Time-reversal indoor detection system and method

Patent metadata

Field	Value
Publication number	US-10510235-B2
Application number	US-201815935676-A
Country	US
Kind code	B2
Filing date	Mar 26, 2018
Priority date	Oct 17, 2017
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A time-reversal indoor detection system and method are provided. The system includes an anchor node device, an access point (AP) device, and a first electronic device. The first wireless communication circuit of the anchor node device is configured to send a probe signal, a third wireless communication circuit of the access point device is configured to receive the probe signal, a processor is configured to obtain a current CSI from the probe signal, and to compare the current CSI to a preset CSI, and when a first CSI included in the preset CSI is matched to the current CSI, a second wireless communication circuit of the anchor node device is configured to activate at least one function of a first electronic device through a second communication protocol.

First claim

What is claimed is:

1. A time-reversal indoor detection system, comprising:
an anchor node device, including:
a first wireless communication circuit supporting a first communication protocol; and
a second wireless communication circuit supporting a second communication protocol;
an access point (AP) device, comprising:
a processor;
a memory connected to the processor, configured to store a preset channel state information (CSI), wherein the preset CSI includes a first CSI and a normal CSI; and
a third wireless communication circuit supporting the first communication protocol and connected to the processor, communicating with the first wireless communication circuit through the first communication protocol within an indoor space; and

a first electronic device, including a fourth wireless communication circuit supporting the second communication protocol, and communicating with the second communication circuit through the second communication protocol,
wherein the first wireless communication circuit is configured to send a probe signal,
wherein the third wireless communication circuit is configured to receive the probe signal,
wherein the processor is configured to obtain a current CSI from the probe signal, and to compare the current CSI to the preset CSI, and
wherein when the first CSI is matched to the current CSI, the second wireless communication circuit is configured to activate at least one function of the first electronic device through the second communication protocol,
wherein the processor is configured to calculate a first time-reversal resonating strength (TRRS) value between the current CSI and the first CSI, and a second TRRS value between the current CSI and the normal CSI, and
wherein the first CSI is determined to be matched to the current CSI if the first TRRS value is larger than the second TRRS value and a threshold.

2. The time-reversal indoor detection system according to claim 1 , wherein the preset CSI is a reversed and conjugated sequence of a CSI of the probe signal.

3. The time-reversal indoor detection system according to claim 1 , wherein an operation power of the first wireless communication circuit is higher than an operation power of the second wireless communication circuit.

4. The time-reversal indoor detection system according to claim 3 , wherein the first electronic device further includes a fifth wireless communication circuit supporting the first communication protocol, and communicating with the third wireless communication circuit through the first communication protocol.

5. The time-reversal indoor detection system according to claim 4 wherein the first electronic device is a camera device, and an image capture function of the camera device is configured to be activated when the first CSI is matched to the current CSI.

6. The time-reversal indoor detection system according to claim 5 , wherein the third wireless communication circuit is further configured to send a request signal to the first wireless communication circuit, and the second wireless communication circuit is configured to change an operation mode of the fifth wireless communication circuit from a turn-off mode to an active mode according to the request signal.

7. The time-reversal indoor detection system according to claim 1 , wherein the first CSI and the normal CSI are respectively obtained by performing a time-reversal operation on the probe signal in response to a first event and a normal event occurring in the indoor space.

8. The time-reversal indoor detection system according to claim 1 , further comprising a second electronic device configured to be the same as the first electronic device, wherein the first electronic device and the second electronic device are disposed in a first region and a second region of the indoor space, respectively,
wherein the preset CSI further includes a second CSI, and
wherein the second wireless communication circuit is configured to activate at least one function of the second electronic device when the second CSI is matched to the current CSI.

9. The time-reversal indoor detection system according to claim 8 , wherein the first CSI, the second CSI and the normal CSI are respectively a reverse sequence of a CSI of the probe signal in response to a first event occurring in the first region of the indoor space, a second event occurring in the second region of the indoor space and a normal event occurring in the indoor space.

10. A time-reversal indoor detection method, comprising:
communicating a first wireless communication circuit of an anchor node device with a third wireless communication circuit of an access point device through a first communication protocol within an indoor space, wherein the access point device further includes a processor, and a memory connected to the processor, the memory is configured to store a preset channel state information (CSI), and wherein the preset CSI includes a first CSI and a normal CSI;
communicating a second communication circuit of the anchor node device with a fourth wireless communication circuit of a first electronic device through a second communication protocol;
configuring the first wireless communication circuit to send a probe signal;
configuring the third wireless communication circuit to receive the probe signal; and
configuring the processor to obtain a current CSI from the probing signal, and to compare the current CSI to the preset CSI, wherein when the first CSI is matched to the current CSI, the second communication circuit is configured to activate at least one function of the first electronic device through the second communication protocol; and
configuring the processor to calculate a first time-reversal resonating strength (TRRS) value between the current CSI and the first CSI, and a second TRRS value between the current CSI and the normal CSI, wherein the first CSI is determined to be matched to the current CSI when the first TRRS value is larger than the second TRRS value and a threshold.

11. The time-reversal indoor detection method according to claim 10 , wherein the preset CSI is a reverse sequence of a CSI of the probe signal.

12. The time-reversal indoor detection method according to claim 10 , wherein an operation power of the first communication protocol is higher than an operation power of the second communication.

13. The time-reversal indoor detection method according to claim 12 , further comprising:
configuring a fifth wireless communication circuit of the first electronic device to communicate with the third wireless communication circuit through the first communication protocol.

14. The time-reversal indoor detection system according to claim 13 , wherein the first electronic device is a camera device, and an image capture function of the camera device is configured to be activated when the first CSI is matched to the current CSI.

15. The time-reversal indoor detection method according to claim 14 , further comprising:
configuring the third wireless communication circuit to send a request signal to the first wireless communication circuit; and configuring the second wireless communication circuit to change an operation mode of the fifth wireless communication circuit from a turn-off mode to an active mode according to the request signal.

16. The time-reversal indoor detection method according to claim 10 , further comprising:
respectively obtaining the first CSI and the normal CSI by performing a time-reversal operation on the probe signal in response to a first event and a normal event occurring in the indoor space.

17. The time-

Assignees

• Wistron Neweb Corp

Inventors

• Wei Ya-Ping
• Cheng Chieh-Wen
• Chen Horen

Classifications

• G08B13/19695 Primary

  Arrangements wherein non-video detectors start video recording or forwarding but do not generate an alarm themselves · CPC title

• G08B13/19669

  Event triggers storage or change of storage policy · CPC title

• G08B13/1966

  Wireless systems, other than telephone systems, used to communicate with a camera · CPC title

• G08B13/19

  using infrared-radiation detection systems {(G08B13/194 takes precedence)} · CPC title