Tags for automated location and monitoring of moveable objects and related systems

1. A method, comprising:

receiving, at an identification tag associated with a moveable object and in a sleep state, a wake-up signal;

waking, responsive to the wake-up signal, the identification tag;

listening, while the identification tag is awake and at the identification tag, for a signal from at least one receiver, wherein the signal requests information regarding the identification tag;

responsive to not receiving a signal, returning the identification tag to a sleep state after expiration of a back-off timer having a predetermined timer duration; and

responsive to receiving a signal from at least one receiver, transmitting, to the least one receiver from an identification tag associated with a moveable object, information related to an environment surrounding the identification tag and information related to a location of the identification tag.

2. The method of claim 1 , wherein the information related to an environment comprises at least one of: temperature, humidity, motion, gas levels, speed, direction, and position.

3. The method of claim 1 , wherein the identification tag comprises a rotatable tag.

4. The method of claim 1 , wherein the identification tag is affixed to the moveable object.

5. The method of claim 1 , wherein the wake-up signal is received in response to expiration of a predetermined time period associated with a timer.

6. The method of claim 5 , wherein responsive to not receiving a signal during a wake period of the identification tag the predetermined time period is increased.

7. The method of claim 1 , wherein the returning the identification tag to a sleep mode is further responsive to not receiving a signal within the predetermined timer duration.

8. The method of claim 1 , wherein the wake-up signal is provided randomly using time and frequency division multiplex control by prime coefficients.

9. The method of claim 1 , wherein the transmitting further comprises transmitting information regarding a use state of the moveable object.

10. The method of claim 9 , wherein the use state of the moveable object is determined from the identification tag.

11. The method of claim 9 , wherein the use state comprises available for use, in use, needs cleaning and/or needs service.

12. The method of claim 9 , wherein the moveable object comprises a hospital patient.

13. The method of claim 12 , wherein the use state comprises a state of the patient.

14. The method of claim 1 , wherein the movable object comprises a piece of hospital equipment.

15. The method of claim 14 , wherein the piece of hospital equipment comprises an object selected from the group consisting of: hospital bed, infusion pump, electrocardiogram device, pulse oximeter, vital signs monitor, hypothermia machine, kangaroo pump, neonatal ventilator, and sequential compression device.

16. The method of claim 1 , wherein the information related to an environment is derived from at least one sensor of the identification tag.

17. The method of claim 16 , wherein the at least one sensor comprises at least one sensor selected from the group consisting of: a temperature sensor, a motion sensor, a humidity sensor, a gas sensor, a carbon monoxide sensor, an accelerometer, and a gyroscope.

18. The method of claim 1 , wherein the at least one receiver comprises a receiver located in a hospital.

19. The method of claim 1 , wherein the at least one receiver and the identification tag communicate over a radio frequency link.

20. The method of claim 1 , wherein the identification tag is configured to operate on multiple radio frequencies.