JPH06290393A - Traffic information system - Google Patents

Abstract

PURPOSE:To obtain traffic information at the arbitrary time in an arbitrary place. CONSTITUTION:A mobile body 9 always detects the running position based on information from a GPS satellite 7. Meanwhile, a traffic information center 8 gathers and analyzes traffic information and transmits the result along with information indicating a region to which the result must be transmitted. When the position measurement result coincides with information which represents a region transmitted from the traffic information center, the mobile body 9 selects traffic information from the traffic information center 8 and displays it on a display device 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic information system for notifying a mobile body of traffic information using satellites.

[0002]

2. Description of the Related Art A conventional traffic information system notifies a moving body of traffic congestion information collected and analyzed at a traffic information center by a wide area or narrow area radio broadcast or an electronic display board installed on a road. there were.

[0003]

However, in such a conventional apparatus, traffic information such as traffic congestion information is obtained from the traffic information center unless the location where the electronic display board or the transmission antenna for the radio is installed is approached. Can not. Furthermore,
The wide area / narrow area radio broadcasting and the electronic display board have a problem that the notified person of the traffic information cannot know the traffic information related to the target position at any place / at any time.

The present invention has been made in view of such circumstances, and is to obtain traffic information at an arbitrary time at an arbitrary place.

[0005]

In order to solve such a problem, the present invention provides a communication satellite with information including traffic information collected and analyzed and notification position information indicating an area where the traffic information needs to be transmitted. A traffic information center equipped with a traffic information center device for notifying a mobile body via the device and its own position is measured using a positioning signal from a GPS satellite, and the measured position is within the area represented by the notification position information. At this time, it is characterized in that it is constituted by a moving body provided with a selection display device for taking out and displaying traffic information from the traffic information center.

[0006]

The moving body always detects the traveling position based on the information from the GPS satellites. On the other hand, the traffic information center collects and analyzes the traffic information and sends it together with the information indicating the area where the result needs to be communicated. Then, when the mobile body determines that the positioning result is within the information indicating the area transmitted from the traffic information center, it selects and displays the traffic information from the traffic information center.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention, in which the traffic information center 8 and the mobile unit 9 are shown by enlarging and enlarging the internal structures thereof. The traffic information center 8 collects and analyzes traffic conditions such as traffic jams, accident information, etc., which change every moment, and creates traffic information.

The traffic information is intended to be transmitted to the moving body 9, but it is not always necessary to convey it to any moving body, and only to the moving body 9 traveling in the area where the information needs to be obtained. It is enough. For example, it is sufficient to transmit the information about the main line only to the mobile bodies traveling on and around the main line, and it is not necessary to transmit it to the mobile body 9 traveling on a road far away from the main line.

For this reason, the traffic information center 8 transmits to the mobile unit 9 via the communication satellite 6 information including a set of traffic information and position information indicating an area where the traffic information needs to be transmitted.

FIG. 2 is an example of a format of a notification message transmitted from the traffic information center 8. The notification message is composed of a header part and an information part, and the header part indicates position information indicating an area where the traffic information needs to be notified. Store
The information section stores traffic information. In this example, the traffic information field is set to position information 1, 2, ...
This is an example of when it is necessary to inform the area of.

Now, the moving body 9 is moving at an arbitrary position, receives the notification message transmitted via the communication satellite 6, and receives the positioning signal transmitted from the GPS satellite 7 to move the position of the moving body 9. It is assumed that the measurement is always performed.

The notification message is received by the receiving device 3 and stored in the storage device 4. The display device 5 reads the position information of the moving body 9 from the positioning device 2 in real time, searches the header part of the notification message stored in the storage device 4 based on the position information, and the positioning result is sent from the traffic information center 8. If it matches the received position information, it is determined that there is a notification message to be displayed at the current position, and the traffic information of the information section is displayed on the display device 5.

When searching the header portion, not the exact match with the position information read from the positioning device 2, but a search in a preset range, for example, a radius of 1 km.

Also, when the operator inside the mobile unit 9 manually inputs arbitrary position information instead of the actual position of the mobile unit 9 whose position information is obtained from the positioning device 2, the same search as described above is performed,
Display traffic information. In this way, it is possible to immediately obtain information on any time at any place.

[0015]

As described above, according to the present invention, the traffic information notified by adding the position information from the traffic information center is stored in the mobile unit, and the current position information of the mobile unit or the manually input arbitrary position information is stored. By constantly searching for, traffic information such as traffic jams and accidents can be known in real time at the required time and position.

Further, since the display position of the traffic information is determined by the position information stored in the header portion of the notification message notified by the traffic information center, there is an effect that the display position can be easily added, deleted or changed. Therefore, there is an effect that it is possible to accurately guide the moving body when a traffic jam occurs.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a header section and an information section.

[Explanation of symbols]

 1 Traffic Information Center Device 2 Positioning Device 3 Receiving Device 4 Storage Device 5 Display Device 6 Communication Satellite 7 GPS Satellite 8 Traffic Information Center 9 Mobile

Claims (1)

[Claims] 1. A traffic information system for notifying traffic information using a communication satellite, wherein notification position information indicating an area where the traffic information needs to be transmitted is added to the collected and analyzed traffic information and the information is communicated. A traffic information center equipped with a traffic information center device for notifying a mobile body via a satellite and its own position is measured using a positioning signal from a GPS satellite, and the measured position is within the area represented by the notified position information. And a moving body equipped with a selection display device for extracting and displaying the traffic information from the traffic information center.