WO2009071366A1

WO2009071366A1 - Method for operating an information system and an information system

Info

Publication number: WO2009071366A1
Application number: PCT/EP2008/063730
Authority: WO
Inventors: Wilhelm Vogt; Guido Mueller; Axel Varchmin; Ulrich Kersken
Original assignee: Robert Bosch Gmbh
Priority date: 2007-12-03
Filing date: 2008-10-13
Publication date: 2009-06-11
Also published as: DE102007058092A1

Abstract

The invention relates to an information system and a method for operating an information system (1), comprising a main memory (2), optionally a data carrier holding device (5) for receiving a memory (6), in particular a data carrier, and a display element (3) and, optionally, an operating element (4). According to the invention, the memory comprises card data that can be used essentially for route determination, wherein a particular route is selected for navigation to the destination and the probabilities that a calculated search result can be satisfied, maintained, obtained and/or used may be taken into account in the course of the selection process.

Description

Method for operating an information system and an information system

description

Technical area

The invention relates to an information system, such as in particular an information system for road users, pedestrians and / or drivers of vehicles, such as a navigation system and a method for operating an information system, in which based on map data and a current position information, a route is determined and optionally a route guidance carried out and / or points of interest are sought.

State of the art

Information systems use searches for a wide variety of applications. Examples of such searches are route search and points of interest (POI) search, where POI search is the search for points of interest such as interest. Sights, petrol stations, restaurants, airports, train stations, parking lots, etc. are understood.

In information systems, such as in navigation systems for motor vehicles, digital map data are typically used, for example to display a map or environment on a display or to enter goals or by means of a route guidance the driver of the vehicle to a previously defined destination by issued driving instructions respectively. The used digital map data The digital maps have roads that can be represented for example by so-called edges. On the basis of a current position determination and a position indication resulting therefrom, route route guidance can be carried out by means of the map data and an input destination.

At the moment, a distinction is made between different routes / characteristics. For example, a distance-optimized route (user selection: short) to the destination may be desired, whereupon the shortest route between the current position information and the desired destination is calculated, irrespective of the travel time for the selected route. It is also possible to select a different route criterion so that the time-optimized route (user selection: fast) is calculated and the selection criterion is the shortest travel time to be expected. However, it is assumed that it can be driven on each street with its associated driving speed. In prior art devices, traffic congestion is also taken into account so that an alternative route is proposed in the event of a traffic disturbance along the selected route. This is done by receiving and processing traffic information e.g. RDS-TMC (see, for example, DE 40 08 460 A1). The disturbance variables used in the system are fixed / concrete values that may change depending on the time of day and reported traffic disturbance, but are assumed to be fixed at the time of calculation.

It is thus known that navigation systems calculate routes that lead to a destination in terms of distance or time. Also, a mixture of the route criteria ("optimal" route, "eco-route") for a route search is known in the art.

The user of a navigation system, for example, in a vehicle often has a fixed date that he would like to comply, such as For example, an appointment regarding a train or flight connection with a journey to the train station or airport or another appointment. In order to reach this date, he will enter the destination in his navigation or at home on the PC, select the route options / stores and have a route calculated using the current state of the art. Accordingly, for example, the calculated travel time and possibly a correction taking into account a different starting location, the user would choose his start time. If the travel time on this route varies greatly, for example due to closed train barriers, slow vehicles that can not be overtaken, or unfavorable traffic light circuits, the user may miss his appointment.

Thus, the prior art methods have the disadvantage of having only typical values, e.g. Use average speeds or travel times related to roads or edges. However, there is no consideration of statistical fluctuations, so that a timely achievement of goals can be at risk.

It is also known in the prior art, for example from DE 102 26 686 A1, that the user of an information system can search for points of interest in the vicinity of the current position, in the vicinity of a predefined target position or on the route between current position and destination position. The search criterion is e.g. the shortest distance to a point of interest (POI). Route guidance to the nearest POI is possible after user selection or automatically.

A drawback of the prior art is that probabilities of being able to use the POI in the expected manner are not taken into account in the search. For example, it makes little sense to direct the user of a motor vehicle at night to a gas station, which causes the least detour, but is expected to be closed because it belongs, for example, to a company chain, usually at night their gas stations close or because the gas station is located in a small village where the likelihood of a 24-hour opening is low. It would be more useful to prefer in the search of such gas stations, for example, located on highways (truck stops, directly to rest areas) or large access roads in major cities. Analogous examples would be open restaurants, reliable partners (eg of workshops, determined from test reports), favorable prices (eg of restaurants or shops, which often make special offers), good service (eg from test reports), good opening times, good food (eg at truck stops or normal restaurants). The analogous examples are not equivalent ("open restaurant" does not mean "good food", "opening hours" would be equivalent to "good food"). You choose a POI (eg restaurant, gas station) because you are looking for a specific service (food, refueling) and this service is subject to variance / variability (quality of food, refueling not possible because gas station closed), which is either the system is not known or can only be described statistically. One and the same POI may also have multiple "benefits" that are subject to variance and that may be considered for a selection in combination, for example: restaurant -> opening hours, quality of food.

DESCRIPTION OF THE INVENTION: Problem, Solution, Advantages

The object of the invention is to provide a method for operating an information system, which is improved over the prior art.

This object is achieved with a method for operating an information system, such as in particular an information system for road users, pedestrians and / or drivers of vehicles, which takes into account in his search algorithms related points, sizes, conditions and / or situations and / or the resulting Indicates and / or presents probabilities for fulfillment, compliance, arrival and / or usability of a computed search result. It can thereby be achieved that the variance is taken into account in the selection and an optimized search is thereby carried out.

In particular, the application of the method is advantageous if the search result is a result of a search for a point of interest (POI).

It is expedient here if the variables or states subject to variation are opening times, quality, cleanliness, equipment level, size, parking possibilities, reputation, goodwill, price and / or price / performance ratio.

It is particularly advantageous if the simultaneous consideration of several variable-dependent variables is provided.

In another embodiment, it is useful if a search result is a probability for many points of interest (POI), such as many gas stations, restaurants, etc., since then the probability of usability is increased.

Furthermore, it is advantageous if several POIs offer the same performance and are spatially close together, because this increases the probability with which the search result can be met.

According to the invention, this object is further achieved with a method for operating an information system, in particular an information system for road users, pedestrians and / or drivers of vehicles, which determines the probability with which one or more Route criteria and / or search results and / or route options can be met, considered for the determination of the preferred route. This applies to all route criteria / options, or search results subject to fluctuation, in particular stochastic fluctuations or their fulfillment is not foreseeable because current information is missing, such as opening hours.

It is advantageous if one of these variable route criteria and / or search results and / or route options is an arrival time, preferably in conjunction with a time and / or a travel time and / or a probability for good weather, for good road conditions, is a low risk of congestion and / or a low risk of accidents and / or a maximum travel time and / or consumption and / or maximum consumption, which is in particular the fuel consumption and / or energy consumption and / or maximum consumption, compliance with a predetermined Emissions, consumption of electricity, oil, oxygen, pollutant-reducing substances, etc.

It is also advantageous if a maximum value can be predetermined, which is to be maintained with a certain probability. The maximum value is indicated by the user or externally e.g. can be entered via an air interface.

In a further embodiment, it is expedient if the travel time or consumption variance and / or user profiles with the variances are preferably stored in the information system and / or provided via a data carrier and / or provided via an air interface and / or via statistical evaluation in the vehicle have been determined. If the variances depend on the time eg date, time of day and / or time of travel, then the variances are preferably taken into account at the time when the corresponding road section is expected to be used.

It is also expedient if the route is selected which has a high or the highest probability of compliance with the predeterminable route criteria, preferably the route with the highest probability is automatically selected by the system.

In a further embodiment, it is expedient if a selection of the routes taking into account the probability based on fixed criteria, such as fastest route with preferably 90% security or the highest probability to achieve a predetermined maximum travel time.

It is also expedient in one embodiment if the probability of compliance with the maximum travel time for route calculation can be predetermined or preselected or preselected, such as 90% as the default value. Here, the operator himself can enter the desired probability or can be preselected by a default.

In a further embodiment, it is advantageous if the user can select from various proposed routes, the routes in addition to the usual information (travel time, distance, ...) the security of compliance with the route search result and / or the maximum value and / or the route criterion at a fixed probability threshold of preferably 80% to 95%, wherein a user selection is preferably sought when no route has been determined, over which the target can be reached in the predetermined limits. In a further embodiment, it is expedient if the methods for route calculation and / or route selection can be combined with other calculation methods and / or offer or permit manual selection.

In one exemplary embodiment, it is also advantageous if user profiles (due to fluctuations / irregularities in the driving style / driving speed, stored per road class or traffic situation), attributed map data and / or data of a traffic message channel are used to select the routes based on given variances. These are used to determine the temporal variances of the individual route sections, such as roads. It is particularly useful if the determination of temporal variances based on data for each route and / or for similar routes. Thus, in an advantageous embodiment it may be advantageous if similar routes are in the same country and / or are in a similar urban or rural region and / or contain roads of similar road classes. As a result, due to a variance in one area, a variance in another area can be extrapolated or estimated.

In one embodiment, it is also particularly advantageous if the temporal variance is taken into account at the time at which the respective route section would be reached. For this purpose, it is advantageous if data of a traffic message channel are taken into account at times which lie in the future and to which the respective route section would be reached.

It is also expedient in one embodiment if the selection criterion between a plurality of routes or in the route calculation is the minimization of the variance. In a further exemplary embodiment of the invention, it is expedient if the selection criterion is between a plurality of routes or, in the route calculation, the limit value / maximum value.

In one exemplary embodiment, it may also be advantageous if an input of a user with regard to the maximum travel time and / or the probability of compliance with the maximum travel time is taken into account in the route calculation or in the selection of the route.

In one exemplary embodiment, it is expedient if, in the case of non-achievement of the route destination in the maximum travel time (maximum value / limit value), thus with a probability of 0%, either the best route and / or the fastest route is selected from the given route criteria and / or the user is informed and / or the user the various routes are offered for selection.

In one exemplary embodiment, it is expedient if, in the event of failure to reach the route destination to the default value of, for example, 90%, the route with the highest probability is selected and / or the user is informed.

In one exemplary embodiment, it is expedient if only one route which ensures that the route destination is reached in the maximum travel time (maximum value) with a probability of greater than the default value of 90%, for example, is selected.

In one exemplary embodiment, it is expedient for the user to be presented with the various routes for selection, stating the expected travel time, the distance, and / or the safety of maintaining the maximum travel time (maximum value). In one embodiment, it is useful if more than one route for reaching the route destination in the maximum travel time (maximum value) is determined with a probability of greater than the default value of, for example, 90%, the fastest and / or the shortest or a route with a optimal mix of these route criteria is selected among these routes.

The object according to the invention can also be achieved in one embodiment by a method for operating an information system in which routes are determined from map data and if a selection or calculation of a route takes into account probabilities for achieving the target within a predetermined travel time and the route is selected has the highest probability for the given route criterion (s) and / or search result (s) and / or route option (s).

It is also expedient in one embodiment if a route criterion is a journey time, a route and / or a mixture thereof. It is advantageous that the route criterion is subject to variance.

Also, in one embodiment instead of the travel time, the arrival time can be used, taking into account the current time.

Advantageously, the data is available via an air interface. In this case, data or criteria can also be forwarded from a server and / or a control unit to the information system. The data may be complete routes, variances, maximum travel times and / or thresholds. It is also expedient in one embodiment if the data can be stored in a memory of the information system and / or a server.

It is also expedient in one embodiment if the method for operating the information system is carried out independently on a server.

It may also be advantageous in one embodiment if the method for operating the information system in the information system itself is performed.

According to the invention, the object can also be achieved with regard to the method in an embodiment with a method for operating an information system with a main memory, possibly a memory receiving device for receiving a memory at least with a main memory for the map data and with an optional display element and optionally a control element the memory has map data which can be used in particular for route determination, wherein a specific route for route guidance is selected, whereby probabilities for fulfillment, compliance, arrival or usability of a calculated search result can be taken into account in the selection.

It is also expedient in one embodiment if the map data also have data of the probabilities for the variance of a use of road sections.

It is also advantageous in one embodiment if the device of the information system automatically selects between several routes based on the highest probability of reaching the target within the predetermined target achievement time. Furthermore, it is also expedient in one exemplary embodiment if the device displays a plurality of specific routes, so that the user can make a selection between the specific routes based on the highest probability of target achievement within the predetermined target achievement time.

According to a further inventive concept, it is advantageous if the criterion of the fast route is taken into account as well.

According to the invention, the object with regard to the information system is solved with an information system having a main memory, a data carrier receiving device for receiving a data carrier and with an optional display element and optionally a control element, wherein the data carrier for route determination has usable map data, wherein a specific route is selected for route guidance, wherein in the selection of probabilities for target achievement within a predetermined arrival time are considered.

According to a further aspect of the invention, in the case of a route search, the object is achieved by an information system, such as a navigation system that can be used in the vehicle or used as a mobile device outside the vehicle or on the PC as a SW program or route search on the Internet and a method for operating an information system in which a route is determined on the basis of map data, at least one start position indication and at least one destination specification and, if necessary, a route guidance is carried out which allows to minimize the probability of not complying with a calculated search result can. Here, in particular, the application of the method or information system according to the invention in the virtual area such as in the area of "second life" is provided. In one application example, the likelihood is minimized by a traffic jam to exceed the typical calculated time of arrival or maximize the likelihood of reaching the latest allowed time of arrival. The route can be calculated in the device or on a server and then downloaded into the device.

In this context, traffic disruption is understood as meaning any type of disturbance of the arrival of the typical travel time, such as red lights, railway gates, traffic jams, slow vehicles in front, which can be overhauled more or less easily, bad weather areas, etc.

In another application example, the likelihood of consuming more fuel by disturbing a fuel-efficient driving style, traffic congestion, or other adverse external conditions (weather) than that estimated for the route is minimized.

Furthermore, the object with regard to the data carrier is solved with a data carrier with data stored on the data carrier card data of a digital map, wherein the map data data of route segments, which are suitable for determining routes that are selectable for route guidance, with the selection of probabilities can be taken into account for achieving the target within a specifiable time of arrival.

It is advantageous if the data carrier is a CD, a CD-ROM, a DVD, a memory chip or any other data storage medium, which is preferably also writable.

For another form of search, namely methods of searching for points of interest, it is useful to consider probabilities of meaningful use of the POI. For example, the likelihood of having a train station at the appropriate time of arrival still usable train connections or the probability of reaching an open gas station, which is usually larger on the highway than in a village or open restaurants, reliable partners (eg of workshops), cheap Prices (eg of workshops or petrol stations at the same time great opening probability), good service, good opening hours, good food (eg at truck stops or normal restaurants) to find. Possible sources of such probabilities include statistics, ratings, reviews, reviews, etc.

In particular, it is useful to take into account the variances of opening hours, quality, cleanliness, equipment level (e.g., a workshop with diagnostic equipment), size (e.g., motel), reputation, goodwill, price, and / or price / performance, such sizes being e.g. be derived from evaluations.

Advantageous developments are described in the subclaims.

Brief description of the drawings

The invention will be explained in more detail on the basis of an embodiment with reference to the drawings. Show it:

Fig. 1 is a schematic representation of an inventive

Information Systems;

FIG. 2 is a diagram illustrating probabilities of various routes; FIG.

FIG. 3 is a diagram illustrating probabilities of various routes; FIG. 4 is a diagram illustrating probabilities of various routes;

Fig. 5 is a diagram illustrating probabilities of various routes;

Fig. 6 is a schematic representation of data of various

routes; and

Fig. 7 is a schematic representation of data of various

Routes.

Preferred embodiment of the invention

Information systems, as well as navigation systems, for example, use digital maps to represent the environment, to calculate routes for reaching a selected destination point starting, for example, from a current coordinate point of the vehicle in the map. For this purpose, for example, a destination coordinate is entered or defined, and based on the current coordinate, the information system determines, with the aid of an available digital map, for example, the most suitable route to the destination coordinate given any further boundary conditions specified. This route can then be reached by means of a route guidance.

1 shows an information system 1, such as a navigation system, in a schematic representation with a working memory 2, a display element 3, such as display, and at least one control element 4. The navigation system 1 is able to represent map representations and / or arrow representations on the display element 3, wherein For example, calculated routes can be displayed in a map display. In other variants, it is also conceivable that the inputs and outputs are acoustic, so that the display element can be omitted. Furthermore, the navigation system 1 has a data carrier recording device 5, by means of which a data carrier 6 can be provided or recorded on which digital map data are stored, it being conceivable that the data carrier is firmly integrated into the information system 1. It would also be possible for the map data to be provided via an air interface and then stored, if appropriate, directly in the main memory.

On the basis of the map data which are contained on the data carrier and / or can be loaded into the main memory, the information system determines at least one route proposal for achieving the predetermined destination on the basis of the method according to the invention for operating the information system.

If the information system can determine different routes between the current position or a start position and a destination position, a selection between the respective routes is necessary in order to offer the driver a route.

In the method according to the invention for operating the information system, consideration of a maximum travel time as a route selection criterion is carried out between different routes. For example, a route may have a typical travel time of 20 minutes, but statistically 10% of the time travel times of more than 30 minutes occur, such as due to high traffic in rush hour, unfavorably switched traffic lights, restricted level crossings or crossings difficult to cross. However, a second specific route may have a typical travel time of 22 minutes, but travel times of over 30 minutes occur only in about 1% of cases. In such cases, the method of operating the information system will recommend and guide the second route to the user wishing to safely reach his destination within 30 minutes at the latest. For a fixed appointment, the selection criterion "short route" is either not at all or only very weakly taken into account when selecting a route.

In the example above, the method considers the 30-minute time limit as the time of on-site arrival. Additional times for finding a parking space, check-in or logging in to the gatekeeper, etc. are to be considered by the user, which may mean that he actually has 45 minutes, but he plans 15 minutes to search for a parking space, so that he gives the information system a maximum travel time of 30 minutes pretends. Alternatively, the additional time can also be stored as a default value in the settings of the device, so that a time limit is taken into account, whereby the default value for all target types can be identical or variable depending on the target type and / or variable depending on the individual target is. For example, the additional time at airports with e.g. 60 minutes significantly greater than at stations with e.g. 15 minutes.

For example, if the user of the device has specified 45 minutes as the maximum travel time, then the device can subtract 15 minutes as a default value, so that the default for the route calculation is corresponding to 30 minutes.

In this case, a further extension can be made, so that the procedure for the "safety time" takes into account the walking distance of suitable parking garages to the destination and possibly takes into account the occupancy of parking garages. According to the invention, the maximum travel time is taken into account in such a way that for all possible routes to the destination the probability is determined of reaching this destination within the inputable maximum travel time. The route for which this probability is greatest is then selected accordingly.

This probability can be calculated, for example, from time variances that are stored in the device or in the data set of the digital map for each road segment together with an average speed or together with the transit time.

Preferably, these data may also be based on a personal driving profile of the user. Typically, this results in the probability of having traversed a certain distance A or B at a specific time tθ, a kind of Gaussian curve according to FIG. 2 on the left. Alternatively, there may be a histogram instead of a smooth curve. By integrating this probability, the probability results that the route A or B has traveled through until a certain point in time tθ. If the time tθ corresponds to the maximum travel time, then the route is selected in which the probability is greatest of having reached the destination at the time tθ.

In FIGS. 2 to 4, it is more favorable to select route B up to the maximum travel time t_A; from this point on it is better to select route A. However, as FIG. 5 shows, there may also be situations in which the time-variance-poorest route is so much slower that it is never favored over a time-variance-rich, faster route. As shown in Figure 4, for a particular embodiment, it is advantageous to combine the time variance criterion with a "fast route" criterion, namely, the advantage of Route A over Route B from time t_A is almost negligible because the destination is on both routes with the probability of achieving p = 99% on time. difference is in principle measurement noise during data collection. Therefore, in one embodiment, it may be advantageous if, from a certain safety threshold, for example, from 90% or 95% safety for a timely delivery over a distance, the faster the two routes is selected.

According to another idea according to the invention, it can also be advantageous in a further embodiment if the user or driver is also offered a plurality of routes for selection, the respective expected time of arrival and the probability of reaching the destination within a predetermined time.

In such a case, for example, at a maximum time of 30 minutes, the average travel time for a route may be 20 minutes, with 90% probability reaching the destination within 30 minutes. Alternatively, the average journey time is 22 minutes for another route, with 99% probability reaching the destination within 30 minutes.

Advantages of the invention are that the user runs or runs more relaxed, where he has more security to actually meet his appointments. Also, the user can avoid arriving unnecessarily early at his destination and having to wait there if necessary.

In one embodiment of the invention, the user has the option of specifying a maximum travel time or a latest arrival time. This can be specified manually and / or acoustically by means of a control element 4 of the information system 1. Alternatively, this arrival time may also be entered via an interface, such as via an air interface. For example, the arrival time can be set from the outside by a control center via an air interface. will give. For this purpose, a logistics center or an electronic diary can send the appointment. The destination can also be entered or specified via an interface.

The device calculates thereupon by means of the method according to the invention a route which does not exceed this travel time if possible. This is preferably done by taking into account time variances of routes and by disregarding or only very weakly weighted consideration of the calculation criterion "short route" for the different routes or routes to the destination.

According to a further embodiment, the device according to the inventive method can also offer a plurality of routes for selection, which have been determined or calculated using different route criteria and / or options.

A longer or, on average, slower route may be preferred if the likelihood of landing in a traffic jam on this route or being subject to other delays on that route is lower than on the average faster route. In particular, this involves the probability of being able to comply with the specifically required or predetermined maximum travel time.

According to a further aspect of the invention, the device according to the inventive method can offer the user a plurality of routes, wherein, in addition to or instead of the expected arrival time, it indicates the probability of having reached the destination for the given arrival time. The user can then select the more convenient or acceptable route for him based on an assessment of the risk of the delay. This is particularly useful if all calculated routes have a high probability of reaching the destination on time. or if all routes have a very low probability, possibly even the probability 0, to reach the destination on time.

In a further advantageous embodiment, the time variance is taken into account without specific maximum time input by the user and / or another control unit in the route selection. A weighting with respect to other route criteria and / or options can also be lower than in the case of a fixed maximum time. The user can then select from several specified routes.

A consideration of the time variance can be appropriate for both vehicles of any kind, such as for individually controlled vehicles and / or public transport, as well as for pedestrians.

Examples include the following: Pedestrian routes may be selected so that their duration barely varies, for example, bypassing overcrowded pedestrian passages and / or passing, for example, through a light traffic-free park to punctually reach the destination, such as a train station to reach.

Public transport can be chosen so that means of transport such as airplanes, trains and / or buses can be reached with high probability.

As an example, the following is chosen: You can drive from location A to location B via location C or via location D. However, the means of transport from A to C occasionally has such delays that the optimum connection transport means from C to B is not reached, but a later connection transport means must be used. The means of transport from A to D is much more reliable, so that the connection transporting means from D to B (almost) always achieved safely. This connection transport itself is only slightly delayed. Now if the rou- however, if the arrival via C is delayed, the route is selected via D, irrespective of the fact that the optimum time of arrival via C may be considerably earlier than the time of arrival via D.

In private transport, a route can be selected that avoids high time uncertainties at traffic lights, railroad crossings, in urban areas and / or on traffic jams, etc.

In a further advantageous embodiment of the invention, the time variances of the respective routes are displayed on a display unit of the device and / or by another human-machine interface (HMI). Alternatively or additionally, the maximum time together with the expected time of arrival in the HMI can also be displayed. Here, a 2 * Sigma value, o.a. displayed. Alternatively or additionally, instead of this maximum time, the predetermined maximum time can be displayed with the probability of reaching the destination within the specified time.

In the event that the device recognizes in accordance with the operation that the achievement of the target can no longer be realized reliably within the predefinable target attainment time, this can be displayed, such as by a display by means of the display device or otherwise. For example, a green / red display while driving can represent the endangerment of an appointment. Alternatively, an acoustic warning could also be given.

In a further development of the invention, the user has the option of predefining or adjusting the weighting of the time variance with respect to other route calculation criteria and / or options, eg via a slider or another input unit. However, it is advantageous if the variance is not weighted significantly more than the duration of the journey. In a further aspect of the invention it is furthermore advantageous if a special input possibility for so-called filling times between arrival at the destination and arrival at the actual appointment, for example of parking times, check-in times, porter times, etc. either for certain target categories (airports, Railway stations, company addresses, etc.) or for certain individual destinations (where, for example, the parking situation is exceptionally relaxed or particularly bad) exists. This makes it possible to spare the user the calculation of the pure driving time.

FIGS. 2 to 5 show how the likelihood of reaching the destination by a particular point in time is determined by the probability of reaching the destination at a certain point in time, see in each case the left side of FIGS. 2 to 5.

In this case, the two routes A and B are shown by way of example, with route B being the faster, but more variant route, route A being the slower, but low-variance route.

FIG. 2 shows on the left side a probability distribution for the achievement of the goal at a specific point in time t. The maximum value on route A is greater than the maximum value on route B, the standard deviation is smaller for route A than for route B. On the right side of FIG. 2 it can be seen that for a target attainment time for t less than t_A, the route B is preferable and from the time t_A the slower route A is to be preferred.

Figures 3 to 5 also show on the left side probability distributions for the goal achievement at a certain time t. The maximum value on route A is greater than the maximum value on route B, the standard deviation is smaller for route A than for route B. It can be seen that the destination via route B is usually reached even before the maximum value of A, and the trend is rising. It can be seen on the right side of FIGS. 3 to 5 that, for a target attainment time for t less than t_A, route B is to be preferred, and from time t_A the slower route A is to be preferred. In FIG. 4 and in particular FIG. 5, the probabilities of the low-variance route A are so unfavorable that route B would almost always be preferable.

Figures 6 and 7 show a mixture of functionality with the display of several driving recommendations. Figure 6 shows a display in which a first route I is displayed with a distance of 26 km, an average travel time of 22 minutes and a probability that the destination is reached in 99 minutes by 30 minutes. Furthermore, a second route Il is displayed with a distance of 30 km, an average driving time of 20 minutes and a probability that the destination is reached in 30 minutes by 90%. According to the invention, either the user can now choose between the two routes or the device selects the safer variant and selects route I.

FIG. 7 shows a display in which a first route I is displayed with a distance of 26 km, an average travel time of 22 minutes and a maximum travel time with a 90% probability of 24 minutes. Furthermore, a second route Il is displayed with a distance of 30 km, an average driving time of 20 minutes and a 90% probability of reaching the destination in 30 minutes. According to the invention, either the user can now choose between the two routes, or the device selects the safer variant and selects route I, because here the travel time is less with identical threshold probability.

In the figures 6 and 7, instead of the travel times in a further embodiment, an arrival time can be specified. Also, an input mask may be provided for a maximum travel time or a latest arrival time with or without consideration of, for example, a search for a parking space or a running distance.

Furthermore, it is also possible to provide an input mask for a predefinable standard safety time, for example as a parking space search time, which may also be dependent on target categories and / or individual destinations, for example.

Claims

claims

1. A method for operating an information system, in particular an information system for road users, pedestrians and / or drivers of vehicles, which takes into account in its search algorithms points, variables, states and / or situations that have variance, and / or the resulting probabilities for fulfillment, Indicates and / or presents compliance, arrival and / or usability of a calculated search result.

The method of claim 1, wherein the search result is a result of a search for a point of interest (POI)

3. The method of claim 1 or 2, wherein the varianzbehafteten sizes or states are opening times, quality, cleanliness, equipment level, size, reputation, goodwill, price and / or price / performance ratio.

4. A method for operating an information system, such as in particular an information system for road users, pedestrians and / or drivers of vehicles, the likelihood that one or more routes criticize and / or search results and / or route options can be met, for the determination of considered preferred routes.

5. The method according to claim 4, characterized in that a route criterion and / or search result and / or a route option is an arrival time, preferably in conjunction with a time and / or a travel time and / or a probability for good weather, for good road conditions, for a low risk of congestion and / or a low risk of accidents and / or a maximum travel time and / or consumption and / or maximum consumption is.

6. The method according to any one of the preceding claims, characterized in that the route is selected, which criteria to predeterminable routes and / or options has a high or the highest probability and / or that a maximum travel time and / or a maximum consumption predetermined by a user is that should be kept with a certain probability or that a maximum travel time z. B. is input via an air interface from the outside.

7. The method according to claim 6, characterized in that a selection of the routes taking into account the probability based on fixed criteria, such as fast route with preferably 90% security or the highest probability to achieve a predetermined maximum travel time.

8. The method according to any one of the preceding claims, characterized in that the user can select from various proposed routes and / or POIs, the routes and / or POIs information on the probability of fulfillment, compliance, usability and / or the arrival of a calculated search result at a fixed probability threshold of preferably 80% to 95%, wherein a user selection is preferably requested or sought when no rouge tenkriterium and / or search result and / or no route option was determined, in which the predetermined probability threshold was reached.

9. Method according to one of the preceding claims, characterized in that a travel time or consumption variance by at least one typical speed, a user profile, a speed distribution, a traffic message channel statistics (TMC statistics), a traffic statistics, such as a traffic flow, a travel time, Hydrographs and / or information about accident-prone routes, which data are preferably stored in the information system and / or provided via an air interface and / or have been determined by statistical evaluation in the vehicle, and wherein the variances are preferably taken into account at the time to which the corresponding road section is expected to be used.

10. The method according to any one of the preceding claims, characterized in that the method for route calculation and / or route selection can be combined with other calculation methods and / or offer or allow a manual selection.

11. Information system (1), in particular an information system for road users, pedestrians and / or drivers of vehicles, with a main memory (2), possibly a memory receiving device (5) for receiving a data carrier (6), possibly a data carrier, and with an optional display element (3) and possibly an operating element (4), the main memory having map data which can be used in particular for route determination, a specific route for route guidance being used is selected, wherein the selection probabilities for fulfillment, compliance, arrival or usability of a calculated search result are considered.