JP3861422B2 - Information exchange system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information exchange system, and more particularly to an information exchange system that has a database on the center side, performs route search using the database, and transmits route data to a mobile unit.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a navigation system that obtains route data to a desired destination by accessing an external service center using communication such as a mobile phone, and uses this data to guide a route in a vehicle, for example, JP-A-2-206900. In such a system, the route data depends on the database on the center side, so there is no need to have a database on the vehicle side, the hardware is simplified, and the latest map database can be used. is there.
[0003]
[Problems to be solved by the present invention]
However, in order to perform data transfer by communication, there is a problem that the data transfer capability is limited or communication is interrupted during data transfer. In addition, in order to respond to the departure from the provided route and the update of route information accompanying changes in traffic conditions, connect to the center again, reconfigure, and obtain route data again. Because things become necessary, it is troublesome and troublesome for the driver.
[0004]
Therefore, the present invention has been made in view of the above-mentioned problems, and it is possible to efficiently provide information even if the response at the time of departure and traffic conditions change without disturbing the driver. Is a technical issue.
[0005]
[Means for Solving the Problems]
The technical means taken to solve the above problems is to perform position detection with a mobile body, and the mobile body outputs its location information and a route request to the destination to the center using a line. The center performs a search using the database of the center for the route request, and transmits the route data obtained by the search to the mobile unit.
When the mobile unit is regarded as a departure from the current position with respect to the route data transmitted from the center, the mobile unit is automatically connected to the center, and the mobile unit is used for identification. ID, and re-route request together with the current position data and outputs it to the center, the center performs a search based on the identification ID, is intended to send the new route data to the mobile, further wherein the path Data is blocked and transmitted from a block close to the current position of the mobile unit, and the center adds an identification ID to the route data transmitted to the mobile unit and holds it for a certain period of time . .
[0006]
With the above configuration, when the mobile unit leaves the route data, the mobile unit is automatically connected to the center, and the mobile unit outputs a re-route request to the center together with the identification ID and current position data, The center performs a new search based on the identification ID and transmits new route data to the mobile unit. For this reason, automatic processing for re-searching is performed, and the driver is not bothered.
[0007]
In addition, since route data is blocked and transmitted from a block closer to the current position of the mobile unit , route data can be divided and transmitted, and transmission is performed more efficiently by transmission from a block closer to the current position. Is possible.
[0008]
Furthermore, centers for is to hold a certain time by adding the identification ID to route data transmitted to the mobile, it is possible to retransmit the route data based on the identification ID.
[0009]
Furthermore, if new traffic information is input from the external traffic information center at the center and there is a moving body that is affected by the traffic information in the stored route data, the center will automatically respond to the corresponding moving body. If the connection is made and the route data based on the traffic information is searched based on the current position information from the mobile body and transmitted to the mobile body, the route data based on the information from the traffic information center is obtained. Since the information is provided to the mobile body, the center can search for route data corresponding to the traffic state that changes every moment, and can provide this mobile device with this accurate route data.
[0010]
In addition, the mobile unit checks whether the route data received for a certain period of time is received in the route data received. If no data is received for a certain period of time, the route data is transmitted to the center. If requested, partial transmission can be performed without transmitting all the route data, so that efficient data transmission can be performed.
Further, the center may add an identification ID for each piece of blocked data when transmitting route data to the mobile body.
In addition, when the mobile unit requests a partial block, the center confirms the identification ID and the requested block number, searches for data corresponding to this, and transmits the necessary block to the mobile unit. Also good.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 shows a system configuration diagram of the present invention. A service center (hereinafter referred to as a center) 4 that provides information such as route information to a mobile body (here, a vehicle) 2 and a plurality of vehicles 2 is connected via a telephone exchange 6 and a cellular telephone base station 3. Connected by public line. The center 4 continuously receives traffic information from the external traffic information center 51, and can provide the latest road information based on the road conditions that change every moment.
[0013]
FIG. 2 shows a configuration of the vehicle-mounted device 7 provided in the vehicle 2. The vehicle-mounted device 7 has a GPS antenna 21 that receives a signal from a GPS satellite, and a GPS that is connected to the GPS antenna 21 and measures a current position. A receiver 22, a cellular phone 24 that connects to the center 4 via a public line and transmits / receives digital data via the cellular phone antenna 23, a speaker and microphone for voice conversation, a controller 25 having a voice synthesis circuit 27, A display 22 that displays various information such as a position or a message, a microphone 19 that receives the voice of the driver, a speaker 30 that conveys the output of voice synthesis to the driver, and a service switch 15 that makes a request to provide information such as a route to the center , Emergency switch 14 to inform the outside of the emergency situation, ON / OFF switch for voice switching It is equipped with a 6. Among them, the speech synthesis circuit 27 and the display 20 are used for route guidance in navigation.
[0014]
The service switch 15 is used for the purpose of establishing a communication connection to the center 4 in order to perform a route guidance service, a road service, an information providing service, and various reservations. When the switch 15 is pressed, the LED lamp built in the upper part of the switch blinks and is connected to the center 4. Thereafter, connection to the center 4 is made, and when the telephone becomes ready, the light is switched on. When the service is completed, the light is turned off and the telephone connection is disconnected.
[0015]
The emergency switch 14 is a switch to be pressed in an emergency, and the operation is the same as that of the service switch 15, but it is connected to an emergency response window in the center 4 and is received with high priority.
[0016]
The ON / OFF switch 16 is a switch for turning on / off voice output (navigation guidance, information output, etc.).
[0017]
In such a configuration, in the event of an emergency such as theft or accident, the emergency switch 14 is pressed to automatically connect to the center 4 and the vehicle ID and vehicle position data are periodically transmitted to the center. At this time, a conversation with the center-side operator is possible.
[0018]
When a service request is made to the center 4, the service switch 15 is pressed to automatically connect to the center 4, and the vehicle ID and vehicle position data are periodically transferred to the center, and a conversation with the operator is performed. Is possible. Information services can be obtained by making various service requests through conversation with the operator. For example, in the case of navigation, when the destination is notified to the operator, the destination is searched on the center side, the guide route data from the current location is searched, and this is sent to the vehicle side. When the route data is received, the guidance operation is automatically started. To stop this, the ON / OFF switch 16 may be pushed.
[0019]
Next, the service center 4 will be described with reference to FIG. The center 4 has a map database 54 inside, and is provided with a computer 44 for performing destination search and route search using this database information. It is connected to the traffic information center 51 at the time of route search and has a traffic information memory 52 so that the latest traffic information can be reflected, and the data is constantly updated by information sent from the traffic information center 51.
[0020]
On the other hand, a plurality of terminal devices 41, 42,... 43 for receiving service information from the vehicle 2 are connected to the computer 44, and for each input service or emergency service request, vehicle ID, position confirmation, Send and receive data. In this case, an operator (not shown) is attached to each terminal, and a request can be transmitted by speaking with the operator through voice conversation. Each terminal device 41, 42,... 43 is connected to a public line. The route data DT is transmitted to the requesting vehicle 2 and then an identification ID (ID1 to IDm) is added, and the search result is stored in the memory 53 for a certain time (for example, 1.5 times the total process time). ) Accumulated and stored in a format that allows split transmission or retransmission.
[0021]
When the route data DT is transmitted from the center 4, the route data DT is divided into a plurality of blocks (BK1 to BKN) as shown in FIG. 4, and a data ID, a block number, and a byte of the data portion are provided for each block. The number, data part, and CRC code for error check are added and transmitted. In this way, by dividing into blocks and attaching additional data, if the data transfer is interrupted or if an error occurs, the remaining data is transferred again, or the vehicle memory overflows, It can be sent later.
[0022]
Next, the configuration of the route data DT transmitted from the center 4 will be described with reference to FIG.
[0023]
Before that, a route search is performed on the center side, and the route data DT obtained by the route search is composed of a plurality of guide points (maneuver points MP) existing between the departure point and the destination and the road shape data SP. (See FIG. 5A). From this data, a guidance message can be output for each guidance point MP * (*: 1 to 4), map matching is performed from road shape data SP *, a position on the route is calculated, and a guidance point is determined. Can do.
[0024]
The transmission data (route data) DT from the center 4 shown in FIG. 5B is roughly composed of header data HDT and a plurality of guide data (guide data 1 to guide data N) GDT.
[0025]
The header data HDT is composed of the total number of data bytes, the number of guide points including the starting point and the destination, the total distance from the starting point to the destination, and the total travel time. The guidance data GDT is composed of message data including a basic style, guidance point position coordinates including latitude / longitude, segment road distance, segment travel time, road attribute, guide point shape, and road shape data. Further, the road shape data RDT includes road point number M and latitude / longitude information (X *, Y *) of the road shape data.
[0026]
Next, processing of the vehicle-mounted device 7 on the vehicle side will be described with reference to the flowchart of FIG. In the vehicle-mounted device 7, when an ignition switch (not shown) is turned on, power is supplied to the controller 25 and the program is started. First, in step S101, the in-vehicle device 7 is initialized, and in step S102, the current position (current location) is detected based on the signal received by the GPS receiver 22. In the next step S103, it is checked whether the emergency switch 14 has been pressed and turned on.
[0027]
When the emergency switch 14 is on, a command to connect to the center 4 is output to the cellular telephone 24 in step S104, and the connection with the center 4 is confirmed. In step S105, the current position data and the vehicle ID from the GPS satellite 10 are confirmed. In addition, vehicle information and the like are periodically transmitted every 2 seconds until the emergency switch 14 is turned off. When the emergency switch 14 is turned on in step S106, the process returns to step S105, and during this time, the driver can talk with the operator on the center side and can transmit the requirements. Thereafter, in step S107, when the emergency switch 14 is turned off, the line is disconnected and the process returns to step S102.
[0028]
On the other hand, if the emergency switch 14 is off, and the route data DT is registered in step S108, the travel position on the route is determined by map matching with the current position, and the guide point MP on the route data is designated in front. At the timing of passing the distance point, a guidance message is displayed by voice synthesis display or the like. Thereafter, in step S109, the received route data DT is checked, and it is checked whether there is data from the current point to the designated time ahead (several tens of minutes) by the segment travel time. If there is no previous data, step S109 is performed. In S117, the communication connection to the center 4 is established. In step S118, the data ID, the vehicle ID, and the insufficient block number are transmitted. In step S119, the corresponding route data (after the insufficient block number) is transmitted from the center 4, Thereafter, the line with the center 4 is disconnected in step S123, and the process returns to step S102.
[0029]
On the other hand, if there is previous data in step S109, a route departure check is performed in step S110. As shown in FIG. 7, this route departure check detects a state in which the planned route is not found in the area of radius R centered on the current location as a result of the map matching, as a result of the map matching. . As a result, in the case of a route leaving state, after communication connection to the center 4 in step S120, the vehicle ID and the current position data are transmitted in step S121, the route search is performed again on the center side, and then the route search is performed. After the obtained route data is received in step S122 and reception from the center 4 is completed, the line with the center 4 is disconnected in step S123, and the process returns to step S102.
[0030]
If the route has not left in step S110, it is further checked in step S111 whether there is an incoming call from the center. If there is an incoming call from the center 4, a route change service accompanying a change in traffic information is received from the center 51. Since the situation is provided, the data ID and current position data are transmitted in step S121, the route search is performed at the center, the route data is received in step S122 as a result, and the line is disconnected in step S123. .
[0031]
On the other hand, if there is no incoming call from the center 4 in step S111, in step S112, it is checked whether or not the service switch 15 for requesting information provision to the center is pressed. If it is off, the process returns to step S102. However, in step S113, the vehicle is connected to the center 4, and in step S114, the vehicle ID and the current position are periodically transmitted until route data DT is received from the center 4 in step S115. During this time, similarly, the driver and the operator have a conversation, and the operator operates the terminal based on the driver's request to prepare various data. Then, the various data are transmitted to the vehicle, and after receiving the data on the vehicle side, the line with the center 4 is disconnected and the process returns to step S102.
[0032]
Next, the processing of the center 4 will be described with reference to FIG. Although processing on the center side is diverse, only the part related to transmission / reception of route data DT with the vehicle 2 will be described here.
[0033]
When the operation of the computer 44 in the center 4 starts and the program processing is started, it is checked in step S201 whether there is a route request from the vehicle 2 after the initial processing. If there is a request for the route data DT in step S202, it is further checked whether it is a new route request, a remaining partial block request for existing data, or a re-search request for a deviation from the route. This can be determined by a request code issued from the vehicle 2.
[0034]
In the case of new, after the current location and destination are determined in step S209 (implemented by the operator), a route search is performed in step S210, and a new data ID is assigned in step S211 and held in the search result memory 53. In step S219, the transmission is performed. In step S220, the line is disconnected, and the process proceeds to step S207. When a partial block is requested, the data ID (path ID) and the requested block number are confirmed in step S212, the corresponding data is searched from the search result memory 53 (see FIG. 3) in step S213, and the designated block is specified in step S219. Thereafter, the line is disconnected, and the process proceeds to step S207. Further, when a re-search request is made, the current location and route ID (data ID) are confirmed in step S215, the corresponding route data is extracted from the search result memory 53 in step S216, and the route search is performed again in step S217 using this, step S218. Then, this is replaced with old route data and stored, and transmitted to the vehicle 2 in step S219. When the transmission is completed, the line with the vehicle 2 is disconnected in step S220, and the process proceeds to step S207.
[0035]
On the other hand, if there is no route data request in step S202, the traffic information incoming check is checked in step S203. If new information is received, the influence on the storage route is checked in step S204. It is checked whether there is any path data DT that is affected. Therefore, when there is affected route data DT, in step S206, communication connection is sequentially established to the vehicle 2 using the data, and the current position of the vehicle 2 is confirmed by the information from the vehicle 2 and re-established. A route search is performed, route data obtained by the route search is stored and held, and transmitted to the vehicle 2. After that, in step S207, the time of the storage path is always checked, and a time exceeding a certain time (1.5 times the total process time is used as a reference time) is deleted. The process returns to step S202 and the above processing is repeated. .
[0036]
【effect】
According to the present invention, position detection is performed by a mobile body, and the mobile body outputs its location information and a route request to a destination to the center using a line, and the center responds to the route request. On the other hand, in the information exchange system for performing the search using the database possessed by the center and transmitting the route data obtained by the search to the mobile body,
When the mobile unit is regarded as a departure from the current position with respect to the route data transmitted from the center, the mobile unit is automatically connected to the center, and the mobile unit is used for identification. ID, and re-route request together with the current position data and outputs it to the center, the center performs a search based on the identification ID, is intended to send the new route data to the mobile, further wherein the path The data is blocked and transmitted from a block close to the current position of the mobile unit, and the center adds an identification ID to the route data transmitted to the mobile unit and holds it for a certain period of time . For this reason, automatic processing for re-searching is performed, and the driver is not bothered.
[0037]
In addition, since route data is blocked and transmitted from a block closer to the current position of the mobile unit , route data can be divided and transmitted, and transmission is performed more efficiently by transmission from a block closer to the current position. Is possible.
[0038]
Furthermore, centers for is to hold a certain time by adding the identification ID to route data transmitted to the mobile, it is possible to retransmit the route data based on the identification ID.
[0039]
Furthermore, if new traffic information is input from the external traffic information center at the center and there is a moving body that is affected by the traffic information in the stored route data, the center will automatically respond to the corresponding moving body. If the connection is made and the route data based on the traffic information is searched based on the current position information from the mobile body and transmitted to the mobile body, the route data based on the information from the traffic information center is obtained. Since the information is provided to the mobile body, the center can search for the route data corresponding to the traffic state that changes every moment, and can provide this mobile device with this accurate route data.
[0040]
Moreover, the mobile unit checks whether the route data received for a certain time is received in the route data received. If the data for a certain time is not received, the route data is transmitted to the center. Therefore, even if the entire route data is not transmitted, it is possible to transmit partially, so that efficient data transmission can be performed.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of an information exchange system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of the vehicle-mounted device in the moving body in the information exchange system in the embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration at a center in the information exchange system according to the embodiment of the present invention.
FIG. 4 is a diagram showing an outline of transmission data (path data) from a center in the information exchange system according to the embodiment of the present invention.
FIG. 5A is a diagram showing an overview of route data guide points and road shape data, and FIG. 5B is a data format of transmission data (route data) from the center.
FIG. 6 is a flowchart showing processing on the mobile unit side in the information exchange system according to the embodiment of the present invention.
FIG. 7 is a diagram showing an outline of departure determination in the information exchange system according to the embodiment of the present invention.
FIG. 8 is a flowchart showing the processing of the center in the information exchange system according to the embodiment of the present invention.
[Explanation of symbols]
1 Information exchange system 2 Mobile body (vehicle)
4 Center (Service Center)
51 Traffic Information Center 52 Traffic Information Memory 53 Search Result Memory 54 Map Database (Database)
DT route data BK1, BK2, BK3, BKn blocks

Claims (5)

Position detection is performed by a mobile body, and the mobile body outputs its position information and a route request to a destination to the center using a line, and the center has the center in response to the route request. In an information exchange system that performs a search using a database and transmits route data obtained by the search to a mobile unit,
When the mobile unit is regarded as a departure from the current position with respect to the route data transmitted from the center, the mobile unit is automatically connected to the center, and the mobile unit is used for identification. ID, and re-route request together with the current position data and outputs it to the center, the center performs a search based on the identification ID, is intended to send the new route data to the mobile, further wherein the path The data is blocked and transmitted from a block close to the current position of the mobile unit, and the center adds an identification ID to the route data transmitted to the mobile unit and holds it for a certain period of time. Information exchange system. In the center, new traffic information is input from an external traffic information center, and when there is the moving body affected by the traffic information in the route data that is held, 2. The information exchange system according to claim 1 , wherein automatic connection is made from the center side, route data based on traffic information is searched based on information on a current position from the mobile body, and transmitted to the mobile body. In the route data received by the mobile unit, it is checked whether route data of a certain time ahead is received. If data of a certain time ahead is not received, the route data is transmitted to the center. The information exchange system according to claim 2 to request. The information exchange system according to any one of claims 1 to 3, wherein the center adds an identification ID to each of the blocked data when transmitting the route data to the mobile body. The center, when the mobile unit requests a partial block, confirms an identification ID and a requested block number, searches for data corresponding thereto, and transmits a necessary block to the mobile unit. The information exchange system as described in any one of thru | or 4.

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