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Das ist auch schon alles, was sie können und tun. Das Signal enthält eine eindeutige Kennung aus drei Teilen, der Proximity UUID, einem Major- und einem Minor-Code. Die App auf dem Smartphone erkennt dann in Rücksprache mit ihrem Backend-System/Server, ob das Signal von einem iBeacon stammt, das ihrem Anbieter gehört – üblicherweise anhand der Proximity UUID - und wenn ja, an welchem Standort (Major-Code) und für welches Objekt oder Produkt (Minor-Code) das iBeacon steht.
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Just like beacons or a lighthouse, iBeacons send out signals at regular intervals. And that is all they do and all they can do. The signal contains a unique identification composed of three parts: the proximity UUID, a major and a minor code. The app on the smartphone recognizes in consultation with its backend system/server, whether the signal origins from an iBeacon that belongs to the app's vendor – usually based on the proximity UUID – and, if yes, at what location it is (major code) and which object or product (minor code) the iBeacon represents. In addition, the strength of the signal allows the app to detect how far the iBeacon is from the smartphone. This works up to a distance of approx. 70 m (signal range) and at close range to a precision of approx. 5 cm. If the app picks up signals from at least three iBeacons simultaneously, it can calculate the position of the smartphone by triangulation. For the smartphone to pick up iBeacon signals in the first place, the user needs to allow it to use location-based services and have the matching iBeacon app installed.
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