Classifications

• • 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
  • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
  • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
  • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/091—Traffic information broadcasting
  • G08G1/093—Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output
• • 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
  • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
  • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
  • G08G1/096775—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a central station

Definitions

• the invention relates to a method for the selection and filtering of traffic information, preferably for use in a mobile radio-based traffic information service.
• the basis is a mobile radio-based one
• Traffic information service such as in the GSM mobile radio network Dl within the framework of computer-aided traffic telematics services.
• traffic information should also be able to be called up via the mobile radio network, which can be received and displayed by a corresponding terminal, which is equipped, for example, according to the "IntraGSM" industry standard.
• the object of the invention is to propose a method for the selection and filtering of traffic information, by means of which information which is individually prepared and only relevant for the user is transmitted.
• An essential feature of the invention is that the user is given a choice between a plurality of traffic information modes, so that he can call up the traffic information that is most interesting or directly relevant to him.
• the traffic data can be filtered in such a way that out of a multitude of traffic information only those reach the user that are important to them.
• the traffic information service provides the user with three modes, which he can select as required: 1. Local traffic information (Lok)
• Selecting modes 1 and 2 requests information from the immediate vicinity of the user's location. Via the selection “local” or “regional”, the user defines the relative size of the area over which he wants to receive traffic information, as well as priorities / focal points when selecting information.
• the 3rd mode allows the user to query targeted traffic information, i.e. matched to his direction of travel or his destination. For this purpose, the user selects a destination by means of a module “TARGET INQUIRY” under communication with the service center. The coordinates of the destination are to be transmitted to the terminal as part of the destination request. The user can select the destination in his digital “ Store address book "in the terminal. Telephone prefixes or postcode regions (numbers 1 + 2 of the postcode) can also be entered as the destination. Based on the current location and the destination, an individual reference range for the traffic information is determined in the headquarters. The relevant traffic information is transmitted from the head office to the vehicle via a GSM mobile network.
• the information is displayed as text on the display of the prepared terminal. With a scroll function, the user can see the individual
• the user can activate a voice output in the query menu for traffic information or in the basic configuration menu. If this function is active, the relevant traffic information is also recorded in voice form on a voice mailbox and can thus be called up by the user.
• the voice mailbox automatically informs the user of the presence of new messages. The user then initiates the query of the mailbox.
• the traffic information is collected and processed in the traffic department of the service center.
• the available information (data records) are sorted and made available according to a geographical grid (partial areas) in order to enable a quick and easy query.
• the data records contain information on the type, priority and direction vector of the fault, as well as geographical information on the fault.
• a target address TARGET POSITION is also required, which is either determined by the service center by determining in which radio cell of the mobile radio system the user is, or is determined by a GPS location system that is integrated in the terminal or vehicle and transmits the exact position data to the service center.
• the size of the reference area to be assigned i.e. the number of sub-areas (grid squares) about which traffic information is to be provided depends on the density of the (long-distance) road segments that exist in the area of the START-POSITION.
• the selected information is transmitted in data form to the vehicle-side terminal.
• the traffic information is converted into voice form and transferred to a voice mailbox.
• voice output is activated, the traffic information is converted into voice form and transferred to a voice mailbox.
• a grid (e.g. 10 km x 10 km) is shown on the digital map. Every single grid square is a
• the size of the reference area is calculated with PVD, whereby the reference areas are larger in rural areas than in urban areas.
• the traffic density parameter PVD can be assigned as follows:
• conversion parameters for direction vectors can be specified for the grid squares, in order to be able to take geographical features into account when filtering the information later (see below).
• the traffic information is stored as data records in the database of the traffic department. This record contains:
• the data records are each assigned to one or more (if large-scale disturbances) grid squares.
• the basis for the selection of information consists of all available actual information and forecast data for the next few hours. This information is assigned to the affected grid squares in a database. Basically, information of all detail zones (highways to urban area) can be processed, since filtering functions are defined and therefore there is no danger of "flooding with information”.
• Figure 1 Example of the menu structure of the terminal-side application of the traffic service
• Figure 2 Example of a possible hardware implementation of the method according to the invention
• FIG. 3B flowchart of a vehicle traffic service query
• Figure 4 Example of determining the reference range of information in the "local” and “regional”mode
• Figure 7 Example of filtering the information in the "vek” mode.
• Figure 1 shows an example of the menu structure of the terminal-side application u.
• the main menu offers the option "V-Info" to select the traffic service.
• the "V-Info" submenu opens and you can choose between three area modes, according to local, regional or targeted traffic information. If the targeted information is selected, the desired destination must be entered in the "Destination" selection menu. This can be done by specifying the destination coordinates, a corresponding telephone number or the postcode of the destination.
• the traffic information is output as text or, if desired, as voice information.
• FIG. 1 shows the application environment of the
• Traffic information service In a service center, in which the user-specific database is located and which is responsible for the billing of the services used (billing), a traffic editorial office is provided according to the invention, in which the traffic information from various sources accumulates, is processed and processed.
• the traffic data are linked to a digital map and assigned to individual geographical "grid squares" on this map.
• Via a user module "V-Info" the traffic data can be queried by the road user via the GS mobile radio network become.
• the query and the exchange of information is controlled by a communication server, which establishes the connection between the telecommunications system at the headquarters and the GSM system or the vehicle. If the user desires a voice output, the traffic information is spoken onto the voice mailbox using a voice generator, and can then be called up / listened to by the user via his terminal.
• FIGS. 3A and 3B show a flowchart of a vehicle service traffic query.
• the user is guided through the traffic information query via his end device with the aid of a menu guide.
• the flow chart is self-explanatory and gives detailed insights into the menu structure and its links as a supplement to the rough overview in Figure 1.
• Traffic info menus choose between three modes (see figures).
• the exact size of the environment or reference area should not be fixed. Instead, the relative terms “local” and “regional” are used.
• the exact size of the reference area to be queried is calculated in the control center. With this method, the determination of the reference range is made more comfortable and effective than a fixed km specification. It is thus possible to adapt the size of the reference area to the traffic density of the area of residence: in rural areas, for example, the area queried with “local” is larger than in conurbations.
• the traffic information request received at the headquarters includes:
• VImod ?; lok, reg, vek
• the starting square (grid map) and the associated traffic density parameter PVD are determined from the START POSITION.
• Vlmod query mode
• the parameter PVD of the grid square also influences the size of the reference area in order to take the traffic density into account when determining the size of the reference area.
• the STARTING POSITION is in one
• the reference area is not placed symmetrically around the starting grid square, but offset towards the TARGET POSITION.
• the TARGETING POSITION is southeast of the starting position.
• the information in the reference area is checked for redundancy.
• the system can rule out multiple answers based on the reference numbers assigned to each individual traffic information record.
• the determined reference ranges consist of individual grid squares. Current traffic information from the traffic department is assigned to these grid squares.
• FIGS. 5 and 7 describe how the traffic information is further filtered, taking into account the direction vectors. This is to ensure that the user receives only the information that is relevant to him and, for example, no information that is intended for the opposite direction.
• filtering data a distinction is made between the local / regional modes and the targeted mode vek.
• centrifugal direction In the "local” and “regional” modes, no basic direction vector is specified and therefore it is only possible to filter according to the "centrifugal direction", ie primarily traffic information is taken into account, the direction vector of which is seen from the position of the vehicle point outwards. In the starting grid square, information with all direction vectors must therefore be taken into account. In the surrounding grid squares of the reference area, the centrifugal directions, based on the starting grid square, can be used to filter the information (see Fig. 5). This filtering is limited to a range of approx. 90 ° to the left and right of the centrifugal direction vectors, ie to a total of 180 °, so that tolerances due to geographic road patterns can be included.
• the known travel destination which corresponds to a specific target grid square, specifies a basic direction vector according to which it is possible to filter.
• the start grid square information with all direction vectors must be taken into account.
• the superordinate direction vector based on the target grid square, is used to filter the information (see Fig. 7)
• This filtering is limited to a range of approximately 90 ° to the left and right of the direction vector, that is to say a total of approximately 180 °, so that tolerances due to geographically determined road courses that deviate from the theoretical direction of travel can be included.
• the filtered information of the reference area is output as data records.
• each data record also contains the position of the respective fault in order to enable the position-dependent and direction-dependent display of the information in the vehicle's end device (automatic mode).
• the position can be a point or a geometric figure.
• the output message (TINFO_response) is generated from the data records and transferred to the communication server together with the subscriber identity (T-ID).
• TINFO_response If, after generation of the output message (TINFO_response), new important messages for the reference area arrive within a defined period, these should be passed on to the user.
• a speech generator used a speech generator with a standard vocabulary. In special cases, the text of information can also be spoken by an operator.

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• 1996
  • 1996-07-22 DE DE19629233A patent/DE19629233C2/de not_active Expired - Fee Related
• 1997
  • 1997-07-21 WO PCT/DE1997/001531 patent/WO1998003951A1/fr active IP Right Grant
  • 1997-07-21 AT AT97935443T patent/ATE205322T1/de active
  • 1997-07-21 AU AU38461/97A patent/AU3846197A/en not_active Abandoned
  • 1997-07-21 DE DE59704555T patent/DE59704555D1/de not_active Expired - Lifetime
  • 1997-07-21 DK DK97935443T patent/DK0939945T3/da active
  • 1997-07-21 ES ES97935443T patent/ES2163794T3/es not_active Expired - Lifetime
  • 1997-07-21 EP EP97935443A patent/EP0939945B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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