Data exchange between users connected by a bus system and having separate time bases

US6842808B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andreas Weigl · Linkenheim-Hochstetten, DE
• Thomas Fuehrer · Ditzingen, DE
• Bernd Müller · Moers, DE
• Florian Hartwich · Reutlingen, DE
• Robert Hugel · Kaufering, DE

Key dates

• Filing date: Jan 4, 2001
• Grant date: Jan 11, 2005
• Expiry date: Mar 4, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/25031
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method and device for the exchange of data in messages between at least two users which are connected by a bus system and have separate time bases, the messages containing the data being transmitted by the users via the bus system; and a first user, in a function as timer, controls the messages as a function of time in such a way that it repeatedly transmits a reference message, which contains time information regarding the time base of the first user, via the bus at a specifiable time interval; the at least second user forms its own time information, using its time base, as a function of the time information of the first user; a correction value is ascertained from the two pieces of time information; and the second user adapts its time information and/or its time base as a function of the correction value.