Motion detection by a central controller using beamforming dynamic information
In a general aspect, motion is detected using wireless signals. In one example, a wireless signal transmitted through a space from a first wireless communication device is received at a second wireless communication device. Dynamic beamforming information is based on the wireless signal. The second wireless communication device uses the dynamic beamforming information to detect motion in the space, or transmits the dynamic beamforming information to the first wireless communication device for use in detecting motion in the space.
1. A motion detection method, comprising:
receiving, at a second wireless communication device, wireless signals transmitted through a space from a first wireless communication device;
generating dynamic beamforming information based on the wireless signals; and
by operation of the second wireless communication device, performing one of:
using the dynamic beamforming information to detect motion in the space; or
transmitting the dynamic beamforming information to the first wireless communication device for use in detecting motion in the space;
wherein detecting motion in the space comprises:
generating spatial maps based on the dynamic beamforming information, and
analyzing changes in the spatial maps over time.
2. The method of claim 1 , wherein the first wireless communication device is a central controller and the second wireless communication device is an observation device.
3. The method of claim 1 , wherein a first wireless signal of the wireless signals is a wireless standard protocol message, and the second wireless communication device sends the dynamic beamforming information to the first wireless communication device in a corresponding wireless standard protocol response.
4. The method of claim 1 , wherein the wireless signals comprise a broadcast signal.
5. The method of claim 1 , wherein the wireless communication device and the second wireless communication device comprise an ad-hoc motion sensing network.
6. The method of claim 1 , wherein the first wireless communication device and the second wireless communication device communicate in a mesh network.
7. The method of claim 1 , wherein the dynamic beamforming information is one of:
an H-matrix;
a V-matrix; or
a compressed V-matrix.
8. The method of claim 1 , wherein the wireless signals comprise a wireless standard protocol message generated by the first wireless communication device according to a wireless communication standard.
9. The method of claim 8 , wherein the wireless standard protocol message comprises a ping addressed to the second wireless communication device.
10. The method of claim 8 , wherein the wireless standard protocol message comprises a ping to a plurality of neighbor devices including the second wireless communication device.
11. The method of claim 8 , wherein the wireless standard protocol message comprises data traffic.
12. The method of claim 1 , comprising using the dynamic beamforming information to detect a location of the object in the space.
13. The method of claim 1 , comprising determining to use the dynamic beamforming information to detect motion by operation of motion detection software on the second wireless communication device based on identifying that the second wireless communication device comprises the motion detection software.
14. The method of claim 1 , comprising determining to transmit the dynamic beamforming information to the first wireless communication device for motion detection based on identifying that the second wireless communication device does not comprise motion detection software.
15. A wireless communication device comprising:
a processor; and
a memory comprising instructions which, when executed by the processor, cause the wireless communication device to perform operations comprising:
receiving wireless signals transmitted through a space from a first wireless communication device;
generating dynamic beamforming information based on the wireless signals; and
performing one of:
using the dynamic beamforming information to detect motion in the space; or
transmitting the dynamic beamforming information to the first wireless communication device for use in detecting motion in the space;
wherein detecting motion in the space comprises:
generating spatial maps based on the dynamic beamforming information, and
analyzing changes in the spatial maps over time.
16. The device of claim 15 , wherein the first wireless communication device is a central controller and the second wireless communication device is an observation device.
17. The device of claim 15 , wherein the wireless signals comprise a wireless standard protocol message, and the second wireless communication device sends the dynamic beamforming information to the first wireless communication device in a corresponding wireless standard protocol response.
18. The device of claim 15 , wherein the wireless signals comprise a broadcast signal.
19. The device of claim 15 , wherein the first wireless communication device and the second wireless communication device comprise an ad-hoc motion sensing network.
20. The device of claim 15 , wherein the first wireless communication device and the second wireless communication device communicate in a mesh network.
21. The device of claim 15 , wherein the dynamic beamforming information is one of:
an H-matrix;
a V-matrix; or
a compressed V-matrix.
22. The device of claim 15 , wherein the wireless signals comprise a wireless standard protocol message generated by the first wireless communication device according to a wireless communication standard.
23. The device of claim 22 , wherein the wireless standard protocol message comprises a ping addressed to the second wireless communication device.
24. A non-transitory computer-readable medium comprising instructions that, when executed by data processing apparatus, perform operation comprising:
receiving, at a second wireless communication device, wireless signals transmitted through a space from a first wireless communication device;
generating a dynamic beamforming information based on the wireless signals; and
at the second wireless communication device, performing one of:
using the dynamic beamforming information to detect motion in the space; or
transmitting the dynamic beamforming information to the first wireless communication device for use in detecting motion in the space;
wherein detecting motion in the space comprises:
generating spatial maps based on the dynamic beamforming information, and
analyzing changes in the spatial maps over time.
25. The computer-readable medium of claim 24 , wherein the first wireless communication device is a central controller and the second wireless communication device is an observation device.
26. The computer-readable medium of claim 24 , wherein the wireless signals comprise a wireless standard protocol message, and the second wireless communication device sends the dynamic beamforming information to the first wireless communication device in a corresponding wireless standard protocol response.
27. The computer-readable medium of claim 24 , wherein the first wireless communication device and the second wireless communication device comprise an ad-hoc motion sensing network.
28. The computer-readable medium of claim 24 , wherein the dynamic beamforming information is one of:
an H-matrix;
a V-matrix; or
a compressed V-matrix.
29. The computer-readable medium of claim 24 , wherein the wireless signals comprise a wireless standard protocol message generated by the first wireless communication device according to a wireless communication standard.
30. The computer-readable medium of claim 29 , wherein the wireless standard protocol message comprises a ping addressed to the second wireless communication device.