G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 1/02 (2006.01) G08B 21/22 (2006.01) H04B 7/26 (2006.01)
Patent
CA 2132062
SYSTEM AND METHOD FOR REMOTE MONITORING ABSTRACT OF THE DISCLOSURE A communication and processing system (10) for monitoring signals transmitted from personal transmitter units (PTUs 20) to determine whether alarm or emergency conditions have occurred and whether scheduled communications from PTUs (20) are missing. The PTUs (20) detect various alarm and emergency conditions and transmit data communications to a field node (18). The field node (18) receives data communications from all PTUs (20) within range. If a data communication indicates an emergency condition, a field report message is immediately sent to a control facility (12). If a communication indicates an alarm condition, an audible alarm is sounded at the field node but no message is sent to the control facility yet. If the alarm condition is not corrected within a predetermined period of time, a message describing the alarm condition is sent to the control facility (12). When scheduled communications from a PTU (20) are not received at the field node (18), the situation is treated as an alarm condition.
Gowling Lafleur Henderson Llp
Motorola Inc.
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