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Proceedings Paper

Access Protocol For An Industrial Optical Fibre LAN
Author(s): John M. Senior; William M. Walker; Alan Ryley
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Paper Abstract

A structure for OSI levels 1 and 2 of a local area network suitable for use in a variety of industrial environments is reported. It is intended that the LAN will utilise optical fibre technology at the physical level and a hybrid of dynamically optimisable token passing and CSMA/CD techniques at the data link (IEEE 802 medium access control - logical link control) level. An intelligent token passing algorithm is employed which dynamically allocates tokens according to the known upper limits on the requirements of each device. In addition a system of stochastic tokens is used to increase efficiency when the stochastic traffic is significant. The protocol also allows user-defined priority systems to be employed and is suitable for distributed or centralised implementation. The results of computer simulated performance characteristics for the protocol using a star-ring topology are reported which demonstrate its ability to perform efficiently with the device and traffic loads anticipated within an industrial environment.

Paper Details

Date Published: 17 September 1987
PDF: 13 pages
Proc. SPIE 0734, Fibre Optics '87, (17 September 1987); doi: 10.1117/12.937996
Show Author Affiliations
John M. Senior, Manchester Polytechnic (United Kingdom)
William M. Walker, Manchester Polytechnic (United Kingdom)
Alan Ryley, Manchester Polytechnic (United Kingdom)

Published in SPIE Proceedings Vol. 0734:
Fibre Optics '87
Lionel R. Baker, Editor(s)

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