US20010001847A1 - Vehicle routing and guidance system - Google Patents
Vehicle routing and guidance system Download PDFInfo
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- US20010001847A1 US20010001847A1 US09/141,171 US14117198A US2001001847A1 US 20010001847 A1 US20010001847 A1 US 20010001847A1 US 14117198 A US14117198 A US 14117198A US 2001001847 A1 US2001001847 A1 US 2001001847A1
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- vehicle
- route
- navigation system
- server
- guidance
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- 238000004891 communication Methods 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096805—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
- G08G1/096811—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed offboard
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/3407—Route searching; Route guidance specially adapted for specific applications
- G01C21/3415—Dynamic re-routing, e.g. recalculating the route when the user deviates from calculated route or after detecting real-time traffic data or accidents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/3453—Special cost functions, i.e. other than distance or default speed limit of road segments
- G01C21/3492—Special cost functions, i.e. other than distance or default speed limit of road segments employing speed data or traffic data, e.g. real-time or historical
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096805—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
- G08G1/096811—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed offboard
- G08G1/096822—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed offboard where the segments of the route are transmitted to the vehicle at different locations and times
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
Definitions
- the present invention relates to a vehicle routing and guidance system and, more particularly, to a vehicle routing and guidance comprising a navigation system that includes a self-locating means for the vehicle and a superordinate server system for making of navigational information available to the navigation system, whereby the navigational system communicates with the server system at least temporarily by means of transmitter and receiver devices.
- Vehicle-based navigation systems are known for guidance of vehicles. These systems use map information required for navigation in the vehicle in order to guide the vehicle to a destination point predetermined by the operator of the vehicle. All information required for the entire route is supplied in the vehicle. It is disadvantageous however that a correspondingly large memory capacity is required for the memory used in the navigation system for a number of different destinations over a comparatively large region or territory. Furthermore it is also disadvantageous that information effecting the destination of the vehicle, for example detours, road blockages and so on, is not considered.
- vehicle routing and guidance systems include traffic guidance devices arranged at fixed locations along a path of travel of the vehicle, by means of which navigational information corresponding to the selected route is transmitted from those traffic guidance devices that the vehicle passes during its travel.
- a vehicle routing and guidance system comprising a vehicle-based navigation system that includes a self-locating means for the vehicle and a superordinate server system for making navigational information available to the navigation system, whereby the navigation system communicates with the superordinate server system at least temporarily by means of transmitter and receiver devices.
- the navigation system includes an input device by which at least one destination is input thereto, the server system includes means for determining a route for the vehicle from the at least one destination and means for transmitting the route determined from the at least one destination piecewise to the navigation system.
- the vehicle routing and guidance system has the advantage that it provides an efficient dynamic guidance to a destination, which means that actual changes by means of additional further transmissions of navigational information are possible during travel of the vehicle over the route, by determining the position of the vehicle by means of a comparatively simple built-in vehicle-based navigational system, for example a GPS, and by an exchange of comparatively little information for route guidance with the server system communicating with the navigational system.
- the server system includes means for determining a route for the vehicle from the at least one destination and means for transmitting the route determined from the at least one destination piecewise to the navigation system.
- piecewise transmission means that each route section is transmitted to the vehicle-based navigation system only when the previous route section has been traversed.
- the vehicle routing and guidance system comprises a vehicle-based navigation system located in a vehicle, a superordinate server system for making navigational information available to the navigation system including means for establishing a communications link between the navigation system and the server system prior to start of travel of the vehicle for transmission of a most updated route for vehicle travel from a predetermined destination from the server system to the navigation system and transmitter and receiver means for at least temporarily establishing communication between the server system and the navigation system.
- a vehicle-based navigation system located in a vehicle, a superordinate server system for making navigational information available to the navigation system including means for establishing a communications link between the navigation system and the server system prior to start of travel of the vehicle for transmission of a most updated route for vehicle travel from a predetermined destination from the server system to the navigation system and transmitter and receiver means for at least temporarily establishing communication between the server system and the navigation system.
- the navigation system Since the navigation system is connected with the server system prior to the start of travel so that the updated route derived from the predetermined destination by the server system is read into the navigation system, it is advantageously possible to take into account all traffic information since the beginning of travel in preparing the travel route.
- the vehicle-based navigation system needs no large memory capacity to set up routes to all eventually possible destinations since only the actual route associated with the particular actual destination is copied into the navigation system and needs to be stored in it.
- travel or traffic information for example, street blockages, current traffic density, traffic predictions and the like, can be taken into account in preparing the route in a timely manner up to the start of travel. It is preferable when the navigation system is connected with the server system by means of a telecommunications server, for example a wired or wireless telecommunications network, for copying of the route information.
- certain selectable, for example repeatedly used routes are stored in the navigation system.
- the route corresponding to the actually selected route is updated by the server system via the communications link before travel starts.
- dynamic navigational information is made available in the vehicle results, which means taking updated traffic information into consideration.
- FIGS. 1 a and 1 b are, respectively, a simplified block diagram of a central server for a vehicle routing and guidance system according to the invention and a portion of a map showing a starting point and destination used by the vehicle routing and guidance system according to the invention;
- FIG. 2 is a simplified block diagram of a vehicle routing and guidance system according to the invention.
- a map 10 is shown schematically in FIG. 1 b , with the aid of which the vehicle routing and guidance system according to the invention is explained in more detail.
- the present example is based on an unshown motor vehicle traveling from a starting point A on the map to a destination B.
- the driver of the vehicle enters the destination B into his vehicle-based navigation system 53 at the starting point A.
- the navigation system 53 sets up a wireless communications link 14 with the central server 12 as shown in FIG. 1 a .
- the communications link 14 can be made, for example, by cellular telephone.
- the vehicle and also the central server have receiver and transmitter devices 13 .
- the server system 12 conducts the information, namely the aforementioned destination B, to a processor 17 , which computes an optimum route 16 for reaching the destination with the aid of a detailed map of the entire area stored in the processor 17 .
- This route 16 is produced from the stored map 10 and additional actual external traffic information 18 , with which the central server is continuously provided.
- the traffic information 18 can include, for example, information regarding blocked streets, traffic congestion, unfavorable weather conditions and the like.
- the route 16 is transmitted to the vehicle piecewise by means of the communications link 14 considering the traffic information 18 and the map 10 .
- the individual sections of the route 16 are transmitted to the vehicle according to a previously established division of the map 10 .
- the map 10 is divided into certain region, of which here, for example, the region 20 , region 22 , region 24 , region 26 , region 28 and region 30 are named.
- the division of the regions 20 to 30 and also other unshown region can be according to geographic conditions, administrative organizations (districts, municipalities, townships and so forth) or other freely selectable criteria.
- the individual regions 20 to 30 border each other at respective transmission points 32 (For simplicity of illustration only one transmission point 32 is shown in FIG. 1, but they exist between all regions of the map 10 ).
- a partial route or route section can be, for example, limited to one region on the highway during a long-distance journey on the highway and cover a comparatively large distance.
- the route covers all streets during a city trip and covers a comparatively small distance.
- the best route 16 for the vehicle is determined in the central server 12 , separately acquired and stored in the central server according to the requirements of the vehicle that travels from starting point A to destination B. For example, the route 16 passes through the regions 20 , 22 , 24 , 26 , 28 and 30 .
- First a first section 34 of the route 16 which is associated with the section or portion of the route 16 in the region 20 , is copied to the navigation system of the vehicle.
- a detailed digital map exclusively for the region 20 is transmitted to the navigation system of the vehicle. Since the navigation system of the vehicle does not detect and store the entire detailed map 10 , but only the region 20 , a correspondingly small memory capacity is provided in the navigation system.
- the transmission point 32 between the regions 20 and 22 is provided as an intermediate destination for the navigation system of the vehicle. This means that the driver of the vehicle obtains no information from this intermediate goal regarding when he will arrive at the destination B.
- the autonomous intermediate destination at the transmission point 32 between the regions 20 and 22 is however the apparent destination for the navigation system of the vehicle.
- the navigation system of the vehicle can provide the driver or operator with the required information in different ways, for example by display of a suitable map on a display device, by a digital speech synthesizer or other digital or analog devices for guiding the vehicle.
- the server system 12 detects an approach of the vehicle to the transmission point 32 between the regions 20 and 22 by means of the navigation system in the vehicle.
- the next section of the route 16 which, in the indicated example, is in region 22 , is copied to the navigation system of the vehicle by means of the receiver and transmitter devices 13 when the vehicle reaches the transmission point 32 or shortly prior to reaching the transmission point 32 . Since the region 20 has already been traversed, the navigational information for it can be erased. Thus no additional memory capacity is required.
- the vehicle routing and guidance system advantageously divides the work required for navigation of the vehicle between internal navigation system in the vehicle and the central server 12 .
- the powerful processor 17 of the central server 12 performs the comparatively difficult calculation of the route 16 and its continuous updating, even after the start of the journey from the starting point A.
- updated traffic information 18 is considered during set up or change of the route 16 .
- the autonomous navigation system of the vehicle only needs to have a small memory capacity, since the route is only stored piecewise with respect to regions 20 to 30 .
- the navigation system only detects the autonomous intermediate destinations at the transmission points, that are not known to the operator, since they are subordinated to the reaching of the final destination B.
- a deviation of the vehicle from the predetermined route 16 is detected by the server system 12 by means of a self-location of the vehicle, so that immediate influences can be immediately taken into consideration for an eventual change of route 16 during preparation of the navigational information.
- Either the information that the original predetermined route 16 was abandoned is transmitted to the operator of the vehicle or a new route 16 is prepared internally, which means not known to the operator of the vehicle and copied to the navigation system.
- Changes in the subsequent regions 20 to 30 resulting from the changes of the route 16 are then considered internally by the server system 12 , when the sections of the route 16 passing through the respective regions 20 to 30 to be later traversed are transmitted on reaching the respective transmission points.
- FIG. 2 An additional embodiment of the vehicle routing and guidance system according to the invention is shown schematically in FIG. 2. The same parts as in FIG. 1 are provided with the same reference number in FIG. 1 and are not explained in further detail.
- the autonomous navigation system 35 of the vehicle is connected with the central server 12 by a communications link 14 before the start of the trip.
- the communications link 14 can be a line connection, such as a telephone line, a broad band cable or similar connection, in this case.
- the navigation system 35 has an interface 36 , by which communication with the central sever 12 is possible.
- the destination B is transmitted to the central server 12 by means of an input device 38 .
- the optimum route 16 is determined by the processor 17 of the central sever and transmitted to the navigation system 35 .
- the navigation system 35 has a memory unit 38 , in which the navigational information transmitted according to the route 16 can be stored. Since a loading of the route 16 in the memory can occur shortly prior to the start of the trip or journey, the updated traffic information 18 from the processor 17 can be considered in planning the optimum route 16 .
- the memory 38 of the navigation system 35 is portable, for example in the form of a diskette or CD-ROM or DVD, which is insertable in a suitable data processing unit for storing the actual route 16 or the navigation system 35 is coupled directly with the communications link 14 via the interface 36 . Since only the actual route 16 is stored in the memory 38 , the memory capacity can be reduced to a required minimum, since the entire map 10 (FIG. 1) with all the eventual possible destinations does not need to be stored in it.
- the memory 38 can store several routes usually used as standard routes by the vehicle. By connection to the central server 12 shortly prior to the start of the trip an update of the route 16 can take place, whereby the actual traffic information currently available in the central server 12 is considered in planing the route 16 . Also the advantage that the entire road network with all its destinations does not need to be made available or stored in the navigation system 35 results.
- FIGS. 1 and 2 A combination of the embodiments of FIGS. 1 and 2 for the vehicle routing and guidance system is possible.
- a route 16 corresponding to a selected destination B can be loaded into the navigation system 35 , by means of an line-type communications link 14 , for example by means of an ISDN.
- the actual position of the vehicle is monitored by the central server 12 by means of a self-location performed by the vehicle during its travel over the route 16 from the starting point A to the destination B. Only when changes in the route 16 in individual regions 20 to 30 through which the route 16 passes occur in the intervening time, which means after loading the route 16 , an appropriate data exchange and correction of the route 16 occurs in the navigation system 35 by means of updated traffic information 18 .
- the data exchange is kept to a minimum during travel because the data exchange only concerns the eventually required changes in the route 16 .
- the present invention is not limited to the above-described embodiments.
- German Patent Application 197 37 256.2-32 of Aug. 27, 1997 is incorporated here by reference.
- This German Patent Application describes the invention described hereinabove and claimed in the claims appended hereininbelow and provides the basis for a claim of priority for the instant invention under 35 U.S.C. 119.
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a vehicle routing and guidance system and, more particularly, to a vehicle routing and guidance comprising a navigation system that includes a self-locating means for the vehicle and a superordinate server system for making of navigational information available to the navigation system, whereby the navigational system communicates with the server system at least temporarily by means of transmitter and receiver devices.
- 2. Prior Art
- Vehicle-based navigation systems are known for guidance of vehicles. These systems use map information required for navigation in the vehicle in order to guide the vehicle to a destination point predetermined by the operator of the vehicle. All information required for the entire route is supplied in the vehicle. It is disadvantageous however that a correspondingly large memory capacity is required for the memory used in the navigation system for a number of different destinations over a comparatively large region or territory. Furthermore it is also disadvantageous that information effecting the destination of the vehicle, for example detours, road blockages and so on, is not considered.
- Furthermore superordinate server systems for preparation of navigational data are known, by means of which routes corresponding to a destination predetermined by the operator of the vehicle are transmitted to the vehicle-based navigation system. The entire navigational information for the chosen destination is transmitted. It is disadvantageous therefore that a comparatively large amount of information is to be transmitted and changes during travel over the route can no longer be considered.
- By “route” a section of a digital chart or map with at least one destination, which is useable in a vehicle-based navigation system, is to be understood. For guidance to the destination the vehicle must be located on the digital chart, which means the route.
- Furthermore vehicle routing and guidance systems are known that include traffic guidance devices arranged at fixed locations along a path of travel of the vehicle, by means of which navigational information corresponding to the selected route is transmitted from those traffic guidance devices that the vehicle passes during its travel.
- It is an object of the present invention to provide an improved vehicle routing and guidance system that does not have the above-described disadvantages.
- These objects, and others which will be made more apparent hereinafter, are attained in a vehicle routing and guidance system comprising a vehicle-based navigation system that includes a self-locating means for the vehicle and a superordinate server system for making navigational information available to the navigation system, whereby the navigation system communicates with the superordinate server system at least temporarily by means of transmitter and receiver devices.
- According to the invention, the navigation system includes an input device by which at least one destination is input thereto, the server system includes means for determining a route for the vehicle from the at least one destination and means for transmitting the route determined from the at least one destination piecewise to the navigation system.
- The vehicle routing and guidance system according to the invention has the advantage that it provides an efficient dynamic guidance to a destination, which means that actual changes by means of additional further transmissions of navigational information are possible during travel of the vehicle over the route, by determining the position of the vehicle by means of a comparatively simple built-in vehicle-based navigational system, for example a GPS, and by an exchange of comparatively little information for route guidance with the server system communicating with the navigational system. It is advantageously possible to provide the required memory capacity needed for the route section prepared by the server system in the memory of the vehicle-based navigation system because the navigation system includes an input device by which at least one destination is input thereto, the server system includes means for determining a route for the vehicle from the at least one destination and means for transmitting the route determined from the at least one destination piecewise to the navigation system. The term ‘piecewise transmission’ means that each route section is transmitted to the vehicle-based navigation system only when the previous route section has been traversed. By piecewise transmission of the entire route in route sections prior to reaching the destination, changes can be considered in sections or parts of the route over which the vehicle has not traveled during its travel over the route and can be transmitted to the navigation system. Thus dynamic navigational information of significant events which are comparatively far removed from the actual position of the vehicle can be made available to the navigation system over the entire route, without adding memory capacity in the vehicle-based navigation system and additional data transmission capacity for communication between the navigation system and the central server system. When an actual position of the vehicle transmitted to the server system is just in the next route section, the actual route section already prepared by the central server is then transmitted to the navigation system of the vehicle.
- In another embodiment the vehicle routing and guidance system according to the invention comprises a vehicle-based navigation system located in a vehicle, a superordinate server system for making navigational information available to the navigation system including means for establishing a communications link between the navigation system and the server system prior to start of travel of the vehicle for transmission of a most updated route for vehicle travel from a predetermined destination from the server system to the navigation system and transmitter and receiver means for at least temporarily establishing communication between the server system and the navigation system. This embodiment provides the advantage that the vehicle-based navigation system can be loaded with an updated or actual route according to the destination selected immediately prior to start. Since the navigation system is connected with the server system prior to the start of travel so that the updated route derived from the predetermined destination by the server system is read into the navigation system, it is advantageously possible to take into account all traffic information since the beginning of travel in preparing the travel route. The vehicle-based navigation system needs no large memory capacity to set up routes to all eventually possible destinations since only the actual route associated with the particular actual destination is copied into the navigation system and needs to be stored in it. Furthermore travel or traffic information, for example, street blockages, current traffic density, traffic predictions and the like, can be taken into account in preparing the route in a timely manner up to the start of travel. It is preferable when the navigation system is connected with the server system by means of a telecommunications server, for example a wired or wireless telecommunications network, for copying of the route information.
- In another preferred embodiment of the invention certain selectable, for example repeatedly used routes, are stored in the navigation system. The route corresponding to the actually selected route is updated by the server system via the communications link before travel starts. Thus dynamic navigational information is made available in the vehicle results, which means taking updated traffic information into consideration.
- Additional advantageous embodiments of the invention result from other features claimed in the appended dependent claims.
- The objects, features and advantages of the invention will now be illustrated in more detail with the aid of the following description of the preferred embodiments, with reference to the accompanying figures in which:
- FIGS. 1a and 1 b are, respectively, a simplified block diagram of a central server for a vehicle routing and guidance system according to the invention and a portion of a map showing a starting point and destination used by the vehicle routing and guidance system according to the invention; and
- FIG. 2 is a simplified block diagram of a vehicle routing and guidance system according to the invention.
- A
map 10 is shown schematically in FIG. 1b, with the aid of which the vehicle routing and guidance system according to the invention is explained in more detail. The present example is based on an unshown motor vehicle traveling from a starting point A on the map to a destination B. The driver of the vehicle enters the destination B into his vehicle-basednavigation system 53 at the starting point A. Thenavigation system 53 sets up awireless communications link 14 with thecentral server 12 as shown in FIG. 1a. Thecommunications link 14 can be made, for example, by cellular telephone. The vehicle and also the central server have receiver andtransmitter devices 13. - The
server system 12 conducts the information, namely the aforementioned destination B, to aprocessor 17, which computes anoptimum route 16 for reaching the destination with the aid of a detailed map of the entire area stored in theprocessor 17. Thisroute 16 is produced from thestored map 10 and additional actualexternal traffic information 18, with which the central server is continuously provided. Thetraffic information 18 can include, for example, information regarding blocked streets, traffic congestion, unfavorable weather conditions and the like. - The
route 16 is transmitted to the vehicle piecewise by means of thecommunications link 14 considering thetraffic information 18 and themap 10. The individual sections of theroute 16 are transmitted to the vehicle according to a previously established division of themap 10. Themap 10 is divided into certain region, of which here, for example, theregion 20,region 22,region 24,region 26,region 28 andregion 30 are named. The division of theregions 20 to 30 and also other unshown region can be according to geographic conditions, administrative organizations (districts, municipalities, townships and so forth) or other freely selectable criteria. Theindividual regions 20 to 30 border each other at respective transmission points 32(For simplicity of illustration only onetransmission point 32 is shown in FIG. 1, but they exist between all regions of the map 10). The division of the regions with the aid of travel-specific border conditions is advantageous. A partial route or route section can be, for example, limited to one region on the highway during a long-distance journey on the highway and cover a comparatively large distance. The route covers all streets during a city trip and covers a comparatively small distance. - The
best route 16 for the vehicle is determined in thecentral server 12, separately acquired and stored in the central server according to the requirements of the vehicle that travels from starting point A to destination B. For example, theroute 16 passes through theregions first section 34 of theroute 16, which is associated with the section or portion of theroute 16 in theregion 20, is copied to the navigation system of the vehicle. A detailed digital map exclusively for theregion 20 is transmitted to the navigation system of the vehicle. Since the navigation system of the vehicle does not detect and store the entiredetailed map 10, but only theregion 20, a correspondingly small memory capacity is provided in the navigation system. Next thetransmission point 32 between theregions transmission point 32 between theregions - The navigation system of the vehicle can provide the driver or operator with the required information in different ways, for example by display of a suitable map on a display device, by a digital speech synthesizer or other digital or analog devices for guiding the vehicle.
- The
server system 12 detects an approach of the vehicle to thetransmission point 32 between theregions route 16, which, in the indicated example, is inregion 22, is copied to the navigation system of the vehicle by means of the receiver andtransmitter devices 13 when the vehicle reaches thetransmission point 32 or shortly prior to reaching thetransmission point 32. Since theregion 20 has already been traversed, the navigational information for it can be erased. Thus no additional memory capacity is required. - When the portion of the
route 16 in theregion 22 is first copied to the navigation system on reaching thetransmission point 32,traffic information 18 generated since the start of the journey from the starting point A can be processed by theprocessor 17 and considered in set up the actual or updatedroute 16 to be traveled. The internal route that is set up by thecentral server 12 can change during the actual travel over theroute 16 without the driver's knowledge. The copying of the next section of the route on reaching the next transmission point between theregions region 24 from thecentral server 12 to the navigation system of the vehicle. This process is continued until the destination B is reached. - As a whole the vehicle routing and guidance system advantageously divides the work required for navigation of the vehicle between internal navigation system in the vehicle and the
central server 12. Thepowerful processor 17 of thecentral server 12 performs the comparatively difficult calculation of theroute 16 and its continuous updating, even after the start of the journey from the starting point A. Thus a dynamic guidance of the vehicle is possible, since updatedtraffic information 18 is considered during set up or change of theroute 16. The autonomous navigation system of the vehicle only needs to have a small memory capacity, since the route is only stored piecewise with respect toregions 20 to 30. The navigation system only detects the autonomous intermediate destinations at the transmission points, that are not known to the operator, since they are subordinated to the reaching of the final destination B. - A deviation of the vehicle from the predetermined
route 16 is detected by theserver system 12 by means of a self-location of the vehicle, so that immediate influences can be immediately taken into consideration for an eventual change ofroute 16 during preparation of the navigational information. Either the information that the originalpredetermined route 16 was abandoned is transmitted to the operator of the vehicle or anew route 16 is prepared internally, which means not known to the operator of the vehicle and copied to the navigation system. Changes in thesubsequent regions 20 to 30 resulting from the changes of theroute 16 are then considered internally by theserver system 12, when the sections of theroute 16 passing through therespective regions 20 to 30 to be later traversed are transmitted on reaching the respective transmission points. - An additional embodiment of the vehicle routing and guidance system according to the invention is shown schematically in FIG. 2. The same parts as in FIG. 1 are provided with the same reference number in FIG. 1 and are not explained in further detail.
- According to the embodiment shown in FIG. 2 the
autonomous navigation system 35 of the vehicle is connected with thecentral server 12 by acommunications link 14 before the start of the trip. The communications link 14 can be a line connection, such as a telephone line, a broad band cable or similar connection, in this case. Furthermore the radio link illustration in FIG. 1 to thecentral server 12 can also occur. Thenavigation system 35 has aninterface 36, by which communication with the central sever 12 is possible. The destination B is transmitted to thecentral server 12 by means of aninput device 38. Theoptimum route 16 is determined by theprocessor 17 of the central sever and transmitted to thenavigation system 35. Thenavigation system 35 has amemory unit 38, in which the navigational information transmitted according to theroute 16 can be stored. Since a loading of theroute 16 in the memory can occur shortly prior to the start of the trip or journey, the updatedtraffic information 18 from theprocessor 17 can be considered in planning theoptimum route 16. - In practice either the
memory 38 of thenavigation system 35 is portable, for example in the form of a diskette or CD-ROM or DVD, which is insertable in a suitable data processing unit for storing theactual route 16 or thenavigation system 35 is coupled directly with the communications link 14 via theinterface 36. Since only theactual route 16 is stored in thememory 38, the memory capacity can be reduced to a required minimum, since the entire map 10 (FIG. 1) with all the eventual possible destinations does not need to be stored in it. - If necessary the
memory 38 can store several routes usually used as standard routes by the vehicle. By connection to thecentral server 12 shortly prior to the start of the trip an update of theroute 16 can take place, whereby the actual traffic information currently available in thecentral server 12 is considered in planing theroute 16. Also the advantage that the entire road network with all its destinations does not need to be made available or stored in thenavigation system 35 results. - A combination of the embodiments of FIGS. 1 and 2 for the vehicle routing and guidance system is possible. Thus prior to the start of the journey a
route 16 corresponding to a selected destination B can be loaded into thenavigation system 35, by means of an line-type communications link 14, for example by means of an ISDN. The actual position of the vehicle is monitored by thecentral server 12 by means of a self-location performed by the vehicle during its travel over theroute 16 from the starting point A to the destination B. Only when changes in theroute 16 inindividual regions 20 to 30 through which theroute 16 passes occur in the intervening time, which means after loading theroute 16, an appropriate data exchange and correction of theroute 16 occurs in thenavigation system 35 by means of updatedtraffic information 18. The data exchange is kept to a minimum during travel because the data exchange only concerns the eventually required changes in theroute 16. - The present invention is not limited to the above-described embodiments. For example, it is also possible to input several destinations, instead of a single destination B, with the help of knowledge from a customer service representative, or with commercial carriers, whereby the
central server 12 determines anoptimum route 16 for travel to several destinations. - The disclosure in German Patent Application 197 37 256.2-32 of Aug. 27, 1997 is incorporated here by reference. This German Patent Application, at least in part, describes the invention described hereinabove and claimed in the claims appended hereininbelow and provides the basis for a claim of priority for the instant invention under 35 U.S.C. 119.
- While the invention has been illustrated and described as embodied in a vehicle routing and guidance system, it is not intended to be limited to the details shown, since various modifications and changes may be made without departing in any way from the spirit of the present invention.
- Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.
- What is claimed is new and is set forth in the following appended claims.
Claims (13)
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DE19737256 | 1997-08-27 | ||
DE19737256.2-32 | 1997-08-27 | ||
DE19737256A DE19737256B4 (en) | 1997-08-27 | 1997-08-27 | Vehicle guidance and guidance system |
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US20010001847A1 true US20010001847A1 (en) | 2001-05-24 |
US6334089B2 US6334089B2 (en) | 2001-12-25 |
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Also Published As
Publication number | Publication date |
---|---|
EP0899704B1 (en) | 2004-11-03 |
DE19737256B4 (en) | 2005-02-24 |
US6334089B2 (en) | 2001-12-25 |
EP0899704A3 (en) | 2000-07-05 |
DE19737256A1 (en) | 1999-03-04 |
DE59812206D1 (en) | 2004-12-09 |
EP0899704A2 (en) | 1999-03-03 |
ES2231921T3 (en) | 2005-05-16 |
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