LOCATION DETERMINATION METHOD AND LOCATION DETERMINATION SYSTEM FOR SENSOR APPARATUS PLACEMENTS IN BUILDING

• US 20160262032A1
• Filed: 12/15/2014
• Published: 09/08/2016
• Est. Priority Date: 09/11/2014
• Status: Active Grant

• Current Assignee: Ewha University-Industry Collaboration, EWHA University-Industry Collaboration Foundation (Ewha Womans University)
• Original Assignee: EWHA University-Industry Collaboration Foundation (Ewha Womans University)
• Inventors: KIM, Jeong-Ho
• Granted Patent: US 10,091,674 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 5/013 Identifying areas in a building
• CPC Class Codes: H04L 12/28 characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] wireless communication networks H04W ; arrangements for dividing the transmission path H04W40/00
• CPC Class Codes: H04L 43/0847 Transmission error
• CPC Class Codes: H04L 43/0894 Packet rate
• CPC Class Codes: H04L 43/10 Active monitoring, e.g. heartbeat, ping or trace-route
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/06 Testing, supervising or monitoring using simulated traffic
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A location determining method 200 for sensor apparatus placements in building includes: a step in which a first measuring device transmits a digitally modulated first test packet through a specific channel at a first location in a building (210); a step in which a second measuring device receives the first test packet and transmits a first echo back signal through the specific channel at a second location in the building (220); a step in which the first measuring device receives the first echo back signal transmitted from the second measuring device and measures a first channel quality of the specific channel based on the first echo back signal (230); a step in which the first measuring device transmits a digitally modulated second test packet through the specific channel (240); a step in which the second measuring device receives the second test packet and transmits a second echo back signal through the specific channel (250); and a step in which the first measuring device receives the second echo back signal transmitted from the second measuring device and measures a second channel quality of the specific channel based on the second echo back signal (260).

Claims

1. A location determining method for sensor apparatus placements in building comprising:

a step in which a first measuring device transmits a digitally modulated first test packet through a specific channel at a first location in a building;

a step in which a second measuring device receives the first test packet and transmits a first echo back signal through the specific channel at a second location in the building; and

a step in which the first measuring device receives the first echo back signal transmitted from the second measuring device and measures a first channel quality of the specific channel based on the first echo back signal.

2. The location determining method of claim 1, wherein the digital modulation is PSK (Phase Shift Keying) or QAM (Quadurature Amplitude Modulation).

3. The location determining method of claim 1, wherein the first measuring device measure the first channel quality based on at least one of a time period from when transmitting the first test packet to when receiving the first echo back signal, intensity of the first echo back signal, or a transmission rate of the first echo back signal.

4. The location determining method of claim 1, wherein the first measuring device waits for the first echo back signal for a reference time period after transmitting the first test packet, transmits the first test packet again if the first echo back signal is not received by the reference time period, and waits for the first echo back signal for a time period increased from the reference time period by a certain amount.

5. The location determining method of claim 1, further comprising:

a step in which the first measuring device transmits a digitally modulated second test packet through the specific channel;

a step in which the second measuring device receives the second test packet and transmits a second echo back signal through the specific channel; and

a step in which the first measuring device receives the second echo back signal transmitted from the second measuring device and measures a second channel quality of the specific channel based on the second echo back signal.

6. The location determining method of claim 5, wherein the first measuring device measures the second channel quality based on at least one of a time period from when transmitting the second test packet to when receiving the second echo back signal, intensity of the second echo back signal, or a transmission rate of the second echo back signal.

7. The location determining method of claim 5, wherein the second measuring device measures a channel quality of the specific channel based on at least one of a time period from when transmitting the second echo back signal to when receiving the second test packet, intensity of the second test packet, or a transmission rate of the second test packet.

8. A location determining system for sensor apparatus placements in building comprising:

a first measuring device which is located at a first location in a building and configured to transmit a digitally modulated first test packet through a specific channel, receive a first echo back signal from a second measuring device, and measure a channel quality of the specific channel; and

the second measuring device which is located at a second location in the building and configured to receive the first test packet, and transmit the first echo back signal through the specific channel.

9. The location determining system of claim 8, wherein the first measuring device measures the channel quality based on at least one of a time period from when transmitting the first test packet to when receiving the first echo back signal, intensity of the first echo back signal, or a transmission rate of the first echo back signal.

10. The location determining system of claim 8, wherein the first echo back signal includes the test packet received by the second measuring device.

11. The location determining system of claim 8, wherein the first measuring device transmits a second test packet after receiving the first echo back signal, receives a second echo back signal from the second measuring device, and measures a channel quality of the specific channel, and

the second measuring device receives the second test packet and receives the second echo back signal in response to the second test packet.

12. The location determining system of claim 11, wherein the first measuring device measures the second channel quality based on at least one of a time period from when transmitting the second test packet to when receiving the second echo back signal, intensity of the second echo back signal, or a transmission rate of the second echo back signal.

13. The location determining system of claim 11, wherein second measuring device measures a channel quality of the specific channel based on at least one of a time period from when transmitting the second echo back signal to when receiving the second test packet, intensity of the second test packet, or a transmission rate of the second test packet.

14. The location determining system of claim 8, wherein the digital modulation is PSK (Phase Shift Keying) or QAM (Quadurature Amplitude Modulation).

15. The location determining system of claim 11, wherein the first measuring device includes:

a signal generation unit that generates the first test packet and the second test packet;

a transmitting/receiving unit that transmits the first test packet and the second test packet and receives the first echo back signal and the second echo back signal;

a quality measuring unit that measures the channel quality based on at least one of the first echo back signal and the second echo back signal; and

a measurement data storage unit that stores the channel quality.

16. The location determining system of claim 11, wherein the second measuring device includes:

a signal generation unit that generates the first echo back signal and the second echo back signal;

a transmitting/receiving unit that transmits the first echo back signal and the second echo back signal and receives the first test packet and the second test packet;

a quality measuring unit that measures the channel quality based on at least one of the first test packet and the second test packet; and

a measurement data storage unit that stores the channel quality.