After defining the model of periodic task with multiple QoS grades for weakly hard real-time system,this paper presents DRM weakly hard real-time scheduling algorithm based on RM scheduling policy.

This paper presents the definition of a weakly hard real-time system, and summarizes the existent constraint specifications of this system and their relationships.

In this paper, We propose a new results fusion algorithms of meta search engine, which is based on soft real-time system.

The feedback EDF scheduling is analyzed and improved which is fit to the DVS based hard real-time systems,and how to use this improved algorithm to modify the task scheduling of the μC/OS-Ⅱ kernel which is applied to the DVS based hard real-time systems is introduced.

In the light of the drawbacks that conventional genetic algorithm converged at local optimum when applied in pre-run-time scheduling of hard real-time system, a search approach based on DNA Genetic algorithm was proposed.

Scheduling algorithms based on meet any weakly hard real-time constraint;

The Research of Weakly Hard Real-Time System Based Improved Constraint and Its Algorithms;

In overload conditions,the QoS of applications with weakly hard real-time constraint is degraded diversely.