Vehicle-control communication system

• US 6,360,152 B1
• Filed: 11/09/1999
• Issued: 03/19/2002
• Est. Priority Date: 03/31/1999
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Ishibashi, Koichi, Seno, Shoichiro
• Primary Examiner(s): Nguyen, Tan
• Assistant Examiner(s): Tran, Dalena
• Application Number:
  US09/436,257
• Time in Patent Office: 861 Days
• Field of Search: 701/33, 701/48, 701/41, 701/29, 701/45, 701/1, 701/54, 701/114, 701/102, 701/36, 709/103, 180/268, 713/151, 713/156, 380/283, 340/3.1, 340/3.44, 340/459, 307/9.1, 714/11, 370/235
• US Class Current: 701/48
• CPC Class Codes: H04L 12/40 Bus networks
• CPC Class Codes: H04L 12/40019 Details regarding a bus master
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle

Abstract

A vehicle-control communication system, in which a plurality of control function units such as ECI (engine control) are separated into an I/O processing function and an operation control function, and the I/O processing function for each control function unit comprises I/O processing nodes, while the operation control function is formed as one of the operation control nodes for each of vehicle control groups each obtained by integrating control function units with a relation therebetween into one group. Transmit-receive of information within each of the vehicle control groups is executed via any of first communication lines, while transmit-receive of information between the vehicle control groups is executed via a second communication line.

Claims

1. A vehicle-control communication system for dividing controls for a plurality of devices incorporated in a vehicle to a plurality of prespecified control function units, detecting status information required for controlling the corresponding control function unit by a plurality of sensors by the plurality of control function units, and controlling driving of a plurality of actuators each as a target for control by the corresponding control function unit according to the detected status information and information from the other control function units;

wherein

the plurality of control function units are divided into a plurality of control function groups; and

each of said plurality of control function groups comprises;

a plurality of I/O processing units for executing input/output processing to said sensors and said actuators corresponding to a plurality of control function units in the corresponding control function group by the plurality of control function units;

an operation processing unit for executing a plurality of operation processing corresponding to the plurality of control function units according to the information inputted from the plurality of I/O processing units, and outputting each result of the operation processing to the plurality of corresponding I/O processing units respectively; and

a first communication bus for connecting said plurality of I/O processing units to each other and to said operation processing unit; and

said plurality of control function groups are connected to each other by a second communication bus for connecting said operation processing units to each other within the plurality of control function groups.

2. The vehicle-control communication system according to claim 1;

wherein said first communication unit within the plurality of control function groups connects at least two or more of said control function groups to each other.

3. The vehicle-control communication system according to claim 1;

wherein a format of information to be transmitted and received by said first communication unit, said second communication unit, and said communication unit is a standardized information format.

4. The vehicle-control communication system according to claim 1;

wherein each of said plurality of I/O processing units and said plurality of operation processing units further comprises an identifying unit for adding identifying information specific to the vehicle-control communication system to information to be transmitted via said first communication unit, said second communication unit, and said communication unit, transmitting the information, and also performing identification of received information.

5. The vehicle-control communication system according to claim 1;

wherein each of said plurality of I/O processing units and said plurality of operation processing units further comprises an encrypting/decrypting unit for encrypting information to be transmitted via said first communication unit, said second communication unit, and said communication unit using an encryption key, and decrypting the encrypted information.

6. A vehicle-control communication system for dividing controls for a plurality of devices incorporated in a vehicle to a plurality of prespecified control function units, detecting status information required for controlling the corresponding control function unit by a plurality of sensors by the plurality of control function units, and controlling driving of a plurality of actuators each as a target for control by the corresponding control function unit according to the detected status information and information from the other control function units;

said system comprising;

a plurality of I/O processing units for executing input/output processing to said sensors and said actuators corresponding to the plurality of control function units by said plurality of control function units;

a plurality of operation processing units for dividing said plurality of control function units into a plurality of control function groups, executing a plurality of operation processing corresponding to said plurality of control function units according to the information inputted from said plurality of I/O processing units at least belonging to the plurality of divided control function groups, and outputting each result of the operation processing to the plurality of corresponding I/O processing units within the control function group; and

a communication bus for connecting said plurality of I/O processing units to each other and to said plurality of operation processing units.

7. The vehicle-control communication system according to claim 6 further comprising a scheduler for adjusting schedules for transmit-receive of information between said plurality of I/O processing units and said plurality of operation processing units.

8. The vehicle-control communication system according to claim 7;

wherein said scheduler is provided in any of said plurality of operation processing units.

9. The vehicle-control communication system according to claim 8;

wherein each of said plurality of I/O processing units and said plurality of operation processing units has at least a normal mode to shift to a status of a normal processing operation and a maintenance mode to shift to a status of system maintenance; and

said scheduler monitors the status of transmission by said plurality of I/O processing units and said plurality of operation processing units, transmits an alarm message using said communication unit to said plurality of I/O processing units and said plurality of operation processing units when any abnormal condition is detected, and shifts said plurality of I/O processing units and said plurality of operation processing units from the normal mode to the maintenance mode.

10. The vehicle-control communication system according to claim 6;

wherein a format of information to be transmitted and received by said first communication unit, said second communication unit, and said communication unit is a standardized information format.

11. The vehicle-control communication system according to claim 6;

wherein each of said plurality of I/O processing units and said plurality of operation processing units further comprises an identifying unit for adding identifying information specific to the vehicle-control communication system to information to be transmitted via said first communication unit, said second communication unit, and said communication unit, transmitting the information, and also performing identification of received information.

12. The vehicle-control communication system according to claim 6;

wherein each of said plurality of I/O processing units and said plurality of operation processing units further comprises an encrypting/decrypting unit for encrypting information to be transmitted via said first communication unit, said second communication unit, and said communication unit using an encryption key, and decrypting the encrypted information.

13. A vehicle control system for controlling plural diverse vehicle functions comprising:

at least two vehicle control groups, each said control group performing a plural related vehicle functions, each said vehicle control group including,

a group communication bus;

at least two control functional units, each control functional unit being connected to said group communication bus, each said control functional unit also communicating with at least a sensor or actuator and performing a vehicle function and having a processor communicating with its associated said sensors and actuators,

an operation control node, connected to said communication bus and performing operational control of said control functional units, said operation control node having a control node processor and receiving information from and providing information to said control functional units on said group communication bus; and

the operation control nodes of each said vehicle control group communicating with each other.

14. The vehicle control system of claim 13 wherein said system further comprises a vehicle communication bus interconnecting said operation control nodes of said at least two vehicle control groups to facilitate communication therebetween.

15. The vehicle control system of claim 14 wherein said control node processors are relatively high speed processors and said vehicle communication bus has a relatively high bandwidth and said group communication bus has a relatively low bandwidth.

16. The vehicle communication system of claim 15 wherein each said control functional unit is connected to those sensors and actuators associated therewith and not through a said group communication bus.

17. A vehicle communication system for controlling plural diverse vehicle functions, said system comprising:

at least two control function groups, each control function group controlling at least two vehicle functions;

an operation control unit corresponding to each control function group, said operation control unit performing operation control for the corresponding control function group;

at least two control function units corresponding to each operation control unit, each control function unit providing process controls for the control of a vehicle function;

an input/output processing unit corresponding to each control function unit, said input/output processing unit receiving process controls from the corresponding control function unit and executing the process controls including generating vehicle control data; and

a first communication unit connected between each operational control unit and its corresponding control function units, said first communication unit permitting mutual communication directly between each control function group.

18. The system of claim 17, wherein the first communication unit permits an operation control unit corresponding to a first control group to obtain vehicle control data from an operation control unit of a second control group.

19. The system of claim 17, further comprising:

a second communication unit connected between at least two input/output processing units and said operation control unit; and

said operation control unit receiving vehicle control data from each input/output processing unit and directing the vehicle control data to the corresponding control function unit.

20. The system of claim 17, wherein the first communication unit permits each operation control unit to communicate with the other operation control units and access data from the input/output processing units and the control function units.

21. The system of claim 17, wherein said input/output processing units include sensors for obtaining vehicle function data and actuators to adjust vehicle functions into a target range.

22. The system of claim 17, wherein said operation control unit receives vehicle control data from said input/output processing units via said second control unit and directs said vehicle function data to an appropriate control function unit such that there is cooperation between control function units.

23. The system of claim 17, wherein said operation control unit transmits vehicle process control instructions from each control function unit to said corresponding input/output control processing unit via said second communication unit.

24. The system of claim 17, wherein said first communication unit is a communication bus.

25. The system of claim 17, further comprising:

a scheduler connected to the first communication unit, said scheduler for adjusting schedules for transmit-receive of information between said plurality of input/output processing units and said plurality of operation processing units.

26. The system of claim 17, wherein

a processor is not connected between any of the control function groups.