Apparatus and method for collecting traffic information using ultra wideband impulse, and system and method for controlling traffic sign using the same

• US 20070053324A1
• Filed: 05/12/2004
• Published: 03/08/2007
• Est. Priority Date: 05/12/2003
• Status: Abandoned Application

• Current Assignee: In-Kwan Hwang
• Original Assignee: In-Kwan Hwang
• Inventors: Hwang, In-Kwan
• Application Number:
  US10/556,556
• Publication Number:
  US 20070053324A1
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: G08G 1/08 according to detected number or speed of vehicles

Abstract

Provided are a traffic information collecting/managing apparatus using ultra wideband impulse, a method thereof, a traffic light control system using the method and a method therefor. The traffic information collecting/managing apparatus includes: a primary wireless communication unit for assigning channels upon receipt of a channel assignment request from a terminal installed in a vehicle, computing location information and speed information, which will be referred to as traffic information, based on time by using ultra wideband impulse response signals transmitted from the terminal and a plurality of secondary wireless communication means, and Transmitting the traffic information to a traffic control server, the wireless communication means for transmitting the ultra wideband impulse response signals transmitted from the terminal to the primary wireless communication unit; and the traffic control server for managing the traffic information transmitted from the primary wireless communication unit in a database so that the traffic information can be applied to traffic-related systems.

Claims

1. An apparatus for collecting/managing traffic information by using ultra wideband impulse, comprising:

a primary wireless communication means for assigning channels upon a channel assignment request from a terminal installed in a vehicle, computing location information and speed information, which will be referred to as traffic information, based on time by using a ultra wideband impulse response signal which is transmitted from the terminal installed in the vehicle and ultra wideband impulse response signals which are transmitted from a plurality of secondary wireless communication means, and transmitting the computed traffic information to a traffic control server;

the multiple number of secondary wireless communication means for transmitting the ultra wideband impulse response signals, which are transmitted from the terminal installed in the vehicle, to the primary wireless communication means; and

the traffic control server for managing the traffic information transmitted from the primary wireless communication means in a database so that the traffic information can be applied to traffic-related systems.

2. The apparatus as recited in claim 1, wherein the terminal installed in the vehicle controls power of a transmitting signal by measuring the intensity of a signal transmitted from the primary wireless communication means to minimize interference on adjacent systems, and release the assigned channels upon a channel release request from the primary wireless communication means.

3. The apparatus as recited in claim 1, wherein the primary wireless communication means, the multiple number of secondary wireless communication means, and the terminal installed in the vehicle utilize a directional antenna to minimize the interference on the adjacent systems.

4. The apparatus as recited in claim 1, wherein the primary wireless communication means, the multiple number of secondary wireless communication means, and the terminal installed in the vehicle transmit/receive signals through a synchronization channel, an access channel, an assignment channel and a ranging channel.

5. The apparatus as recited in claim 1, wherein the primary wireless communication means uses a combination method of Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), and Time Division Duplex (TDD) to maximize the number of vehicles that can be accommodated within a communication coverage.

6. A system for controlling traffic lights by using traffic information, comprising:

a primary wireless communication means for assigning channels upon a channel assignment request from a terminal installed in a vehicle, computing location information and speed information, which will be referred to as traffic information, based on time by using a ultra wideband impulse response signal which is transmitted from the terminal installed in the vehicle and wideband impulse response signals which are transmitted from a plurality of secondary wireless communication means, and transmitting the computed traffic information to a traffic control means;

the multiple number of secondary wireless communication means for transmitting the ultra wideband impulse response signals, which are received from the terminal installed in the vehicle, to the primary wireless communication means; and

the traffic control means for controlling a traffic light based on the traffic information transmitted from the primary wireless communication means.

7. The system as recited in claim 6, further comprising a traffic control server for managing the traffic information transmitted from the primary wireless communication means in a database so that the traffic information can be applied to traffic-related systems.

8. The system as recited in claim 6, where the primary wireless communication means and the three secondary wireless communication means establish a predetermined communication are to reduce complexity of the traffic light control system and communicate with a vehicle entering a coverage independently.

9. A method for collecting/managing traffic information by using ultra wideband impulse, comprising the steps of:

assigning channels upon a channel assignment request from a terminal installed in a vehicle;

receiving a ultra wideband impulse response signal from the terminal installed in the vehicle;

computing location information and speed information, which will be referred to as traffic information, based on time by using the ultra wideband impulse response signal; and

managing the traffic information in a database so that the traffic information can be applied to traffic-related systems.

10. The method as recited in claim 9, wherein power of a transmitting signal is adjusted by measuring the intensity of a signal transmitted from the primary wireless communication means to minimize interference on adjacent systems in the step of transmitting the ultra wideband impulse response signal of the terminal installed in the vehicle.

11. The method as recited in claim 9, further comprising the step of:

releasing the assigned channels upon receipt of a channel release request transmitted from the primary wireless communication means to the terminal installed in the vehicle.

12. A method for controlling traffic lights using traffic information, comprising the steps of:

assigning channels upon receipt of a channel assignment request from a terminal installed in a vehicle;

receiving a ultra wideband impulse response signal from the terminal installed in the vehicle;

computing location information and speed information, which will be referred to as traffic information, based on time by using the ultra wideband impulse response signal; and

controlling traffic lights by using the traffic information.

13. The method as recited in claim 12, wherein the traffic information is managed in a database so that the traffic information can be applied to traffic-related systems.