Using the planning scheduler in real-time fieldbuses: Theoretical model for run-time overhead

• Type: Article in International Conference Proceedings Book
• Date: 1997

Authors

Luis Almeida (Author) Other; Pasadas, R (Author) Other; Fonseca, JA (Author) Other

Conference proceedings International

Title: WFCS '97 - 1997 IEEE INTERNATIONAL WORKSHOP ON FACTORY COMMUNICATION SYSTEMS, PROCEEDINGS

Pages: 103-109

1997 IEEE International Workshop on Factory Communication Systems (WFCS 97)

BARCELONA, SPAIN, OCT 01-03, 1997

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 2 Citations

Other information

Authenticus ID: P-001-D1M

Abstract (EN): A typical approach to real-time fieldbus arbitration is the use of an off-line scheduler that generates a cyclic static table containing the allocation of bus-time-slots to the broadcasting of process control variables. In this article the use of a planning scheduler is proposed instead. This scheduler compromises between the advantages and disadvantages of typical dynamic and static scheduling. Particularly, it allows for higher operational flexibility than the traditional cyclic static approaches and presents a lower run-time overhead than the traditional dynamic approaches. A possible implementation of the planning scheduler is described and a theoretical model is presented for the run-time overhead caused by the scheduler on art average-case assumption. The validity of the model is checked against the results of several experiments conducted on an experimental low-cost real-time fieldbus.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7