach that uses beamformed WiFi transmissions to
% power a complete wearable device that has a CPU, an accelerometer sensor,
% and a WiFi interface.
\end{abstract} \end{abstract}
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