Method and device for data transmission over several parallel lines, in particular optical fibers

US4756025A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Dieter Munz · Annaberg-Buchholz, DE
• Gerhard Rumold · Bubenreuth, DE
• Klaus Schmiedel

Key dates

• Filing date: Oct 7, 1986
• Grant date: Jul 5, 1988
• Expiry date: Oct 7, 2006

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L25/14
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method and device for data transmission over several parallel lines, in particular over optical fibers is described for transmitting measured values from a measuring station arranged at a high-voltage line to an evaluating electronic system at a high data rate, a high utilization of the available transmission lines, preferably optical fibers, is desirable. To this end, via a clock line, clock messages are relayed which are separated from each other by a synchronization interval (P2) and which begin at least with a fixed clock message portion (PT), which may preferably be followed by a freely usable clock message portion. The receiver recognizes each message start by the synchronization interval of the clock messages and forms during the fixed clock message portion synchronous sampling pulses, which may be followed by asynchronous sampling pulses for the duration of the free clock message portion. The transmitter can now send via data lines data messages which begin synchronously with the fixed clock message portions and need not contain any fixed programmed pulses for the recognition of telegram messages.