System Description

TD 93025US
9 May 2019 / Ver. I 53
System Description
teleCARE IP
9.2.1 Location Based teleCARE IP Wireless Using LF Beacons
The addition of the NILF low frequency beacons gives location based wireless functionality
available including wander management. The NILF will send out its ID, including location
information, at regular intervals using a low frequency 125 kHz signal that will be picked up
by the wireless transceiver modules that pass by the NILF.
Figure 45. Location based wireless functionality
The range of an LF beacon is adjustable and can be up to approximately 8.86 feet (2.7
meters).
When a wireless device comes within range of a passive NILF location beacon it will receive
the beacon ID with the location information. It then stores the location as the last known
location. The stored last known location will be added to the next event that is transmitted
from the wireless device, like a button press, battery low alarm etcetera.
When a wireless device comes within range of an active NILF location beacon, it sends a
location update message to the wireless server. In addition, based on the received location
information, the wireless server can check to see if the person carrying the wireless device
is allowed to access that location. Doors can be opened or stay closed depending on the
access rights. Automatic alarms can be generated when a person leaves or enters a certain
location.
Whenever a call is made from a wireless module the location will be transmitted to the
wireless server. When the wireless module is not in range of an LF beacon the last two
known locations will be transmitted.