Patent ID: 11924912
Assignee: ATTENTI ELECTRONIC MONITORING LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A monitoring device, comprising:
a processor and memory configured to store and execute a program to detect nearby monitoring devices;
a real-time clock configured to keep track of periodic preselected times for the monitoring devices to communicate with nearby monitoring devices;
a short range transceiver configured to communicate with nearby monitoring devices;
wherein the processor executes a program to perform the following three stages upon approaching the periodic preselected times:
a) placing the monitoring device in receive mode for a first selected amount of time before reaching the periodic preselected times; wherein in receive mode the monitoring device is configured to listen for control signals identifying a transmitting monitoring device from nearby monitoring devices;
b) placing the monitoring device in receive mode for a second selected amount of time and upon completing without detecting nearby monitoring devices, the monitoring device transmits its control signal:
c) placing the monitoring device in receive mode for a third selected amount of time after transmitting the control signal;
at any stage while in receive mode upon detecting a control signal transmitted from a nearby monitoring device the monitoring device waits until the end of the transmission of the control signal and records the identity of the nearby monitoring device detected;
during the first selected amount of time and the third selected amount of time the monitoring device resumes monitoring in receive mode until completing the respective selected amount of time; during the second selected amount of time the monitoring device restarts stage b after recording the identity of the detected nearby monitoring device, without transmitting the control signal of the monitoring device.