JP5096396B2 - Traffic information management server, navigation terminal and method - Google Patents

Description

  The present invention relates to a navigation field, and more particularly to a traffic information management server, navigation terminal, and navigation method that manage the provision of traffic information to a plurality of navigation terminals.

  A navigation terminal equipped with a current electronic map can perform a route search based on geographical information of electronic geographical information and traffic rule information on a medium such as an existing hard disk or DVD. By inputting the start point and the end point, the user can select a route based on the calculation result of the navigation terminal. In the course of navigation, the system tells the user the route to travel, such as which way of the intersection to travel to. Data used for route calculation is based on a database in an electronic map and is generally updated several times a year.

  However, in some cities under development, roads are frequently built, traffic rules change well, and POIs (landmarks that mark places such as buildings on the map) also change. With the traditional method of manual collection and update, it is impossible to provide the latest information to the user on the electronic map. Routes calculated by the navigation terminal based on these “old” information frequently cause inconvenience to the user, and incorrect instructions waste user time and money.

  To avoid the above situation, electronic map providers will update the map data more frequently by methods such as manual collection outside work, or ensure the data update frequency by forming a federation including government agencies. Must. However, this requires a lot of money and time, and not all map providers can do this.

  Therefore, there is a need to automatically collect, configure, and identify, and to provide the latest, reliable and detailed data to the navigation terminal.

  In US Pat. No. 6,516,267, “Method and System for Updating, Augmenting or Improving Geographic Databases with Feedback” of US Pat. In other words, the geographic database is discovered, updated, or augmented by the feedback information of the road detector. The feedback information includes a reliable degree of information, which indicates the degree of matching between the feedback information and actual geographic characteristics. However, this reliable increase or decrease in feedback information only considers the frequency of information source updates, not the results of navigation terminal users using the information. For this reason, a true user feedback process is not included. Therefore, the accuracy and reliability of information cannot be ensured by such a method of collecting and updating information substantially in one direction.

  Some sites offer open services. For example, http://www.poihandler.com provides users with free or paid update data, which is used for sharing on different navigation terminals. Yes. These “contributions and rewards” models have become very widespread on the Internet, but it is very difficult to provide users with guaranteed reliability. Even if users have problems using these updates, the feedback process is often voluntary and uncontrollable, and users can provide feedback in a timely and accurate manner. It is extremely difficult to obtain.

  Toyota Mapmaster presented a paper on the technology to keep the map data updated with the data of the measurement vehicles at the Nagoya ITS World Congress. There, a kind of algorithm is explained, and one-way traffic or traffic prohibition is judged by combining traffic signals and data of measuring vehicles. However, as shown here, the accuracy of the measurement data of the in-vehicle system affects the reliability of the update data. It is necessary to confirm the place where the map and data do not match by field survey, and this still takes time and effort.

US Pat. No. 6,516,267

  An object of the present invention is to provide a traffic information management server to provide a platform for exchanging one piece of information to a plurality of navigation terminals, and to exchange various types of traffic information such as POI, road information, and traffic regulations in a timely manner. Is to be able to.

  Another object of the present invention is to provide a method used for collecting, checking, and providing traffic information to a navigation terminal to ensure not only the timeliness of traffic information but also the reliability of information. is there.

  Another object of the present invention is to provide a system in which a user can perform feedback and evaluation on updated traffic information through a navigation terminal.

  In one aspect of the present invention, a traffic information management server that manages the provision of traffic information to a plurality of navigation terminals is proposed. The traffic information management server includes the following units.

(1) Interface unit:
Through this interface unit, communication is performed between the network and a plurality of navigation terminals.

(2) Storage unit:
A traffic information database for storing and managing traffic information from a plurality of information sources is stored. The traffic information database includes traffic information provided to the navigation terminal, reliability information of the traffic information, and a position ID indicating a position of the traffic information on a map.

(3) Control unit:
Upon receipt of the traffic information request message from the navigation terminal, the location ID on the route route of the moving body, the traffic information corresponding to the location ID, the reliability information, etc. are extracted from the traffic information database. Generate a traffic message, control the interface unit, and send the traffic information request message to the navigation terminal.

  In another aspect, the present invention proposes a navigation terminal that searches for a route from a starting point to an end point of a moving object and guides the moving object, and includes the following.

(1) Display unit:
Traffic information is displayed based on the searched route.

(2) Interface unit:
The interface unit connects the navigation terminal and the traffic information management server, sends a traffic information request message of the requested traffic information on the route to the traffic information management server, and sends the traffic information request message on the route from the traffic information management server. Receive traffic messages containing traffic information.

(3) Storage unit:
A traffic information management chart composed of the traffic messages on the route is stored. The traffic information management chart includes traffic information, reliability information of the traffic information, and a position ID indicating a position of the traffic information on the map.

(4) Control unit:
Based on the traffic information management chart, the display unit is controlled to display the reliability information corresponding to the position ID on the searched route.

  In yet another aspect, the present invention proposes a traffic information management method for managing the provision of traffic information to a plurality of navigation terminals, which includes the following steps.

  (1) A step of receiving a traffic information request message from the navigation terminal.

  From the traffic information database, the position ID on the route via the moving body, the traffic information corresponding to the position ID, the reliability information corresponding to the traffic information, and the like are extracted to generate a traffic message.

  (2) A step of transmitting the generated traffic message to the navigation terminal.

  In still another aspect, the present invention proposes a navigation method for searching for a route from a starting point to an end point of a moving object and guiding the moving object, and includes the following steps.

(1) Sending a request message to the traffic information management server:
A traffic information request message of traffic information on the requested via route is transmitted to the traffic information management server.

(2) Step of receiving a traffic message:
A traffic message including traffic information on the route is received from the traffic information management server.

(3) Step of displaying reliability information:
By referring to the traffic information management chart composed of the traffic message on the route, the traffic information corresponding to the position ID on the searched route route and the reliability information corresponding to the traffic information are displayed. To do. Among these, the traffic information management chart on the route includes the traffic information, the reliability information of the traffic information, and the position ID indicating the position corresponding to the traffic information on the map of the traffic information.

  In a preferred embodiment of the present invention, information is obtained from road vehicles including taxis, route buses, private vehicles, etc., or detectors including induction coil sensors, cameras, microwave sensors, ultrasonic sensors, or road construction statuses, Collected from government agency information systems, including changes in traffic rules.

  In a preferred embodiment of the present invention, a traffic information management server is responsible for configuring and checking these enormous data in order to ensure the accuracy of traffic information randomly generated by road vehicles and detectors.

  The check algorithm is, for example, as follows. First, check the source of information. If the customer is a public or authoritative route, such as a government announcement or a highly reliable customer, the information is more reliable. If the data comes from a new route, a check process is required that includes the data format, certification image, and user feedback. If the data passes this checking process, the reliability of the information can still be set high. The reliability ranking process is rigorous and can be changed by feedback of the evaluation through the user's navigation terminal.

  After the updated traffic information is checked, the data is stored in the traffic information management server and is available for user download. In the traffic information management server database, data is stored in different categories. This includes each region and each data category such as traffic rules and POI.

  Traffic information is downloaded by distributed service. This is because when the amount of information is expected to be enormous, the distributed service can more efficiently meet the user's download needs.

  In users' navigation terminals, including embedded navigation terminals, portable navigation terminals, PDAs and smartphones, update data is downloaded to the terminal system via radio, mobile phone network, or other network and displayed to the user in a suitable format. The To make it possible to provide as many update data as possible to various terminals, the data format can be set to XML (Extensible Markup Language) or other languages to facilitate analysis on the terminal. It is.

  According to a preferred embodiment of the present invention, traffic information is collected from a plurality of different routes, timeliness and freshness of information are ensured, and traffic and geographical information on the road is grasped in a timely and comprehensive manner. ing.

  In addition, according to a preferred embodiment of the present invention, traffic information is checked and identified by a traffic information management server, ensuring accuracy and accuracy of the information, and the user can use it with peace of mind.

  Furthermore, according to a preferred embodiment of the present invention, the distribution of traffic information is efficient and quick. The user can not only obtain the update information from the traffic information management server, but also directly download it from other users who have already downloaded some or all of the update information. Maximum sharing of traffic information is useful for users to know the latest traffic related information and prepare for going out.

  Other objects and features of the present invention will be clarified in the embodiments described below.

It is the schematic of the structure of the traffic information management server by one Example of this invention. It is the schematic of the structure of the control unit in the traffic information management server by one Example of this invention. 1 is a schematic diagram of a structure of a traffic information database stored in a storage unit in a traffic information management server according to an embodiment of the present invention. FIG. It is a flowchart at the time of traffic database update in the traffic information management server by one Example of this invention. 1 is an example of a structural diagram of a navigation terminal that interacts with a traffic information management server according to an embodiment of the present invention. 4 is a flowchart of an interaction between a traffic information management server and a navigation terminal according to an embodiment of the present invention. It is a flowchart of another example which exchanges and updates traffic information by performing the exchange operation | work between the traffic information management server and navigation terminal by one Example of this invention. It is a flowchart which checks the road information from a measurement vehicle or a detector by one Example of this invention. It is one example of the vehicle-mounted navigation terminal with the information exchange function by one Example of this invention. 4 is an example of a traffic message format download according to an embodiment of the present invention; It is description of the parameter used as the conditions of the upload of the traffic feedback information of the vehicle by one Example of this invention. It is one example of the traffic feedback information uploaded from the navigation terminal according to an embodiment of the present invention.

  FIG. 1 is a structural diagram of a traffic information management server according to an embodiment of the present invention. The traffic information management server 104 obtains the latest geographic and / or traffic information from a plurality of information sources such as the government agency information system 101, road information collection system 102, site and other information system 103. The acquired information is ranked based on the reliability of information, that is, the degree of reliability. The traffic information management server 104 includes a storage unit 105, a control unit 106, and an interface unit 107. Among these, the storage unit 105 is used for storing a traffic information database that manages traffic information from a plurality of information sources. The traffic information database includes a plurality of traffic information management charts, traffic information provided to the terminal by the traffic information management chart, reliability information corresponding to the traffic information, and the traffic information indicating a position of the traffic information on a map The position ID corresponding to is included. Of these, the traffic information can include information such as traffic rules, POIs, traffic accidents, and road works.

  The interface unit 107 is used to provide an interface function, and performs communication between the network and a plurality of navigation terminals through the interface unit. The control unit 106 receives a traffic information request message from the navigation terminal. Then, the position ID on the route via the moving body, the traffic information corresponding to the position ID, the reliability information corresponding to the traffic information, and the like are extracted from the traffic information database. At the same time, a traffic message is generated, and the traffic message is transmitted to the navigation terminal through the interface unit 107. The navigation terminal 108 receives a traffic message transmitted from the traffic information management server 104. The navigation terminal 108 also performs feedback evaluation on the traffic information provided from the traffic information management server 104 as an information feedback route, and provides the traffic feedback information to the traffic information management server 104. When the interface unit 107 receives traffic feedback information from a plurality of the navigation terminals, the control unit 106 applies the reliability information corresponding to the position ID in the traffic information management chart based on the received traffic feedback information. Update.

  Next, how to obtain reliability information corresponding to traffic information will be briefly described. When the data is obtained from the information system 101 published by the government agency, the reliability of the information is the highest, for example, 5 stars. If the information is obtained by the road information collection system 102, the information, including taxis, route buses, induction coil sensors, cameras, etc., is evaluated as four stars after processing, and expressed as relatively high reliability. However, it needs to be supported by more feedback information. When the quantity of positive feedback information exceeds a certain ratio (for example, 50%), the reliability of the updated information is raised to five stars. If the data is obtained from the site and other information system 103, the reliability can be three stars and the information is expressed as having a certain reliability, but other routes, such as measuring vehicles or A cross check with the information from the induction coil sensor is required. The above contents are explained by showing an example of how to obtain the reliability information. In addition, the reliability information can be obtained by other methods such as statistics. Only after the update information is proved by feedback will its reliability be improved. The reliability of the traffic information updated in this way is not constant, but constantly changes according to feedback from the user.

  When the traffic information management chart needs to be updated, the storage unit 105 updates the traffic information in the traffic information management chart that needs to be updated, such as road conditions, traffic conditions, and POI. Different information is placed on different types of charts.

  FIG. 2 is a schematic diagram of the structure of the control unit 106 in the traffic information management server according to an embodiment of the present invention. Since the traffic information has different collection routes, if the traffic information is different, it must be processed by different processing units. The control unit 106 in the traffic information management server 104 includes the following systems and units. First, there is an image recognition processing system 205 used for processing image information 201, a text analysis processing system 206 used for processing text information 202, and a road information processing system 207 used for processing road information 203. Further, an update unit 208 used for updating the traffic information database, a traffic message generation unit 209, and a feedback information processing unit 210 are included.

  When the update data is image information 201, the image recognition processing system 205 automatically performs recognition processing based on pattern information included in the image. When the update data is the text information 202, the text analysis processing system 206 performs analysis processing based on the keywords included in the text. When the data format is GPS or other road information 203, the road information processing system 207 performs processing based on the critical data included in the information. Data to be processed later is stored in the storage unit 105. If the image information 201 is clear and includes geographical position information such as an intersection name, the figure and characters on the traffic sign are recognized and stored as traffic rule information. The text information 202 is filtered by keyword search. For example, if it is “left turn restriction”, it is stored as traffic rules together with the geographical position information. The road information 203, GPS data from the vehicle, or other data obtained from the detector can analyze the traffic flow situation including the direction of travel, maximum speed, route, and the like. If a new road or a new traveling direction is found by the analysis, the traffic information database in the storage unit can be updated using the update unit 208 through conversion of the data format. If there is feedback information later, after checking the information, the feedback information processing unit 210 increases its reliability and stores it as new geographic information in the database. When the traffic message generation unit 209 receives a request from the navigation terminal, the traffic message generation unit 209 extracts, from the traffic information management chart, the position ID on the route route of the moving body, the traffic information corresponding to the position ID, the reliability information, and the like. Generate traffic messages. The feedback information processing unit 210 updates the reliability information corresponding to the position ID in the traffic information management chart based on the received traffic feedback information.

  Obviously, the control unit 106 may include only the traffic message generation unit 209 or only the traffic message generation unit 209 and the feedback information processing unit 210.

  FIG. 3 is a schematic diagram of the structure of a traffic information database stored in a storage unit in a traffic information management server according to an embodiment of the present invention. In the traffic information database of the storage unit 105, each traffic information is arranged based on a position ID code (for example, road link number, intersection number, POI number, etc.) on the map. Each traffic information is divided into a plurality of categories (for example, traffic rules, POIs, traffic accidents, road conditions, etc.) and stored in different types of charts. The main data is the contents of the traffic information, and the traffic information receiving user categories and their reliability information divided by the contents and categories of the traffic information. Here, the contents of the traffic information include, for example, left turn restrictions at certain intersections, and the traffic information receiving user category includes, for example, all persons, private cars, commercial vehicles, public vehicles, pedestrians, bicycles, For example, the reliability information includes five stars and four stars. When the management server receives the traffic information request message transmitted from the navigation terminal, the management server searches the data based on various conditions based on the fields in the traffic information database through communication with the storage unit 105 through the control unit 106. Then, corresponding traffic information in the traffic information database is extracted, and a traffic message is generated and sent to the navigation terminal. An example of a traffic message to download is illustrated in FIG.

  FIG. 4 is a flowchart when the traffic database is updated in the traffic information management server according to the embodiment of the present invention. First, the control unit 106 converts the traffic information data format for each route of different information sources, unifies it into one prescribed exchange format, and stores it in the traffic information database of the storage unit 105. All the traffic information in the traffic information data chart is arranged based on the position ID, the information content, and the reliability information, and the content of each ID is unique for each category of information. The reliability of each piece of information is not constant and changes with the quantity of information sources and feedback.

  If multiple information sources occur on the same location ID, the system maintains the information content unchanged if the information content is the same, and the reliability of the information is the highest among the information sources. Set to rank. As an example in which a plurality of information sources are generated on the same position ID, there is a case where both the government agency and the road information collection system have traffic regulation information for a road. If the information is different, the system first compares the reliability information of the old and new information, changes the information content if the new information is highly reliable, otherwise temporarily changes the existing information content Keep it as it is. At the same time, the inspection and measurement of new information of the position ID is continued, and when the quantity of information different from the conventional information content reaches a certain level (for example, the ratio to the total quantity of information exceeds 50%), Change the content of the information and correct its reliability information. The principle in the modification of reliability information is based on selecting the most reliable information source and relying on changes in user feedback using that information. When the positive feedback reaches a certain quantity, for example, if it exceeds 50% of the total feedback, the reliability is raised by one rank. On the other hand, when negative feedback reaches a certain percentage, for example, when it exceeds 50% of the total feedback, the reliability is lowered by one rank.

  FIG. 5 shows a structural diagram of a navigation terminal that interacts with a traffic information management server according to an embodiment of the present invention. The navigation terminal includes a display unit 21, an interface unit 22, a storage unit 23, and a control unit 24. Among these, the display unit 21 is used to display traffic information based on the searched route. The interface unit 22 provides an interface function, connects the navigation terminal and the traffic information management server, and transmits a traffic information request message of the requested traffic information on the route to the traffic information management server. The interface unit 22 is also used for receiving a traffic message including traffic information on the route via the traffic information management server. The storage unit 23 is used for storing a traffic information management chart constituted by the traffic message on the route. The traffic information management chart includes a traffic ID, reliability of the traffic information, and a position ID corresponding to the traffic information for indicating a position of the traffic information on a map. The control unit 24 is used for controlling the display unit based on the traffic information management chart and displaying the reliability information corresponding to the position ID on the searched route.

  Next, a flowchart of how the traffic information management server executes traffic information management with the navigation terminal by combining FIG. 1, FIG. 2, and FIG.

  FIG. 6 is a flowchart of an interaction between the traffic information management server and the navigation terminal according to an embodiment of the present invention. First, in step 601, the traffic information management server 104 receives a request for traffic information from one or a plurality of navigation terminals 108 through the interface unit 107. In step 602, based on the request from the navigation terminal, the control unit 106 stores the position ID on the route route of the moving body, the traffic information corresponding to the position ID, the reliability information corresponding to the traffic information, etc. in the traffic information database. Extract more and generate traffic messages. In step 603, the traffic information is transmitted to the navigation terminal 108 through the interface unit 107. After receiving the information message through the interface unit 22, the navigation terminal 108 stores the traffic message in the storage unit 23 as a traffic information management chart composed of the traffic message on the route. Accordingly, the display unit can display the reliability information corresponding to the position ID on the searched via route. When the feedback information is transmitted from the navigation terminal 108, in step 604, the traffic information management server 104 receives the feedback information. Then, in step 605, the control unit 106 updates the reliability information corresponding to the position ID in the traffic information database, but ends if there is no transmission of feedback information.

  FIG. 7 is a flowchart of another example of exchanging and updating traffic information by executing an exchange operation between the traffic information management server and the navigation terminal according to an embodiment of the present invention.

  The flow starts when the user is at the starting point of the journey. The first route calculation is completed on the local side of the navigation terminal. When a route list from the start point to the end point is generated, the list is transmitted to the traffic information management server 104 through a wireless communication network (GPRS, CDMA, WiMAX, etc.). When the traffic information management server 104 searches the traffic information database of the storage unit 105 based on the list and finds the presence of updated traffic information, the traffic information management server first checks the category of the information. In the case of POI information, the route calculation result is not affected. In the case of traffic rule information, the restricted route is sent back to the navigation terminal, and the navigation terminal has to calculate the route again and transmit it again to the traffic information management server for checking. The most reasonable driving route can be found by the information exchange function of the navigation terminal and the traffic information management server used by the user. After starting the navigation, the user can select whether to turn on the feedback function of the navigation terminal 108, and can also default the feedback status (active or sleep) in advance. When the feedback function is turned on, the GPS data record automatically starts recording and route matching. When the user reaches the destination and finishes the navigation of that time, the navigation terminal 108 automatically displays a list of matching results. Generate. At the same time, the data is transmitted to the control unit 106 of the traffic information management server through the interface unit 22. Thereby, it is possible to further check the reliability of the update information according to the process of the user. If there is no matching failure, the traffic information management server 104 raises the rank of the reliability information of the update information. When there is a road that fails to match, the system issues a request to the user to input the cause of the matching failure by text or voice interface, or reports it to the center through an in-vehicle image system that performs automatic recognition. If it is proved that the updated information is incorrect, the traffic information management server reduces the reliability of the information. For example, when driving without following the navigation route or suddenly changing the destination, the user himself / herself is the cause of the matching failure. In such a case, the navigation terminal returns one cause unknown to the traffic information management server 104 through the interface unit 22, and the traffic information management server 104 abandons the feedback result of that time.

  FIG. 8 is a flowchart for checking road information from a measuring vehicle or detector according to an embodiment of the present invention. When the collected information is, for example, a vehicle on a road such as a measuring vehicle, the traffic information management server can generate information such as the maximum speed, the traffic direction, and the travel route based on the GPS data. By statistically analyzing and calculating the rate of exceeding a certain speed limit in a certain time zone, for example, when the ratio exceeds 40%, the traffic information management server sets the speed limit for the road. It can be inferred that there would have been a change. By analyzing and judging the traveling direction and the traveling route, the traffic information management server can know which one is prohibited from turning, which road is closed, or one-way. Measurement car data analysis not only relies on the vehicle's travel direction, position and speed at a certain time, or route matching on a map of a certain vehicle, but also other information such as the average speed range, travel direction, and vehicle type. It relies on the regularity of action every 5 minutes and every 24 hours. This is because many traffic rules have restrictions due to time zones and restrictions according to vehicle type. By these methods, mistakes and one-sidedness when the in-vehicle system itself calculates can be avoided as much as possible.

  When the collected information is from a detector installed on the road, the traffic information management server analyzes the traffic flow in each detection range by the method of statistical analysis, finds the characteristics of the traffic flow on the road, A traffic situation change situation can be generated. Examples of the detector installed on the road in this case include an induction coil sensor, a camera, a microwave sensor, and an ultrasonic sensor. The maximum speed and traveling direction of the vehicle can be determined by an induction coil sensor installed on the roadway. The situation of the turning direction can be determined by the lane with the road direction sign. For example, at a certain intersection, it is detected that one small vehicle has passed through the leftmost lane from the west to the east, and a vehicle approach is detected even in the lane closer to the center from the north to the south within one signal cycle A vehicle made a left turn from west to south within the blue time at this intersection. Further, the determination of the travel route can also be analyzed by tracking and photographing the license plate with a camera.

  FIG. 9 is an example of an in-vehicle navigation terminal having an information exchange function according to an embodiment of the present invention. The navigation terminal, the camera 404 for photographing the front of the vehicle on the board in the vehicle, and the wireless communication antenna 405 used for uploading and downloading data are connected to each other. Two examples are shown on the navigation map screen 401. In Example 1, the vehicle 1 is running toward the intersection 1 and is turning left and going to the destination A. However, the navigation terminal received the updated information just after it was obtained, and displayed that it is prohibited to turn left at this intersection. The warning information is displayed on the download information screen 403 at the lower right, and has three star reliability information. This reliability information is update information that has just been obtained from a certain information route, and indicates that support from another information route has not yet been obtained. Once supported, the reliability of the information is continuously raised to higher ranks. Thereafter, the navigation terminal automatically recalculates the route, instructs the driver to turn right, makes a U-turn at intersection 2, returns straight to intersection 1, and arrives at destination A. In this example, the update information can be downloaded by connecting to the database of the center server at the starting point when the user starts the process. Also, when approaching the update point, it can be automatically downloaded from the network and the center server to the navigation terminal and presented to the user. Which method to adopt and update depends on the actual system and user situation.

  In Example 2, the vehicle 2 is running toward the intersection 2 and goes straight to the destination B. However, it was discovered here that there is a traffic sign indicating that entry is prohibited at the entrance of the road ahead by the in-vehicle camera. The road with destination B was a one-way street. For this reason, the driver made his own judgment based on this situation, turned left at the intersection 2 and made a detour to reach the destination B. At this time, the update information just discovered is automatically uploaded to the center server through the navigation terminal and the wireless network, and reports the latest situation of the road where the destination B is located. The reported data includes image information collected by the camera and position information at the intersection 2 of the vehicle 2. The update information is displayed on the upload image screen 402.

  FIG. 10 is an example of a traffic message to be downloaded according to an embodiment of the present invention. The traffic message includes a header, code, length, location ID, data category, user category, reliability information, information content, and other information. The header is used for synchronization of packet communication. The code is used for a packet number such as an order of divided packets. The length is the length of the packet. The position ID represents a position on the map corresponding to the traffic message, and examples include a road link number and an intersection number. The data category is the type of information, and includes traffic rules, POI, road construction, traffic incidents, and the like. The user category is a classification of message recipients and includes all persons, private cars, commercial vehicles, public vehicles, pedestrians, and bicycles. The reliability information represents a rank of the update information that is reliable. For example, five stars indicate that the reliability information is the highest, and if the number is reduced, the reliability information is corresponding. The user can determine the degree of reliability of the information based on the reliability of the information. The information content is the main content of the traffic information. This includes the specific information updated at that time. The navigation terminal can directly read the data and use it for route calculation. The other fields are communication fields reserved by the system as spares.

  FIG. 11 is a diagram illustrating parameters that serve as conditions for uploading vehicle traffic feedback information according to an embodiment of the present invention. This upload condition is a parameter list used when a vehicle equipped with an in-vehicle navigation terminal performs feedback and exchanges information. This includes the following:

(1) Vehicle category:
Vehicle categories include private cars, taxis, local buses, public cars, and trucks. This is because information such as traffic rules and vehicle categories are often related.

(2) GPS recording status:
The GPS recording state includes ON / OFF of a recording function of a GPS module that records a travel route of the vehicle.

(3) Result list of route search and map matching:
In the result list of route search and map matching, “1” is matching success and “0” is matching failure. It also includes a location ID.

(4) Cause of matching failure:
Types of causes of unsuccessful matching include road closures, road traffic restrictions, turn restrictions, lane restrictions, lane closures, traffic accidents, and other causes.

Update feedback:
Update feedback can be correct, failed, still unknown, or unchecked. Feedback is uploaded to the center by input from the user or navigation terminal.

(5) Feedback method:
The feedback method includes an image and a text. In the image method, feedback data automatically recognized by a navigation terminal equipped with a photographing device is used. The feedback information is uploaded and stored in the storage unit of the traffic information management server in the center through the interface unit and the control unit, and is used for checking the reliability of the update information.

  FIG. 12 is an example of traffic feedback information uploaded from the navigation terminal according to an embodiment of the present invention. The format of the traffic feedback information uploaded from the navigation terminal is similar to the downloaded traffic message format shown in FIG. 10, and the contents correspond to the parameters as the traffic feedback information upload conditions shown in FIG. That is, the header, code, length, position ID, data category, user category, cause of mismatch, feedback information, and the like are included. The header is used for synchronization of packet communication. The code is used for a packet number such as an order of divided packets. The length is the length of the packet. The position ID represents a position on the map corresponding to the traffic feedback information, and examples include a road link number and an intersection number. The data category is the type of information, and includes traffic rules, POI, road construction, traffic accidents, and the like. The user category is the classification of the person who uploads the message, and includes private cars, taxis, route buses, public cars, and trucks. The cause of the mismatch is an explanation of the cause of the matching failure, which includes no matching failure (that is, all are correct), road closure, road traffic restriction, and the like. The feedback information is the main content of the traffic feedback message, and includes correct, incorrect, still unknown, and unchecked. Other fields are reserved by the system.

  DESCRIPTION OF SYMBOLS 101 ... Government agency information system, 102 ... Road information collection system, 103 ... Site and other information systems, 104 ... Traffic information management server, 105, 23 ... Storage unit, 106, 24 ... Control unit, 107, 22 ... Interface unit , 108 ... navigation terminal, 201 ... image information, 202 ... text information, 203 ... road information, 205 ... image recognition processing system, 206 ... text analysis processing system, 207 ... road information processing system, 208 ... update unit, 209 ... traffic Message generation unit, 210 ... feedback information processing unit, 21 ... display unit.

Claims (12)

A traffic information management server that manages the provision of traffic information to a plurality of navigation terminals,
An interface unit that performs communication between the network and a plurality of navigation terminals,
A storage unit that stores traffic information provided to the navigation terminal, reliability information of the traffic information, a traffic information database including a position ID indicating a position of the traffic information on a map, and a traffic information request from the navigation terminal When the message is received, the position ID on the route route of the moving body, the traffic information corresponding to the position ID, and the reliability information are extracted from the traffic information database, and a traffic message is generated, and the interface A control unit for controlling the unit and sending the traffic message to the navigation terminal ;
The reliability information of the traffic information is set based on the type of information source of the traffic information,
The interface receives traffic feedback information from the plurality of navigation terminals, and the control unit is positive for the reliability information corresponding to the position ID in the traffic information database based on the received traffic feedback information. A traffic information management server that increases reliability when negative traffic feedback information reaches a certain percentage, and updates it with reduced reliability when negative traffic feedback information reaches a certain percentage . 3. The traffic feedback information according to claim 1 , wherein the traffic feedback information includes the position ID, correct / incorrect information indicating a comparison result between the traffic information and an actual road condition, and mismatch reason information indicating a cause when the correct / incorrect information is incorrect. A traffic information management server characterized by this. 3. The traffic information management server according to claim 2 , wherein the traffic feedback information further includes notation of moving body classification information of a moving body on which the navigation terminal is mounted. A display unit that displays traffic information based on the searched route from the start point to the end point of the moving object,
An interface unit for sending the requested traffic information request message to the traffic information management server and receiving a traffic message including traffic information on the route from the traffic information management server;
A storage unit configured to store a traffic information management chart including traffic information, reliability information of the traffic information, and a location ID indicating a location of the traffic information on a map, on the route, and the traffic based on the information management chart, and controls the display unit, a control unit for displaying the reliability information corresponding to the location ID of the route through which search for the said display unit,
The reliability information of the traffic information is set based on the information source of the traffic information in the traffic information management server, and positive traffic feedback information is obtained based on the traffic feedback information received from a plurality of navigation terminals. When it reaches a certain percentage, it increases the reliability, and when negative traffic feedback information reaches a certain percentage, it is updated with a reduced reliability,
The storage unit stores an actual road condition based on the position ID of the mobile body,
The navigation terminal according to claim 1, wherein the control unit compares the traffic information with an actual road condition based on the position ID, generates the traffic feedback information, and transmits the traffic feedback information to the traffic information management server . 5. The navigation according to claim 4 , wherein the traffic feedback information includes the position ID, correct / incorrect information indicating the result of the comparison, and mismatch reason information indicating a cause when the correct / incorrect information is incorrect. Terminal. 6. The navigation terminal according to claim 5 , wherein the traffic feedback information further includes notation of moving body classification information of the moving body. A traffic information management method for managing provision of traffic information to a plurality of navigation terminals,
Receiving a traffic information request message from the navigation terminal;
Extracting from a traffic information database a position ID on a route via a moving body, traffic information corresponding to the position ID, and reliability information corresponding to the traffic information, and generating a traffic message ;
Setting the reliability information of the traffic information based on the type of information source of the traffic information
When,
Receiving traffic feedback information from a plurality of navigation terminals;
Based on the received traffic feedback information, when the positive traffic feedback information reaches a certain ratio with respect to the reliability information corresponding to the position ID in the traffic information database, the reliability is increased, and the negative A traffic information management method comprising: a step of reducing reliability and updating when traffic feedback information reaches a certain ratio . 8. The traffic feedback information according to claim 7 , wherein the traffic feedback information includes the position ID, correct / incorrect information indicating a comparison result between the traffic information and an actual road condition, and mismatch reason information indicating a cause when the correct / incorrect information is incorrect. A traffic information management method comprising:   9. The traffic information management method according to claim 8, wherein the traffic feedback information further includes a notation of moving body type information. A navigation method for searching a route from a starting point to an end point of a moving object and guiding the moving object,
Sending a traffic information request message on the requested via route to the traffic information management server;
A step of receiving a traffic message including traffic information on the route via the traffic information management server, and a location ID on the route searched by referring to a traffic information management chart comprising the traffic message on the route Displaying the traffic information corresponding to the traffic information and the reliability information corresponding to the traffic information,
The traffic information management chart on the route has a traffic ID, reliability information of the traffic information, and a position ID indicating a position corresponding to the traffic information on the traffic information map ,
Setting reliability information of the traffic information based on a type of information source of the traffic information;
Comparing the traffic information with actual road conditions based on the location ID, generating traffic feedback information and providing it to a traffic information management server;
When positive traffic feedback information reaches a certain percentage of the reliability information corresponding to the position ID based on the traffic feedback information received by the traffic information management server, the reliability is increased and negative traffic A navigation method, comprising: a step of updating by reducing reliability when feedback information reaches a certain ratio . 11. The traffic feedback information according to claim 10 , wherein the traffic feedback information includes the position ID, correct / incorrect information indicating the result of the comparison, and mismatch reason information indicating a cause when the correct / incorrect information is incorrect. How to navigate. 12. The navigation method according to claim 11 , wherein the traffic feedback information further includes notation of moving body classification information of the moving body.

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