Wireless communication system, vehicle unit, roadside unit and server

• US 20080056495A1
• Filed: 09/04/2007
• Published: 03/06/2008
• Est. Priority Date: 09/05/2006
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Hanai, Shouichirou, Eguchi, Osamu
• Application Number:
  US11/899,357
• Publication Number:
  US 20080056495A1
• Time in Patent Office: Days
• US Class Current: 380/270
• CPC Class Codes: G07B 15/063 using wireless information transmission between the vehicle and a fixed station identification of vehicles G08G

Abstract

A wireless communication system provides a decryption module for decrypting card information on a roadside unit for information registration and a roadside unit 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 are smaller in number in comparison to the vehicle units at the time of system operation with greater allowance for demand for space efficiency and cost reduction.

Claims

1. A wireless communication system having a vehicle unit, a first roadside unit and a second roadside unit,

the vehicle unit comprising:

a vehicle side wireless communication unit that processes a wireless communication signal;

an interface unit that retrieves encrypted information from an external memory medium that is used for storing the encrypted information;

a storage that stores information; and

a vehicle side controller that controls in a unified manner the vehicle side wireless communication unit, the interface unit and the storage,

the first roadside unit comprising;

a first wireless communication unit that processes the wireless communication signal;

a first security unit that decrypts the encrypted information; and

a first controller that controls in a unified manner the first wireless communication unit and the first security unit, and

the second roadside unit comprising;

a second wireless communication unit that processes the wireless communication signal;

a second security unit that decrypts the encrypted information; and

a second controller that controls in a unified manner the second wireless communication unit and the second security unit,

wherein the vehicle side controller transmits the encrypted information that is retrieved from the external memory medium with the interface unit to the first roadside unit by way of the vehicle side wireless communication unit,

the first controller transmits the encrypted information that is received from the vehicle unit through the first wireless communication unit back to the vehicle unit with the first wireless communication unit after verifying authenticity of a content of the encrypted information by decrypting the encrypted information with the first security unit,

the vehicle side controller stores in the storage the encrypted information that is received from the first roadside unit through the vehicle side wireless communication unit, and thereafter transmits the encrypted information that is stored in the storage through the vehicle side wireless communication unit to the second roadside unit upon having a transmission request for the encrypted information stored in the external memory medium from the second roadside unit, and

the second controller puts the encrypted information that is received by sending a request to the vehicle unit for use by a predetermined application after decrypting the encrypted information with the second security unit.

2. The wireless communication system of claim 1,

wherein the first roadside unit has plural first security units for accommodating each of plural encryption types that are used in the external memory medium, and

wherein the second roadside unit has plural second security units for accommodating each of plural encryption types that are used in the external memory medium.

3. The wireless communication system of claim 1,

wherein the first security unit is capable of encrypting information,

the interface unit is capable of writing the information on the external memory medium,

the vehicle side controller transmits the information through the vehicle side wireless communication unit to the first roadside unit when the information is stored in the external memory medium,

the first roadside unit transmits encrypted information to the vehicle unit through the first wireless communication unit after encrypting the information that is received from the vehicle unit through the first wireless communication unit by using the first security unit, and

the vehicle side controller writes on the external memory medium through the interface unit the encrypted information received from the first roadside unit through the vehicle side wireless communication unit.

4. A wireless communication system having a vehicle unit, a first roadside unit and a second roadside unit,

the vehicle unit comprising:

a vehicle side wireless communication unit that processes a wireless communication signal;

an interface unit that retrieves encrypted information from an external memory medium that is used for storing the encrypted information;

a storage that stores information; and

a vehicle side controller that controls in a unified manner the vehicle side wireless communication unit, the interface unit and the storage,

the first roadside unit comprising;

a first wireless communication unit that processes the wireless communication signal;

a first security unit having an encryptor that encrypts information and a decryptor that decrypts information; and

a first controller that controls in a unified manner the first wireless communication unit and the first security unit, and

the second roadside unit comprising;

a second wireless communication unit that processes the wireless communication signal;

a second security unit that decrypts the encrypted information; and

a second controller that controls in a unified manner the second wireless communication unit and the second security unit,

wherein the vehicle side controller transmits the encrypted information that is retrieved from the external memory medium with the interface unit to the first roadside unit by way of the vehicle side wireless communication unit,

the first controller transmits the encrypted information that is received from the vehicle unit through the first wireless communication unit back to the vehicle unit with the first wireless communication unit after verifying authenticity of a content of the encrypted information by decrypting the encrypted information and re-encrypting the decrypted information with the first security unit,

the vehicle side controller stores in the storage the encrypted information that is received from the first roadside unit through the vehicle side wireless communication unit, and thereafter transmits through the vehicle side wireless communication unit to the second roadside unit the encrypted information that is stored in the storage upon having a transmission request for the encrypted information stored in the external memory medium from the second roadside unit, and

the second controller puts the encrypted information that is received by sending a request to the vehicle unit for use by a predetermined application after decrypting the encrypted information with the second security unit.

5. The wireless communication system of claim 4,

wherein the first security unit has plural decryptors for accommodating each of plural encryption types that are used in the external memory medium.

6. The wireless communication system of claim 4,

wherein the interface unit is capable of writing information on the external memory medium,

the vehicle side controller transmits the information to the first roadside unit through the vehicle side wireless communication unit when the information is stored in the external memory medium,

the first controller transmits through the first wireless communication unit to the vehicle unit the information that is received from the vehicle unit through the first wireless communication unit after encrypting the information with the first security unit, and

the vehicle side controller writes on the external memory medium with the interface unit the encrypted information that is received from the first roadside unit through the vehicle side communication unit.

7. A vehicle unit comprising:

a vehicle side wireless communication unit that processes a wireless communication signal;

an interface unit that retrieves encrypted information from an external memory medium that is used for storing the encrypted information;

a storage that stores information; and

a vehicle side controller that controls in a unified manner the vehicle side wireless communication unit, the interface unit and the storage,

wherein the vehicle side controller transmits the encrypted information that is retrieved from the external memory medium with the interface unit to a first roadside unit by way of the vehicle side wireless communication unit, and

the vehicle side controller stores the encrypted information in the storage after verifying and transmitting the encrypted information from first roadside unit, and thereafter transmits through the vehicle side wireless communication unit to a second roadside unit the encrypted information that is stored in the storage upon having a transmission request from the second roadside unit for the encrypted information stored in the external memory medium.

8. The vehicle unit of claim 7,

wherein the interface unit is capable of writing the information on the external memory medium, and

the vehicle side controller transmits the information to the first roadside unit through the vehicle side wireless communication unit, receives through the vehicle side wireless communication unit the encrypted information that is encrypted in the first roadside unit, and writes through the interface unit on the external memory medium the encrypted information.

9. A first roadside unit comprising:

a first wireless communication unit that processes the wireless communication signal;

a first security unit that decrypts the encrypted information; and

a first controller that controls in a unified manner the first wireless communication unit and the first security unit,

wherein the first controller transmits the encrypted information through the first wireless communication unit to the vehicle unit after decrypting the encrypted information for authenticity verification by using the first security unit when the encrypted information is received from the vehicle unit with the first wireless communication unit.

10. The first roadside unit of claim 9,

wherein plural first security units are disposed in correspondence to each of encryption types that are used in the external memory medium for use in the vehicle unit.

11. The first roadside unit of claim 9,

wherein the first security unit is capable of encrypting the information,

the first controller encrypts by using the first security unit the information that is received through the first wireless communication unit from the vehicle unit to be stored in the external memory medium used in the vehicle unit, and transmits the encrypted information through the first wireless communication unit to the vehicle unit.

12. A first roadside unit comprising:

a first wireless communication unit that processes the wireless communication signal;

a first security unit having an encryptor that encrypts information and a decryptor that decrypts information; and

a first controller that controls in a unified manner the first wireless communication unit and the first security unit,

wherein the first controller transmits the encrypted information through the first wireless communication unit to the vehicle unit after decrypting the encrypted information for authenticity verification and re-encrypting the decrypted information by using the first security unit when the encrypted information is received from the vehicle unit with the first wireless communication unit.

13. The first roadside unit of claim 12,

wherein the first security unit has plural decryptors for accommodating each of plural encryption types that are used in the external memory medium.

14. The first roadside unit of claim 12,

the first controller encrypts by using the first security unit the information that is received through the first wireless communication unit from the vehicle unit to be stored in the external memory medium used in the vehicle unit, and transmits the encrypted information through the first wireless communication unit to the vehicle unit.

15. A second roadside unit comprising:

a second wireless communication unit that processes the wireless communication signal;

a second security unit that decrypts the encrypted information; and

a second controller that controls in a unified manner the second wireless communication unit and the second security unit,

wherein the second controller decrypts the encrypted information that is received after sending a request to the vehicle unit by using the second security unit for use in a predetermined application.

16. The first roadside unit of claim 15,

wherein plural second security units are disposed in correspondence to each of plural encryption types that are used in the external memory medium for use in the vehicle unit.

17. A wireless communication system having a vehicle unit, a portable terminal and a server,

the vehicle unit comprising:

a first vehicle communication unit that communicates with a roadside unit;

a second vehicle communication unit that communicates with the portable terminal;

a vehicle storage that stores information; and

a vehicle controller that controls the first vehicle communication unit, the second vehicle communication unit and the vehicle storage in a unified manner,

the portable terminal comprising;

a first portable communication unit that communicates with the server through a wireless public network;

a second portable communication unit that communicates with the vehicle unit; and

a portable controller that controls the first portable communication unit and the second portable communication unit in a unified manner, and

the server comprising;

a server communication unit that communicates with the portable terminal through the wireless public network; and

a server controller that controls the server communication unit in a unified manner,

wherein the portable controller transmits first identification information to the server through the first portable communication unit,

the server controller checks authenticity of the first identification information received by the server communication unit, generates second identification information that corresponds to the first identification information upon verifying authenticity of the first identification information and transmits the second information to the portable terminal through the server communication unit,

the portable controller transmits the second identification information received by the first portable communication unit to the vehicle unit through the second portable communication unit, and

the vehicle controller stores the second identification information on the vehicle storage and transmits the second identification information stored on the vehicle storage to the roadside unit through the first vehicle communication unit upon having a request for the second identification information from the roadside unit when the vehicle controller receives the second identification information from the portable terminal with second vehicle communication unit.

18. The wireless communication system of claim 17,

wherein the vehicle unit further comprises a vehicle security unit that encrypts and decrypts information,

the server further comprises a server security unit that encrypts and decrypts information,

the server controller transmits the second identification information encrypted by the server security unit to the portable terminal,

the vehicle controller stores the second identification information received from the portable terminal on the vehicle storage after decryption by the vehicle security unit, and transmits the second identification information to the roadside unit after encryption by the vehicle security unit.

19. The wireless communication system of claim 18,

wherein the server controller and the vehicle controller authenticate with each other respectively by using the server security unit and the vehicle security unit before the server controller transmits the second identification information.

20. The wireless communication system of claim 17,

wherein the portable terminal further comprises a notification unit that provide a notice,

the vehicle controller notifies the server of storage of the second identification information through the portable terminal,

the server controller transmits a notice of storage to the portable terminal upon having the notice of storage from the vehicle unit through the portable terminal, and

the portable controller controls the notification unit to provide the notice of storage upon having the notice of storage from the server.

21. A vehicle unit comprising:

a first vehicle communication unit that communicates with a roadside unit;

a second vehicle communication unit that communicates with a portable terminal;

a vehicle storage that stores information; and

a vehicle controller that controls the first vehicle communication unit, the second vehicle communication unit and the vehicle storage in a unified manner,

wherein the vehicle controller stores the second identification information on the vehicle storage when the vehicle controller receives the second identification information from the portable terminal through the second vehicle communication unit, and thereafter transmits the second identification information stored in the vehicle storage to the roadside unit through the first vehicle communication unit upon having a request for the second identification information from the roadside unit.

22. The vehicle unit of claim 21,

wherein the vehicle unit further comprises the vehicle security unit that encrypts and decrypts information, and

the vehicle controller stores the second identification information received from the portable terminal in an encrypted form after decryption by the vehicle security unit, and transmits the second identification information to the roadside unit after encryption by vehicle security unit.

23. The vehicle unit of claim 21

wherein the vehicle unit further comprises a notification unit that provides a notice, and

the vehicle controller provide a notice of storage to the server through the portable terminal after storing the second identification information.

24. A server comprising:

a server communication unit that communicates with a portable terminal through a wireless public network; and

a server controller that controls the server communication unit in a unified manner,

wherein the server controller receives a first identification information from the portable terminal through the server communication unit, checks authenticity of the first identification information, generates the second identification information that corresponds to the first identification information upon verifying authenticity of the first identification information and transmits the second identification information to the portable terminal through the server communication unit after.

25. The server of claim 24,

wherein the sever further comprises a server security unit that encrypts and decrypts information, and

the server controller transmits to the portable terminal the second identification information that is encrypted by the server security unit.

26. The server of claim 24,

wherein the server controller transmits a notice to the portable terminal when the server controller receives the notice from the vehicle unit through the portable terminal.