Method of processing messages to be transmitted for a data processing arrangement

• US 5,901,156 A
• Filed: 06/05/1995
• Issued: 05/04/1999
• Est. Priority Date: 02/22/1985
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Dais, Siegfried, Botzenhardt, Wolfgang, Kiencke, Uwe, Krampe, Wolfgang, Litschel, Martin
• Primary Examiner(s): Elmore, Reba I.
• Assistant Examiner(s): Marc, McDieunel, Marc, McDieunel
• Application Number:
  US08/465,059
• Time in Patent Office: 1,429 Days
• Field of Search: 371/32, 371/33, 370/85.6, 370/85.4, 340/825.5, 340/825.51, 364/131, 364/132, 364/200, 395/575, 395/303, 395/650, 395/732, 395/725, 375/347, 380/9, 380/20, 380/49, 455/505, 455/524
• US Class Current: 714/748
• CPC Class Codes: B60R 16/0315 using multiplexing techniques multiplexing for transmission of signals G08C15/00; multiplexing for electrical communication in general H04J
• CPC Class Codes: F02D 41/266 the computer being backed-up or assisted by another circuit, e.g. analogue
• CPC Class Codes: F02P 5/1502 using one central computing unit
• CPC Class Codes: G06F 11/0736 in functional embedded systems, i.e. in a data processing system designed as a combination of hardware and software dedicated to performing a certain function testing or monitoring of automated control systems G05B23/02
• CPC Class Codes: G06F 11/0739 in a data processing system embedded in automotive or aircraft systems
• CPC Class Codes: G06F 11/0745 in an input/output transactions management context input/output processing in general G06F13/00
• CPC Class Codes: G06F 11/0763 by bit configuration check, e.g. of formats or tags
• CPC Class Codes: G06F 11/0772 Means for error signaling, e.g. using interrupts, exception flags, dedicated error registers
• CPC Class Codes: G06F 11/10 Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
• CPC Class Codes: G06F 13/374 using a self-select method with individual priority code comparator
• CPC Class Codes: H04L 1/0082 fields explicitly indicating existence of error in data being transmitted, e.g. so that downstream stations can avoid decoding erroneous packet; relays
• CPC Class Codes: H04L 12/40163 by assigning priority to messages according to a message field
• CPC Class Codes: H04L 12/4135 using bit-wise arbitration
• CPC Class Codes: H04L 2001/0094 Bus
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle
• CPC Class Codes: H04L 25/026 Arrangements for coupling transmitters, receivers or transceivers to transmission lines; Line drivers duplexing arrangements H04L5/14
• CPC Class Codes: H04L 25/0272 Arrangements for coupling to multiple lines, e.g. for differential transmission
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A method is disclosed for the operation of a data processing system for motor vehicles including at least two computers and a line connecting the computers for the transmission of messages. This line permits a fast and reliable data transmission between the computers installed in the motor vehicle, taking into account the specific requirements of a controller-coupling in the motor vehicle. An embodiment is provided which describes in detail the interface between the individual computers and the line linking the computers, and with the aid of which a controller-coupling is realized in the vehicle.

Claims

1. A method of processing messages in an individual user station connected to a bus line adapted to interconnect a plurality of individual user stations, the method comprising the steps of:

causing each message to include an identifier, which contains information as to the content of the message and determines the priority of the message on the bus line compared to other messages;

comparing the identifier to a list stored in the individual user station and, in response to said comparison, assigning an internal processing priority independent of the priority of the message on the bus line; and

,

causing the internal processing priority to determine the sequence of messages ready for transmission in the individual user station at every point of time.

2. The method of claim 1, wherein additional data is assigned to the list.

3. The method of claim 2, wherein said data is the transmission status.

4. The method of claim 1, wherein error-laden transmissions are detected and registered.

5. The method of claim 4, wherein the transmission is repeated when an error occurs.

6. The method of claim 5, wherein, after a predetermined number of erroneous transmissions, the repeat of the transmission is stopped and an interrupt request is triggered.

7. The method of claim 1, wherein the list contains an information relative to the transmission requests which is determined by the station itself.

8. A method of processing messages in an individual user station connected to a bus line adapted to interconnect a plurality of individual user stations, the method comprising the steps of:

causing each message to include an identifier, which contains information as to the content of the message and determines the priority of the message on the bus line compared to other messages;

comparing the identifier to a list stored in the individual user station and, in response to said comparison, assigning an internal processing priority independent of the priority of the message on the bus line;

performing a search process to identify a first message which has the highest priority and only considering said first message which has the highest priority and only considering said first message for transmission on the bus line; and

,

if said search process later identifies a second message having a higher priority than said first message, then said second message displaces said first message, so that the internal processing priority determines the sequence of messages ready for transmission in the individual user station at every point in time.

9. The method of claim 8, wherein additional data is assigned to the list.

10. The method of claim 9, wherein said data is the transmission status.

11. The method of claim 8, wherein error-laden transmissions are detected and registered.

12. The method of claim 11, wherein the transmission is repeated when an error occurs.

13. The method of claim 12, wherein, after a predetermined number of erroneous transmissions, the repeat of the transmission is stopped and an interrupt request is triggered.

14. The method of claim 8, wherein the list contains an information relative to the transmission requests which is determined by the station itself.

15. A method of processing messages in an individual user station connected to a bus line of a data processing arrangement of a motor vehicle, the bus line being adapted to interconnect a plurality of individual user stations installed on the motor vehicle, the method comprising the steps of:

causing each message to include an identifier, which contains information as to the content of the message and determines the priority of the message on the bus line compared to other messages;

comparing the identifier to a list stored in the individual user station and, in response to said comparison, assigning an internal processing priority independent of the priority of the message on the bus line; and

,

causing the internal processing priority to determine the sequence of messages ready for transmission in the individual user station at every point of time.

16. A method of processing messages in an individual user station connected to a bus line of a data processing arrangement of a motor vehicle, the bus line being adapted to interconnect a plurality of individual user stations installed on the motor vehicle, the method comprising the steps of:

causing each message to include an identifier, which contains information as to the content of the message and determines the priority of the message on the bus line compared to other messages;

comparing the identifier to a list stored in the individual user station and, in response to said comparison, assigning an internal processing priority independent of the priority of the message on the bus line;

performing a search process to identify a first message which has the highest priority and only considering said first message which has the highest priority and only considering said first message for transmission on the bus line; and

,

if said search process later identifies a second message having a higher priority than said first message, then said second message displaces said first message, so that the internal processing priority determines the sequence of messages ready for transmission in the individual user station at every point in time.