CN101661634B - Roadside unit and server - Google Patents

Abstract

The invention relates to a wireless communication system, vehicle unit, roadside unit and server. A wireless communication system (10, 15, 17) provides a decryption module (35, 36, 37) for decrypting card information on a roadside unit (30, 50) for information registration and a roadside unit (40, 60) for toll collection instead of providing the decryption module on a vehicle unit. In this manner, the wireless communication system can accommodate an IC card that uses a new encryption method more easily relative to a conventional wireless communication system, because the roadside units (30, 40, 50, 60) are smaller in number in comparison to the vehicle units (20, 120) at the time of system operation with greater allowance for demand for space efficiency and cost reduction.

Description

Roadside Units and Servers

This application is filed on September 4, 2007, the application number is 200710148273.0, the earliest priority is on September 5, 2006, and the invention name is "wireless communication system, vehicle unit, roadside unit and server". Divisional application. the

technical field

The present disclosure relates generally to wireless communication systems and devices for wireless charging. the

Background technique

An ETC system (Electronic Toll Collection System) is known as a wireless communication system that performs collection such as toll collection by radio. Such a TEC system is a system that automatically performs toll payment by applying wireless communication between a roadside unit located at a toll gate and a vehicle unit on a vehicle, thereby allowing a vehicle to pass through a toll gate without stopping. the

As for the ETC system, the vehicle unit of the system is currently being used for payment of parking fees at fast food restaurants, amusement parks, etc., and wide variety of implementations is expected. the

FIG. 17A is a block diagram showing a configuration example of an in-vehicle unit in a conventional ETC system. As shown in the figure, the in-vehicle unit 160 is equipped with a DSRC unit 162, an HMI 163, an ETC-SAM 164, and an integrated circuit (IC) card interface 165 and a control unit 166 with a wireless antenna 161. In this context, "SAM" generally denotes a secure application module of the art. the

The wireless antenna 161 is an antenna for dedicated short-range communication. The DSRC unit 162 performs transmission and reception of information by the DSRC through the wireless antenna 161 . the

The HMI 163 is a unit that provides an interface (ie, a human-machine interface) for communication between humans and devices. More specifically, the HMI 163 is composed of operation buttons, LEDs, and the like. the

The ETC-SAM 164 is equipped with a vehicle unit v-SAM 164a for an in-vehicle device and a card v-ASAM 164b for an IC card. The vehicle unit v-SAM 164a for in-vehicle devices performs encryption/decryption (for example, encryption/decryption) of information communication with roadside devices and encryption/decryption of vehicle device information (management number, form registration number, vehicle number, etc.) decrypt. On the other hand, the v-SAM 164b for IC cards performs encryption/decryption of card information (card number, expiration date, name information, card issuer number, card type, amount of money, usage history information, etc.). the

The IC card interface 165 is an interface for performing communication with the IC card 167 and is used to read out stored information of the IC card 167 . In this case, the IC card interface 165 is controlled by the v-SAM 164b. the

The control unit 166 includes a central processing unit, ROM, RAM, I/O, etc., and controls the DSRC unit 162, the HMI 163, and the ETC-SAM 164 in a unified manner. the

Fig. 17B is a block diagram showing a configuration example of a road surface unit in a conventional ETC system. The roadside unit 180 is equipped with a DSRC unit 182, a road SAM 183, a communication interface (I/F) 184, and a control section 185 having a wireless antenna 181 as shown in the figure. the

The wireless antenna 181 is an antenna for DSRC. The DSRC unit 182 performs transmission and reception of information by the DSRC through the wireless antenna 181 . the

The road SAM 183 is a unit that has a function of decrypting encrypted information sent from the in-vehicle unit 160 and a function of encrypting information to be sent to the in-vehicle unit 160. the

The communication interface 184 is a wired interface for communicating with the information center or toll booth computer. In this case, the information center is a computer having the function of managing the entire ETC system, and the toll booth computer is a computer having the function of performing the charging process. the

The control unit 185 includes a central processing unit (CPU), ROM, RAM, I/O, etc., and controls the DSRC unit 182, the road SAM 183, and the communication interface 184 in a unified manner. the

18 is a sequence diagram showing an example of the data processing sequence among the in-vehicle device 160 (control unit 166, ETC-SAM 164), roadside unit 180, and IC card in the conventional ETC system. the

When the IC card 167 is mounted to the in-vehicle device 160, the control unit 166 sends a card information reading request to the ETC-SAM 164 (S905). Once the card information reading request is received at the ETC-SAM 164, the card v-SAM 164b sends a card information retrieval request to the IC card through the IC card interface 165 (S906), and retrieves encrypted card information from the IC card (S910). Then, the card v-SAM 164b decrypts the encrypted card information to pass it to the control unit 166 (S915). the

The control unit 166 stores the decrypted card information upon receiving the information, and performs communication with the roadside apparatus 180 as long as the IC card is installed in the vehicle unit 160 . the

Then, when the encrypted information is transferred from the roadside unit 180 to the vehicle unit 160 (S620), the control unit 166 within the vehicle unit 160 transfers the information to the ETC-SAM 164 for decryption (S925). the

When the ETC-SAM 164 receives the encrypted information, the ETC-SAM 164 decrypts the information with the vehicle unit v-SAM 164a, and passes it to the control unit 166 (S930). Then, the control unit 166 receives the decrypted information, and executes a predetermined process using the received information. the

In addition, when the control unit 166 in the in-vehicle unit 160 is required to transmit the card information etc. in storage to the roadside equipment 180 after encryption, the control unit 166 passes the information to the ETC-SAM 164 for encryption (S935). the

Once the ETC-SAM 164 receives the information, it encrypts the received information with the vehicle unit v-SAM 164a, and passes it to the control unit 166 (S940). the

Once the control section 166 receives the information, it transfers the encrypted information to the roadside unit 180 (S945). Japanese Patent Laid-Open JP-A-2004-62468 discloses the encryption/decryption scheme described above (this document is also disclosed as US Patent Document US692037). the

As described above, in the conventional ETC system, the encrypted card information retrieved from the IC card is used after decryption is performed using the card v-SAM 164b in the ETC-SAM 164. In other words, the card v-SAM 164b is indispensable for the in-vehicle unit 160. the

Therefore, in handling an application different from the ETC system, when the application communicates with the IC card using a different encryption method, the in-vehicle unit needs to have a different module equivalent to the v-SAM 164b of the vehicle. the

The above situation becomes a problem when implementing various applications in the ETC system. In other words, if different modules are added to the in-vehicle unit after it is sold in the market, the in-vehicle unit increases its volume and complicates its structure, and increases the difficulty of adding applications. the

In addition, because the IC card needs to be inserted into the in-vehicle unit when the in-vehicle unit communicates with the roadside unit, after pulling out the IC card, for example, in a service area on an expressway, if a toll is charged at the exit of the expressway, the user must re-attach the toll. Insert the IC card into the in-vehicle unit. the

Contents of the invention

In view of the foregoing and other issues, the present disclosure provides a wireless communication system that facilitates both the user of the vehicle unit and the system administrator. the

The wireless communication system in the present disclosure includes a vehicle-side controller that transmits encrypted information retrieved from an external storage medium through an interface unit to a first roadside unit through a vehicle-side wireless communication unit, and by using the first roadside unit After the security unit in the first roadside unit decrypts the encrypted information and verifies the authenticity of the content of the encrypted information, the controller in the first roadside unit will pass the wireless communication unit in the first roadside unit received from the vehicle unit This encrypted information is sent back to the vehicle unit via the wireless communication unit in the first roadside unit. the

Then, the controller in the vehicle unit stores this encrypted information received from the first roadside unit through the vehicle-side wireless communication unit in the memory unit, and then stores it in the external storage once there is a pair from the second roadside unit In response to the transmission request of the encrypted information in the unit, the controller in the vehicle unit transmits the encrypted information stored in the storage unit through the vehicle-side wireless communication unit to the second roadside unit. The controller in the second roadside unit then processes this encrypted information received by requesting it from the vehicle unit to be used by the intended application after decrypting it using the security unit in the second roadside unit. In this case, the application means an application system or the like for toll collection or the like, such as a toll collection system on an expressway (for example, what is called an ETC system in Japan), a parking fee collection system in a toll parking lot, or the like. the

When the vehicle unit communicates with the roadside unit, the wireless communication system described above does not have to be in a communicable state with the external storage unit. Therefore, for example, when the user uses the toll collection system of the toll booth at the exit of the toll road, the user does not need to reinsert the IC card into the IC card slot before passing the toll booth after pulling out the IC card from the IC card slot in the service area or the like. Therefore, in the above case, the user's operation of inserting the IC card into the slot is omitted. the

Description of drawings

Other objects, features and advantages of the present invention will be clearer from the following detailed description in conjunction with the accompanying drawings, wherein:

Fig. 1 shows the block diagram of the wireless communication system in the first embodiment of the present disclosure;

Fig. 2 shows the block diagram of the vehicle unit in the first embodiment of the present disclosure;

3A and 3B show a block diagram of a registration unit and a charging unit in a first embodiment of the present disclosure;

Figure 4 shows a sequence diagram of the process of registering card information to the vehicle unit in the first embodiment of the present disclosure;

Fig. 5 shows the sequence diagram of the charging process in the first embodiment of the present disclosure;

Fig. 6 shows the sequence diagram of the historical storage process on the IC card in the first embodiment of the present disclosure;

Fig. 7 shows the block diagram of the wireless communication system in the second embodiment of the present disclosure;

8A and 8B show a block diagram of a registration unit and a charging unit in a second embodiment of the present disclosure;

Figure 9 shows a sequence diagram of the process of registering card information to the vehicle unit in the first embodiment of the present disclosure;

Fig. 10 shows the sequence diagram of the charging process in the second embodiment of the present disclosure;

Fig. 11 shows the block diagram of the wireless communication system in the 3rd embodiment of the present disclosure;

12A and 12B show a block diagram of a vehicle unit and a cellular phone in a third embodiment of the present disclosure;

Fig. 13 shows the block diagram of the card center server in the third embodiment of the present disclosure;

14 shows a sequence diagram of the card ID registration process of the vehicle unit in the third embodiment of the present disclosure;

15 shows a flow chart of the card ID registration process in the vehicle unit in the third embodiment of the present disclosure;

Fig. 16 shows the flowchart of the card ID registration process in the card center server in the third embodiment of the present disclosure;

17A and 17B show a block diagram of a vehicle unit and a roadside unit in a conventional system; and

Fig. 18 shows a sequence diagram of the encryption/decryption process in the conventional system. the

Detailed ways

Embodiments of the present disclosure have been described with reference to the drawings. In this case, the present disclosure of the invention is not limited to the following embodiments, but they may take various forms as long as they pertain to the technology of the invention. the

[First embodiment]

[Composition Description] 

FIG. 1 is a block diagram showing the configuration of a wireless communication system 10 in the first embodiment. The wireless communication system 10 is equipped with a vehicle unit 20 carried by a vehicle, a registration unit 30 placed on the roadside, parking area, gas station, etc. unit 40 and information center 70. In addition, FIG. 1 only shows one vehicle unit 20 , registration unit 30 and charging unit 40 in the accompanying drawings, but multiple units can be used in an actual system. In addition, the registration unit 30 may be placed at the entrance of a toll road or the like, and a distinguishing label may be affixed thereon so that the user can clearly distinguish it from the toll unit 40 . the

Next, details of the vehicle unit 20 are explained by using the block diagram in FIG. 2 . The vehicle unit 20 is equipped with a wireless antenna 21, a DSRC unit 22, an HMI 23, a vehicle unit v-SAM 24, an integrated circuit (IC) card interface (I/F) 25, a memory 26, and a control unit 27. the

The wireless antenna 21 is used for dedicated short range communication (DSRC) providing wireless communication for narrow area communication. the

The DSRC unit 22 performs transmission and reception of information by the DSRC through a wireless antenna. the

The HMI 23 is an interface unit that provides a human-machine interface for communication between humans and equipment. More specifically, the interface includes operation buttons and/or LEDs. the

The vehicle unit v-SAM 24 performs encryption and decryption of information exchanged with the registration unit 30 and the charging unit 40 and encryption/decryption of vehicle unit information (i.e. management number, form registration number, vehicle number, etc.). the

The IC card interface 25 is an interface for communicating with the IC cards 28a, 28b, 28c, and retrieves information stored in the IC cards 28a, 28b, 28c and stores information in these IC cards 28a, 28b, 28c. In this case, the IC card interface 25 is assumed to be a non-contact type interface in this embodiment, but it may also be configured as a contact type interface. In this case, the IC cards 28a, 28b, 28c store information using different encryption methods, respectively. the

The memory 26 includes a device (for example, a flash memory) that stores various information without requiring a memory content holding operation. the

The control unit 27 includes a central processing unit (CPU), ROM, RAM, I/O, etc., and controls the DSRC unit 22, HMI 23, vehicle unit v-SAM 24, IC card interface 25, and memory 26 in a unified manner. the

Details of the registration unit 30 are explained below using the block diagram in FIG. 3A. The registration unit 30 is equipped with a wireless antenna 31 , a DSRC unit 32 , a road SAM 33 , a communication interface 34 , card SAMs 35 , 36 , 37 and a control unit 38 . the

The wireless antenna 31 is an antenna for DSRC. The DSRC unit 32 performs transmission and reception of information by DSRC using a wireless antenna. the

The road SAM 33 is a unit having a function of encrypting information (excluding card information) to be transmitted to the vehicle unit 20 and a function of decrypting encrypted information (excluding card information) received from the vehicle unit 20 . the

The communication interface 34 is an interface for communicating with the information center 70 through wired communication. the

The cards SAMs 35, 36, 37 are used to encrypt and decrypt information by an encryption method applied to information stored in the IC cards 28a, 28b, 28c corresponding to the cards SAMs 35, 36, 37, respectively. the

The control unit 38 is a unit including a central processing unit (CPU), ROM, RAM, I/O, etc., and controls the DSRC unit 32, road SAM 33, communication interface 34, and card SAMs 35, 36, 37 in a unified manner. the

Details of the charging unit 40 are explained below using the block diagram in FIG. 3B. The charging unit 40 is equipped with a road SAM 43, a communication interface 44, card SAMs 45, 46, 47, a control unit 48, a wireless antenna 41 and a DSRC unit 42. the

The wireless antenna 41 is an antenna for DSRC. The DSRC unit 42 performs transmission and reception of information by DSRC using the wireless antenna 41 . the

The road SAM 43 is a unit having a function of encrypting information (excluding card information) to be transmitted to the vehicle unit 20 and a function of decrypting encrypted information (excluding card information) received from the vehicle unit 20. the

The communication interface 44 is an interface for communicating with the information center 70 through wired communication. the

The card SAMs 45, 46, 47 are used to encrypt and decrypt information by an encryption method applied to information stored in the IC cards 28a, 28b, 28c corresponding to the card SAMs 35, 36, 37, respectively. In this case, the charging unit 40 in this embodiment has three cards SAM (which means that the charging unit 40 is suitable for at least three different applications), but there may be only one card SAM. the

The control unit 48 is a unit including a central processing unit (CPU), ROM, RAM, I/O, etc., and controls the DSRC unit 32, the road SAM 33, the communication interface 34, and the card SAMs 35, 36, 37 in a unified manner. the

The information center 70 is explained below. The information center 70 includes a well-known server device, and has a function of storing registration information sent from the registration unit 30 and a function of performing a payment process based on payment information sent from the charging unit 40 . the

[Instructions]

The operation of the wireless communication system 10 is explained below. the

(1) Card information registration process

First, the card information registration process regarding the information to be registered in the vehicle unit 20 stored in the IC card (one of the IC cards 28a, 28b, 28c) is described with reference to the sequence diagram in FIG. In this case, well-known parts of the DSRC protocol are omitted from the description for simplicity and brevity. the

When the vehicle unit 20 receives the BST (Beacon Service Table) from the registration unit 30 after entering the communication area of the registration unit 30 (S105), the vehicle unit 20 sends a response requesting an IC card ("selection card" in the figure) ( S110). In this case, it is assumed that the IC card interface of the vehicle unit 20 cannot communicate with the IC card (that is, it is assumed that the IC card is not near the IC card interface 25). the

If there is no response from the IC card by a predetermined time, the vehicle unit 20 transmits a VST (Vehicle Service Table) to the registration unit 30 to notify the registration unit 30 that there is no IC card (S115). the

When the vehicle unit 20 receives the BST again from the registration unit 30 after a predetermined interval (S120), the vehicle unit 20 transmits a response requesting the IC card (S130). If the IC card can communicate with the IC card interface 25 (if the IC card is near the IC card interface 25), a response (ATR in the figure) is sent from the IC card to the vehicle unit 20 (S135). Then, the vehicle unit 20 transmits a VST to the registration unit 30 to notify the registration unit 30 of the presence of the IC card (S140). the

Then, mutual authentication (S150) is performed between the control unit 38 of the registration unit 30 and the vehicle unit 20, and in the card SAM (card SAM 35, 36, 37 of the registration unit 30) corresponding to the encryption method for the current IC card Mutual authentication is performed between the corresponding card (SAM) and the IC card (S155). the

If the mutual authentication is normal, the control unit 38 of the registration unit 30 transmits a card information reading instruction to the vehicle unit 20 (S160), and the vehicle unit 20 receiving this instruction uses the IC card interface 25 to read the encrypted card from the IC card Information (S165). In this case, "card information" means card number, expiration date, name information, card issuer number, card type, amount, usage history information, and the like. the

The vehicle unit 20 that has read the encrypted card information transmits the encrypted card information to the control unit 38 of the registration unit 30 (S170). the

The control unit 38 of the registration unit 30 having received the encrypted card information transfers the card information to a card SAM corresponding to the card information (ie, the card SAM capable of decrypting the card information) (S175). The card SAM receiving the encrypted card information decrypts the encrypted card information, and transfers the decrypted information to the control unit 38 (S180). the

The control unit 38 having received the decrypted card information checks the card information (S185). More specifically, the control unit 38 checks whether the decryption is normal, whether the decrypted card information contains no difference, and the like. In this case, the information may be retrieved from the information center 70 via the communication interface 34 for verification of the card information, or the card information may be transmitted to the information center 70 for verification at the information center 70 . the

If it is determined that the card information is normal, the registration unit 30 transmits the encrypted card information before decryption to the vehicle unit 20 (S190). In this case, the reason for transmitting the encrypted card information to the vehicle unit 20 is to prevent replacement of the card information or the like during authentication and to store the encrypted card information verified as normal in the vehicle unit 20 . the

The vehicle unit 20 that has received the encrypted card information stores the received information in the memory 26 (S195). Thereafter, as long as the charging unit 40 requests to transmit encrypted card information, it is not necessary to determine that communication with the IC card is feasible, and the vehicle unit 20 transmits the card information stored in the memory 26 to the charging unit 40 instead of retrieving the card from the IC card information. the

(2) Charge process

The process of charging through communication between the vehicle unit 20 and the charging unit 40 will be described below with reference to the sequence diagram in FIG. 5 . In this case, well-known parts of the DSRC protocol are omitted from the description for simplicity and brevity. the

When the vehicle unit 20 receives the BST (beacon service table) from the charging unit 40 after entering the communication area (S205), the vehicle unit 20 determines whether the IC card information of the application corresponding to the charging unit 40 is stored in the memory 26, and if The IC card information is stored in the charging unit 40 and VST (Vehicle Service Table) is transmitted to notify the charging unit 40 that the IC card information is stored (S210). the

Then, mutual authentication is performed between the control unit 48 of the charging unit 40 and the vehicle unit 20 (S215). the

If the mutual authentication is normal, a card information reading instruction is transmitted from the control unit 49 of the charging unit 40 to the vehicle unit 20 (S225). Then, the control unit 27 of the vehicle unit 20 then reads the encrypted card information stored in the memory 26 and corresponding to the specified application (S230). Then, the encrypted card information that has been read is sent to the charging unit 40 (S235). the

The control unit 48 of the charging unit 40 receiving the encrypted card information transfers the card information to a card SAM (SAM capable of decrypting the card information) corresponding to the card information (S240). The card SAM having received the encrypted card information, after decrypting the encrypted card information, transmits the decrypted information to the control unit 48 (S245). the

The control unit 48 having received the decrypted card information executes the charging process (S250). More specifically, the control unit 48 performs a payment process by transmitting card information via the communication interface 44 , or performs a process of reducing the amount of money in the card information stored in the memory 26 of the vehicle unit 20 . the

(3) Historical information writing process

A process of storing usage history information to the memory 26 of the vehicle unit 20 through communication between the vehicle unit 20 and the registration unit 30 is described with reference to the sequence diagram in FIG. 6 . In this case, well-known parts of the DSRC protocol are omitted from the description for simplicity and brevity. In addition, the initial process performed when the vehicle unit 20 enters the communication area of the registration unit 30 (equivalent to steps S105 to S155 in FIG. 4 ) is omitted from the description due to its similarity. the

When the initial process is completed, the vehicle unit 20 retrieves the history information of the specific service from the memory 26 based on the input from the HMI 23 (S305). the

Then, the vehicle unit 20 transmits the history information that has been read from the memory 26 to the registration unit 30 (S310). the

The control unit 38 of the registration unit 30 that has received this history information is delivered to the card SAM (the corresponding card SAM in the card SAM 35,36,37 for the encryption method of the IC card relevant to the above service) (S315) ). the

The card SAM having received the history information transfers the encrypted history information to the control unit 38 (S320). the

The control unit 38 of the registration unit 30 having received the encrypted history information transmits the history information to the vehicle unit 20 (S325). the

The vehicle unit 20 that has received the encrypted history information writes the history information to the IC card through the IC card interface 25 (S330, S335). When the vehicle unit 20 receives the end status indicating that the writing is completed from the IC card (S340), the end status indicating that the writing is completed is sent from the vehicle unit 20 to the registration unit 30 (S345). the

[Effect of this embodiment]

Because the communicable condition with the IC card is not required when communicating between the vehicle unit 20 and the charging unit 40, the user of the communication system 10 can avoid pulling out the IC card or the like from the vehicle unit 20 in the service area before passing through the toll booth. The trouble of inserting it into the IC card after going out. the

In addition, a decryption module for decrypting encrypted card information is stored in the registration unit 30 and the charging unit 40, thereby enabling the communication system 10 to provide a new encryption method in an easier manner. (This is because the number of roadside units [registration units and toll units] is smaller than the number of vehicle units in a working communication system)

In addition, after encryption, the information in the IC card is transmitted to the IC card (refer to FIG. 6), thereby enabling reduction in the number of modules used in the communication system to obtain the same result. the

[Second embodiment]

Although the registration unit 30 in the first embodiment sends the card information before decryption to the vehicle unit 20 after checking the card information by decryption when receiving the card information from the vehicle unit 20 (S190), but for The verified card information can be sent to the vehicle unit after being encrypted by the road SAM 33. In other words, the vehicle unit 20 can store card information without using the card SAM 45, 46, 47 in the toll unit 40, which can be decrypted by the road SAM 43. The description in the second embodiment explains the above authentication strategy in detail. the

[Composition Description] 

FIG. 7 shows a block diagram of the configuration of the wireless communication system 15 in the second embodiment. The wireless communication system 15 is equipped with a vehicle unit 20 carried by a vehicle, a registration unit 50 placed on the roadside, parking area, gas station, etc. unit 60 and information center 70. The same components have the same reference numerals used in the first embodiment, and descriptions of the same components are omitted. The information center 70 is described in the same manner. In addition, although only one vehicle unit 20, registration unit 50, and charging unit 60 are shown in FIG. 7 of the accompanying drawings, a plurality of each unit may be used in an actual system. In addition, the registration unit 50 may be placed at the entrance of a toll road or the like, and a distinguishing label may be affixed thereon so that the user can clearly distinguish it from the toll unit 60 . the

Details of the registration unit 50 are explained by using the block diagram in FIG. 8A. the

The registration unit 50 is equipped with a road SAM 53, a communication interface (I/F) 54, card SAMs 55, 56, 57, a control unit 58, a wireless antenna 51 and a DSRC unit 52. the

The wireless antenna 51 is an antenna for DSRC. The DSRC unit 52 uses the wireless antenna 51 to perform transmission and reception of information by DSRC. the

The road SAM 53 is a unit having a function of encrypting information (including card information) to be transmitted to the vehicle unit 20 and a function of decrypting encrypted card information (other than card information) transmitted from the vehicle unit. the

The communication interface 54 is an interface for communicating with the information center 70 by wired communication. the

The card SAMs 55, 56, 57 are used to encrypt and decrypt information using an encryption method applied to information stored in the IC cards 28a, 28b, 28c corresponding to the card SAMs 35, 36, 37, respectively. the

The control unit 58 is a unit including a central processing unit (CPU), ROM, RAM, I/O, etc., and controls the DSRC unit 52, road SAM 53, communication interface 54, and card SAMs 55, 56, 57 in a unified manner. the

Details of the charging unit 60 are explained below using the block diagram in FIG. 8B. The toll collection unit 60 is equipped with a road SAM 63 and a communication interface 64, a control unit 65 and a wireless antenna 61 and a DSRC unit 62. the

The wireless antenna 61 is an antenna for DSRC. The DSRC unit 62 performs transmission and reception of information by DSRC using the wireless antenna 61 . the

The road SAM 63 is a unit having a function of encrypting information (including card information) to be transmitted to the vehicle unit 20 and a function of decrypting encrypted information received from the vehicle unit 20 (excluding card information). In addition, the encryption method used by the road SAM 63 is the same as that used by the road SAM 53 of the registration unit 50. In other words, information encrypted by the road SAM 53 of the registration unit 50 can be decrypted by the road SAM 63. the

The communication interface (I/F) 64 is an interface for communicating with the information center 70 by wired communication. the

The control unit 65 is a unit including a central processing unit (CPU), ROM, RAM, I/O, etc., and controls the DSRC unit 62, road SAM 63, communication interface 64 in a unified manner. the

[Instructions]

The operation of the wireless communication system 15 is explained below. the

(1) Card information registration process

First, the card information registration process regarding the information to be registered in the vehicle unit 20 stored in the IC card (one of the IC cards 28a, 28b, 28c) is described with reference to the sequence diagram in FIG. In this case, well-known parts of the DSRC protocol are omitted from the description for simplicity and brevity. the

When the vehicle unit 20 receives the BST (beacon service table) from the registration unit 50 after entering the communication area of the registration unit 50 (S405), the vehicle unit 20 sends a response requesting the IC card ("selection card" in the figure) (S410 ). In this case, it is assumed that the IC card interface of the vehicle unit 20 cannot communicate with the IC card (that is, it is assumed that the IC card is not near the IC card interface 25). the

If there is no response from the IC card before a predetermined time, the vehicle unit 20 transmits a VST (Vehicle Service Table) to the registration unit 50 to inform the registration unit 50 that there is no IC card (S415). the

When the vehicle unit 20 receives the BST again from the registration unit 50 after a predetermined interval (S420), the vehicle unit 20 transmits a response requesting the IC card (S430). If the IC card can communicate with the IC card interface 25 (if the IC card is near the IC card interface 25), a response (ATR in the figure) is sent from the IC card to the vehicle unit 20 (S435). Then, the vehicle unit 20 transmits a VST to the registration unit 50 to notify the registration unit 50 of the presence of the IC card (S440). the

Then, mutual authentication (S450) is performed between the control unit 58 of the registration unit 50 and the vehicle unit 20, and in the card SAM (card SAM 55, 56, 57) of the registration unit 50, it is compatible with the encryption method for the current IC card. Mutual authentication is performed between the corresponding card (SAM) and the IC card (S455). the

If the mutual authentication is normal, the control unit 58 of the registration unit 50 transmits a card information reading instruction (S460) to the vehicle unit 20, and the vehicle unit 20 receiving this instruction uses the IC card interface 25 to read the encrypted card from the IC card Information (S465). In this case, "card information" means card number, expiration date, name information, card issuer number, card type, amount, usage history information, and the like. the

The vehicle unit 20 that has read the encrypted card information transmits the encrypted card information to the control unit 58 of the registration unit 50 (S470). the

The control unit 58 of the registration unit 50 receiving the encrypted card information transfers the card information to a card SAM corresponding to the card information (ie, the card SAM capable of decrypting the card information) (S475). The card SAM receiving the encrypted card information decrypts the encrypted card information, and transfers the decrypted information to the control unit 58 (S480). the

The control unit 58 having received the decrypted card information checks the card information (S485). More specifically, the control unit 58 checks whether the decryption is normal, whether the decrypted card information contains no difference, and the like. In this case, the card information may be retrieved from the information center 70 via the communication interface 54 for verification, or the card information may be transmitted to the information center 70 for verification at the information center 70 . the

If it is determined that the card information is normal, the control unit 58 of the registration unit 50 delivers the decrypted card information to the road SAM 53 (S487). The road SAM 53 that has received the decrypted card information encrypts the card information and delivers the information to the control unit 58 (S488). the

The control unit 58 having received the encrypted card information transmits the card information to the vehicle unit 20 (S490). the

The vehicle unit 20 that has received the encrypted card information stores the received information in the memory 26 (S495). Thereafter, whenever the charging unit 60 requests to transmit the encrypted card information, it is not necessary to determine that communication with the IC card is feasible, and the vehicle unit 20 transmits the card information stored in the memory 26 to the charging unit 60 rather than from the IC card. card to retrieve card information. the

(2) Charge process

The process of charging through communication between the vehicle unit 20 and the charging unit 60 will be described below with reference to the sequence diagram in FIG. 10 . In this case, well-known parts of the DSRC protocol are omitted from the description for simplicity and brevity. the

When the vehicle unit 20 receives the BST (beacon service table) from the charging unit 60 after entering the communication area (S505), the vehicle unit 20 determines whether the IC card information of the application corresponding to the charging unit 60 is stored in the memory 26, and if The IC card information is stored in the charging unit 60 and VST (Vehicle Service Table) is transmitted to notify the charging unit 60 that the IC card information is stored (S510). the

Then, mutual authentication is performed between the control unit 65 of the charging unit 60 and the vehicle unit 20 (S515). the

If the mutual authentication is normal, a card information reading command is transmitted from the control unit 65 of the charging unit 60 to the vehicle unit 20 (S525). Then, the control unit 27 of the vehicle unit 20 reads the encrypted card information stored in the memory 26 and corresponding to the specified application (S530). Then, the encrypted card information that has been read is sent to the charging unit 60 (S535). the

The control unit 65 of the charging unit 60 having received the encrypted card information transmits the card information to the road SAM (S540). The road SAM having received the encrypted card information transmits the encrypted card information to the control unit 65 after decrypting the encrypted card information (S545). the

The control unit 65 having received the decrypted card information performs a charging process (S550). More specifically, the control unit 65 performs a payment process by transmitting card information using the communication interface 64, or performs a process of reducing the amount of money in the card information stored in the memory 26 of the vehicle unit 20.

(3) Historical information writing process

The history information writing process is the same as the history information process in the above-mentioned first embodiment. That is, the history information writing process in the second embodiment replaces the process with respect to the charge unit 40 with the process with respect to the charge unit 60 . the

[Effect of this embodiment]

The wireless communication system 15 has the same effects as in the first embodiment. In addition, the wireless communication system 15 in the second embodiment has the following effects. the

Due to the above-described operation scheme, the wireless communication system 15 in the second embodiment is not required to have a card SAM provided for each encryption method in the IC card. the

[Third embodiment]

[Composition Description] 

FIG. 11 is a block diagram showing the configuration of the wireless communication system 17 in the third embodiment. The wireless communication system 17 includes a vehicle unit 120 carried by a vehicle, a cellular phone 130 capable of being carried by a user, and a card center server 140 placed in a credit card company. In this case, the vehicle unit 120 and the cellular phone 130 can communicate through DSRC, and the communication between the cellular phone 130 and the card central server 140 is provided through the wireless public communication network 150 of the cellular phone company or the like. In addition, while the cellular phone 130 and the wireless public communication network 150 are wirelessly connected, the card center server 140 and the wireless public network 150 are connected by wired communication. the

Next, details of the vehicle unit 120 are explained using the block diagram in FIG. 12A. The vehicle unit 120 is equipped with a wireless antenna 121, a DSRC unit 122, an HMI 123, a SAM 124, a non-contact communication interface (I/F) 125, a memory 126, and a control unit 127. the

The wireless antenna 121 is used for dedicated short-range communication (DSRC). the

The DSRC unit 122 uses the wireless antenna 121 to perform information transmission and reception by DSRC. the

The HMI 123 is a unit that provides an interface (human-machine interface) for communication between humans and devices. More specifically, the interface includes operating buttons, LEDs and/or speakers. the

The SAM 124 performs encryption and decryption of information communication with roadside units not shown, and encrypts/decrypts vehicle unit information (management number, form registration number, vehicle number, etc.). In addition, the SAM 124 also performs encryption/decryption of the credit card ID of the vehicle unit mentioned later. the

The non-contact communication interface 125 is an interface for performing short-range wireless communication with the cellular phone 130 in a non-contact manner. In addition to communication with the cellular phone 130, non-contact short-range wireless communication can also be provided to devices such as non-contact type IC cards through this interface 125. Furthermore, in this case communication can be provided via a contact type communication interface. the

The memory 126 includes devices (eg, flash memory) that do not require memory content for storing various information to remain operational. the

The control unit 127 includes a central processing unit (CPU), ROM, RAM, I/O, etc., and controls the DSRC unit 122, the HMI 123, the SAM 124, the non-contact communication interface 125, and the memory 126 in a unified manner. the

The details of the cellular phone 130 are explained below using the block diagram in FIG. 12B. The cellular phone 130 is equipped with a wireless antenna 131, a common communication unit 132, an HMI 133, a SAM 134, a contactless communication contact (I/F) 135, a memory 136, and a control unit 137. the

The wireless antenna 131 is used for wireless connection with the wireless public communication network 150 . the

The common communication unit 132 uses the wireless antenna 131 to perform information transmission and reception by wireless communication (eg, CDMA communication, etc.). the

The HMI 133 is a unit that provides an interface (human-machine interface) for communication between humans and devices. More specifically, the interface includes operation buttons, a liquid crystal display, a speaker, a microphone, and the like. the

The contactless communication interface 135 is an interface for executing the vehicle unit 120 . In addition to communicating with vehicle devices 120, communication may also be provided via interface 135 to devices using contactless short-range communication. Furthermore, in this case, communication may be provided via a contact-type communication interface. the

The memory 136 includes devices (eg, flash memory) that do not require memory content for storing various information to remain operational. In this case, the memory 136 stores credit ID information (ie, an ID issued by a credit company for payment) for the cellular phone. the

The control unit 137 includes a central processing unit (CPU), ROM, RAM, I/O, etc., and controls the common communication unit 132, the HMI 133, the non-contact communication interface 135, and the memory 136 in a unified manner. the

The details of the card center server 140 are explained below using the block diagram in FIG. 13 . the

The card central server 140 is equipped with a common communication unit 142, an HMI 143, a SAM 144, and a vehicle card ID generator 145. the

The public communication unit 142 performs communication with the cellular phone 130 using the wireless public communication network 150 . the

The HMI 143 is a unit that provides an interface (human-machine interface) for communication between humans and devices. More specifically, the interface includes operating a keyboard, a mouse, a display, and the like. the

The SAM 144 is a unit having the same function as the SAM 124 of the vehicle unit 120, and performs encryption/decryption of communication information when the server 140 communicates with the vehicle unit 120 through the wireless public network 150 and the cellular phone 130. Although the card central server 140 has the SAM 144 in the present embodiment, different servers can have functions equivalent to the SAM 144, and functions on different servers can be used for encryption/decryption. the

The vehicle card ID generator 145 generates a credit ID for a vehicle unit (hereinafter referred to as a vehicle card ID) based on a predetermined ID. The credit ID of the vehicle unit is the same type as the credit ID of the cellular phone, and the credit ID of the vehicle unit is stored in the vehicle unit. Retrieve the credit ID of the vehicle unit when requesting the payment process. the

[Instructions]

The operation of the wireless communication system 17 is explained below. the

(1) Vehicle card ID registration process (the whole process) 

The entire process of registering the vehicle card ID with the vehicle unit 120 is explained using the sequence diagram in FIG. 14 . the

When the power of the vehicle unit 120 is turned on, the non-contact communication interface 125 generates a card response request signal at predetermined intervals (S605). The cellular phone 130 that has received the response request responds to the response request with a response indicating the presence of the card (S610). Then, the vehicle unit 120 transmits a registration request to the cellular phone 130 (S615). the

The cellular phone 130 having received the registration request transmits the registration request and the cellular phone card ID stored in the memory 126 to the card central server 140 (S620). the

The control unit of the card central server 140 which received the registration request and the cellular phone card ID performs verification of the cellular phone card ID (S625). More specifically, the control unit 147 checks the authenticity of the cellular phone card ID, determines whether the issuance of the vehicle card ID should be performed, and identifies the credit card holder corresponding to the cellular phone card ID. the

When the control unit 147 of the card central server 140 finishes checking of the cellular phone card ID, the control unit 147 sends an instruction to the SAM 144 to perform mutual authentication with the vehicle unit 120 (S630). the

The SAM 144 that receives the mutual authentication instruction performs mutual authentication with the vehicle unit 120 (that is, with the SAM 124 of the vehicle unit 120) after requesting the mutual authentication to the vehicle unit 120. Mutual authentication can be performed by various methods such as a random number generation method. When mutually authenticated successfully, set up the communication channel of the encrypted information between the SAM 144 of the card central server 140 and the SAM124 of the vehicle unit 120, and the channel of setting up is used for subsequent communication between the vehicle unit 120 and the card central server 140. In this case, in the transparent communication process, the cellular phone 130 transmits the encrypted information received by the public communication unit 132 from the card central server 140 as it is output from the non-contact communication interface 135 to be transmitted to the vehicle unit 120. Encrypted information, and the encrypted information received by the non-contact communication interface 135 from the vehicle unit 120 is transmitted as it is to the common communication unit 132 to be transmitted to the card center server 140 . the

If the mutual authentication is successful, the SAM 144 of the card central server 140 sends a notification (S640) that the mutual authentication is completed to the control unit 147. the

The control unit 147 of the card central server 140 which received the mutual authentication completion notification generates a vehicle card ID for the credit card holder identified in step S625 (S645). the

The control unit 147 of the card central server 140 instructs the SAM 144 to send the generated vehicle card ID to the vehicle unit 120 after encryption (S650). the

The SAM 144 of the card central server 140 that receives the transmission instruction encrypts the vehicle card ID, and after outputting the encrypted vehicle card ID from the public communication unit 142 to the public communication network 150, sends the encrypted vehicle card ID to the vehicle unit 120 through the cellular phone 130. vehicle card ID (S655). the

The vehicle unit 120 that has received the vehicle card ID decrypts the received card ID using the SAM 124 to store in the memory 126 (S660). Then, when the storage of the card ID is completed, the vehicle unit 120 transmits a completion notice indicating completion of the storage to the card center server 140 (S665). the

The SAM 144 of the card central server 140 that has received the completion notification decrypts the completion notification and delivers the notification to the control unit 147 (S670). The control unit 147 having received the completion notice transfers the completion notice to the cellular phone 130 (S675). the

The cellular phone 130 that has received the completion notification notifies the user of the cellular phone 130 about the completion from the HMI 133 (S680). For example, a message "vehicle card ID registration complete" is displayed on the display unit. the

In the subsequent process, when the vehicle unit 120 receives a vehicle card ID retrieval request from the roadside unit, etc., the vehicle card ID is encrypted by the SAM 124 to pass the DSRC following the above-mentioned registration process for storing the vehicle card ID in the vehicle unit 120. Unit 122 sends to the roadside unit. In this case, since the sending process is the same as the charging process in the first and second embodiments, description of the sending process is omitted. the

(2) Vehicle card ID registration process (vehicle unit side)

Details of the process performed by the control unit 127 of the vehicle unit 120 in the above-described vehicle card ID registration process (overall process) are described with reference to the flowchart in FIG. 15 . In this case, when power is supplied to the vehicle unit, the vehicle card ID registration process (on the vehicle unit side) starts. the

When the vehicle card ID registration process (vehicle unit side) starts, the control unit 127 of the vehicle unit 120 transmits a card response request through the contactless communication interface 125 (S705). Then, it is determined whether there is any response from the contactless communication interface 125 within a predetermined period (for example, within 10 seconds) (S710). When a response is detected (S710: Yes), the process proceeds to step S715. When no response is detected (S710: NO), the process remains at the current step until a response is detected. the

In step S715 following determination that a response is detected, the control unit 127 determines whether the device that has responded to the request can be used for vehicle card ID registration. When it is determined that the device can be used (S715: Yes), the process proceeds to step S720. When it is determined that the device cannot be used (S715: NO), the process proceeds to step S755. the

The control unit 127 sends a registration request to the device that has responded (ie, to the cellular phone 130). the

Then, mutual authentication with the card center server 140 is performed upon a request from the card center server 140 (S725). More specifically, the SAM 124 of the vehicle unit 120 and the SAM 144 of the card central server 140 perform mutual authentication with each other. the

Then, it is determined whether the mutual authentication is successful (S730). When the mutual authentication is successful (S730: YES), the process proceeds to step S735. When the mutual authentication is unsuccessful (S730: NO), the process proceeds to step S750. In this case, when the mutual authentication is successful, a channel for encrypted information to be exchanged between the SAM 144 of the card central server 140 and the SAM 124 of the vehicle unit 120 is established, and the channel is used for the vehicle unit thereafter 120 and the communication between the card central server 140. the

In step S735 following the determination that the mutual authentication is successful, the control unit 127 receives the vehicle card ID. That is, the control unit 127 receives the vehicle card ID transmitted from the card center server through the cellular phone 130 . the

Once the vehicle card ID is received, the control unit 127 stores (ie registers) it in the memory 126 . Then, the control unit 127 notifies the card center server 140 via the cellular phone 130 that the registration is completed (S745). Then, the current process (vehicle card ID registration process (vehicle unit side)) is ended. the

On the other hand, in step S750 following determination that the mutual authentication has failed, the control unit 127 notifies the card central server 140 of the error via the cellular phone 130 . Then, the process continues to step S755. the

In step S755, the user of the vehicle unit 120 is notified of the error. More specifically, for example, together with the accompanying guidance message output from the speaker, lighting the LED indicates that registration of the vehicle card ID with the vehicle unit has failed. Then, the current process (vehicle card ID registration process (vehicle unit side)) is ended. the

(3) Vehicle card ID registration process (card central server side)

Details of the process performed by the control unit 147 of the card center server 140 in the above-described vehicle card ID registration process (overall process) are described with reference to the flowchart in FIG. 16 . In this case, when power is supplied to the card center server 140, the vehicle card ID registration process (card center server side) starts. the

When the vehicle card ID registration process (card center server side) in the control unit 147 of the card center server 140 starts, the control unit 147 determines whether any registration request is received from the vehicle unit 120 (S805). When it is determined that the registration request is received (S805: YES), the process proceeds to step S810. When it is determined that the request has not been received (S805: NO), the process remains at the current step until the request is received. the

In step S810 following the determination that the registration request is received, the cellular phone card ID is checked. More specifically, the control unit 147 checks the authenticity of the cellular phone card ID, determines whether issuance of the vehicle card ID should be performed, and identifies the credit card holder corresponding to the cellular phone card ID. the

Then, it is determined whether the verification result of the cellular phone card ID is correct (S815). When it is determined that the card ID is correct (S815: YES), the process proceeds to step S820. When it is determined that the card ID is incorrect (S815: NO), the process proceeds to step S860. the

In step S820 following after determining that the cellular phone card ID is correct, a mutual authentication instruction is issued to the SAM 144 to perform authentication with the vehicle unit 120. The SAM 144 that receives the execution mutual authentication instruction executes the mutual authentication after requesting the mutual authentication to the vehicle unit 120 (ie, the SAM 124 of the vehicle unit 120). Then, when the mutual authentication is successful, the SAM 144 notifies the control unit 147 of the mutual authentication success. the

At step S830, the process branches according to the result of the mutual authentication. That is, whether mutual authentication is successful or not affects the process. When the mutual authentication is successful (S830: Yes), the process proceeds to step S835, and when the process is not successful (S830: No), the process proceeds to step S860. the

In step S835 following the determination that the mutual authentication is successful, the vehicle card ID generator 145 is instructed to generate a vehicle card ID. Then, the generated vehicle card ID is encrypted by the SAM 144 to be sent to the vehicle unit 120 through the cellular phone 130 (S840). the

Then, a notification from the vehicle unit 120 is received (S845). This notification is one of the following two: represent that the vehicle unit 120 has received the vehicle card ID and the normal end notification of registration completion (i.e. the notification in the above-mentioned step S745), or represent that the vehicle unit 120 has received the vehicle card ID but its registration is unsuccessful The error notification (that is, the notification in the above step S750). the

Then, at step S850, the process determines whether the notification received at step S845 is a normal end notification. When it is determined that the notification is a normal end notification (S850: YES), the process proceeds to step S855. When it is determined that the notification is an error notification (S850: NO), the process proceeds to step S860. the

In step S855 following the determination that the notification is a normal end notification, the process notifies the cellular phone 130 of the normal end of the process. This normal end notification is used to display the normal end of the process on the display screen of the cellular phone 130 . Then, the current process (vehicle card ID registration process (card center server side)) ends itself. the

In step S860, the process notifies the cellular phone 130 of an error in the process. This error notification is for an error in the display process on the display screen of the cellular phone 130 . Then, the current process (vehicle card ID registration process (card center server side)) ends itself. the

[Effect of this embodiment]

The wireless communication system 17 in the third embodiment can store the vehicle card ID to the memory 126 without any special device (for example, a registration unit, etc.), and can send the ID to the vehicle unit 120 only when the card central server side agrees to issue the ID. Send ID. Therefore, the usability for credit card users is improved without reducing the reliability of the credit card system. the

In addition, the card ID is encrypted at the card central server 140 and decrypted at the vehicle unit 120, thereby making it difficult to eavesdrop on the card ID during communication. the

In addition, the vehicle unit 120 and the server 140 perform mutual authentication before communicating with each other, thereby effectively preventing fraud such as spoofing. the

Additionally, the ID registration in the vehicle unit 120 is sent via the cell phone 130 to the server 140 which is then redirected back to the cell phone 130 . In this way, ID registration in the vehicle unit 120 and notification of registration to the card central server 140 are transmitted and notified to the user of the cellular phone 130 . Therefore, the sense of security of the credit card user can be improved. the

[Other embodiments]

Although the present invention has been fully described with reference to the preferred embodiments thereof with reference to the accompanying drawings, it is to be noted that various changes and modifications will be apparent to those skilled in the art. the

(1) In the first embodiment described above, there are two types of roadside units, ie, the registration unit 30 and the charging unit 40 in the wireless communication system. However, it is possible to use roadside units with both types of functions in one entity to produce the same effect. The system in the second embodiment can have the same variants. the

(2) In the first embodiment described above, the information is first encrypted by the SAM in the registration unit 30 to be stored in the IC card. However, the information retrieved from the memory 26 of the vehicle unit 20 may be stored in the IC card without encryption depending on the type of information. the

In this way, the registration unit 30 can be omitted from the information writing process of writing information in the IC card, thereby allowing information to be stored in the IC card when communication to the registration unit 30 is not available. The same advantages apply to the second embodiment. the

(3) The wireless communication system 17 in the third embodiment stores the ID in the memory 136 of the cellular phone 130 and transmits the ID to the server 140 . However, instead of the ID sent from the memory 136, the ID/password, other specific codes, etc. may be input from operation buttons on the cellular phone 130, and the server 140 may verify the input ID/password on the server side. In this way, the third embodiment obtains the same advantages. the

Such changes and modifications should be understood as being within the scope of the present invention as defined by the appended claims. the

Claims (11)

1. A first roadside unit (30) comprising: a first wireless communication unit (32), which processes wireless communication signals; a first security unit (33), which decrypts the encrypted information; and a first controller (38) that controls said first wireless communication unit (32) and said first security unit (33) in a unified manner, Wherein when the encrypted information is received from the vehicle unit (20) by the first wireless communication unit (32), the encrypted information is decrypted by the first security unit (33) for authenticity After the authenticity check, the first controller (38) transmits the encrypted information to the vehicle unit (20) through the first wireless communication unit (32). 2. A first roadside unit (30) as claimed in claim 1, wherein a plurality of first security units (33) are provided corresponding to each of a plurality of encryption types used in the external storage medium used in the vehicle unit (20). 3. A first roadside unit (30) as claimed in claim 1 or 2, wherein said first security unit is capable of encrypting said information, The first controller (38) uses the first security unit to encrypt data received from the vehicle unit (20) via the first wireless communication unit (32) to be stored in the (20) the information in the external storage medium, and send the encrypted information to the vehicle unit (20) through the first wireless communication unit (32). 4. A first roadside unit (50) comprising: a first wireless communication unit (52), which processes wireless communication signals; A first security unit (53) having an encryptor for encrypting information and a decryptor for decrypting information; and a first controller (58) that controls said first wireless communication unit (52) and said first security unit (53) in a unified manner, Wherein, when the encrypted information is received from the vehicle unit (20) by the first wireless communication unit (52), the encrypted information is decrypted by the first security unit (53) for authenticity After authenticity verification and re-encryption of the decrypted information, the first controller (58) transmits the encrypted information to the vehicle unit (20) via the first wireless communication unit (52). 5. A first roadside unit (50) as claimed in claim 4, Wherein said first security unit (53) has a plurality of decryptors to accommodate each of a plurality of encryption types used in said external storage medium. 6. A first roadside unit (50) as claimed in claim 4 or 5, The first controller (58) uses the first security unit (53) to encrypt data received from the vehicle unit (20) through the first wireless communication unit (52) to be stored in the the information in the external storage medium of the vehicle unit (20), and transmit the encrypted information to the vehicle unit (20) through the first wireless communication unit (52). 7. A second roadside unit (40, 60) comprising: a second wireless communication unit (42, 62) that processes wireless communication signals; a second security unit (43, 63), which decrypts the encrypted information; and a second controller (48, 65) that controls said second wireless communication unit (42, 62) and said second security unit (43, 63) in a unified manner, Wherein, after sending the request to the vehicle unit (20), the second controller (48, 65) receives from the memory (26) of the vehicle unit (20) the The encrypted information checked in and used for the intended application by decrypting said encrypted information received with said second security unit (43, 63). 8. A second roadside unit (50) as claimed in claim 7, wherein a plurality of second security units (33) are provided corresponding to each of a plurality of encryption types used in the external storage medium for the vehicle unit (20). 9. A server (140) comprising: a server communication unit (142), which communicates with the portable terminal (130) through a wireless public network; and a server controller (147) which controls said server communication unit (142) in a unified manner, Wherein the server controller (147) receives the first identification information from the portable terminal (130) through the server communication unit (142), checks the authenticity of the first identification information, and once the first identification information is verified The authenticity of the identification information generates second identification information corresponding to the first identification information and then sends the second identification information to the portable terminal (130) through the server communication unit (142). 10. The server (140) of claim 9, wherein said server also includes a server security unit (144) for encrypting and decrypting information, and The server controller (147) sends the second identification information encrypted by the server security unit (144) to the portable terminal (130). 11. The server (140) of claim 9 or 10, Wherein when the server controller (147) receives a notification from the vehicle unit (120) through the portable terminal (130), the server controller (147) sends the portable terminal (130) the notify.

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