Bus system consisting of at least two data buses

• US 20040158362A1
• Filed: 04/06/2004
• Published: 08/12/2004
• Est. Priority Date: 03/15/2001
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hartwich, Florian, Fuehrer, Thomas, Hugel, Robert, Mueller, Bernd
• Granted Patent: US 7,616,560 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: G05B 2219/25031 TTCAN bus, time triggered can bus
• CPC Class Codes: G06F 11/008 Reliability or availability analysis
• CPC Class Codes: G06F 13/4054 where the function is bus cycle extension, e.g. to meet the timing requirements of the target bus
• CPC Class Codes: G06F 13/4286 using a handshaking protocol, e.g. RS232C link
• CPC Class Codes: H04J 3/0652 Synchronisation among time division multiple access [TDMA] nodes, e.g. time triggered protocol [TTP] bus network with centralized control in which slots are of a TDMA packet structure H04L12/4035
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 2012/40241 Flexray

Abstract

A bus system includes at least two data buses, the first data bus having a first number of users and the second data bus having a second number of users. At least two TTCAN buses, which are interlinked by users connected simultaneously to both TTCAN buses, are used as the data buses. Fewer users than the sum of the number of users of the first TTCAN bus and the number of users of the second TTCAN bus are connected to the two TTCAN buses at the same time. A generating arrangement is included to generate a scalable fault tolerance in the bus system as a function of the number of users connected to the at least two TTCAN buses at the same time.

Claims

1. A bus system comprising at least two data buses, the first data bus having a first number of users and the second data bus having a second number of users,

wherein at least two TTCAN buses are used as the data buses, the TTCAN busses being interlinked in such a manner by users connected simultaneously to both TTCAN buses, that fewer users than the sum of the number of users of the first TTCAN bus and the number of users of the second TTCAN bus are connected to the two TTCAN buses at the same time, means being included for generating a scalable fault tolerance in the bus system as a function of the number of users connected to the at least two TTCAN buses at the same time.

2. The bus system as recited in claim 1,

wherein the TTCAN buses, as at least one coupled pair of data buses, are interconnected by at least one user.

3. The bus system as recited in claim 1,

wherein means (SL, SLZ) are provided by which the at least two TTCAN buses are synchronized.

4. The bus system as recited in claim 3,

wherein the first means are designed so that the global time is synchronized when there is at least one coupled pair of TTCAN buses.

5. The bus system as recited in claim 3,

wherein the first means are designed so that the cycle time is synchronized when there is at least one coupled pair of TTCAN buses.