Thoughts about redundancy in fieldbus systems anchored in OSI Layer-4 and applied to the Lontalk Protocol on neuron based network nodes

Author

Loy, Dietmar ; Schmalek, Richard

Author_Institution

Inst. of Comput. Technol., Tech. Univ. Wien, Austria

fYear

1995

fDate

4-6 Oct 1995

Firstpage

21

Lastpage

26

Abstract

Fault-tolerance in fieldbus systems can be accomplished on different OSI layers. Nowadays most fieldbus systems supporting redundancy at the physical layer are based on layer 2 characteristics. Some examples like MIL-STD-1553B, Profibus, CAN, XR-III are presented at the beginning, giving an insight into the state of the art. A new approach for network redundancy is introduced, utilizing inherent fault-tolerance capabilities in the OSI reference model. In more detail we concentrate on Layer-4, the transport layer, which establishes a reliable end to end communication. Detecting duplicate data packets is a service provided in this layer and this service will be the basis for our thoughts about redundancy. An enhanced LONWORKS based network node is presented capable of handling multiple redundant communication media

Keywords

field buses; open systems; protocols; redundancy; LONWORKS; Layer-4; Lontalk Protocol; OSI Layer-4; fault-tolerance capabilities; fieldbus systems; network node; network redundancy; neuron based network nodes; redundancy; redundant communication media; transport layer; Fault detection; Fault tolerance; Fault tolerant systems; Field buses; Intelligent networks; Open systems; Physical layer; Protocols; Railway safety; Redundancy;

fLanguage

English

Publisher

ieee

Conference_Titel

Factory Communication Systems, 1995. WFCS '95, Proceedings., 1995 IEEE International Workshop on

Conference_Location

Leysin

Print_ISBN

0-7803-3059-5

Type

conf

DOI

10.1109/WFCS.1995.482646

Filename

482646