Price assessing system and purchase-sale mediating system for used car

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a used car price assessment system that assesses the trade-in price of a vehicle equipped with an in-vehicle communication module connected to the Internet via a mobile communication network, and a used vehicle sales brokerage system that mediates the sale and purchase of the vehicle. ..

【0002】

[Conventional technology]

In recent years, due to the spread of the Internet, trade-in of the vehicle currently in use can be done by inputting the vehicle model, model year, registration date, next vehicle inspection date, mileage, etc. from a personal computer connected to the Internet. There is a service to estimate the price. In online used car distribution, used cars acquired by used car distributors are registered and published on sites such as the Internet, and users who wish to purchase used cars can access this site to access used cars. There is a business that promotes the buying and selling of cars.

【0003】

[Problems to be Solved by the Invention]

However, when checking the assessed price of a vehicle you own on an Internet site, data such as the model, year, registration date, next vehicle inspection date, and mileage of the vehicle you own is stored in advance. Then, it is necessary to input these data from a personal computer connected to the Internet. For this reason, not only the input work is troublesome, but also an erroneous input occurs, which causes a problem that an accurate price assessment cannot be performed.

【0004】

In addition, in online used car distribution, the used car distributor must become the owner of the traded-in used car, so the used car owned will be in stock of the used car distributor until the sale is completed. .. For this reason, it becomes necessary to secure a sufficient space for storing the used car, and the price of the used car purchased becomes receivable until the sale is completed. For this reason, it is necessary to secure more funds than necessary, and there is also a problem that the interest rate for this is enormous.

【0005】

Therefore, the present invention has been made to solve the above-mentioned problems, and the price assessment of the vehicle used by the user can be performed in real time via the in-vehicle communication module mounted on the vehicle. The purpose of the system is to provide a sales brokerage system that can broker the sale and purchase of used cars in real time without the broker owning the used car.

【0006】

[Means for solving problems]

In order to achieve the above object, the used car price assessment system of the present invention is provided on the Internet with a mobile terminal consisting of an in-vehicle communication module connected to the Internet via a mobile communication network and a database of trade-in prices of used cars. It consists of a connected web server, and by operating the transmission switch of the assessment request connected to the in-vehicle communication module, the in-vehicle communication module requests the web server to assess the used car price via the mobile communication network and the Internet. Is transmitted, and the web server searches the vehicle price database of the used car for the trade-in price of the vehicle to be the mobile terminal, and notifies the in-vehicle communication module of the search result via the Internet and the mobile communication network.

【0007】

This makes it possible to determine the assessed price of the vehicle used by the user in real time via the in-vehicle communication module mounted on the vehicle, and the model, year, and registration year of the vehicle owned by the user. It is possible to provide a used vehicle price assessment system that can automatically assess the price of the vehicle without inputting data such as the date, the next vehicle inspection date, and the mileage.

【0008】

In this case, the in-vehicle communication module has a memory for storing vehicle inspection information such as vehicle owner / user, vehicle type / model, registration date, color / fuel, mileage information, and maintenance information, and communication for transmission and reception. A unit and an external interface for exchanging data with the vehicle are provided, and the information stored in the memory is sequentially updated based on the mileage information sequentially acquired via the external interface, and the information of the vehicle is sequentially updated. It is desirable to update the vehicle inspection information and maintenance information one by one every time it is updated.

【0009】

This makes it possible to determine the assessed price of the vehicle used by the user in real time via the communication module mounted on the vehicle, and the model, year, and registration date of the vehicle owned by the user. It is possible to provide a used car price valuation system that can automatically valuate the price without inputting the date, the next vehicle inspection date, the mileage, and the like.

【0010】

Further, the used car sales brokerage system of the present invention includes a mobile terminal composed of an in-vehicle communication module connected to the Internet via a mobile communication network, a used car trade-in price database, and a used car database on the Internet. It consists of a connected web server and a client that can connect to the Internet, and by operating the transmission switch of the registration request connected to the in-vehicle communication module, the web server from the in-vehicle communication module via the mobile communication network and the Internet. The web server registers the vehicle information in the used car database based on the vehicle information registration request, and the web server registers the vehicle information in the used car database based on the vehicle information registration request, and also based on the used car database search request from the client. It searches from the database and notifies the client of the search result via the Internet. This makes it possible to provide a sales brokerage system that allows a broker to broker the sale and purchase of a used car in real time without owning the used car.

【0011】

In this case, when the client inquires the web server about the purchase of a used car that matches the search request based on the search result, the web server sends the information of the purchase inquiry to the in-vehicle communication module of the vehicle that matches the purchase inquiry. Notifications are made via the Internet and the mobile communication network. Then, when the purchase request from the client is notified to the web server, the web server notifies the in-vehicle communication module of the vehicle via the Internet and the mobile communication network to notify the purchase request. By operating the transmission switch for buying and selling requests connected to the in-vehicle communication module based on the above, the in-vehicle communication module sends a buying and selling request to the web server via the mobile communication network and the Internet, and the web server moves to the Internet. The in-vehicle communication module is notified of the remote diagnosis via the communication network, and the in-vehicle communication module is sequentially updated from the memory provided in the in-vehicle communication module based on the notification of the remote diagnosis. The diagnosis result consisting of vehicle inspection information is acquired, and the acquired diagnosis result is transmitted to the web server via the mobile communication network and the Internet.

【0012】

Then, when the web server receives the diagnosis result consisting of the mileage information, the maintenance information, and the vehicle inspection information transmitted from the in-vehicle communication module, the web server sends the diagnosis result to the client of the purchase request via the Internet. ing. As a result, the user who is the client who requested the purchase of the used vehicle can know the current mileage information, maintenance information, and vehicle inspection information of the vehicle in real time. As a result, it becomes possible to provide a sales brokerage system capable of brokering the sale and purchase of used cars in real time without the broker owning the used car.

【0013】

BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. It should be noted that FIG. 1 is a diagram schematically showing the configuration of the used car price assessment system and the sales brokerage system of the present invention. FIG. 2 is a functional block diagram showing the configuration of the communication module of the present invention. FIG. 3 is a diagram showing a configuration example of a communication device composed of the communication module of FIG. 2 and the device of the vehicle.

【0014】

1. Price assessment system and sales brokerage system As shown in FIG. 1, the configuration of the used car price assessment system and the sales brokerage system of the present invention includes a vehicle 10A equipped with an in-vehicle communication module 10 (see FIG. 2) and a mobile terminal, and a mobile communication network 40. The base station 42 to be configured, the mobile communication network 40 equipped with an in-network database for managing subscriber data of mobile terminals, the Internet 50 connected to this mobile communication network 40 via a gateway, and the trade-in price of a used car. It consists of a web server 51, which has a database 52 and a database 53 of used cars and is connected to the Internet 50, and clients 54 of a large number of users who use these services.

【0015】

Here, a used car price assessment system is configured by a vehicle 10A equipped with an in-vehicle communication module 10, a mobile communication network 40, an Internet 50, and a web server 51 equipped with a used car trade-in price database 52. .. On the other hand, the used car sales brokerage system is a web equipped with a vehicle 10A equipped with an in-vehicle communication module 10, a mobile communication network 40, an Internet 50, a used car trade-in price database 52, and a used car database 53. It consists of a server 51 and a client 54.

【0016】

As shown in FIG. 2, the in-vehicle communication module 10 mounted on the used car 10A is a communication module that operates as a mobile terminal of an existing mobile communication network, and is provided with an antenna terminal T1 to which the antenna A is connected. There is. The antenna A connected to the antenna terminal T1 via a coaxial cable is attached to the roof of a vehicle or the like. An RF circuit 11 is connected to the antenna terminal T1, and the RF circuit 11 is provided with a transmission / reception circuit and a modulation / demodulation circuit.

【0017】

A voice codec circuit 12 and a channel codec circuit 13 are connected to the modulation / demodulation circuit of the RF circuit 11, and the voice codec circuit 12 decodes the received signal or the voice signal demolished by the modulation / demodulation circuit and transmits the input signal. The signal is voice-compressed codec. That is, the voice codec circuit 12 encodes the voice for transmission with high efficiency compression coding and decodes it into the voice for reception or the voice for reproduction, and is regarded as a CELP (Code Excited LPC) type codec, for example. .. The voice codec circuit 12 is connected to the voice input / output terminal T2, the voice output from the voice input / output terminal T2 is applied to the speaker 24b (see FIG. 3), and the voice input to the voice input / output terminal T2 is a microphone. Input from 24a (see Figure 3).

【0018】

Further, a channel codec circuit 13 that performs data codec processing is connected to the RF circuit 11. The channel codec circuit 13 performs data compression / decompression processing and scramble / descramble processing. For example, when the received signal is data, the data supplied from the RF circuit 11 to the channel codec circuit 13 After performing descramble processing and decompression processing, the reproduced data is output via the external interface circuit 14. Further, the data input to the channel codec circuit 13 via the external interface circuit 14 is subjected to compression processing and scrambling processing, output via the RF circuit 11, and transmitted from the antenna A.

【0019】

The external interface circuit 14 is an interface for exchanging data with an external device and is connected to the input / output terminal T3. The external interface circuit 14 is an interface standard for PC cards established by PCMCIA (Personal Computer Memory Card International Association), and RS is used in personal computers, mobile information terminals, and peripheral devices established by EIA (American Electronics Industry Association). It is a serial interface standard called -232C. A network controller 20 described later in the in-vehicle LAN (Local Area Network) is connected to the input / output terminal T3, and a vehicle control system 30 that electronically controls the vehicle is connected to the network controller 20. This in-vehicle LAN is constructed of, for example, Ethernet (registered trademark) which is a CSMA / CD (Carrier Sense Multiple Access with Collision Detection) type LAN (IEEE802.3).

【0020】

The central processing unit (CPU) 15 is a system control unit that controls the operation of each part of the communication module 10 by executing a telephone function program, and indicates the elapsed time during operation or at a specific time interval. It is equipped with a timer that generates a timer interrupt. Further, the CPU 15 performs a process of detecting the running state of the vehicle from the speed information or the parking information of the vehicle received from the vehicle control system via the external interface circuit 14. The ROM 16 is a ROM (Read Only Memory) in which various telephone function programs for transmission processing and reception processing executed by the CPU 15 and programs such as automatic transmission processing for automatically transmitting to a set destination are stored.

【0021】

RAM17 is a RAM (Random) in which the telephone number of the other party to be automatically sent, the location information of the imported device, the storage area of the vehicle condition information, the user setting data storage area, the work area of the CPU15, etc. are set. Access Memory). Each functional block exchanges data and commands via the bus 18. The communication module 10 configured in this way is incorporated and installed in the dash boat of the vehicle or in another device such as an audio device so as not to be seen from the inside of the vehicle.

【0022】

FIG. 3 shows a configuration example of a communication device composed of the communication module 10 incorporated in the vehicle and the device of the vehicle. The communication module 10 having the configuration shown in FIG. 2 is connected to the network controller 20. In this case, the input / output terminal T3 of the communication module 10 and the network controller 20 are connected. This network controller 20 is an Ethernet network controller, and its data transmission speed is said to be 10 Mbps. The vehicle control system 30 is connected to the network controller 20 via a LAN cable. The data transmission speed is not limited to 10 Mbps, but may be 100 Mbps or higher.

【0023】

In addition, the network controller 20 causes the display 21 that displays the display information received by the communication module 10 and the communication module 10 to transmit or reproduce the stored voice data (voice information and received signal). Switches 22 that can operate and GPS (Global Positioning Systems) antenna 23 that receives GPS signals from GPS satellites are connected. Further, a hands-free unit 24 for transmitting and receiving without holding the communication module 10 in the hand is connected to the communication module 10. The hands-free unit 24 is provided with a microphone 24a for inputting a transmitted voice from the user and a speaker 24b for transmitting the received voice to the user. The communication module 10 is connected to a built-in battery B capable of operating the communication module 10 independently when power is not supplied from the battery loaded in the vehicle.

【0024】

The vehicle control system 30 includes a vehicle control unit 31 equipped with a CPU, various sensors 32 for obtaining condition information of each part of the vehicle, and switches 33 for turning on / off various lights / lamps and wipers of the vehicle. It is composed of a display 34 provided on an instrument panel or the like that displays the vehicle speed, mileage, remaining amount of fuel, etc., and a motor 35 such as a solenoid for shift lock or a wiper. As a result, the communication module 10 can obtain vehicle condition information from the vehicle control system 30 via the network controller 20.

【0025】

As a result, for example, by operating the price assessment transmission switch (not shown) among the switches 22 connected to the in-vehicle communication module 10, the in-vehicle communication module 10 to the base station 42, the mobile communication network 40, and the Internet. A request for assessing the used car price is sent to the web server 51 via 50. In response to this, the web server 51 searches the trade-in price of the vehicle 10A, which is the mobile terminal, from the vehicle price database 52 of the used car, and the search result is in-vehicle communication via the Internet 50, the mobile communication network 40, and the base station 42. Module 10 will be notified.

【0026】

Here, the mobile communication network 40 is a mobile communication network corresponding to a core network composed of a plurality of exchanges and the like, and an HLR (Home Lacation Register) 41 is provided. The HLR 41 stores an in-network database that manages location information and subscriber data of all mobile terminals in the mobile communication network 40. Then, the communication module 10 incorporated in the vehicle 10A can operate as a communication terminal in the existing mobile communication network 40. The mobile communication network 40 has a large number of cells, and one cell is provided with a base station (BS) 42.

【0027】

The base station 42 controls the communication of the mobile terminal (vehicle-mounted communication module) 10 located in this cell. For example, the base station 42 in this cell controls the communication of the mobile terminal 10. In the following description, it is assumed that the communication module 10 is incorporated in the vehicle 10A to be the mobile terminal, and the communication module 10 is a mobile phone. The mobile communication network 40 can be connected to the Internet 50 via a gateway.

【0028】

The mobile terminal (vehicle-mounted communication module) 10 collates the cell number of the cell in which the own device is located stored in the own device with the notified cell number, and when they do not match, the mobile terminal (in-vehicle communication module) 10 10 sends a location registration signal in the network. Upon receiving this, the base station 42 of the cell sends a location registration signal to the mobile communication control station. The mobile communication control station converts the location registration signal into routineable location information and stores it in the HLR 41. That is, the cell number of one cell is stored in the position information column stored in the mobile terminal 10 belonging to one cell and the HLR 41 in the other mobile terminal. Here, when the mobile terminal 10 moves from one cell to another cell, the mobile terminal 10 is relocated to another cell.

【0029】

On the other hand, the web server 51 can be connected to the Internet 50, and has a used car price database 52 and a used car database 53. The used car price database 52 is pre-calculated based on vehicle information such as manufacturer name, vehicle type, model, displacement, paint color, fuel, mileage, and remaining vehicle inspection, and is calculated in advance for a predetermined time. It is a database that is automatically updated every time, and stores used car price information. In addition, the used car database 53 stores vehicle inspection information such as owner / user, vehicle type / model, registration date, color / fuel, mileage information, and maintenance information, and is registered by the user. It is a database that is updated sequentially every time.

【0030】

The client 54 is composed of a personal computer owned by a user who wishes to purchase a used car, and the personal computer 54 can be connected to the Internet 50. Here, a user who wishes to purchase a used car connects the client computer 54 to the Internet 50, accesses the web server 51, searches the used car database 53, finds the desired used car, and wishes to purchase it. When the request is made, the web server 51 notifies the in-vehicle communication module 10 of the used car 10A that matches the purchase inquiry via the Internet 50, the mobile communication network 40, and the base station 42 of the purchase inquiry information.

【0031】

As a result, the user of the vehicle-mounted communication module 10 (the owner of the vehicle 10A) can confirm the notification of the purchase request from the web server 51 on the display 21 connected to the vehicle-mounted communication module 10. Then, when the application switch for buying and selling among the switches 22 connected to the in-vehicle communication module 10 is operated, the web server 51 remotely diagnoses the in-vehicle communication module 10 via the Internet 50, the mobile communication network 40, and the base station 42. Will be notified. Based on this remote diagnosis notification, the in-vehicle communication module 10 acquires vehicle condition information from the vehicle control system 30 via the network controller 20, and obtains the acquired diagnosis results from the base station 42, the mobile communication network 40, and the Internet 50. It is sent to the web server 51 via.

【0032】

2. Price assessment operation and sales brokerage operation Next, the operation of the price valuation system and the sales brokerage system described above will be described with reference to the flowcharts shown in FIGS. 4 to 6. Note that FIG. 4 is a flowchart showing the processing operation of the price assessment of the used car, and FIG. 5 is a flowchart showing the processing operation of the used car registration. Further, FIG. 6 is a flowchart showing the processing operation of the used car sales brokerage system.

【0033】

(1) Price assessment operation First, the operation of price assessment will be described based on the flowchart of FIG. The owner of the vehicle equipped with the in-vehicle communication module 10 operates the price assessment switch among the switches connected to the in-vehicle communication module 10 (S100), thereby causing the in-vehicle communication module 10 to the base station 42 and mobile communication. A request for assessment of the used car price is sent to the web server 51 via the network 40 and the Internet 50. Here, the RAM 17 (see FIG. 2) of the in-vehicle communication module 10 is sequentially connected to the vehicle owner / user, vehicle type / model, registration date, vehicle inspection information such as color / fuel, and external interface 14 via the external interface 14. The acquired mileage information and maintenance information are stored. Therefore, when requesting a used car price assessment, this information will also be sent (S102).

【0034】

Then, after receiving the request for used car price assessment (S104), the web server 51 searches the trade-in price of the vehicle 10A equipped with this in-vehicle communication module 10 from the used car price database 52 (S106), and finds the most. Send matching search results (vehicle trade-in price) (S108). Then, the web server 51 notifies the in-vehicle communication module 10 of this result via the Internet 50, the mobile communication network 40, and the base station 42. As a result, the assessed price is displayed on the display 21 connected to the vehicle-mounted communication module 10 (S110).

【0035】

As a result, the appraisal price of the vehicle used by the user can be calculated in real time via the communication module 10 mounted on the vehicle, and the model, year, and registration year of the vehicle owned by the user can be obtained. It will be possible to automatically assess the price without entering the date, next vehicle inspection date, mileage, etc. In this case, the vehicle price database 52 of the used car stores the price list for each vehicle type in advance, but this price list is sequentially updated based on a predetermined calculation formula every time a predetermined time elapses. It is done like this.

【0036】

(2) Operation of used car information registration Next, the operation of the used car information registration will be described based on the flowchart of FIG. The user who owns this vehicle is satisfied with the assessed price displayed on the display 21 connected to the in-vehicle communication module 10, and operates the vehicle information registration switch among the switches 22 connected to the in-vehicle communication module 10 ( S200) Then, a request for vehicle information registration is transmitted from the in-vehicle communication module 10 to the web server 51 via the base station 42, the mobile communication network 40, and the Internet 50. As a result, the web server 51 can use the vehicle inspection information (owner / user, vehicle type / model, registration date, color / fuel, etc.), mileage information, maintenance information, etc. of the vehicle transmitted from the in-vehicle communication module 10. The used car information is received (S204), and the received information is stored in the used car database 62 (S206).

【0037】

(3) Operation of sales brokerage Next, the operation of sales brokerage will be described based on the flowchart of FIG. Here, it is assumed that the client 54 connected to the Internet accesses the web server 51 and searches for a used car. At this time, on the search screen displayed on the monitor screen of the client 54, the user of the client 54 inputs the vehicle information such as the desired vehicle type / model, registration date, color / fuel, and the client 54 requests this. Vehicle information will be transmitted (S300). As a result, when the web server 51 receives the vehicle information (S302), the optimum vehicle information such as the vehicle type / model, registration date, color / fuel, etc. is searched from the used car database 53 (S304). When this search result is sent to the client 308 (S306), the client 54 receives the search result (S308) and displays the search result on the monitor screen of the client 54, such as the vehicle type / model, registration date, color / fuel, etc. Vehicle information will be displayed.

【0038】

At this time, if the purchase request of this vehicle is transmitted to the web server 51 (S310) based on the vehicle information searched by the user of the client 54, the web server 51 receives the signal of the purchase request (S312). .. Based on the reception of this purchase request signal, the web server 51 transmits a signal (S314) to the in-vehicle communication module 10 via the Internet 50, the mobile communication network 40, and the base station 42 to the effect that there is a purchase requester. Become. As a result, the in-vehicle communication module 10 receives a signal (S316) indicating that there is a purchase applicant. As a result, the display 21 connected to the in-vehicle communication module 10 indicates that there is a purchase applicant, and the owner of the vehicle 10A equipped with the in-vehicle communication module 10 is notified that there is a purchase applicant. It becomes.

【0039】

Here, when the owner of the vehicle 10A equipped with the in-vehicle communication module 10 operates the switch for the purchase / sale application among the switches 22 connected to the in-vehicle communication module 10, a signal indicating that the application for sale / purchase is made is sent to the base station. 42, it will be transmitted (S318) to the web server 51 via the mobile communication network 40 and the Internet 50. As a result, the web server 51 receives a signal (S320) indicating that it is an application for buying and selling. Then, the web server 51 transmits a diagnostic signal (S322) for diagnosing the current state of the vehicle to the in-vehicle communication module 10 via the Internet 50, the mobile communication network 40, and the base station 42.

【0040】

When the communication module 10 receives the diagnostic signal (S324), the communication module 10 receives the current condition information of the vehicle from the vehicle control system 30 via the network controller 20 (current mileage, maintenance information, etc., not at the time of registration). To get. Then, the communication module 10 transmits the diagnosis result to the web server 51 (S326) via the base station 42, the mobile communication network 40, and the Internet 50. Then, after receiving the diagnosis result (S328), the web server 51 transmits the diagnosis result to the client 54 who is the user who wants to purchase the vehicle. As a result, the diagnosis result of the client 54 is received (S330), and the diagnosis result is displayed on the monitor screen of the client 54. As a result, the user of the client 54 who wishes to purchase the vehicle can obtain the current condition information of the vehicle desired to purchase.

【0041】

[Effect of the invention]

As described above, in the used car price valuation system of the present invention, it is possible to perform the valuation price of the vehicle used by the user in real time via the communication module 10 mounted on the vehicle. , A used car price valuation system that can automatically valuate the price without entering the model, year, registration date, next vehicle inspection date, mileage, etc. of the vehicle owned by the user It will be possible to provide.

【0042】

Further, in the used car sales brokerage system of the present invention, a user who wishes to purchase a used car connects a personal computer 54 as a client to the Internet 50, accesses a web server 51, and searches a used car database 53. .. As a result, when the desired used car is found and the purchase request is requested, the web server 51 sends the purchase inquiry information to the used car 10A that matches the purchase inquiry via the Internet 50, the mobile communication network 40, and the base station 42. The in-vehicle communication module 10 is notified.

【0043】

As a result, the user of the vehicle-mounted communication module 10 (the owner of the vehicle 10A) can confirm the notification of the purchase request from the web server 51 on the display 21 connected to the vehicle-mounted communication module 10. Then, when the purchase / sale application switch connected to the in-vehicle communication module 10 is operated, the web server 51 will notify the in-vehicle communication module 10 of the remote diagnosis via the Internet 50, the mobile communication network 40, and the base station 42. ..

【0044】

Based on this remote diagnosis notification, the in-vehicle communication module 10 acquires vehicle condition information from the vehicle control system 30 via the network controller 20, and obtains the acquired diagnosis results from the base station 42, the mobile communication network 40, and the Internet 50. It is sent to the web server 51 via. As a result, the diagnosis result of the client 54 is received, and the diagnosis result is displayed on the monitor screen of the client 54. As a result, the user who is the client who requested the purchase of the used vehicle can know the current mileage information, maintenance information, and vehicle inspection information of the vehicle in real time. This makes it possible to provide a sales brokerage system that allows a broker to broker the sale and purchase of a used car in real time without owning the used car.

[Simple explanation of drawings]

[Figure 1]

It is a figure which shows typically the structure of the used car price valuation system and the buying and selling intermediary system of this invention.

[Figure 2]

It is a functional block diagram which shows the structure of the communication module of this invention.

[Fig. 3]

It is a figure which shows the configuration example of the communication device which consists of the communication module of FIG. 2 and the device of a vehicle.

[Fig. 4]

It is a flowchart which shows the processing operation of the price assessment of a used car.

[Fig. 5]

It is a flowchart which shows the process operation of used car registration.

[Fig. 6]

It is a flowchart which shows the processing operation of the buying and selling brokerage of a used car.

[Explanation of symbols]

10 ... in-vehicle communication module, 10A ... vehicle, 11 ... circuit, 12 ... voice codec circuit, 13 ... channel codec circuit, 14 ... external interface circuit, 18 ... bus, 20 ... network controller, 21 ... display, 22 ... switches, 23 ... antenna, 24 ... hands-free section, 24a ... microphone, 24b ... speaker, 30 .. Vehicle control system, 31 ... vehicle control unit, 32 ... various sensors, 33 ... switches, 34 ... display, 35 ... motor, 40 ... mobile communication network, 42. .. Base Station (BS), 50 ... Internet, 51 ... Web Server, 52 ... Vehicle Price Database, 53 ... Used Car Database, 54 ... Client