WO1998027530A1

WO1998027530A1 - Process for transmitting route information concerning the recommended route of a vehicle in a road network between a traffic information centre and a terminal mounted in a vehicle, terminal and traffic information centre

Info

Publication number: WO1998027530A1
Application number: PCT/DE1997/002821
Authority: WO
Inventors: Stefan Vieweg
Original assignee: Mannesmann Ag
Priority date: 1996-12-16
Filing date: 1997-11-26
Publication date: 1998-06-25
Also published as: EP0944896A1

Abstract

A terminal, a traffic information centre and a process for transmitting (15) route information (16) concerning a recommended route (1, 5, 6) of a vehicle (13) in a road network (1 to 6) from a traffic information centre (14) to a terminal mounted in a vehicle (13) enable a compact transmission of route information and the supply of high quality route information to the terminal user. The route information (16) concerns orientation points (11, 12) on the route. An orientation point is defined as a place where a vehicle can continue driving in several directions. The information transmitted on each orientation point (11) includes: data (25) defining the location (l11, b11) of the orientation point (11); data (26, w1, w2, w3) on the geometry of the crossing located at the orientation point; transition data (22, 23) defining the route through the orientation point (11).

Description

Method for transmitting route information relating to a recommended route of a vehicle in a traffic network from a traffic control center to a terminal in a vehicle, terminal and control center

- Description

The invention relates to a method for transmitting route information relating to a recommended route of a vehicle in a traffic network from a traffic control center to a terminal in a vehicle, a terminal and a control center.

Navigation systems for creating a route recommendation for the driver of a vehicle can be installed in a terminal with a digital map in the vehicle. This enables a route calculation based on the existing map. If, on the other hand, the digital map is in a traffic control center, the map is continuously updated and thus an optimization of the

Route calculation taking into account new roads in the traffic network, construction site plans, large event plans, diversions, traffic information from stationary and mobile detectors etc. possible, which considerably optimizes the quality of a calculated route. The route information transmitted for this requires considerable communication effort, in particular

Telecommunications costs.

The object of the present invention is an efficient transmission of route information from a traffic control center to a terminal in a vehicle, which allows inexpensive, sufficient and suitable information for a user of the terminal about a recommended route. The object is solved by the subject matter of the independent claims.

The invention enables sufficient and suitable information for a driver about a recommended route. The recommended route calculated at headquarters relevant route information is efficiently coded and transmitted to a terminal in a vehicle. Along the route calculated in the control center, route guidance points are defined that describe the driver's required actions, in particular the decision for a direction of travel. In particular, guide points are defined for departures, intersections or branches. On

Waypoint is therefore defined where a driver can continue from one street to different streets, i.e. where it is possible to turn off a street. The route information transmitted from the traffic control center to the terminal for a route guide point on the recommended route includes the location of the route guide point, whose route geometry determines the intersection geometry.

Geometry data and transition data defining the route through the waypoint. The location of the waypoint can be specified in particular in the form of geographic coordinates of the waypoint. The data format of route information is defined in the terminal and in the traffic control center. The locus may for example be transmitted in form of rounded to a certain length geographical ^'longitude, latitude.

The transition data expediently define the entry street of the vehicle into the waypoint in order to enable the user of the terminal in the vehicle to be efficiently informed about the planned route. This is also through the

Transfer of an exit road from a guidance point is advisable. The entrance road is the road or section of road from which a vehicle enters an intersection or approaches its junction. The exit road is the one road, which a vehicle of the recommended route is to continue from an intersection or turn possibility of accordance, so that street, ^'for which a driver to decide a vehicle at an intersection, junction or the like.

At least the intersection geometry of the next waypoint is expediently transmitted on the recommended route. In terms of transmission technology, it is also sensible to transmit route information to several guidance points in front of the vehicle in the direction of the route.

The guide point geometry data can in particular comprise angles to a street or a road segment at the guide point. You can the angles between the individual streets of an intersection, exit, etc. are given. The angles of each road, etc. can also be specified at a guidance point in relation to the current direction of travel of the vehicle or in relation to a compass direction. When transmitting an angle in relation to a fixed cardinal direction, for example north, the angle can easily be determined from a digital map, table etc. in the traffic control center.

The intersection geometry of a guidance point can be displayed optically in the control center. In the case of visual display, the terminal device and / or determined by the recommended route can be shown on a display etc. by the terminal

Exit road to at least one guide point are highlighted by brightness, bar thickness, color, etc. possibly an entry street and / or exit street deviating from a recommended route can be visually displayed with a different highlighting.

Detection of a wrong way, that is to say the detection of an actual route of the vehicle, which deviates from the recommended route, can be carried out by comparing transmitted guide point geometry data and / or guide point location data with one or more positions of the terminal device of the vehicle. For this, e.g. a GPS measurement in the terminal for location determination and / or a repeated one

GPS message can be used in the end device to determine the direction of travel.

The method according to the invention can be implemented as a program in a terminal and / or a traffic control center.

Further features and advantages of the invention result from the further claims and the following description of an exemplary embodiment with reference to the drawing. It shows:

Fig. 1 shows a part of a map of a transport network, a vehicle and a

Traffic center,

2 schematically shows an example of the route information for a recommended route that is transmitted from the traffic control center to a vehicle, Fig. 3 shows a possible representation of the route information to a

Waypoint on a display in a terminal in the vehicle with comments,

FIG. 4 shows the representation on the terminal side from FIG. 3 without comments.

The traffic network shown in detail in Fig. 1 shows the streets; 1 = Kölner Straße, 2 = Verdistraße, 3 = Mozartstraße, 4 = Hinterer Waldweg, 5 = Beethovenstraße, 6 = Bachstraße. Furthermore, a compass 7a is shown for this purpose, which indicates that the compass direction north is in the traffic network 1 to 6 in FIG. 1 above.

Coming from the south on Kölner Straße 1 there is a turning option (11) to the right into Beethovenstraße 5. When driving on Beethovenstraße 5, starting from the turning option (11) from Kölner Landstraße in an easterly direction, i.e. in Fig. 1 to the right, there are turning options 8 to the left into Verdistrasse 2, 8a into Hinteren Waldweg 4, (12) into Bachstrasse 6 and to the right there are turning options 9 into Verdistraße 2 and 10 into Mozartstrasse 3.

Route information can be transmitted from the control center 14 to a terminal in a vehicle 13 either to all turning options 8, 9, 10, 11, 12 of a vehicle at junctions or exits (10, 11, 12) and / or

Intersections (8, 9) on its route or only where a vehicle is to turn off a road (11, 12). In the vehicle, the user of the terminal device can either optically and / or acoustically etc. be shown only one representation of the next waypoint or a representation of two or more of the next waypoints on the recommended route.

The terminal in the vehicle 13 can determine its position using a position detection system, in particular GPS. If the position is determined several times, the direction of travel of the vehicle 13 can be determined from at least two positions determined in succession. Owing to

Positions and direction of travel of a vehicle 13 can be spatially assigned in the terminal in the vehicle to a route guidance point, to which route information has been transmitted 15 from the traffic control center 14 to the vehicle 13, with respect to the actual vehicle position and direction of travel. This is a graphic Representation and / or acoustic representation possible in a manner suitable for the user of the terminal.

2 illustrates, as an abstract diagram using an exemplary embodiment, the type of route information 16 transmitted from the traffic control center 14 to a terminal in a vehicle 13 relating to a proposed route. In the example shown, route information is transmitted to two waypoint points 11, 12 (in FIG. 1), which to a waypoint 11, 12 each have their location, the waypoint geometry data determining the intersection geometry in the form of angle information and the route of the vehicle along the proposed route include transition data defining the waypoint.

The data format of transmitted route information 16 is defined equally in the traffic center 14 and in the terminal 13. If several data formats are used, route information 16 can be preceded by a data sequence (header) which indicates to the terminal in which data format the following route information 16 is transmitted 15.

In the example in FIG. 2, it is initially indicated (by ni) that data is transmitted to a waypoint. Then the location of the waypoint is transmitted (1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 1, 2), here in a given, the geographical longitude and latitude of the location with a given rounding defining representation, namely 1, 2, 3, 4, 5, 6 for 12 °, 34 min. 56 sec. North longitude, 5, 0, 3, 4, 1, 2 for 50 °, 34 min .. 12 sec. East latitude (bn) of the waypoint 11. Furthermore, the intersection geometry of the waypoint 11 is given by angle information w ₍ , w ₂ , w _3. Each of the three angles here defines a street or a street segment which opens into the guide point 11 and specifies the direction from which the street segment or the street opens, as an angle An angle is given, ie there are three roads etc. at 11. The angle is given here as an angle with respect to north, so that the terminal can have a compass, for example, in order to evaluate the angle with respect to north can be read from a digital map of the traffic network or from a table of route guidance points, in Fig. 2 for each road indicated by an angle with respect to north etc. to a route guidance point 11, which are on the recommended route located, transition data 22, 23 specified. The transition date 22 specifies the entrance road (through w ₃ ) of the vehicle at the guide point 11 while observing the recommended route. The transition date 23 indicates the exit road to be selected by the vehicle when the recommended route is observed (w ₂ corresponding to the arrow 18 in FIGS. 3, 4).

A data record with route information 16 can be transmitted individually to a waypoint; however, it is also possible to transmit route information 16 to a plurality of guide points 11, 12 following in the direction of travel, for example in FIG. 2. In Fig. 2 it is indicated by "n ₂ " that

Follow data to another waypoint 12. To this are its geographic coordinates as longitude 12 °, 34 min., 56 sec. And geographic latitude 50 °, 34 min., 15 sec., The angles w ₄ , w ₅ , w ₆ of streets 5 (part between 11 and 12 ), 5 (part to the right of 12), 6 at waypoint 12 and transition information 24, 24a to entrance road w ₆ = 5) and exit road (w ₅ = 6) at waypoint 12. Here the guide point 12 is the next guide point after 11, at which a vehicle is to turn off a road. Guide points could also be defined for each departure and / or intersection, with route information relating to the turning options 8, 9, 10, 11 being transmitted.

The transmission takes place expediently by radio, in particular mobile radio.

FIG. 3 illustrates the specified angles wi, w ₂ , w ₃ for the guide point 11 (in FIG. 1) (in the data set in FIG. 2). The angle w ₁ is the angle at which the Kölner Strasse leads as 1 in Fig. 1 away from the guide point 11. The angle w ₂ is the angle to the north at which the Kölner Straße 1 in Fig. 1 leads downwards from the waypoint 11. The angle w ₃ is the angle to the north at which Beethovenstrasse 5 leads away from the guide point 11 in FIG. 1. The angle w ₁ is thus 10 °, the angle w _{2 is} 90 ° and the angle w _{3 is} 190 °. By transferring these three angles, the directions of the streets are here

Waypoint 11 and the number of streets at waypoint 11, namely three streets, are transmitted from the traffic control center to the terminal. On the basis of this transmitted data, a driver can be given an acoustic and / or visual indication of how he has to drive on the recommended route in the terminal before an intersection or departure. - 7 -

FIG. 3 shows a possible visual representation of a guide point 11 next in the direction of travel of the recommended route of the vehicle 13. An arrow 17 shows the direction from which the vehicle 13 is moving towards the guide point 11, that is to say from Cologne street 1 below from 11 in FIG. 1 or with the angle w ₃ in FIG. 3. The arrow 18 shows the guide point 11 (in the direction of travel of the recommended route) in which direction or on which road the vehicle at the guide point 11 should continue, that is in Fig. 1 in Beethovenstrasse 5 to the right in Fig. 1, 3 or to the east. Furthermore, line 19 shows each, here, another street which branches off from waypoint 11, but which should not be traveled on the recommended route, i.e. here the part of Cologne street 1 located above waypoint 11 in FIG. 1. Furthermore, a coordinate cross 21 can be shown as a display or in the form of a compass in the terminal.

Fig. 4 shows a possible representation in the terminal without comments.

The method is expedient to implement in a terminal and / or in a control center 14.

Claims

claims

1. Method for transmitting (15) route information (16) relating to a recommended route (1, 5, 6) of a vehicle (13) in a traffic network (1 to 6) from a traffic control center (14) to a terminal in a vehicle ( 13), the route information (16) on the route guide points (11,

12), wherein a guidance point is defined at a location where a vehicle can continue in several directions, the following being transmitted to a guidance point (11):

the location (In, bn) of the guide point 1 1 determining guide point location data (25),

- geometry data (26, w ,, w ₂ , w ₃ ) relating to the intersection geometry of the waypoint,

- Transition data (22, 23) defining the route through the route point (11).

2. The method according to claim 1, characterized in that the location is specified as geographic coordinates (In, bn) of the guide point.

3. The method according to any one of the preceding claims, characterized in that the transition data (22, 23) the entry road (22, w ₃ , 1 below) of

Define the vehicle (13) in a guidance point (11).

4. The method according to any one of the preceding claims, characterized in that the transition data, the exit road (23, w ₂ , 5) from a Wegleitpunkt

Define (11).

5. The method according to any one of the preceding claims, characterized in that at least route data to the next guide point (11) in the direction of travel on the recommended route are transmitted in front of the vehicle (13).

6. The method according to any one of the preceding claims, characterized in that a Wegleitpunkt is defined at an entrance or entrance on the proposed route.

Method according to one of the preceding claims, characterized in that a route guide point is defined on an intersection of two roads on the proposed route.

Method according to one of the preceding claims, characterized in that for all turning options, in particular entrances, driveways and

Intersections, a waypoint is defined.

Method according to one of claims 1 to 7, characterized in that a guide point is defined at the turning options at which

(11, 12) the recommended route requires turning off a road etc.

10. The method according to any one of the preceding claims, characterized in that the Wegleitpunkt geometry data to a Wegleitpunkt with the Wegleitpunkt connected roads, road segments and the like with a road, the road segment or the like related angle.

11. The method according to claim 10, characterized in that the angle of a road connected to a guide point or the like is given in each case as an angle with respect to a cardinal direction, in particular with respect to the north.

12. The method according to any one of the preceding claims, characterized in that the intersection geometry of a Wegleitpunktes is displayed optically by the terminal.

13. The method according to claim 12, characterized in that the entrance road of a vehicle is shown highlighted in a Wegleitpunkt.

14. The method according to claim 12 or 13, characterized in that the exit road of a vehicle from a Wegleitpunkt is shown highlighted according to a recommended route.

15. The method according to any one of the preceding claims, characterized in that based on the Wegleitpunkt geometry data, in particular acoustic, text information on the recommended direction of travel, in particular the next, Wegleitpunkt is determined and output.

16. The method according to any one of the preceding claims, characterized in that by comparing the actual direction of travel with that by Wegleitpunkt-

Geometry data defined travel direction, wrong-way detection is carried out.

17. The method according to claim 16, characterized in that a recalculation of a route by the control center (14) is carried out in the event of incorrect travel detection and route information is transmitted to the terminal for this new route.

18. The method according to any one of the preceding claims, characterized in that the actual direction of travel of a vehicle by multiple position measurement, in particular GPS measurement, is determined in the terminal.

19. The method according to any one of the preceding claims, characterized in that for the actual direction of travel of a vehicle, the direction of entry into a Wegleitpunkt determined and displayed by the terminal.

20. The method according to any one of the preceding claims, characterized in that a route calculation program is used for route calculation in the control center.

21. The method according to any one of the preceding claims, characterized in that a digital map of the transport network is used in the control center for route calculation.

22. Terminal with a memory, with a program stored in the memory for carrying out the method according to the features of one of the preceding claims or according to one of the preceding claims, with a microprocessor for executing the program, with a

Communication device, in particular mobile radio device, and with an optical and / or acoustic user interface.

23. Terminal according to claim 22, characterized in that it has a position detection system, in particular GPS.

24. Traffic control center with a memory, with one stored in the memory

Program for carrying out the method according to the features of one of claims 1 to 21 or according to one of claims 1 to 21, with a microprocessor for executing the program, with a communication device for transmitting route data (15) to a terminal in a vehicle (13).