Patent ID: 8606338
Filing Date: 2013-12-10
Classification: H04W,Y02D

Abstract:
1. A first, ambulatory device capable of engaging in wireless two-way communication with at least a second device, comprising: a first sensor configured to monitor a physical or physiological condition of a person while being transported by the person or by an article worn by the person; a first transmitter; a first receiver; and at least one first controller coupled to the first sensor, the first transmitter, and the first receiver, the at least one first controller being configured to power on the first receiver to listen for second messages from the second device during finite time periods following use of the first transmitter to transmit respective first messages to the second device, the at least one first controller being further configured to cause at least some of the first messages to include data concerning the physical or physiological condition of the person monitored by the first sensor, and to power down the first receiver after each of the finite time periods following use of the transmitter to transmit respective first messages to the second device.