Token-ring adapter-chipset architectural considerations for real-time systems

Thomas E. Marchok, Jay K. Strosnider, Hideyuki Tokuda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


The results of implementation studies utilizing commercially available IEEE 802.5 chip sets and boards are reported. Serious implementation flaws were discovered that prevent the full potential of the IEEE 802.5 token ring standard from being realized for real-time applications. Specifically, unbounded delays can be introduced which not only destroy the desired response time determinism offered by algorithmic scheduling, but which also negate asynchronous alert class guarantees and unnecessarily increase other asynchronous response times. An analysis is made of the scheduling properties of current implementations, and modifications to the current implementations are proposed to allow them to realize the full potential offered by the IEEE 802.5 standard for real-time applications.

Original languageEnglish
Title of host publicationProceedings - Real-Time Systems Symposium
Editors Anon
PublisherPubl by IEEE
Number of pages12
ISBN (Print)0818620048
Publication statusPublished - 1989
Externally publishedYes
EventProceedings - Real-Time Systems Symposium - Santa Monica, CA, USA
Duration: 1989 Dec 51989 Dec 7


OtherProceedings - Real-Time Systems Symposium
CitySanta Monica, CA, USA


ASJC Scopus subject areas

  • Engineering(all)
  • Computer Networks and Communications
  • Hardware and Architecture

Cite this

Marchok, T. E., Strosnider, J. K., & Tokuda, H. (1989). Token-ring adapter-chipset architectural considerations for real-time systems. In Anon (Ed.), Proceedings - Real-Time Systems Symposium (pp. 79-90). Publ by IEEE.