After analyzing status quo of high dependability safeguard mechanism

an integrated high dependability safeguard systematic framework supporting multilevel criticality in which several subsystems share the same system resources is brought forward.In order to avoid deleterious interferences between subsystems with different criticality

a kind of high dependability temporal isolation mechanism based on two level scheduling approach is brought forward.In order to realize this mechanism

integrated high dependability safeguard mechanism supporting multilevel criticality based on single node computer is emphatically researched .The scheduling model is constructed.The schedulability of tasks and subsystems are analyzed.The correctness of time isolation mechanism is proved by several samples.The conclusion of researching on high dependability safeguard may be applied to the other no safety-related areas

and has great practicability.