Method and apparatus for location search of portable device in wireless communications system

• US 7,095,319 B2
• Filed: 04/08/2004
• Issued: 08/22/2006
• Est. Priority Date: 05/30/2003
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Izumi, Yuji, Nose, Masaki
• Primary Examiner(s): Wu, Daniel
• Assistant Examiner(s): BLOUNT, ERIC
• Application Number:
  US10/820,038
• Publication Number:
  US 20040239530A1
• Time in Patent Office: 866 Days
• Field of Search: 340/425.5
• US Class Current: 340/539.11
• CPC Class Codes: G01S 5/0036 of measured values, i.e. measurement on mobile and position calculation on base station
• CPC Class Codes: G01S 5/02525 Gathering the radio frequency fingerprints

Abstract

There is disclosed a location search system which detects a position coordinate of a data processing device based on received radio wave information transmitted from the data processing device having a wireless communications function. The location search system includes a server including a search unit which searches region information specifying a location of the data processing device from a region information database based on calculated position coordinate information.

Claims

1. A system for location search of a data processing device including a wireless communications unit and a unit to output received radio wave information for location detection, the system comprising:

a unit which acquires the received radio wave information from the data processing device by wireless communications;

a location detection unit which calculates position coordinate information to specify a location of the data processing device based on the received radio wave information;

a region information database in which region information is stored to designate a spatial range associated with the position coordinate information, the region information database storing space identification information which specifies the spatial range associated with the position coordinate information, and the region information including control information indicating a predetermined control process for the spatial range; and

a search unit which searches the region information corresponding to the position coordinate information calculated by the location detection unit from the region information database.

2. The system according to claim 1, wherein the region information database stores space identification information specifying the spatial range associated with the position coordinate information and the region information including control information indicating a predetermined process for each spatial range,

the system further comprising:

a computer system which manages the location of the data processing device; and

means for transferring the position coordinate information and the region information to the computer system,

the computer system including;

a unit which uses the position coordinate information and the region information to produce display information capable of confirming the location of the data processing device;

a display device which displays the display information on a display; and

a controller which executes the predetermined control process set for the spatial range corresponding to the location of the data processing device in accordance with the control information.

3. The system according to claim 2, wherein the controller executes a control so as to prohibit the display information from being displayed or to change the display information to a predetermined content, based on the control information.

4. The system according to claim 1, further comprising:

a controller which executes a predetermined alarm process, when the control information indicates an alarm.

5. A system for location search of a data processing device including a wireless communications unit and a unit to output received radio wave information for location detection, the system comprising:

a unit which acquires the received radio wave information from the data processing device by wireless communications;

a location detection unit which calculates position coordinate information to specify a location of the data processing device based on the received radio wave information;

a region information database in which region information is stored to designate a spatial range associated with the position coordinate information, the region information database storing the region information including space identification information specifying the spatial range associated with the position coordinate information,

the space identification information including;

a space name allocated to the spatial range;

range identification information which identifies a spatial range set for each of a plurality of different position coordinate information and which indicates the same content when a plurality of spatial ranges specified by the plurality of different position coordinate information are treated as the same spatial range; and

entrance/exit information indicating a position coordinate of an entrance/exit with respect to the spatial range; and

a search unit which searches the region information corresponding to the position coordinate information calculated by the location detection unit from the region information database,

the search unit including movement detection means for detecting that the data processing device has moved to a different spatial range based on the position coordinate information calculated by the location detection unit,

wherein the search unit ignores a movement detected by the movement detection means as an error if, when searching the region information from the region information database based on the position coordinate information calculated by the location detection unit, the search unit judges that the data processing device has moved to the different spatial range through a range other than the entrance/exit indicated by the entrance/exit information.

6. A method of location search of a data processing device including a wireless communications unit and a unit to output received radio wave information for location detection, the method comprising:

calculating position coordinate information to specify a location of the data processing device based on the received radio wave information acquired from the data processing device by wireless communications;

referring to a region information database in which region information is stored to designate a spatial range associated with the position coordinate information;

searching the region information corresponding to the position coordinate information from the region information database, the region information database storing space identification information to specify the spatial range associated with the position coordinate information, and the region information including control information indicating a predetermined control process for the spatial range;

transferring the position coordinate information and the region information to a computer system which manages the location of the data processing device, the computer system using the position coordinate information and the region information to display information capable of confirming the location of the data processing device on a display; and

executing the predetermined control process for the spatial range corresponding to the location of the data processing device in accordance with the control information.

7. A method of location search of a data processing device including a wireless communications unit and a unit to output received radio wave information for location detection, the method comprising:

calculating position coordinate information to specify a location of the data processing device based on the received radio wave information acquired from the data processing device by wireless communications; and

referring to a region information database in which region information is stored to designate a spatial range associated with the position coordinate information, and searching the region information database for the region information corresponding to the position coordinate information, the region information database storing space identification information to specify the spatial range associated with the position coordinate information, and the region information including entrance/exit information indicating a position coordinate of an entrance/exit with respect to the spatial range;

detecting that the data processing device has moved to a different spatial range based on the position coordinate information; and

ignoring a detected movement as an error when searching the region information from the region information database based on the position coordinate information and judging that the data processing device has moved to the different spatial range through a range other than the entrance/exit indicated by the entrance/exit information.