Adding local priority-based dispatching mechanisms to P-NET networks: a fixed priority approach

• Type: Article in International Conference Proceedings Book
• Date: 1999

Authors

Eduardo Tovar (Author) Other; Francisco Vasques (Author) FEUP; Alan Burns (Author) Other

Conference proceedings International

Title: PROCEEDINGS OF THE 11TH EUROMICRO CONFERENCE ON REAL-TIME SYSTEMS

Pages: 175-184

11th Euromicro Conference on Real-Time Systems (EUROMICRO-RTS 99)

YORK, ENGLAND, JUN 09-11, 1999

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-001-65R

DOI: 10.1109/emrts.1999.777464

Abstract (EN): In this paper we address the real-time capabilities of P-NET, which is a multi-master fieldbus standard based on a virtual token passing scheme. We show how P-NETS medium access control (MAC) protocol is able to guarantee a bounded access time to message requests. We then propose a model for implementing fixed priority-based dispatching mechanisms at each master's application level. in this way, we diminish the impact of the first-come-first-served (FCFS) policy that P-NET uses at the data link layer. The proposed model rises several issues well known within the real-time systems community message release jitter; pre-run-time schedulability analysis in non pre-emptive contexts; non-independence of tasks at the application level. We identify these issues in the proposed model and show how results available for priority-based task dispatching can be adapted to encompass priority-based message dispatching in P-NET networks.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10