Patent ID: 7015789
Filing Date: 2006-03-21
Classification: G08B

Abstract:
1. A method for communicating between a remote unit and a master unit in a radio-frequency building monitoring system, wherein the remote unit is capable of transmitting to and receiving messages from the master unit of the building monitoring system, the remote unit further having a non-communicating low power consumption state in which said remote unit can neither receive nor transmit, a receiving state in which said remote unit can receive, and a transmitting state in which said remote unit can transmit, said remote unit also having at least one sensor producing a sensor change event, the method comprising: waiting for sensor change event while in said non-communicating state; entering the transmitting state and transmitting a message upon detecting the sensor change event; entering the receiving state and waiting for acknowledgement of said data transmission; and returning to the waiting for sensor change step; changing to a disarmed state upon reception of a disarm message from said master unit, wherein, while in said disarmed state, said remote unit does not, in combination, both sense sensor data from the sensor and transmit sensor data; and changing to and armed state upon reception of an arm message from said master unit, wherein, while in said armed state, said remote unit does, in combination, sense sensor data from the sensor and transmit sensor data.