Process and components for controlling the connections of a transmission system

• US 6,643,689 B2
• Filed: 06/14/1999
• Issued: 11/04/2003
• Est. Priority Date: 09/12/1996
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Pasch, Hans-Lothar, Rode, Detlef, Zurmuehl, Uwe
• Primary Examiner(s): Yao, Kwang Bin
• Assistant Examiner(s): NGUYEN, HANH N
• Application Number:
  US09/254,897
• Publication Number:
  US 20030006647A1
• Time in Patent Office: 1,604 Days
• Field of Search: 370/241, 370/242, 370/245, 370/251, 370/248, 370/311, 370/400, 370/401, 370/360-365, 370/451, 370/276, 370/277, 370/278, 709/208, 709/209, 709/210-212, 710/110, 710/100
• US Class Current: 709/209
• 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: H04L 12/4135 using bit-wise arbitration
• CPC Class Codes: H04L 2012/40215 Controller Area Network CAN
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle

Abstract

A method for supervising the connections of a transmission system, the method establishing a logical connection between two components, such that one component in each case assumes the functions of a main component. The components for carrying out the method must have devices which allow hierarchical operation of the transmission system.

Claims

1. A method for supervising a first logical connection of a transmission system, the transmission system including a bidirectional transmission line and at least two physical components coupled to the transmission line, each of the physical components including at least one logical component, the method comprising the steps of:

allocating an address to the at least one logical component, the address corresponding to a function of the at least one logical component;

transmitting a request by a first logical component of the at least one logical component of one of the physical components for establishing the first logical connection between the first logical component and a second logical component of the at least one logical component of another one of the physical components; and

providing the first logical connection between the first logical component and the second logical component using the second logical component, the first logical component performing a monitoring function and a control function for the first logical connection, one of the first logical component and the second logical component performing a termination function for the first logical connection;

wherein the first logical component assumes a master status with respect to the first logical connection, and in response to a request, concurrently assumes a slave status with respect to a second logical connection.

2. The method according to claim 1, wherein a motor vehicle includes the transmission system.

3. The method according to claim 1, wherein the second logical component performs the monitoring and termination functions for the first logical connection.

4. The method according to claim 1, further comprising the step of:

initializing the transmission system by transmitting a transmission identifier using the at least one logical component.

5. The method according to claim 1, further comprising the step of:

maintaining the first logical connection by cyclically transmitting telegram signals for a physical connection of at least one of the physical components.

6. The method according to claim 5, further comprising the step of:

monitoring the physical connection in the transmission system by cyclically transmitting a test signal of the telegram signals to the physical connection.

7. The method according to claim 6, further comprising the step of:

switching the transmission system into a sleep mode in an absence of the telegram signals on the transmission line within a predefined time.

8. The method of claim 1 wherein each physical component has exactly one physical interface to the transmission line.

9. The method of claim 8 wherein at least one of the physical components includes a plurality of logical components, the plurality of logical components sharing a physical interface to the transmission line.

10. The method according to claim 1, wherein each of the physical components includes a single logical component.

11. The method according to claim 1, further comprising:

adding an additional logical component to the transmission system, wherein the additional logical component is configured as a slave component; and

outputting user information regarding a functionality of the additional logical component.