Patent ID: 8436727
Filing Date: 2013-05-07
Classification: G07C,G16H,Y10T

Abstract:
1. A method comprising: transmitting a first signal from a first source indicating when a person is detected within a predetermined distance from a door, the first signal being encoded with door location data that identifies the door; receiving the first signal at a second source, the second source being coupled to the person; transmitting a second signal from the second source to the first source and a third source, the second signal being encoded with the door location data and identification data of the person coupled to the second source; receiving the second signal at the first source and the third source and transmitting from the first source a third signal to the third source if the door is in an open position, wherein the third signal is encoded with the door location data of the door and identification data of the person coupled to the second source; determining whether the door location data encoded in third signal matches the door location data encoded in the first signal; and displaying the door location data and the identification data of the second signal if the door location data encoded in the third signal matches the door location data encoded in the second signal.