JP2011089839A - Information communication device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information communication device for vehicle which can reduce troublesomeness imposed on a user by not missing the original guided route as much as possible although the frequency of the information communication to a base station is increased. <P>SOLUTION: An onboard communication terminal 1 generates a recommended route RR from a starting place to a goal GL by layered Dijkstra's algorithm, and also generates a modified route MR which is costlier than the recommended route RR and in which many road side communication machines can communicating with an information communication center 2 are installed. Here, when the route from the starting point ST to the goal GL is generated, the greater is the priority of the transmitting and receiving data between the information communication center 2, the easier is the modified MR to be selected in place of the recommended route RR. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle information communication device, and more particularly to a vehicle information communication device including an in-vehicle wireless communication terminal that performs information communication with a communication base station.

  Conventionally, as an information communication device for a vehicle including an in-vehicle wireless communication terminal that performs information communication with a communication base station, an emergency of a vehicle that performs wireless communication with the base station using a communication device mounted on the vehicle. There is a communication device (see, for example, Patent Document 1). The emergency communication device for a vehicle guides the host vehicle to a wireless communication enabled region when communication with the base station is required outside the wireless communication enabled region for the base station, and the host vehicle is set to the wireless communication enabled region. When it arrives, information communication is performed with the base station.

JP 2007-65838 A

  However, in the emergency communication device for a vehicle disclosed in Patent Document 1, for example, even when the vehicle is traveling along a normal guidance route, When it is determined that communication with the base station is necessary, the vehicle is always guided to the wireless communicable area to increase the frequency of information communication with the base station. For this reason, for example, even when the necessity of the information determined to be necessary for communication with the base station is low, the information is guided to the wireless communicable area outside the normal guide route. Therefore, there are many cases where the normal guidance route is not removed unnecessarily, and there is a problem that it is bothersome for a user such as a driver.

  Accordingly, an object of the present invention is to provide information on a vehicle that can reduce the annoyance given to the user by preventing the departure of the original guidance route as much as possible while increasing the frequency of information communication with the base station. It is to provide a communication device.

  An information communication device for a vehicle according to the present invention that has solved the above problems is an information communication device for a vehicle that performs wireless communication between an in-vehicle wireless communication terminal mounted on the vehicle and a base station, and the first information A first guide route generating means for generating, a second guide route generating means for generating a second guide route having a higher passing cost than the first guide route based on a communicable range of the communication base station, and a route through which the vehicle passes Vehicle passage route selection means for selecting from the first guide route and the second guide route, the vehicle passage route selection means, the priority of information communication communicated between the in-vehicle wireless communication terminal and the communication base station The higher the is, the easier it is to select the second guide route.

  In the vehicle information communication apparatus according to the present invention, the higher the priority of information communication communicated between the in-vehicle wireless communication terminal and the communication base station, the higher the passing cost than the first guide route, and the communication base station The second guide route generated based on the communicable range is easily selected. For this reason, for information with low priority, the second guide route is less likely to be selected for transmission / reception with the communication base station. Therefore, while increasing the frequency of information communication with the communication base station, it is possible to prevent the first guide route that is the initial guide route from being deviated as much as possible. Therefore, it is possible to transmit / receive data to / from the communication base station with respect to important information while reducing the burden on the user.

  Here, an individual priority acquisition unit that acquires an individual priority according to the type of information communication communicated between the in-vehicle wireless communication terminal and the communication base station is provided, and the vehicle passage route selection unit acquires the individual priority. It can be set as the aspect which determines a priority based on each individual priority of the information communication acquired by the means.

  As described above, the priority can be easily determined by determining the priority based on the individual priority of each information communication acquired by the individual priority acquisition unit.

  The information communication storage means further includes individual priority storage means for storing individual priority data set in advance for each information communication communicated between the in-vehicle wireless communication terminal and the communication base station. The acquisition unit can acquire the individual priority based on the individual priority data stored in the individual priority storage unit.

  Thus, by acquiring the individual priority based on the individual priority data stored in the individual priority storage means, the individual priority can be easily and reliably acquired.

  Furthermore, when there are a plurality of information communications communicated between the in-vehicle wireless communication terminal and the communication base station, the priority of the information communications may be determined according to the individual priorities of the plurality of information communications. it can.

  As described above, when there are a plurality of information communications, the priority of the information communications is determined based on each individual priority, so that the vehicle route can be selected in consideration of the priority of the entire information communications. .

  The in-vehicle wireless communication terminal includes a plurality of wireless communication units having different communication capabilities, and the vehicle passage route selection unit includes the urgency level of information communication communicated between the in-vehicle wireless communication terminal and the communication base station, and The route through which the vehicle passes can be selected according to the type of wireless communication means for performing wireless communication with the communication base station.

  Thus, the route through which the vehicle passes according to the urgency of information communication communicated between the in-vehicle wireless communication terminal and the communication base station and the type of wireless communication means for performing wireless communication with the communication base station Can be selected. For this reason, for example, information that is desired to be transmitted to the communication base station as soon as possible can be transmitted at the base station as soon as possible using other wireless communication means with high communication costs. Information that is not high can be communicated by low-cost wireless communication means or the like.

  According to the vehicle information communication apparatus of the present invention, the frequency of information communication with the base station is increased, and the initial guidance route is prevented from being deviated as much as possible, thereby reducing the troublesomeness given to the user. Can do.

It is a block block diagram of the information communication apparatus of the vehicle which concerns on 1st Embodiment. It is the map which media DB memorizes. It is a map stored in the data priority DB. It is explanatory drawing for demonstrating the outline | summary of the function of an information communication center. It is a flowchart which shows the process sequence of a deviation degree determination process. It is a flowchart which shows the procedure of a signal transmission / reception process. It is explanatory drawing for demonstrating the relationship between a recommendation path | route and a correction path | route. (A) is an explanatory diagram for explaining a recommended route and other routes between a departure point and a destination, (b) is an explanatory diagram for explaining a search area around the recommended route, and (c) is a recommended one. It is explanatory drawing explaining the correction path | route produced | generated based on the path | route.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. For the convenience of illustration, the dimensional ratios in the drawings do not necessarily match those described.

  FIG. 1 is a block diagram of a vehicle information communication apparatus according to an embodiment of the present invention. As shown in FIG. 1, the vehicle information communication apparatus according to this embodiment includes an in-vehicle communication terminal 1. The in-vehicle communication terminal 1 includes a short-range wireless communication function unit 11, an Internet communication function unit 12, an information management function unit 13, a route guidance function unit 14, a location / time function unit 15, and a user interface (hereinafter referred to as "UI") unit. 16 is provided. The in-vehicle communication terminal 1 includes a transmission / reception waiting temporary database (hereinafter referred to as “DB”) 17, a communication area DB 18, a media DB 19, and a data priority DB 20.

  This in-vehicle communication terminal 1 transmits and receives signals to and from an information communication center 2 that is a base station. Furthermore, a diagnosis sensor 3 for performing a fault diagnosis of the vehicle is connected to the in-vehicle communication terminal 1. On the other hand, the information communication center 2 is provided with a vehicle state management DB 21 and an Internet connection unit 22.

  The function of the in-vehicle communication terminal 1 is realized by, for example, an ECU (Electronic Control Unit) (not shown) that is an electronic control device mounted inside the vehicle and a car navigation system. Further, the ECU is configured with a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory) and the like as main components.

  The short-range wireless communication function unit 11 in the in-vehicle communication terminal 1 is a communication management device that transmits and receives signals to and from other vehicles by inter-vehicle communication. The signal transmitted / received here includes transmission / reception information scheduled to be transmitted to the information communication center 2 and transmitted / received to / from other vehicles.

  The Internet communication function unit 12 transmits transmission information received by the short-range wireless communication function unit 11 and transmitted to the information communication center 2 and receives reception information provided from the information communication center 2. It is a communication management device that is performed by using. Transmission / reception processing of transmission / reception information in the Internet communication function unit 12 is performed when the current position of the host vehicle detected by the location / time function unit 15 enters a communication area where communication with the information communication center 2 is possible. Is called.

  The information management function unit 13 is a part having an agent function for centrally managing the functions of the above-described constituent elements included in the in-vehicle communication terminal 1 and transferring information to be transmitted. In addition to the agent function, the information management function unit 13 has a function of determining a route on which the host vehicle travels.

  The information management function unit 13 temporarily stores various information from the information communication center 2 acquired by the diagnosis information 3 or the communication information acquired by the Internet communication function unit 12 in the transmission / reception waiting temporary DB 17. . Also, the information management function unit 13 sequentially transmits transmission information to be transmitted to the information communication center 2 temporarily stored in the transmission / reception waiting temporary DB 17 to the information communication center 2 via the Internet communication function unit 12. Further, the information management function unit 13 temporarily stores the reception information transmitted from the information communication center 2 in the transmission / reception waiting temporary DB 17.

  The route guidance function unit 14 has a function of providing the user with planned traveling route information scheduled as a route on which the host vehicle travels determined by the information management function unit 13. The route guidance function unit 14 uses voice output for outputting voice from a screen output speaker or the like for displaying information on a monitor when performing guidance for a planned travel route.

  The location / time function unit 15 estimates the current position of the host vehicle by using GPS (Global Positioning System) and various sensors. Further, the location / time function unit 15 has a clock function, and acquires the current time and the like.

  The UI unit 16 is a user interface unit that exchanges information with the user. It has a function of outputting information received from the information communication center 2 and other vehicles to the user. Furthermore, the UI unit 16 is connected to an input unit such as a touch panel, and has a function of inputting and receiving a user operation. The information management function unit 13 determines a planned travel route on which the host vehicle travels based on GPS in the location / time function unit 15 and input information in the UI unit 16. The determination of the planned travel route will be further described later.

  The transmission / reception waiting temporary DB 17 is a temporary database that temporarily stores and stores various data transmitted and received by the short-range wireless communication function unit 11 and the Internet communication function unit 12. The information acquired by the short-range wireless communication function unit 11 and the Internet communication function unit 12 is temporarily stored in the transmission / reception waiting temporary DB 17 until a predetermined transmission / reception timing is reached. Among these, for the transmission information transmitted to the information communication center 2 via the Internet communication function unit 12 and the reception information transmitted from the information communication center 2, the current position of the own vehicle is within the communication area with the information communication center 2. The order and the transmission / reception timing are determined based on the data priority of the transmission information or the like. The transmission / reception order and transmission / reception timing of the transmission / reception information will be further described later.

  The communication area DB 18 is a database that stores and manages area information related to a communication area where communication with the information communication center 2 is possible. By using this area information in association with the current position included in the travel information of the host vehicle, it is possible to determine whether or not communication with the information communication center 2 or the like is possible at the current position. . A position where communication with the information communication center 2 is possible is a communication spot. The communication area DB 18 also stores information related to communication spots as area information. The area information including communication spots stored in the communication area DB 18 can be updated via the Internet or infrastructure.

  The media DB 19 is a database that stores information reachability, communication cost, and communicable amount per month in the installed communication media. The in-vehicle communication terminal 1 is capable of vehicle-to-vehicle communication and road-to-vehicle communication via various communication media. The media DB 19 stores various types of information related to communication media that can be communicated. Here, the reachability of information indicates the reliability (certainty) that transmission information reaches the information communication center 2 by communication. Here, the reachability, the communication cost, and the communication possible amount per month indicate the respective ratios with the maximum values being “100”, “100”, and “300”.

  Specifically, the map shown in FIG. 2 is stored in the media DB 19. As shown in FIG. 2, reachability, communication cost, and communicable amount per month in each media communication are stored in the media DB 19. For example, in the D communication system of A communication company, the communication cost is set at a high price instead of the reachability being 100%. Moreover, since the communication cost is high, a large amount of communication per month is set. On the other hand, in normal road-to-vehicle communication, the reachability is not high and the amount of communication per month is set low because the communication cost is cheap. The media DB 19 stores media communication that is generally used, and also stores reachability and the like of media communication that is not mounted on the host vehicle.

  The data priority DB 20 is a database that stores data priority, communication amount, arrival guarantee, and deviation tolerance α for various types of transmission target data that is data to be transmitted to the information communication center 2. Here, the data priority is a degree indicating the necessity of communication with the information communication center 2, and the communication amount is a communication amount when communicating transmission target data. Further, the arrival guarantee is a guarantee ratio at which transmission information reaches the information communication center 2, and the deviation allowance deviates from the route determined by the information management function unit 13, and a new planned travel route Is determined based on data priority and security. Specifically, the deviation tolerance is calculated as a product of the data priority and the arrival guarantee. Here, the data priority, the arrival guarantee, and the deviation allowance all indicate the respective ratios with the maximum value being “100”.

  Specifically, the data priority DB 20 stores a map shown in FIG. As shown in FIG. 3, the data priority DB 20 stores data priority, transmission traffic, arrival guarantee, and deviation tolerance of data to be transmitted. The data to be transmitted includes “warning on”, “non-traveling diagnostic code (diagonal code other than traveling diagnostic code)”, “traveling diagnostic code”, “security update”, “congestion information for center transmission”, “collection of specified data” There is “Freeze Frame Data”.

  For example, when the transmission target data is a warning light, it is an emergency situation, so the data priority and the arrival guarantee are set to 100, and the deviation tolerance is also set to 100. Further, the traffic amount of warning lighting is not large and is 1. Furthermore, when the transmission target data is center transmission traffic jam information, it is not a situation requiring urgent information, but is information that can be saved if the center transmission traffic jam information exists. Therefore, the traffic congestion information for center transmission has a data priority as low as 10, the arrival guarantee is 0, and as a result, the deviation tolerance is 0. The communication amount of the center transmission traffic information is 5.

  The data priority DB 20 can be updated by utilizing maintenance and communication in a dealer. Further, the communication priority is adjusted according to the priority desired to be acquired as a manufacturing company.

  The information communication center 2 includes a vehicle state management DB 21 and an Internet connection unit 22. Here, an outline of the functions of the information communication center 2 will be described with reference to FIG. FIG. 4 is an explanatory diagram for explaining an outline of functions of the information communication center. As shown in FIG. 4, the information communication center 2 includes a travel schedule area such as vehicles C1, C2, and C3 capable of inter-vehicle communication with each other, a travel schedule such as a destination, a travel schedule route, and a travel time. This is an Internet relay system that manages and grasps information transmitted / received and transferred between vehicles. In the example shown in FIG. 4, the vehicle C1 is traveling on the road R1, and the vehicles C2 and C3 are on the opposite lane of the road R1, and are traveling on the road R2 adjacent to the road R1.

  The vehicle state management DB 21 in the information communication center 2 is a database that manages the state of vehicles sold worldwide. The Internet connection unit 22 is a functional unit that performs Internet connection. The Internet connection unit 22 connects to the outside while securing security using a VPN (Virtual Private Network) or the like.

  In the vehicle information communication apparatus according to the present embodiment, normal information is transmitted from the in-vehicle communication terminal 1 to the information communication center 2 by normal road-to-vehicle communication. However, communication information is expensive for highly urgent information and the like. Media with excellent reachability, for example, communication by wide area public radio such as D communication method by A communication company or B communication company is performed.

  The diagnosis sensor 3 performs a failure diagnosis of the vehicle based on information transmitted from various sensors such as a vehicle speed sensor and a steering angle sensor provided in the vehicle. The diagnostic sensor 3 transmits diagnostic information based on the result of failure diagnosis to the information management function unit 13. here. As shown in FIG. 3, the diagnostic information includes a traveling system diagnostic relating to traveling of the vehicle and a non-travel meter diagnostic not directly related to traveling of the vehicle. The information management function unit 13 temporarily stores the diagnosis information transmitted from the diagnosis sensor 3 in the transmission / reception waiting temporary DB 17. Furthermore, when performing inter-vehicle communication with another vehicle, the diagnostic information is transmitted to the other vehicle and the diagnostic information transmitted from the other vehicle is received.

  Next, processing in the vehicle information communication apparatus according to the present embodiment will be described. In the information communication apparatus for a vehicle, departure degree determination processing and signal transmission / reception processing are performed. FIG. 5 is a flowchart showing a processing procedure of the deviation degree determination processing. As shown in FIG. 5, in performing the departure degree determination process, in the vehicle information communication device according to the present embodiment, first, in the information management function unit 13, the information is transmitted and received with the information communication center 2. The transmission / reception target information is acquired (S1). The transmission / reception target information includes information transmitted from another vehicle via vehicle-to-vehicle communication and information transmitted from the diagnosis sensor 3.

  Subsequently, the information management function unit 13 refers to the acquired transmission / reception target information (hereinafter referred to as “acquired transmission / reception target information”) to a map stored in the data priority DB 20, and determines the data priority of the acquired transmission / reception target information. (S2). For example, when the acquired transmission / reception target information is a warning lighting or a traveling system diagnosis code, the data priority is determined to be 100. If the acquired transmission / reception target information is a non-traveling diagnosis code or traffic jam information, the data priority is determined to be 10.

  When the data priority of the acquired transmission / reception target information is determined, the urgency of the acquired transmission / reception target information is determined by referring to the acquired transmission / reception target information on the map stored in the data priority DB 20, and is the urgency level “high”? It is determined whether or not (S3). For example, when the data priority is “100”, such as when the acquired transmission / reception target information is a warning lighting or a travel system diagnosis code, it is determined that the urgency level is high.

  As a result, when the data priority is determined to be “100” and the urgency level is determined to be high, the urgent transmission is performed as the urgent transmission. Send priority. In order to perform transmission with the highest priority, it is determined whether or not the vehicle is capable of media communication by wide area public radio (S4). Here, the wide area public radio refers to the D communication method by A communication company and B communication company and the W communication method by C communication company shown in FIG. Here, when it is determined that the vehicle can perform media communication using the wide area public radio, the minimum data is transmitted to the information communication center 2 using the media communication based on the wide area public radio that is enabled ( S5) If there is data other than the minimum data, the data other than the minimum data is stored in the transmission / reception waiting temporary DB 17, and the process proceeds to step S28 shown in FIG.

  If it is determined in step S4 that media communication by wide area public radio is not possible, the deviation allowance α is set large (S7). By setting the deviation allowance α large, the host vehicle travel route is intentionally guided so that the host vehicle travel route is included in the communication area.

  If it is determined in step S3 that the urgency level of the acquired transmission / reception target information is not “high”, it is determined whether the urgency level of the acquired transmission / reception target information is “medium” (S6). Whether or not the urgency level is “medium” is determined based on, for example, whether or not the data priority is not “100” but “30” or more. As a result, when it is determined that the urgency level of the acquired transmission / reception target information is “medium”, the deviation allowance α is set to a large value (S7), and the intended vehicle travel route is included in the communication area. The own vehicle traveling route is guided.

  When it is determined that the urgency level of the acquired transmission / reception target information is not “medium”, the urgency level of the acquired transmission / reception target information is “low” (S8). In this case, the deviation allowance α is set to a small value (S9), and the host vehicle travel route is guided so that the driver's travel route does not feel uncomfortable as much as possible regardless of the communication area.

  Thereafter, the deviation tolerance α set in step S7 or step S9 is added to the final deviation tolerance αL (S10). When adding the deviation tolerance α, when there are a plurality of the same data, for example, when a plurality of the same diagnosis codes are stored, the addition of the deviation tolerance α is stopped. In addition, when the same phenomenon appears again after the transmission target data is transmitted to the information communication center 2, the deviation tolerance α is added even if the deviation tolerance α is the same data. Do. Therefore, when setting the final departure tolerance αL, the departure tolerance α is sequentially added to increase the final departure tolerance αL.

  Thereafter, it is determined whether or not the processing has been completed for all transmission / reception target data acquired by the information management function unit 13 (S11). As a result, if the processing has not been completed for all the transmission / reception target data, the process returns to step S2 and the same processing is repeated. On the other hand, if the process has been completed for all the transmission / reception target data, the deviation degree determination process is terminated and the process proceeds to the signal transmission / reception process shown in FIG.

  Next, signal transmission / reception processing will be described with reference to FIG. FIG. 6 is a flowchart showing a procedure of signal transmission / reception processing. As shown in FIG. In the signal transmission / reception process, first, the final deviation allowance αL is set, the transmission / reception order of the transmission / reception target data is determined, and the transmission / reception target data is stored in the transmission / reception waiting temporary DB 17 in the transmission / reception order (S21). As for received data, when requesting the received data from the information communication center 2, priorities are set for the requested received data, and for received data having a higher priority, prior to transmission of the transmitted data. Receive data is received. Here, the received data includes, for example, diagnostic information used in failure diagnosis by the diagnostic sensor 3 and update information such as POI (Point Of Interest) information.

  Next, it is determined whether or not the user has set a destination using the UI unit 16 (S22). As a result, when it is determined that the user has set the destination, a normal recommended route is calculated (S23). As a normal recommended route, a route search based on a cost calculation of a passing cost such as a conventional layered Dijkstra method or a shortest route method is used. By these methods, for example, a route with the lowest cost is generated as a recommended route. When calculating a normal recommended route, traffic jam information and the like in the route can be taken into consideration.

  Here, after calculating a normal recommended route, a process of correcting the route to a route considering communication with the information communication center 2 is performed. For example, as shown in FIG. 7, the recommended route RR serving as the first route of the present invention is calculated. However, when there is high priority data for which transmission to the information communication center 2 is prioritized, the recommended route RR is used. The RR is corrected to generate a corrected route MR that is a second route of the present invention having a higher passing cost than the recommended route RR.

  In generating the corrected route MR, first, the number of candidate waypoints is estimated (S24). The transit point here is a point within a range in which transmission / reception with the information communication center 2 is possible. The number of transit points as candidates is estimated based on the data amount of transmission / reception target data stored in the transmission / reception waiting temporary DB 17. Here, the number of candidate stop points is estimated so that the number of candidate stop points increases as the amount of transmission / reception target data stored in the send / receive waiting temporary DB 17 increases.

  When the number of transit points as candidates is estimated, a transit point candidate is searched (S25). For example, as shown in FIG. 8A, it is assumed that a recommended route RR is calculated between the departure point ST and the destination GL. In this case, when searching for a waypoint candidate, as shown in FIG. 8B, the search area X is set based on the relationship between the departure point ST and the destination GL. The search area X is set to a range having a predetermined width from the range of the departure radius and the recommended route RR set in advance around each of the departure point ST and the destination GL. A stopover candidate is found from within this search area X. However, within the range of the departure radius around the departure point ST, within the range of the departure radius around the destination GL, within the range of the departure radius around the destination GL, after passing through the destination GL, to the destination GL The range to be returned is excluded from the search area X.

  When specifying a waypoint candidate, information such as the on-board communication device installed in the host vehicle, the search area set in step S25, and the data priority is used. For example, in the example shown in FIG. 8B, the waypoint candidates are determined from among the communication spots CS <b> 1 to CS <b> 14 provided with communication roadside devices capable of communicating with the information communication center 2. Moreover, it can also be set as the aspect which calculates | requires a communication area instead of a communication spot. When determining a waypoint candidate, geometric calculation such as a formula of the distance between a point and a straight line between the recommended route RR and each of the communication spots CS1 to CS14 is used.

  The information management function unit 13 searches the communication area DB 18 for a communication spot CS in the search area X. In the example illustrated in FIG. 8B, seven communication spots CS <b> 1 to CS <b> 7 are included in the search area X. Further, the seven communication spots CS located outside the search area X are not searched as transit point candidates here.

  If the waypoint candidate is searched, a presentation route in which the recommended route is corrected is generated (S26). When correcting the recommended route, the number of waypoints estimated in step S24 and the waypoint candidates searched in step S25 are used. Here, for example, it is assumed that the estimated number of waypoints is 3, and seven communication spots CS in the search area X shown in FIG. 8B are searched. In this case, since only one communication spot CS passes through the recommended route RR, the route is corrected, and among the seven communication spots CS in the search area X, as shown in FIG. Then, the route is corrected to pass through three or more communication spots CS.

  At this time, it is possible to easily pass the communication spot CS by largely leaving the recommended route RR. However, if the route that is far away from the recommended route RR is passed, the user may feel uncomfortable with the route guidance. . For this reason, it is desired to pass through the three communication spots CS without leaving the recommended route RR greatly.

  Therefore, when correcting the recommended route RR and calculating the presented route, after generating the modified route MR, the presented route is determined using the following equation (1). Here, when the condition of the following formula (1) is satisfied, the corrected route is determined as the presentation route. In addition, when the condition of the following formula (1) is not satisfied, the recommended route is determined as the presentation route.

(Recommended route cost) ≧ (Corrected route cost) − (Σα * k) (1)
Where α: Allowable deviation
k: Distance cost coefficient (constant)

In addition, when a plurality of correction paths satisfy the above equation (1),
(Correction path cost)-(Σα * k)
The path with the smallest value is the corrected path used in the above equation (1).

  When the presentation route is determined as the recommended route or the correction route in this way, the UI unit 16 presents the determined presentation route to the user (S27). Thereafter, when the vehicle travels along the presented route and passes through the communication area, the data stored in the transmission / reception waiting temporary DB 17 is sequentially transmitted to and received from the information communication center 2 (S28). When transmitting / receiving transmission / reception data, position information and time information indicating a place and time at which an event transmitted by the transmission / reception data occurs is added.

  Here, when performing transmission / reception of transmission / reception data, the information management function unit 13 rearranges the transmission / reception data stored in the transmission / reception waiting temporary DB 17 in order from the highest data priority. Rearrangement of transmission / reception data is performed each time new transmission / reception data is stored in the transmission / reception waiting temporary DB. From the in-vehicle communication terminal 1 to the information communication center 2, transmission / reception data with high priority is transmitted in order. For example, when the transmission / reception data is freeze frame data, the information communication center 2 can quickly grasp the location, time, and content of the failure of the freeze frame. Therefore, it is possible to quickly cope with a failure in the traveling system.

  When a plurality of media can be used for transmission / reception to / from the information communication center 2, the arrival guarantee in each transmission / reception data is compared with the reachability of the media. Then, using a medium whose transmission / reception data arrival guarantee is equal to or higher than the reachability of the medium, transmission is performed with priority from transmission / reception data having a high data priority. 2 is subtracted from the communication amount of each communication medium shown in FIG. 2 per month, and when the communication amount becomes less than the communication amount, Of these, media with low reachability are used sequentially. However, when the degree of arrival is less than that shown in FIG. 3, transmission / reception is performed using a medium that satisfies the reachability and minimizes the cost.

  Then, it is determined whether transmission / reception of transmission / reception information stored in the transmission / reception waiting temporary DB 17 is completed (S29). As a result, when transmission / reception of transmission / reception information is not completed, the process returns to step S28, and transmission / reception is performed in the communication area. If transmission / reception of transmission / reception information has been completed, the process is terminated.

  As described above, in the vehicle information communication device according to the present embodiment, the higher the priority of information communication communicated between the in-vehicle communication terminal 1 and the information communication center 2, the fixed route is fixed rather than the recommended route. It is easy to be selected as a route. For this reason, when the priority of transmission data is low and the importance is low, it is less likely to select a correction route instead of a recommended route for information. Therefore, it is possible to prevent the recommended route, which is the initial guide route, from being deviated as much as possible while increasing the frequency of information communication with highly important transmission / reception data with the information communication center 2. Therefore, it is possible to exchange data with the information communication center 2 for important information while reducing the troublesomeness for the user.

  Moreover, the priority of transmission data is determined based on the data priority according to the transmission object data memorize | stored in data priority DB20. For this reason, the individual data priority according to transmission object data can be acquired easily. Moreover, since the priority of transmission data is determined based on the individual data priority according to transmission object data, the priority of transmission data can be determined easily. In addition, the presentation route can be determined in consideration of the priorities of a plurality of transmission target data.

  Furthermore, when the urgency level of the transmission data is high, the communication cost is higher than that of normal road-to-vehicle communication, but communication is performed using a communication method that enables early and reliable information communication. For this reason, urgent data can be transmitted to the information communication center 2 very early.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the corrected route MR is generated based on the relationship between the starting point and the destination, but the corrected route can also be generated by adding priority thereto. For example, the higher the priority of data to be transmitted / received, the higher the cost, but it is possible to generate a corrected route that passes more communication spots.

  Moreover, although the said embodiment demonstrated the aspect which the own vehicle directly transmits / receives data with the information communication center 2, For example, when there exists a large amount of transmission data, other vehicles are used using vehicle-to-vehicle communication. The transmission data can be transmitted to the vehicle, and the transmission data can be transmitted to the information communication center 2 via another vehicle.

  Furthermore, although the above embodiment has been described with a focus on the case where transmission / reception data is transmitted from the in-vehicle communication terminal 1, similar processing can be performed for transmission / reception data transmitted from the information communication center 2. For example, the case where reprogramming data is transmitted from the information communication center 2 is also an object of application of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle-mounted communication terminal, 2 ... Information communication center, 3 ... Diag sensor, 11 ... Near field communication function part, 12 ... Internet communication function part, 13 ... Information management function part, 14 ... Route guidance function part, 15 ... Location -Time function unit, 16 ... UI unit, 17 ... Transmission / reception temporary waiting DB, 18 ... Communication area DB, 19 ... Media DB, 20 ... Data priority DB, 21 ... Vehicle state management DB, 22 ... Internet connection unit, CS ... Communication spot, GL ... Destination, MR ... Modified route, RR ... Recommended route, ST ... Departure point, X ... Search area.

Claims (5)

An information communication device for a vehicle that performs wireless communication between an in-vehicle wireless communication terminal mounted on a vehicle and a base station,
First guide route generating means for generating a first guide route;
Second guide route generation means for generating a second guide route having a passage cost larger than that of the first guide route based on a communicable range of the communication base station;
Vehicle passage route selection means for selecting a route through which the vehicle passes from the first guide route and the second guide route;
The vehicle passage route selecting means makes the second guide route easier to select as the priority of information communication communicated between the in-vehicle wireless communication terminal and the communication base station is higher. Information communication equipment. Individual priority acquisition means for acquiring individual priority according to the type of information communication communicated between the in-vehicle wireless communication terminal and the communication base station,
The vehicle information communication apparatus according to claim 1, wherein the vehicle passage route selection unit determines the priority based on each individual priority of information communication acquired by the individual priority acquisition unit. The information communication storage means further includes an individual priority storage means for storing an individual priority preset for each information communication communicated between the in-vehicle wireless communication terminal and the communication base station,
The vehicle information communication apparatus according to claim 2, wherein the individual priority acquisition unit acquires the individual priority based on the individual priority stored in the individual priority storage unit.   The priority of the information communication is determined according to the individual priority of the plurality of information communications when there are a plurality of information communications communicated between the in-vehicle wireless communication terminal and the communication base station. The vehicle information communication apparatus according to claim 3. The in-vehicle wireless communication terminal includes a plurality of wireless communication means having different communication capabilities,
The vehicle passage route selection means depends on the urgency of information communication communicated between the in-vehicle wireless communication terminal and the communication base station and the type of wireless communication means for performing wireless communication with the communication base station. The vehicle information communication device according to claim 1, wherein a route through which the vehicle passes is selected.

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