REAL TIME LOCATION SYSTEM AND METHOD FOR CACHING LOCATION INFORMATION BASED ON FINGER PRINTING

• US 20110128124A1
• Filed: 12/01/2010
• Published: 06/02/2011
• Est. Priority Date: 12/02/2009
• Status: Active Grant

• Current Assignee: LS Industrial Systems Company Limited
• Original Assignee: LS Industrial Systems Company Limited
• Inventors: IM, Chang Jun
• Granted Patent: US 8,674,828 B2
• Time in Patent Office: Days
• US Class Current: 340/8.1
• CPC Class Codes: G01S 5/02524 Creating or updating the radio-map

Abstract

Disclosed is a location tracking system and the method thereof for storing location information. The location tracking system includes at least one beacon apparatus arranged to transmit a beacon signal to a tag; a tag at any position respectively measuring a signal intensity of beacon signals received from surrounding at least one beacon apparatus, and transmitting a measured per-beacon signal intensity to a specific beacon apparatus; and a server arranged to determine if at least any one of signal intensities exceeds a set maximum value by analyzing a per-beacon signal intensity input from the specific beacon apparatus, and store a location-based signal intensity into a database by equally dividing a distance between corresponding beacon apparatuses and then distributing a measured signal intensity into a divided each position in mutiple cases the signal intensity exceeds a set maximum value.

Claims

1. A location tracking system for storing finger-print based location information, comprising:

at least one beacon apparatus arranged to transmit a beacon signal to a tag;

a tag at any position respectively measuring a signal intensity of beacon signals received from surrounding at least one beacon apparatus, and transmitting a measured per-beacon signal intensity to a specific beacon apparatus; and

a server arranged to determine if at least any one of signal intensities exceeds a set maximum value by analyzing a per-beacon signal intensity input from the specific beacon apparatus, and store a location-based signal intensity into a database by equally dividing a distance between corresponding beacon apparatuses and then distributing a measured signal intensity into a divided each position in mutiple cases the signal intensity exceeds a set maximum value.

2. The location tracking system of claim 1, wherein the beacon signal includes unique identification information, wherein the unique identification information is an MAC (media access control) address.

3. The location tracking system of claim 1, wherein a maximum value set in the server is equal to a maximum signal intensity of a received signal.

4. The location tracking system of claim 1, wherein the server includes,

a signal strength determination unit determining if at least any one of signal intensities exceeds a set maximum value by analyzing a beacon-based signal intensity input from a specific beacon apparatus;

a beacon counter increasing a beacon count in a case the signal intensity exceeds a maximum value; and

a location information processing unit storing a location-based signal intensity into a database by equally dividing a measured distance between beacon apparatuses and then distributing a measured signal intensity into a divided each position in a case the beacon count equals a reference value compared with the set reference value.

5. A finger print-based location information storing method, comprising:

measuring a signal intensity of a beacon signal received from a surrounding beacon apparatus, and transmitting a measured beacon-baed signal intensity through a specific beacon apparatus to a server, by a tag;

determining if there is at least any one signal intensity equal to or exceeding a set maximum value by analyzing a beacon-based signal intensity input from the specific beacon apparatus, by a server;

recording a position of a corresponding beacon apparatus, increasing a beacon count by one, and then storing a beacon-based measurement time and signal intensity by a server in a case the at least one signal intensity equals or exceeds a maximum value;

storing the beacon-based measurement time and signal intensity and determining if the beacon count equals a set reference value; and

storing signal intensity-based location information by equally dividing a distance between a multiple of beacon apparatuses and then distributing a signal intensity into a divided each position in a case the beacon count equals a set reference value.

6. The method of claim 5, wherein a value of the beacon count is equal to a number of a beacon apparatus detected to maximum values, wherein a beacon count initializes when location information between a multiple of beacon apparatuses is built up.

7. The method of claim 5, wherein if a beacon count does not amount to a set reference value, a step of determining if there exists a beacon-based signal intensity input from the specific beacon apparatus equaling or exceeding a set maximum value is re-performed.

8. The method of claim 5, wherein if at lease any one signal intensity of the above-mentioned does not amount to a maximum value, a beacon-based current time and signal intensity is stored.

9. The method of claim 5, wherein the server is equal to a maximum signal intensity of a received signal.