ORTEGA: An efficient and flexible online fault tolerance architecture for real-time control systems

Xue Liu, Qixin Wang, Sathish Gopalakrishnan, Wenbo He, Lui Sha, Hui Ding, Kihwal Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)


Fault tolerance is an important aspect in real-time computing. In real-time control systems, tasks could be faulty due to various reasons. Faulty tasks may compromise the performance and safety of the whole system and even cause disastrous consequences. In this paper, we describe On-demand Real-TimE GuArd (ORTEGA), a new software fault tolerance architecture for real-time control systems. ORTEGA has high fault coverage and reliability. Compared with existing real-time fault tolerance architectures, such as Simplex, ORTEGA allows more efficient resource utilizations and enhances flexibility. These advantages are achieved through the on-demand detection and recovery of faulty tasks. ORTEGA is applicable to most industrial control applications where both efficient resource usage and high fault coverage are desired.
Original languageEnglish
Article number4753900
Pages (from-to)213-224
Number of pages12
JournalIEEE Transactions on Industrial Informatics
Issue number4
Publication statusPublished - 1 Nov 2008


  • Industrial control
  • Real-time and embedded systems
  • Reliability and robustness

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Electrical and Electronic Engineering


Dive into the research topics of 'ORTEGA: An efficient and flexible online fault tolerance architecture for real-time control systems'. Together they form a unique fingerprint.

Cite this