Base station and mobile terminal for location detection, and location detecting method

• US 20050128142A1
• Filed: 06/30/2004
• Published: 06/16/2005
• Est. Priority Date: 12/10/2003
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Hyun, Shin, Chang-Sub, Oh, Hyun-Seo
• Granted Patent: US 7,714,784 B2
• Time in Patent Office: Days
• US Class Current: 342/386
• CPC Class Codes: G01S 1/08 Systems for determining direction or position line
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system

Abstract

Disclosed are a base station and a mobile terminal for location detection, and a location detecting method. The base station in which a plurality of antennas having RF modules are installed transmits a signal including location information of each of the antennas to the mobile terminal. The mobile terminal carries out location detection by selectively using location information received from a GPS receiver or location information received from a DSRC transceiver. The base station and mobile terminal for location detection can perform location detection with high accuracy using the existing DSRC service. Thus, the base station and mobile terminal can carry out location detection having an error of approximately 10 m in downtown areas or buildings.

Claims

1. A base station for location detection, comprising:

a location information generator for generating location information of each of a plurality of antennas arranged at specific intervals;

a central processing unit for preventing the antennas from interfering with one another, processing data transmitted and received between the base station and a mobile terminal, generating a periodic beacon signal, and transmitting it to the mobile terminal;

a location information processor for loading the location information of each of the antennas generated by the location information generator in a header of the beacon signal and transmitting the beacon signal to a corresponding antenna; and

a modulating/demodulating unit for converting data transmitted and received between the central processing unit and the antennas into an analog or digital signal.

2. The base station as claimed in claim 1, further comprising a plurality of multiplexers for simultaneously outputting the beacon signal, transmitted from the central processing unit through the modulating/demodulating unit, to the antennas.

3. The base station as claimed in claim 1, further comprising a buffer for receiving data transmitted from the mobile terminal through the plurality of antennas and delivering the data to the modulating/demodulating unit.

4. The base station as claimed in claim 1, wherein a cell diameter of each of the antennas is 10 to 15 m.

5. A mobile terminal for location detection, comprising:

a GPS receiver for detecting a location of a base station using a GPS;

a DSRC transceiver for extracting location information from a beacon signal transmitted from the base station in an area where location detection is impossible through the GPS receiver to detect the location of the base station; and

a central processing unit for extracting location detection data through the GPS receiver or the DSRC transceiver and displaying it on a map.

6. A location detecting method comprising:

a) generating location information of each of a plurality of antennas arranged at specific intervals and loading the location information in a header of a beacon signal to be transmitted to a mobile terminal; and

b) synchronizing the antennas and simultaneously transmitting the beacon signal to the antennas.

7. The location detecting method as claimed in claim 6, further comprising receiving data from the mobile terminal through the antennas and processing the data.

8. The location detecting method as claimed in claim 6, wherein a) comprises switching antenna cells in order to remove cell interference of the antenna cells.

9. The location detecting method as claimed in claim 6, wherein a) comprises carrying out output cell planning such that the antennas maintain the specific intervals in order to remove interference of the antenna cells.

10. A location detecting method comprising:

a) detecting a beacon signal including location information, transmitted from a base station, through a DSRC module installed in a mobile terminal;

b) when the beacon signal is detected, extracting the location information from the beacon signal to use it as location detection data; and

c) when the beacon signal is not detected, using location detection data detected using a GPS.