Patent ID: 8155105
Filing Date: 2012-04-10
Classification: H04W,Y02D

Abstract:
1. A monitoring system, comprising: a central device and monitoring devices having wireless communication therebetween, each of the devices including a wireless communication circuit to effect wireless communications between the central device and the monitoring devices, the central device and at least one of the monitoring devices to effect wireless communications therebetween by using communication intervals to define communication therebetween and a sequence of multiple frequencies for communicating between the central device and said at least one monitoring device; the central device and said at least one monitoring device configured for synchronizing communications with one another based on the communication intervals and at least a selected one of the multiple frequencies that represents a starting transmission frequency; at least one of the central device and said at least one monitoring device configured for reducing power consumption therein as a function of a transmission anticipation time calculated from the communication intervals, the number of frequencies in the sequence of multiple frequencies that are between a receiving frequency of the multiple frequencies that is different from said selected one of the multiple frequencies and said selected one of the multiple frequencies; and wherein said at least one of the devices relies on a limited power source and the central device collects monitoring data from the monitoring devices while mitigating power consumption from the limited power source.