QoS-based Scheduling Scheme in Overload Conditions for Weakly Hard Real-Time Systems

J. Martyna (Poland)


Communication systems, multimedia communications,QoS parameters, weakly hard real-time systems, scheduling theory, delay bound.


We consider the problem of overload conditions for com munication systems that belong to weakly hard real-time systems. In these systems, the strict respect of all dead lines is not needed in many situations, such as multimedia communication, IVOD systems or control systems. We in troduce some of the aggregated QoS requirements in a uni form formula that allows for scheduling with the consider ation of various performance measures, such as burst size, loss rate, etc. The proposed QoS-based scheduling scheme may have hidden benefits for a.o. scheduling of multimedia data streams which have not been previously explored.

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