Assemblies, devices, and systems for polling NFC tags
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United States of America Patent
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Jan 2, 2018
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app pub date -
Mar 13, 2014
filing date -
Mar 15, 2013
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Abstract
Some battery-powered devices, such as smartphones, can be unlocked with use of wearable NFC (Near Field Communication) authentication devices. However, using conventional NFC authentication procedures is expensive in terms of power consumption because of continual rediscovery and reauthentication of the wearable authentication device. To address this, the present inventors, devised, among other things, more efficient methods for authenticating NFC-tagged authentication device, such as rings. For example, one embodiment uses two NFC polling loops or structures, instead of one as conventionally done. The first loop, used for initial authentication, entails scanning for two or more types of NFC tags. And the second loop, invoked after initial authentication, scans for a smaller subset of the two or more types to conserve battery power.
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