JP2006079558A - Area information display method, parking lot guidance system, dsrc in-vehicle device, in-vehicle computer, and parking lot guidance screen display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an area information display method, a parking lot guidance system capable of navigating fully responding to a user demand by supplying area information being the information of an area to a user vehicle when entering into a designated area such as a parking lot or the like, and other accompanying devices thereof. <P>SOLUTION: When the user vehicle enters into a radio communication zone of a roadside device, an ETC in-vehicle device and the roadside device perform DSRC radio communication, ASL connection is set up between the ETC in-vehicle device and DSRC roadside device, and the ETC in-vehicle device gives notice to a car navigation system so that the ASL connection is successfully set up (S106). IP connection is established between the car navigation system and a parking lot server, and the car navigation system displays a parking information screen on a display by receiving parking lot information from the parking lot server (S111). Detailed guidance in the parking lot can be offered to a user. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an area information display method, a parking lot guidance system, a DSRC in-vehicle device, an in-vehicle computer, and a parking lot guidance screen display device.

In recent years, various research and development for ITS (Intelligent Transport System) has been actively conducted.
As a typical system in the field of ITS, ETC (Electronic Toll Collection) that automatically collects tolls on toll roads (highways, etc.) and allows toll road users to pass through the toll gate almost non-stop : Toll road automatic toll collection system) has already been put into practical use. This ETC exchanges information required for toll collection by DSRC wireless communication (Dedicated Short Range Communication) between the ETC on-board equipment mounted on the vehicle and the roadside equipment provided at the entrance / exit gate of the toll gate It is a system that is realized by doing. And the technique which applied this ETC to a parking lot system so that it can pass through a warehousing gate almost non-stop is also known (refer patent document 1).

  On the other hand, a so-called “car navigation system” that electronically displays a map on a display screen provided in a driver's seat of a vehicle and displays the current position and traveling direction of the vehicle on the map is widely known. . The car navigation system is also a system that plays an important role in the field of ITS like the ETC described above.

  The car navigation system includes a control unit, a distance sensor for positioning, a direction sensor, a GPS receiver unit, a display device, a CD-ROM or DVD-ROM containing a map database, its playback device, and an input for communication with the driver. An output device is included. The control unit is composed of a main CPU and various memories that perform control for overall system control, position determination, and route search / guidance. The input / output device corresponds to a remote control or a touch switch for a driver to operate the system.

  The car navigation system having such a configuration has a function of a locator that knows the current position of the host vehicle, a function of a navigator that searches the optimum route to the destination based on this, and teaches the driver the route.

  By the way, GPS (Global Positioning System) using artificial satellites is a positioning system in which four artificial satellites orbit around six hygienic orbits while transmitting their orbit data. Positioning is to receive radio waves from four of these sanitations and obtain latitude / longitude and altitude from their position data, and the GPS receiving unit receives and calculates signals.

This GPS positioning has the great advantage that it can know the absolute position on the earth and can be used anywhere in the world.
JP 2002-140740 (Claim 1, FIG. 2)

  However, in the car navigation system described above, positioning cannot be performed when radio waves from a plurality of artificial satellites cannot be received, such as in valleys, tunnels, or behind a large building. A positioning method other than GPS, for example, an autonomous method for obtaining the current position by drawing a movement trajectory from the departure point to the current point using data from a direction sensor or a mileage sensor, and outputting accurate position information by radio waves There is also a method of performing positioning in combination with a radio system using a road device called a beacon. However, even with these methods, there are limitations in underground parking lots where radio waves from artificial satellites do not reach, and sufficient guidance has not been provided.

  In addition, although the car navigation system stores the existence information of general roads and facilities around the road, it does not include information on private facilities such as parking lots and designated facilities, etc. It is not possible to display specific information on parking lots (predetermined areas) such as fees and charges. For this reason, the user cannot utilize the navigation device in parking lots other than roads, and has to rely on visual observation or signboard guidance. In other words, even if a user vehicle is equipped with a car navigation system or an ETC in-vehicle device and enters the parking lot using the ETC in a non-stop manner, for example, the user has to visually search for an empty garage. In other words, it has not been said that a system capable of sufficiently responding to requests from the user's standpoint has been constructed.

  Therefore, the present invention has been made in view of the above circumstances, and its purpose is to supply area information, which is information relating to the area, to the user vehicle even when the vehicle enters a predetermined area such as a parking lot. It is an object to provide an area information display method and a parking lot guidance system that enable navigation capable of sufficiently responding to the above. In addition, a DSRC in-vehicle device in the parking lot guidance system, an in-vehicle computer in the parking guidance system, and a parking guidance screen display device in the parking guidance system are provided.

  In order to solve the above-mentioned problem, in the area information display method according to claim 1, a DSRC roadside device capable of DSRC wireless communication and an area connected to the roadside device so as to be able to communicate with the DSRC roadside device are provided. An area server having storage means for storing area information, which is information, a DSRC on-vehicle device capable of DSRC wireless communication with the DSRC roadside device mounted on the user vehicle, and an area that is communicably connected to the DSRC on-vehicle device. An in-vehicle computer having display means for displaying an information screen, and when the user vehicle enters the DSRC radio communication area of the DSRC roadside machine, the DSRC onboard machine and the DSRC roadside machine perform DSRC radio communication. An ASL connection is established between the DSRC in-vehicle device and the DSRC roadside device, and the DSDS indicates that the connection has been made. A connection notification step in which the vehicle-mounted device notifies the vehicle-mounted computer, an area information request step in which the vehicle-mounted computer that has received the notification in the connection notification step requests the area information from the area server, and the area information request step Later, the area information transmission step in which the area server transmits the area information to the in-vehicle computer, and the area information display step in which the area information screen is displayed on the display unit based on the area information transmitted by the in-vehicle computer. And executing.

  In the area information display method according to claim 2, in the area information display method according to claim 1, the area information is in-area guide information including in-area map data, and an in-area guide screen is displayed on the display means. It is displayed.

  In the area information display method according to claim 3, in the area information display method according to claim 1 or 2, in the connection notification step, an ASL connection is established between the DSRC in-vehicle device and the DSRC roadside device. After being made, after waiting for a predetermined time, the DSRC in-vehicle device notifies the in-vehicle computer that the connection has been made.

  In the area information display method according to claim 4, in the area information display method according to any one of claims 1 to 3, the DSRC in-vehicle device and the in-vehicle computer are connected by a LAN. The connection notification step is performed by broadcast transmission.

  The area information display method according to claim 5, wherein the area information requesting step is executed by IP connection to a predetermined IP address of the area server. Features.

  The area information display method according to claim 6, wherein the IP address is set to a common IP address for area servers in different areas, according to the area information display method according to claim 5. Is characterized in that the IP address is stored in advance in a predetermined storage means.

  The area information display method according to claim 7, wherein the DSRC in-vehicle device of the user vehicle is an ETC in-vehicle device according to any one of claims 1 to 6. And

  The area information display method according to claim 8, wherein the in-vehicle computer acquires current position information of the user vehicle in the area information display method according to any one of claims 1 to 7. A car navigation system comprising: means; and display means for displaying the current position of the user vehicle superimposed on a map image based on the current position information.

  The area information display method according to claim 9 is the area information display method according to claim 8, wherein the in-vehicle computer that has received the notification in the connection notification step moves the display screen of the in-vehicle computer to a target area. A warehousing screen display switching step of switching from a normal navigation screen for navigating the user vehicle to a warehousing guidance screen for the area is further performed.

  In the area information display method according to claim 10, in the area information display method according to claim 8 or 9, the in-vehicle computer has an end instruction input means for inputting the end of the on-site guidance, and the display An end screen display switching step of switching the area information screen displayed on the means to the normal navigation screen is further performed.

  In the area information display method according to claim 11, the area information display method according to any one of claims 1 to 10, wherein the area information includes empty garage data for each predetermined date and time in the area. The area server further executes an empty garage data search step of searching for empty garage data corresponding to the warehousing date and time of the user vehicle from the empty garage data stored in the storage means. In the area information display step, An area information screen including an empty garage position at the time when the user vehicle is received is displayed based on internal map data and the empty garage data at the time of warehousing of the user vehicle searched in the empty garage data search step. And

  13. The area information display method according to claim 12, wherein the area server that has received access by broadcast transmission from the DSRC roadside machine before the connection notification step is the area information display method according to claim 11. A data retrieval step is executed.

  In the area information display method according to claim 13, in the area information display method according to any one of claims 1 to 12, the storage means of the area server identifies a DSRC in-vehicle device of the user vehicle. It further stores reservation information including at least a possible identification code and a desired warehousing date and time desired by the user, and the area server is located when the user vehicle approaches the warehousing gate where the DSRC roadside machine is installed. The DSRC roadside machine collates whether or not the identification code received from the DSRC in-vehicle apparatus matches the identification code of the reservation information stored in the storage means, and performs a predetermined process according to the collation result The reservation information collation processing step is executed.

  The area information display method according to claim 14, wherein the area server that has received access by broadcast transmission from the DSRC roadside device before the connection notification step is the area information display method according to claim 13. A verification processing step is executed.

  In the area information display method according to claim 15, in the area information display method according to claim 13 or 14, the identification code is a wireless call number.

  The parking lot guidance system according to claim 16, further comprising a DSRC roadside device capable of DSRC wireless communication, and a storage means connected to the DSRC roadside device so as to be communicable and storing parking lot information including map data in the parking lot. A parking lot server, a DSRC in-vehicle device mounted on a user vehicle, and an in-vehicle computer connected to the DSRC in-vehicle device and having display means for displaying the parking lot information; When the user vehicle enters the DSRC wireless communication area of the DSRC roadside device, the DSRC on-vehicle device and the DSRC roadside device perform DSRC wireless communication, and the ASL is connected between the DSRC on-vehicle device and the DSRC roadside device. A connection notifying means for connecting the DSRC in-vehicle device to notify the in-vehicle computer that the connection has been made; The on-vehicle computer has parking information requesting means for requesting the parking lot information to the parking lot server after receiving the notification from the connection notification means, and the parking lot server receives parking information by the parking lot information requesting means. Parking information transmission means for transmitting the parking lot information to the in-vehicle computer when there is a parking lot information request, and the in-vehicle computer receives the parking lot information and then guides in the parking lot based on the parking lot information. It has parking lot guidance display means for displaying a screen.

  In the parking lot guidance system according to claim 17, in the parking lot guidance system according to claim 16, the DSRC in-vehicle device of the user vehicle is an ETC in-vehicle device.

  In the parking lot guidance system according to claim 18, in the parking lot guidance system according to claim 16 or claim 17, the in-vehicle computer includes a current position acquisition means for acquiring current position information of a vehicle, and the current position. It is a car navigation system having display means for displaying the current position of the user vehicle on a map image based on the information.

  The DSRC in-vehicle device in the parking lot guidance system according to claim 19 is the DSRC in-vehicle device in the parking lot guidance system according to any one of claims 16 to 18.

  The in-vehicle computer in the parking lot guidance system according to claim 20 is the in-vehicle computer in the parking lot guidance system according to any one of claims 16 to 18.

The parking screen guide screen display device according to claim 21 has the DSRC in-vehicle device according to claim 19 and the in-vehicle computer according to claim 20.
The parking lot guide screen display device according to claim 22 is the parking lot guide screen display device according to claim 21, wherein the in-vehicle computer is integrated with the DSRC in-vehicle device.

  According to the present invention, even when a vehicle enters a predetermined area such as a parking lot, navigation that can sufficiently respond to a user's request by supplying area information, which is information about the area, to the user vehicle is possible.

(First embodiment)
Hereinafter, the area information display method of the present invention, the parking lot guidance system, the DSRC in-vehicle device in the parking lot guidance system, the in-vehicle computer in the parking lot guidance system, and the parking lot guidance screen display device in the parking lot guidance system are embodied. The embodiment will be described with reference to FIGS.

  FIG. 1 is a schematic diagram showing a system configuration of a parking lot guidance system 1 according to the present embodiment. As shown in FIG. 1, the parking lot guidance system 1 includes a roadside machine 3 for performing DSRC wireless communication provided in the parking gate 2 of the parking lot, and a parking lot for managing vacant garage data for each predetermined date and time in the parking lot. The vehicle server 4, the ETC vehicle-mounted device 6 (DSRC vehicle-mounted device) mounted on the user vehicle 5, and the car navigation system 7 are configured. The parking lot server 4 and the roadside machine 3 are physically connected to each other by a LAN cable 8. Similarly, the ETC in-vehicle device 6 and the car navigation system 7 are physically connected to each other by a LAN cable 9.

  In addition, the standard of DSRC wireless communication employed in the present embodiment is defined by “Dedicated Short Range Communication (DSRC) system standard ARIB STD-T88” (Radio Industry Association). . This regulation was formulated with the participation of wireless device manufacturers, telecommunications carriers and users, and established basic technical conditions such as standard use of wireless equipment for various radio wave utilization systems. This standard is based on national technical standards established for the purpose of effective use of frequencies and avoidance of interference with other users, as well as ensuring appropriate quality and compatibility of radio equipment, This is a private standard that is formulated by compiling private voluntary standards that are formulated for the purpose of convenience for telecommunications carriers and users.

  The ARIB STD-T88 employed in this embodiment is a communication between a mobile station of the DSRC system defined in ARIB STD-T75 (in this embodiment, the ETC in-vehicle device 6) and the base station (in this embodiment, the roadside device 3). 1 defines a narrow area communication (DSRC) application sublayer (DSRC-ASL: DSRC Application Sub-Layer) that complements the function of the DSRC protocol and enables execution of a plurality of applications.

  In the standard ARIB STD-T75, the OSI reference model has a three-layer structure, and layer 1, layer 2, and layer 7 are subject to standardization. In the standard ARIB STD-T88 adopted in the present embodiment, an application sublayer provided in a higher layer is further targeted for standardization. The hierarchical structure of the communication protocol of the ETC in-vehicle device 6 and the car navigation system 7 in this embodiment will be described in detail later with reference to FIG.

(System 1 overall configuration)
In the present system 1, the parking lot server 4 is connected to the Internet. The parking lot server 4 is configured as a well-known three-layer client / server system in which a server OS (Operating System) is installed so as to constitute a server capable of communication using, for example, a TCP / IP protocol.

  Via the parking server 4 configured as described above, parking information (map data in the parking lot, empty garage data) described in detail below is input / output to / from the car navigation system 7 mounted on the user vehicle 5. It can be done. The parking lot information corresponds to the area information of the present invention, and the parking lot map data corresponds to the in-area map data. Then, when the user vehicle 5 enters the parking lot, the screen of the car navigation system 7 is switched to display a detailed map and an empty garage position in the hall. In addition, the parking lot guidance system 1 of this embodiment permits the entry of only reserved vehicles that have been reserved in advance in the parking lot, and has a function of a reservation parking system that guides the location of the garage secured at the time of reservation. It is a system equipped with.

Hereinafter, the system 1 will be described in detail from its partial configuration.
(Configuration of parking server 4)
First, the configuration of the parking lot server 4 will be described. FIG. 2 is a block diagram conceptually showing the structure of the parking lot server 4. The parking lot server 4 is connected to the Internet 12 via a communication port 11, the communication port 11 is connected to an I / O port 13, and the I / O port 13 is connected to a bus 14. A CPU 15, a ROM 16, a RAM 17, and an HDD 18 (hard disk drive) as storage means are provided via the bus 14.

  Parking map database 19 (parking information database), vacant garage database 21 (parking information database), reservation information database, which are independently input (or input through the Internet 12), into HDD 18 serving as a large-capacity storage unit. Each database such as 22 is provided.

  As conceptually shown in FIG. 3, the reservation information database 22 stores various data such as the WCN (wireless call number) of the reserved user vehicle, the user's e-mail address, the warehousing date, and the warehousing time. WCN is a self ID of the ETC in-vehicle device.

  Further, as shown in FIG. 2, a program storage unit 23 is set in the HDD 18. In addition to the server OS described above, there are stored various programs for processing at the time of warehousing based on access from the car navigation system 7 and access from the roadside device 3 made through DSRC wireless communication. . Examples of this program include a reservation information collation processing program 24, a parking lot guidance display program 25, and the like.

  The reservation information collation processing program 24 executes a process of collating whether the user vehicle 5 belongs to the reserved user when the user vehicle 5 is received. The parking lot guidance display program 25 receives the access from the car navigation system 7 and displays the map data in the parking lot and empty garage data (hereinafter collectively referred to as “parking lot information”) on the display screen of the car navigation system 7. Execute the process to be displayed. The detailed processing relating to the above program will be described in detail later. Moreover, CPU15 of the parking lot server 4 is equivalent to the parking lot guidance display means of this invention, and functions also as a control means which controls opening and closing of the warehousing gate 2. FIG.

(Hardware configuration of ETC in-vehicle device 6)
Next, the configuration of the ETC in-vehicle device 6 will be described. FIG. 4 is a block diagram conceptually showing the hardware configuration of the ETC in-vehicle device 6 and the car navigation system 7. As shown on the left side of FIG. 4, the ETC in-vehicle device 6 is connected to a DSRC wireless communication unit 31 for performing DSRC wireless communication, an IC card interface unit 32 into which an IC card is inserted, and a car navigation system 7. A navigation interface unit 33, a storage unit 36 having a ROM 34 and a RAM 35, and a CPU 37. These units are connected by a bus 38. When an IC (Integrated Circuit) card (so-called ETC card) is inserted into the IC card interface unit 32, the ETC in-vehicle device 6 reads the personal identification information of the user recorded on the IC card. In the present invention, since the user vehicle 5 is recognized through DSRC wireless communication using the WCN which is the self ID of the ETC in-vehicle device 6 as an identification code, smooth warehousing can be performed without an IC card inserted. .

(Hardware configuration of car navigation system 7)
Next, the configuration of the car navigation system 7 will be described. As shown on the right side of FIG. 4, the car navigation system 7 includes a current position detection unit 41 (current position acquisition means), an operation input unit 42, an image display unit 43, an audio output unit 44, and a CD-ROM. An equal reading unit 45 is included. Further, the storage unit 48 includes a ROM 46 and a RAM 47, an interface unit 49 connected to the ETC in-vehicle device 6 via a LAN cable, and a CPU 51. These units are connected by a bus 52. In this embodiment, the ETC in-vehicle device 6 and the car navigation system 7 are connected by a LAN cable 9.

  The current position detection unit 41 is equipped with a distance sensor, a direction sensor, a GPS receiving unit, and the like (not shown). The current position calculated using these distance sensors is the current position of the user vehicle 5 as a driver. In order to make it recognize, it is superimposed and displayed on the map image of the image display unit 43 by a predetermined instruction pointer (see the screen arrow in FIG. 9A).

  The operation input unit 42 is various key switches for command input related to destination search conditions, route setting, signal transmission for ending parking lot guidance, and the like. Specifically, an enter key for confirmation or confirmation input, a menu selection key, a volume adjustment key for adjusting the volume of voice guidance, and the like. In addition, as long as it has a function similarly to these, other command input forms, such as a touch panel, may be sufficient.

  The image display unit 43 is a display device such as a known backlit color LCD (liquid crystal display element). The image display unit 43 displays a map image (general road, surrounding facility, parking lot map), a current position displayed on the map, a search route, an empty garage position, and the like. The voice output unit 44 is a speaker device that outputs a guide voice for route guidance.

  The reading unit 45 such as a CD-ROM reads predetermined data (a predetermined program, map data (map data such as general roads), route guidance data) from a recording medium such as a CD-ROM or DVD-ROM in which a map database is stored in advance. It is a device for acquiring. The parking lot map data on the parking lot guide screen, which is the main part of the present invention, is not acquired by the reading unit such as the CD-ROM, but supplied from the outside (parking lot server 4) through DSRC wireless communication. Received and acquired.

(Configuration of communication protocol layer between ETC in-vehicle device 6 and car navigation system 7)
Next, a hierarchical configuration of communication protocols between the ETC in-vehicle device 6 and the car navigation system 7 will be described. FIG. 5 is a diagram showing a hierarchical configuration of communication protocols between the ETC in-vehicle device 6 and the car navigation system 7. As shown in FIG. 5, in the communication protocol layer between the ETC in-vehicle device 6 and the car navigation system 7, a protocol (Ethernet (registered trademark)) corresponding to the three-layer structure of the OSI reference model in which layer 1, layer 2, and layer 7 are standardized. ), IP, TCP), an application layer is provided in an upper layer.

  The ELCP (Extended Link Control Protocol: Extended Communication Control Protocol) located in the application layer of the ETC in-vehicle device 6 has an interface with the DSRC protocol stack in ASL defined by ARIB STD-T88 and performs common processing. Is what you do. LANCP (LAN Control Protocol) is a protocol for supporting various IP network protocols in ASL defined by ARIB STD-T88. In addition, there are PPPPC (PPP Control Protocol) supporting PPP and LPCP (Local Port Control Protocol) supporting non-IP system. When the ETC in-vehicle device 6 and the car navigation system 7 are connected by, for example, a serial port other than LAN connection, PPPCP or LPCP is used instead of LANCP.

  Note that TCP, which is a communication protocol located in the uppermost layer (one layer below the application layer) of the three-layer structure of the OSI reference model, can also be configured as UDP. Since UDP is connectionless compared to TCP, which is connection type, the reliability is somewhat inferior to TCP, but the data transmission speed is fast, so if you want to place importance on the data communication speed, use UDP. be able to.

  In the ETC in-vehicle device 6 and the car navigation system 7 configured as described above, when the user vehicle 5 passes through the warehousing gate 2, the ETC in-vehicle device 6 starts DSRC wireless communication with the road-side device 3 to communicate with the road-side device 3. When an ASL connection is made between them, a connection notification is transmitted from the ETC in-vehicle device 6 to the car navigation system 7. Although details will be described later with reference to the sequence chart shown in FIG. 6, when the user vehicle 5 leaves the DSRC wireless communication area, the disconnect notification that the ASL connection is disconnected is similarly sent from the ETC in-vehicle device 6 to the car navigation system. 7 to be transmitted.

(Processing in the parking lot guidance system 1)
FIG. 6 is a sequence chart showing an example of the processing flow of the parking lot guidance system 1. Hereinafter, a series of processing flows will be described in detail with reference to FIGS. As shown in FIG. 6, the roadside device 3 provided in the parking gate 2 of the parking lot is always performing a wireless communication operation, and checks whether or not the WCN transmission signal from the user vehicle 5 entering the vehicle has been received. (Step 101: WCN request. Hereinafter, step is abbreviated as “S”). If the signal from the user vehicle 5 is not received, it waits as it is. When the user vehicle 5 that has reserved the parking lot approaches the warehousing gate 2 and enters the communication area of the roadside device 3, the roadside device 3 performs wireless communication with the ETC vehicle-mounted device 6 of the user vehicle 5 and is sent from the ETC vehicle-mounted device 6. WCN as incoming vehicle information is received (S102: WCN response).

  And the parking lot server 4 receives the WCN confirmation request from the roadside machine 3 (S103), executes the reservation information collation processing program 24, and collates whether or not the received WCN matches the reserved WCN. (S104). In the WCN confirmation request step (S103) from the roadside device, FID (Fixed Equipment ID) is transmitted together with WCN by Broadcast transmission. The FID is an ID for identifying a roadside machine, and is defined by ARIB T-75.

  FIG. 7 is a flowchart showing the reservation information matching processing step (S104) for checking whether or not the received WCN matches the reserved WCN. As shown in FIG. 7, when the parking server 4 executes the reservation information collation processing program 24, the WCN received by the roadside device 3 by searching the reservation information database 22 and the reserved WCN in the reservation information database 22 are obtained. It is determined whether they match, that is, whether the WCN is reserved (S201). If it is determined that the reservation is a reserved WCN (S201: YES), the control means (CPU 15) controls to open the warehousing gate 2 and the warehousing of the user vehicle 5 is permitted (S202). Next, vacant garage data secured at the time of reservation is detected (S203), and the reservation information matching process is terminated. The detected empty garage data is referred to in the subsequent parking lot information transmission step (S110). On the other hand, if it is determined that it is not a reserved WCN (S201: NO), warehousing is rejected (S204), and the process is similarly terminated. In this case, the warehousing gate 2 is not opened by the control means. At this time, a voice announcement such as “cannot be stored” may be played from the storage gate 2 side by a predetermined sound device.

  On the other hand, when DSRC wireless communication is performed between the roadside device 3 and the ETC in-vehicle device 6, an ASL connection is made between the roadside device 3 and the ETC in-vehicle device 6 (S105). When this ASL connection is made, the ETC in-vehicle device 6 notifies the car navigation system 7 by broadcast transmission that the connection has been made after a predetermined waiting time t has elapsed (S106: connection notification step). Receiving the notification, the car navigation system 7 switches the display screen (the image display unit 43) of the car navigation system 7 from the normal navigation screen to the warehousing guidance screen (S107: screen display switching step) (= the screen display switching step during warehousing). .

  FIGS. 9A to 9C are diagrams showing display screen transition examples of the car navigation system 7 at the time of warehousing. As shown in FIG. 9, when the screen display is switched, a message such as “Welcome. Waiting” is displayed from the normal navigation screen (FIG. 9A) for navigating the user vehicle 5 to the destination. The screen display is switched to the warehousing guidance screen (FIG. 9B).

  After the screen display is switched, an IP connection is established between the car navigation system 7 and the parking lot server 4 via the ETC in-vehicle device 6 and the roadside device 3 (that is, via the DSRC wireless communication) ( S108). At this time, a predetermined IP address is allocated to the parking lot server 4 in advance, and the car navigation system 7 stores the IP address. Next, the car navigation system 7 starts a predetermined application and requests reservation information from the parking lot server 4 (S109) (= area information request step). At this time, the WCN of the user vehicle is transmitted to identify the reserved user. The reservation information referred to here includes, in addition to the map data in the parking lot, the garage position which is empty garage data secured at the time of reservation.

  Upon receiving the reservation information request, the parking lot server 4 transmits the parking lot information based on the reservation information corresponding to the WCN transmitted together (S110: parking lot information transmission step) (= area information transmission step). At this time, the vacant garage data based on the reservation has already been detected in the reservation information collation processing step (S104), and the parking lot in which this pre-detection result is combined with the in-place map data stored in the in-park map database. Processing is performed by returning information. Then, in the car navigation system 7, guidance in the parking lot is started, and as shown in FIG. 9 (c), the empty garage position (the portion indicated by the diagonal lines in FIG. 9 (c)) is displayed together with the map in the parking lot. (Parking lot guidance screen display step: S111) (= area information display step). This display screen corresponds to the area information screen and the in-area guidance screen of the present invention. With this display screen, the user can easily confirm the position of the empty garage within the screen.

  Further, when the user vehicle 5 leaves the radio communication area of the roadside device 3 and the ASL connection is disconnected, the ETC in-vehicle device 6 disconnects the car navigation system 7 in the same procedure as in the connection notification (S106). This is notified by broadcast transmission (S112: connection notification step). Upon receiving the notification, the car navigation system 7 switches the display screen (image display unit 43) of the car navigation system 7 from the parking lot guide screen (see FIG. 9C) to the normal navigation screen (see FIG. 9A). (S113: Screen display switching step at end).

  FIG. 8 is a flowchart showing the details of the end-time screen display switching process. As shown in FIG. 8, in the end-time screen display switching process, it is first determined whether or not a parking lot guidance end instruction has been input (S301). If it is determined that a parking guidance end instruction has been input (S301: YES), the parking guidance screen is switched to the normal navigation screen (S302), and the screen display switching process at the end is terminated. In addition, when the parking lot guidance end instruction is not input (S301: NO), the process waits until there is an input. The parking end instruction is performed, for example, by the user operating the “parking lot guidance end” touch panel. In this case, an operation input unit such as a touch panel corresponds to the end instruction input means of the present invention.

  As described above, in the parking lot guidance system 1 described in detail, parking lot information (parking lot map data, empty garage data) is provided to the user on the display screen of the car navigation system 7. On the parking lot guide screen (see FIG. 9C), a map of the parking lot and the position of an empty garage are displayed, and information on the parking lot that cannot be handled only by the navigation function of the normal car navigation system 7 is provided to the user. Is done. The user can check the position of the empty garage by looking at the display screen of the car navigation system 7, and can smoothly reach the empty garage without wandering around the parking lot while looking for an empty garage.

  Usually, in large-scale parking lots and underground parking lots, as described above, GPS radio waves did not reach and sufficient navigation could not be performed. However, according to this embodiment, when entering a predetermined parking lot, the parking lot information is received from the parking lot server 4 via the DSRC wireless communication and the navigation is switched to the navigation based on the received data. Detailed navigation is possible even in the hall.

  In addition, the connection notification step (S106) is executed by broadcast transmission from the ETC in-vehicle device 6 that performs DSRC wireless communication, and the reception timing of receiving the parking lot information by accessing the parking lot server 4 is determined. The car navigation system 7 can be obtained. Although the car navigation system 7 itself cannot detect that the user vehicle 5 has entered and entered the communication area of DSRC wireless communication, the connection notification step can recognize that the user vehicle 5 has entered the wireless area.

  In addition, the communication area of DSRC wireless communication can be secured only about 30 m at the maximum from the roadside device 3, and data cannot be received from the roadside device 3 when leaving the communication area. However, in this embodiment, after the WCN response (S102) and before the connection notification (S106), the parking lot server 4 performs the reservation information matching processing step (S104), and searches for empty garage data based on the reserved WCN in advance. (S203 in FIG. 7), and there is a short waiting time t in the transition from the ASL connection (S105) to the connection notification step (S106). For this reason, the parking lot server 4 can transmit the parking lot information (parking lot information transmission step, S110) without causing a time lag in response to the subsequent reservation information request (S109) from the car navigation system 7. Yes. Even after leaving the communication area, the application screen of the car navigation system 7 always displays the parking lot guide screen on the display screen so that the parking lot guide can be provided.

  Furthermore, a predetermined IP address is assigned to the parking lot server 4 in advance, and the car navigation system 7 can access the parking lot server 4 by storing the IP address. In the present embodiment, this embodiment is described with a single parking lot for simplicity, but the same processing is performed when there are a plurality of parking lots to which the system 1 is applied. In this case, a common IP address is set in each parking lot server for different parking lots. According to this, when the user enters the parking lot that is the target of the system, it is received at that time. The server of the specific parking lot can be accessed via the specific parking lot and DSRC wireless communication.

  Moreover, the parking lot guidance system 1 of the present embodiment is also a reservation parking lot system. In the present system 1, WCN as an identification code that can identify the ETC in-vehicle device 6 of the user vehicle 5 is adopted as reservation information, and a parking lot is reserved in advance before warehousing to secure a garage. There is no need to wait for an empty garage for a long time in front of the garage (near the entry gate 2), and traffic congestion is eliminated.

  For the user vehicle 5 equipped with the reserved ETC in-vehicle device 6, the vehicle information (WCN) is obtained by the function of the ETC in-vehicle device 6 at the warehousing gate 2 and the verification process is performed. There is no need to issue a warehousing process. Therefore, the user does not need to receive the ticket, and can enter the parking lot in a non-stop manner without having to stop the vehicle once at the warehousing gate 2.

  Furthermore, since the WCN is used as the vehicle information to manage from reservation to warehousing, for example, an IC card storing charging information in the normal ETC specifications is not inserted in the ETC in-vehicle device 6 and the reserved parking You can enter the parking lot.

According to the above embodiment, the following effects can be obtained.
(1) In the above-described embodiment, the map in the parking lot and the position of the empty garage are displayed on the display screen of the car navigation system 7, and the user is provided with detailed information in the parking lot that cannot be handled only by the normal navigation function. be able to. The user can see the empty garage position by looking at the display screen of the car navigation system 7 and smoothly reach the empty garage.

  (2) Conventionally, sufficient navigation was not possible because GPS radio waves did not reach large parking lots and underground parking lots. On the other hand, according to the above embodiment, when entering a predetermined parking lot, the parking lot information is received from the parking lot server 4 via the DSRC wireless communication, and the navigation is switched to the navigation based on the received data. Therefore, detailed navigation is possible even in an underground parking lot.

  (3) In the above embodiment, the connection notification step is executed by broadcast transmission from the ETC in-vehicle device 6 that performs DSRC wireless communication. Thereby, the car navigation system 7 that cannot directly detect that it has entered the DSRC wireless communication area can access the parking server 4 and receive the parking information.

  (4) In the above embodiment, the transition from the ASL connection (S105) to the connection notification step (S106) has a slight waiting time t. Since the reservation information collation processing step (S104) is executed in advance using this waiting time t, the parking lot server does not generate a time lag for the subsequent reservation information request (S109) from the car navigation system 7. 4 can transmit a parking lot guide (parking lot information transmission step, S110).

  (5) In the above embodiment, a predetermined IP address is assigned to the parking lot server 4 in advance, and the car navigation system 7 stores the IP address so that the parking lot server 4 is accessed. An IP connection is established. For this reason, when the user enters the parking lot that is the target of the system, it is possible to access the specific parking lot server and the specific parking lot server via DSRC wireless communication. That is, the system can be operated by a similar process described in detail with reference to FIG. 6 for a plurality of different parking lots to which a common IP address is assigned.

  (6) In the said embodiment, WCN as an identification code | cord | chord which can identify the ETC vehicle equipment 6 of the user vehicle 5 is employ | adopted as reservation information, and a parking lot is reserved beforehand before warehousing and the garage is ensured. For this reason, it is not necessary to wait for an empty garage for a long time in front of the parking lot (near the warehousing gate 2), and the traffic jam is eliminated.

  (7) Also, for the user vehicle 5 equipped with the reserved ETC in-vehicle device 6, vehicle information (WCN) is obtained by the function of the ETC in-vehicle device 6 at the warehousing gate 2 and the verification process is performed. There is no need to issue a ticket at the time of warehousing, and the warehousing process can be performed automatically. Therefore, the user does not need to receive a ticket and can enter the parking lot almost non-stop without having to stop the vehicle once at the warehousing gate 2.

  (8) Further, in order to perform management from reservation to warehousing using WCN as vehicle information, for example, in a state where an IC card storing charging information in a normal ETC specification is not inserted in the ETC in-vehicle device 6, You can enter the reserved parking lot.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. This second embodiment is a parking lot guidance system without a reservation system. The overall system configuration (Fig. 1), the parking lot server 4 (Fig. 2), the hardware configuration of the ETC in-vehicle device 6 and the car navigation system 7 (Fig. 4), and the hierarchical structure of the communication protocol (Fig. 5) are the first implementations. Since it is the same as that of a form, the detailed description is abbreviate | omitted. In the present embodiment, the configuration of the parking lot server 4 shown in FIG. 2 is configured such that the reservation information database 22 and the reservation information verification processing program 24 are not provided.

  FIG. 10 is a sequence chart illustrating an example of a processing flow of the parking lot guidance system 1 according to the second embodiment. Hereinafter, the processing of the parking lot guidance system will be described by focusing on the difference from the first embodiment.

  As in the first embodiment, the roadside device 3 provided at the parking gate 2 of the parking lot is always performing a wireless communication operation, and checks whether or not a WCN transmission signal from the user vehicle 5 to be received has been received. (S401: WCN request). If the signal from the user vehicle 5 is not received, it waits as it is. When the user vehicle 5 that has reserved the parking lot approaches the warehousing gate 2 and enters the communication area of the roadside device 3, the roadside device 3 performs wireless communication with the ETC vehicle-mounted device 6 of the user vehicle 5 and is sent from the ETC vehicle-mounted device 6. WCN as incoming vehicle information is received (S402: WCN response).

  And the parking lot server 4 receives the WCN response notification by Broadcastcast from the roadside machine 3 (S403), performs an empty garage data search, and searches the empty garage data corresponding to the warehousing date of the user vehicle 5 ( S404). On the other hand, when DSRC wireless communication is performed between the roadside device 3 and the ETC in-vehicle device 6, an ASL connection is established between the roadside device 3 and the ETC in-vehicle device 6 (S405). Next, each process of connection notification (S406), screen display switching (S407), and IP connection establishment (S408) to be executed is the same as the process shown in FIG. 6 (S106, S107, S108) of the first embodiment. Therefore, detailed explanation is omitted.

  Next, the car navigation system 7 activates a predetermined application and requests the parking lot information from the parking lot server 4 (S409). The parking lot information here includes empty garage data at the time of warehousing in addition to map data in the parking lot.

  The parking lot server 4 that has received the parking lot information request transmits the parking lot information to the car navigation system (S410: parking lot information transmission step). At this time, the empty garage data at the time of warehousing has already been detected in the empty garage data search step (S404), and the parking location in which the pre-detection result is combined with the on-site map data stored in the parking lot map database 19 is combined. Processing is performed by returning the parking lot information. Then, the parking guidance is started in the car navigation system 7, and a parking guidance screen based on the parking lot information is displayed on the display screen as shown in FIG. 9C as in the first embodiment. (S411).

  Each process of the disconnection notification (S412) and the screen display switching (S413) to be executed next is the same as the process shown in FIG. 6 (S112, S113) of the first embodiment, and detailed description thereof is omitted.

  In the second embodiment described above, when a general user who does not have a reservation enters the parking lot, the parking lot server 4 searches for an empty garage position at the time of entry and displays the car navigation system 7. By displaying on the screen, it can be provided to the user. Similar to the first embodiment, the effects shown in the above (1) to (5) can be achieved.

In addition, you may change each said embodiment (1st Embodiment, 2nd Embodiment) as follows.
-In the said 1st Embodiment, it is good also as a structure combined with the reservation system reserved through the reservation center which manages a some parking lot. Moreover, it is not limited only to the reservation by WCN.

  In the first embodiment, the reservation information matching process step (S104) is executed before the connection notification step (S106), but this need not necessarily be the case. The flowchart of the process shown in FIG. 6 is an example. For example, the reservation information matching process step (S104) may be executed after the reservation information request step (S109) (= area information request step) from the car navigation system. The order of each step can be changed as appropriate. The same applies to the second embodiment.

  In the first and second embodiments, the parking lot guidance display is configured to display the parking lot map and the empty garage position (see FIG. 9C). The area information that is data related to a predetermined area such as the profit information of the store of the day may be displayed. These pieces of information may be displayed in place of the parking lot map or the empty garage position.

  -Furthermore, although explained as a parking lot guidance system, it is not a parking lot, but as a certain guidance area, for example, an area guidance system in an area such as a safari park where a user vehicle 5 is put into a predetermined site and the site is viewed. You may implement. In this case, the data transmitted from the area server (corresponding to the parking server 4 in the present embodiment) to the car navigation system 7 is a park map or the like showing in detail what is in the area. Such a map can be displayed on the display screen of the car navigation system 7 and used as a garden navigation device.

  ・ After entering the predetermined area, if the area is outdoor, the current position information of the user vehicle 5 is tracked by GPS, and more useful navigation is performed together with the detailed information in the area from the area server. You may make it implement.

In the first and second embodiments, the screen display switching step (FIG. 6: S107, FIG. 10: S407) for displaying the warehousing guidance screen (FIG. 9B) is not necessarily required.
In the above embodiment, the ETC in-vehicle device 6 is exemplified as the DSRC in-vehicle device. However, with the development of DSRC wireless communication, not only the ETC-dedicated DSRC in-vehicle device but various in-vehicle devices capable of various DSRC wireless communication can be employed. Further, the vehicle is not limited to a four-wheeled vehicle, but includes various moving bodies and ships including a two-wheeled vehicle. Furthermore, the DSRC in-vehicle device may be a portable mobile type or a wearable type without being fixed to the vehicle. Further, the car navigation system 7 and the ETC in-vehicle device 6 may be configured integrally.

  -At the time of delivery, the roadside machine 3 provided at the exit gate performs the same procedure as in the above embodiment from the parking lot server 4 to the area for future sales guidance and sale information of the store (area) that owns the parking lot. Information may be displayed on the display screen of the car navigation system 7. In this case, for example, it can be configured as shown in FIG. Each process of the WCN request (S501), WCN response (S502), ASL connection (S503), connection notification (S504), and IP connection (S505) is substantially the same as the above embodiment. When the IP connection is established, the car navigation system 7 requests the parking time server 4 for the information at the time of delivery via the DSRC wireless communication between the roadside device 3 at the exit gate and the ETC in-vehicle device 6 (S506). Then, the parking lot server 4 transmits the leaving information stored in the parking lot server 4 in advance to the car navigation system 7 (S507). Then, the exit information guidance is started on the display screen of the car navigation system 7, and the exit information is displayed on the display screen (S508). Thereafter, when a predetermined time elapses (for example, 1 minute), the display screen is automatically switched to the normal navigation screen (S509). In addition, the timing of this switching is switched to the normal navigation screen in response to the input of the exit information guidance instruction in the same manner as when the parking lot guidance in the above embodiment is terminated (see FIG. 8). It may be configured.

  According to such a configuration, area information can be acquired by the car navigation system 7 at the time of delivery and provided to the user. There is also a motivating effect that the user sees store information in the future and visits the store again, and the system is also effective as an advertising effect.

  In the first embodiment, the reservation information includes the WCN of the ETC in-vehicle device 6 and the desired date and time of warehousing (see FIG. 3). Further, if necessary, a credit number, License plate information, user name (personal name), vehicle classification, etc. may be used as reservation information. For example, when a credit number or a user name is adopted, the billing system at the time of delivery can be automatically implemented, and can be implemented in a manner corresponding to the request of the system operator and the user. .

  -In the said embodiment, although comprised so that it could pass through the warehousing gate 2 almost non-stop, depending on the procedure of each process step shown in FIG. 6, FIG. For example, a configuration in which the vehicle is temporarily stopped may be used.

Schematic which shows the system configuration | structure of the parking lot guidance system 1. FIG. The block diagram which shows the structure of the parking lot server 4 notionally. The figure which shows an example of a reservation information database notionally. The block diagram which shows notionally the hardware constitutions of the ETC vehicle equipment 6 and the car navigation system 7. FIG. The figure which shows the hierarchical structure of the communication protocol of the ETC vehicle equipment 6 and the car navigation system 7. The sequence chart which shows an example of the flow of a process of the parking lot guidance system 1 in 1st Embodiment. The flowchart which shows a reservation information collation process. The flowchart which shows a screen display switching process at the time of an end in detail. It is a figure which shows the example of a display screen transition of the car navigation system 7 at the time of warehousing, (a) is a normal navigation screen, (b) is a warehousing guidance screen, (c) is a parking space guidance screen. The sequence chart which shows an example of the flow of processing of the guidance system in a parking lot in a 2nd embodiment The sequence chart which shows an example of the flow of the information guidance process at the time of leaving in another embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Parking lot guidance system, 2 ... Entry gate, 3 ... DSRC roadside machine, 4 ... Parking lot server (area server), 5 ... User vehicle, 6 ... ETC vehicle-mounted machine (DSRC vehicle-mounted machine, guidance screen display device in parking lot) , 7 ... Car navigation system (parking area guide screen display device), 8, 9 ... LAN cable, 15 ... CPU (parking area information transmission means), 37 ... CPU (connection notification means), 41 ... Current position detection unit (current (Position acquisition means), 43... Image display section (display means, display screen), 51... CPU (parking information request means).

Claims (22)

DSRC roadside machine capable of DSRC wireless communication;
An area server connected to the roadside device so as to be communicable and having storage means for storing area information that is information related to an area where the DSRC roadside device is installed;
A DSRC in-vehicle device capable of DSRC wireless communication with the DSRC roadside device mounted on the user vehicle;
An in-vehicle computer connected to the DSRC in-vehicle device and having a display means for displaying an area information screen;
When the user vehicle enters the DSRC wireless communication area of the DSRC roadside device, the DSRC in-vehicle device and the DSRC roadside device perform DSRC wireless communication, and an ASL connection is established between the DSRC in-vehicle device and the DSRC roadside device. A connection notification step in which the DSRC in-vehicle device notifies the in-vehicle computer that the connection has been made;
The area information request step in which the in-vehicle computer that has received the notification in the connection notification step requests the area information from the area server;
After the area information request step, an area information transmission step in which the area server transmits the area information to the in-vehicle computer;
An area information display method comprising: performing an area information display step of displaying the area information screen on the display means based on the area information transmitted by the in-vehicle computer. 2. The area information display method according to claim 1, wherein the area information is in-area guide information including in-area map data, and an in-area guide screen is displayed on the display means. In the connection notification step, the DSRC in-vehicle device notifies the in-vehicle computer that the connection has been made after waiting for a predetermined time after the ASL connection is made between the DSRC in-vehicle device and the DSRC roadside device. The area information display method according to claim 1, wherein: The area information according to any one of claims 1 to 3, wherein the DSRC in-vehicle device and the in-vehicle computer are connected by a LAN, and the connection notification step is executed by broadcast transmission. Display method. The area information display method according to claim 4, wherein the area information requesting step is executed by IP connection to a predetermined IP address of the area server. 6. The IP address is set to a common IP address for area servers in different areas, and the in-vehicle computer stores the IP address in a predetermined storage unit in advance. The area information display method described. The area information display method according to any one of claims 1 to 6, wherein the DSRC in-vehicle device of the user vehicle is an ETC in-vehicle device. The in-vehicle computer is a car navigation system having current position acquisition means for acquiring current position information of a user vehicle and display means for displaying the current position of the user vehicle on a map image based on the current position information. The area information display method according to claim 1, wherein the area information display method is provided. Upon receipt of the notification in the connection notification step, the in-vehicle computer switches the display screen of the in-vehicle computer from the normal navigation screen for navigating the user vehicle to the target area to the entry guidance screen for the area. The area information display method according to claim 8, further comprising executing a step. The in-vehicle computer has an end instruction input means for inputting the end of the on-site guidance, and further executes an end-time screen display switching step for switching the area information screen displayed on the display means to the normal navigation screen. 10. The area information display method according to claim 8, wherein the area information is displayed. The area information includes empty garage data for each predetermined date and time in the area, and the area server searches for empty garage data corresponding to the warehousing date and time of the user vehicle from the empty garage data stored in the storage means. Perform further data retrieval steps,
The area information display step includes an empty garage position at the time when the user vehicle has entered based on the in-area map data and the empty garage data at the time of entry of the user vehicle retrieved in the empty garage data retrieval step. The area information display method according to any one of claims 1 to 10, wherein an area information screen is displayed. 12. The area information display method according to claim 11, wherein the area server that has received an access by broadcast transmission from the DSRC roadside machine executes the empty garage data search step before the connection notification step. The storage means of the area server further stores reservation information including at least an identification code that can identify the DSRC in-vehicle device of the user vehicle and a desired warehousing date and time desired by the user,
The area server includes an identification code received from the DSRC in-vehicle device by the DSRC roadside device when the user vehicle is close to a storage gate where the DSRC roadside device is installed, and the reservation stored in the storage means. 13. The reservation information collation processing step is performed to collate whether or not the identification code of the information matches, and to perform a predetermined process according to the collation result. 13. The area information display method described. 14. The area information display method according to claim 13, wherein the area server that has received an access by broadcast transmission from the DSRC roadside device executes the reservation information collation processing step before the connection notification step. 15. The area information display method according to claim 13, wherein the identification code is a wireless call number. DSRC roadside machine capable of DSRC wireless communication;
A parking lot server that is communicably connected to the DSRC roadside machine and has storage means for storing parking lot information including map data in the parking lot;
A DSRC in-vehicle device mounted on a user vehicle;
An in-vehicle computer that is communicably connected to the DSRC in-vehicle device and has display means for displaying the parking lot information;
With
The DSRC in-vehicle device performs DSRC radio communication between the DSRC in-vehicle device and the DSRC roadside device when the user vehicle enters the DSRC radio communication area of the DSRC roadside device, and the DSRC in-vehicle device and the DSRC roadside An ASL connection is established with the machine, and the DSRC vehicle-mounted machine has a connection notification means for notifying the vehicle-mounted computer that the connection has been made,
The in-vehicle computer has a parking lot information requesting unit that requests the parking lot information to the parking lot server after receiving the notification from the connection notification unit,
The parking lot server has a parking lot information transmission unit that transmits the parking lot information to the in-vehicle computer when there is a parking lot information request by the parking lot information request unit.
The on-vehicle computer includes a parking lot guidance display unit that displays a parking lot guidance screen based on the parking lot information after receiving the parking lot information. The in-parking guidance system according to claim 16, wherein the DSRC in-vehicle device of the user vehicle is an ETC in-vehicle device. The in-vehicle computer is a car navigation system having current position acquisition means for acquiring current position information of a vehicle and display means for displaying the current position of the user vehicle on a map image based on the current position information. The parking lot guidance system according to claim 16 or claim 17, characterized in that: The DSRC in-vehicle device in the parking lot guidance system according to any one of claims 16 to 18. The in-vehicle computer in the parking lot guidance system according to any one of claims 16 to 18. An in-parking guidance screen display device comprising: the DSRC in-vehicle device in the in-parking guidance system according to claim 19; and the in-vehicle computer in the in-parking guidance system according to claim 20. The parking screen guide screen display device according to claim 21, wherein the in-vehicle computer is configured integrally with the DSRC in-vehicle device.

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