Mode change protocols for priority-driven preemptive scheduling

Lui Sha, Ragunathan Rajkumar, John Lehoczky, Krithi Ramamritham

Research output: Contribution to journalArticlepeer-review


In many real-time applications, the set of tasks in the system, as well as the characteristics of the tasks, change during system execution. Specifically, the system moves from one mode of execution to another as its mission progresses. A mode change is characterized by the deletion of some tasks, addition of new tasks, or changes in the parameters of certain tasks, for example, increasing the sampling rate to obtain a more accurate result. This paper discusses how mode changes can be accommodated within a given framework of priority driven real-time scheduling.

Original languageEnglish (US)
Pages (from-to)243-264
Number of pages22
JournalReal-Time Systems
Issue number3
StatePublished - Dec 1989
Externally publishedYes

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Modeling and Simulation
  • Computer Science Applications
  • Computer Networks and Communications
  • Control and Optimization
  • Electrical and Electronic Engineering


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