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

• US 7,714,784 B2
• Filed: 06/30/2004
• Issued: 05/11/2010
• Est. Priority Date: 12/10/2003
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Hyun, Shin, Chang-Sub, Oh, Hyun-Seo
• Primary Examiner(s): Tarcza; Thomas H
• Assistant Examiner(s): Nguyen; Nga X
• Application Number:
  US10/882,525
• Publication Number:
  US 20050128142A1
• Time in Patent Office: 2,141 Days
• Field of Search: 701/215, 342384-386, 342/455, 342/357.09, 342/464, 342/457, 342/445, 342/450, 455/561
• 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 detecting a location of an outdoor mobile terminal, 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 processing data transmitted and received between the base station and the mobile terminal, and generating a periodic beacon signal for transmission to the mobile terminal;

a location information processor for loading the location information of each of the antennas in a header of the beacon signal from the central processing unit, and transmitting the beacon signal with the header to a corresponding antenna, the location information of the corresponding antenna indicating an approximate location of the mobile terminal;

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

a plurality of multiplexers, with each multiplexer associated with one of the antennas and multiplexing at an input end of each multiplexer between the beacon signal and the converted data, the plurality of multiplexers simultaneously outputting the beacon signal, including the header, to the antennas, wherein the beacon signal is transmitted from the location information processor and the converted data is transmitted from the modulating/demodulating unit.

2. 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.

3. The base station as claimed in claim 1, wherein the cell covered by each of the antennas has a diameter of 10 to 15 m.

4. 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 for transmission to a corresponding antenna, the location information indicating an approximate location of a mobile terminal;

b) synchronizing the antennas; and

c) multiplexing, using a plurality of multiplexers with each multiplexer associated with one of the antennas, at an input end of each multiplexer between the beacon signal and converted data from a modulating/demodulating unit, the plurality of multiplexers simultaneously outputting the beacon signal, including the header, to the antennas.

5. The location detecting method as claimed in claim 4, further comprising receiving data from the mobile terminal through the antennas and processing the data.

6. The location detecting method as claimed in claim 4, wherein a) comprises switching reception and transmission of adjacent antenna cells in order to remove cell interference of the adjacent antenna cells.

7. The location detecting method as claimed in claim 4, 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.