Method and apparatus for wireless asset tracking using asset tags with motion sensors

1. A system, comprising:

an asset tag associated with an asset, the asset tag having a motion sensor configured to detect a movement of the asset;

a plurality of readers, each reader configured to receive one or more signals from the asset tag and measure a distance between the asset tag and the reader based on the one or more signals;

a controller configured to receive a measured distance from each of the plurality of readers and determine a location of the asset based on the measured distances; and

a user interface configured to highlight information associated with the asset when the asset is in motion.

2. The system of claim 1 , wherein the asset tag is attached to the asset.

3. The system of claim 1 , wherein the asset tag is configured to transmit the one or more signals at a first rate when the asset is stationary.

4. The system of claim 3 , wherein the asset tag is configured to transmit the one or more signals at a second rate when the asset is in motion.

5. The system of claim 4 , wherein the first rate is different from the second rate.

6. The system of claim 4 , wherein the second rate is faster than the first rate.

7. A method, comprising:

detecting a movement of an asset using an asset tag having a motion sensor;

transmitting one or more signals at a first rate in response to detecting a movement of the asset; and

displaying on a user interface highlighted information associated with the asset when the asset is in motion.

8. The method of claim 7 , further comprising:

measuring a distance from the asset tag to each of a plurality of readers using the one or more signals; and

determining a location of the asset using the measured distances.

9. The method of claim 8 , further comprising:

averaging at least some of the measured distances to determine the location of the asset.

10. The method of claim 7 , further comprising:

transmitting the one or more signals at a second rate in an absence of a detected movement of the asset.

11. The method of claim 10 , wherein the first rate is different from the second rate.

12. The method of claim 10 , wherein the first rate is faster than the second rate.

13. The method of claim 7 , further comprising:

signaling an alarm in response to detecting the movement of the asset.

14. A system, comprising:

a plurality of readers, each reader configured to receive one or more signals from an asset tag associated with an asset and measure a distance between the asset tag and the reader based on the one or more signals;

a controller configured to receive a measured distance from each of the plurality of readers and determine a location of the asset based on the measured distances; and

a user interface configured to highlight information associated with the asset when the asset is in motion.

15. The system of claim 14 , wherein each reader is configured to receive the one or more signals at a first rate when the asset is stationary and receive the one or more signals at a second rate when the asset is in motion.

16. The system of claim 15 , wherein the first rate is different from the second rate.

17. The system of claim 15 , wherein the second rate is faster than the first rate.

18. The system of claim 15 , wherein the controller is configured to average at least some of the measured distances to determine the location of the asset.

19. The system of claim 15 , wherein the one or more signals comprise information indicating whether the asset is stationary.

20. The system of claim 19 , wherein the measured distances of the asset from each of the plurality of readers are used to determine a location of the asset.