Road traffic information transmitter, transmitting method, transmitting program, and road traffic information receiver, receiving method, and reception program

• US 20030182051A1
• Filed: 03/19/2003
• Published: 09/25/2003
• Est. Priority Date: 03/20/2002
• Status: Abandoned Application

• Current Assignee: Vehicle Information And Communication System Center
• Original Assignee: Vehicle Information And Communication System Center
• Inventors: Yamamoto, Tetsuo
• Application Number:
  US10/392,136
• Publication Number:
  US 20030182051A1
• Time in Patent Office: Days
• US Class Current: 701/200
• CPC Class Codes: G08G 1/01 Detecting movement of traffic to be counted or controlled G08G1/07 - G08G1/14 take precedence
• CPC Class Codes: G08G 1/0967 Systems involving transmission of highway information, e.g. weather, speed limits transmission of navigation instructions to the vehicle G08G1/0968

Abstract

A road information transmitter, its method, its program and a road information receiver, its method, its program capable of reducing the data-transmission amount of road information are provided, wherein it is not necessary to have the newest database corresponding to the VICS link. The road information receiver 5 to receive the road information transmitter 3 for transmitting the road information containing traffic data showing location data for showing the position of a road, and traffic data for showing traffic condition of the road, wherein the road information transmitter 3 includes traffic data collection part 7, element coordinates records department 9, encoding part 11, modulation part 13, and transmitter 15, wherein the road information receiver 5 includes receiving part 17, demodulation part 19, decoding part 21, map coordinates data records department 23, road specification processing part 25, and traffic data-processing part 27.

Claims

1. A road information transmitter for transmitting road information which contains location data showing the position of a road, including:

an element coordinates record part where element coordinates for indicating the position of a road by at least two coordinates of origin and destination of the map coordinates data for indicating a position by coordinates, are recorded as the location data;

an encoding part that encodes the element coordinates recorded in the element coordinates record part to generate code coordinates;

a modulation part that modulates the code coordinates encoded by the encoding part to generate a modulation signal; and

a transmitting part that transmits the modulation signal modulated by the modulation part, as the road information.

7. A road information receiver to receive the modulation signal transmitted from the road information transmitter as described in claim 1 as the road information, so as to indicate the position of the road, which includes

a receiving part that receives the modulation signal;

a demodulation part that collects the code coordinates included in the modulation signal by demodulating the modulation signal received by this receiving part;

a decoded coordinates generation part that generates the decoded coordinates by decoding the code coordinates obtained by the decoding part;

a map coordinates data record part where the map coordinates data for indicating a position by coordinates is recorded; and

a road specification processing part that generates reproduction coordinates which indicate the position of a road based on the map coordinates data recorded in this map coordinates data record part, and decoded coordinates generated by the decoded coordinates generation part.

2. A road information transmitter for transmitting road information which contains location data showing the position of a road, and traffic data showing a traffic condition of the road, including:

a traffic data collecting part that collects traffic data;

an element coordinates record part where element coordinates for indicating the position of a road are recorded as the location data by at least two coordinates of origin and destination of map coordinates data for indicating the position by coordinates as the location data;

an encoding part that generates code coordinates obtained by encoding the element coordinates and traffic data code obtained by encoding the traffic data, wherein the element coordinates recorded in the element coordinates record part and the traffic data are correlated;

a modulation part that modulates the code coordinates and the traffic data code encoded by the encoding part to generate a modulation signal; and

a transmitting part that transmits the modulation signal modulated by the modulation part, as the road information.

8. A road information receiver to output the processing information processed based on the traffic data included in the road information, while receiving the road information transmitted from the road information transmitter as described in claim 2, and indicating the position of a road, which includes

a receiving part that receives the modulation signal;

a modulation part that collects the code coordinates and the traffic data code included in the modulation signal by demodulating the modulation signal received by this receiving part;

a decoded coordinates generation part that generates the traffic data by decoding the decoded coordinates and the traffic data code by decoding the code coordinates obtained by the demodulation part;

a map coordinates data record part where the map coordinates data for indicating a position by coordinates is decoded;

a road specification processing part to generate the reproduction coordinates which indicate the position of a road based on the map coordinates data recorded in the map coordinates data record part, and the decoded coordinates generated by the decoded coordinates generation part; and

a traffic data-processing part to output the processing information processed at least either of the processing of route selection processing to choose the route which serves as the shortest time based on the position and the traffic data of the road indicated by this road specification processing part when moving on the road, and the display processing which enables the display of the traffic condition of the road on the display part.

3. A road information transmitting method for transmitting road information, which contains location data showing the position of a road, including the steps of:

encoding element coordinates for indicating the position of a road by at least two coordinates of origin and destination of map coordinates data for indicating a position by coordinates, wherein the element coordinates are read out from a record part in which the element coordinates have been recorded beforehand as the location data;

modulating the code coordinates encoded in the encoding step to generate a modulation signal; and

transmitting the modulation signal modulated in the modulation step, as the road information.

9. A road information receiving method for receiving the modulation signal transmitted using the road information transmitting method as described in claim 3 as a road information so as to indicate the position of the road, including the steps of:

receiving the modulation signal;

obtaining the code coordinates included in the modulation signal by demodulating the modulation signal received at the receiving step;

generating the decoded coordinates by decoding the code coordinates obtained at the decoding step; and

generating reproduction coordinates which indicate the position of a road based on the map coordinates data which has been recorded in the record part beforehand, and which indicates a position by coordinates and the decoded coordinates generated at the decoded coordinates generation step, to specify the road.

4. A road information transmitting method for transmitting road information that contains location data showing the position of a road, and a traffic data showing the traffic condition of the road, including the steps of:

collecting traffic data from a detection part provided on the road;

encoding element coordinates for indicating the position of a road by at least two coordinates of origin and destination of map coordinates data for indicating a position by coordinates, and the traffic data to generate code coordinates obtained by encoding the elements coordinates and the traffic data code obtained by encoding the traffic data, wherein the element coordinates are read out from a record part in which the elements coordinates have been recorded beforehand as the location data, and wherein the element coordinates and the traffic data are correlated; and

modulating the code coordinates and the traffic data code encoded at the coding step.

10. A road information receiving method to output the processing information processed based on the traffic data included in the road information, while receiving the road information transmitted using the road information transmitting method as described in claim 4, including:

a receiving part for receiving the modulation signal;

a demodulation part for demodulating the modulation signal received at the receiving part to obtain the code coordinates included in the modulation signal, and traffic data;

a decoded coordinates generation part for generating decoded coordinates obtained by decoding the code coordinates collected by the demodulation step, and traffic data obtained by decoding traffic data code; and

a road specification processing part for generating reproduction coordinates which indicate the position of a road based on the map coordinates data which is recorded in the record part beforehand, and the decoded coordinates generated by the decoded coordinates generation part, to indicate a position by coordinates; and

a traffic data-processing part for outputting the processing information processed at least either of the route selection processing for choosing the route which serves as the shortest time based on the position and the traffic data of the road indicated by the road specification processing part when moving on the road, and the display processing which enables the display of the traffic condition of the road on a display.

5. A road information transmitting program, functionally equipped with:

an encoding part that encodes the element coordinates recorded in the element coordinates record part to generate code coordinates, wherein the element coordinates are read out from a record part in which the elements coordinates have been recorded beforehand as the location data;

a modulation part that encodes the element coordinates recorded in the element coordinates record part to generate code coordinates; and

a transmitting part that transmits the modulation signal modulated by the modulation part, as the road information.

6. A road information transmitting program, functionally equipped with a part for transmitting the road information containing the location data showing the position of a road and a traffic data showing the traffic condition of the road, wherein

a traffic data collecting part that collects traffic data from the detection part provided on the road;

an encoding part that encodes the element coordinates recorded in the element coordinates record part to generate code coordinates, wherein the element coordinates are read out from a record part in which the elements coordinates have been recorded beforehand as the location data, and wherein the element coordinates and the traffic data are correlated;

a modulation part that modulates the code coordinates and the traffic data code encoded by the encoding part to generate a modulation signal; and

a transmitting part that transmits the modulation signal modulated by the modulation part, as the road information, are included.

12. A road information reception program, functionally equipped with a part for outputting the processing information processed based on the traffic data contained in the road information, while receiving the road information transmitted by the road information transmitting program as described in claim 6 functioning, and indicating the position of the road, which includes:

a receiving part that receives the modulation signal;

a demodulation part that demodulates the modulation signal to obtain the code coordinates included in the modulation signal received at this receiving part and the traffic data code;

a decoded coordinates generation part that generates the traffic data which decoded the decoded coordinates and the traffic data code which decoded the code coordinates obtained by the demodulation part;

a road specification processing part that generates the reproduction coordinates which indicate the position of a road based on the map coordinates data which is recorded in record part beforehand, and which indicates a position of a road by coordinates, and the decoded coordinates generated by the decoded coordinates generation part; and

a traffic data-processing part for outputting the processing information processed at least either of the route selection processing for choosing the route which serves as the shortest time based on the position and the traffic data of the road indicated by the road specification processing part when moving on the road, and the display processing which enables the display of the traffic condition of the road on a display.

11. A road information reception program, functionally equipped with a part where the modulation signal transmitted as road information is received, and the position of a road is indicated, which includes:

a receiving part that receives the modulation signal;

a demodulation part that demodulates the modulation signal to obtain the code coordinates included in the modulation signal received at this receiving part;

a decoded coordinates generation part that generates the decoded coordinates which decoded the code coordinates obtained by the demodulation part;

a road specification processing part for generating reproduction coordinates which indicate the position of a road based on the map coordinates data which has been recorded in a record part beforehand, and reproduction coordinates generated in the decoded coordinates generating part for indicating the position of a road.