FTT-ethernet: A flexible real-time communication protocol that supports dynamic QoS management on ethernet-based systems

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Paulo Pedreiras (Author) Other; Paolo Gai (Author) Other; Luis Almeida (Author) FEUP; Giorgio Buttazzo (Author) Other

Journal

Title: IEEE Transactions on Industrial Informatics

Vol. 1 No. 3

Pages: 162-172

ISSN: 1551-3203

Publisher: IEEE

Indexing

ISI Web of Knowledge - 78 Citations

ISI Web of Science

Scopus - 111 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

CORDIS: Technological sciences > Engineering > Computer engineering

Other information

Authenticus ID: P-000-23H

DOI: 10.1109/tii.2005.852068

Abstract (EN): Ethernet was not originally developed,to meet the requirements of real-time industrial automation systems and it was commonly considered unsuited for applications at the field level. Hence, several techniques were developed to make this protocol exhibit real-time behavior, some of them requiring specialized hardware, others providing soft-real-time guarantees only, or others achieving hard real-time guarantees with different levels of bandwidth efficiency. More recently, there has been an effort to support quality-of-service (QoS) negotiation and enforcement but there is not yet an Ethernet-based data link protocol capable of providing dynamic QoS management to further exploit the variable requirements of dynamic applications. This paper presents. the FTT-Ethernet protocol, which efficiently supports hard-real-time operation in a flexible way, seamlessly over shared or switched Ethernet. The FTT-Ethernet protocol employs an efficient master/multislave transmission control technique and combines online scheduling with online admission control, to guarantee continued real-time operation under dynamic communication requirements, together with data structures and mechanisms that are tailored to support dynamic QoS management. The paper includes a sample application, aiming at the management of video streams, which highlights the protocol's ability to support dynamic QoS management with real-time guarantees.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11