Importance

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Abstract

Communications sessions between two or more radio transceivers are synchronized automatically to conserve battery power. A duty cycle is established, and the duty cycle data are communicated from one transceiver to the other(s) along with the time of day and other information. When the on-time portion of the duty cycle indicates that the transceiver is to be powered-on from a power-conserving sleep state to a full-power active state, a microprocessor causes power to be applied to the radio transceiver circuitry. Because they are synchronized, all transceivers of the system simultaneously power-on in this manner. In the active state, there is sufficient power for radio communication between the transceivers, and the users can use the transceivers in the conventional manner during the active state. The transceivers remain in the active state until the off-time portion of the duty cycle indicates to the microprocessor that the transceiver is to be powered-off from the active state to the sleep state. The cycle repeats periodically in accordance with the duty cycle.

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First Claim