System for transmitting data between two bus systems

• US 7,089,343 B2
• Filed: 04/22/2002
• Issued: 08/08/2006
• Est. Priority Date: 04/20/2001
• Status: Active Grant

• Current Assignee: Harman Becker Automotive Systems GmbH (Samsung Electronics Co. Ltd.)
• Original Assignee: Harman Becker Automotive Systems GmbH (Samsung Electronics Co. Ltd.)
• Inventors: Bähren, Frank
• Primary Examiner(s): Perveen, Rehana
• Assistant Examiner(s): DALEY, CHRISTOPHER ANTHONY
• Application Number:
  US10/127,351
• Publication Number:
  US 20020161960A1
• Time in Patent Office: 1,569 Days
• Field of Search: 710/306, 710/106, 710/21, 710/33, 710/27, 710/305, 710/315
• US Class Current: 710/306
• CPC Class Codes: G06F 13/4027 using bus bridges G06F13/4022 takes precedence

Abstract

An interface for transmitting messages between two bus systems includes a receiver device for receiving a message from the first bus system, a classification device for classifying the message received from the first receiver device according to one of several predetermined classes, a translation device for translating the message based on a predetermined rule for each class into a message for transmission on the second bus system, and a transmitter device for transmitting the translated message on the second bus system.

Claims

1. An interface for transmission of messages between a Controller Area Network (CAN) bus system and a Media Oriented Systems Transport (MOST) bus system, comprising:

a first receiver for receiving a message from the CAN bus system;

a first classification device for classifying the message received from the first receiver device according to one of a plurality of predetermined classes;

a first translation device for translating the message into a message for transmission on the MOST bus system based on a rule specified for each class; and

a first transmitter for transmitting the translated message on the MOST bus system.

2. The interface of claim 1, comprising:

a second receiver for receiving a message from the MOST bus system;

a second classification device for classifying the message received from the second receiver according to one of several predetermined classes;

a second translation device for translating the message into a message for transmission on the CAN bus system based on a rule specified for each class; and

a second transmitter for transmitting the translated message on the CAN bus system.

3. The interface of claim 2, wherein the first and second classification devices define the class of a received message based on a classification datum contained in the message.

4. The interface of claim 2, comprising a timer which, upon receiving a message from one of the bus systems, controls a cyclic transmission of the translated message on the other bus system.

5. The interface of claim 2, comprising a repetition-rate-adjustment device to control the transmission of the messages obtained by translation of messages transmitted on one of the bus systems at a first repetition rate, and at a second repetition rate on the other bus system.

6. The interface of claim 5, comprising a counter for counting the messages of a certain class arriving on one of the bus systems and for triggering transmission of the translated message on the other bus system when the count of the counter exceeds a limit.

7. The interface of claim 6, where when the count of the counter exceeds a limit, it is reloaded with a predetermined value.

8. The interface of claim 7, comprising a comparator for comparing a message of a given class received by one of the bus systems with a message of the same class previously received by the one bus system and for outputting the received message if its content differs from that of the previously received message of the same class.

9. The interface of claim 7, where the first translation device includes a permutation unit for permuting elements of the received message.

10. The interface of claim 7, where the first translation device includes an arithmetic unit for applying a mathematical computational rule to an element of the message.

11. The interface of claim 7, where the first translation device is program-controlled and is connected to a memory for storing the rules for translation in program form.

12. A method for transmitting a message from a Controller Area Network (CAN) bus system to a Media Oriented Systems Transport (MOST) bus system, comprising:

classifying the message received from the CAN bus system according to one of a plurality of predetermined classes;

selecting a translation rule based on the classification;

translating the message based on the translation rule; and

outputting the translated message on the MOST system.

13. The method of claim 12, where the step of classifying includes identification of a classification datum in the message.

14. The method of claim 12, where for at least one class of messages, the step of outputting is cyclically repeated.

15. The method of claim 12, where for at least one class of messages, a received message is compared with a previously received message of the same class, and the step of outputting is performed only if the content of the received message differs from that of the previously received message.

16. The method of claim 15, where the step of translating includes a permutation of the elements of the message.

17. The method claim 15, where the step of translating includes the application of a mathematical computational rule to an element of the message.

18. A method for transmitting a message from a Media Oriented Systems Transport (MOST) bus system to a Controller Area Network (CAN) bus system, comprising:

classifying the message received from the MOST bus system according to one of several predetermined classes;

selecting a translation rule based on the classification;

translating the message based on the translation rule; and

transmitting the translated message onto the CAN bus system.