JP2003263700A - Parking lot full/vacancy information data base generation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive parking lot full/vacancy information data base generating system capable of easily collecting providing vehicle parking information without considering the setting place of a sensor. <P>SOLUTION: The position of the present vehicle detected by a GPS device 1 is collated with parking lot position information stored in a parking lot position information data base 2 by an entering/leaving detecting device 3, and when the entering/leaving of the present vehicle to the parking lot is detected by each vehicle side, the parking information is transmitted from communication equipment 4 to a center server. In the center server, the full/vacancy condition of each parking lot is judged based on the parking information, and stored in a parking lot full/vacancy information data base as full/vacancy information. The full/vacancy information is Internet-distributable by an information distributing server in response to a request. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking lot fullness information database generation system capable of detecting a fullness of a parking lot and providing the fullness information to a required place.

[0002]

2. Description of the Related Art Although information about the availability of a parking lot in a service area such as an expressway can be viewed on an electronic bulletin board provided on the expressway, the places where the electronic bulletin board is installed and the displayed contents are very limited. , Only a few can meet a wide range of driver needs. Therefore, it is desired that the driver can easily obtain the availability information at the parking lot that he / she wants to know anytime and anywhere by using "i-mode" (trade name) which can connect to the Internet from the mobile phone.

In order to make the above-mentioned full-vacancy information available on the Internet, a sensor for counting the number of parked vehicles is first provided in order to create a database of full-vacancy information for parking lots, and then the count number acquired by this sensor is used. Based on this, the current number of parked vehicles is determined and the information is transmitted to the parking lot information server (center server) via the network. If the information about parking lots collected on the center server side is published on the Internet, anyone can view the information.

As a method of counting parked vehicles, a method of providing an infrastructure such as a sensor on the parking lot side and a method of providing an infrastructure such as a sensor other than the parking lot are known. The former method uses a camera (for example, Japanese Patent Laid-Open No.
No. 00-137986 and Japanese Patent Laid-Open No. 11-283197.
(E.g., the technology described in Japanese Patent Laid-Open No. 6-266999 or 7-73399), or the entrance / exit of a parking lot. There is a method of counting the rise and fall operation of the gate installed in the relay sensor by sensing it with a relay sensor.

On the other hand, as the latter method, a camera captures an image of a corresponding position area of a parking lot from an artificial satellite located above the parking lot, and the presence or absence of a parked vehicle is counted by image analysis to generate full sky information. (For example, JP-A-11-1
44195). The parked vehicle information detected by any of the above sensors is transmitted to the center server using, for example, "DoPa network" (trade name) of NTT-DoCoMo, and the server that aggregates the parked vehicle information is stored in the parking lot. By making it possible to browse the blank information on the Internet, it becomes unnecessary to provide a special network for transmitting the aggregated full-blank information data.

[0006]

Among the methods for counting the number of parked vehicles by providing a sensor on the parking lot side, the one using a camera or radio waves / sound waves is expensive and uses a parking lot entrance / exit gate. Although the cost is lower than that of the method using radio waves and sound waves, it is not preferable because the device becomes large and cannot be installed depending on the place, and the transit time becomes longer. In addition, the method of using the camera of the artificial satellite is not only expensive, but may not always be compatible depending on the place, such as an indoor parking lot.

Therefore, in view of the problems of the above-described conventional counting method, the present invention is a parking lot at a lower cost and capable of easily collecting and providing information on the vehicle parking status without being restricted by the installation location of the sensor. The object is to provide a full-space information database generation system.

[0008]

Therefore, in the parking lot fullness information database generating system according to the first aspect of the present invention, the device on the vehicle side detects the own vehicle position detecting means for detecting the position of the own vehicle and the parking lot position. The stored parking lot position storage means, the positional information of the own vehicle obtained by the own vehicle position detection means, and the positional information of the parking lot stored in the parking lot position storage means are collated, and the own vehicle enters the parking lot. Entry / exit detection means capable of detecting exit / exit and the entry / exit detection means for entering / exiting the own vehicle into the parking lot
A center server side communication means capable of transmitting information about the parking to the center server when the exit is detected, the center server being capable of communicating with the vehicle side communication means, and the center server. A full-vacancy state determination means for determining the full-vacancy state of the parking lot from the information on the entry and exit of the vehicle to the parking lot obtained via the side communication means, and a determination result obtained by the full-vacancy state determination means It is assumed to have a full-vacancy information holding means for holding as information and an information providing means capable of providing the full-vacancy information held in the full-vacancy information holding means in response to a request.

According to a second aspect of the present invention, the full state determination means corrects the number of parked vehicles, which is obtained based on the information relating to the entry and exit of vehicles to and from the parking lot, by the installation rate of the vehicle-side device, and becomes full. It was decided to judge the state.

According to a third aspect of the present invention, the mounting rate is set according to the area where the parking lot is present. According to a fourth aspect of the invention, the mounting rate is set according to the attributes of the vehicle.

According to the invention of claim 5, the information providing means is
It is assumed that full-space information is provided via the Internet.

According to a sixth aspect of the present invention, there is provided a vehicle-side device for a parking lot full / vacant information database generation system, which includes a vehicle position detecting means for detecting the position of the own vehicle and a parking lot for storing the position of the parking lot. The entry / exit of the own vehicle to / from the parking lot is detected by comparing the location information of the own vehicle obtained by the vehicle location detection means with the location information of the own vehicle obtained by the own vehicle position detection means and the location information of the parking lot stored in the parking lot location storage means. And a vehicle-side communication unit capable of transmitting information about the parking to the center server when the entry / exit detection unit detects entry / exit of the own vehicle into / from the parking lot. .

According to a seventh aspect of the present invention, the information about parking includes identification information of a parking lot and identification information of entry / exit to and from the parking lot. The invention of claim 8 is
The information on parking includes information on the attributes of the own vehicle.

The present invention of claim 9 is a center server for a parking lot vacancy information database generating system,
A center / server side communication means capable of communicating with the vehicle side device;
A vacancy determination means for determining the vacancy status of the parking lot based on the information about the entry / exit of the vehicle into / from the parking garage obtained through the center / server side communication means, and a determination obtained from the vacancy status determination means A full-vacancy information holding means for holding the result as full-vacancy information and an information providing means capable of providing the full-vacancy information held in the full-vacancy information holding means in response to a request are provided.

According to a tenth aspect of the invention, the number of parked vehicles obtained by the full state determination means based on the information on the entry / exit of the vehicle into / from the parking lot obtained through the center / server side communication means is defined as It was decided to determine the full state by making a correction based on the installation rate of the side equipment.

[0016] According to the invention of claim 11, the mounting rate is set according to an area where a parking lot is present.
According to a twelfth aspect of the present invention, the mounting rate is set according to the attributes of the vehicle.

According to a thirteenth aspect of the present invention, the information providing means provides full-vacancy information via the Internet.

[0018]

According to the first aspect of the present invention, the vehicle position information detected by the vehicle-side device is compared with the stored parking lot position information, and when the entry / exit to / from the parking lot is determined,
The parking information is transmitted to the center server. The center server determines the fullness state of the parking lot based on the received parking information and stores the result, and provides the stored fullness information when requested. Therefore, it is not necessary to specially install a sensor for counting the parked vehicles in the parking lot or the artificial satellite above this, and it is only necessary to use the car navigation device and communication means of the vehicle whose mounting rate is increasing more, It will be possible to easily count the number of parked vehicles at any parking lot without worrying about the installation location at low cost, and to provide the availability information of the parking lot via the Internet or the like.

According to the second aspect of the present invention, even if there is a vehicle that does not have a vehicle-side device capable of detecting entrance / exit to and from the parking lot and transmitting parking information, the vehicle-side device can be used. Since the installation rate of the vehicle is investigated and grasped in advance and the number of parked vehicles counted from the parking information obtained from the vehicle equipped with the vehicle side device is corrected by the installation rate, it is determined whether the parking lot is full. Will be possible with higher accuracy.

According to the invention of claim 3, the installation rate for each region (for example, Kanto, Hokkaido, etc., or a region narrower than these may be investigated and grasped in advance), and according to the parking lot in that region. Since the installation rate is set, it is possible to determine the fullness of the parking lot with higher accuracy.

According to the invention of claim 4, these identification information is parked by previously investigating and ascertaining the installation rates of the vehicles according to their attributes, for example, passenger cars or trucks (small cars or large cars). Since it is included in the information and the installation rate is set, it is possible to determine the fullness of the parking lot with higher accuracy. Further, it is possible to improve the accuracy particularly when the parking frame is different for each vehicle type such as a service area of a highway.

In the invention of claim 5, since the information providing means of the center server can be used on the Internet, it is possible for a driver or the like to always check the availability information of each parking lot at any place without constructing a new information transmission system. Can be viewed.

According to the sixth aspect of the present invention, the device on the automobile side determines the entry / exit to and from the parking lot by detecting the own vehicle position information and comparing it with the stored parking lot position information. To communicate with the center server, it is possible to easily obtain the count information of parked vehicles only by using the car navigation device (vehicle position detection means) and the communication means, which are becoming more and more installed. Is possible. As a result, it is not necessary to provide a special device such as a sensor in the parking lot or an artificial satellite above the parking lot.

According to the invention of claim 7, the device on the vehicle side issues the identification information of the parking lot where the own vehicle enters and leaves and the identification information such as whether the own vehicle enters or leaves the parking lot. It is possible to make the minimum information necessary for detecting the fullness of each parking lot.

According to the eighth aspect of the present invention, the parking information issued by the vehicle-side device includes the attribute of the own vehicle, for example, whether the vehicle is a passenger car or a truck. Even in the period, it can be used as information for estimating the total number of parked vehicles with higher accuracy.
In particular, the accuracy can be improved when the parking frame is different for each vehicle type such as a service area of a highway.

In the invention of claim 9, the center server is
Based on the parking information received from the vehicle side, the fullness of the parking lot is judged, the result is stored and saved, and the fullness information can be submitted upon request. You will be able to get the full availability information of parking lots anytime, anywhere without the need to build a special network.

According to the tenth aspect of the invention, the center server determines the full state by correcting the number of parked vehicles obtained on the basis of the parking information received from the vehicle side communication means by the installation rate of the vehicle side equipment. Therefore, even during a transitional period when there is a vehicle in which the vehicle-side device is not mounted, it is possible to more accurately determine the full-vacancy status of each parking lot.

In the eleventh aspect of the present invention, since the installation rate is set according to the area where the parking lot is located (for example, Kanto or Hokkaido), it is possible to determine the fullness of the parking lot with higher accuracy. Like

According to the twelfth aspect of the present invention, since the installation rate is set according to the attribute of the vehicle (for example, whether it is a passenger car or a truck), it is possible to judge the fullness of each parking lot with higher accuracy in this case as well. Will be able to. In particular, the accuracy can be improved when the parking frame is different for each vehicle type such as a service area of a highway.

According to the thirteenth aspect of the present invention, since the information providing means can use the Internet, it is possible for the driver or the like to browse the full-vacancy information of each parking lot at any place at any time without constructing a new information transmission system. Become.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the embodiment, it is configured as a parking lot full / vacant information database generation system that transmits parking information from the vehicle side device to the parking lot information server (center server) side. First, of these, the configuration of the vehicle-side device will be described. In FIG. 1, the GPS device 1 includes a plurality of GPS devices.
(Global Positioning System) It receives the positioning signal from each satellite and detects the position of the own vehicle. The GPS device 1 constantly monitors the current position of the vehicle.

The parking lot position information database 2 is a database relating to the position information of each parking lot nationwide,
It is stored in a storage medium such as a CD-ROM (compact disc read only memory). The position information is a shape (shape) viewed from the sky above each parking lot, which is stored as a polygon using a longitude / latitude coordinate system.

That is, for example, the parking lot ID is 1001.
As shown in (a) of FIG. 2, the parking lot position information indicates that the shape of the actual parking lot is, for example, a plurality of vertices X1, X.
, ..., X13 (in this case, the number of vertices is 13, but the number of vertices is different in each parking lot) is roughly displayed in a polygonal shape made up of line segments. And
As shown in (b), the parking lot IDs 1001 and 100
2, ..., Coordinate groups (x1, x2, ..., x13) of vertices when the parking lot is displayed in a polygon, (y1, y
2, y3, ...), ... And stored in the parking lot position information database 2.

The entrance / exit detection device 3 compares the position information of the own vehicle obtained from the GPS device 1 with the position information of the parking lot obtained from the parking lot position information database 2, and the vehicle enters the parking lot equivalent area. And it judges that it has entered the parking lot. After that, if the vehicle does not leave the position for a certain period of time, it is determined that the vehicle is parked, and if the vehicle moves from the state determined to be this parking state and deviates from the parking lot equivalent area, It is configured to judge that the parking lot has been exited.

The communication device 4 determines, according to the determination result of the entry / exit detection device 3, "the ID of the parking lot that has entered / exited, the attributes of the own vehicle (passenger car or truck, etc.), and the entry / exit of the parking lot. Parking information such as "identification information" is transmitted to the center server side including the communication device 5 described later. As the communication devices 4 and 5, for example, NTT-DoC
The "DoPa network" of oMo is used. Therefore, since this communication network is based on packet communication and uses a pay-per-use system, the communication devices 4 and 5 are in a kind of always connectable state.

Next, the structure of the center server will be described with reference to FIG. The communication device 5 receives parking information regarding entry and exit from the parking lot from the communication device 4 on the vehicle side. When the parking lot database management device 6 receives the parking information regarding entry / exit from the communication device 5, the parking lot database management device 6 searches the data of the parking lot full / vacant information database 7 to be described later, and the “parking lot ID” included in the parking information and Based on the "attribute of the own vehicle", the counter of the number of parkings classified by vehicle type in the corresponding parking lot is incremented when the vehicle is admitted and decremented when the vehicle is leaving.

The parking lot full / vacancy information database 7 is a database that stores the number of parking lots of each parking lot by vehicle type, and can be queried by SQL (Structure Query Language) such as Oracle (trademark). Na RDB
MS (Relational Database Management
System).

The parking lot fullness information database 7 is composed of a queryable database group. For example, as shown in FIG. 4, a data group such as a parking lot ID, a regional attribute ID, the number of parking lots by vehicle type, a parking count, and a fullness index. Further, the area-based installation rate database 11 including a data group such as an installation rate corresponding to the area attribute, and a vehicle type including a vehicle type attribute corresponding to the number of parkings by the vehicle type and a data group such as an installation rate corresponding to the vehicle type attribute Wearing rate database 12
And have. Incidentally, in these databases, data examples are omitted in the figure.

The full-space information associating device 8 converts the current parking count number by using the installation rate of the vehicle-side device preset based on the survey, thereby estimating the unmounted vehicles. A fullness information index (for example, "empty", "crowded", "slightly congested", "congested") is generated.

As for the installation rate, some vehicles do not have the equipment on the vehicle side installed so that the accuracy is improved. First, the installation rate for each area (for example, 80% for a parking lot in Tokyo). , The parking rate in Okinawa is 60%), the installation rate corresponding to the parking ID is selected from the area-based installation rate database 11 created in advance. The number of wearings and the number of parkings are used for conversion into the above-mentioned sky information index. Secondly, the installation rate of the vehicle-side device is a vehicle-specific installation rate database 12 in which an installation rate (also investigated in advance) corresponding to each vehicle type (passenger car or truck) is determined from a vehicle ID indicating a vehicle attribute. The sky information index is updated.

The vacancy information distribution server 9 is connected to the parking lot vacancy information database 7, and for example Apache.
WWW server programs such as
The WW browser 10 enables a user such as a driver or an administrator to search the Internet.

The operation of the parking lot full / vacant information database generation system including the above-mentioned vehicle side device and the center server will be described below. During operation of the vehicle, the GPS device 1 constantly receives the radio signal from the GPS satellite to detect the position of the vehicle. The entry / exit detection device 3 constantly collates the own vehicle position coordinate data with the coordinate group data of the parking lot area shown in FIG. 2 of the parking lot position information database 2.

The entry / exit detection device 3 determines that the vehicle has entered the parking lot when the coordinate data of the vehicle position enters the coordinate group of the parking lot equivalent area by the above-mentioned comparison. As a result, this parking lot entry information is
It is distributed from the communication device 4 on the vehicle side to the center server as parking information data such as "D, attribute of own vehicle, entry to the parking lot".

In the center server, when the communication device 5 receives the parking information of the entrance, the parking lot database management device 6 receives the "parking lot ID" and the "attribute of the own vehicle" (whether it is a passenger car or a truck). ), The parking lot fullness information database 7 is searched, and the counter for the number of parking lots by vehicle type of the corresponding parking lot is incremented in the parking lot fullness information database 7 shown in FIG.

Next, the full-space information associating device 8 selects a corresponding installation rate from the area-based installation rate database 11 and the vehicle-specific installation rate database 12, respectively, based on the received parking lot ID and vehicle type attribute information. The fullness information index is generated by converting the wearing rate and the current parking count number, and is recorded and held in the parking lot fullness information database 7.

The above-mentioned full-space information can be viewed by a driver or the like by accessing the full-space information distribution server 9 using the WWW browser 10. That is, when a user such as a driver queries the availability information of a parking lot in a specific area via the WWW browser 10 using a form, the availability information distribution server 9 searches for a CGI (Common Gateway Interface). Start the program. This CGI program is written in something like Perl and searches the parking lot fullness information database 7 by SQL, and retrieves information such as the fullness index of the parking lot corresponding to the area. The search result is converted to HTML format and transmitted to the user's WWW browser 10 in tabular format.

As described above, in the parking lot fullness information database generation system according to the present embodiment, the vehicle-side device detects the position of the own vehicle and compares it with the position information of the parking lot so that the parking lot is parked. Judging entry / exit to and from the parking lot,
Since it is sent to the center server, no special infrastructure for vehicle detection is provided in the parking lot as in the past.
By utilizing the own vehicle position detecting device and the communication device mounted for the purpose of car navigation or the like, it is possible to collect parking information in the center server.

As a result, no special infrastructure such as a sensor on the parking lot side or an artificial satellite camera is required to detect parking, and it can be used in a place where the installation of the sensor is restricted.
The vehicle-side GPS device and communication device required for this system are used for other purposes such as car navigation and internet connection, and are being installed in almost all vehicles. Cost is enough.
In addition, in the transient period in which the installation rate is in progress, it is sufficient to correct the parking count in consideration of the installation rate. Further, since the parking information transmitted from the vehicle side includes the attribute of the vehicle, it is possible to more accurately predict the full parking situation.

Then, the center server which has received the parking information from the vehicle-side device increments or decrements the parking count number of the parking lot full / vacant information database 7 according to the received information so that the full / vacant information associating device 8 is provided. Since the fullness index is created and stored in the parking lot fullness information database 7 and the internet is available on the fullness information distribution server 9, the user can easily set the fullness state of each parking lot anytime anywhere. It becomes possible to browse. In the creation of the above-mentioned fullness index, the parking count is converted by using the installation rate of the vehicle-side device according to the area where the parking lot is located and the attribute of the parked vehicle, so that the installation rate of the vehicle-side device becomes 100%. It is possible to improve the prediction accuracy of the full state even in a transitional period when it does not reach.

Although the GPS device 1 is used to detect the position of the host vehicle in the embodiment, an autonomous navigation device using a gyro or the like or a position detecting device using both of them is used instead. You may.

In addition, the full-space information distribution server 9 uses Apac
It is possible to build on a Servlet base such as he + Tomcat, or it is possible to implement it by arranging an agent place that is a target of a visit of a parking lot information acquisition mobile agent. In the latter case, the mobile agent, who has the information about which area of the parking lot he / she wants to know about the parking lot, visits the fullness information distribution server. In that case, as in the case of the above-mentioned CGI, an appropriate parking lot availability information is retrieved from the parking lot availability information database and passed to the mobile agent. The mobile agent patrols a plurality of full-space information disclosure servers and legacy full-space information database systems, and presents the user with information about the finally empty parking lot. In this way, if the mobile agent format is used, it becomes possible to cooperate with the legacy parking information full / vacant information system based on the sensor infrastructure of the parking lot that coexists with this system.

Further, in this system, it is possible to discriminate between the parking lots in which the vehicles are vertically stacked, and to check the G range in a wide range.
When the entrance / exit determination is difficult in a place where it is difficult to receive the PS signal, it is possible to cooperate with the legacy system as described above. For these linkages, it is desirable to arrange the mobile agent type server as described above or to integrate the database of this system and the database of the legacy system so that users can use them without distinction.

Further, it is necessary to transmit several bytes of data to transmit the entrance / exit information of the parking lot. When using the current DoPa, the fee is charged to the driver, but since it is a transmission for making parking information available to many people, acknowledge its contribution and refer to parking information It is desirable to introduce a special fee system that offsets communication charges at the time. This makes it possible for any of the information providers, recipients, and telecommunications carriers to make a profitable model, which further promotes its dissemination.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a vehicle-side device that constitutes a parking lot fullness information database generation system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a parking lot shape and its position information.

FIG. 3 is a diagram showing a configuration of a center server that constitutes a parking lot fullness information database generation system.

FIG. 4 is a diagram showing an example of a parking lot full / vacant information database.

[Explanation of symbols]

1 GPS device 2 Parking lot position information database 3 Entry / Exit detection device 4,5 communication device 6 Parking lot database management device 7 Parking lot information database 8 Full-space information association device 9 sky information distribution server 10 WWW browser 11 Regional Wear Rate Database 12 Vehicle Attachment Rate Database

Claims (13)

[Claims] 1. A vehicle-side device, a vehicle position detecting means for detecting a position of the vehicle, a parking lot position storing means for storing a position of a parking lot, and an own vehicle obtained by the vehicle position detecting means. An entry / exit detection unit capable of detecting entry / exit of the own vehicle to / from the parking lot by comparing the position information with the parking lot position information stored in the parking lot position storage unit, and the entry / exit detection unit A vehicle-side communication unit capable of transmitting information about the parking to the center server when the entry / exit of the vehicle to / from the parking lot is detected, and the center server is capable of communicating with the vehicle-side communication unit; A server-side communication means, a full-vacancy-state determining means for determining a full-vacancy state of the parking lot based on information about entry / exit of the vehicle into / from the parking lot obtained through the center / server-side communication means, and the full-vacancy state Judgment result obtained by state judgment means Is stored as full-space information, and information providing means capable of providing the full-space information held in the full-space information holding means in response to a request. Parking lot information database generation system. 2. The full state determination means determines the full state by correcting the number of parked vehicles, which is obtained based on the information regarding entry / exit of the vehicle into / from a parking lot, by the installation rate of the vehicle side device. The parking lot full / vacant information database generation system according to claim 1. 3. The parking lot fullness information database generation system according to claim 2, wherein the installation rate is set according to an area where the parking lot exists. 4. The parking lot full / vacancy information database generation system according to claim 2, wherein the installation rate is set according to an attribute of the vehicle. 5. The parking lot full / vacant information database generation system according to claim 1, wherein the information providing means provides the full / vacant information via the Internet. 6. A own vehicle position detecting means for detecting the position of the own vehicle, a parking lot position storing means for storing the position of a parking lot, position information of the own vehicle obtained by the own vehicle position detecting means, and the parking. An entry / exit detection unit capable of detecting entry / exit of the own vehicle into / from the parking lot by collating with position information of the parking lot stored in the parking lot position storage unit, and the entry / exit detection unit being the parking lot of the own vehicle A vehicle-side device for a parking lot full / vacant information database generation system, comprising vehicle-side communication means capable of transmitting information regarding the parking to the center server upon detection of entry / exit to / from the vehicle. 7. The vehicle-side device according to claim 6, wherein the information regarding parking includes identification information of a parking lot and identification information of entry / exit of the parking lot. 8. The vehicle-side device according to claim 7, wherein the information about parking further includes information about an attribute of the own vehicle. 9. A full-vacancy state of a parking lot based on a center-server-side communication means capable of communicating with a vehicle-side device and information about entry / exit of a vehicle into / from a parking lot obtained through the center-server-side communication means. A full-vacancy state determining means, a full-vacancy information holding means that holds the determination result obtained from the full-vacancy state determining means as full-vacancy information, and a full-vacancy information holding means that holds the full-vacancy information holding means upon request. A center server for a parking lot vacancy information database generation system, comprising: an information providing means capable of providing vacancy information. 10. The full-state determination means determines the number of parked vehicles, which is obtained based on the information regarding entry / exit of vehicles into / from a parking lot, obtained through the center / server-side communication means, from the vehicle-side device. 10. The center server according to claim 9, wherein the center server determines whether the vehicle is fully emptied by making a correction based on a mounting rate. 11. The center server according to claim 10, wherein the installation rate is set according to an area where a parking lot is present. 12. The center server according to claim 11, wherein the installation rate is set according to an attribute of the vehicle. 13. The center server according to claim 9, wherein the information providing unit provides the full-vacancy information via the Internet.