CN1960347A

CN1960347A - Wireless car borne gateway system

Info

Publication number: CN1960347A
Application number: CN 200610137680
Authority: CN
Inventors: 刘衍珩
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2006-11-06
Filing date: 2006-11-06
Publication date: 2007-05-09

Abstract

The invention comprises: car network interface, radio network interface and security protocol switching module. Wherein, the car network interface is connected to the car network; the radio network interface is used in connecting the radio network device; the security protocol switching module is used to encrypt the messages transmitted through car bus line and to send them to the internet through the radio network device, or to decrypt the messages received from the internet through the radio network device and to send them to the car bus line through car network interface.

Description

Wireless car borne gateway system

Technical field

The present invention relates to radio communication, computer network and automotive automation field, is a kind of gateway device that utilizes Wireless Telecom Equipment that the Internet is connected with In-vehicle networking.

Background technology

Along with the fusion in automobile of electronic technology, information technology, collection machinery, Electrical and Electronic one are the Hyundai Motor technology of representative, use by the high sedan limousine of price and to be penetrated into gradually among the common people's family saloon, also enter among the family saloon thereupon with the closely-related In-vehicle networking of these technology.In-vehicle networking produces different types of network at different times because of different demands, as use the earliest, the most extensive, supporting technology and the abundantest controller local area network CAN of components and parts; Automobile low side network---the local network LIN that connects; Vehicle-mounted media network MOST etc.In intelligent transportation system, an automobile should have the function that receives and relevant information is provided, as receiving management information, receive geographical map information, send this car state information, send security service request etc., if these information spinners are provided by In-vehicle networking.

Entered since 21 century, mobile communication has obtained major progress, and the scale of the Internet is also in rapid expansion simultaneously.These two kinds of information technologies are moved towards to merge, thereby have broken through based on the suffered space-time restriction in the Internet of wired mode.Along with the sequential use of various wireless access technologys such as GPRS, CDMA, IEEE802.11 and bluetooth etc., increasing mobile device can be by wireless technology and traditional internet communication.Just because of increasing in a large number of Internet internet access facility, the limitation of IPv4 shows especially out, and the present IPv6 standard widely of using gradually, the a series of characteristics that itself have because of its technology, directly support outstanding mobility, fail safe and service quality etc. as unlimited huge address space, IP layer almost, make it become the technical foundation of mobile communication and the Internet converged.

The extensive use in life of the application of intelligent transportation system and mobile communication certainly will make automobile become a portable terminal on the Internet.Can provide any network information service in office or family on the following automobile, car owner and vehicle supervision department can understand automobile information whenever and wherever possible and automobile is controlled.Realize that these functions must make the user can receive information, the control In-vehicle networking of In-vehicle networking by the Internet the Internet In-vehicle networking and Internet Internet connection.

Summary of the invention

The invention provides a kind of gateway apparatus that utilizes Wireless Telecom Equipment that the Internet is connected with In-vehicle networking.This gateway apparatus comprises: In-vehicle networking interface, radio network interface and security protocol switching module.Wherein, the In-vehicle networking interface links to each other with various In-vehicle networkings, i.e. CAN, LIN network etc.; Radio network interface is used to connect radio networking device, is connected to the Internet by radio networking device; Security protocol switching module is used for receiving the information that In-vehicle networking sends and sending it to the information that connection corresponding remote equipment on the internet maybe will send by the Internet from the remote equipment that radio network interface receives from the In-vehicle networking interface sending to corresponding In-vehicle networking.

Description of drawings

Fig. 1 is the wireless car borne gateway system assumption diagram.

Fig. 2 is the security protocol switching module workflow diagram.

Embodiment

Hardware is formed as shown in Figure 1, wherein:

● processor adopting ARM series CPU, recommend ARM920T (1)

● memory can adopt 32MB RAM (recommending to use 64MB RAM), 16MB flash

● radio network interface (2) can adopt serial ports (3), USB interface (4), pcmcia interface (5)

● Wireless Telecom Equipment (6) can adopt CDMA dial number card, GPRS dial number card

● In-vehicle networking interface (7) connects the spi bus interface (8) of CAN, and plate carries CAN host node (10) and uses SJA1000 conversion chip and ARM controller chip as the CAN controller, the I of LIN ²C bus interface (9), plate are carried LIN node (11) and are used TJA1020 conversion chip and ARM controller chip as the LIN Node Controller

Software is formed:

● embedded OS uses (SuSE) Linux OS

● driver Wireless Telecom Equipment driver, serial port drive program, USB driver of modules, PCMCIA driver of modules; The In-vehicle networking driver, CAN driver, LIN driver

● application security protocol conversion module, dial-up program use the PPP dialing

After possessing above-mentioned software and hardware basis, need in embedded OS, to load the driver of relevant device, comprise: the driver of Wireless Telecom Equipment (as the CDMA dial number card of serial ports, USB or pcmcia interface), the factory chamber of commerce of this driver Wireless Telecom Equipment provides; The driver of In-vehicle networking module (as the CAN bus module), the factory chamber of commerce of this driver In-vehicle networking module provides.After the said equipment can normally use, further work was to realize security protocol switching module.

The program circuit of security protocol switching module as shown in Figure 2, wherein the left side receives message for this gateway apparatus and is forwarded to the process of corresponding In-vehicle networking from the Internet, and the right side sends to In-vehicle networking information for this gateway apparatus the process of connection corresponding remote equipment on the internet.Security protocol switching module is a web application, realizes with the C language.This application program at first connects with the network program of remote server operation, waits for information that the receiving remote server sends then or sends information to remote server.These information are encrypted earlier before entering the Internet, submit to the preceding deciphering earlier of remote server or In-vehicle networking.Cryptographic algorithm can be any symmetric encipherment algorithm, as DES, AES etc.To the definition of function between In-vehicle networking and the remote service program and the protocol format of transmission information, this gateway apparatus need not understood, promptly this gateway apparatus just transmits information transmitted by the Internet as content between In-vehicle networking and remote server, encrypts when information is transmitted in the Internet.

The workflow that this gateway apparatus is complete is as follows:

1. system power-up, pilot operationp system start-up, operating system loads Wireless Telecom Equipment (6) and drives and In-vehicle networking device drives and security protocol switching module;

2. the security protocol switching module program connects remote server and represents that this gateway is online;

3. teleprogram sends to instruct and requires it to return the current state of automobile to this gateway place automobile, the encrypted back of this instruction message is sent to the Wireless Telecom Equipment (6) of this gateway by the Internet, security protocol switching module receives this instruction message and deciphering by radio network interface (2) from Wireless Telecom Equipment (6), then it is transferred to corresponding In-vehicle networking by In-vehicle networking interface (7);

4. In-vehicle networking obtains the state of automobile and this information is transferred to security protocol switching module by In-vehicle networking interface (7) according to this instruction, security protocol switching module sends the message to remote server by radio network interface (2) from Wireless Telecom Equipment (6) after with this information encryption, and remote server is received deciphering after this message and the state information of reading automobile.

Claims

1 one kinds of car borne gateways are used for realizing utilizing equipment for surfing the net by the Internet automobile to be carried out remote access and control, comprising: vehicle-mounted bus interface, radio network interface and security protocol switching module.Wherein: vehicle-mounted bus interface links to each other with various In-vehicle networkings; Radio network interface is used to connect Wireless Communication Equipment, is connected to the Internet by Wireless Communication Equipment; Security protocol switching module is used for receiving the information that In-vehicle networking sends and sending it to the information that connection corresponding equipment for surfing the net on the internet maybe will send by the Internet from the equipment for surfing the net that radio network interface receives from vehicle-mounted bus interface sending to corresponding vehicle-mounted bus.

2 according to the described car borne gateway of claim 1, it is characterized in that: equipment for surfing the net is any equipment that can be connected to the Internet, comprises personal computer, the server computer that is connected to the Internet, the mobile phone that is connected to the Internet that are connected to the Internet, is connected to the PDA of the Internet etc.; Equipment for surfing the net communicates remote access and the control that realizes automobile by the Internet and wireless car borne gateway.

3 according to the described car borne gateway of claim 1, and it is characterized in that: this device provides vehicle-mounted bus interface, is used to connect In-vehicle networking, and In-vehicle networking comprises CAN, MOST, LIN bus but is not limited to these buses; This device provides radio network interface, is used to connect Wireless Communication Equipment, connects the Internet by Wireless Communication Equipment, and wireless device comprises the equipment of communication protocols such as supporting CDMA, GPRS but is not limited to these agreements; This device is supported IPv4 and IPv6 network.

4 according to the described car borne gateway of claim 1, and it is characterized in that: security protocol switching module is encrypted information transmitted in the In-vehicle networking before entering the Internet, and the information of internet transmission is decrypted before entering In-vehicle networking.

5 one kinds of methods with In-vehicle networking and Internet connection, this method transmits the content of information transmitted in the In-vehicle networking as the bag that transmits in the Internet, by the Internet automobile is carried out the equipment for surfing the net and the identical agreement of In-vehicle networking use of remote access and control like this, car borne gateway need not understood the In-vehicle networking agreement; Information in the In-vehicle networking both can not made an amendment direct content as network packet and transmitted, and also can encrypt the back to it and transmit, and was decrypted after the reception.