JP2005165388A - Traveling information communication method in road traffic information management system and on-vehicle navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that enhancements of radio communication lines and processing capacity of a traffic information management center are required to cope with the increase of communication traffic from vehicles to the traffic information management center mainly at the time of traffic jams, thereby bringing about the increase of facility costs. <P>SOLUTION: In a traveling information communication method of an on-vehicle car navigation device, a vehicle has a means which computes its own average traveling speed, and radio communication from a vehicle to the traffic information management center is conducted only when a traffic jam begins and the average speed of the vehicle decreases to a preliminarily fixed threshold value or below and only when the traffic jam ends and the average speed of the vehicle increases to a preliminarily fixed threshold value or above. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a road traffic information system, and in particular, road traffic information for coping with an increase in vehicles without increasing the equipment of the road traffic information system associated with the increase in the number of vehicles using the average traveling speed of the vehicles. It is about the system.

  The road traffic information system represented by VICS encourages the driver to select an appropriate route by editing and processing road traffic information such as traffic congestion and traffic regulations collected at the system center and sending it to the vehicle in real time. This system increases safety and smoothness. In recent years, in order to cope with an increasing traffic volume, a road traffic information system with higher accuracy has been demanded and has been developed into a system using travel data of each vehicle.

  A vehicle equipped with a car navigation device with a wireless communication function transmits driving information such as a driving point and a speed together with a vehicle ID to a traffic information management center that manages traffic conditions in real time. The traffic information management center It collects information from running vehicles, grasps traffic conditions and other road conditions, and distributes traffic information such as traffic conditions as traffic information.

For example, in the example of Patent Document 1, each vehicle traveling on a road transmits information indicating a traveling state to the traffic information management center under the following conditions.
• When the speed change is above a certain level and the vehicle is running at a stable speed longer than the specified time after the speed changes.
・ When a predetermined time has elapsed since the last travel status was sent.
・ When the vehicle speed instantaneously reaches 0 km / h.

Further, in Patent Document 2, as the determination of the traffic jam of the vehicle, the duration of the braking interval of the driver or the duration of the vehicle speed below a predetermined speed is monitored, the traffic jam is judged, and the traffic information is sent to the traffic information management center. Is disclosed.
JP 2002-269692 A JP-A-5-18773

  As the number of vehicles increases, the traffic transmitted from the vehicles to the traffic information management center increases. In particular, in traffic jams, traffic from vehicles to the traffic information management center is concentrated, and in the worst case, a line congestion state may occur. As a countermeasure, it is conceivable to increase the number of wireless lines, but the cost increases in proportion to the number of additional lines, and the data transmitted to the traffic information management center also increases. In addition, it is necessary to strengthen the processing facilities.

  The problem to be solved is that in response to the increase in wireless communication traffic from vehicles that increases in traffic jams, etc., it becomes necessary to reinforce the wireless communication line and strengthen the processing capacity of the traffic information management center, increasing the equipment cost Is to invite.

  In a traffic information management system, a first aspect of the present invention is a traffic information management system in which a vehicle in a congested state collects the traffic state of a road from the car navigation device with a wireless communication function of the own vehicle and distributes the road state as traffic information. This is a method of transmitting vehicle travel information to the center.

  The car navigation device with a wireless communication function includes a means for calculating a current position of the vehicle, a means for calculating an average traveling speed of the vehicle from the traveling speed of the vehicle, the current position, and a traffic jam start for determining that the vehicle has entered a traffic jam It is determined whether the vehicle is in a traffic jam state from the threshold, a means for holding a traffic jam end threshold for judging that the vehicle has exited from the traffic jam, the average travel speed of the vehicle, the traffic jam start threshold, and the traffic jam end threshold. Means, means for transmitting vehicle travel information to the traffic information management center, and means for receiving traffic information from the traffic information management center.

  The vehicle-mounted car navigation device with a wireless communication function has at least the current position of the vehicle at the time when the average traveling speed of the vehicle is lower than the traffic jam start threshold and the first time when the vehicle traffic exceeds the traffic jam end threshold. The average traveling speed is transmitted to the traffic information management center.

  The second invention is an in-vehicle car navigation device with a wireless communication function having the function of the first invention.

  A vehicle-mounted car navigation device with a wireless communication function includes: means for calculating a current position of a vehicle; means for calculating an average travel speed of a vehicle from a travel speed of the vehicle; and the current position and the average travel speed of the vehicle are congested. Means for holding a traffic jam start threshold for determining that the vehicle has entered and a traffic jam end threshold for determining that the average travel speed of the vehicle has exited the traffic jam, the average travel speed of the vehicle, the traffic jam start threshold, and the traffic jam Means for determining whether or not the vehicle is in a traffic jam state from an end threshold value. Further, when the average travel speed of the vehicle falls below the traffic jam start threshold or exceeds the traffic jam end threshold, at least the current position of the vehicle and the average travel speed are set to the traffic information management center. And means for receiving traffic information from the traffic information center.

  According to a third aspect, in the first aspect, the transmission of the travel information to the traffic information management center is performed at least when the average travel speed of the vehicle is below a traffic jam threshold, at least the current position and The average traveling speed is transmitted to the traffic information management center.

  In the road traffic information system of the present invention, the situation data is transmitted from the vehicle encountering the traffic jam to the traffic information management center when the traffic jam starts, the average speed of the vehicle is reduced, and is below a specific threshold value. Because it is eliminated from traffic jams, the average speed of the vehicle is increased, and it becomes the minimum necessary only when it exceeds a specific threshold, so the wireless communication traffic does not increase more than necessary. Accordingly, there is an advantage that appropriate traffic information can be provided to each vehicle without increasing the radio communication line or strengthening the calculation processing capability of the traffic information management center.

    FIG. 1 is a diagram showing a high-precision road traffic information system for reducing communication traffic. Each vehicle shown in the figure such as the vehicle A, the vehicle 1, the vehicle i, the vehicle B, and the like is a vehicle equipped with a car navigation device with a wireless communication function (hereinafter referred to as a vehicle when referring to the vehicle in general). A radio base station 1 that performs radio communication with a car navigation device with a radio communication function of a vehicle, a traffic information management center 2 that collects, edits and processes traffic information of each road such as traffic congestion and traffic regulation, and distributes traffic information, A wide-area wireless distribution device 3 that distributes data from the traffic information management center 2 and a GPS artificial satellite 4 are connected via a communication network 5. The bold lines indicate individual roads. In addition, vehicle A indicates that the vehicle is at a traffic jam start point, vehicle B indicates that the vehicle is at a traffic jam end point, and vehicle 1 and vehicle i indicate that the vehicle is in a traffic jam position.

  The vehicle speed is reduced to a predetermined speed or less, the traffic congestion start point is immediately before entering a traffic jam, the vehicle speed is increased to a predetermined speed or more, and the traffic exit point is expressed as a traffic jam end point.

  Although details will be described later, the travel information, traffic information, and congestion threshold information will be briefly described. The traveling information is information indicating the traveling state of the vehicle traveling on the road, and is composed of the vehicle ID, the current position of the traveling vehicle, the traveling locus, and the average speed of the vehicle. Traffic information is information that shows the traffic situation of each road delivered from the traffic information management center, and passes through the traffic jam start point (latitude, longitude), traffic jam end point (latitude, longitude), and traffic jam section. Consists of the time required. The traffic congestion threshold information is an average speed of a vehicle that determines whether or not there is traffic congestion, and is set by an individual vehicle or a traffic management center, and includes a traffic congestion start speed threshold and a traffic congestion end speed threshold. The traffic jam start speed threshold is the average speed of vehicles that are judged to have entered the traffic jam section, and the traffic jam end speed threshold is the average speed of vehicles that are judged to have exited the traffic jam section.

  FIG. 2 is a diagram showing a configuration of a car navigation device with a wireless communication function according to an embodiment of the present invention. The radio base station 1, the traffic information management center 2, and the wide area radio distribution apparatus 3 shown in FIG. 1 are also shown.

  The car navigation device 10 with a wireless communication function includes a wireless antenna 11 that communicates with the wireless base station 1 and the wide-area wireless distribution device 3, transmission of vehicle travel information via the wireless antenna 11, or traffic from the traffic information management center 2. A wireless transmission / reception unit 12 for receiving information, a transmission / reception control for wireless communication, a wireless control unit 13 for controlling the flow of travel information, traffic information, and threshold information, a GPS antenna 14 for receiving radio waves from GPS, and a GPS reception unit 15 , A vehicle speed sensor 16 for detecting the speed of the vehicle, a vehicle speed calculation unit 17 for calculating the vehicle speed / average speed, a gyro sensor 18 for calculating the detailed position from the traveling direction and acceleration of the vehicle, and calculating and managing vehicle travel information. The travel information calculation unit 19, the threshold determination unit 20 that determines whether the traffic starts from the average speed, the traffic jam is in progress, or the traffic jam ends Storage unit 21, memory 22 for holding travel information and traffic information from the traffic management center, map DB unit 23 for holding car navigation map information, map, traffic congestion on road, and position of vehicle on road An image control unit 24 that controls an image to be displayed on the screen, and an image display unit 25 that displays an image under the control of the image control unit 24 are provided.

  The travel information calculation unit 19 calculates the position of the host vehicle based on information from both the GPS reception unit 15 and the gyro sensor 18, and combines the travel speed of the host vehicle from the vehicle speed calculation unit 17 to determine the travel state of the host vehicle. Information to be stored is stored in the memory 22. The threshold determination unit 20 determines whether or not the host vehicle is in a traffic jam state by comparing the average speed of the host vehicle sent from the vehicle speed calculation unit 17 and the threshold information stored in the threshold storage unit 21. When it is determined that the traffic jam starts and the traffic jam ends, the threshold value determination unit 20 instructs the travel information calculation unit 19 to transmit the travel information to the radio control unit 13 and transmits the travel information to the radio control unit 13 as well. The transmission / reception unit 12 instructs transmission to the traffic information management center 2 via the base station 1.

  The wireless control unit 13 extracts traffic information and threshold information from information transmitted from the traffic information management center 2 via the wide area wireless distribution device 3, and stores the threshold information in the threshold storage unit. Traffic information is stored in memory.

  The image control unit 24 reads map information around the position of the own vehicle from the map DB unit 23 based on the traveling information of the own vehicle sent from the traveling information calculation unit 19. Further, the traffic information stored in the memory 22 is read out and displayed on the image display unit 25 so as to be superimposed on the map information read from the map DB unit 23.

  FIG. 3 is a diagram showing the configuration of the traffic information management center according to the embodiment of the present invention. “1”, “i”, “j”, and “m” in FIG. 3 indicate a car navigation device with a wireless communication function of the vehicle, and the wireless base stations 1-1, 1-1, 1- n, the traffic information management center 2, and the wide area radio | wireless delivery apparatus 3 are shown collectively. The traffic information management center 2 includes a travel information receiving unit 31 that interfaces with the radio base station 1-i and receives the travel information, and a traffic information transmission unit 32 that interfaces with the wide area wireless distribution device 3 and transmits the traffic information. The travel information receiving unit 31 and the traffic information transmitting unit 32 are interfaces with wireless devices. The traffic information of each road is determined and calculated based on the information in the traffic jam information DB 33 and the traffic jam information DB 33 for storing information indicating the traffic jam occurrence location and the situation of each road from the travel information received by the travel information receiving unit 31. The traffic information calculation unit 34 and the traffic information DB 33 are provided with a threshold setting unit 35 that determines traffic on an individual road from the information and sets a vehicle speed threshold for whether or not there is traffic. The traffic state of each road calculated by the traffic information calculation unit 34 is stored in the traffic jam information DB 33 as traffic information. The traffic jam information DB unit 33 reads the traffic information held inside and transmits it to the traffic information transmission unit 32. The threshold setting unit 35 transmits threshold information to the traffic information transmitting unit 32 and stores it in the traffic jam information DB 33 when there is a traffic congestion determination threshold set by an administrator or the like.

  Next, a description will be given of judgment of traffic congestion based on travel information from vehicles in the traffic information management center, calculation of traffic information, and distribution to vehicles.

  FIG. 4 is a diagram showing travel information from the vehicle according to the embodiment of the present invention. Consists of traffic jam start information and traffic jam end information. The traffic jam start information is transmitted when it is determined that a traffic jam section has been entered. It is composed of a vehicle ID, a traffic jam start point (latitude, longitude) indicating the current position of the vehicle when it is determined that traffic jam starts, an average speed of the vehicle at that time, and a travel locus of the vehicle. The vehicle trajectory is limited to the traffic jam start point.

  The traffic jam end information is transmitted when it is determined that the traffic jam section has been exited. Consists of a vehicle ID, a traffic jam end point (latitude and longitude) indicating the current position of the vehicle when it is determined that the traffic jam has ended, an average speed of the vehicle at that time, and a vehicle travel locus. The travel locus of the vehicle is a route from the start point of the traffic jam to the end point of the traffic jam, and is a position of the vehicle at a point where the vehicle travels regularly, for example, every 1 second. The vehicle position information is stored in the memory 22. Note that the remarks column in FIG. 4 is shown for convenience of explanation of the contents of the invention, and is not necessary in actual implementation of the invention.

  The traffic information management center's traffic jam information DB comprises a traffic jam start information DB, a traffic jam end DB, a traffic information DB, and a threshold information DB. FIG. 5, FIG. 6, FIG. 7, and FIG. 8 show the contents of each. The traffic jam start information DB and the traffic jam end information DB are a collection of traffic jam start information and traffic jam end information transmitted from vehicles traveling on the road, and are information combined with the time when the information was received at the traffic information management center. Constitute.

  FIG. 5 is a diagram showing the traffic jam start information DB of the traffic information management center of the traffic information management center according to the embodiment of the present invention. It consists of information reception time, average speed, traffic jam start point, travel locus, and vehicle ID.

  FIG. 6 is a diagram showing the traffic jam end information DB of the traffic information management center of the traffic information management center according to the embodiment of the present invention. Similar to the traffic jam start information DB, the information reception time, average speed, traffic jam end point, travel locus, and vehicle ID are included.

  FIG. 7 is a diagram showing the traffic information DB of the traffic jam information DB of the traffic information management center according to the embodiment of the present invention. The contents of the traffic information DB are information obtained by analyzing the traffic situation for each traffic jam section from the data of the traffic jam start DB section and the traffic jam end DB section calculated by the traffic information calculation section. It is composed of an end point, a plurality of travel trajectories in a traffic jam section (each travel route when there are a plurality of travel routes in the traffic jam section), and a transit time required to pass through the traffic jam section. This traffic information corresponds to traffic information transmitted through the wide area wireless distribution device.

  FIG. 8 is a diagram showing the threshold information DB of the traffic jam information DB of the traffic information management center according to the embodiment of the present invention. The threshold information DB includes date and time, a traffic jam start threshold for each traffic jam section, a traffic jam end threshold, a traffic jam start point, and a traffic jam end point. These numerical values are set, for example, by the traffic information management center manager or the like based on the traffic congestion on each road. The remarks column in FIGS. 5, 6, 7 and 8 is shown for convenience of explanation of the invention contents to be described later, and is not necessary in actual implementation of the invention.

FIG. 9 is a diagram showing a travel information transmission process flow of one embodiment of the present invention.
S0: Start transmission of travel information. The traffic jam start information and the traffic jam end information are not transmitted. Once the traffic jam start information is transmitted and the traffic jam end information is transmitted after exiting the traffic jam, this state is established.
S1: It is confirmed whether or not the traffic jam start information has been transmitted. If it has been transmitted, the process proceeds to S8, and if it has not been transmitted, the process proceeds to S2.
S2: The vehicle speed calculation unit calculates the average vehicle speed of the host vehicle.
S3: Whether or not the vehicle is in a traffic jam state is compared with the traffic jam start speed threshold value from the threshold storage unit and the average vehicle speed calculated in S2.
S4: When the average vehicle speed is equal to or less than the traffic jam start threshold, the process proceeds to S5, and when it is above, the process returns to S2.
S5: Instructing transmission of traffic jam start information from the threshold determination unit to the radio control unit.
S6: The traffic jam start information in the memory is read from the radio control unit and sent to the radio transmission / reception unit.
S7: Congestion start information is transmitted from the wireless transmission / reception unit to the wireless base station.
S8: The vehicle speed calculation unit calculates the average vehicle speed of the host vehicle.
S9: Whether the vehicle is in a traffic jam state is compared with the traffic jam start threshold value from the threshold storage unit and the average vehicle speed calculated in S8.
S10: When the average vehicle speed is equal to or higher than the congestion end speed threshold, the process proceeds to S11, and when it is below, the process returns to S8.
S11: Instructing transmission of traffic jam end information from the threshold determination unit to the radio control unit.
S12: Congestion end information in the memory is read from the wireless control unit and sent to the wireless transmission / reception unit.
S13: Congestion end information is transmitted from the wireless transmission / reception unit to the wireless base station.
S14: The position of the own vehicle is calculated periodically (for example, at intervals of 1 second) from information from the GPS receiver and the gyro sensor.
S15: The position of the vehicle calculated in S14 is stored in the memory, and the next calculation is performed (return to S14).

  FIG. 10 is a diagram showing the timing of traveling information transmission according to an embodiment of the present invention. It is transmitted based on the travel information transmission process flow from the vehicle shown in FIG. In FIG. 10, the traffic jam start speed threshold is [10 km / h] and the traffic jam end speed threshold is [20 km / h]. During the period from time a to c, the average speed is equal to or greater than the traffic jam start speed threshold [10 km / h], so the travel information for traffic jam start is not transmitted. When the vehicle speed falls below [10 km / h] at time d, the traffic jam start point, average speed, and travel trajectory are transmitted to the traffic information management center as traffic jam start travel information together with the vehicle ID. During the time e to j, the average speed is equal to or less than the traffic jam end speed threshold [20 km / h], and since the traffic is still jammed, the traveling information is not transmitted. By exceeding [20 km / h] at time k, the traffic jam end point, average speed, and travel trajectory are transmitted to the traffic information management center as vehicle traffic end travel information together with the vehicle ID. In addition, after time l, the traffic jam ends, and traveling information is not transmitted. D, f, h, i, j, and k in the remarks column of the traffic jam start information in FIG. 4 represent the travel position of the vehicle at the time corresponding to each character in FIG.

  FIG. 11 shows traffic information distributed by the traffic information management center according to the embodiment of the present invention. The traffic information management center distributes regularly (for example, every minute). It is traffic information at that time, and is composed of a traffic jam start point including a travel route for each traffic jam section, a traffic jam end point, a transit time required to pass through the traffic jam section, and a travel trajectory.

FIG. 12 is a diagram showing a traffic information reception process flow of one embodiment of the present invention.
S20: Start receiving traffic information.
S21: The wireless transmission / reception unit receives information from the wide area wireless distribution device.
S22: The received information is separated into traffic information and congestion threshold information.
S23: If the traffic congestion threshold information is transmitted from the traffic information management center, the process proceeds to S24, and if not transmitted, the process proceeds to S25.
S24: After replacing the threshold setting value of the threshold storage unit with the received threshold value, the process proceeds to S25.
S25: The received traffic information is stored in the memory according to an instruction from the radio control unit.
S26: The image control unit reads map information corresponding to the position of the vehicle from the map information DB.
S27: The traffic information stored in the memory is read out by the image control unit.
S28: The image control unit displays an image in which the traffic information is superimposed on the map information on the image display unit.

  FIG. 13 is a diagram showing a traffic jam section calculation procedure according to an embodiment of the present invention. FIG. 14 is a diagram showing a traffic jam section calculation example (part 1) according to an embodiment of the present invention, and illustrates the procedure of FIG.

S30: From the collected travel information from each vehicle, travel information that can be considered that the traffic jam end point is within a predetermined range is extracted from the traffic jam end information as the same traffic jam end point.
S31: The travel information determined that the traffic jam start point is within the predetermined range in the same traffic jam end point data is grouped as the same traffic jam start point group.

Through S31 and S32, traffic jam information is collected so that the traffic jam start point and the traffic jam end point can be regarded as the same.
S32: Check whether or not there are a plurality of travel routes between the points in the grouped data, and if there are a plurality of routes, extract the grouped traffic jam end information for each travel locus and divide it into fine groups. . Thereby, the data of the traffic jam start point and the traffic jam end point for each traffic jam section can be collected.
S33: The data of the traffic jam start point of other traffic jam start information that can be regarded as the traffic jam start point is added to the data of the traffic jam traffic start point that has been grouped. This is the travel information of the vehicle that transmitted the traffic jam start information. That is, after transmitting the traffic jam start information, the traffic jam start point of the vehicle that has entered the traffic jam and has not yet transmitted the traffic jam end information is added. Thereby, the data of the traffic jam start point and traffic jam end point for every traffic jam section can be collected.
S34: The average traffic start point and the average traffic end point are calculated for each traffic jam section. First, the average traffic occurrence point is calculated as a simple average. This is an average value of all collected data, and is a temporary traffic jam start point P. This is because the running pattern of each vehicle is not uniform, and there is a difference in the timing of braking, so even if the same traffic jam start threshold is used, the vehicle will vary at the traffic jam start point. is there.
S35: Next, an average value excluding data of a traffic jam start point that is a predetermined distance or more away from the calculated temporary traffic jam start point P is calculated and set as Q. This point Q is a traffic jam start point.
S36: Similarly, the average traffic jam end point S is calculated by excluding the simple average temporary traffic jam end point R and the data separated by a certain distance or more from all data.
S37: The transit time required to pass through the traffic jam section for each travel route is calculated from the data of the travel trajectory in the traffic jam end information. The passing time of the traffic jam section for each vehicle is calculated from the difference between the traffic jam start time and the traffic jam end time for each vehicle in the same travel route group. These simple averages are calculated, and a temporary average transit time is calculated. The average time is calculated again from the data within a certain period before and after the provisional average passage time, and the passage time for each travel route is determined. This is to eliminate irregular data (long-time parking etc) other than the vehicle that has passed through the traffic jam section. As a result, it is possible to calculate the degree of traffic jam for each travel route, for example, a travel route with less traffic jam.

FIG. 15 is a diagram illustrating a traffic jam section calculation example (2) according to an embodiment of the present invention. Here, as a traffic jam section, as shown in FIG. 15, there are a plurality of intersections between a traffic jam start point and a traffic jam end point, and the procedure described in FIG. 13 will be described. Here, there are three travel routes from point A to point I, route 1, route 2, and route 3, and further, there is a case where there is a point I from point J as a traffic jam section. The remarks column in FIG. 5 and FIG. 6 shows an example of this case and will be described along each step shown in FIG.
1) Extract a traffic jam end point where the traffic jam end point can be regarded as a point I from the traffic information DB. In this case, (1) to (5) in the remarks column of FIG. (S30, S31)
2) In this group I, traffic jam start information in which the traffic jam start point can be regarded as a point A is collected as group A. In the example of FIG. 6, (1), (2), (4), and (5) are groups of traffic jam sections AI, and (3) is another group of traffic jam sections JI. (S32)
3) A traffic jam start point that can be regarded as a point A is extracted from the traffic jam start information DB in the traffic jam section AI group, and is added to the traffic jam start point of the traffic jam section group AI. In the example of FIG. 5, the information of (1) in the remarks column is added. (S33)
4) The traffic jam start point and traffic jam end point of the traffic jam section group AI are calculated. (S33, S34, S35)
5) Divide the traffic jam section AI group for each travel route. In the example of FIG. 6, (1) in the remarks column indicates the travel route 1, (2), (5) indicates the travel route 2, and (4) indicates the travel route 3. The transit time of the traffic jam section AI for each of the travel route 1, the travel route 2, and the travel route 3 is determined. (S37)
FIG. 16 is a diagram showing traffic information display on the car navigation screen according to the embodiment of the present invention. The received traffic information is displayed on the image display unit of the car navigation device with a wireless communication function. Since the traffic information transmitted from the traffic information management center knows the traffic jam start point and the traffic jam resolution point, and identifies the traffic jam section, this section is displayed as a traffic jam occurrence section on the map information. In addition, it performs a difference check with the traffic information stored in the memory of the car navigation device in advance, and if it is a traffic jam location not included in the traffic information accumulated, it is displayed as a new traffic jam occurrence location, A portion where there is no accumulated traffic information in the received traffic information is displayed as a traffic jam resolution location.

It is a figure which shows the high precision road traffic information system which reduces communication traffic. It is a figure which shows the structure of the car navigation apparatus with a wireless communication function of one Embodiment of this invention. It is a figure which shows the structure of the traffic information management center of one Embodiment of this invention. It is a figure which shows the driving information from the vehicle of one Embodiment of this invention. It is a figure which shows traffic jam start information DB of traffic information management center of the traffic information management center of one Embodiment of this invention. It is a figure which shows the traffic end information DB of the traffic information management center of the traffic information management center of one Embodiment of this invention. It is a figure which shows traffic information DB of traffic information management center of the traffic information management center of one Embodiment of this invention. It is a figure which shows threshold value information DB of traffic information DB of the traffic information management center of one Embodiment of this invention. It is a figure which shows the driving | running | working information transmission flow of one Embodiment of this invention. It is a figure which shows the timing of the driving information transmission of one Embodiment of this invention. It is a figure which shows the traffic information delivered from the traffic information management center of one Embodiment of this invention. It is a figure which shows the traffic information reception process flow of one Embodiment of this invention. It is a figure which shows the congestion area calculation procedure of one Embodiment of this invention. It is a figure which shows the traffic area calculation example (the 1) of one Embodiment of this invention. It is a figure which shows the traffic area calculation example (the 2) of one Embodiment of this invention. It is a figure which shows the traffic information display on the car navigation screen of one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radio base station 1-i radio base station 2 Traffic information management center 3 Wide area radio | wireless delivery apparatus 4 Artificial satellite 5 Communication network 10 Car navigation apparatus with a radio | wireless communication function 11 Radio antenna 12 Radio transmission / reception part 13 Radio control part 14 GPS antenna 15 GPS Reception unit 16 Vehicle speed sensor 17 Vehicle speed calculation unit 18 Gyro sensor 19 Travel information calculation unit 20 Threshold determination unit 21 Threshold storage unit 22 Memory 23 Map DB unit 24 Image control unit 25 Image display unit 31 Travel information reception unit 32 Information traffic transmission Unit 33 Traffic jam information DB unit 34 Traffic information calculation unit 35 Threshold specification unit “i” Car navigation (car navigation device with wireless communication function)

Claims (3)

Means for calculating the current position of the vehicle, means for calculating the average travel speed of the vehicle from the travel speed of the vehicle, the traffic position threshold for determining that the current position and the average travel speed of the vehicle have entered the traffic jam, and
Means for holding a traffic jam end threshold for determining that the average traveling speed of the vehicle has exited the traffic jam;
Means for determining whether the vehicle is in a traffic jam state from the average running speed of the vehicle, the traffic jam start threshold, and the traffic jam end threshold;
Means for collecting vehicle travel speed and current position travel information as traffic information management center that collects traffic conditions of information roads and distributing road conditions as traffic information; and traffic from the traffic information management center A method of transmitting the travel information of a vehicle from an in-vehicle car navigation device with a wireless communication function having means for receiving information to the traffic information management center,
The vehicle-mounted car navigation device with a wireless communication function, the time when the average traveling speed of the vehicle is below the congestion start threshold, and
Only at the first point above the congestion end threshold,
At least the current position of the vehicle and the average traveling speed are transmitted to the traffic information management center. Means for calculating the current position of the vehicle, means for calculating the average travel speed of the vehicle from the travel speed of the vehicle, the traffic position threshold for determining that the current position and the average travel speed of the vehicle have entered the traffic jam, and
Means for holding a traffic jam end threshold for determining that the average traveling speed of the vehicle has exited the traffic jam;
Means for determining whether the vehicle is in a traffic jam state from the average running speed of the vehicle, the traffic jam start threshold, and the traffic jam end threshold;
If the average travel speed of the vehicle falls below the traffic jam threshold, or
When the traffic congestion end threshold is exceeded,
Means for transmitting at least the current position of the vehicle and the average travel speed to a traffic information management center;
Means for receiving traffic information from the traffic information center;
The on-vehicle car navigation device with the wireless communication function provided. It is a driving | running | working information transmission method of the vehicle-mounted car navigation apparatus of Claim 1, Comprising: The said vehicle-mounted car navigation apparatus with a radio | wireless communication function is only when the said average driving speed of a vehicle is less than the said traffic jam start threshold value,
At least the current position and the average traveling speed are transmitted to a traffic information management center. A traveling information communication method for an on-vehicle car navigation device with a wireless communication function.

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